Philips-FW-21-Schematic(1) 电路图 维修手册.pdf

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1、ELEKTRONIKIELEKTRONIKI ELEKTRONIKIELEKTRONIKI ELEKTRONIKIELEKTRONIKI ELEKTRONIKIELEKTRONIKI ELEKTRONIKIELEKTRONIKI ELEKTRONIKIELEKTRONIKI ELEKTRONIKIELEKTRONIKI ELEKTRONIKIELEKTRONIKI T1 T2 5251 2251 22 3251 2255 3255 56k 4 L 3 BB BBBB 3253 470E 2253 100 2267 100p 560p 2265 ! 3283 100E +VCC 47 50V 2

2、286 12 2277 47n 3261 56k 11 13 T22 1251 5253 B 2259 100n ! T18 1 2 3263 4.7E T19 LEFT SPKR 6 OHM CIRCUIT BREAKER 2269 100p 2273 100p 2271 100n 3265 4.7E ! 2257 47 B 3257 2.2k 3284 220E 2W ! 18 17 15 7 4 3259 2.2k 3260 2.2k 5 3258 2.2k 10 2258 47 T23 1252 CIRCUIT BREAKER 5254 2274 100p 2272 100n 2270

3、 100p B 3266 4.7E ! 8149 -VCC B 3280 1k 3262 56k 2276 47n 22 63V 22843281 1k 2 1 2254 100 BBB 3254 2266 560p 470E 2268 100p 3256 56k 2256 3252 -VCC 2252 2.2 3 6 B B B 6320 1N4148 T4 313282 2.7k 2282 10 3286 22k 16 T3 2 1 R MUTE 2 I272TO VOLUME PCB 2260 100n ! T21 T20 3264 4.7E 3 4 RIGHT SPKR 6 OHM +

4、 - + - +VCC! T24 2321 100n 2322 100n 2324 100n 2323 100n T25 2320 100n T26 2300 +- -VCC 2301 T27 T28 A 13211320 11 22 33 44 55 10 9 8 7 6 5 4 3 2 1 T5 T6 T7 T8 A ! 7304 BD675 2317 470 25V 3305 100 ! 3304 2.7k 2308 470 25V 3316 33k 3306 2.2k DDD 2318 10 25V 6308 C13V 3314 39k 7303 BC558B 2303 10 6309

5、 C6V8 3313 2.7k 3315 10k 7302 BC548B 7300 BD234 ! 3301 68E 2302 3303 56E 3302 68E 3312 2.2k 2306 1n 7301 BC548B 3321 4.7k AMD 3317 10k 2309 2.2 2313 470 63v 3310 3.9k 3311 47E ! 6312 C15V 6311 C13V 2314 22 63V 1000 35V 2315 3320 10k 6318 C3V9 6313 C3V9 2316 1000 10V 22V DC 3-5V AC T14 T13 T12 T11 T1

6、0 D M T9 STDBY +14V PD +13V -30V AC AC 32 3319 2.2k 22V DC 1270TO SELECTOR PCB 7306 BD236 ! T15 T16 T17 -VCD +VCD CD TO CD MODULE 3 2 1 2305 470 16V 1322 2304 1000 16V ! 3307 100E 3318 1k 6317 1N4148 6314 C5V1 6315 1N4148 6307 1N4148 2335 100n 2312 470 50V 2332 100n 2333 100n 2334 100n 2331 100n 1N4

7、002 63046306 1N4002 63036305 1N40021N4002 2330* 100n ! 1309 T43 CC 14 2326 100n 2325 100n 6301 1N5392 6302 1N5392 2329* 100n 1308* 1304* 1306* 1305* 1303* 13 12 11 10 9 8 T39 T38 T37 T36 T35 T34 ! ! ! ! ! CC CC CC CC CC CC CC T33 T32 T31 T30 T29 CC CC T42 T41 T40 AC AC CT P ! *1301 *1302 ! 15 16 17

8、! 1 2 3 4 5 6 7 3308 10M T45 FOR -/37 120V VERSION ! 1261 N AC L AC 120V 1 2 3 4 5 6 7 120V 20V 0V 120V 0V 240V 20V 0V 120V 0V 1307 ! FOR -/25, -/30 240V VERSION ! 1261 240V CC CC CC CC CC CC CC 1 2 3 4 5 6 7 FOR -/20, -/22, -/28 220V VERSION ! 1261 T43 T44 220V 1 2 AC AC 1 2 3 4 5 6 7 120V 10V 0V 1

9、20V 0V ! 1261 1262 ! 230V 120V 120V/ 230V 1260 + - + - ! 7251 STK4122 5001 ! PART B POWER AMP PART A POWER SUPPLY Pin NoITEM NO 730073017302730373047306 21.5V 20.8V 14.0V 0V 0.6V 20.6V 0V 0V 0.9V 6.7V 6.2V 1.3V 13.0V 12.3V 21.5V -30.0V -29.2V -47.2V e b c TRANSISTOR VOLTAGE ITEMSFW20FW30FW40 7251 63

10、00 2300 2301 STK4112 D3SB - D5SB STK4132 D5SB 3300 /25V 3300/35V 1251 1252 1.75A2.0A2.5A 3251 3252 22k10k3.3k 2255 2256 100pF270pF680pF 23022200F3300F NOTE FOR ITEMS MARKED FW40 1301 1303 1305 1308 1302 1304 1306 1307 1309 Item marked * All versions except /37 All versions except /37 /37/37 Other ve

11、rsion /33/37 FW30FW40 2A 1A 0.63A 0.63A 3.15A 1.25A 1.25A 1.25A 3.15A 1A 0.63A 0.63A 5A 1.25A 1.25A 1.25A 4A 0.63A 0.63A 4A 1A 0.63A 0.63A 5A 1.25A 1.25A 1.25A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 -0.1V -0.1V 0V -13.4V -1.2V 0V -15.5V -16.0V -16.2V 0V 16.4V 15.3V 0V -16.2V -1.2V 0V -0.1V -0.

12、1V -0.1V -0.1V 0V -18.5V -1.0V 0V -21.3V -22.0V -22.1V 0V 22.1V 21.0V 0V -22.1V -1.0V 0V -0.1V -0.1V Pin NoFW20FW30 IC 7251 VOLTAGES -2A-2A-1.6A2A g a m b c n d e r p k j h f NEWSNEWSSLEEPSLEEPSWSWLWLWMWMWAWAWPMPMFMFMSTEREO EDIT STEREO EDIT PAUSE kHz MHz PAUSE kHz MHz REPEATSHUFFLEAUTO PROGRAMRECORD

13、DOLBY BTIMER 12REPEATSHUFFLEAUTO PROGRAMRECORDDOLBY BTIMER 12 TUNERCDTAPE 12AUXTUNERCDTAPE 12AUX 10G9G8G7G6G5G4G3G2G 1G (10G 3G) GRID ASSIGMENT 10G9G8G7G6G5G4G3G2G1G aP1aaaaaaa j, pP2j, pj, pj, pj, pj, pj, pj, p kP3kkkkkkk hP4hhhhhhh bP5bbbbbbb fP6fffffff- mP7mmmmmmm- gP8ggggggg-(TIMER) cP9ccccccc-(

14、TIMER) eP10eeeeeee- rP11rrrrrrr- nP12nnnnnnn-TAPE dP13 P14 ddddddd-TAPE - -P15- -P16- NEWS SLEEPSWLWMWAMPM FMNEWS SLEEPSWLWMWAMPMFM TUNER 2 1 TAPE AUX 2 1 TIMER DOLBY B RECORD TUNER 2 1 TAPE AUX 2 1 TIMER DOLBY B RECORD PROGRAMPROGRAM AUTO SHUFFLE REPEATkHz MHz PAUSE EDIT STEREO CD AUTO SHUFFLE REPE

15、ATkHz MHz PAUSE EDIT STEREO CD ANODE CONNECTION F 1 F 1 N P N P N C N C N C 1 0 G 9 G 8 G 7 G 6 G 5 G N C 4 G 3 G 2 G 1 G N C P 1 P 2 P 3 P 4 P 5 P 6 P 7 P 8 P 9 P 1 0 P 1 1 P 1 2 P 1 3 P 1 4 P 1 5 P 1 6 N P N P F 2 F 2 123456789 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2

16、7 2 8 2 9 3 0 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 CONNECTION PIN NO. 1401 P37(65) P36(64) P35(63) P33(61) P34(62) P32(60) P31(59) P30(58) P87(57) P86(56) P85(55) P84(54) P83(53) P82(52) P81(51) P80(50) P77(49) P76(48) 2469 100p D P75(47) 2468 100p D P74(46) 2467 100p D P73(45) 2466 100p D P72(44) 24

17、65 100p D P71(43) 2464 100p D P70(42) 2463 100p D P67(41) 2462 100p D P66(40) 2461 100p D P65(39) AC 2 AC 1 -30V +5V GND D 3460 1k 2460 100p -30V +5V 7460 BC546 3461 100k NC -30V -22V +5V 5V -22V = ANODE PIN = GRID PIN = FILEMENT PIN = NO PIN = NO CONNECTION Px xG Fx NP NC LEGEND FROM 3139 118 80 93

18、 SH 2 OF 2 NOTE: NUMBER IN (*) ARE PIN NUMBER OF 7400 USE ALSO:- 3139 118 8093 SH130-2 3139 118 8093 SH130-3 FRONT CIRCUIT II ! 85 RAM INTERFACE A12 21 25 A8 A11 20 24 A9 A10 19 23 A11 A9 18 21 A10 A8 17 2 A12 A7 16 3 A7 A6 15 4 A6 A5 14 5 A5 A4 13 6 A4 A3 12 7 A3 A2 11 8 A2 A1 10 9 A1 A0 9 10 A0 WE

19、 22 27 WE D0 1 15 I/04 D1 2 16 I/05 D2 3 17 I/06 D3 4 18 I/07 D4 5 19 I/08 D5 6 13 I/03 D6 7 12 I/02 D7 8 11 I/01 SUBCODEERCOCONCEALMENT DIGITAL FILTER 4x S/P CONV. 48x UP NSHAPE DIFT. LEFT DAC SUMMING OP-AMP S/P CONV. 48x UP NSHAPE DIFT. RIGHT DAC SUMMING OP-AMP DIGITAL OUTTIMINGKILL DATA SLICER DE

20、MOD PHASE DETECTOR VCO MOTOR CONTROL AM MIC. PROC. INTERFACE 39 HFT 34 HFD 36 PD 37 OC 66 TEST1 67 TEST2 68 TEST3 69 TEST4 74 TEST5 75 TEST6 76 TEST7 77 TEST8 78 TEST9 CFB HF1 26 MHAL 28 PWMA 29 PWMB 30 MACC 31 MBRA 33 VSSD 27 VDDD 79 VDD 32 DOBM 73 VSS 71 XIN 72 XOUT 70 ST 59 NC6 58 NC5 65 KTC 64 K

21、O 49 DE1L 47 DE2L 54 DE1R 56 DE2R 43OUTL 63DEEM 48VSSL 55VSSR 50VSSDACL 53VSSDACR X-TAL CLOCK + - 3140 100k 3141 100k +5 +5 2112 100n 3105 3.3 3143 22 2140 100n 2141 47n 5 6 3 3142 47k 3148 47k 3147 3.9k ! 3146 10k 7141 BC848 7140 BC858 3144 22k STANDBY FROM PIN 10 OF IC7700 PWMA FROM PIN 13 OF IC77

22、00 +5 -10 2114 47p 2115 47p ! 3110 1M 1570 16.9344MHz 3119 560 STANDBY FROM PIN 10 OF IC7700 2116 1 50V 2117 4.7n 3117 1.8k 3118 1.8k 2118 4.7n + - 5 6 3 4 3311 18k 3308 12k + - 3 2 1 8 3326 15k 3325 15k 3327 15k 3310 15k 3309 22k 2309 270p 2310 330p 3307 3.3k VREFA 13 X-TAL OSCILLATOR DIVIDER PREPR

23、OCESSING CONTROL FUNCTION OUTPUT STAGES CONTROL PART MIC PROC INTERFACE V REF GENERATOR A/D CL CLCLCL CL CL VRL8 D37 D26 D15 D49 R110 R211 VRH4CL 27 SIDA 21 VssD 3 VssA 26 SICL 25 SILD 1 NRST 14 TS1 15 TS1 XTLR 19 XTLI 18 XTLO 28 VddD2 20 VddD1 12 VddA 2009 100n 2010 22 16V 3008 3.3 +5 2016 100n 201

24、7 22 16V 3013 1k 3012 1k Uref +5A 2011 100n 2012 33 16V 2018 100n +5 ! 3007 3.3 3010 10k 1002 8.46MHz 3009 1M 2005 220p 2008 220p 2004 220p 2007 220p 2003 220p 2006 220p 3002 10k 3000 10k 3001 10k 3005 10k 3003 10k 3004 10k SD2 SD3 SD4 D5 D1 2001 560p 2000 1.5n FROM CDM SIDA SICL SILD TO PIN6-8-9 OF

25、 IC7700 3017 1k 3011 10k FROM PIN 10 OF IC7700 NRST + - 5 6 3 2 2080 100n 2081 22 16V 1020 T160mA ! +10 3081 4.7k 3080 6.8k 2086 3.9n +5 3085 10k 3082 15k Uref 2082 100n 2083 22 16V 1021 T160mA ! -10 4 2084 180p 3087 15k 19 3086 22 ! 2085 100n 7080B TCA0372 1052-3 1052-2 + - 8 7 1 2 2060 100n 2062 3

26、3 16V 3067 1 ! +10 3061 6.8k 3060 7.5k 2064 33n +5 3063 10k 3062 15k Uref 2065 100n 2063 33 16V 3066 1 ! -10 4 2066 2.2n 3064 15k 23 3065 22 ! 2061 100n 7660A TCA0372 1070-6 1070-5 + - 8 7 1 3073 22 2071 100n +5 3070 15k 3075 10k Uref 3072 6.8k 3071 10k 2070 2.7n 3074 15k 2072 180p 1052-4 1052-1 + -

27、 8 7 1 ! ! 2015 22 50V 3014 4.7 +5 3015 1k 3006 10k + - 5 6 3 +5 ! -10+5 2 4 3610 12k 3614 12k 2610 100n 3615 1 +10 TRAY FROM PIN 12 OF IC7700 3611 8.2k 3612 12k 3613 12k 3616 1! ! 3617 22 2612 100n 2611 100n 1071-3 1071-4 + - 2 3 1 8 3322 15k 3320 15k 3321 15k 2302 4.7 50V 2312 1.8n 3314 1k 3312 22

28、k GNDAGNDA GNDA 3323 15k + - 6 5 7 4 3300 22k 3301 15k 2303 270p 2300 330p 3304 12k 3303 18k 3302 3.3k VREFA 2301 22 16V 2121 100n 2120 100n 2119 100 10V 61NC3 62NC4 52VREFR 51VREFL 45NC2 57VDDR 46VDDL +5 ! 3111 22 QRA R/A 23 QDA DA 24 QCL CL 25 NC1 44 FROM PIN 14-15-16 OF IC 7700 2123 100n 2122 330

29、 16V VREFA ! -10 3306 22 ! +10 3305 22 2306 100n 2305 4.7 50V 7360 BC817-25 7361 BC817-25 3360 1k GNDA GNDA +5 7362 BC858 3361 1k 3664 10k 3665 560 1300-6 1300-7 GNDA 3662 10k 3663 10k KILLI FROM PIN 4 OF IC7700 -10 6660 BZX79/5V6 GNDA 3328 15k 1300-5 GNDA GNDA 2313 1.8n 3313 22k 3315 1k2311 4.7 50V

30、 SL-OUT+ SL-OUT- LEFT TRAY GND RIGHT FOC+ FOC- RAD+ RAD- 5V LASER CPU ROM RAM I/O PORT CI PORT D I/O PORT B I/O PORT A 33 4 34 5 36 7 11 0 10 1 9 2 8 3 7 4 6 5 5 6 4 7 2 37TCAP 35TCMP 40139381213141516 17 18 19 20 21 22 23 24 3722 1k 3707 10k 3706 10k +5 +5 +5 3724 1k 3723 1k 3708 10k 2704 2.2n +5c

31、3713 10k +5c 3714 10k +5 3716 10k +5 3717 10k +5 3718 10k 3711 3.3k 3715 3.3k NRST STANDBY SIDA SICL SILD KILLI TO R3662-3663 TO PIN1 OF IC7000 FROM PIN 25-26-27 OF IC7000 0V STANDBY 5V PLAY POSITION +5 3719 10k QRA TO PIN 23-24-25 OF IC7102 QDAQCL +5 3720 10k +5 3721 10k PWMA TO PIN 28 OF IC7102 ST

32、DA TO R3106 TRAY TO R3611 1700 4MHz 3700 220k ! 3553 1k 3552 22k 3551 1k 2550 2.2n RESET 6550 3V9 3550 560 +5+5 +5 3701 3.3 3710 10k 2702 33 16V 2703 22n 2103 330 16V 2704 100n A 3101 22k 2105 330n 2125 4.7n 3102 22k FROM IC7000 QTD 2102 2.2n 2101 47p 3100 2.2k 3054 100 7044 BC848B 3052 1.8k 3050 43

33、0 3047 430 3053 3.9k 7043 BC848B 2044 180p 2043 330p 3051 1.8k 2042 22 16V 3046 1k 3048 100 3049 430 3045 100 7042 BC858B 3044 1k 3042 330k 3043 30k 2041 180p 3041 39k 2052 22 16V 2040 22n 3040 100 +5 7040 BF840 7041 BC848B +5c 1052-7 D2 1052-9 2045 47p 3055 120k 2049 180p 2046 47p 3056 120k 2050 18

34、0p 2047 100p 3057 56k 2051 330p 2048 18p 3058 1k D3 1052-10 D4 1052-12 D5 1052-11 D1 1052-8 GND 1052-5 CONN 1052 TO CDM VIA FLEX FOIL SD2 SD3 SD4 D5 D1 TO DISC2 IC7000 +5 ! 2106 100n 2107 100 10V 3103 3.3 STAD FROM PIN 19 OF IC7700 2109 1 50V 3106 1k 2108 22n 2110 33p 2111 100n 3109 2.2k 6103 1N4148

35、 3112 2.2M -10 -10 1500-3 3502 1E ! +10 +10 1500-1 3501 1E ! 1500-2 GND 2504 100n 2500 2200 16V 2502 1000 16V 2503 100n 2501 100n +5 CONN 1500 TO POWER SUPPLY 7500 TY40408! 2019 22n 9055 7660 TCA0372B 1070-3 1070-4 TTM+ TTM- A TO TORNTABLE MOTOR GND 1071-1 GND 1070-1 TRAY SWITCH 1071-2 SLEDGE SWITCH

36、 1070-2 DATA 1300-1 STROBE 1300-2 ACK 1300-3 RESET 1300-4 RESET TO PIN 1 OF IC7700 7080A TCA0372 7060A TCA0372 7060B TCA0372 7300B NJM4560 7300A NJM4560 7301A NJM4560 7301B NJM4560 7102 SAA7341 7101 FC61C65L 7000 TDA1301T 7700 MC68HC05C8 32313029 3210 28 0 27 1 26 2 25 34 5 6 7 VSS STAD 7 6 5 01234

37、XTAL2 XTAL1 VDD RESET CLOCK & TIMIING IRQ +5c 17CLO 23 24 22 FO SL RA 2 LDON 16 OTD 3016 1k OTD TO PIN 80 OF IC7102 28 VCC CS2 NC 261 80 60OUTR 35 VSSA 41 VDDA 84 65 7550 BC858 12 67 90 LOW PULSES DURING SEARCH, NEXT, PREVIOUS 75 GND OE CS1 22 14 20 76 77 91ANALOGUE SIGNAL 92 ANALOGUE SIGNAL 94 ANAL

38、OGUE SIGNAL 93ANALOGUE SIGNAL 83 2.5V REST 0V OPENING +5V CLOSING 82 0V REST +5V OPENING -5V CLOSING 0V STANDBY 5V PLAY 22 20 21 18 12 1052-6 44.4s play mode stand by +5V 0V 10s/DIV service mode SERVO xx 0.5s/DIV 5V 0V 5V 0V service mode FOCUS FM not moving FM is moving service mode MOTOR 0.5s/DIV 5

39、V 0V 5V 0V service mode RADIAL no tracking control tracking control service mode SLEDGE 0.5s/DIV 5V 0V sledge not moving 5V 0V sledge out 5V 0V sledge in eyepattern 2.5V 0.5s/DIV 10ms/DIV play mode asynchronunous uP dependent QRA 0.2ms/DIV 10 X 8 bits continoue data QCL QDA 18 20 22 65 75 76 77 84 S

40、ERVICE POSITION SLEDGE 0V REST POSITION +5V WHEN SLEDGE IS MOVING 85 +5V REST POSITION OF TRAY 0V WHEN OPENING OR CLOSING 67 SERVICE POSITION SLEDGE, FOCUS, MOTOR: 0V SERVICE POSITION RADIAL: 5V 23 SERVICE POSITION SLEDGE SL-OUT -2.6V SL-IN+2.6V 21 ACTIVITY DURING PLAY 19 ACTIVITY DURING PLAY CD CIR

41、CUIT DIAGRAM 424038 IREF 2304 33 16V ! 3549 3546 1k 220E 3550 220E 3547 1k 3592 220E 0 +12V 9 8 3551 220E 6545 C5V6 5.6V off on 7545 BC338/40 5.1V 2544 220 M 10V 7544 BC338/40 on off M 1110 2 51 1 7547 BC328/40 7546 BC328/40 +- 0.7V 3534 (MOT) M 7549 BC548B 7548 BC548B 0V 0V 6544 C5V6 M +14V 3524 4.

42、7E 2539 100 3529 47k ! GEAGEA 2527 22n GEA 3528 39k 28 2526 47 GEA 3516 18k 3517 18k 3514 6.8k 2534 100p 2528 680p A 6.3V29 5 8 6.3V 6 + - 4 7 6.3V 2522 470p 3520 18k3518 1.8k 2524 100 2520 10 GEA 27 0V off 3522 5.6E 5520 GEA 3526 2.2k 2 3 + - 1 6.3V 2525 100 3523 5.6E5521 3527 2.2k 2538 47 680p 252

43、3 470p GEA 6.3V 3521 18k3519 1.8k 2521 10 GEA 6.3V 3554 22k 3588 4.7k +14V 32 31 AA 3535 10k 33 3553 22k 6548 C4V7 6549 C5V1 4.1V 7553 BC556B 2535 100p GEA 30 2518 1 3515 6.8k 26 3555 22k 25 2519 1 A 2553 10 3540 1M 3541 1M A 2537 100 A 3585 470E 3584 1k 23 A 3589 33k A 6546 1N4148 6547 M 3532 8.2k

44、2530 22n 3538 390E 3539 390E 3537 1k 3586 390E AAA 7530 BC548C 7532 BC338-40 3533 8.2k 2531 22n 3587 390E AA 7531 BC548C Dbb Dbb 3534L3534R 2533 1.2n AA 3531 4.7k 3536 1k 3530 4.7k 2.5V 3544 2556 10 6551 1N4148 6550 LED green 3591 3.3k 7533 BC338-40 Vol. Control 1N4148 2.5V A 3542 390E 3543 390E 753

45、5 BC338-40 7534 BC338-40 A A 24 4 34 3 35 2 36 1 37 A L R 1.6V MUTE2 1532 TO POWER PCB 1+12V 1 2 2 3 3 4 4 5 5 6 6 M 200 3.5V LED 3534 1k 5V 3545 1k 0V 3552 220E 0.7V on 1530 ON/OFF P +5V VOL DOWN VOL UP 1 BUZZER 12 2 BASS B 13 3 mute 2 14 4 mute 1 15 5 R hp 16 6 L hp 17 7+14V 18 1531 L hp 9 19 Remo

46、te Vol / motor control 3556 3.3k L ge2021 22 R ge AGEA 8 10 Headphone Amp VOL./HEADPHONE A 1907 A 1909 N/SPEED 1910 B 1924 REPEAT 1914 P/REVIEW 1915 OP/CLOSE 1918 CD/SYN 1911 A 1925 H/SPEED 1905 B 1902 SCAN 1913 EDIT 1917 REV 1919 REC /PAUSE 1900 A 1903 DOLBY 1901 B 1926 SHUFFLE 1912 CLEAR 1916 NEXT

47、 1920 B 1908 A 1923 AUTO/R 19041906 PLAY/P 1922 STOP 1921 B 6906 1N4148 84 12 6901 1N4148 83 13 6902 1N4148 82 14 6900 1N4148 81 7 6905 1N4148 80 6 6904 1N4148 79 5 6903 1N4148 78 4 1 1927 67 key 0 2 68 key 1 3 69 key 2 4 70 key 3 5 71 sr CLK 6 72 DATA 2 1 73 DATA 1 3 74 str 1 4 75 str 3 5 76 D 6 77

48、 +5V D CD/CASSETTE KEY BOARD 1923 led 88 3903 330E A 1925 led 87 3901 330E A 1924 led 86 3900 330E B 1926 led 85 3902 330E B +5V +5V 11111213147654 910123 16 15 8 16 15 90 89 3904 10k 2900 10 D 2904 1.2n 7901 HCT4094 7900 HCT4094 1 2902 9102 3 +5V D 2.7n * 1.2n * FOR FW40 FAMILY +5V 1928 D 8 CIRCUIT

49、 IN DOTTED LINE IS NOT FOR FW20 & FW30 52 53 key 0 key 1 key 2 key 3 CLK D ATA 2 D ATA 1 str 1 str 3 D +5V key 0 key 1 key 2 key 3 CLK DATA 2 1930 +5V str 3 str 1 DATA 1 D 1929 1110 12 98 6 43 5 21 13 3568 470k 3566 470k 3564 270k2560 22n 2566 8.2n 2564 4.7n 2562 10n 3562 1k 3560 2.7k 66 65 7560 BC549C 6.2V VC AA 6.2V VB 14 3572 470k AA AA 7 3574 12k 2574 0.68 3594 100k 2568 100p AA 12 13 34 5 89 6 1011 12 3569 470k 3567 470k 3565 270k2561 22n 2567 2565 4.7n 2563 10n 3563 1k 3561 2.7k 64 63 7561 BC549C 6.2V VC AA 6.2V VA 14 3573 470k AA AA 7 3575 12k 2573 0.68