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pictochrom_&_graph_service_manual_v2

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1. O a f z 3 E3 ee L J a TE 5 5 ol a en AUS O dal 3 RIH I 1 4 11 20 PICTO KEYBOARD DISPLAY PCB MA4820A Check the following voltages 5 V LED 0 2 V on X31 9 against X31 8 Gnd 5 V LED 0 5 V on X31 1 against X31 5 0 V LED Correct N Check cable Contrast adjustments of characters in the display Adjustable via R16 from 5 to 600 mV Full contrast 600 mV No contrast 5 V Correct N Check R15 R16 C3 display Brightness adjustment of display illumination and of the seven segment display This can be adjusted by potentiometer R4 Measure on X34 1 against X34 3 V5 1 must be adjustable via potentiometer R4 starting from fully left turned position 1 45 V 0 15 V to fully right turned position 3 20 V 0 3 V On V5 7 we find the square wave signal as shown in 1 it E Vol Via R10 and C2 we receive the saw tooth signal shown in Fig 2 TE ER I 3 5 5 5 ms i 5 10 12 1 6 Veg H 0 2 33 Y 19 Y DOFF signal becomes effective during exposure This signal switches off the display illumination via V3 Measure on V5 8 and 14 against 0 V V5 generates a 3 pulse signal during full illumination Fig 3 and when N N N N unlit the output approaches 5 V vS 14 On the collector of V7 it must thus be possible to 4 measure a signal as shown in Fi
2. N Check V3 V10 Check for short inputs of V25 Press and hold the head down key Measure a H level at V3 4 Correct N Check V3 V26 Press and hold the head down key Measure a L level at V3 11 Correct N Check V3 V10 Go to III 3 6 4 III 3 6 2 128 Hold the head down key Check for L level at V26 9 Correct N Check for interrupted path Hold the head down key Check for H level at V26 8 Correct N Check V3 path Check V25 Release the key and measure again L level N Go to III 3 6 4 Measure a L level at V3 5 Correct N Replace V26 Press and hold the head down key Measure H level again Correct N Replace V26 Check path Check V3 V16 LED IH 3 6 3 129 Measure a L level at R5 Correct N Is head in highest position N Check top limit switch Check limit switches on lens support Y Go to III 3 3 1 Press and hold the head up key Measure a L level at R11 Correct N Go to III 3 6 1 Press and hold the head up key Measure a H level at V3 11 Correct N Check V3 V10 Check for short inputs on V25 Press and hold the head up key Measure a H level at V3 3 Correct N Check V3 V26 Press and hold head up key Measure a L level at V3 10 Correct N Check V10 V3 Hold the head up key Check for L level at V26 8 Correct N Check for inte
3. 2 Release screws 21 and exchange defective friction spring 22 or friction shaft 23 3 To do so release screws 24 Remove entire adjustment knob assembly 4 Drive out spring sleeve 25 and exchange friction shaft 23 5 Retensioning can be carried out by means of screws 21 1 Lower lens holder to lowest position 2 Release screws 26 and exchange defective friction spring 27 or friction shaft 28 3 Retensioning can be carried out by means of screws 26 Caution The friction springs 22 and 27 may only be tightened with the screws 21 26 enough to hold the loaded lens carrier stationary in any desired position Excessive tightening of the friction springs 22 27 leads to premature wear of the sliding pads friction shafts and column groove Exchanging the drive pinion or drive wheel of the lens adjustment Exchanging the column sleeves right hand lens column I 2 1 5 56 1 Lower lens holder to lowest position 2 Release screws 21 3 Remove entire adjustment knob assembly via screws 24 4 To replace toothed wheel 29 drive out spring sleeve 25 Remove toothed wheel from friction shaft 23 5 To replace pinion 30 drive out spring sleeve 31 Release the two grub screws 32 and pull out shaft 33 The pinion 30 can now be exchanged 1 Raise enlarger head to its maximum height 2 Remove negative c
4. If the lamp is not working check the lamp EST PCB The display shows This step is used to check the 3 stepper motors and their limit switches With the L D key all 3 motors can be regulated simulta neously With L S19 key you can swing out the filters With D key S20 you can swing in the filters When all filters are out the limit switches are activated and on the display appears HEAD SWCT 111 If the filters are in the display goes to 000 Correct N Check limit switches Check data lines cables With key 528 you can determine the step size The display shows full or half full or half steps This can be measured on V2 V7 V10 19 H level half steps L level full steps V ref R20 R21 1 35 V 0 06 V R1 R2 R5 R6 R8 and R9 gt 4 7 Q 0 25 Q for current limit I 1 5 10 34 TEST 9 TEST 09 TEST RAM ERROR 1 RAM MEMORY DEFECT SWITCH THE POWER OFF AND ON TO CHECK IF RAM REALLY DEFECT The three filter motors are controlled by a CLK signal via V2 V7 V10 18 Cik 2 7 1 0 18 V2 V7 V10 11 control can be seen only if the filters are moving Control Y2 Y7 10 11 4 5 ms F 170 ls amp 1 Correct N Go to Picto motor control PCB The display shows This step is used to check the RAM If no values are saved in the RAM or if data have been lost the display shows ERROR 1 RAM memory def
5. 109 KENE Vis Press the up or down and the key The lens must move at fast speed All measurements take place on the lens motor PCB Measure the signal at V9 C see layout schematics Correct N Check V9 Measure the signal at V7 3 Correct N Replace V2 V7 V8 Check R8 cables Check R5 V4 V5 on the power control interface PCB HI 2 5 6 110 3 Head movement failure I1 3 0 1 111 Possible faults The head can not be moved from the control panel LCD The head can not be moved at all The head can only be raised The head can only be lowered The head moves only at high speed or low speed is not correct and can not be adjusted Flow charts Flowcharts 3 1 3 2 3 3 3 4 3 5 3 6 3 1 The head can not be moved from the control panel LCD The head can not be adjusted via the Picto keyboard operating console Adjustment is possible via Head Adjust keys in control channel directly on AF unit In order to undertake this adjustment from the opera ting console an interface PCB Ailic interface has been installed in the AF unit This interface enables us to feed the functions head up head down rapid and film change position directly into the data bus of the AF 2000 processor keyboard display PCB These additional head contro
6. Autofocus memory check Kermit Data Saving on PC Wiring diagrams Section Concerns the enlarger Contents 2 1 2 2 Introduction System characteristics specifications and tolerances Power on cycle Error messages Description of PCBs System descriptions through the test program Connecting a roll paper easel I O Mechanical instruction Removing the enlarger head Exchanging the counterweight spring Adjusting the brake spring Exchanging the rubber clutch and the drive pinion Exchanging the locking knob Exchanging and retensioning the lens adjustment Exchanging the drive pinion or drive wheel of the lens adjustment Exchanging the column sleeves right hand lens column Exchanging the column sleeves left hand lens column top Exchanging the column sleeves left hand lens column bottom Exchanging the rollers Exchanging the latch bolts Exchanging the bellows Exchanging the colour filters Exchanging the colour filter motors and the microswitches Exchanging the density filter motors Exchanging the heat protection filters Exchanging the shutter motor 1 Introduction 1 1 System characteristics specifications and tolerances Film sizes Column height Max height with fully raised enlarger head Baseboard size Usable baseboard area Optical axis column distance Net weight Usable focal length Linear magnifications manual enlarger
7. Linear magnifications Autofocus enlarger Job memories up to 10x 12 5 cm 4x 5 roll film up to 12 2 x 12 2 cm 5x 5 148 cm 58 in 174 cm 69 in 4x64x69cm 1 5 x 25 x 27 in 64x57 cm 25 x 22 5 in 31 cm 12 2 in approx 60 kg 133 Ibs 50 150 mm 180 mm lens film size min on max on in inmm baseboard baseboard mm 150 10 x12 5 cm 0 90 x 6 6 x 4 x5 in 135 9 x12 cm 0 80 x 7 6 x 312 x 434 in 105 6x7 cm 6x9 cm 0 60 x 10 3 x 21 4 x 23 in 21a x 31 2 in 100 6x7 cm 6x9 cm 0 55 x 10 7 x 21 4 x 23 in 21a x 31 2 in 80 4 5x6cm 6x6cm 0 50x 14 0 x 13 4 x 21 4 in 2 4 x 21 4 in 50 24x36 mm 4 20 x 24 0 x lens film size min on max on in inmm baseboard baseboard mm 150 10 x12 5 cm 1 0 x 6 6 x 4 x5 in 135 9 x12 cm 1 0 x 7 6 x 312 x 434 in 105 6x7 cm 6x9 cm 1 0 x 10 3 x 21 4 x 23 in 21a x 31 2 in 100 6x7 cm 6x9 cm 1 0x 10 7 x 21 4 x 23 in 21a x 31 2 in 80 4 5x6 cm 6x6 cm 2 6x 14 0 x 13 4 x 2Va in 21 4 x 21 4 in 50 24x36 mm 5 8 x 24 0 x 200 I 1 1 1 Labom table max 10 6 x 12 0 x 16 0 x 17 0 x 21 0 x 36 0 x Labom table max 10 6 x 12 0 x 16 0 x 17 0 x 21 0 x 36 0 x Power Unit Mains supply Voltage stabilisation range Consumption Recommended climatic conditions Temperature Relative humidity Light source and illumination system Halogen lamp Lamp life Evenness of illumination intensity E fa
8. Reset key Measure a H level at V7 18 Correct N Go to III 2 3 14 Set the address switches to 4000 Set the mode selector to AD STOP Press and release the Reset key The TU must display 4000 RD LED on Correct N Check V4 shorted RD line Measure a L level at V7 18 Correct N Go to II 2 3 11 SSTEP once Check if the WR LED goes on RD LED goes off Correct N Check V4 Shorted RD WR line Set mode selector to stop SSTEP once Measure a H level at V7 18 Correct N Go to III 2 3 11 Measure a 1 2 MHz frequency at X1 2 Correct N Replace V2 Check if path is interrupted Power off Measure the DCV at V7 24 More than 3 5 Volts N Check battery on power control interface PCB as well as V1 V2 V3 I1 2 3 3 85 Power on Press Reset Set the mode selector to run Press the Test key Measure at V1 6 Correct N Go to III 2 3 13 v6 bt 20 us 3 33 ms ENTRY 1 Set the ad switches to 8000 Mode selector to AD STOP Press and release the Reset key Press and release the Test key Press SSTEP until the TU displays 8000 00 Measure a L level at V12 9 Correct N Replace V10 and V9 Set the mode selector to stop SSTEP once Measure a H level at V12 9 Correct N Replace V10 and V9 Measure a H level at V9 3 Correct N Replace V10 and V9 Measure a H level at V10 1 C
9. test 8 test 15 Spring for filter wheel has become displaced This error message only occurs in connection with the Picto probe on the Pictograph and Pictochrom Causes 1 In test 10 AUTO OFFSET A D CONVERTER for density measurement is exceeding its tolerances Values above or below 64 400 have been recorded Remedy Repeat test 11 operation amplifier V5 on micro controller PCB may be defective 2 OFFSET of measuring probe beyond tolerance values 01 650 Re calibrate offset V2 may be defective test 20 3 In the case of measurements with a lot of light the probe s mechanical chopper is not absolutely accurate test 20 Photo diode is not completely blacked out This error message appears when no signal is received from the measuring cells when an exposure is triggered Cause Lamp defective Blown fuse F2 Measuring cells faulty colour signal PCB test 15 Lamp inserted incorrectly Auto offset values beyond tolerances test 11 If this error message is displayed even though the lamp is working and has been correctly inserted the loop circuit is not functioning This message is a consequence of the previous message Cause A difference in density occurs during comparison between desired and actual values gt 0 5 D OFFSET error of A D converter test 11 OFFSET error of colour signal PCB check this PCB A D converter circuit defective microcontroller PCB The filter wheel d
10. 100 mA on microcontroller PCB V25 or V26 on microcontroller PCB if the receiver is functioning In connection with Optocable and a Durst enlarger the signal transfer can be made over 2 units by START ECHOLOOP TEST 18 The display shows TEST 18 TRANSMIT RECEIVE RAM DATA Via Test 18 data storage can be effected via a PC with TO FROM A PC Kermit ____ Byte TRANSMIT RECEIVE EXIT The following steps must be carried out 1 Enter via 001 in SETUP INSTALL RS232 Set RS232 to the following parameters 1200 Baud Handshake XON XOFF Time out 5 sec Switch enlarger on off to initialise interface and enter the test program by simultaneously pressing Light and Expose keys Select test 18 2 Load Kermit into PC System diskette on the left Kermit on the right B press Return after all PC commands Kermit Set speed 1200 loading time 3 1 2 minutes only 600 or 1200 baud possible with Picto 3 Send data to PC PC Log session picto Connect I 1 5 20 44 TEST 19 TEST 19 1 Adjust Trimmer R7 left TEST 11 2 Adjust Trimmer R8 right W Light of 1 Lux 152 2 D 1 0D _ TEST 20 V28 TEXT ____ V23 For accessing to set of test 1 19 Switch power off and close switch S2 on the microcontroller PCB TEST 20 R L B TEST 20 PROBE D 04 404 OFFSET TEST 11 64 400 OEODAHex OFFSET PROBE 01 650 D F OFFS _ LinSign 0 61000 0__ _Hex EXIT I 1 5
11. Filter motors Density motors Shutter motor Lamp and fan Motors RAM RAM initialisation A D converter Factory set only with simulator VCNA feature for Pictochrom Factory set only with simulator Filter motor control Filter control Measuring cells Lamp Measuring cells Filter motors Interference of the data transfer Data saving with PC and Kermit Only for Pictograph probe and Pictochrom probe 19 Adjustments for measuring probe Measuring probe 20 Special entering in this step Linearity error Light chopper probe Note Picto probes can be exchanged at any time without problems arising any adjustments Pictochrom and Pictograph probes are not inter changeable I 1 5 3 27 ENTRY INTO TEST PROGRAM FOR PICTOCHROM CL ENTRY INTO TEST PROGRAM FOR PICTOGRAPH PICTOCHROM TEST 00 NNMENU TEST NR TEST 1 TEST 01 NN MENU UIUIUIUIUIUIUIUIUIUIUIUIUIUIU UIUIUIUIUIUIUIUIUIUIUIUIUIUIU UIUIUIUIUIUIUIUIUIUIUIUIUIUIU I 1 5 4 28 Press and hold light and expose keys Power on The timer counts down from 2 99 to 0 00 Release the light and expose start keys Close Dipfix switch S2 on microcontroller PCB Then switch on enlarger via main switch Test steps 1 19 thus become accessible The display shows Correct N Check the contrast control on Picto keyboard PCB Check the 5 V on power supply PCB
12. R15 Check keys IN 2 1 2 80 Set the address switches to 8000 Press Reset key The TU shows 8000 RD LED on Press the following keys on this PCB Key Data S1 select EF S2 lens adj up F7 S3 lens adj down Fb S4 setup Fd S5 enter FE Correct N Check V11 Check keys Go to III 2 3 4 ENTRY 1 IN 2 1 3 81 2 2 Power supply Note The AF 2000 unit is supplied with power from the 100 V transformer output This enables us to adapt the entire system Pictograph Pictochrom AF to the widest possible range of supply voltages via only one voltage selector So the voltage selector on the power control interface PCB must remain set to 100 V All measurements refer to PCB power control Power on Measure the voltage at P1 It must be 5 V 0 2 0 05 Correct N Power off Open the 5 V bridge Power on Measure the level at P1 If there are 5 V Check for shorted 5 V rail If there are not 5 V Check the voltage selector 110 V Check R20 V22 C13 Measure 5 V volt at V14 V17 V19 from pin 20 to 10 Correct N Check 5 V ground rail Go to III 2 3 IH 2 2 1 82 2 3 Processor PCB All ICs mentioned throughout this section are located on the processor keyboard display PCB Power on Measure the voltage at V3 from pin 14 to 7 It must be 5 VDC 0 05 0 15 Correct N Check ground and 5 V rail Check capacitors C1 C6 C9 C13 C15 Che
13. and fix the new part with the screw and washer 3 8 Re insert the axle 14 the bushing 13 and pay attention to the correct position of the parts 17 21 the spring disks 19 must be in right place and the coupling disk 18 must be clean and without grease or dirt 9 Find the correct position of the holes on the axle to be able to beat in the spring dowel sleeves 15 16 10 Remount the angle 10 and if necessary adjust the grub screws 11 until the brake operates as required 11 Mount all covers I 2 1 2 1 53 Exchanging the rubber clutch and the drive 1 Raise enlarger head to its maximum height pinion 2 Release screws 5 and remove hood 6 see Fig 3 3 Drive out clamping sleeves 13 push out shaft and exchange rubber clutch 14 or drive pinion 15 Exchanging the locking knob 1 Raise enlarger head to its maximum height 2 Remove negative carrier and light box 3 Remove screws from item 16 and take off cover plate 4 Release screws 17 and drive out locating disk 18 5 Pull knob 19 off and exchange locking knob 20 I 2 1 3 54 Exchanging and retensioning the lens adjustment Exchanging and retensioning on the main body I 2 1 4 55 1 Lower lens holder to lowest position
14. incorrect I 1 5 23 47 1 6 Connecting a roll paper easel 1 0 74 HL 373 Wo 5u DIH connector 6 pol 4 Foc on Gnd I I I I I Exp end 2 2a Le Timing diagrarn Focus on ae focus on enlarger not allowed rs eup start _ Starts exposure on enlarger jp I expend 1 f exposure time I 1 6 1 48 A roll paper easel can be connected to the Pictochrom CL Pictochrom and Pictograph by means of an eight pin DIN plug X4 The pin allocations are as follows Shut open X4 3a input signal Focus X4 1b Exp start X4 3b Exp end 1 X4 2b output signal Exp end 2 X4 2a The otherwise familiar Ready signal is not employed on the Pictochrom CL Pictochrom and Pictograph The enlarger does not need a Ready signal in order to recognise control signals Focus signal The Focus signal is used to adjust and check the focu sing When the key is activated the signal on X4 1b is drawn towards 0 V for a short time L active signal and the enlarger switches unfiltered light on If the Focus key is pressed once more the lamp goes out again Exp start signal 200 500 ms When the Expose key on the paper easel is pressed the level on X4 3b is drawn from 5 V towards 0 V for a short time L active This switches the enlarger lamp on the light is correctly filtered and exposure is started After the exposure
15. key Input Exit and press Enter After successful data transfer switch the enlarger off and on again to start the setup cycle IV 0 6 145 durst CIRCUIT amp WIRING DIAGRAMS 14 06 2005 Section V Diagram Chrom Chrom Graph Chrom Graph PCB Description Code no Idx CL Plus Plus AF AF Pdf Lamp EST UL 4501 OLD Pcb 1872650 X X X X X x Microcontroller PCB A Version AC48301 OE X Microcontroller PCB B Version AC48303 OE X Microcontroller PCB D Version AC48307 2E X X X X x Picto Motor Control AC48351 OE x X X X X x Wiring diagram Chrom Graph AC48400 2C X X Wiring diagram Chrom Graph AC48400 5C X X 6C Wiring diagram AF versions AC48401 3C X X Wiring diagram AF versions AC48401 6C X X JC Picto Power Supply AC48451 3E X X X X X 6E Picto Colour Signal AL48301 3E X X X X X AE Factor Pot PCB AL48451 OE X X 1E Picto Keyboard Display MA48201 OE X X X X X X Power Control Interface PCB MA60201 1E X X X Processor Keyboard Display PCB MA60302 2E X X 3E Motor Control 24 V lens MA83305 2E X X 3E Picto Probe MB48201 4E X X X X BE Lamp EST UL 4501 NEW Pcb MC48201 0D x x x X Picto AF Elite 2000 Ailic interface MP30202 OE X X X Lens Motor XA90201 OE X X X Soldering plane layout lens motor XA9020A 0Z X X X V 0 1 durst Durst Phototechnik AG
16. 21 __ OFFS PROBE 15 10 __ 45 Picto Press Start TRANSMISSION Press Stop when number of bytes reaches zero PC Press Ctrl and simultaneously Press C cursor moves to command line Close session 4 Receiving data from PC Picto Press Start RECEIVE PC Transmit picto or other file name used Type q command when number of bytes on Picto reaches zero exits Kermit To exit PC system press Ctrl Alt and Del simultaneously The display shows This test only applies to the Pictograph and Picto chrom Its purpose is to adjust the measuring probe You re recommended to send the probe back to the factory for precise adjustment The Picto probes can be exchanged one by the other without problems The display shows In test 20 the linearity of the probe can be checked In order to get into test 20 S2 on the microcontroller PCB must be opened When switching the enlarger on keep Expose Start and Light keys depressed Then press R and L keys simultaneously Before the B key is pressed with light has to be switched on via the W light key Then press key B How to proceed LED on probe must light up Activation of the probe key causes the LED to go out and the chopper is opened can be heard The probe key must be pressed every time a measure ment is taken I 1 5 22 46 Move the head to the middle position Using the diaphragm set a valu
17. After loosening grub screws 46 drive out sleeves 47 and replace them Caution The friction spring 27 may only be tightened with the screws 26 enough to hold the loaded lens carrier sta tionary in any desired position Excessive tightening of the friction spring 27 leads to premature wear of the sliding pads friction shafts and column groove Exchanging the rollers 1 Remove counterweight springs 11 in accordance with instructions 2 1 1 2 Release screws 48 of holding bracket 49 3 Dismantle spring retainer 50 4 Remove enlarger head 51 upwards of the column S SS H 5 Remove rollers 52 and replace them es Re MR TEE be Bs h 51 I 2 1 7 58 Exchanging the latch bolts 56 Exchanging the bellows 1 Remove screws from item 53 and take off cover plate 2 Swivel enlarger head through 30 securing it with the locking knob 4 3 Press off locking ring 54 of the bolt 55 to be replaced pull eccentric knob outwards slightly and pull out latch bolt 55 towards the back 4 Slide spring 57 onto ne
18. ICs are located on the processor PCB Measure the levels at V10 1 2 3 L LH Correct Y Replace V10 Check SIN 1 path Check the levels at V5 1 2 3 4 6 L HL LH Correct N Check paths Replace V5 Check paths HI 2 4 8 104 2 5 Lens movement failure Following failures are possible The lens motor moves only at fast speed Y To check out this failure go to IIl 2 5 5 The lens motor moves only in one direction or does not move at all Y To check out this failure go to IIl 2 5 2 The speed is not accurate 1 Check spindle for dirt 2 The low speed is achieved by pulsing the up or down command At fast speed the command stays at H level at the time Neither the low nor the high speed are regulated and are therefore sensitive to lopsided mains voltages To compensate change R1 on the lens motor PCB TH 2 5 1 105 I1 2 5 2 106 Press the indicated keys and measure at V13 on the power control interface PCB Key V13 pin level up 18 H rapid 16 L down 18 L rapid 16 H N Go to III 2 5 3 Press the indicated keys and measure at V2 on the lens motor PCB Key V13 pin level up 1 L rapid 2 H down 1 H rapid 2 L N There must be a voltage of 2 V at V2 4 and V2 6 Otherwise check R2 R5 C3 V2 C2 cables connections Check R6 R7 V2 cables connections Check R1 R3 V1 motor Power off Disconnect lens motor plug X6 Connect Z 80 TU Addre
19. V23 5 N Check V25 Release the key head up Is there a H signal at P2 N Check V36 V42 and motor resp setting of trimmer R67 Is there a H signal at V21 11 N Check V21 Is there a L signal at V10 8 N _ Go to III 3 6 1 Press and hold the key head down Are there 2 V at P4 I1 3 2 2 P6 N Check V24 resp setting of trimmer R46 min speed Are there following pulses at P6 N Check V24 Are the same pulses inverted at V25 4 N Check V10 V25 Release the key head down Press and hold the key head up Are the same pulses at V25 3 N Check V10 V25 The faults are at V27 V29 V34 V40 V45 V46 V47 V48 V49 V50 HI 3 2 3 116 3 3 The head can only be raised Yan 4 15 ms 1 4 ms jt 29 collector 15 ms 1 4 ms Mt Press and hold the head down key LED V16 must come on LED V18 must be off N Go to III 3 6 2 Press and hold the head down key Is there a H signal on V25 5 N Check V19 V21 Press and hold the head down key Measure following signal at V25 4 Correct N Go to III 3 3 3 Hold the head down key Measure the signal at V29 collector Correct N Replace V29 Check R56 R66 path Press and hold the head down key Measure 8 2 V ac
20. V26 HI 3 3 4 120 3 4 The head can only be lowered Yan 15 ms _ 4 14m le 27 collector 15 ms 1 4 ms jt Press and hold the head up key LED V16 must be off LED V18 must come on Correct N Go to III 3 6 4 Press and hold the head up key Measure a H level at V25 1 Correct N Check V19 V21 Hold the head up key Measure the signal at V25 3 Correct N Go to III 3 4 3 Hold the head up key Measure the signal at V27 collector Correct N Replace V27 Check R67 R58 path Press and hold head up key Measure 8 2 V across V38 Correct N Go to III 3 4 3 Entry 1 Press and hold head up key Measure 0 V across V41 Correct N Go to III 3 4 4 IN 3 4 1 Release the head up key Measure 8 2 V across V41 Correct N Go to III 3 4 4 Press and hold the head up key Measure 24 V at V29 collector Correct Y Check V40 V39 V45 V46 Measure L level at V25 4 Correct Y Check V25 V29 Check V19 V21 V25 MI 3 4 2 122 25f2 i 15 ms 1 4 ms it Vea 4 1 8 ms 4 25 ENTRY 1 Press and hold the head up key Check the signal at V25 2 Y Check V25 Hold the head up key Measur
21. all Are there 24 4 V at P8 N Check connections Check V1 and F1 on head motor interface PCB Are there 12 0 5 V at P7 N Check V32 V33 V34 V35 R65 Press and hold the key head down LED V16 is on V18 is off Correct N Go to III 3 4 3 Is there a H signal at V25 5 N Check V19 V21 path Is there a L signal at V17 12 and 9 N Check V26 path Is there a H signal at V26 3 N Check V17 V19 V26 Release the key head down Press and hold the key head up LED V18 is on V16 is off Correct N Go to III 3 6 4 Press and hold the head up key Is there a H signal at V25 1 N Check V19 V21 Is there a H signal at V26 4 N Check V17 V19 V26 Release the key head up Is there a sawtooth voltage at V20 6 as per diagram Y20 6 N Check V20 IH 3 2 1 114 P1 Ht 100 us 25 15 3 ms 25 P3 __ 1 8 ms 25 23 13 H r 1 8 ms 25 23 5 F 1 8 ms t 25 Are there negative pulses at P1 as per diagram N Check V20 Are there positive pulses at P3 as per diagram N Check V15 Press and hold the key head down Are there following pulses at V23 13 N Check V25 V15 Release the key head down Press and hold the key head up Are there following pulses at
22. if the machine does not react as requested Takes a closer look at each step General The Z 80 CPU is not used as in the Pictochrom CL Pictochrom and Pictograph it is not possible to check the unit with the aid of addresses Therefore the data paths and different input and output components must be checked while the unit is on In this case the levels can not be kept stable With the aid of the test program you can check virtually the whole unit and its functions Data and or address lines can mostly be checked via test 3 in the test program Steps 1 Entry into test program Display test 2 Keyboard test 3 V37 input test 4 Timer display test 5 Lamp test 6 Motor test 7 Density shutter lamp and fan test 8 Stepper motor test 9 RAM battery test 10 RAM function initialisation 11 Auto offset 12 Photometer log signals 13 Photometer lin error 14 Continuous test filter control 15 Photometer test 16 Closed loop 17 Serial interface RS232C 18 Transmit Receive RAM data I 1 5 2 26 Parts under test Picto power supply PCB Microcontroller PCB Picto keyboard display LCD display Picto keyboard display Microcontroller PCB V37 on microcontroller PCB Filter limit switches Roll paper easel Probe Possible test of the data bus 7 segment display Picto keyboard display PCB Factory set only with simulator Motor control PCB
23. the 3rd LCD line Measured value C 39 0 approx 6 0 secondary densities Measured value M Measured value C 50 0 3 Measured value Y Measured value C 70 0 3 Note The basic value 39 0 may deviate by 10 0 For calcu lation purposes the value indicated must be taken If an error occurs check offset amplification and measuring cells TEST 11 12 13 15 Start off with the filter value that indicates 0 Input the values for gradations 0 and 5 and check measured values in the 3rd LCD line Gradation 0 Y 129 M 0 C 30 Measured value M 39 0 approx 8 0 secondary densities Measured value Y Measured value M 129 0 3 Measured value C Measured value M 30 0 3 Gradation 5 Y 0 M 170 C 30 I 1 5 18 TEST 16 CL H Eteff TV y m c 0000 0000 0000 000 000 2 000 3 MSC YMC Variable display values possible TEST 17 TEST 17 RS 232C Start Start TRANSMISSION STOP Dummy plug connection ECHOLOOP EXIT Measured value Y 39 0 approx 12 0 secondary densities Measured value M Measured value Y 170 0 3 Measured value C Measured value Y 30 0 3 Note The basic value 39 0 may deviate by 10 0 For calcu lation purposes the value indicated must be taken If an error occurs check offset amplification and measuring cells TEST 11 12 13 15 MSC The mechanical setting of the colour filters can be checked via MSC In this case the ad
24. the functional conditions of approx 28 signal lines a real time test is an almost impossible task when using normal testing equipment With the test unit it is possible to slow down the program sequence and to process the single orders in a step by step fashion All signal conditions can be maintained indefinitely until the execution of the subsequent order and may thus be tracked with conventional measuring equipment e g an oscillograph To do this just use test clip 12 to join the test unit to the microprocessor The unit is then ready for operation Fig 1 shows a front view of the test unit Here below you find a short description of the various displays and keys MEM LED 1 To indicate that a memory component has been activated M1 LED 2 To indicate that the data input is an OP code This is useful in case of orders consisting of several bytes RD LED 3 To indicate that data are being read from a memory READ WR LED 4 To indicate that data are being written into a memory WRITE III 6 0 1 138 III 6 0 2 139 ADDRESS DISPLAY 5 To indicate the address being docked at the address bus DATA DISPLAY 6 To indicate the datas being docked in the data bus RESET KEY 7 With this key the microprocessor s RESET input may be activated It must be pressed each time the unit is switched on TEST KEY 8 This key interrupts the program sequence It also starts the t
25. the negative leading edge at P3 as per diagram Correct N Adjust with R25 Set the head to center position Press the head up key Measure the signals at V23 5 They must correspond to the signals at P3 N Check V25 HI 3 5 1 125 Press the head down key Measure the signal at V23 13 It must correspond to the signal at P3 N Check V25 Press and hold the head up key Measure 2V at P4 Correct N Adjust with R46 Check V24 V10 Check V23 V24 V10 I1I 3 5 2 126 3 6 Flow charts Press the keys indicated and measure at V13 on power control interface PCB Key V13 pin level head up 14 H 12 L 9 L head down 14 L 12 9 L rapid 14 L 12 L 9 H N Go to III 2 5 3 Check on power control interface PCB V10 V11 V12 R9 R10 R11 Connection Check on head motor interface PCB R1 R9 V2 V6 HI 3 6 1 127 Measure a L level at R2 Correct N Is head in lowest position N Check bottom limit switches Check limit switches on lens support Y Press and hold the head up key Check LEDs V16 V18 V18 is on V16 is off N Go to III 3 6 4 Y Go to III 3 4 1 Press and hold the head down key Measure a L level at R15 Correct N Go to III 3 6 1 Release the head down key Measure a H level at R15 Correct N Check V14 Press and hold the head down key Measure a H level at V3 10 Correct
26. the soft start slope When mains current is applied the output does not surge at once but increases gradually until reaching the nominal voltage Across C3 D3 a negative voltage is formed taking 0 as reference which is used as the overvoltage protection input to the U210B The voltage across C4 is measured and determines the trigger delay time The firing pulses are applied at pin 2 of the opto coupler OK3 The same firing pulses appear at pin 4 of this optocoupler I 1 4 7 16 U Component plan LAMP EST UL 4501 PCB 1872650 o Durst EST UL 4501 o FAA Ll 9 LA 2 I 1 4 8 17 COLOUR SIGNAL PCB AL4830A 0Z AL4831A 0Z The colour signal PCB is situated in the enlarger head The following circuit boards are used AL4830A for Pictochrom CL Pictochrom AL4831A for Pictograph These circuit boards are differently equipped different types of filters are used for Pictochrom CL Pictochrom and Pictograph If relatively large deviations and instabilities occur during processing check the adjustment of the photoelectric cells in the light box Check the following voltages 12 V 0 6 V on V1 7 0 3 V 50 mV on V1 4 In order to carry out the adjustment go to test 16 in the test program Measure voltage of P1 P2 and P3 relati
27. turns on The NV LED turns off Highest head position value is stored The PV LED turns off This procedure initialises the head limit position registers The potentiometer values in highest and lowest head position are stored in the RAM This obviates a precise mechanical adjustment TH 1 5 2 75 2 Test program A Entry into normal test program Keyboard test In case the part causing the problem is not evident use this procedure to localise it The steps must be executed in sequence do not jump steps as the logical reasoning behind this works per exclusion When a problem occurs the most successful way to track down the failure is indicated A Normal test program B Continuous test program 1 C Continuous test program 2 Press and hold the Enter key Power on All LEDs displays are switched on for 1 5 sec Correct N The display does not lit up Go to III 2 2 The unit enters the operation mode Go to III 2 1 Go to processor PCB check III 2 3 Press any key except Enter key Key Code Display select 016 Lens up 008 Lens down 004 AF setup 002 080 072 CH lens 068 Size head adjust head up 136 rapid 132 Head down 130 These keys can be activated only in the test program on the AF unit Press the Enter key The display shows the factor value Correct N Go to II 2 4 HI 2 0 1 76 Encoder test Move head to lowest position appr
28. 2 Eproms motor control circuit for measuring probe chopper output X9 for AF commands and factor signal input for VCNA feature Note D Version is compatible with the B Version B Version can not substitute D Version and is no longer used in newer Pictograph units Check the printed circuit board as follows The following voltages are measured against PO Power on 5 V 0 15 V on X7 6 12 V 0 6 V on X7 12 12 V 0 6 V on X7 14 0 3 V 30 mV on V31 K Reset signal on X7 10 after switching on Reset on V43 1 must be delayed by 60 200 ms with x 60 200 ms mains on The data lines can be checked in test 3 of the test program Specific errors can also be rectified via the test program Not only this printed circuit board but all peripheral parts can be checked with the help of the test program Check ERROR MESSAGES Go to Point I 1 5 System description through the test program I 1 4 14 23 Component plan AC4830A Picto Microcontroller PCB Durst electronics PICTO MICROCONTROLLER PCB AC 4B 32A B vi KEYBOARD a a 3 p as A m x a a D d D fial a z m lt a fa 8 bj 5 ze am DI 771 D f N w N a p D fe Q m PS 5 U
29. 5 a i N T oo i i E Od lectronics i PICTU MICROCONTROLLER PCB J a Q RB 8 Fi ca cas a RS Ra CO R 8 k se E DO rz vaz KEYBOARD a oe CY ie oe z Ok sO iH ea ee na ua t T U EN i RS232 R O 8 f P u N LE i g fi B hgs ds 63 sa 3 dis 6 al q x70 x x fe is m x O 5 E ae EH Bea Be a 2 0 m A x j x a F te Is rg 1 990999 va we 3 a a F A S gl N ze Cea ou oe e Coreg l 3 pa O JF gl z 6 je a II EEE T Heo va p EI ma De 5 O EI EN u oO z ea 3 I 1 4 15 24 1 5 System description through the test program I 1 5 1 25 To isolate the cause of a failure to a field replaceable unit go through the following pages Each page is made up like this Headline Summarises action and allows some parts to be skipped Description Informs what must be done and how the unit must react Notes failures Informs what to do
30. Autoprint is unsuitable for multiple exposures I 1 6 1 49 2 Mechanical instructions 2 1 Removing the enlarger head Exchanging the counterweight spring Adjusting the brake spring Exchanging the rubber clutch and the drive pinion Exchanging the locking knob Exchanging and retensioning the lens adjustment Exchanging the drive pinion or drive wheel of the lens adjustment Exchanging the column sleeves right hand lens column Exchanging the column sleeves left hand lens column top Exchanging the column sleeves left hand lens column bottom Exchanging the rollers Exchanging the latch bolts Exchanging the bellows 2 2 Exchanging the colour filters Exchanging the colour filter motors and the microswitches Exchanging the density filter motors Exchanging the heat protection filters Exchanging the shutter motor I 2 0 50 Removing the enlarger head 1 Raise enlarger head to its highest position 2 Remove lens negative carrier and mixing box and remove plug for shutter and enlarger head X21 3 Release screws 1 and remove enlarger head 4 Release screws 2 and remove pressure spring 3 5 Completely unscrew securing knob 4 and pull enlarger head mounting outwards to remove I 2 1 1 51 Exchanging the counterweight spring Adjusting the brake spring I 2 1 2 52 1 Raise enlarger head to its highes
31. B is activated When switching on the light the standby signal goes to 5 V Lamp On Signal X19 1b approaches 0 V when lamp is switched on Opto electronic coupler OK1 on EST PCB is activated Simultaneously the fan switches on 24 V AC can be measured across X19 4a and X19 5a I 1 4 6 15 Correct N Check F2 12A T Check F1 Check transformer Correct N Check F1 Check transformer Correct N Go to motor control PCB V17 V18 Check V17 and V18 Go to test 7 Correct N Check transistor T2 Check thyristor Q2 If lamp is switched off voltage of the fan drops to 0 V Lamp Lamp voltage can be measured across X19 6 7 8a and X19 3a In Standby mode the voltage is approx 5 V In Lamp On mode it rises to 23 5 V RMS 23 V RMS should however be measurable on the lamp base The voltage can be adjusted via P1 Voltage drop on cable is 0 5 V This is a phase angle controlled lamp voltage see Fig oY X19 6 7 8b to X19 3a Specifications Input voltage 32 V AC Output voltage 23 5 V RMS Type of regulation phase chopping N Check transistor T2 Check thyristor 02 Circuit description The control IC1 uses the mains voltage as supply voltage Pin 14 VDD Pin 2 VCC Lamp voltage can be adjusted with P1 The voltage reaches the feedback input of IC1 C6 is the timing capacitor which determines
32. D STOP Press and release the Reset key Measure a L level at V1 3 Correct N Replace V5 Set mode selector to stop SSTEP once Measure a H level at V1 3 Correct N Replace V5 Check for shorted or interrupted path Measure the frequency at V3 8 Yard 3 33 ms ao ee ee E 3 33 ms Correct N Check V3 V1 Measure the frequency at V1 6 Y1 6 HM H 3 33 ms ale te 3 33 ms Correct N Check V1 Replace in the following order V7 V4 R4 V6 HI 2 3 13 95 Measure a H level at V1 9 Correct N Replace V4 Measure a L level at V1 8 Correct N Replace V1 Replace V8 IH 2 3 14 96 2 4 Power control interface PCB The processor PCB must be operational All measurements refer to the power control interface PCB Power off Remove lens motor plug X6 from the control channel Move head to midway 50 cm Measure the resistances 4b and 5a of the lens motor plug KOhm between contacts 4b and 5a of the lens motor plug 7 gt R gt 2 5 KOhm Correct N Check factor pot R1 Check calibration III 1 5 Reconnect lens plug X6 Press and hold the Enter key Power on Thus the test program is selected All following measurements take place on the power control PCB Press the Enter key once The unit exits the keyboard test and enters the potentiometer test Measure the s
33. Division Phototechnik Postfach 223 Vittorio Veneto StraBe 59 I 39042 Brixen Italy Telefon 0472 83 06 20 Telefax 0472 83 09 80 e mail durst durst it e mail service department service durst it Internet www durst online com www durst it Studio Durst SM 8SM01320
34. IN S12 uy uo ep u wo u u u S13 if J J i y J i S14 CLEAR STOP CLEAR STOP TIPS ISIS IS PS PSF S15 m SIZE M SIZE ef WAR Re a Lele re lal S16 CHANNEL CHANNEL EN S17 R R S18 M M Page Pm Pom Pom Pom Som Pam S19 L L TT 3 u B B B B al B fa art T S22 C c S23 B B ae r t a I I I S25 lt SK1 u uo ep un un un un un S26 gt SK2 S27 4 SK3 S28 T SK4 I 1 5 5 29 TEST 3 TEST 03 MSB 11100000 Variable display values possible V37 INPUTS EXIT I 1 5 6 30 KEY S29 DISPLAY ON OFF S31 HELP S32 OPTION S33 W LIGHT S34 EXPOSE START S35 LIGHT S36 F STOP 537 TIME S38 STO PRINT 39 RCL SHOW S40 NO ON LINE S30 EXIT CODE WORD DISPL ON OFF HELP OPTION W LIGHT EXPOSE START LIGHT F STOP TIME STO PRINT RCL SHOW STO PRINT NO ON LINE When this key is pressed the test 00 appears on the display Correct N A Only one key is not recognised check path key B One complete column of keys is not recognised check V9 on Picto keyboard PCB C One complete row of keys is not recognised check V3 on Picto keyboard PCB D The display shows different characters The functions do not correspond to the key pressed check data bus on the Picto keyboard display PCB TEST 3 The display shows This step helps to check the input output component V37 on the microcontroller PCB The followi
35. P1 5 1 DCV 0 15 V This 5 V current is used for the entire electronic system It is generated via an L296 Switching on generates a reset signal Correct N Check mains voltage F1 F2 on power supply PCB Check V8 rectifier Check F2 system Check motor control PCB possibly disconnect X17 and measure signal Correct N Check V1 voltage regulator 7812 and control element Correct N Check V2 voltage regulator 7912 and control element Correct N Check F1 V3 L296 and wiring Power on reset Measurable on X17 3 The Power on reset signal is generated via V3 L296 5 P1 on the Picto power supply PCB when the enlarger is switched on and serves to initialise the working i program erases the registers This signal depends on L296 C20 R5 and is effective for Re i 5 VAR 05V 60 200 ms x1773 ra HE m x 60 200 ms Component plan AC4845A 0Z Picto Power PCB 2 Ora xP wa RS 2 vE a Ors Jan ce EIB E ci amp CHB N I I E 3 aCe OL e a LE cat cy i van cn cay 22 i 0 i Pz O 7 Se Ee w E Bono Cio E A m Pu F Eu Durst electronics Picto Power PCB AC48454 02 I 1 4 3 PICTO MOTOR CONTROL AC4835A 0Z T
36. R15 Ro R a FLE ia M C 5 p 4 5 aL a cy Je z ova VE os oe ca RE Ra EB c a TH re OF fe ko eA es 1O a E 2 RUU ce mc Om ee ve Prats Bel Pos Gd AL SSR IE lo ve o x4 g m x48 CH 19 PICTO PROBE PCB MB4820A MB4821A The following circuit boards are used AL4821A for Pictochrom CL Pictochrom AL4820A for Pictograph These circuit boards are differently equipped different types of filters are used for Pictochrom CL Pictochrom and Pictograph The following voltages must be measurable against PO 12 V on solder point 6 0 3 V on V5 Check the following functions in the test program Test 3 When the probe key is activated the last figure displayed changes from 0 to 1 Test 7 Chopper and LED function correctly at 1 Hz Test 12 When the photo diode is darkened the density value in the 4th line rises to approx 400 Offset and amplification adjustment or the linearity check can be carried out with test 19 or 20 in the test program respectively Component plan Picto Probe PCB MB4820A 0Z ya Q woo AK gy PL RS RY a4 G ae R16 ca RI R11 O 1 Durst electronica ve a PICTO PROEE PCE FL al a MB 46B 204 02 t f Wa o ehe gt a LCL RS Rid Pa in E R
37. Switch power on No result The timer counts down from 3 00 sec to 0 00 The display shows If the shutter remains open it will be closed during the setup cycle Also the chopper in the measuring probe closes The colour filters swing out and switch the microswitches W Light position The lamp goes in standby mode The display goes to the last set filter and exposure time values The display shows M C D m NO Y a M _ C _ D f m NO Pe VCNA _ FOCVAR_P 00 SPOT F LIGHT Check fuse F1 Check connections Check Picto power supply PCB N Check microcontroller PCB Check Picto keyboard PCB Go to test 4 in the test program N Check microcontroller PCB Check Picto keyboard PCB Go to test 1 in the test program N Check shutter connector on rear side of the colour head Check shutter motor Go to test 7 in the test program N Check measuring probe for mechanical problems Check cable and connector Go to test 7 in the test program N Check filter motors Check microswitches Go to tests 3 6 8 in the test program Check motor control PCB Check mechanical position of colour filters N Check fuse F2 Check lamp Check lamp stab PCB and fuse F1 located there for Pictochrom CL for Pictochrom GRADE CONTRAST D f 1 _ m NO PC ____ FC _ GRADE AUTOSCAN Press the Light key The lamp and fan go on The filters swing t
38. TOP Press Reset key TU 8008 CO Measure a L level at V29 11 Correct N Replace V10 Check path V10 to V29 Set mode selector to stop SSTEP once Measure a H level at V29 11 Correct N Replace V29 Check path Measure H levels at V29 19 16 Correct N Replace V29 III 2 3 6 88 Mode selector to AD STOP Press the test key SSTEP once TU 8008 00 Measure H levels at V29 19 16 15 12 9 6 5 2 Correct N Replace V29 Set mode selector to stop SSTEP once Measure L levels at V29 19 16 15 12 9 6 5 2 N Replace V29 Set ad switches to 8000 Set mode selector to AD STOP SSTEP until TU displays 8000 40 Mode selector to stop Measure H levels at V12 11 Correct N Replace V12 Measure a L level at V13 collector Correct N Replace V13 SSTEP once Measure a L level at V12 11 Correct N Replace V12 Measure the collector voltage of V13 V gt 4 7 V Correct N Replace V13 Mode selector to AD STOP SSTEP once TU 8000 80 Measure a H level at V12 11 Correct N Replace V12 III 2 3 7 89 Measure a L level at V13 C and V14 C Correct N Replace V13 V14 SSTEP twice TU 8000 10 Mode selector to stop SSTEP once Measure a L level at V12 3 Correct N Replace V12 Measure the voltage at V15 collector V gt 4 7 V Correct N Replace V15 Mode s
39. The three 001 bits show which filter is in white light position or which microswitch is being activated LER This test is used for checking the Closed Loop System s precision A filtration is given The unit filters the light and makes a should be as is comparison to have exact light stea dily The values in the 3rd LCD display line go against 0 0 3 that means the filters are adjusted to the densi tometric value and the deviation LER is displayed This helps to check if the Closed Loop system recognises co lour changes if it corrects them and adjusts deviations Press White light Press Light Press softkey LER Display shows Input the values command values in the table with the help of the numerical keyboard and the Y M C filter keys and check 3 LCD line Test with a colormeter I 1 5 16 40 TEST 16 CL H Eteff TV y m c 0070 0070 0000 001 96 0 95 9 96 1 MSC YMC LER Variable display values possible YEL MAG CYAN 000 000 000 30 30 00 60 60 00 90 90 00 130 130 00 155 155 00 00 00 30 00 00 60 00 00 90 00 00 130 00 00 130 30 00 130 60 00 130 90 00 130 130 00 130 00 30 30 00 60 30 00 90 30 00 130 30 00 170 30 The above mentioned values are to be input As the filters adjust themselves the values in the third LCD line go to 000 0 0 3 in each case These values give the loop error LER The maximum permissible loop error LER is 0 3 If there are bigge
40. am Fit mixing box 450 press light and YMC J keys Using trimmers adjust Y M C 4 V white light on Picto colour sensor PCB under enlarger head so that they correspond to the measuring values noted Switch off enlarger and replace enlarger head I 2 2 4 63 Exchanging the shutter motor I 2 2 5 64 1 Remove lens plate 37 via screws 38 2 Remove plug 39 3 Remove securing disk 40 and withdraw shutter blade 41 4 Release screws 42 and take out holding plate 43 with motor 44 5 Then release screws 45 and detach cables from motor 44 6 Remove light insulation 46 and glue onto new motor 44 7 Fit new motor and re assemble Section Il VCNA feature for Pictochrom and Pictochrom AF Factor Potentiometer PCB replacement and calibration A correct adjustment of this potentiometer is important for a good and exact work with the Pictochrom AF The potentiometer is used to stabilize the correct color head position for calculation of exposure times and for slope compensations Procedure Open cover 1 by loosing screws 2 The Factor Pot PCB 3 and the factor potentiometer 4 are located on the right side Calibration Enter into the test program by closing the Dipfix switch S2 on the Microcontroller PCB Power on Enter into the tes
41. and connection to Picto keyboard PCB Measure 5 V on X32 13 Correct N Check 5 V supply Check the data bus on step 3 Each step of the test program can be selected directly by entering the numerical step number and pressing the softkey lt TEST To exit this test step press exit The display returns to the initial characters TEST 00 The timer display goes to 0 00 Correct N Check R15 R16 C3 contact cable Check data bus supplies on test 3 Check the I O components V2 on Picto keyboard display PCB The display shows The LCD lines 2 4 are loaded with U and lying H In the right hand corner the Eprom version of the display is shown Should all characters be missing check the data supplies They can be checked in test 3 Correct N Check display Check grounding of display Check flat cable for display To exit from the test step press exit key TEST 2 The display shows TEST 02 KEYBOARD SWITCHES The keyboard is switched like a matrix STO PRINT Each key connection is in a row horizontal to one EXIT column vertical When the exit key is pressed the next step of the test program is selected KEY CODE WORD S1 0 DIGIT 0 S orotorotororor S2 1 DIGIT 1 S3 2 DIGIT 2 a Ie B jaf 6 8 5 B S4 3 DIGIT 3 S5 4 DIGIT 4 S6 5 DIGIT 5 E ALAALA ST 6 DIGIT 6 a fal 318 a AG SB 7 DIGIT 7 sg 8 DIGIT 8 S10 9 DIGIT 9 tet sit RE
42. annel 0 Press lens up and Select key If channel 0 is programmed and the potentiometer has been calibrated the lens stage focuses as follows 9 times random position 1 time focus position 2 1 Processor keyboard display PCB All measuring takes place on the processor keyboard display PCB Connect the Z 80 TU Address switches to 8000 Mode selector to AD STOP Power on TU 8000 and RD LED on Correct N Go to II 2 3 Check data display FF Correct N Check for short or wrong key Check V11 Measure a L level at V11 1 Correct Y Go to III 2 1 2 N Measure all levels at V10 1 Correct N Replace V5 Check path Measure a L level at V10 2 3 13 14 Correct N Check address lines Replace V10 IN 2 1 1 Measure a L level at V9 6 8 11 Correct N Replace V9 Check paths Set the address switches to 8003 Press Reset key Measure the levels at V9 Pn6 L 8 H 11 H Correct N Check V9 Press the following keys on this PCB Key Data 11 size head adj up F7 12 rapid Fb S13 size head adj down Fd Correct N Check V11 Check keys Set the address switches to 8005 Press Reset key The TU shows 8005 FF Measure the levels at V9 Pin6 H 8 L 11 H Correct N Check V9 Check paths Press the following keys on this PCB Key Data S1 EF S7 F7 S8 CH lens Fb Correct N Check V11
43. annels Usable focal lengths Resolution of the positioning system Reproducibility of lens position Range of positive variator PV Range of negative variator NV IN 1 1 3 70 approx 8 2 cm sec approx 6 mm sec approx 7 2 mm sec approx 1 2 mm sec 10 0 9 50 to 150 mm 180 0 01 mm 0 02 mm 999 99 mm 1 Digit 1 mm 99 99 mm 1 Digit 0 05 mm 1 2 Power on cycle IH 1 2 71 When the enlarger is switched on the lens carrier moves upwards to the mechanical stop Depending on the lens channel selected and the height of the enlarger head the lens carrier moves to the focus position The setup program of the basic equipment is identical to that of the manual enlarger If this position is not found please check whether the channel corresponds to the lens in use whether an error message appears on the control channel Err 6 Err 7 whether stored values have been lost whether RAM memory can not detect the top and bottom positions The potentiometer value of these two positions must be re stored see page III 3 0 1 3 Error messages to AF feature Err 6 Err 7 IH 1 3 72 These error messages refer only to the AF unit and are displayed on the control unit AF 2000 Mot only Cause Attempt to use more than 30 reference points for auto focus programming or the memory channels have been overwritten by interference Remedy Press Enter Cancel all points as
44. arrier and light box 3 Remove enlarger head 4 Release screws 35 pull off top guide sleeve 36 and exchange 5 Remove locking screw 37 6 Loosen grub screw 38 and remove right hand column 34 downwards Then exchange bottom guide sleeve 39 in the same way as the upper sleeve 36 Caution The friction spring 27 may only be tightened with the screws 26 enough to hold the loaded lens carrier stationary in any desired position Excessive tighte ning of the friction spring 27 leads to premature wear of the sliding pads friction shafts and column groove Exchanging the column sleeves top left hand lens column 40 The top left hand lens column sleeve 41 cannot be exchanged The sleeve has been pressed into place and subsequently countersunk 1 Retensioning the sleeve 41 is effected by means of a grub screw 42 secured by a locknut 43 2 Release locknut 43 and tighten grub screw 42 3 Then re secure with the locknut 43 I 2 1 6 57 Exchanging the column sleeves bottom left 1 Lower enlarger head to its bottom position hand lens column 40 2 Remove locking knob 37 completely thus releasing lens carrier 44 3 Unscrew friction spring 27 Remove friction shaft 28 and simultaneously withdraw lens carriage 45 downwards together with right hand column 34 4
45. ck all ICs Measure a signal of 2 45 MHz period 0 4 us at V4 6 Correct N Check V1 V2 Power off Connect the Z 80 TU Set the mode selector to stop Power on Press and release the reset key The TU displays 000 00 Correct N Go to III 2 3 9 Check the control LEDs MEM M1 RD WR ON ON ON OFF Correct N Check if corresponding control path is shorted Replace V4 Press and hold the Reset key The TU must display FFFF FF Correct N Go to III 2 3 9 Hold the Reset key Check if all control LEDs are off MEM M1 RD WR OFF OFF OFF OFF N Check if corresponding path is shorted Replace V3 HI 2 3 1 83 Release the Reset key Press SSTEP and compare 0001 21 MEM M1 RD 0002 55 MEM RD 0003 55 MEM RD 0004 7E MEM MI RD Correct N Go to II 2 3 11 SSTEP once The TU must display 555 XX XX any hex number Correct N Check if address bus lines are interrupted Go to III 2 3 12 Measure the levels at RAM Eprom V7 1 2 3 4 5 67 8 19 22 23 LH LHL HLH H L H V6 2 23 26 H L L Correct N Check if address lines are shorted or interrupted Press SSTEP key 5 times TU must display AAAA XX X does not care Correct N Go to II 2 3 11 Measure the levels at RAM Eprom V7 1 23 4 5 67 8 19 22 23 HLHLHLH LLH L V6 2 23 26 L H H Correct N Check if address bus lines are interrupted HI 2 3 2 84 Press and hold the
46. ctor 5x f 8 Efficiency n factor 5x f 8 Illumination C factor 5x f 11 Centre corners 4 corners Connections Closed Loop system Maximum error after lamp change Cold warm drift Repeatability Colour distribution Filters Maximum filter density Density diaphragm in 2 steps step 1 step 2 Exposure time Gradation range Gradation steps Paper channels Film channels I 1 1 2 100 110 220 240 V 50 60 Hz 10 15 approx 500W 15 C up to 30 C 5 95 250W 24V approx 50 h E 4 8 Lux box 450 E 33 0 Lux box 35 n 5 3 Im kW box 450 C 1 max 20 C 2 max 5 Roll paper easel Matrix printer Measuring probe 0 025 D at gamma 1 for positives 0 015 D at gamma 1 for negatives 0 01 D at gamma 1 and constant room temperature 0 008 D at gamma 1 C 0 025 D at gamma 1 Pictochrom and Pictochrom 130 densitometric units 1 3D adjustable in steps of 0 001 D Pictograph 130 Y and 170 M 0 30 D 0 60 D 0 5 999 sec 0 5 0 1 10 units 30 0 29 No paper channel by Pictochrom 9 1 8 only on Pictograph Feature of the Pictochrom CL Pictograph Design concept I 1 1 3 The Pictochrom CL is an improved version of Laborator 1200 and Colikit 1201 Its advantages are the following Motorised filter setting Closed Loop system VCNA mode only version The colour enlarger Pictochrom CL has been equipped with Closed Loop regulating sys
47. ddress paths HI 2 3 9 91 Measure H levels at these ICs on the power control interface PCB V14 11 V17 1 19 V19 1 19 Correct N Replace V5 Check A15 A14 lines Shorted data line Replace V14 V17 V19 on power control interface PCB Replace V11 V12 V28 V29 on the processor PCB III 2 3 10 92 Press and release the Reset key Measure a H level at V7 18 Correct N Check V1 V8 V5 Measure a H level at V4 25 Correct N Check if corresponding path is shorted grounded Replace V4 Measure a H level at V4 18 Correct N Check for shorted pin Replace V4 Measure a L level at V6 20 Correct N Check V5 Check for shorted address and data lines Replace V4 and V6 IH 2 3 11 93 Shorted address data lines 515 412 A11 A8 AT A4 A3 A0 D7 D4 E Ll Ll _ Ja i il Each digit in the TU displays the state of four address and data lines respectively As the Z 80 has 16 address and 8 data lines the TU needs 4 digits to read the address bus and 2 digits to read the data bus Each half byte 4 bits is represented as a hexadecimal number Consequently the first digit on the TU starting left shows the logic states of address lines A15 A12 the second one shows them from A8 to A11 and so on See also III 6 0 IH 2 3 12 94 Set the address switches to C000 Set the mode selector to A
48. durst PICTOCHROM CL PICTOCHROM PICTOCHROM AF PICTOGRAPH PICTOGRAPH AF Service manual 2 2nd EDITION version 2 1 PICTOCHROM CL PICTOCHROM PICTOCHROM AF PICTOGRAPH PICTOGRAPH AF These units basically having the same technical construction and outfit are all contained in this new second edition service manual Notice This service manual has been edited in Mai 1996 Updated to version 2 1 in November 1998 Utmost care was taken to ensure a flawless manual we are however most grateful for all suggestions for improvement or correction For your suggestions please use the enclosed reply letter The service manual order code number is SM01320 REPLY LETTER We d like to receive your comments on this repair manual Please answer the questions and return this form to DURST PHOTOTECHNIK AG att Service Department Service manual for unit O 1 Version U 2 Version U 3 Version Version Have you found any mistakes Which Did this manual help you to find an error cause What was the mistake What was the solution Have you suggestions concerning the completion of the manual Which topics should be added SERVICE MANUAL This manual is divided into 4 sections Concerns the enlarger VCNA feature for Pictochrom and Pictochrom AF AF Control Autofocus mechanism for Pictochrom AF and Pictograph AF
49. e of 005 on the testing probe in line 1 A Place a neutral density filter 2 over the measuring cell and note value B The following difference in density D1 must result A 005 B approx 205 Using the diaphragm set a value of 190 on the testing probe A Place a neutral density filter 2 over the measuring cell and note value B The following difference in density D2 must result A 190 B approx 390 The difference between the two densities D2 D1 may not exceed 3 Note If the linearity error is greater the 1 10 range switching of the probe must be checked The switching point is at a density of D 130 change over voltage value 0 4 V 4 0 V Check the auto offset TEST 11 Check V5 and periferic components on micro controller PCB Checking the mechanical light chopper Using light box 35 expose the probe to approx 100 LUX Press and release probe measuring key No error message should occur ERROR 5 OFFSET PROBE OUT OF RANGE Causes 1 If a lot of light is present the mechanical chopper does not completely darken the photo diode Use exit key to return to normal program Switch enlarger off Check for mechanical jamming 2 If light is off Auto offset values test 11 Offset outside tolerance test 11 64 400 or Offset of measuring probe outside range 01 650 3rd LCD line Readjust Offset balance again if necessary V5 on microcontroller PCB may be defective test 11
50. e the H level at P2 Correct N Adjust R64 Check V27 V37 Hold the head up key Measure the pulses at V23 5 Correct N Check V25 Check V24 V20 Replace V23 Press and hold the head up key Measure a h level at V26 4 Correct Y Check V37 V38 R55 Measure a H level at V17 11 Correct Y Check V19 V26 Check V17 HI 3 4 3 Press and hold the head up key Measure a L level at V26 3 Correct Y Check V40 V41 Release the head up key Measure a H level at V26 3 Correct Y Check R57 V41 Press and hold the head up key Measure a L level at V17 10 Correct Y Check V19 V26 Check V17 MI 3 4 4 124 3 5 The head moves only at high speed or low speed is not correct and can not be adjusted PI T l 100 pi ms 25 P3 1 8 ms 4 500 ps 20 The head moves only at low speed Measure a H level at R8 Correct N Go to III 3 6 1 Press and hold the head up and rapid keys Measure a L level at R8 Correct N Go to III 3 6 1 Press and hold the head up and rapid keys Measure a H level at V10 8 Correct N Check V10 Press and hold the head up and rapid keys Measure the pulses at P1 Compare with the wave form as per diagram Correct N Check V20 Measure the time delay of 500 msec between the trigger pulse at P1 and
51. ective This message appears also if the unit was just program med the memory can not be overwritten To solve this failure message go to test 10 and initialise the RAM Then return to this step test 9 I 1 5 11 35 TEST RAM BATTERY O K EXIT TEST 10 TEST 10 RAM FUNCT INIZIALISAT WARNING CHANNEL DATA WILL BE LOST DEFAULT RS232 PARAMETER WILL BE SET START EXIT TEST 10 RAM FUNCTION O K WARNING AUTO OFFSET cancelled Start AUTO OFFSET A D conv TEST 11 The display shows RAM BATTERY OK If not replace the RAM The display shows With the softkey J START the initialisation can be started All the memory will be lost Attention The auto offset values on test 11 will be cancelled Press Start key until the following message is displayed The serial interface is initialised to 1200 BAUD Hd Shake DTR DSR If a matrix printer is connected but has not been adjus ted to the above parameters the correct parameters must be set via the program SETUP INSTALL RS232C Note After the RS232C parameters have been set it is absolutely essential to switch the Picto off briefly and then on again to initialise the parameters The initialisation of the RAM memory is necessary if the RAM is replaced a new Eprom version is mounted there are repairs to the microcontroller PCB and the data have not been saved by a PC the program has been blocked due to extreme
52. elector to AD STOP SSTEP once TU 8000 20 SSTEP once Check displays V17 and V19 Both must be on 8 Correct N Replace bad display Check shunted LEDs and displays SSTEP twice Check displays V16 and V18 Both must be on 8 Correct N Replace bad display SSTEP 4 times All LEDs are lit except V25 Correct N Replace bad LED Mode selector to stop Press Reset SSTEP until the TU shows 0003 55 Measure levels at plug X1 10 12 13 14 15 16 17 18 N Interrupted data paths The Microprocessor hardware is fully operational HI 2 3 8 90 Check a H level at V12 1 N Check if reset line is shorted Press and hold the Reset key Measure a L level at V12 1 N Check if reset path is shorted or interrupted Release the Reset key Check for a H level at V7 18 N Check for a H level at V5 14 Correct Y Check V1 V8 N Check V5 Check for a L level at V6 20 N Check the levels atV5 1 2 4 6 L LLH Correct Y Replace V5 N Replace V4 Check for open path Power off Remove V6 V7 from their resp sockets Power on Press and hold the Reset key On TU address display appears FFFF N Check for grounded paths Replace V4 V9 On TU data display appears FF N Go to III 2 3 10 Release the Reset key On TU display appears 0000 FF N Check for shorted paths Replace V4 Replace V6 V7 Check for interrupted a
53. est program MODE SELECTOR SWITCH IN RUN POSITION 9 The program being executed is stopped immediately and the order just being processed will be displayed MODE SELECTOR SWITCH IN A STOP POSITION 9 The program will be stopped only if the micro processor s address matches the address selected with the STOP ADDRESS 10 priority select switch STEP KEY 11 By pressing this key just one machine cycle will be executed as long as the mode selector switch is in the STOP position In the A STOP position a program cycle will be run down until the selected address is reached again Section IV Kermit Data Saving on PC Storing data on a floppy disk or hard disk of a personal The memory dump function allows you to store all data computer Memory dump function paper channel offset job memories etc to a floppy disk or to the hard disk of the Personal Computer This back up file can be loaded back into yhe enlarger if necessary Personal Computer with DOS operating system Required items Data transfer program i e KERMIT RS 232 C Interface cable as illustrated The RS 232 C parameters on all Pictochrom and Picto raph are set to 2400 Baud 7 Databit no parity 2 Stopbit 1 SE lA Bio i 1 CONFIGURATION RS232 F 2 ho ae al s5so o sla P a a 6j 8 8 1 EARTH 4 RTS 2 TXD 5 CST 20 20 3 RXD 7 GND Connect the interface cable on the serial interface
54. eter limit values from the register and polls counter V16 V18 for actual colour head position to determine the necessary lens displacement 2 sec The programming values are determined during a pro gramming session performed by the operator The ope rator selects a channel and focuses the lens manually at 5 or 6 different head positions see operator manual table The microprocessor stores the number of pulses which occur during each focusing operation Once the session is over all intermediate points are approximated by a curve Note The head limit positions are stored in two registers inside the RAM bee LS displacement If the contents of the registers are lost reprogramming becomes necessary see factor potentiometer calibra tion section III point 1 5 Otherwise the unit can not operate Programming is effected via the AF control unit on the power control column Selection of the lens channel variations of the negative and positive variator NV PV is done via the power control column Motor head adjustment and the function film change position can be activated from the operating console of Pictochrom and Pictograph The Light and Expose keys as well as the functions Tim and FST are no longer present MI 1 1 2 69 Technical data Adjustment speed Head fast Head slow Lens carrier fast Lens carrier slow Lens ch
55. follows Press AF setup twice Press Enter once Press Clear simultaneously and reprogram the autofocus Cause Error in the autofocus system The lens carrier move ment is blocked The count pulses in the unit are missing or are not recognised The pulse sequence is too slow or the channel is interrupted Remedy Press Enter twice No result Re initialise the unit Check the motor control Cause The RAM has lost all values Remedy Re initialise the unit section III 1 4 Then re program Note If after programming the enlarger does not move to focus positions without an error message appearing re initialise the enlarger and read in length of column page III 3 0 1 4 Initialisation IN 1 4 73 The RAM memory of the AF unit can be re initialised by simultaneously pressing the keys Enter and Lens adj ww and Bil and subsequently switching the enlarger on All values stored are erased during this procedure All stored values for the lens channels and the column reference values will be lost Before re programming the focus go through the following procedure Action 1 Press and hold the Enter key Power up 2 Press Enter 3 Press the AF setup and Enter keys simulta neously 4 Move head to lowest position Press Enter 5 Move head to highest position Press Enter 6 Power off to exit Purpose Entry into
56. g 4 with the 7 segment l display at full illumination When it is dark 0 V can be measured This signal serves to regulate the brightness of the 7 segment displays V7IC CA signal I 1 4 12 21 For the display illumination the following signals must 5 therefore be measured N On V8 emitter at full illumination strength Fig 5 and 5 V when dark YGE To regulate the brightness of the 7 segment display and 6 the timer display a pulsed signal as shown in Fig 6 is T y G used k v x33 1 a At full illumination see Fig 6 and when completely dark 0 V can be measured on X33 1 Correct N Check R4 Check V5 V8 V7 V17 Check Deskill Check display The keyboard can be checked in test 2 The following components are concerned V1 V2 V3 V4 V9 Component plan Picto Keyboard PCB MA4820A 0Z I 1 4 13 22 PICTO MICROCONTROLLER PCB AC4830A B D AC4830 A Version used only in Pictochrom CL 1 Eprom B Version used only in Pictograph 2 Eproms motor control circuit for measuring probe chopper D Version used in Pictograph and Pictochrom
57. he following voltages are to be measured against PO 24 V 1 V on X15 11 5 V 40 15 V on X16 6 The following signals are to be checked Oscillator signal on V2 16 This is a saw tooth signal with a cycle duration of 40 70 us and is generated by R3 and C3 see Fig 1 Correct N Check R3 C3 V2 Synchronisation signal on V2 1 lt a 8 r This is square wave signal with a cycle duration of 40 70 us and serves to synchronise the step motor control module L297 see Fig 2 Correct N Check V2 V7 V10 On R20 R21 V2 15 a reference voltage of 1 35 V 0 06 V must be measurable It is generated by the voltage dividers R20 R21 Go to test 15 in the test program The speed is controlled by the and keys Press to activate fast speed Press to activate slow speed Check direction of rotation and speed of Y motor with B Y keys Check direction of rotation and speed of M motor with G M keys Check direction of rotation and speed of C motor with R C keys Swing in density blades individually with numerical keys 1 3 and 6 I 1 4 4 13 1 DF 00 3 DF 30 6 DF 60 The lamp is also switched on or off via the motor control PCB Lamp On Signal Must be 0 V to allow the lamp to burn It is controlled via V14 and V18 Standby Signal Goes to H level X13 2 when exposure is triggered This signal is controlled via V14 and V17 Should t
58. he lamp still not function check UL 4501 PCB Component plan AC4835A 0Z Picto Motor Control PCB a aa Fu s x wif sp yp yaa pa i D ae 3 0 a p p p RI U _ 3 Si Re FS RE S a 4m r a r Eg co bs ry RAP El er ra rai g i N Rus LI a e Og vz vr v10 cat gt va 5 ve 67 a Rs en T i i T Ris Ee i b a 4 d ats D zus H o0 vo a Cre Durst eleotronies var PICTO MOTOR CONTROL POE AC 48 354 14 Correct N Check keys data lines V13 V14 V15 Correct N Check data lines test 3 Check V14 and V18 Standby signal x13 2 expose time Correct N Check data lines test 3 Check V14 and V17 LAMP EST UL 4501 PCB 1872650 Check the following voltages on X19 IMPORTANT Measuring instruments must be earth free 32 V AC on 6 7 8a against 3a 0 V 24 V AC on 5 46 against 3a 0 V 5 V DC must be measurable on X19 2b 2a against PO on motor control PCB Standby Signal X19 1a approaches 0 V when enlarger is switched on preheat voltage Opto electronic coupler OK2 on EST PC
59. hows The timer display shows the following cycle sss gt 555 gt o o o IH n Hn gt 8 8 8 gt 222 gt 000 5 5 5 gt 22 2 I 1 5 7 31 TEST 5 TEST 05 PRESS SIMULATOR KEYS EXP START START LEDs EXP END RANGE READY ON EXIT TEST 6 TEST 06 MOTOR CONTROL LOGIC CHECK V1 V8 V9 V14 Q7 55 AA DATA CHANGE f 1 Hz f 50 KHz PULSE 0 0005 ms EXIT I 1 5 8 All measurements must be done on the Picto keyboard display PCB If no display is functioning check the contrast control on Picto keyboard PCB The 3 7 segment displays V11 V13 V15 are selected through V10 V12 V14 1 If only one segment is not working check the select line display 1 2 or 3 and V4 check the corresponding IC V10 V12 or V14 check R17 R18 or R19 replace V11 V13 or V15 If only one LED simultaneously on all displays is 2 not working check data path If only one LED on one display is not working 3 check V10 V12 or V14 check R19 R18 or R17 replace V11 V13 or V15 The display shows This test step can be done only with the aid of a simulator and is effected only at the factory Go to the next step The display shows This step is used to check the motor control PCB Via the data bus the data 55 and data AA are sent with a frequency of 1 Hz With the clock signal of 50 KHz data are switched to the motors In this step the filter motors make one step forwards and
60. ignal at V6 3 Y673 He 3 6 ms fms Correct N Go to III 2 4 4 Measure the frequency at V15 1 1 2 MHz N Check V5 clock line HI 2 4 1 97 Measure the signal at V15 3 v 5 3 GD I u I il 3 6 ms ims amp 1 2 MHz Correct N Check V15 Measure the signal at V15 1 v16 1 ll P U I 3 6 ms T ms x 1 2 MHz Correct N Go to III 2 4 6 ENTRY 1 Power off Disconnect lens motor plug X6 Connect the Z 80 test unit Address switches 800C Set mode selector to run TU Power on Press Test key TU Set mode selector to AD STOP TU Press the Enter key The TU shows 800C 00 Press SSTEP twice TU The TU shows 800C 01 Measure the frequencies at V16 V18 V1 6 3 4 5 6 11 10 9 8 period 1 67 3 3 66 13 3 26 6 53 3 10 6 31 3 usec V18 11 10 9 8 3 4 period 0 43 0 85 1 7 34 68 13 6 ms II 2 4 2 98 Correct N The clear CL input pin 2 12 must be at L level If it is H replace V5 Otherwise replace bad counter V16 of V18 SSTEP once TU shows 800C 03 Measure a H level at V16 18 2 Correct N Check V5 Measure L levels at V16 V18 3 10 Correct N Check V16 V18 Address switches 8010 Press Reset key Measure L level at V19 1 19 Correct N Go
61. in max auto offset values of 01 320 or 64 400 for Pictograph are exceeded OFFSET voltage of one of the following OPs V3 V5 V22 on microcontroller PCB exceeds the tolerance 10mV The RAM memory must be initialised see test 10 in the following cases if the RAM has been exchanged if a new Eprom version has been fitted if repairs have been carried out to the microcontroller PCB make sure data has been saved to a PC if the program has been locked by exceptionally high line disturbances and if switching the enlarger on and off does not help if you unplug keyboard colour head probe or roll box under power During RAM initialisation in test 10 offset values are erased In this case reset values test 11 This error is displayed when the enlarger is switched on if the head is not connected or if the three micro switches Y sw M sw C sw can not register the white light position Switching the enlarger on moves the three colour filters to the white light position ERROR 5 ERROR 5 OFFSET PROBE OUT OF RANGE call customer service TEST 19 No light Switch power off and replace lamp Loop error Switch power off and replace lamp Lamp defect Lamp positioned correctly I 1 3 2 Cause Microswitches or microcontroller PCB V37 faulty go to test 3 in the test program Filter wheel has become mechanically jammed motors out of order or motor control PCB defective
62. isk cams must be correctly adjusted if in doubt carry out test 15 1 4 Descriptions of PCBs Picto power supply PCB Motor control PCB Lamp EST UL 4501 PCB old version Lamp EST UL 4501 PCB new version Colour signal PCB Picto probe PCB Picto keyboard PCB Picto microcontroller PCB PICTOCHROM CL I 1 4 1 10 AC4845A AC4835A 1872650 AL4830A MA4820A AC4830A PICTOCHROM AC4845A AC4835A 1872650 MC48201 AL4830A MB4821A MA4820A AC4830D PICTOGRAPH AC4845A AC4835A 1872650 MC48201 AL4831A MB4820A MA4820A AC4830B or D B version can be replaced by D version new PCB MC4820A compatible as from series A9009 Pictochrom A9400 Pictochrom AF Pictograph AF PICTO POWER SUPPLY PCB AC4845A The following voltages must be present Measure voltages relative to PO P4 25 DCV 1V This voltage is required for activating the filter motors and for the density shutter motors P3 12 DCV 0 6 V All components connected to the measuring system are supplied with current on 12 V All C MOS components are supplied with 12 V current On colour signal PCB Probe On microcontroller PCB P2 12 DCV 0 6 V The 12 V are used for generating the reference voltage 0 3 V for the operation amplifier of the measuring system This 0 3 V will be found on the colour signal PCB in the probe and on the microcontroller PCB where it is generated
63. j J and lens adj T simultaneously Power up Switch the unit on and off Power off Purpose All the memory will be lost On the display appears E Adjusting the factor potentiometer Action Press and hold the Enter key Power on Press Enter key once Press the keys AF setup and Enter simultaneously HI 5 0 1 Purpose Entry into test program Exit from keyboard test The display shows a number except 0 Entry into factor calibration procedure The NV LED turns on Action Purpose Move the head to lowest The lowest head position position value is stored Press Enter key PV LED turns on NV LED turns off Move the head to highest The highest head position position value is stored Press Enter key The PV LED turns off Power off Re program the lenses following the users manual Enter the TP press and hold Enter key and power on Select calibration values mode by pressing Enter key twice test program steps Display test Control interface test calibration values The display shows now the max factor poti value All data can be read in the following sequence IH 5 0 2 136 Factor poti values The display shows PO while pressing and holding display select key Index number Description 0 Factor poti value maximum Press key The display shows P1 Index number Description 1 Factor poti val
64. justment of the filters to the mecha nical position can be checked Input filter values using the numerical keyboard and the Y M C filter keys switch on the light and check the filter settings in the 3rd LCD line When filter move to setting filtration the count values on the 3 LCD line count to zero 0 2 If a filter moves undefinably to and from without loca ting in a fixed position check the following Measuring cells Filter wheels for mechanical jamming Spring on filter wheel for dislocation audible rattling The display shows Interface output RS 232 can be checked for resistance to faulty data transfer via a dummy plug Enter the main program via 001 SETUP INSTALL RS232 Select RS232C and set Handshake signal to XON XOFF via and key If necessary correct Baud Then return to test program and attach bridging plug 2 TxD AT Yor Polat slater 3 AXD 4 RTS 1 J 5 C5T I 1 5 19 43 TEST 17 RS 232C TRANSMISSION The test can be started via the Start Transmission key The QUICK Brown Fox Jumps Over The Dog Total ____ Eror ____ Ber ____ The display shows STOP EXIT Total registers the state of the signals sent The number of errors occurring can be checked via Error The cycle can be interrupted by means of the Stop key If problems on the enlarger with transmission occur check the following Correct connection cable F1
65. l functions involve a change to the microcontroller PCB The software has been exchanged The hardware of the PCB has been supplemented by the addition of components V35 and V36 Holding the keys on the operating console down measure the following signals at V35 relative PO on the microcontroller PCB film change position V35 2 H 4 L up V35 4 H 4 L rapid V35 6 H 4 L down V35 8 H 4 L N Check keys Check data bus test 3 on Picto TP Check V44 V35 V36 Ailic Interface The following inputs on the Ailic interface PCB are assigned X1a 7 up key X1a 8 rapid key X1a 9 down key X1a 3 F ch position key The following signals must appear when the keys are held down Up V1 8 relative PO HL rapid V1 6 HEE down V1 4 H 4 L F ch pos V1 17 H 4 L V1 receives the release signal via inputs 1G and 2G Now the functions controlled from the operating console can be sent straight to the data bus of the AF 2000 unit IN 3 1 1 112 Power off Connect the Z 80 on V4 AF 2000 unit Address switches to 8030 Mode selector to AD STOP Power on On TU display appears 8030 FF RD LED on Press following keys on Picto keyboard and check data display Key TU data up F7 rapid Fb down Fd F ch pos 7F N Check for correct connection on AF 2000 unit Check 5 V on V1 20 IN 3 1 2 113 3 2 The head stage can not be moved at
66. ly high mains disturbances if it can not be solved by powering on off if you unplug keyboard colour head probe or roll box under voltage I 1 5 12 TEST 11 TEST 11 AUTO OFFSET A D CONV WARNING PRESS HELP KEY ERR2 ERR2 ERR2 ERR2 ERR2 ERR2 ERR2 ERR2 START EXIT TEST 11 AUTO OFFSET A D CONV WARNING PRESS HELP KEY 0260 0231 0221 0227 0243 0228 0240 0228 START Variable display values possible EXIT TEST 12 TEST 12 FOTOMETER MODE 0 Clear LOG SIGNALS Keys Factor A D 3 LCD line VCNA part see section II The display shows If the RAM has been newly initialised via test 10 offset values will be erased In this test step the offset values of the colour and density input amplifiers on the microcontroller PCB can be read in anew via software Unplug colour head and measuring probe connectors X21 and X3 not under power on Erase old offset values with Clear key 3rd LCD line goes blank Press Start key In the third line of the LCD display eight values between 01 and 320 appear for Pictochrom CL For the Pictograph values of 64 400 apply Due to the amplification change over of 1 16 from V22 on the microcontroller PCB there are two offset values each per colour and density Y Low Y High M Low M High C Low C High D Low D High If the min max values of 01 320 are exceeded ERR 2 is displayed In this case the offset voltage of
67. n Ref 2 and Ref 1 should be the same as the calculated difference of the Lva values Section III AF control Autofocus mechanism for Pictochrom AF and Pictograph AF Contents 2 1 2 2 2 3 2 4 2 5 IH 1 0 67 Introduction to AF feature System characteristics specifications and tolerances Power on cycle Error messages to AF feature Initialisation Factor potentiometer replacement and calibration Test program Processor keyboard display PCB Power supply Processor PCB Power control interface PCB Lens movement failure Head movement failure Motor control 24V PCB description Autofocus memory check Z80 Test unit 1 Introduction to AF feature 1 1 System characteristics specifications and tolerances Design concept Operation description The instructions given here refer exclusively to the autofocus control All instructions referring to the enlarger will be found in the Pictochrom Pictochrom and Pictograph repair section SECTION J The autofocus control consists of the AF 2000 Mot former Elite 2000 Mot integrated in the power control column This control unit is the one already used in the L1200 and M 805 AF The microprocessor of the Pictochrom Pictograph and the AF unit work independently of each other The Z 80 CPU is used in the AF unit The Pictochrom AF and Pictograph AF are micro processor controlled autofocus systems The autofocus system uses a potenti
68. ng signals can be checked Filter limit switch Roll paper easel inputs Probe The data bus supplies can also be checked On the microcontroller PCB there are the following components which correspond to each other V40 V41 V42 on keyboard display PCB V2 V1 All 8 characters 0 or 1 correspond to the 8 data lines DO D7 TEST 4 ABCDEFGH 7 SEGMENT DISPLAY EXIT aa The first 3 numbers show the position of the colour filter limit switches If they are activated filter out the characters go to 1 The last 4 characters refer to the roll paper easel connection A Microswitch Y B Microswitch M C Microswitch C D n c E Shutter open roll paper easel F Focus on roll paper easel G Exp start roll paper easel H Start probe If an input of V37 is connected against O V the follo wing message appears in Display 1 on the correspon ding output Disconnect X5 MSB 00000000 on microcontroller PCB Connect start signal against 0 V X3 4 MSB 00000001 on display Exp start roll paper X4 3b MSB 00000010 Foc on roll paper X4 1b MSB 00000100 Shut open roll paper X4 3a MSB 00001000 Display illumination and Deskill switch off C limit switch X5 3 MSB 00100000 M limit switch X5 2 MSB 01000000 Y limit switch X5 1 MSB 10000000 Correct N Check V40 V41 V42 on microcontroller PCB Check V2 V1 on keyboard display PCB The display s
69. o the set filtration values Closed loop problems Initialisation of the enlarger can be started from test 10 in the test program I 1 2 2 for Pictograph N Check RAM battery Go to test 9 in the test program N Check keyboard on test 3 Go to Picto keyboard PCB Check lamp stab PCB and fuse F1 on it N Check measure cells Go to tests 15 16 in the test program Check the filter motors Go to tests 15 16 in the test program N Check lamp Check lamp socket Check lamp voltage Go to test 16 in the test program 1 3 Error messages ERROR 1 ERROR 1 RAM memory defect switch the power OFF and ON to check if RAM really defect call customer service ERROR 2 TEST 11 AUTO OFFSET A D CONV WARNING PRESS HELP KEY ERR2 ERR2 ERR2 ERR2 ERR2 ERR2 ERR2 ERR2 START EXIT ERROR 4 ERROR 4 Color Head not connected or W light error Call customer service I 1 3 1 This error message appears automatically in CL operation when internal software code words do no longer correspond In the operation test program this error is only displayed if test 9 is selected Cause Extremely high glitches also caused by antistatic devices Internal lithium RAM battery dead When exchanging RAM re initialise the enlarger test 10 and activate auto offset test 11 ERROR 2 only appears in the test program on the third LCD display line of test 11 AUTO OFFSET A D CONVERTER Cause The m
70. ometer for feedback information about the colour heads vertical position The potentiometer resistance determines the duty cycle of monoflop V6 on the power control interface PCB During this duty cycle 3 6 ms pulses of 1 2 MHz frequency are counted into binary counters V16 and V18 The duration of the duty cycle varies with the colour heads height and thereby the number of pulses counted by V16 and V18 Thus A D conversion takes place The microprocessor calculates the necessary lens displacement according to the programmed values It activates the lens motor thru V13 V14 IF PCB and V2 V1 on the lens motor board PCB The lens motor is a 30VDC motor Thus a feedback beco mes necessary to determine the real lens displacement An optical disc in connection with an opto sensor V9 supplies the necessary pulses via V2 V7 to the power control PCB IN 1 1 1 68 The microcontroller switches the pulses via the NAND Gates V15 to binary counter V16 and V18 The lens reference position is determined after power ens on The lens motor is activated and pulls the lens standard up to the stop position Once the limit is reached the optical disc stops supplying pulses The microprocessor waits for approx 2 seconds If no pulses ul occur during this lapse the position is taken for the upper lens limit position ref position lens down The microprocessor fetches the programming values the power onal potentiom
71. one of the OPs V3 V5 V22 on the microcontroller PCB exceeds the permissible tolerance 10 mV These values can not be adjusted Check the OPs with the peripheral components Then connect colour head and probe again The display shows In this test the measured values for the individual filters can be checked The filters cannot however be adjusted Applicable only in connection with simulator Test step only carried out at the factory I 1 5 13 37 TEST 13 TEST 13 FOTOMETER LIN ERROR 1 PRESS 9V KEY HOLD Clear EXIT 2 KEEP PRESSING 45mV HOLD Y M C D r TEST 14 TEST 14 FULL STEPS DAUERTEST FILTERSTEUERUNG MSC Y M C 5000 EXIT TEST 15 TEST 15 STEP COUNTER FOTOMETER 1 2 6 RESET EXIT KEYS L D B Y G M C R 0 Clear Y M C DF The display shows The purpose of this test is to check the amplification change over This requires a simulator which is only used at our factory Go to next test step The display shows Beginning with 5000 counts backwards in ones after each cycle All three filters Y M C are simultaneously moved in and out from 0 to 210 in steps of 30 This enables the filter motor control to be checked Via this test step motors and motor control elements can be checked The CLK signal for Y M C must be H controlled via microcontroller PCB V25 V32 The display shows Test 15 enables the filter motors and
72. one step backwards at a time Thus the motor control component V2 V7 V10 L297 and V3 V6 V11 L298 can be checked The motors can be checked better on TEST 8 Density shutter check on TEST 7 TEST 7 TEST 07 DENS 30 60 SHUTTER LAMP FAN ON OFF WITH 1 Hz EXIT I 1 5 9 33 The display shows Swing in both shutters simultaneously Lamp on Chopper in probe also swings in and out This step is used to check the density control the lamp and the fan FAN ON OFF Not visible as the starting time for the fan is too short Density V14 11 On the motor control PCB must be the following clock signal Cik 3E W141 Correct N Check V32 on the microcontrol PCB Check cable Check R25 V14 The data bus must be working you can check it via test 3 Drive density shutter V13 V15 determine the turning direction in or out Shutter At the motor the following signal must be displayed Shutter Shutter 12Y in M 9 0 7s t 0 25 9 Shutter 12 out TEST 8 MOTOR TEST HEAD SWCT COL M C FULL 1 1 1 EXIT The shutter is controlled by V14 V16 V15 is used to control the turning direction Correct N Check R14 R15 R16 R17 Check for a good connection on the shutter plug Lamp on off Correct N Check the lamp fuse F2 The lamp is switched on off by V18 on the motor control PCB With the L signal the lamp goes on
73. opyright C Trustees of Columbia University 1982 1990 Type or HELP for help MS DOS Kermit 3 0 initialization file Smile MS Kermit gt set speed 2400 MS Kermit gt transmit Picto RAM IV 0 5 144 Activate memory dump function on the enlarger Activate the data transfer program on the PC If the data transfer program is loaded in a sub directory change first the directory and then start the program The screen indicates the program version number and the Copyright note Input the data transfer speed and press key Enter Input transmit Picto RAM Note Do not press Enter first start the data transfer program at the enlarger TEST 18 TRANSMIT RECEIVE RAM DATA Start the data transfer program at the enlarger by TO FROM A PC pressing Receive Byte TRANSMIT RECEIVE EXIT Press the key Receive Pa Press the Enter key at the Personal Computer within 8sec to start the data transfer Note When exceeding the 8sec the enlarger return to the normal mode Restart the data transfer program as mentioned above TEST 18 TRANSMIT RECEIVE RAM DATA The counter in the enlarger display counts down the TO FROM A PC received bytes transfer time approx 3min Stop key ____ Byte stops the data transfer TRANSMIT RECEIVE EXIT When counter shows 0 all datas have been transfered to the enlarger D MS Kermit gt exit exit a Close the data transfer program at the PC press the Enter
74. orrect N Check V5 Interrupted path IH 2 3 4 86 Set mode selector to AD STOP Set mode selector to stop TU 800 20 SSTEP once Measure a L level on V12 6 Correct N Replace V12 Check for interrupted data lines Measure the voltage at V14 collector N Replace V14 Set the mode selector to AD STOP SSTEP once Measure a H level at V12 6 Correct N Replace V12 Check V14 collector V OV N Replace V14 Set ad switches to 8004 Mode selector to AD STOP Press Reset The TU displays 8004 FF WR MEM LED on Measure H levels at V28 18 17 14 13 8 7 4 3 Correct N Check for interrupted paths Check a L level at V28 11 Correct N Replace V10 Check for open path Set mode selector to stop SSTEP once Measure a H level on V28 11 Correct N Replace V10 Check for open path HI 2 3 5 87 Measure H levels at V28 19 16 15 12 9 6 5 2 Correct N Replace V28 Press and release Reset Measure H levels at V28 19 16 15 12 9 6 5 2 Correct N Replace V28 Set mode selector to AD STOP Press the test key SSTEP once TU 8004 00 Measure L levels at V28 18 17 14 13 8 7 4 3 Correct N Interrupted paths Set mode selector to stop SSTEP once Measure L levels at V29 19 16 15 12 9 6 5 2 Correct N Replace V28 Address 8008 Mode selector to AD S
75. outlet RS232 and on the Personal Computer RS 232 C outlet IV 0 1 140 Data transfer from enlarger to the PC Enter test program test 18 see section I 1 5 Activate memory dump function on the enlarger TEST 18 TRANSMIT RECEIVE RAM DATA The enlarger is now ready to receive send data TO FROM A PC ___ Byte TRANSMIT RECEIVE EXIT Kermit A Activate the data transfer program on the PC C KERMIT gt kermit If the data transfer program is loaded in IBM PC MS Kermit 3 00 16 Jan 1990 a sub directory change first the Copyright C Trustees of Columbia University 1982 1990 directory and then start the program The screen indicates the program Type or HELP for help version number and the Copyright note MS DOS Kermit 3 0 initialization file Smile MS Kermit gt set speed 2400 pa Input the data transfer speed and file name where the data will be stored log session Picto RAM A i e Picto RAM is the file name input connect to start the program connect C KERMIT gt kermit IBM PC MS Kermit 3 00 16 Jan 1990 Copyright C Trustees of Columbia University 1982 1990 Type or HELP for help MS DOS Kermit 3 0 initialization file Smile MS Kermit gt set speed 2400 MS Kermit gt log session Picto RAM MS Kermit gt connect IV 0 2 141 The PC is ready to receive data Esc chr D help D port 1 speed 2400 parity none echo rem VT320 TEST 18 TRANSMIT RECEIVE RAM DATA S
76. ox 1600 Correct N GotoII 2 4 Move head to highest position approx 9130 Tol 20 Correct N Go to II 2 4 Press the Select key The display shows the counter value of the encoder 0 Check the lens stage movement Press Action Lens y Lens stage speed 0 5 mm sec downwards Lens T Lens stage speed 0 5 mm sec upwards Lens J and Lens stage speed 6 5 mm sec downwards Lens T and Lens stage speed 6 5 mm sec upwards Correct N Go to HI 2 5 1 Move the lens stage upwards until it stops reference position 2 Press the Select key twice to zero the counter 3 Move the lens stage downwards until the counter shows about 4000 important don t use up key 4 Note this number N1 5 Move the lens stage to its upper position The new number shown by the display is N 2x N1 Correct N Go to II 2 5 IH 2 0 2 77 B Entry into continuous test program 1 C Entry into continuous test program 2 IH 2 0 3 78 The hardware is fully operational For correct operation of the automatic focusing system the potentiometer values must have been initialised 3 0 Press and hold Enter key Power on Press the lens up and down keys simultaneously Lens stage moves down for 30 mm Stops Moves up to ref position Power off to exit test program 1 Power on with Enter key pressed Move head to the first focusing position of ch
77. r divergencies and fluctuations check the following points Closed loop error check whether the lamp is defective or incorrectly inserted If this error message occurs when the lamp is neither defective nor incorrectly inserted the control circuit is not functioning Possible faults Offset error of A D converter see test 11 Offset error of colour signal PCB Adjustment see Picto colour signal PCB A D converter defective see test 12 13 The disk cams of the filter wheels must be correct if in doubt carry out test 15 YMC Via YMC the measuring cells can be checked for correct operation YMC gives the measured values of the proportions of light I 1 5 17 41 PICTOCHROM CL PICTOCHROM TEST 16 CL H Eteff TV y m c 0070 0050 0000 001 115 3 95 2 45 0 MSC YMC LER Variable display values possible PICTOGRAPH TEST 16 CL H Eteff TV y m c 0129 0000 0030 001 4175 7 46 7 77 7 MSC YMC LER Variable display values possible TEST 16 CL H Eteff TV y m c 0000 0170 0030 001 50 8 220 9 81 0 MSC YMC LER Variable display values possible So the correct calculation of the variable display values possible measuring values will be checked for example amplification change Press White light Press Light Press YMC softkey 4 Start off with the filter value that indicates 0 Input the following filter values Y 70 M 50 C 0 Check measured actual values in
78. ross V41 Correct N Go to III 3 3 3 ENTRY 1 Press and hold the head down key Measure O V at V38 Correct N Go to III 3 3 4 Release the head down key Measure 8 2 V across V38 Correct I1 3 3 1 N Go to III 3 3 4 Press and hold the head down key Measure 24 V at V27 collector Correct Y Check V37 V42 V47 V48 Measure a L level on V25 3 Correct Y Check V25 V27 Check V19 V21 V25 HI 3 3 2 118 v on k 15 ms 1 4 ms lt 23 13 4 1 8 ms 25 ENTRY 1 Press and hold the head down key Measure the signal at V10 1 Correct Y Check V10 V25 Press and hold the head down key Measure a H level at P2 N Adjust R64 Check V27 V37 Hold the head down key Measure the pulses at V23 13 Correct N Check V25 Check V24 V20 Replace V23 Press and hold the head down key Measure a H level at V26 3 Correct Y Check V40 V41 R57 Measure a H level at V17 10 Correct Y Check V19 V26 Check V17 HI 3 3 3 Press and hold the head down key Measure a L level at V26 4 Correct Y Check V37 V38 R55 Release the head down key Measure a H level at V26 4 Correct Y Check R55 V38 Press and hold the head down key Measure a L level at V17 11 Correct Y Check V19
79. rotection filters I 2 2 3 62 1 Open enlarger head 2 Release holding plate 4 via screws 5 3 Remove support plate 15 by releasing screws 16 and spacing bolts 17 4 Release securing disk 26 and remove density blades 27 5 To do this the colour filter holders 6 7 must be released and removed via the securing disk 8 6 Then the filter motors 28 can be removed via screws 29 Before exchanging these components the measuring values in the test program should be noted Proceed as follows Enter test 15 in test program and swing out all density blades with key 1 Go from test 15 to test 16 and press light key Make sure that mixing box 450 is fitted Input filter settings Y 000 M 000 C 000 and press YMC key J The values to be noted appear in the 3rd LCD line Switch enlarger off again Exchanging the heat protection filters under the lamp Open enlarger head mounting Release holding plate 4 via screws 5 Heat protection filter can be exchanged a igs Exchanging the heat protection filters under the Remove negative carrier and mixing box mixing box Remove enlarger head Remove light box holder 31 by opening the screws 32 Carefully remove the heat protection filter 33 and plate 34 via screws 35 circular diffusion rods may fall out Exchange heat protection filter 36 Then return to test 16 in the test progr
80. rrupted path Hold the head up key Check for H level at V26 9 Correct III 3 6 4 130 N Check V3 path Check V25 Release the key and measure again L level N Measure a L level at V3 2 Correct N Replace V26 Press and hold head up key Measure again H level N Replace V26 Check path Check V3 V18 LED III 3 6 5 131 4 Motor control 24 volt PCB Functional description Decoding stage It consists of V3 V10 V26 The commands UP DOWN and FAST are low active The inputs LIMIT SWITCH UP and DOWN are high active The limit switches are closed when the head is not in the end position Thus in the inactive state the limit switches connect these inputs to ground The NAND GATES V3 c and V3 d decode the inputs Down Up Limit sw up Limit sw down V3 10 V3 11 v10 13 v10 11 v10 3 V10 5 V26 c is an EX OR gate If both the up and down com mands are active output pin 10 goes to L level and stops the commands Pulse generator Astable multi vibrator V20 produces pulses pin 3 and a sawtooth pin 6 The sawtooth is compared to the feed back voltage available at V24 1 via V24 d The duty cycle at V10 2 is proportional to the feedback voltage Depending on the selected function up or down either V25 3 or V25 4 follows this frequency and switches transistor V29 V27 A larger load means a higher voltage at V24 1 and a longer du
81. s 1 DF 00 00 0 00 0 00 0 0 2 Press 3 DF 30 30 0 30 0 30 0 4 0 Press 6 DF 60 60 0 60 0 60 0 4 0 Press 1 DF 00 00 0 00 0 00 0 0 5 Checking the mechanical filter adjustment checking the cams Adjust counters with L and D and check the follo wing table Press 0 before adjusting each counter Counter Difference values 00 0 0 60 16 40 120 18 40 180 18 40 240 18 40 300 18 40 360 18 40 420 18 40 460 10 30 Check absolute measured values with Clear key These must be within the range of 200 260 I 1 5 15 39 TEST 16 TEST 16 CL H Eteff TV y m c 001 MSC 0070 0070 0000 YMC TEST 16 CL H Eteff TV y m c 001 MSC 0070 0070 0000 001 001 YMC When adjusting 10 steps on a counter for colour filter difference value may be within the range 1 5 8 0 Press 0 before each adjustment Check absolute measured values with Clear key 1 Zero all counters with the L key to give all measured values 39 0 10 0 2a Set M counter to 460 with M key Measured value gt 225 0 2b Set M counter to 00 with G key Measured value 39 0 10 0 3 Set Y counter to 460 with Y key Measured value gt 200 0 4 Set C counter to 460 with C key Measured value gt 220 0 The display shows With test 16 the Closed Loop system can be checked Checks can be carried out via LER Loop error YMC Measuring cells MSC Filters mechanical position
82. sequence which is controlled by the microprocessor the Exp end signal is sent back to the roll paper easel Exp end signal 0 5 s The Exp end signal is an acknowledgement signal from the enlarger to the roll paper easel This signal can be measured via the microprocessor V25 V38 and K1 on microcontroller PCB on X4 2b or X4 2a The signal jumps briefly from O V towards 5 V H active This signal causes the processor of the roll paper easel to start the exposure procedure and the paper feed cycle If problems with the enlarger occur test 3 in the test program can be used In other cases the roll paper easel must be tested separately Operating instructions for connecting roll paper easel 1 When working with a Papermot burning in is only possible in combination with manual operation Reason When automatic operation is selected paper feed is triggered after every exposure 2 White light is automatically activated when roll paper easel is set to Focus on 3 Please remember in connection with the roll paper easel that the console illumination is not switched off when the shutter opens If however the roll paper easel is to send a control signal to switch off the console lighting before the shutter opens this signal can be effective as Shut open signal 4 Multiple exposures are not possible with roll paper easel and autoprint The cassette would jam Set Autoprint to OFF in option mode Note
83. ss switches 800C Mode selector AD STOP Power on Measure a L level at V14 11 power control interface PCB Correct N Go to III 2 5 4 Mode selector to stop SSTEP once Measure a H level at V14 11 Correct N Replace V10 Check S OUT path Mode selector to AD STOP SSTEP until the TU displays 800C OA SSTEP once The TU still shows 800C OA Measure a H level at V13 2 Correct N Replace V14 Check D3 line path from V13 to V14 Press Reset TU shows 800C 00 SSTEP once Measure a L level at V13 2 Correct N Replace V14 Check D3 path Measure a L level at V13 16 Correct N Replace V13 Check V13 V14 V9 D4 path IH 2 5 3 107 IN 2 5 4 108 All ICs are located on the processor keyboard display PCB Measure the levels at V10 12 3 13 14 L LL H H N Check address paths Replace V9 V10 Replace WR line AF module test Y15779 VI5 11 Press and hold the Enter key Power on Press Enter key Press Select key Press the up or down key and the key All measurements take place on the power control interface PCB Measure the signal at V15 9 Correct N Go to III 2 5 6 Measure at V15 11 Correct N Check V15 Go to III 2 4 2 ENTRY 1 to check counter V16 V18 HI 2 5 5
84. t position Important Lock head with adjustment knob 2 Release screws 5 and remove hood 6 3 Remove negative carrier and light box 4 Hook special tool 7 into spring 8 Caution Take the necessary care when tensioning and releasing the spring 5 Pull special tool 7 and spring 8 downwards Slowly release the spring 6 Release screws 9 remove cap 10 and exchange spring bracket When inserting new spring check that it is well secured 7 Balance counterweights in such a way that the enlarger head can be adjusted smoothly 1 Release screws 5 and remove hood 6 see Fig 3 2 Tighten grub screws 12 until the brake operates as required 3 Replace hood 6 Page new added in November 1998 updated 08 2005 Exchanging the coupling brake lever Exchanging the rubber clutch and drive pinion Illustration A Illustration C A Raise enlarger head to its highest position 1 Remove the covering 1 by loosen the screws 2 2 Remove also the 3 screws 5 and the cover plate 4 3 Unscrew and remove the screw and the washer 3 4 Remove than the 2 screws 9 and the angle 10 5 Now beat out the spring dowel sleeves 15 16 see illustration for their location 6 Screw a M2 screw 12 into the axle 14 and pull out both parts and the bushing 13 with the aid of a pincers Attention Don t loose the parts 17 21 7 Replace now the broken lever 6
85. t step 12 by pressing 12 on the numerical keyboard and confirm it with softkey TEST The display shows TEST 12 FOTOMETER MODE Move color head to the lowest position with the LOG SIGNALS Keys 0 Clear Size Head adjust keys on the Elite console Factor A D Y M C D Attention remove the two limit rubber stoppers II 1 1 65 Adjustment of factor potentiometer 4 II 1 2 66 The potentiometer is located on the right side of the transport carrier Measure on the factor potentiometer between pin 2 and 3 and turn axle to obtain 450 Q 100 e Move color head to the position REF 2 of e 1082 mm 0 5 see drawing Note the L value on the display 3 LCD line as L max e Move color head to the position REF 1 of e 192 mm 0 5 see drawing Note the L value on the display 3 LCD line as L ofr Calculation Of L maxnew Lmaxnew Lmax Lmax Loff 890 x Lmax Loff Note value Lmaxnew e Move color head back to the position REF 2 e 1082 mm and adjust the trimmer R5 on the Factor Pot PCB to obtain on the display L L maxnew e Move color head back to the position REF 1 e 192 mm and adjust the trimmer R3 on the Factor Pot PCB to obtain on the display L 400 Check Read L value Lva 1 on position Ref 1 Read L value Lva 2 on position Ref 2 Lval 2 Lval 1 890 1 The difference 890 between positio
86. tart the data transfer program at the enlarger by TO FROM A PC pressing Transmit All data RAM copy will be _ Byte transfered to the PC and stored in the file Picto RAM on TRANSMIT RECEIVE EXIT the hard disk Press the key Transmit The counter in the enlarger display indicates the transfered byte 34343434343456565656565656568787878782334545656657667676 Esc chr D help D port 1 speed 2400 parity none echo rem VT320 TEST 18 TRANSMIT RECEIVE RAM DATA The transfered bytes are counted down Approx after TO FROM A PC 3 1 2 min the value reaches zero that means all datas ____ Byte are saved Press stop to close the connection TRANSMIT RECEIVE EXIT Ctrl e Close the data transfer program el e Press Ctrl and simultaneously close session a exit A IV 0 3 142 MS Kermit gt close section Closing Session log MS Kermit gt exit C KERMIT gt IV 0 4 143 Data transfer from PC to enlarger Enter test program test 18 see section I 1 5 TEST 18 TRANSMIT RECEIVE RAM DATA TO FROM A PC ____ Byte TRANSMIT RECEIVE EXIT Ls Kermit C KERMIT gt kermit IBM PC MS Kermit 3 00 16 Jan 1990 Copyright C Trustees of Columbia University 1982 1990 Type or HELP for help MS DOS Kermit 3 0 initialization file Smile MS Kermit gt a transmit Picto RAM set speed 2400 Lu C KERMIT gt kermit IBM PC MS Kermit 3 00 16 Jan 1990 C
87. tem During exposure light is measured by sensors in the light mirror box as primary colours red blue and green and then regulated by the microprocessor The Pictograph the B W enlarger for variable contrast paper also uses the Closed Loop system with colour sensors for blue and green In processing B W contrast paper consistent light quality is also important undesirable variations in gradation or changes in density can be avoided New LCD display The bellows extension range has been increased Reductions are thus possible without the extension tube attention with AF version Built in shutter for short exposure times important when doing repeat printing 3 additional light boxes can be used Pictobox 450 standard Pictobox 67 accessory Pictobox 35 accessory Pictobox 550 accessory 7 lenses can be used Interchangeable lens holder round lens panel for all available lenses 50 180 mm for easy control of lens aperture setting Connection for a roll paper easel Attached sensor probe With the Pictograph the contrast is measured by a sensor probe and the necessary contrast grade and exposure time is determined automatically Each measuring result can be adjusted and corrected at any time With the Pictochrom the density can be measured by a sensor probe and the necessary exposure time is determined automatically Each measuring result can be adjusted and corrected at any time 1 2 Power on cycle SETUP
88. test program Exit from keyboard test The unit displays a number except 0 Entry into factor calibra tion procedure The NV LED turns on Lowest head position value is stored The PV LED turns on Highest head position value is stored The PV LED turns off This procedure initialises the head limit position registers The potentiometer values in highest and lowest head position are stored in the RAM This obviates a precise mechanical adjustment 1 5 Factor potentiometer replacement and calibration Replacement 1 Move head to lowest position 2 Remove screws 1 and cover 2 3 Attention Block the enlarger head mechanically it might speed upwards 4 Install new potentiometer on support plate 4 Turn axle clockwise to stop 5 Turn axle counterclockwise for 1 2 revolution 6 Fix potentiometer 7 Re assemble in reverse order Calibration Action 1 Press and hold the Enter key Power up 2 Press Enter 3 Press the AF setup and Enter keys simulta neously 4 Move head to lowest position Press Enter 5 Move head to highest position Press Enter 6 Power off to exit TH 1 5 1 74 Purpose Entry into test program Exit from keyboard test The unit displays a number except 0 Entry into factor calibra tion procedure The NV LED turns on Lowest head position value is stored The PV LED
89. the filter disk cams to be checked Check lamp Switch on lamp via light key Measure voltage on lamp socket terminal X49 Lamp on 23 5 V 0 2 V RMS Lamp off 5V 1V TRUE RMS The lamp is controlled by the microprocessor via V32 on the microcontroller PCB CLK 3E signal X14 4 The control signal passes via data line D1 to V14 and transistor V18 to the motor control in EST 4501 PCB The lamp is protected by fuse F2 12 A at the plug input Speed of filter adjustment is controlled via the and keys rapid adjustment fine adjustment Check direction of rotation and speed of the Y motor with the B Y keys I 1 5 14 38 Check direction of rotation and speed of the M motor with the G M keys Check direction of rotation and speed of the C motor with the R C keys All three colour filters can be adjusted simultaneously with the L D keys Activate L key until Y M C values are at zero Density filters 30 and 60 can be checked with the help of the numerical keys 1 3 and 6 Press Clear The display shows The base value 39 0 can differ up to 10 0 Measured values tolerance 10 This value depends on the characteristics of the lamp reflector If this value is different from 39 in the normal program the effective exposure time has a bigger differences to the set exposure time Cause light deviations caused by the lamp will be compensated by the exposure time Pres
90. to III 2 4 7 Address switches 8020 Press Reset key Measure L level at V17 1 19 Correct N Go to III 2 4 8 Replace V17 V19 III 2 4 3 99 All measuring takes place on the power control inter face PCB Power off Connect the Z 80 TU Set mode selector to AD STOP Address switches 800C Power on Measure L level at V6 2 Correct N Reset cycle not correct bad V22 C15 Replace V14 SSTEP twice Measure the H level at V6 2 Correct N Go to III 2 4 5 SSTEP once Measure 5 V at V6 6 Correct N Check R6 factor pot connection V6 Check C6 C5 V6 III 2 4 4 100 III 2 4 5 101 All measuring takes place on the power control inter face PCB Measure L level at V14 11 Correct N Replace V10 V9 V5 on the processor PCB Set mode selector to stop SSTEP once Measure a H level at V14 11 Correct N Replace V10 processor PCB Check S out path Replace V14 Check paths Check V6 V5 Measure a H level at V15 5 Correct N Replace V14 Check path from V14 2 to V15 5 Check V5 V15 Check D1 data line Check V5 V4 V15 HI 2 4 6 102 All the following ICs are located on the processor PCB Measure the levels atV10 1 2 3 L HL Correct Y Replace V10 Check SIN 2 path Check the levels atV5 1 2 3 4 6 L HL LH Correct N Check paths Replace V5 Check paths II 2 4 7 103 All the following
91. ty cycle at V10 2 III 4 0 1 132 If the fast key is pressed the pulses are suppressed via V10 d and replaced by a steady H level Thereby the motor receives full power instead of a pulsed signal V24 c is a time delay circuit to avoid a sudden voltage increase at the motor inputs Load feedback At slow speed the load condition is measured and translated into a proportional pulse to the power drivers Across R53 down and R49 up the driving pulses are available Their amplitude decreases if the motor load increases as the voltage drop across R68 R69 increases as well and less voltage reaches the motor The pulses charge C19 via digital switches V23 a up or V23 b down Capacitor C19 charges up to a voltage proportional to the pulse amplitude At pin 7 of buffer V24 b the same voltage appears V24 a compares the desired speed pin 3 to the feedback actual speed The desired speed is adjusted via R46 The voltage available at V24 1 is therefore proportional to the difference between desired and actual speed Via digital switches V23 a b the feedback is synchro nised to the control pulses monostable V15 activates these switches to this purpose To achieve a high efficiency slow speed regulation the motor speed is pulse controlled The period of these pulses is sufficiently short to guarantee smooth motion The bridge configuration allows movement in both directions without the need of a d
92. ual supply voltage III 4 0 2 133 Overload protection An electronic fuse protects motor and power stage from overload and short circuit The voltage drop across R68 R69 is proportional to the motor lead Part of this voltage drop reaches transistor V36 If it exceeds 0 7 volts V36 V37 become conductive and trigger flip flop V21 c d Pin 13 of V24 is forced to L level Consequently V10 2 stays at L level and the driving transistors are disacti vated The motor current is interrupted Flip flop V21 is reset by astable V20 If the short circuit condition persists the flip flop V21 is set again IH 4 0 3 134 5 Autofocus memory check MA6036P 1Z Pictochrom AF Pictograph AF This software allows you to control the stored autofocus values and factor potentiometer values with the aid of the test program AF unit This is to check about lost datas cause of autofocus failures A new function calibration values has been added in the test program For the Pictochrom graph units in addition it is now possible to start the mechanical stress test by pressing up and down keys on the Picto AF Keyboard simultaneously By a new installation of software After EPROM inserting the following must be performed e RAM initialisation e Factor poti adjustment e Lens channel re programming with the users manual RAM initialisation Action Press and hold keys enter lens ad
93. ue minimum Note All other index numbers are insignificant Lens calibration values Index Description no 0 Enlarger head position first position scale 1 Enlarger lens position first position scale 2 Enlarger head position second position scale 3 Enlarger lens position second position scale L 58 Enlarger head position thirty position scale 59 Enlarger lens position thirty position scale Note A maximum of 30 position scales is possible Generally only the first 6 or 7 position scales are used all others 0 How to show the calibration values Note Of all indicated datas a note must be made So they can be compared resp controlled again in a future time e With the and key the index no can be decreased resp increased By holding depressed the key the actual index number appears in the display The Display select key shows the actual index and channel number when kept depressed When the and keys are pressed simulta neously the index no returns to 0 e Select the needed lens channel with the channel key Every key pressure increases the channel number in this sequence P 0 1 2 9 P P Factor poti values 0 9 Lens calibration values I1 5 0 3 137 6 The Z 80 Test Unit Test unit description Under normal conditions the microprocessor system s program sequence will be executed within 1 to 4 us However since the order s effectiveness depends upon
94. ve to PO on the microcontroller PCB P1 for yellow measuring cell P2 for magenta measuring cell P3 for cyan measuring cell OFFSET adjustment Remove the colour head and position it with the fan turned upwards Disconnect lamp loosen lamp base Cover head with black cloth to keep measuring cells in light box darkened Adjust P1 yellow with R3 Adjust P2 magenta with R9 Adjust P3 cyan with R15 toOV 0 2 mV If the offset voltage should prove unstable or no longer be adjustable check cable to microcontroller PCB or exchange corresponding operation amplifier V1 V2 V3 on colour signal PCB I 1 4 9 18 Amplification adjustment Amplification adjustment has been factory set with a test lamp but if resetting is necessary proceed as follows Connect lamp and switch on Insert mixing box 450 Switch on white light press W light Adjust P1 yellow with R4 Adjust P2 magenta with R10 Adjust P3 cyan with R16 to 4V 0 04V Component plan Picto Color Signal PCB AL4830A 0Z AL4831A 0Z C2 CE T ae az C R3 RI
95. w bolt 55 and re assemble in reverse order 1 Raise enlarger head to its maximum height 2 Remove negative carrier and light box 3 Release screws 58 and remove lamina 59 4 After releasing the screws 60 at the top and bottom ends of the bellows fold bellows 61 and remove it 5 Fit bellows frame 62 to new bellows 61 and secure the latter in place once more I 2 1 8 59 Exchanging the colour filters I 2 2 60 1 Open enlarger head Take off hood 1 cover 2 and front plate 3 2 Release holding plate 4 via screws 5 3 Release and remove Y 6 and C 7 filter holders via securing disk 8 and M filter holder via securing ring 10 4 Insert colour filters 11 12 13 by raising securing spring 14 1 Exchanging the colour filter motors 1 Open enlarger head 2 Release holding plate 4 via screws 5 3 Remove support plate 15 by releasing screws 16 and spacing bolts 17 4 Release motors 18 from disk cams 19 by opening grub screws 20 5 Unscrew motors 18 via screws 21 and unplug from insert plate 1 Release screws 22 and remove stop bracket 23 2 Then remove microswitches 24 via screws 25 I 2 2 2 61 Exchanging the density filter motors Exchanging the heat p

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