MZ-1E14 Service-Manual GB - The Sharp MZ
Contents
1. ajajajaja eo OPES NES ION io eNO 25 lt gt 0 p uev ojnjnjniajwWnNielojo ajaj N SOS INST B elo 4 4 ooo iuo y eo uo m n n Da foot 21212122222 gy 9 G91 9 09 0910 jm jo ju j u u u fu TITO oo jojojo gt gt gt gt gt gt gt gt gt je c oo lt gt band Lal 4 lt lt lt mi MS UL lt lt lt Z PARTS CODE PARTS CODE ul a o ex E n lt a EXTERIORS ELECTRONIC PARTS PACKING MZ 1E14 _ SHARP SHARP CORPORATION Industrial Instruments Group Reliability amp Quality Control Department Yamatokoriyama Nara 639 11 Japan 1984 August Printed in Japan2. D000 5 MZ DISK YO SELECTOR i 9 The SIO of the 1F11 is enabled only when the CPU accesses the 1 O address of the MZ disk The table below shows the relation among address St 0 and Channel DATA Channel DATA Channel CWR Channel B CWR 6 BUFFER DRIVER Not only enhances signal driving cap city to the signal sent to the 1F 11 but reduced influences to ther CPU as i much as possible MA 7 1 11 interfacing signals 2 CPU CLOCK BUS MZ 700 CPU clock 3 85 MHz b CPUMT signal from the MZ 700 CPU c CPURD RD signal from the MZ 700 d CPUIORQ TORO signal from the MZ 700 S RESET eu o MZ 700 system reset signal ICE a 1F11 SIO chip enable signal g SU ala ee 1F11 10 control data select signal eee a s Shai 1F11 510 channel A B select signal The message 3 TROUBLESHOOTING 1 Troubleshooting procedure 0055 In the first place it becomes necessary to find out on which side the troublevis 1E14 or 1F11 Get the pro perly functioning 1E14 and 4F11 connected with the unit on at time to gt find out onion connection causes the trouble AINE 2 Described next are ibie causes which may occur when elther the 1 E14 or EU isinconnection U i mei AND ad 3 4 Problem e causes sby th d EM ROM starts ES apum S pa AMARE READY
3. 3 Write is not enabled nm Readisnotenabled Hr ig O CO Set the disk in the MZ disk and conduct test while the LOAD command is in execution 2 Check if read is enabled Check if the clock is on Pr ceed to troubleshoot the Examine the crystal read function LandLS393 u hai Check if the C disk has been set properly Check if RDDT input is on Replace the disk with the new one Uu Adjust off tr ck ar E TT replace the pad i PER formatting is jn enabled _ is turning on eee and off Examin the read amplifier or digital circuit Check if the clock is gt a 6 5 MHz MM oT 15172 Bate ies Failure in the SIO or the program Replace the crystal 4 2 with the new one E Procedure after this need to conduct test while writing ie er Check if NO inputs are on output is low les Failure in the 10 Examine the MEM demodulation circuit LE obs Failure in the 10 Check WEGA No of T 4 is low 2 gt ES Failure in the 1 504 heck if TXCA input is Examine the periphery YES of the LS393 Check if CL of the LS74 is high E WES Failure in the 1 504
4. MONITOR 92 503M gt does appear on the display wher power is turned on with the disk loaded i in the drive unit No operation can tak place including program wild Pyne eee ipe 3 2 Problem caused by the 1641 1 The motor does not start to run 2 Write does take place O Write protect error occurs at all times The message READY ERROR displayed The data written on the disk can not be read 3 Read is not enabled Troubleshooting procedure 1 E14 1 ROM does not start Check if power is on Connect the power supply Check if the Examine the LS245 is in action The MZ 700 monitor is MONITOR 1Z 013A Check ifthe of the ROM drea after E800 _does nat appear read with the M command Examine b periphery of the 1 53 bank areas after EBOO should b when power is not on Replace the ROM Check if E800 ka with the new ig 00 A Examine the bus line 2 No operation can take place Proceed to examine Check if the the ROM Step 1 ROM starts Check if the 510 access is successful Examine the 1 5541 and bus line Failure on the 1F11 side 1F11 a The motor does not start to run Con
5. M p anne xt m Check if WRPR SN of T 4is on Failure in the MFM YES modulation uice oh ois Examine the write line of the MZ disk drive p Es Procedure to examine the SIO bus line with the MZ 700 1E14 1F11 in connection An example to test proper connection of the bus line up to the SIO Write the interrupt vector in the write register 2 of the channel B and read it out of the read register 2 2 1 14 280 ASSEMBLER 22 004C QSCK 0 PAGE 01 7 01 0000 02 0000 QDC 10 CHECK PROGRAM 03 0000 O4 0000 210001 START LD HL 0100H O5 0003 114455 LD 55 06 0006 01 702 LD BC 02F H 07 0009 ED61 OUT lt C H 08 000B 2069 QUT C L 09 0000 ED41 OUT C B 10 000F ED51 OUT lt C D 11 0011 ED41 OUT C B 12 0013 ED78 IN 13 0015 D 14 0016 20E8 JR NZ START 15 0018 ED41 OUT C B 16 0014 ED59 QUT 17 001C ED41 OUT lt C B 18 OO1E ED78 IN 19 0020 BB CP E 20 0021 20DD JR NZ START 21 0023 C304E8 JP E804H 22 0026 23 0026 24 0026 END Immediately after the above test the control goes into the state of ready for monitor command if the SIO data have been read correctly that is the control jumps to 00AD f there is any failure the control goes to execute indefinite program looping In this case there may be a failure like open cable buffer failure or SIO failure in
6. MZ 1E14 SHARP SERVICE MANUAL CODE 00ZMZ1E14 E move MZ 1E14 CONTENTS s SpBbificatiOn a ana ee kh ui Sard rien ee lee 1 1 General specification 1 2 Buttered signals 22 ar re a s ane Q ET dS LEE Block diagram u credo quedam be ern ET ieee eee 221 Block diagrari ss irae rs veu Tre bukan Q Su eem O D ted e x 2 2 Description ione uu live nex u wae ate Sees Meh Troubleshooting ve aub eres EUR p cat 3 1 Troubleshooting procedure 3 2 Problem caused by the 1 14 Circuit diagram EAS a is Part amp signal layout u rr a gt Parts guide ilu a en ew EU dae v evi exe tee QS SHARP CORPORATION MZ 1E14 1 SPECIFICATION 1 1 General specification Pin configuration See the wiring diagram for detaii of bus line connector and the SIO connector Signal level TTL level input output electrical characteristics shall conform to the IC used Input output ICs used specification SN74LS00 SN74LS02 SN74LS04 SN74LS10 SN74LS30 SN74LS74 741 138 SN74LS541 2732 ROM Supply voltage 5 5 external power supply not needed when used in conjunction with the 1F11 MZ 700 1 2 Buffered signals The following signals ar
7. the worst case MZ 1E14 4 CIRCUIT DIAGRAM seis BON D8 ps n X r2 771 7 E FT gt Km zur hag MER d Lige Jor Af PCM ji 17 cad ICH sonst yi mi RU eo m duo ils 2 ili 90000000 N Tore ma T 7 CONNECTOR 7 128 1502 AT ale D e 0 AS lag IC9 4C IC8 1502 5 ees ii q yt BED 1 500 MZ 1E14 5 PARTS amp SIGNAL LAYOUT e e 6 635090900 T P d T n A 2 1 14 6 PARTS GUIDE i A C1 2 04 9 DESCRIPTION DESCRIPTION am o or 5 Ef o 21 miu e o 5 o Case Bag Bag nstruction book Disk basic Disk Basic Bag nstruction Book Instailation nstruction book QD Basic Leg For Cabinet abel Insulator crew M3X6 onnector onnector apacitor Packing Cushion Packing Pol Pol Pol loto ells o ole lt lt lt lt lt lt NNNNN NNNSNN 1 l PART RANK E Master Disk um jo fee zx lt lt amp m m al lt a x i NUNININTNININIOIN 02 02 ol Alf NEW MARK ANK PRICE NEW PART RANK MARK RANK _ PRICE loo INN NN
8. duct test while the LOAD command is in execu tion Check if DTRB of the SIO is low NO YES Failure in the program or the SIO Check if MTON of T 4 is low Defect in the circuit pattern Check if the BUSY lamp is on NO Check if 2 pin ne Control Board SE ron IC6 is low 7 Examine the TR2 and IC3 of the Control Board 2 1 14 b Write is not enabled 1 Write protect error occurs at all times Set the disk in the drive Check if the write protect tabs NO lt ot ihe disk is broken Check if CTSA of the SIO is low YES NO Replace with the disk YES whose write protect tab is not broken Check if WRPR of T 4 is low Check if other YES ega NO lt __opsration E permitted Replace the LS14 Replace the SIO with the new one Check if the lt table y Put the cable connection into connection Examine the write protect switch of the drive unit 2 The message NOT READY ERROR displayed Set the disk in the drive if NO of the SIO is low NO Check if CPU bus line is functioning properly 7 Failure in the buffer cable Defect in the SIO Check if the cable is in connection Put the cable into connection Examine the MEDIA Switch of the drive unit ot MZ 1E14 T m T
9. e buffered by the 5 741 541 IORO RESET RD CE 1 50 M1 2 BLOCK DIAGRAM 2 1 Block diagram DO D7 CPU D0 D7 CE M1 CYCLE CPU WAIT ROM READ 1 WAIT E A0 Ail B my ROM ADDRESS TO 1F11 DECODER CPU CLK BUS lt em BUFFER CPU RD DRIVER ROM 4KB CPU RD cru T CPU TORQ 1 MEMORY BANK SELECTOR 50 CPU WR RESET CPU TORQ 1 2 1 14 2 2 Description 1 ROM The MZ disk monitor routine program is contained in the ROM It locates on the MZ 700 VRAM key side bank dominating the 2 KB addresses of E800 through EFFF Even though the 2732 ROM has a 4 KB capa city only 2 KB are used actually The MZ 700 monitor ROM reads the contents of E800 to check if it is 00 1f so the control advances to E800 for execution 2 M1 CYCLE ROM READ 1 WAIT This block is used to insert a single wait during the M1 cycle op code fetch of the Z 80 CPU in executing the contents of the above ROM as it uses the memory of relatively sl w access while a faster memory is required for the memory read in the M1 cycle ROM ADDRESS DECODER This block enables data output of the ROM when the VRAM side bank has been assigned at 4 and that the CPU has executed the read operation to the address E800 through EFFF MEMORY BANK SELECTOR Performs to select the memory bank Only when the MZ 700 has chosen the VRAM side bank it makes bank output enabled 3 4
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