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ESQ1 service manual

1. upon request 4 Intermittent Start up problems The purpose of this circuit modification is to eliminate intermittent start up problems such as a scrambled or blank display display or loss of sequencer and or sound data This update should be performed on any metal or plastic ESQ 1 exhibiting this problem and having a serial number less than 25449 ESQ Service Manual Plastic 27 NOTE the crystal Y1 is an SIU crystal SIU is clearly printed on one side it must be replaced Contact ENSONIQ Customer Service for a replacement crystal A Remove all cables including the Power cable from the ESQ 1 Remove the four 4 screws that OW DIGITAL GROUND BUS fasten the control panel and raise the control panel Remove the keyboard as described in Section D ESQ 1 Plastic Do not remove the Main board from the unit Locate U1 741504 Directly across from pin 1 of U1 scrape the solder mask coating from an area about 1 4 inch square on the digital ground bus see Figure 9 Tack solder a 470pf capacitor between pin 1 of U1 and the scraped area of the ground bus Temporarily reconnect the Power cable J11 and the Display cable J4 and test for proper start up BEFORE replacing the keyboard and shield Replace the keyboard as described in Section D ESQ 1 Plastic Power up test the unit and close the control panel NOTE IF U 1 74LS04 ISA SIGNETICS OR NATIONAL SEMICONDUCTOR 1 DO NOT INSTALL THIS CAPACITOR PL
2. MeN oe nare vaso oa ma trove Aowenber 4 2 0415 04110471 5 2S CAND AN ISi NOILOSS 9 66 254511195 69 62 Ls sapag ranah lt S viy m phy 6 84 wee utd sere leew vous t 280 5 0 1 050 por te Jeo 53 v0 2 13 4 ja noem S IOHLINOOD TANVd LNOHd Figure 1 ESQ 1 Front Panel Controls ESQ SERVICE MANUAL SECTION 1 Metal and Plastic INTERNAL MEMORY A given ESQ 1 is likely to have Program and or Sequence data in its internal memory that is near and dear to the owner of that unit In the event that it becomes necessary to re initialize the memory during repairs it is highly recommended that the internal memory both Programs and Sequences of the unit be saved before servicing For instructions on saving data to a Mirage via MIDI or tape see the ESQ 1 Musician s Manual a device with Sys Ex capabilities or MIDI disk drive see the Version 3 software update sheet ESQ 1 TEST PROCEDURE The following procedure will ensure the thorough testing of the ESQ 1 and will also aid in trouble shooting the unit To perform the following tests you will need a Cassette Tape Deck with a short MIDI cable a Foot Switch a Control Voltage CV Pedal and STC 8 2 Storage Cartridge The ESQ 1 should be connected in stereo to a sound system
3. METAL MAN 69910 8 INTRODUCTION As with every ENSONIQ product all ESQ 1 service will be handled through the ENSONIQ Module Exchange Program Rather than diagnose and exchange individual components you wilt replace complete modules We feel this is the most time and cost effective method of repair both for you and your customers The ESQ 1 Service manual is divided into four different sections and includes service information on both ESQ 1 Digital Wave Synthesizer and the ESQ M Digital Wave Synthesizer Module In April of 1987 ENSONIQ replaced the Metal Case of the 50 1 with a Plastic Case You can use the following criteria to determine which case is which STYLE SERIAL RANGE MAINBOARD ASSY DISTINGUISHING FEATURE METAL 10000 24999 40900004001 NO HEAT SINK ON BACK PLASTIC 25000 HIGHER 40900007001 HEAT SINK ON BACK There are no interchangeable parts between the metal and plastic ESQ 1 There is service information however that applies to both types of cases It is for this reason that you find sections of the manual dedicated to both the metal and plastic ESQ 1 Section 1 the metal 5 1 only Section 2 the plastic ESQ 1 only Section 3 and the ESQ M Section 4 TABLE OF CONTENTS Figure 5 1 Front Panel Controls METAL AND PLASTIC ESQ 1 Section 1 Internal rhemory ESQ 1 Test Procedure 1 Memory Protect Test Memory Backup Test Analog Input Test Sustain Jack Test Sequencer Jack T
4. The ESQ 1 is heavily software dependent and certain events can cause the unit to glitch and contract a severe case of amnesia Sometimes these units merely require re initialization see page 5 Step 14 Since scrambled software can cause problems that at first glance appear to be hardware related the use of correlation modules particularly known good Keypad and Display unit is strongly recommended the Keypad and Display are unknowns it can cause confusion in tracking down the problem If you do not have known good correlation modules and suspect a Display or Keypad problem you should test these modules first see Using Self Test Mode page 6 1 Memory Protect Test A While holding the RECORD button press the MASTER button The sign on message should appear Flip the Power Switch off and on 5 times allowing the sign on screen to be displayed each time Press the INTERNAL button Select each Bank and verify that Program names are not scrambled While in each Bank select any Program using the Soft buttons and play it to verify that the sound is not scrambled Press the SEQ button select a Sequence using the Soft buttons Press the CONTROL button select COUNTOFF and set it to CLICK Press PLAY and listen for the Metronome countoff click Allow the Sequence to play for a short time to verify that the Sequence data is not scrambled Press STOP CONT to stop the Sequence Failure to retain Internal Programs and Sequ
5. Out with a MIDI cable Hold down a few keys Disconnect one end of the MIDI cable When you release the keys the notes should sustain Play eight or more keys simultaneously to re initialize the voices Failure indicates a Main Board problem Re tnitialization of Unit The following procedure is not a normal part of the test and should only be performed in the event that the software becomes scrambled or if indicated as part of another procedure in this manual WARNING All sounds and sequences will be lost in the re initialization process Save any important data before re initializing 14 A B C D NOTE 15 While holding the RECORD button press Soft button 1 Display should read ERASE ALL MEMORY AND RE INITIALIZE Select YES The display will return to the sign on message All RAM is erased and all internal Programs reset When re initializing with 0 8 Version 2 2 or lower all internal programs will be reset to BRASS 7 Higher versions will load the forty factory sounds Tune the Filters see Filter Tune step 11 For units with O S version 2 2 and lower load internal Program Memory from STC 8 2 Storage Program Cartridge 1 Press the Storage button 2 Select the Soft button below CARTRIDGE 3 Select CART A TO INT 4 Select YES The data transfer takes about 2 seconds Re load the Internal Programs and Sequences via tape before beginning the test procedur
6. Program Cartridge Slot b Press Program Verify that all programs 001 120 can be selected by moving the Data Slider Return to Program Number 001 Press WRITE The display should read REPLACE EDIT PRG Press Up Arrow Yes d Move the Data Slider to change the first letter of the Program Name Press Scroll to move the cursor to the next letter in the Program Name and move the Data Slider to change the next letter e Press Scroll until the Program Number is flashing Move the Data Slider until the Program Number is 041 f Press Write The display should read WRITING PROGRAM then return with no errors g Remove the Test STC 8 cartridge Failure usually indicates a Main Board problem Check the Cartridge cable however to see that it is installed correctly stripe at pin 1 and that none of the connectors pins are offset or bent under See HARDWARE NOTES page 41 9 Memory Protect Test a Flip the Power Switch off and on 5 times allowing the sign on screen to be displayed each time b Turn the unit OFF and wait 10 seconds c Turn the unit ON and verify that the Internal Program Names Programs 001 to 040 are not scrambled by sequencing through them using the Up Arrow Down Arrow keys Failure to retain internal programs indicates a Main Board problem 10 Stereo Test a Press Param Press DCA then immediately press the 4 button b Press Scroll until the display reads DCA4 PAN LOC 08 Using the Data Slider move the
7. a recorder that has a tone control make sure it is in the flat position Lots of treble boost or cut will distort the pulse waveforms on the tape TAPE NOT STARTED ON LEADER TONE may mean the level is too low FATAL ERRORS DETECTED ALL INTERNAL PROGRAM RESET may mean the level is too high Generally the correct input level will fall in between the levels which yield the above messages you get the TAPE NOT STARTED ON LEADER message and you know that the tape was started on the tone then the level is too low If you then increase the level and get the FATAL ERRORS DETECTED ALL INTERNAL PROGRAMS RESET message the level is now too high Try a level between the two Of course the above messages may mean just what they say NOTE ESQ 1 s updated from version 1 X or 2 X O S to a version 3 X O S may experience loading problems Users may need to establish a higher volume level so they can load in their old data dumps ESO Service Manual Metal and Plastic 8 BATTERY LOW MESSAGE number of things could cause this message to appear when the unit is powered up WARNING BATTERY VOLTAGE IS LOW SAVE DATA AND CONSULT OWNERS MANUAL Sometimes the unit in question can wake up in a state of mild confusion and this message might appear Go to the Analog Test Page while holding Record press Compare Repeatedly press the soft button below READ The value next to BAT should read 000 If this is the case it usually in
8. after re inserting the EPROMs 4 Loose screws In some earlier metal units there have been instances of screws vibrating out of their holes Lock washers were installed at the factory on all screws that hold the Keyboard Display board and Keypad board in place If one of the Display or Keypad board screws works itself loose it could fall into the Main board and cause shorting First check to see that all screws are in place If one or more of the screws has worked itself loose it should be re installed with a lock washer A dab of medium strength LOCTITE or fingernail polish applied to the threads upon re insertion will help keep a loose screw in place ESQ Service Manual Metal 16 Intermittent Start up Problems The purpose of this circuit board modification is to eliminate intermittent start up problems such as no display and loss of sequencer and or sound data This update should be performed on any metal ESQ 1 exhibiting this problem with a serial number less than 25449 Important Note lf the Y1 crystal is SIU crystal SIU is clearly printed on one side it must be replaced Contact ENSONIQ Customer Service for a replacement crystal INSTALLATION PROCEDURE A Disconnect all cables from the ESQ 1 including the power cable Remove the four 4 screws that fasten the control panel and raise the panel B Remove the keyboard according to the instructions found in Section D ESQ 1 Metal C You should now have access to the main
9. cardboard insulator is now being installed between these two boards at the factory to prevent this problem If you suspect this shorting of the Keypad board is the problem install the insulator between the boards when re assembling the unit Leads from the switches the Keypad Board can be carefully trimmed to prevent this shorting problem Due to the risk of fracturing their more delicate solder joints however the leads from the jumpers on that board should not be trimmed 2 Loose Sequencer Expander The Sequencer Expander Cartridge may work its way loose and cause some of the pins to lose their contact with the connector This is true particularly in some earlier metal units This situation will definitely cause the ESQ 1 s memory to become scrambled and or erased and can create the appearance of a serious breakdown If the Sequencer Expander Cartridge appears to be loose apply a smail piece of double sided tape to the bottom of the cartridge re install it and press down so that the cartridge sticks firmly to the case The unit should be re initialized any time this cartridge has been removed and or inserted 3 Loose EPROMs On a few metal units the Operating System EPROMs U17 and U18 have come loose from their sockets This will obviously cause a total shutdown of the unit Again a small piece of double sided tape applied to the underside of the EPROMs upon re insertion should prevent this The unit should be re initialized
10. harness in place Disconnect the harness from the Main board from the Display board and from the Power Supply J2 Note that these connectors are keyed and have connector locks Carefully lift the Wheel Assembly out of the case 5 Disconnect the cable from the program cartridge paying particular attention to polarity 6 Connect the new wire harness to the Main board J4 J11 J12 to the Display board and to the Power Supply paying particular attention to the alignment of pins and connectors Reconnect the wire harness to the case using wire ties 7 Re attach the Wheel Assembly to the case using the four screws 8 Attach the Program Cartridge cable to the Main board and attach the drain wire to the heat sink of the Power supply 9 Power up test the unit and close the control panel ESQ Service Manual Plastic 32 IMPORTANT 6 Replacing the Line Filter Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Remove the three 3 wire tabs connected to the back of the Filter paying particular attention to polarity Remove the two 2 screws and nuts that secure the Filter to the case Note that there are lock washers on the inside only To replace the Line Filter first make sure that the foil shield is in place Install the new Line Filter from the outside of the case The foil shield should make contact with the bottom
11. labeled ESQ 1 120V and Power Supply labeled 4001005601 Transformer labeled ESQ 1 110V R 1450000301 115V and Power Supply labeled 4001004201 lf you suspect problem with the Power Supply and the labels the Transformer and Power Supply do not correspond to one of the above configurations contact the Ensoniq Customer Service Department for instructions NOTE Power Supplies labeled 4001005601 are to be used ONLY with Transformers labeled ESQ 1 120V To prevent improper combinations the Transformer and PC board are keyed Under no circumstances should you attempt to connect a Power Supply labeled 4001005601 to any other Transformer nor should you connect ESQ 1 120V Transformers to any other Power Supply Problems with over or under voltage will occur if improper combinations are used If you need to replace a Power Supply with a different number Power Supply you may also need to replace the Transformer as well and vice versa Back of Unit To Transf fi toe To Harness POWER SUPPLY BOARD To Display FIGURE 4 Power Supply Voltage Check points ESQ 1 Metal ESQ Service Manual Metal 14 The following chart lists the voltage ranges for proper operation of each supply fully loaded and the appropriate terminals to read across with the voltmeter refer to Figure 4 for terminal locations Designation Terminals Allowable range Units A B
12. or Super Glue Gel into the hole Install the screw tightening only until the sub assembly being attached is snug against the case Do not tighten the screws any further When the glue sets the screws will hold the sub assembly tightly in place 2 Failures when Writing to STC 8 E2PROM Storage Cartridges Getting a WRITE FAILED error message while trying to write to an STC 8 cartridge may be caused by Texas Instruments 74ALS244s in position U3 and U4 or Fairchild 74F139s date code 8645 in position U13 U15 and U19 If this is the case swap the main board 3 SQX 10s and SQX 20s ak number of different problems primarily sequencer related may occur if the SQX 10 SQX 20 Sequencer Expander Cartridge is not fully inserted When debugging a unit with a sequencer expander test the unit with the expander un plugged and see if this eliminates the problem If it does try reconnecting the expander making sure it is fully inserted new stiffer foam is now being used on the ESQ 1 Sequencer Expander Port cover that will not only prevent the SQX 10 or SQX 20 from coming loose but will also aid in its proper installation When installing a cartridge with the new foam it will be positively forced into its proper place If the cover does not sit flush with the rear panel of the ESQ 1 when it is replaced the cartridge has not been properly seated in its connector and should be re installed This new foam is white and is available from
13. the keyboard cavity Gently slide the keyboard toward the rear of the unit lowering the front of the keyboard as needed to clear the control panel mounting tabs Turn the unit upside down on a soft surface and replace the ten 10 screws that secure the keyboard to the case While replacing the metal shield if present feed the spade lug end of the ground wire through the opening in the shield Install the spade lug to the screw directly across from the opening on the shield Replace the remaining five screws that fasten down the metal shield Install the metal shield over the Main board and replace the six 6 screws fastening it to the case and keyboard frame Connect the Display cable Power cable and Pitch Mod Wheel cable to the Main board Power up test the unit and close the control panel Replacing the Power Supply Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Disconnect the nine 9 pin connector J1 the six 6 pin connector J2 and the four 4 pin connector J3 from the Power Supply Board Note that these connectors are keyed Remove the two 2 screws and nuts that secure the Power Supply to the case Note that there are lock washers on each screw and a ground wire leading from the Line Filter on the left screw Remove the Power Supply board by pulling the front of the board toward the keyboard and then liftin
14. unit and replace the lid as ESQ Service Manual ESQ M 42 ONS gt op nS Sle Replacing Power Supply Remove all cables connected to the ESQ M including the Power cable Remove the twelve 12 screws that fasten the lid and remove the lid Disconnect the cables from the Main board J2 the Display board 13 and the Transformer J1 Note that these connectors are keyed and that they have connector locks The Power supply is held in place by three 3 self tapping screws inserted from the bottom of the unit Remove the three screws and remove the Power supply To replace the Power supply re attach the heat sink onto the bottom of the unit with the three screws Re attach the cables paying particular attention to the alignment of pins and connectors Power up test the unit and replace the lid Replacing the Transformer Remove all cables connected to the ESQ M including the Power cable Remove the twelve 12 screws that fasten the lid and remove the lid Disconnect the Transformer cables from the Power supply Power switch and the main fuse making a note of the correct polarities Remove the four 4 screws and star washers that attach the Transformer to the base Install the new Transformer using the four 4 screws Re connect the Transformer cables Power up test the unit and replace the lid Replacing the Line Filter Remove all cables conn
15. 12 Display 19 16 Same as 12 Analog Filament 20 21 Same as Display filament Display Offset 20 16 Same as V Unreg TESTING THE POWER SUPPLY UNLOADED If the Power Supply readings exceed the indicated tolerance particularly the 5 Digital line between terminals 10 and 11 it is possible that a defective component on the Main Board is drawing the Power Supply down In this case you should test the Power Supply unloaded before proceeding To do so follow this procedure Turn the unit OFF and remove the two connectors on the right side of the Power Supply leaving only the connector from the Transformer attached Voltages should read as in the chart above If these readings are normal when the supply is unloaded then a problem with the Main or Display Board is usually indicated HARDWARE NOTES 1 VERY IMPORTANT Avoid Stripping Screws Because the structural components Base Control panel Wheel cover and Keyboard Support Rails are made of plastic great care should be exercised when assembling or disassembling any part of a plastic ESQ 1 AVOID OVER TIGHTENING SCREWS IN THE PLASTIC CASE WHEN EXECUTING THIS OR ANY OTHER REPAIR PROCEDURE When replacing any of the self tapping screws it is possible to over tighten the screws and strip a hole in the case making it necessary to replace the case or control panel To keep this from happening follow these procedures Before replacing the screw screws put a drop or two of LOCKTITE
16. Digital Supply 1 3 13 5 to 16 5 12 5 to 15 5 15 to 19 VACrms Analog Supply 4 6 22 5 to 28 21 5 to 26 5 23t0 29 5 VACrms Display Filament 9 8 5 to 10 5 8 to 10 8 5 to 11 VACrms 5 Digital 1 1G 4 8 to 5 25 Same Same VDC V Unreg 12 10 8 to 11 Same Same VDC 12 Analog 13 14 11 7 to 12 6 Same Same VDC Analog GND 10 14 0 connections are common Same Same VDC 12 Analog 15 14 11 4 to 12 6 Same Same VDC 5 Display 7 5716 Same as 5 Digital Same Same Vbb 18 16 45 10 55 3810 48 4510 55 VDC 12 Display 19 16 Same as 12 Analog Same Same Filament 20 21 Same as Display filament Same Same Display Offset 20 16 Same V Unreg TESTING THE POWER SUPPLY UNLOADED the Power Supply readings exceed the indicated tolerance particularly the 5 Digital line between terminals 10 and 11 it is possible that a defective component on the Main Board is drawing the Power Supply down In this case you should test the Power Supply unloaded before proceeding To do so follow this procedure Turn the unit OFF and remove the two connectors on the right side of the Power Supply leaving only the connector from the Transformer attached Unloaded the 5 V line will read considerably higher Power Supplies marked PART NO 4010005601 can be expected to produce voltages between 13 and 16 5 VDC at the output of the 5 Volt regulator between terminals 10 and 11 Power Supplies marked PART NO 4010004201 can be expected to see voltage
17. EASE CONTACT ENSONIQ CUSTOMER SERVICE FORA MAIN BOARD REPLACEMENT 21 Signetics 2 National Figure 9 ESQ Service Manual Plastic 28 IMPORTANT on 5 6 Replacing the Main Board Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Remove the Keyboard and metal Main board shield see Section D of ESQ 1 Plastic Note that you should remove the twenty six 26 pin ribbon cable from the Main Board at J3 instead of from the keyboard Remove the seven 7 nuts from the rear panel jacks marked Sustain Ft Sw Sequencer Ft Sw Tape Out Tape In Pedal CV Left Mono and Right Audio Out Remove the Program Cartridge cable J2 from the Main board Remove the nine 9 screws from the Main board Before installing the new circuit board make sure the cardboard insulator is in place the unit came equipped with an SQX 10 or SQX 20 Sequencer Expander Cartridge it should be removed from the old board and installed on the new one It is recommended that this be done before the new board is fastened down Ta 8 10 11 SRT gt With the board titted on a slight angle insert the jacks into the holes in the rear panel Press the board down into place Replace the Main board screws and secure the jacks with the nuts Connect the Program Cartridge cable and the Key
18. L press each Soft button to verify that the appropriate Program name gets underlined B Press each button in the VOICE section and verify that they select the proper pages The name of each Page which corresponds to the button pressed appears in the upper left corner of the display Press the MASTER STORAGE and MIDI buttons the SEQUENCER section and verify that they select the proper pages Press the CREATE ERASE EDIT CONTROL SELECT MIX MIDI and LOCATE buttons are verify that they select the proper pages Test the Sequencer Transport controls RECORD START STOP and PLAY to verify their proper operation Press the up arrow key The Tempo should increase G Press the down arrow key The Tempo should decrease Failure most likely indicates a problem with the Keypad Display Board and Main Board problems however also affect the Keypad function NOTE 1 possible that on early metal units leads the back of the Keypad Board shorting to components on the Display Board If the unit functions properly with the Display board detached from the case but still connected electrically then this shorting is almost certainly the problem see Hardware Notes Metal on p 16 ESQ Service Manual Metal and Plastic 3 8 Stereo Test D Press the DCA 4 button and select PAN 4 Using the Data Entry Slider move the Pan value to 0 and play more than 8 notes There should o
19. Pan value to 0 and play more than eight notes There should only be sound coming from the left channel d Move the Pan value to 15 and play more than eight notes There should only be sound coming from the right channel ESQ Service Manual ESQ M 40 e Unplug the RIGHT Output Cable and play notes while moving the Pan value up and down There should not be any variation in the volume of the sound from the left channel f Set the Pan value back to 08 Failure indicates Main Board problem 11 Sound Test a Select your favorite patch and play b Test the Volume Slider to see that it adjusts volume Failure usually indicates a Main Board or Volume Slider problem 12 Re Initialization of Unit a Re initialize the unit as described in Step 4 b Retune the Filters as described in Step 5 13 Burn in Routine a Select the Hidden Functions Page see Step 1 b Select the ANALOG TESTS page using the Scroll button see Step 6 c While on this page a chromatic scale is automatically sent through MIDI Out To burn in a unit simply connect a MIDI cable between MIDI In and MIDI Out d Verify that the scale is playing SOFTWARE NOTES The following changes were made to Software version 1 0 and are incorporated in Software version 1 1 1 When the unit is re initialized instead of installing 40 copies of the program called BRASS1 the 40 internal programs are restored to the default factory internal set from ROM 2 The edit buffer is a
20. Plastic 29 IMPORTANT 3 Replacing the Keypad Board Follow steps 1 5 in Section B ESQ 1 Plastic Remove the Volume and the Data Entry knobs Remove the Display board insulator making sure to note its position The individual colored buttons are held in place only by the Keypad board and the insulator To prevent them from falling out when the board is removed make sure the control panel is open all the way Remove the twenty one 21 screws that hold the Keypad in place and remove the Keypad first make sure that the insulator and all the buttons in place Make sure that the eight 8 display lens retainers are in the proper position and that the lens is clean Install the new Keypad board using the twenty one 21 screws Re install the Display board insulator and then re install the Display board Re connect the wire harnesses and ribbon cable paying attention to polarity Re install the knobs on the Data Entry and Volume sliders Power up test the unit and close the front panel Replacing the Keyboard Two keyboards are now being used one with the connector on the left end of the keyboard and the other with the connector on the the middle of the keyboard Please inform Customer Service which keyboard you have to ensure that you are shipped the correct replacement keyboard and or cable End Connector use long keyboard cable Middle Connector use sho
21. SQ 1 never returns from flashing PLEASE WAIT Turning the unit Off and On again cures the problem 4 The first time that MIDI data is loaded after powering up the unit the unit has a tendency to fail to load the display will read TARGET SYSTEM NOT RESPONDING even though all connections are correct The data load will be successful if tried again 5 Due to jitter on the part of the Data Entry Slider parameters on Programming pages and Tempo on Sequence pages will sometimes jump to the present value of the slider The following are problems that have been identified in Software version 2 0 which might lead to a user problem 1 With version 2 0 it is possible to set the pitch bend range outside the legal limit to values of 49 to 63 itis necessary to re initialize the unit to re set pitch bend to the proper range of 0 to 12 2 The sequencer sometimes fails to accurately record sustain pedal information 3 The sequencer will sometimes play back key down events with velocity of 0 if the key had been recorded with a low velocity value 4 In MIDI MONO mode the ESQ 1 may not properly receive program changes all channels 5 When syncing to tape the sequencer will sometimes play the first note of the sequence as soon as the user presses play putting the rest of the sequence out of sync The following are changes that have been included in Software version 2 2 1 A parameter was added to allow the CV Pedal to be used as a vo
22. SQ M b Connect the Left Mono and Right audio outputs to the headphone amplifier c Connect a CV Pedal to the ESQ M 3 Keypad Test a Press Write The display should read REPLACE EDIT PRG b Press Param then press each of the number buttons 0 through 9 and verify the corresponding pages are displayed It is necessary to wait for at least two seconds between button presses Press Program The display should show a Track page with a Program selected Press Scroll The track number displayed should be incremented by 1 Press Up Arrow Yes The Program number displayed should be incremented by 1 Press Down Arrow No The Program number displayed should be decremented by 1 Failure most likely indicates Keypad Display problems however Main Board problems also affect the Keypad Display function 4 Re lnitialize Unit Memory Reset a Go to the Hidden Functions Page see Step 1 b Select the MEMORY RESET page using the Scroll button c While holding Scroll press Storage The display will read RESET ALL MEMORY d Press Up Arrow Yes The display will show the wake up screen for two seconds and then return to the Program mode 5 Filter Tune a Go to the Hidden Functions Page see Step 1 b Select the FILTER TUNE page using the Scroll button While holding Scroll press Storage The display will sequence through the eight filters and show a number for each Verify that each fitter number is between 140 and 160 Fai
23. SUREMENTS On plastic ESQ 1 systems designed for 115 VAC US operation there is only one proper Power Supply Transformer configuration This configuration is denoted by both the label on the top of the Transformer and the part number silk screened on the lower left of the Power Supply PC board The proper Transformer Power Supply configuration for plastic ESQ 1 s is Transformer labeled 1450000301 115V and Power Supply labeled 4001006901 If you suspect a problem with the Power Supply and the labels on the Transformer and Power Supply do not correspond to the above configuration contact the Ensoniq Customer Service Department for instructions S Back of Unit To Transformer 4 Harness POWER SUPPLY BOARD To Display FIGURE 8 Power Supply Voltage Check points ESQ 1 Plastic The following chart lists the voltage ranges for proper operation of each supply fully loaded and the appropriate terminals to read across with the voltmeter refer to Figure 8 for terminal locations Designation Terminals Allowable range Units ree Digital Supply 1 3 15 to 19 VACrms Analog Supply 4 6 23 to 29 5 VACrms Display Filament 7 9 8 5 to 11 VACrms 5 Digital 110 4 8 to 5 25 VDC V Unreg 12 10 810 11 VDC 12 Analog 13 14 11 7 to 12 6 VDC Analog GND 10 14 0 connections are common VDC 12 Analog 15 14 11 4 to 12 6 VDC 5 Display 17 16 4 75 to 5 25 Vbb 18 16 45 to 55 VDC
24. board Locate U22 74LS04 and scrape away the solder mask coating from about 1 4 inch of the digital ground bus directly across from pin 1 of U22 see Figure 5 Tack solder a 470pf capacitor between pin 1 of U22 and the scraped portion of the ground bus D Temporarily re connect the power cable J11 and the Display cable J4 and test for proper start up BEFORE replacing the keyboard Replace the keyboard as described in Section D ESQ 1 Metal F Power up test the unit and close the control panel NOTE IF U22 74LS04 ISA SIGNETICS OR NATIONAL SEMICONDUCTOR 1 DO NOT INSTALL THIS CAPACITOR PLEASE CONTACT ENSONIQ CUSTOMER SERVICE FOR A MAIN BOARD REPLACEMENT a Signetics 7 National Semiconductor DIGITAL GROUND BUS Figure 5 ESQ Service Manual Metal 17 Replacing the Main Board Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Remove the keyboard see Section D ESQ 1 Metal Note You should remove the twenty six 26 pin ribbon cable from Main board J2 instead of from the keyboard Remove the seven 7 nuts from the rear panel jacks marked Sustain Ft Sw Sequencer Ft Sw Tape Out Tape In and Left and Right Audio Out Disconnect the Voice Cartridge connector J3 the Display cable J4 the Power cable J11 and the Wheels cable J12 Remove the gro
25. board cable present feed the ground wire up through the hole in the metal shield Re install the keyboard and metal shield see Section D ESQ 1 Plastic Power up test the unit and close the front panel Replacing the Display Board Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Remove the six wire and four wire cable harnesses located on the left side of the Display board Note that they are keyed Remove the twenty 20 pin ribbon cable from the Display board paying particular attention to the polarity Due to the variety of voltages that are required for the operation of the Display reversing any of the connectors to the Display board will damage components on the board The six wire and four wire harnesses are keyed to prevent this potential damage The ribbon cable is NOT keyed and it must be reinstalled the same way it was removed If the 12 volts that this cable carries is reversed the voltage may be applied to data lines on the display processor resulting in the processor s untimely demise 5 6 Remove the eight 8 screws which hold the Display board in place As a part of the re assembly make sure the cardboard insulators in place Install the new board using the eight screws Re connect the wire harnesses and the ribbon cable Power up test the unit and close the front panel ESQ Service Manual
26. d waveform pointer in EPNO2 wavetorm 2 Restored the values of the TOUCH parameters to their original and correct order HARD MED SOFT HARDWARE NOTES Button Presses when Writing a Program In some units there have been problems selecting certain program positions This problem shows up either when holding down Bank 1 and Soft button 10 or when holding down Cart A and Soft button 7 Swapping the Display board should fix the problem If the customer doesn t want the Display board swapped the work around is as follows 1 Bank 1 and Soft button 10 press Bank 1 the hold down Internal and press Soft button 10 Cart A and Soft button 7 press A the hold down the proper Bank button and press Soft button 7 Three button presses in any order are needed to tell the ESQ 1 what to select This work around just changes the order in which the three buttons are pressed D Tips When saving data to home type deck with level controls and VU meters make sure the record level is high enough right near 0 dB seems to work best Too low a record level will bury the data in tape hiss When loading wait 4 to 6 seconds into the leader tone before pressing the ESQ 1 button that starts the procedure This lets the tone settle out and lets the recorder get up to speed the recorder doesn t have a level meter listen for the leader tone before starting Tape Load operation When loading from
27. dicates that the system is confused and you should re initialize while holding Record press Soft button 1 then press the Soft button above YES tune the filters while holding Record press and check it again the message continues to appear or the value next to BAT reads greater than 20 1 Check Supply Check the power supply voltages loaded and unloaded as described in the Service Manual paying particular attention to the 12A and 12 If these voltages are off by more than the allowable 10 in either direction or the circuit that reads the battery voltage will give unreliable results This indicates a power supply problem Check Battery Voltage the power supply voltages are OK turn the unit OFF and measure the voltage across the battery The voltage across the battery should measure no less than 2 7VDC If the voltage is less than 2 7VDC the battery needs to be replaced Alter replacing the battery recheck the voltage across the battery and check the main board as described in Step 3 below to ensure that the main board isn t loading down the battery Check Main Board the battery voltage is correct and the message continues to appear check the following to make sure that the main board isn t loading down the battery Metal Check 1 Plastic Check CR3 The voltage across this diode should measure no more than 400mVDC b Metal Check U19 U20 Plastic Check U14 U18 the voltage m
28. dv Cursor BANK 3 gt Tracks Mix Erase Underscore at Cursor BANK 4 Up arrow Stop Erase Underscore at Cursor Adv Cursor Compare Fe MIDI Underscore 5 Characters Up inc 0 Control Underscore 6 Characters Down Dec 1 Locate Underscore 7 Characters Write 2 Play Underscore 8 Characters Soft But 1 3 OSC 1 Erase Underscore 5 Characters Soft But 2 4 OSC 2 Erase Underscore 6 Characters Soft But 3 5 OSC 3 Erase Underscore 7 Characters Soft But 4 6 ENV 1 Erase Underscore 8 Characters Soft But 5 Enter Flashing Underscore mode DCA 1 Soft But 6 7 DCA2 Soft But 7 8 Soft But 8 9 Filter Space Soit But 9 Enter Flashing Mode ENV 3 Space Soft But 10 Enter Normal Mode ENV 4 Space LFO 1 Enter Underscore Mode 4 Space LFO 2 8 MODES Space LFO 3 SplivLayer Space ENV 2 Advance Cursor ESQ Service Manual Metal and Plastic 6 SOFTWARE NOTES The following are problems that have been identified in Software version 1 7 which might lead to System crash or other User problem 1 Selecting a different song while sequence is running can cause the system to crash 2 Performing any of the following sequencer functions when there is very little sequencer memory remaining can cause the system to crash a Saving or merging a track b Erasing a track c Recording a track 3 The system will occasionally lock up after loading data from MIDI The data is transferred intact but the E
29. e Hard Reset you are unable to re initialize the unit due to scrambled software i e the keypad not responding you can clear the RAM by following this procedure 1 Make sure the power is off 2 FOR METAL UNITS short the right side lead of CR1 to C1 FOR PLASTIC UNITS short the right side lead of C18 to the left side lead of CR3 You should now be able to re initialize the unit as described above ESQ Service Manual Metal and Plastic 5 USING SELF TEST MODE TO DIAGNOSE DISPLAY ASSEMBLIES 1 the unit comes in with a blank display but is in Self test mode i e the Display prints out characters when front panel buttons are pressed in accordance with the following chart this indicates the problem is either the Main Board or the communication link between the Main Board and the Display Board Before replacing anything check all connections particularly the tour 4 wire connector to the Display Board Test the Main Board with a known good Display board to determine whether the Main Board or Display Board is at fault If the Main Board is at fault try re initializing the RAM as outlined in Step 15 of the ESQ 1 Test Procedure page 5 2 the display is blank and remains blank not in Self test mode turn the unit OFF open the front panel and disconnect the four wire connector from the Display Board This interrupts communications between the Main Board and the Display Board Close the lid and turn the power ON If the unit n
30. e front of the ESQ M Re initialize the unit and tune the Filters Step 4 and 5 of the ESQ M Test Procedure Power up test the unit and replace the lid ensoniaj The Technology That Performs In the US 155 Great Valley Parkway Malvern Pennsylvania 19355 Parts Ordering 1 800 441 1003 In Canada Kaysound Imports Inc 6969 Trans Canada Highway Suite 105 St Laurent Canada H4TIV4 Parts Ordering 514 331 8420
31. e that they are keyed Remove the twenty 20 pin ribbon cable from the Display Board paying particular attention to the polarity IMPORTANT Due to the variety of voltages that are required for the operation of the Display reversing any of the connectors to the Display Board will damage components on the board The six wire and four wire harnesses are keyed to prevent this The ribbon cable is NOT keyed ESO Service Manual Metal 18 however and it must be re installed in the same way it was removed If the 12 volts that this cable carries is reversed the voltage may be applied to data lines on the display processor resulting in the processor s untimely demise Remove the eight 8 screws which hold the Display board in place Install a new Display board and replace the eight screws Re connect the wire harnesses and the ribbon cable Power up test the unit and close the front panel Replacing the Keypad Board 1 Remove the Display Board Follow steps 1 5 in Section B ESQ 1 Metal 2 Remove the Volume and Data Entry knobs 3 The individual colored buttons are held in place only by the Keypad circuit board To prevent them from falling out when the board is removed open the control panel all the way and tilt the unit back by placing a 3 block under the front edge of the unit 4 Remove the nineteen 19 screws that hold the Keypad in place and remove the Keypad 5 Replace with a new Keypad and replace t
32. easured at the battery minus approximately 400mVDC the drop across the diode is not present at both the diode and the RAM chips this indicates a main board problem It is possible that a faulty memory expander SQX 10 or SQX 20 is draining the battery If you suspect the cartridge remove it and perform the above tests again SYSTEM ERROR MESSAGES System Error 1 Buffer Overflow System Error 2 This message should never occur the ESQ 1 System Error 3 DUART Unrecognized Command is important to realize that these messages are intended as diagnostics and do not necessarily indicate a problem These messages are not fatal You can press any button to continue It is possible that these messages could result from scrambled memory As usual you may want to try re initializing the system don t forget to tune the filters If the message is still chronic see the following page ESQ Service Manual Metal and Plastic 9 1 This error could occur too much information is coming in This may indicate a problem MIDI interconnections between the ESQ 1 and other devices Of course there may simply be too much information being sent to the ESQ 1 for it to deal with All MIDI devices have a limit on how much MIDI information they can process before they get overloaded Our system tells you when it is getting too much most other products simply choke or crash 2 This message should never occur on the ESQ 1 3 This message
33. ected to the ESQ M including the power cable Remove the twelve 12 screws that fasten the lid and remove the lid Remove the three 3 wires connected to the tabs on back of the Filter paying particular attention to polarity Remove the two 2 screws nuts and star washers that secure the Filter to the case Note that there are star washers on both the inside and the outside Install the new Line Filter from inside the case and reconnect the three 3 wires to the Filter again noting the proper polarity IMPORTANT Failure to connect the wires to their proper posts can lead to a potential shock hazard see Figure 12 6 Power up test the unit and replace the lid ESQ Service Manual ESQ M 43 Replacing the Operating System EPROM The ESQ M operating system can be updated by replacing the OS EPROM Each ESQ M has one Operating System EPROM located near the center of the Main board After replacing this EPROM the ESQ M must be re initialized as described in Step 4 and the Filters should be tuned as described in Step 5 of the ESQ M Test Procedure 1 2 3 You will find the Operating System EPROM U14 located in the center of the Main Remove all cables connected to the ESQ M including the Power cable Remove the twelve 12 screws that fasten the lid and remove the lid board Carefully remove the EPROM and insert the replacement EPROM into its sockets Be sure the notch in the EPROM is facing towards th
34. em to crash a blank display To remove the star washer on the screw above the J1 connector first remove the Transformer as described in Section D see page 43 ESQ Service Manual ESQ M 41 IMPORTANT IMPORTANT gt Replacing Remove cables connected to the ESQ M including the Power cable Remove the twelve 12 screws that fasten the lid and remove the lid Remove the three 3 nuts from the rear panel jacks marked Pedal CV and Left and Right Audio Out Disconnect the Voice Cartridge cable J1 the Keypad Display cable J2 and the Power cable J6 These connectors are keyed and have connector locks Remove the eight 8 screws which hold down the Main board Before installing the new Main board make sure the cardboard insulator is in place Tilt the new Main board on a slight angle and insert the jacks into the holes in the rear panel Secure the jacks with the nuts and replace the screws Carefully reconnect the Voice Cartridge Keypad Display and Power cables paying particular attention to the alignment of pins and connectors 10 Power up test the unit and replace the lid Replacing the Keypad Display Board Remove all cables connected to the ESQ M including the Power cable Remove the twelve 12 screws that fasten the lid and remove the lid Remove the ribbon cable and the six wire cable from the Keypad Display board Note the polarity of
35. ences or failure to hear the metronome indicates a Main Board problem OIC GD 2 Backup Turn the unit off Wait 10 seconds Turn the unit back and verify that the Program memories have not reverted to BRASS 7 for OS 2 2 or lower Failure to retain Internal Programs indicates a Main Board problem NOTE For units with OS versions 2 3 or higher you must test the memory back up by first creating a sequence and then verifying that it is retained after the unit is turned off and then on again 3 Analog Input Test A While holding down the RECORD button press the COMPARE button Repeatedly press the FEAD Soft button and verify each of the following 1 PTCH reads a between 110 and 150 when the Pitch Wheel is centered b 30 or lower when Pitch Wheel is down 220 or higher when Pitch Wheel is up 2 MOD reads a Owhen the Mod Wheel is down b at least 240 when Wheel is up 3 KNOB moves from 0 to 255 when the Data Entry Slider is moved ESQ Service Manual Metal and Plastic 2 4 PED moves from 0 to 255 when the Pedal is moved 5 BAT reads 0 Make sure the Pitch Wheel is not being held off center and press READ more time Failure on this page indicates a problem with the corresponding part although it could also indicate a Power Supply failure or a Main Board problem If all the readings are off then it is most likely that there is a problem with the Main Boa
36. er Supply Unloaded Hardware Notes Figure 9 Section A Section B Section C Section D Figure 10 Section E Section F Section G Section H Section I Section J specific to the Plastic ESQ 1 Intermittant Start up Problem Modification Replacing the Main Board Replacing the Display Board Replacing the Keypad Board Replacing the Keyboard Bottom of ESQ 1 Plastic Case Replacing the Power Supply Replacing the Transformer Replacing the Pitch Mod Wheel Assembly Replacing the Line Filter Replacing the Operating System EPROMs Installing Ferrite Bead Figure 10A Ferrite Bead Installation ESQ M Section 4 ell ESQ M Exploded View Checking the Power Supply Transformer and Power Supply Voltage Points Power Supply Measurements Testing the Power Supply Unloaded ESQ M Test Procedure SOON AWA WN g Getting to the Hidden Functions Page Initial Setup Keypad Test Re initialization Of ESQ M Filter Tune Analog Test Load from Cartridge Test Write to Cartridge Test Memory Protect Test 10 Stereo Test 11 Sound Test 12 Re initialization Of ESQ M 13 Burn in Routine Software Notes and Hardware Notes Section A Section B Section C Section D Section E Section F Replacing the Main Board Replacing the Keypad Display Board Replacing the Power Supply Replacing the Transformer Replacing the Line Filter Replacing the Operating System EPROM daoNanoas 109 00 200
37. ese before trouble shooting the rest of the unit Plug the ESQ 1 in and turn it on Using a 2 5 mm allen wrench remove the four screws securing the front panel and raise the panel Check to make sure that all the connections are secure and correct After the ESQ 1 has warmed up for five minutes begin to test the voltages at the points shown in Figures 7 and 8 if the voltages vary outside the allowable limits follow the procedure described under Testing the Power Supply Unloaded see page 27 before replacing it TRANSFORMER AND POWER SUPPLY VOLTAGE CHECK POINTS The proper AC Line Voltage for each ESQ 1 should be printed on the top of the Transformer Figure 7 shows the check points for reading the AC Line Voltage Figure 8 shows the connector terminal numbers and correct voltage values for the Power Supply and Transformer It is normal for Line Voltage to vary 10 f Back of Unit ij WARNING There are dangerous Voltages present in this area as well as in the Power Supply and Display Board Green Primary FIGURE 7 AC Line Voltage Check Points ESQ 1 Plastic ESQ Service Manual Plastic 25 AC LINE VOLTAGE MEASUREMENTS See Fig 7 With the power switch OFF With the power switch ON the proper AC Line Voltage the proper AC Line Voltage should read from should read from 2B 1A 2B 1B 2B 3B 2B 3A 2B 1A 2B 2A 2B 3B There should be no voltage across the power switch POWER SUPPLY MEA
38. ess the STORAGE button and select TAPE LOAD Start tape playback and after the leader tone appears on the Tape Deck s level meters select INT BANKS After 50 seconds the display should return to normal without error Press the INTERNAL button and select each Bank to verify the Program names have not been scrambled If the Tape Input on the Main Board is not functional the message TAPE NOT STARTED ON LEADER will always appear If the Tape loads for a while and then the Display reports FATAL ERRORS DETECTED it is highly unlikely that there is a problem with the Main Board It 15 much more likely that the tape level 18 not set properly See TAPE TIPS Hardware Notes p 8 moov Filter Tune A While holding the RECORD button press the FILTER button B The value for each filter will be displayed sequentially Verify that all numbers are between 140 and 160 inclusive Failure indicates a Main Board problem Sound Test Select your favorite patch and play Play all of the keyboard keys and check for velocity sensitivity Adjust the Volume Slider to make sure it has the appropriate effect on Volume Failure usually indicates a Main Board or Volume Slider problem One dead key would Indicate a keyboard problem Eight or more dead keys could indicate keyboard or keyboard cable problem 0 gt ESQ Service Manual Metal and Plastic 4 13 MIDI Test gt Connect MIDI In to MIDI
39. est Cartridge Test Keypad Test Stereo Test Tape Output Test 10 Tape Input Test 11 Filter Tune 12 Sound Test 13 MIDI Test 14 Re initialization Of ESQ 1 15 Hard Reset Using Self Test Mode to Diagnose Display Assemblies 1 09 03 Software Notes O S 1 7 thru O S 3 5 8 Hardware Notes Battery Low Message System Error Message 10 Flowchart Troubleshooting an ESQ 1 with a Blank Display 0 Metal ESQ 1 Section 2 Figure2 5 1 Metal Exploded View Checking the Power Supply 13 Figure3 AC Line Voltage Check Points 13 Power Supply Measurements 14 Figure4 Power Supply Voltage Check Points 14 Testing the Power Supply Unloaded 15 Harware Notes specific to the Metal ESQ 1 16 Figure5 Intermittent Start up Problem Modification 17 Section Replacing the Main Board 18 Metal ESQ 1 Continued Section B Section C Section D Section E Section F Section G Section H Section I Replacing the Display Board Replacing the Keypad Board Replacing the Keyboard Replacing the Power Supply Replacing the Transormer Replacing the Pitch Mod Wheel Assembly Replacing the Line Filter Replacing the Operating System EPROMs Plastic ESQ 1 Section 3 Figure 6 ESQ I Plastic Exploded View Checking the Power Supply Figure 7 AC Line Voltage Check Points Power ey Measurements Figure 8 Power Supply Voltage Check Points Testing the Pow
40. g it up so that the heat sink clears the case ESQ Service Manual Plastic 31 6 Before replacing the Power Supply board first make sure that the insulator pad is place The standoffs are intended only for support and should not be stuck down to the case 7 Insert the replacement Power Supply Board from the inside of the case heat sink first Lift the heat sink from the outside of the case so that it is centered in the opening 8 Re install the Power Supply screws and lockwashers and be sure to connect the ground wire from the Line Filter Carefully re connect the three cables paying particular attention to the alignment of pins and connectors 9 Power up test the unit and close the control panel Replacing the Transformer Due to problems that may occur with the plastic case all units that need the Transformer replaced should be sent back to the factory Contact your distributor if you are outside the U S Replacing the Pitch Mod Wheel Assembly The Pitch and Mod Wheels are replaced as an assembly along with the cable hamess 1 Remove all cables connected to the ESQ 1 including the Power cable 2 Remove the four 4 screws that fasten the control panel and raise the panel 3 Place the unit upside down on a soft surface and remove the four 4 screws that attach the Wheel Assembly to the case See Figure 10 for location of screws 4 Return the unit to an upright position Cut the wire ties that hold the wire
41. he control panel and raise the panel Remove the Keyboard as described in Section D ESQ 1 Metal Remove the top side screw that attaches the Pitch Mod Wheel housing to the case via L shaped tab directly beneath the lowest key of the keyboard Remove the two 2 hex screws on the top left side of the assembly Tit the unit on its back and remove the two 2 remaining screws that hold the housing in place Cut the wire ties that hold the wire harness in place and disconnect the harness from the main board J12 Connect the new Pitch Mod Wheel wire harness and align the housing with the screw holes Replace the three screws that hold it in place Replace the keyboard see Section D ESQ 1 Metal 0 Power up test the unit and close the front panel Replacing the Line Filter Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Remove the three 3 wire tabs connected to the back of the Filter paying particular attention to polarity Remove the two 2 screws and nuts that secure the Filter to the case Note that there are lock washers on both the inside and the outside Install the new Line Filter from inside the case sap reconnect the wires to the Filter again noting the proper polarity IMPORTANT Failure to connect the wires to their proper posts can create a shock hazard see Figure 6 3 ESQ 1 Metal Power up tes
42. he nineteen 19 screws that hold it in place IMPORTANT NOTE Before you replace the Keypad board be sure to re insert the two small plastic cups that fit between the Data Entry and Volume sliders and the inside of the case To insure a proper fit first insert the cups into the holes in the case and then insert the slider shafts through the cups 6 Re install the Display board and re connect the wire harnesses and ribbon cable paying attention to polarity Re install the knobs on the Data Entry and Volume sliders 7 Power up test the unit and close the front panel Replacing the Keyboard Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Place the unit upside down on a soft surface Remove the ten 10 screws that hold the Keyboard in place Disconnect the twenty six 26 pin ribbon connector from underneath the Keyboard paying particular attention to the polarity Remove the Keyboard from the case Connect the twenty six 26 pin ribbon cable to the new Keyboard and place it in the unit Replace the screws that hold the Keyboard in place Power up test the unit and close the front panel naona 50 Service Manual Metal 19 IMPORTANT NOTE Replacing the Power Supply Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the co
43. ing Ferrite Bead On later plastic ESQ 1 s a ferrite bead was added to the wires from the transformer to the power supply to prevent possible memory loss All plastic case ESQ 1 s with operating system 3 X must have a ferrite bead intalled This is because O S 3 X is extremely sensitive to power spikes that may occur The ferrite bead is used to suppress spikes that might be induced onto the ground plane Call ENSONIQ Customer Service if you need ferrite beads 1 Carefully surround the 9 wires from the transformer to the power supply with both ferrite bead halves 2 Tape both halves in place then use heat shrink tubing to secure the ferrite bead halves together 3 Be sure to completely enshroud the ferrite bead with the tubing to ensure proper insulation 4 Use to keep the bead close to the power supply connector J1 Back of Unit 4 Transformer Figure LOA Ferrite Bead Installation ESQ 1 Plastic ESQ Service Manual Plastic 34 5 SERVICE MANUAL SECTION 4 ESQ M 4 gt 4 gt 5 lt m Z gt 50 INTERNAL MEMORY Agiven ESQ M is likely to have Program data in its internal memory that is near and dear to the owner of that unit In the event that it becomes necessary to re initialize the memory during repairs it is highly recommended that the internal program memory in the unit be saved to an STC 8 E2PROM Storage Cartridge before servici
44. lume pedal a well as Mod Pedal 2 Allowed data dumps to disk drives capable of accepting generic system exclusive messages 3 Allowed compatibility with MIDI Guitar controller 4 Ability to output a tape syne clock when syncing to MIDI clocks as well as when syncing to tape The following are changes that have been included in Software version 2 3 1 40 internal programs are reloaded after reinitialization a 2 Fixed a bug which caused erratic operation when using the LOCATE function by more than 16 bars The following are changes that have been included in Software version 3 0 1 Added sequence editing features which allows addition and deletion of variable bars at any boundary within a sequence 2 Ability to rename songs by pressing the soft button above the song name on the SONG EDIT page 3 Allowed startup screen to automatically switch to last selected internal page 4 VELOCITY parameter renamed to TOUCH The following is a change that was included in Software version 3 1 1 Ability to remain in SONG mode even after unit was turned off ESQ Service Manual Metal and Plastic 7 SOFTWARE NOTES CONTINUED The following is a change that was included in Software version 3 4 1 Corrected a sequencer problem which prevented the ESQ 1 from recording correctly when synchronized SYNC MIDI CLOCK with units which send clocks continuously The following are changes that have been included in Software version 3 5 1 Correcte
45. lure indicates a Main Board problem ESQ Service Manual ESQ M 39 6 Analog Tests a Go to the Hidden Functions Page see Step 1 b Select the ANALOG TESTS page using the Scroll button c While holding Scroll press Storage The display will show the values for the Data Entry Slider D nnn the CV Pedal P nnn and the Battery d Verify that the Data Slider range is from 000 to 255 NOTE The Data Slider value is updated automatically and may vary by or 4 counts Verify that the CV Pedal range is from 000 to 255 Verify that the Battery is 00 Press Storage to exit this function Failure on this page coincides with the part named Failure could also indicate a Power Supply a Main board problem If all the readings are off the problem is most likely with the Main board 7 Load From Cartridge Insert a Voice Cartridge Select the Storage Page press Param then Storage Press Scroll until the display reads ST CART A TO INT While holding Scroll press Storage The display will read COPYING PROGRAMS Remove the Voice Cartridge Failure usually indicates a Main board problem Check the Cartridge cable however to see that it is installed correctly stripe at pin 1 and that none of the connectors pins are offset bent under See HARDWARE NOTES on 41 8 Write to Cartridge a Insert a Test STC 8 Cartridge not a Voice Cartridge in the
46. lways replaced by any edit action immediately following system re initialization This prevents the occasional problem of having an incorrect program in the edit buffer The following change was included in Software version 1 2 A software change was made to the system initialization routines to eliminate a condition that was found to occur on a relatively small number of units When the affected unit was re initialized after being on for a period long enough to reach maximum normal operating temperature the display would occasionally become scrambled HARDWARE NOTES The following items are hardware trouble spots identified with the hardware of the ESQ M Being aware of these points can save you time when troubleshooting the unit 1 Write to Cartridge Errors This problem shows itself in two forms 1 Getting a WRITE FAILED error message while trying to write to an STC 8 cartridge or 2 After writing to one position another position s name is altered usually position 119 This may be caused by Texas Instruments 74ALS244s in position U1 and U2 or Fairchild 74F139s date code 8645 in position U15 and U18 If either of these parts in these positions swap the Main board 2 No Display On the first ESQ M s star washers were used all the screws that attached the Keypad Display Board to the base of the unit In some cases the star washer on the screw above the J1 connector can short to a trace underneath it This will cause the syst
47. ng See the ESQ M Musician s Manual for full instructions on saving Program data CHECKING THE POWER SUPPLY Many ESQ M problems may be related to a faulty Power Supply Transformer or Line Filter You should check these before troubleshooting the rest of the unit Plug the ESQ M and turn it on Using 2 5 mm allen wrench remove the twelve screws securing the lid and remove it Check to make sure that all the connections are secure and correct When the ESQ M has warmed up for five minutes begin to test the voltages at the points shown in Figures 12 and 13 If the voltages vary outside the allowable limits follow the procedure described under Testing the Power Supply Unloaded see page 38 before replacing it TRANSFORMER AND POWER SUPPLY VOLTAGE CHECK POINTS Figure 12 shows the check points for reading the AC Line Voltage Figure 13 shows the connector terminal numbers and correct voltage values for the Power Supply and Transformer It is normal for Line Voltage to vary 10 Back of Unit Gna Lug Program Cartridge Cable Shield WARNING There are dangerous Voltages present in this area as well as in the Power Supply and Display Board Primary Wire FIGURE 12 AC Line Voltage Check Point Power ESQ M Switch 4 Gre ESQ Service Manual ESQ M 37 AC LINE VOLTAGE MEASUREMENTS See Fig 12 With the power switch OFF With the power switch ON the proper AC Line V
48. nly be sound coming from the left channel Move the Pan value to 15 and play more than 8 notes There should only be sound coming from the right channel Unplug the RIGHT Output and play notes while moving the Pan value up and down There should only be sound coming from the left channel and adjusting the Pan setting should have no effect Failure indicates a Main Board problem 9 Tape Ouptut Test NOTE The tape Interface on the ESQ 1 is very level sensitive We recommend that a good quality tape deck with variable output control be used and that levels be set at 0 dB for best results Also be sure to switch off any noise reduction see Hardware Notes Metal on p 8 Connect the Tape Out Jack to the input of the Tape Deck Rewind the tape Press the STORAGE button and select TAPE SAVE Start the Tape Deck recording and then select INT BANKS If no level shows on the Tape Deck s meters check your connections and level settings If any signal is recorded on the tape it is safe to assume that the tape output is working correctly After 50 seconds the display should return to normal Rewind the tape Failure usually Indicates a Main Board problem 10 Tape Input Test 11 12 Connect the Tape In Jack to the output of the Tape Deck While holding down the RECORD button press Soft button 1 Answer YES to re initialize the system see Re initialization of Unit page 5 Pr
49. ntrol panel and raise the panel Disconnect the cable assemblies from the Main Board the Display Board and the Transformer These connectors are keyed and have connector locks ees If the replacement supply has a different Part Number than the original it will be necessary to replace the Transformer as well See POWER SUPPLY MEASUREMENTS Metal page 14 for the listing of compatible Transformers and Power Supplies 4 The Power supply is held in place by three 3 self tapping screws inserted from the back panel and two 2 plastic standoffs Remove the three screws and pull the Power Supply straight up and out while squeezing the standoffs 5 To replace the Power Supply first make sure that the insulator pad is in place Snap the new unit onto the standoffs making sure they are fully seated Re attach the heat sink onto the back panel with the three screws 6 Re attach the wire harnesses paying particular attention to the alignment of pins and connectors 7 Power up test the unit and close the front panel Replacing the Transformer The ESQ 1 s Transformer is riveted into place at the factory Replacing it will require drilling out the four 4 rivets and installing the replacement Transformer with the screws and nuts provided 1 Remove all cables connected to the ESQ 1 including the Power cable 2 Remove the four 4 screws that fasten the control panel and raise the panel 3 Disconnect the Transformer from the Powe
50. oard is drawing the Power Supply down In this case you should test the Power Supply unloaded before proceeding To do so follow this procedure ESQ Service Manual ESQ M 38 Turn unit OFF and remove the two connectors on the right side of the Power Supply leaving only the connector from the Transformer attached If these readings are normal when the supply is unloaded a Main or Keypad Display Board problem is usually indicated ESQ M TEST PROCEDURE The following procedure will ensure the thorough testing of the ESQ M and will also aid in trouble shooting the unit To perform the following tests you will need a MIDI cable a Control Voltage CV Pedal and an STC 8 E2PROM Storage Cartridge The ESQ M should be connected in Stereo to a sound system The ESQ M is heavily software dependent and certain events can cause the unit to glitch and contract a severe case of amnesia Sometimes these units merely require re initialization see Step 4 of this test procedure Since scrambled software can cause problems that at first glance appear to be hardware related the use of correlation modules particularly known good Keypad Display Board is strongly recommended 1 Getting To The Hidden Functions Page a Press Param and then Storage b While holding down Scroll press Master c The Scroll button can now be pressed until the desired function is reached 2 Initial Setup a Connect MIDI Out of the control keyboard to MIDI In of the E
51. of the new Line Filter Re connect the three wires to the Filter again noting the proper polarity Failure to connect the wires to their proper posts can lead to a potential shock hazard see Figure 7 7 Power up test the unit and close the front panel Replacing the Operating System EPROMs The ESQ 1 operating system can be updated by replacing the OS EPROMs Each ESQ 1 has two Operating System EPROMs located in the center of the Main board After replacing these EPROMs the ESQ 1 must be re initialized and the filters must be tuned The Sequencer memory is erased during re initialization so all sequencer data must be saved before starting this procedure 1 Remove all cables connected to the ESQ 1 including the Power cable 2 3 Remove the six 6 screws that fasten the metal Main board shield to the case and Remove the four 4 screws that fasten the control panel and raise the panel keyboard frame Disconnect the Display cable J4 the Power cable J11 and the Pitch Mod Wheel cable J12 from the Main board Remove the metal shield from the unit The two Operating System EPROMs U16 OSHI and U20 OSLO are located in the center of the Main board Carefully remove the two EPROMs and insert the Eee EPROMs into their respective sure the notch in both PR i w f f the E Power up ue the system and tune the Test the unit and then close the front panel ESQ Service Manual Plastic 33 Install
52. ollow the procedure described under Testing the Power Supply Unloaded see page15 before replacing it TRANSFORMER AND POWER SUPPLY VOLTAGE CHECK POINTS The proper AC Line Voltage for each ESQ 1 should be printed on the top of the Transformer Figure 3 shows the check points for reading the AC Line Voltage Figure 4 shows the connector terminal numbers and correct voltage values for the Power Supply and Transformer It is normal for Line Voltage to vary 10 4 Back of Unit WARNING There are dangerous Voltages present in this arca as well as in the Power Supply and Display Board To Power Supply Green Primary FIGURE 3 Wire AC Line Voltage Check Points ESQ 1 Metal ESQ Service Manual Metal 13 AC LINE VOLTAGE MEASUREMENTS See Fig 3 With the power switch OFF With the power switch ON the proper AC Line Voltage the proper AC Line Voltage should read from should read from 2B 1A 2B 1B 2B 3B 2B 3A 2B 1A 2B 2A 2B 3B There should be no voltage across the power switch POWER SUPPLY MEASUREMENTS On ESQ 1 systems designed for 115 VAC US operation there are three different Power Supply Transformer contigurations These configurations are denoted by both the label on the top of the Transformer and the part number silk screened on the lower left of the Power Supply PC board The three configurations are A Transformer labeled 001 and Power Supply labeled 4001004201 Transformer
53. oltage the proper AC Line Voltage should read from should read from 2B 1A 2B 1B 2B 3B 2B 3A 2 1 2B 2A 2B 3B There should be no voltage across the power switch POWER SUPPLY MEASUREMENTS The following chart lists the voltage ranges for proper operation of each supply fully loaded and the appropriate terminals to read across with the voltmeter refer to Figure 13 for terminal locations Designation Terminals Allowable range Units Digital Supply 1 3 13 5 to 16 5 VACrms Analog Supply 4 6 22 5 to 28 VACrms Display Filament 7 9 8 5 to 10 5 VACrms 5 Digital 11 10 4 75 to 5 25 VDC V Reset 12 10 2 7 to 5 25 VDC 12 Analog 13 14 11 7 to 12 6 VDC Analog GND 10 14 0 Connections are common VDC 12 Analog 15 14 11 4 to 12 6 VDC 5 Display 16 17 4 75 to 5 25 VDC V Display 18 17 24 5 to 29 VDC Center Tap Offset 19 17 18 to 23 5 VDC Filament 20 21 8 5 to 10 5 VACrms Filament to Center Tap 20 19 4 25 to 5 25 VACrms Bottom of Unit gt To Transformer 2 0A 250V To Main Board 2 0A 250V 1 5A 250V Fl 1 5A 250V 15 250V POWER SUPPLY N Part Number screened here FIGURE 13 Power Supply Voltage Check points ESQ M TESTING THE POWER SUPPLY UNLOADED If the Power Supply readings exceed the indicated tolerance particularly the 5 Digital line between terminals 10 and 11 it is possible that a defective component on the Main b
54. ow enters the Self test mode this indicates a Main Board problem If removing the four wire connector from the Display Board does not activate the Self test mode assuming all power supply voltages checked out properly this indicates a faulty Display Board 3 If the unit is In Self test mode but the display does not respond according to the above chart the problem is most likely in the Keypad or in the Display Board certain buttons do not function properly during normal ESQ 1 operation test them while the unit is in Self Test mode If the same buttons do function properly in Self Test mode then the problem is most likely scrambled software the unit must be re initialized as in Step 15 of the ESQ 1 Test Procedure page 5 When the Display and Keypad assemblies are receiving power from the Power Supply but are not in proper communication with the Main Board the ESQ 1 enters Self test mode in Self test mode the Display remains blank until you press the buttons on the front panel Pressing various front panel buttons will cause the Display to print characters underscore characters clear the screen etc The Chart below details how the front panel buttons are mapped in Self Test Mode SEQ 9 Master Down arrow Create Erase Clear Screen Space Tracks Select Clear Line 1 Internal 3 Record Clear Line 2 BANK 1 Storage Underscore at Cursor BANK 2 lt EDIT Underscore at Cursor A
55. r Supply Power Switch and the Line Fitter making a note of the correct polarities the replacement Transformer has a different Part Number than the original it may be necessary to replace the Power Supply as well See the section POWER SUPPLY MEASUREMENTS Metal page 14 for a complete listing of compatible Transformers and Power Supplies 4 Tilt the unit on its back to expose the four 4 rivet heads on the bottom of the case 5 Using 3 16 drill bit carefully drill the four 4 rivets until the heads fall off You should support the Transformer while drilling the last rivet to prevent its dropping out and possibly damaging something Check to make sure that no fragments of the rivets or the four washers are left in the case 6 Install the new Transformer using the four 4 screws and nuts supplied making sure to insert the bolts in from the bottom of the unit and to use the lock washers on the inside 7 Re connect the Transformer cables 8 Power up test the unit and close the front panel ESQ Service Manual Metal 20 Replacing the Pitch Mod Wheel Assembly The Pitch and Mod Wheels are replaced as an assembly along with the Pitch Mod Wheel panel and cable harness Care should be given to properly aligning the panel to the front of the ESQ 1 case 1 2 3 4 5 6 7 8 9 1 Remove all cables connected to the ESQ 1 including the power cable Remove the four 4 screws that fasten t
56. rd 4 Sustain Jack Test Plug the Foot Switch into the Sustain Ft Sw Jack and verify that notes sustain when the switch is depressed and follow their normal decay when it is released Failure indicates a Main Board problem 5 Sequencer Jack Test Plug the Foot Switch into the Sequencer Ft Sw Jack and verify that you can start and stop the Sequencer with alternate depressions of the switch Failure Indicates a Main Board problem 6 Cartridge Test Insert an STC 8 E2PROM Storage Cartridge into the Program Cartridge Slot Press the CART A button and verify that all four Banks can be selected and that none of the names are garbled Repeat step B for CART B Press the WRITE button and then select the Soft button above YES Select a location in memory to store the selected program The display should respond WRITING NEW PROGRAM and return to normal with no errors after 4 seconds Remove the STC 8 Cartridge Failure usually indicates a Main Board problem Check the Cartridge cable however to see that it is installed correctly stripe at pin 1 and that none of the connectors pins are offset or bent under 0 OF O NOTE In some cases a defective main board can garble the contents of the STC 8 If this happens reload the STC 8 from a known good ESQ 1 by copying the data from a good STC 8 over the garbled data See the ESQ 1 Musician s Manual for details 7 Keypad Test A After pressing INTERNA
57. rt keyboard cable Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that secure the control panel and raise the panel Remove the six 6 screws that fasten the metal Main board shield to the case and keyboard frame Disconnect the Display cable J4 the Power cable J11 and the Pitch Mod Wheel cable 12 from the Main board Remove the metal shield from the unit Place the unit upside down on a soft surface and remove the ten 10 screws that attach the keyboard to the case See Figure 10 for location of screws Carefully turn the unit right side up Raise the control panel and disconnect the Keyboard Ribbon cable J3 from the Main board paying particular attention to the polarity Remove the keyboard from the case by gently lifting up the front of it while pulling it toward the front of the unit Once the rear of the keyboard has cleared the control panel mounting tabs the keyboard can be removed from the keyboard cavity ESQ Service Manual Plastic 30 10 12 13 14 4 Front of Case Keyboard Side ESQ 1 Plastic Case Making note of the proper polarity remove the Keyboard Ribbon cable from the old keyboard and install it on the new keyboard Connect the Keyboard Ribbon cable to the Main board Be sure that the cable lies flat beneath the keyboard and is not pinched under the keyboard frame Insert the new keyboard rear first into the unit at the front of
58. s between 8 5 and 12 VDC at the output of the 5 Volt regulator between terminals 10 and 11 All other voltages should read as in the chart above If these readings are normal when the supply is unloaded then a problem with the Main or Display Board is usually indicated ESQ Service Manual Metal 15 HARDWARE NOTES The following items are hardware trouble spots identified with the hardware of the metal ESQ 1 Being aware of these points can save you time when troubleshooting the unit IMPORTANT Avoid stripping the End Caps when reclosing the Front Panel When reclosing the metal ESQ 1 s front panel after any repair procedure it is possible to strip out the holes in the plastic end caps by tightening the screws too tight To avoid this and thus avoid having to replace the end caps 1 Before closing the lid put a drop of Super Glue or other heavy duty adhesive such as LOCTITE Quick Gel in the four screw holes in the end caps 2 Install the four screws that hold the front cover tightening only until the lid is securely closed but no further When the glue sets the screws will hold the cover tightly in place 1 Shorting Leads Leads on the bottom side of the Keypad board can occasionally short to components on the Display Board causing the display and or the Keypad to behave erratically If the display functions properly when physically separated from the case lid but not when bolted down this is most likely the problem A
59. should only occur upon power up Due to a bug in the DUART chip O S Versions 3 0 to 3 2 could cause chronic SYSTEM ERROR 3 messages at power up Prior to software version 3 0 system errors were not displayed If the unit had a problem it would automatically go to the wake up screen and not give you any hints as to why No Display TROUBLESHOOTING AN ESQ 1 WITH A BLANK DISPLAY All wire harness connections and fuses OK YES Does the display self test pg 6 Display voltages OK YES Replace display board YES Hard reset as described in step 15 pg 5 Power supply voltages OK Test power supply unloaded NO now supply Does the sign on message appear Replace main board ESQ Service Manual Metal and Plastic 10 ESQ SERVICE MANUAL SECTION 2 Metal Figure 2 ESQ 1 Metal Exploded View CHECKING THE POWER SUPPLY Many ESQ 1 problems may be related to faulty Power Supply Transformer or Line Filter You should check these before trouble shooting the rest of the unit Plug the ESQ 1 in and turn it on Using a 2 5 mm allen wrench remove the four screws securing the front panel and raise the panel Check to make sure that all the connections are secure and correct After the ESQ 1 has warmed up for five minutes begin to test the voltages at the points shown in Figures 3 and 4 the voltages vary outside the allowable limits f
60. t the unit and close the front panel ESQ Service Manual Metal 21 Replacing the Operating System EPROMs The ESQ 1 operating system can be updated by replacing the OS EPROMs Each ESQ 1 has two Operating System EPROMs located in the center of the main board After replacing these EPROMs the ESQ 1 must be re initialized and the filters must be tuned The Sequencer memory is erased during re initialization so all sequencer data must be saved before starting this procedure Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Remove the keyboard see Section D ESQ 1 Metal You will find the two Operating System EPROMs U17 OSHI and U18 OSLO located in the center of the Main board Carefully remove the two EPROMs and insert the replacement EPROMs into their respective sockets Be sure the notch in both pops EPROMs is facing towards the front of the ESQ 1 Re install the keyboard see Section D ESQ 1 Metal Re initialize the unit see Step 14 page 5 Tune the filters see Step 11 page 5 Power up test the unit and close the front panel ESQ Service Manual Metal 22 ESQ SERVICE MANUAL SECTION 3 Plastic t MAN DOANG ESQ 1 Plastic Exploded Figure 6 CHECKING THE POWER SUPPLY Many ESQ 1 problems may be related to a faulty Power Supply Transformer or Line Filter You should check th
61. the ribbon cable and that the six wire cable is keyed eh tale Due to the variety of voltages that are required for the operation of the Display reversing any of the connectors to the Keypad Display board will damage components on the board The six wire harness is keyed to prevent this potential damage The ribbon cable is NOT keyed and it must be installed the same way it was removed If the 12 volts that this cable carries is reversed the voltage may be applied to data lines on the display processor resulting in the processor s untimely demise Remove the Volume and Data Entry slider knobs If you do not have a right angle screwdriver remove the Transformer as described in Section D and the Power supply as described in Section 6 Remove the ten 10 screws which hold the Keypad Display Board in place 7 The individual buttons are held in place by the Keypad Display Board insulator To prevent them from falling out when the board is removed place the unit on a soft surface with its front pane down 8 Tore assemble first make sure that the insulator and all the buttons are in place and that the display lens is clean 9 Install anew Keypad Display board and replace the ten screws 10 Replace the Transformer Section D and the Power Supply Section C 11 Re connect the six wire cable and the ribbon cable paying particular attention to polarity 12 Replace the Volume and Data Entry slider knobs 13 Power up test the
62. und screw located near the upper right corner of the board between J14 and J15 Pop the board from the five 5 white standoffs by squeezing the standoffs There are two 2 standoffs near the back of the board that are loose Save these standoffs for installation in the new board Do Not remove the release film from the adhesive pads of the standoffs Before installing the new circuit board make sure the cardboard board insulator is in place Insert the non adhesive standoffs on the new board NOTE if the unit came equipped with an SQX 10 or SQX 20 Sequencer Expander Cartridge it should be removed from the old board and installed on the new one It is recommended that this be done before the new board is fastened down 9 10 11 12 With the board tilted at a slight angle insert the jacks into the holes in the rear panel and snap the board onto the standoffs Secure the jacks with the nuts and replace the ground screw Carefully reconnect the Keyboard Voice Cartridge Display cable Power cable and Wheels cable and connectors Re install the Keyboard see Section D ESQ 1 Metal Power up test the unit and close the front panel Replacing the Display Board Remove all cables connected to the ESQ 1 including the Power cable Remove the four 4 screws that fasten the control panel and raise the panel Remove the six wire and four wire cable harnesses located on the left side of the Display board Not

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