AMSTRAD PPC 512D Service Manual Download Page 16 | Manualshive

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Summary of Contents for PPC 512D

Page 1: ...PPC512S 512D PPC 640S 640D PERSONAL PORTABLE COMPUTER SERVICE MANUAL ...

Page 2: ...rives IMPORTANT NOTES TO SERVICE ENGINEERS This Service Manual gives indepth technical information on all of the circuits and the P C B s which make up the PPC51 2 640 Much of this data is for information purposes only as the procedure engineers will follow when servicing this equip ment will often be to exchange Printed Circuit Boards In some instances Amstrad will insist that subassemblies are r...

Page 3: ...oft error 5 Wrong motor speed is another cause of soft errors Take the following steps on the controller side to recover from the soft errors mentioned above 1 Read the track again ten times or until the data is recovered 2 If Step 1 above fails to recover the data access the adjacent track Then return the head to the original track 3 Repeat Step 1 4 Any error that cannot be corrected by the above...

Page 4: ... 6 PCB index detection circuit Repair 2 Not ready 1 See Item 1 2 PCB ready circuit Repair 3 Track detection failure 1 Track 00 assembly Replace 2 PCB track detection failure Repair 4 No seek 1 Stepper motor Replace 2 Guide shaft contamination or damaged Replace 3 PCB stepper driver circuit Repair 5 No WRITE 1 See Item 1 2 Head disconnected Replace 3 Head shorted Replace 4 PCB write circuit Repair ...

Page 5: ...t the specifications in the table 5 2 Write Protect Verification 1 Check that the exerciser s write protect lamp goes on and off as a media is inserted and removed as specified in the table below Media with write protect hole open ON Media with write protect hole closed OFF 5 3 Head Output Verification Use a new diskette if possible to identify head failure for this check 1 Insert a good diskette ...

Page 6: ...ic information on tracks and sectors as far as the program permits Install Exerciser on FDD Power SW DCSWON MOTSWON Drive Select SW ON YES Set Address SW to Track YES Write SW ON YES Write SW OFF YES FDD online test rCheck Item 4 Table 3 1 NO Check Item 5 Table 3 1 Check Item 6 Table 3 1 ...

Page 7: ...he mounting screws See Fig 5 2 8 Step the head outward track 0 and inward track 40 or 79 and confirm that the adjustment has been completed 9 After the intitial adjustment be sure to confirm track 00 sensor adjustment 5 8 and carriage limiter 5 9 l I 1 l 1 s U 44 1 U III 1 i W C li U 1 II 1 E M M i 4 U 1 A B 8 A X 100 X 100 Fig 5 2 Radial Alignment Waveforms CATS EYE Note Alignments on sides and 1...

Page 8: ...sure as shown below 4 Confirm that the measured value meets the specifications in the azimuth column of Table 4 1 B C A m Ui LAI D IT Azimuth 0 waveforms Case of B C B C Azimuth x A B u A CE 30 DAD 15 Case of OB C B Azimuth x A a Fig 5 4 Azimuth Waveforms 5 7 Index Burst Verification and Adjustment 1 Insert an alignment diskette Seek to the track specified in the l B column of Table 4 1 2 Set the ...

Page 9: ...2ms seek 3 Loosen the track sensor screw and adjust until the waveform on the oscilloscope appears as shown in Fig 5 6 ADJUST A B TO 1 1 Fig 5 6 Track Waveform 5 9 Limiter Verification 1 Seek to track 0 2 Write 2F data on track 0 and measure read level 3 Seek to track 1 and check that the head just touches the limiter 4 Check that when the RECAL switch on the exerciser is pushed ON the head return...

Page 10: ...he value as shown in Table 4 1 Asymmetry wave form might be reversed up and down from model to model ALIGNMENT CASSETTE 3 5 inch Alignment Diskette TP1 P N Index Burst Azimuth Radial Alignment MODEL 135 DAD 135 CE JU 01AA 817 363CE 40TRK 40TRK 40TRK JU 252A JU 253A V MEASUREMENT ITEMS TABLE 4 1 10 Item Parameter JU 252A 253A TRK Value 1 Index Period 40 200 2ms 2 Output Level 79 80mV or more 3 Radi...

Page 11: ...TEST POINTS r u u Q D 11 ...

Page 12: ...EXPLODED VIEW 1 12 ...

Page 13: ...EXPLODED VIEW 2 13 ...

Page 14: ... 5 1 Si I I I I 1 J n m jL hW I CO U 1 I u sp ON9 SO AS il ou St id j Ob 0 IB IS n BHHHHH jii i n Si 10 ut ALIGNMENT INSTRUCTIONS FOR PPC5 12 640 Equipment required Digital Multimeter D B O Scope Diagnsostic Disc Tool Step FUNCTION SIGNAL IN SIGNAL OUT METHOD REMARKS 1 Set RTC X 103 Connect Odometer to Pin 21 IC134 Set Odometer to 0 2sec Day Adjust it to read 0 00 with TC1 01 Do this adjustment on...

Page 15: ...FD 5 SCHEMATIC DIAGRAM TRACK ZERO DRIVE SELECT 3 2 I 1 53 SIDE SELEC DIRECTION S WRITE GATE WRITE DATA GND l d n S GND c3 oso l_JI WD UN2215 Jf ...

Page 16: ...MM OF CONTROL BOARD I 1 DISK CHANGE READY 0ISKIN a J L4 150iJH 15 ...

Page 17: ...20 11 Lid Battery 177221 1 77222 12 Handle 177223 1 77224 13 Lid Key Board 177225 177226 14 Cabinet Top Key Board 177227 177228 15 Screw Cap 177229 177230 16 Stud A 177231 1 77232 17 Stud B 177233 177234 18 Cabinet Bottom Key Board 177235 177236 19 Knob Slide L 1 77237 177238 20 Knob Slide R 177239 177240 21 Holder Slide Knob 177241 177242 22 Spring Slide Knob 177243 177244 23 Super Twist LCD Scre...

Page 18: ...a I it i T O 8 M e t a n mn X uD ED O ru ID Q EH u i 4 1 ii m s ru i 1 f w 2 t mi z Tt 1 1 if 2 s I 2 iii fX a 8 8 i e 13 ...

Page 19: ... n CO 6 a cc Hi CD I 17 ...

Page 20: ...MEMORY FUSE VOLUME P C B e Z 18 ...

Page 21: ...MEMORY FUSE VOLUME P C B IT1 mmm m ooo r 2 M _ n n 19 ...

Page 22: ...MODEM P C B COMPONENT LAYOUT l iil yyL f s sail 3 01 raw n ami RS w _ DSI2 V JJ949 K t3 t J 949 J t Qjwg W SCC924 H Ml W IC9IS I QMS Hh Ih H912 RI705 V 0 20 ...

Page 23: ...ND Y K RETURN INSERT PAGE UP X3 2 3 4 R 7 2 r HOME 7 HOME 3 PGUP X3 X2 F1 F4 5 G 3 PRINT SCREEN PAUSE BREAK X2 X1 ESC F2 F3 F5 FG F7 F8 F9 F1Q F12 SCROLL LOCK NUM LOCK Y2 Y3 5 Y6 Y7 8 Y9 Y12 K 1 THESE TWO KEYS X8 Y2 X5 D Y9 PRESENT IN 102 KEY VERSION ONLY 2 THIS KEY X3 Y9 PRESENT IN 101 KEY VERSION ONLY 3 THIS POSITION X8 Y10 UNUSED IN BOTH 101 AND 102 KEY VERSIONS KEYBOARD SW801 ESU24LN573AA D IT...

Page 24: ...IEMATIC DIAGRAM J si tUr gl ut 8T ST PCB101 MC005U 21 ...

Page 25: ...CHASSIS SCHEMA MAIN PCB 22 ...

Page 26: ... 2 o Q o CM Q in O PI t V CD c LO 1 LP CM CM CM CM m CM m m OJ n LP CO P CD en PCB501 MC0O52A ...

Page 27: ...RAY A19 40039 BA19 A18 BAI8 A17 BA17 A18 BAtS 30 f55 ADtS ADM ADI3 ADI2 ADI1 A010 ADS A08 AD7 ADfe AD5 A04 AD3 ADS BADIS BAD14 BA0I3 BAD12 BAD11 BA010 BAD9 BADS 8A BAG BA5 BA4 BA3 BA2 BA BAO NOMACS NINTCS NPITCS NFDCS NSIOCS o Q a a z z z z o 5 si in 27 1 9 13 5 2 16 O gj g P P1 Mm 3 SE 4 8 57 0 01 5V ES 22 43 1 100 T 1 CS01 CE10 CB13 CEI5 CSI9 CE20 C622 CB23 CS2S CG2S CB27 CS30 CE31 CB33 CBS9 CBS...

Page 28: ... 0 7 87 6 9 88 0 2 89 0 2 92 6 1 95 5 2 96 6 5 97 4 7 IC159 VOLTABE PIN PIN PIN 1 5 2 11 2 8 21 1 3 2 5 2 12 2 8 S 4 1 3 0 3 13 2 8 23 4 i O 14 54 S 4 5 6 3 15 0 7 25 0 9 6 1 1 16 a f 29 5 2 7 3 02 1 11 3 TT S 2 8 2 8 18 0 8 SB 5 2 9 2 9 19 0 4 10 2 9 26 6 IC129 VOL PIN PIK TAGE 1 S 2II1 2 2 T i f i2 0 9 3 5 8 i 3 0 9 4 S J1 l 11 0 51 0 5115 5 1 T 1 0 18 1 3 r 5 1119 0 6 8 0 9 l 0 4 T 6 3119 6 ITT...

Page 29: ...CHASSIS SCHEMA CX 01 LM1 TO MODEM CX902 PLM2 TO MODEM PO ER EXT PSU P C B PLM 73 24 ...

Page 30: ...DM 5T2 5T2 BADIO 6A09 T 5T 5 2 C BADB S 2 18 9 5 2 1 12 5 2 1 5 S 2 5 S 2 2 S 2 A14 A13 ITg ICI22 74LS373 NR1D5 4 7K NMEMR NXIO RESET 3 ICI28 HCU04 NEOP 3 X 4 EOP IC11S HC244 TJT ICI15 HC244 1R32 IRQ5 DISPLAY NWI s SKT AS A16 AS A19 A7 A20 AS A2I BIO B29 B11 B30 B12 B31 NDACK2 B21 B3 B22 B4 923 A1S 824 PRQ2 SKT B37 H2V sv 12V 20V B17 B18 5 B PCB 101 MC005IA TTJ SHEET 4 ...

Page 31: ... 20KB l ft SP401 SPEAKER LES PIECES REPAREES PAR UN A ETANT DANGEREUSES AN POINT DE VUE SECURITE N UTILISER QUE CELLES DECRITES DANS LA NOMENCLATURE DES PIECE5 CAUTION SINCE THESE PARTS MARKED BY A ARE CRITICAL FOR SAFETY USE ONES DESCRIBED ON PARTS LIST ONLY ...

Page 32: ...CHEMATIC DIAGRAM JD102 parallel PRINTEm PORT PLM 52 T0 MEMORY PCB DISK CHANGE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME F PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE 25 ...

Page 33: ... 05K 2SDlfc i f MONITOR DAMY LORD R5zr Wv D58 H PCB1I3 MS 3 NOTE FSKQte IS SCHOTTKY HD0e IS 1R SCHOYTKY 11E0SBJTR1 CTBPING 1 05 5 2SB8Z5 2SB1443 FULL PC CHUTIDN SINCE THESE PORTS MARKED BT A ARE CRITICAL FOR SAFETY USE ONES DESCRIBED ON PORTS LIST ONLY BTT TION LES P OONGEI N UTIl DPNS I 26 ...

Page 34: ...DRIUER zeuis x c e B50 3 RS44 vw TO MAIN PCB RLORM PLM TO SPEBKER CCT 7 C541 St PLM EXT PSU 73 PCSSB1 MCBB5ZA TTENTION LE5 PICCE5 REPBREE5 PBR UN A EThNT OBNGEREUSES BN POINT DE VUE SECURITE N UTILISER QUE CELLS DECRITE5 DBNS LB NOMENCLATURE OES PIECES THIS SCHEMATIC DIBCRhM IS THE LHTEST H7 THE TIME OF PRINTING HNO SUBJECT TO CHRNGE UITHDUT NOTICE ...

Page 35: ...MODEM CHASSIS SCHEMATIC ...

Page 36: ...PI P1B Pll P12 3 m 5 CK2 INB f Tni IN3 2 IN4 1 MRS BRS RD79 RPCn LP6 BB OBI 082 DB3 DB4 DBS 086 IP 0B7 4b 5 2 3 5 2 5 5 1 It 01 11 3 B t R9d9 vw 5 2 It 5 1 29 Bfl T MCB MCI MC2 MC3 MC4 DIR BIO RD XIBL2 XTRL1 C CTS BCD RONS DGNB 2 SI I RC71 BEGO LPBK M II 51 3 t 55 3 9 R1t2 WV 54 2 R957 VA R 5B RISt WV 1 R95t R959 4 7K Wr RH5 R9t6 R1i 2 2K PCB901 MC0O53A 27 ...

Page 37: ...MODEM CHASSIS SCHEMATIC DIAGRAM 2 RD 4 L 28 ...

Page 38: ...4 8 a s 1 5 9 8 82 11 B 3 Js e 83 6 8 84 17 e 2 15 IB VII I I I I III J5 Qs J 33 6 2 8 R H N in t j P0 H mcvj9aiC jN tjcsj rrrn T iTm B Bl 8 81 B 8 8 B if 4 zr zr 17 r i IC903 w m tn mr 3 tie J7 2 22 26 B Bl 6 1 B Bl B Bl B 2 8 3 6 1 6 5 0912 Q9B1 U9 4 1 2 4 5 6 E C e E C B 6 6 6 2 e B l 6 8 8 6 63 6 B B l H 13 Q9B2 0L987 1 2 4 5 6 E C B E C B 6 8 8 2 B 8 1 B B B Bl B 5 2 B H914 1 2 4 5 6 B 2 B l ...

Page 39: ... R919 177350 27kft R188 177351 43kft R937 177352 47kft R931 177353 68kft R930 177354 82kft R938 177355 100kft 1 6W R146 147 1 77356 110kft R936 177357 430kft 1 6W R144 1 77358 560kft 1 6W R145 177359 Description Circ Ref Part No Metal Oxide Resistors 10ft 1W R510 177360 10ft 2W R543 1 77361 1 50ft 2W R540 1 77362 220ft 1W R523 177363 Cement Resistors 10ft 5W R501 1 77340 Variable Resistors VR101 V...

Page 40: ...177289 LC504 IC L79M12T 1 77290 IC505 IC TA79L020P 177291 IC801 ICAMS40112 40112 IC802 IC LC74HC14 171033 IC803 ICLC74HC175 177292 IC901 IC R5325 177293 IC902 ICR5310 177294 IC903 IC 10464 177295 IC904 IC LM348N 177296 IC908 IC TC74HC4053AP 177297 IC909 ICAM791P 177298 IC910 ICHD63A01V1G93P 177299 IC911 ICAMSTRAD 40102 40102 IC912 ICAMSTRAD 40135 40135 IC913 IC LC74HC373 177300 IC916 IC LC74HC30 1...

Page 41: ...nter 171438 LCD101 LCD Super Twist Display 177245 NR101 105 Resistor Network 4 7kfl x 8 171670 NR102 Resistor Network 1 kfl x 4 177328 NR104 111 Resistor Network 2 2kfl x 8 177329 NR801 Resistor Network 1 kfl x 8 171058 SP101 Speaker 171370 SCR501 Thyristor SF5B42 177331 TC101 Trimmer Capacitor 200pF 171371 X101 Crystal HC49U 843M 171372 X102 Ceramic Oscillator CSA16 00MX7 177332 X103 Crystal DSVT...

Page 42: ...AMSTRAD PLC BRENTWOOD HOUSE 169 KINGS ROAD BRENTWOOD ESSEX CM14 4EF Telephone 0277 230222 Telex 995417 AMSELE G ...

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