Toshiba MW27F51 Service Manual - Page 75

A B C D E F G Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM 8 (VCR PCB) R4545 FSC 1K L4506 P.CON+5V_A 47uH 0305 P.CON+5V_A Y/C_DATA Y/C_CLK 12K Y/C_CS R4530 22K1/4W H.SW R4528 C_ROTARY VCR_A_MUTE H.AMP_SW1 COMP ENV_DET FROM/TO REGULATOR 7 P.CON+8V P.CON+5V_A W864 W854 R4523 R4525 22K 12K R4506 3.3K L4505 47uH 0305 C4545 1.8K BUFFER 12 Q4507 2SC2412K R45374.0 5.0 1.8K 3.4 1/4W S808X S808Y W880 NC C4556 0.01 B 1.5K C4549 50V 1 KA R4541 8.2K C4546 50V1 KA 6.3V 47 KA R4524 47K C4538 0.1 B 0.022 B C4547 C4543 C4535 0.1 B FROM/TO Hi-Fi/DEMODULATOR NORMAL_A Y/C_AUDIO FSC HF2 HF_COM HF1 6 FROM/TO CYL CP4501 TOC-C09X-A1 9 HF1 (R) 8 HF COM 7 HF2 (L) 6 SP-CH1 (R) 5 SP COM 4 SP-CH2 (L) 3 EP/LP-CH1 (R) 2 EP/LP COM 5 1 EP/LP-CH2 (L) P.CON+5V_A L4501_3 100uH 0607 4 C4505 0.33 B C4508 6.3V 47 KA 3 FROM/TO HEAD AUDIO CONTROL NORMAL_A R4504 R4505 CD4502 2F061502 CP4502 IMSA-9604S-06C 6 AUDIO REC 5 AUDIO PB 4 CTL+ 3 CTL- 2 AE HEAD(+) 1 AE HEAD(-) 2 12K P.CON+5V_A V.REC_ST_H W846 0 CTL+ CTL- 15 AUDIO PB SW Q4501 KTC3875S_Y_RTK R4501 560 0 0.7 R4502 10K 0 SW 8.2K Q4503 KRA103SRTK 5.2 COIL,BIAS OSC L4502 5.3 1626009 6 1 5 2 4 3 C4506 100V 0.022 MMTS TO FULL ERASE HEAD CP4503 B2013H02-2P 2 FE HEAD(GND) GND 1 FE HEAD(HOT) HOT AUDIO PB SW Q4502 KTC3875S_Y_RTK 0 0.7 R4503 10K 0 C4511 6.3V 220 YK 0.015 B 3.3K R4510 2.2 R4507 1M C4534_1 0.0047 B R4522 220K 1/4W C4501 0.0022 B R4531 C4539 180 25V 10 KA C4540 50V 3.3 KA C4558 R4534 C4555 6.3V 47 KA 50V 1 KA 100CT3R502 3.579545MHz R4539 R4544 0.1 B C4561 C4521 0.068 B C4514 0.047 B C4522 0.047 B C4523 C4517 16V 22 KA 0.1 B C4524 C4518 6.3V 220 KA 0.1 B R4512 W877 101/4W R4509 Y/C/AUDIO/HEAD AMP IC IC4501 LA71205M-MPB 2.2 0 4.0 1.8 0.7 0.7 0.7 5.0 R4513 1.7 1.2K 1.8 +-1% 0 2.0 2.0 2.0 0 2.2 4.9 2.3 0 2.0 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 4.7K 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 C4550 680K 0.01 B X4501 C4559 R4559 2.2K 1/4W 0.1 B 0.5 2.8 0 0 0 4.8 4.8 4.8 5.0 1.9 2.6 4.0 3.3 3.3 2.3 NC 5.0 5.0 0 2.2 0.8 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 COMPOUT ENV KILL DET DET HA GND AUDIO C-ROT C-GND MUTE RF-SW HA SW IN CHROMA DET ACC DET P R H P L HA VCC SERAIL DECODER C-VCC VX01 320FH VCO SLD PR REC PB REC APC APC AFC PR C-LPF RP BEFORE AFTER BGA BGA BGA RP Main CONV 3.58M BPF2 B-UP AMP ALWAYS VDD 5V B 4Fsc PLL CLOCK 0 VSS 1.7 TIMMING OUT OUT 0 DRIVER AUTO-BIAS VSS 3.0 CCD CLAMP IN 2.8 CNC VCA 3.C14565 PB VCA AMP 3.1 CLAMP B.D 2.6 P VCP BUFFER Q4509 2SA1037AK 1.7 0 2.3 R4557 82K1/4W 25V 10 KA R4560 100K C4566 C4570 50V4.7 KA HA PRE GND P R P A-GND 1 2 3 A-VCC + H L ALC R P ALC DET PB,EE 4.21M BPF Sub CONV LPF VREF REC PB,EE AMP ACC P AMP R ACC DET 3.58M BPF1 PB-C YNR/COMB VIDEO AGC 1 2 3 REG 4V DETAIL ENH P P R CLAMP NL EMPHA NL EMPHA R P Y-LPF R LINE AMP FM MOD R-EQ TEST NORMAL DOUBBLE LIM REC FM-EQ FM P R AGC MUTE PB FM EQ S-EQ VHS SOPB R N.L. DEEM PB-C NC1 Y/C MIX FM SUB DEM LPF MAIN DE-EM PR PR 1/2 BAL FBC TC1 R P R P AGC TC2 QV/QH 6DB SYNC SEP V.SYNC SEP Y-VCC 2.0 4.0 2.0 2.3 2.3 1.6 2.9 3.6 NC 0 4.9 2.8 50V1 KA C4572 C4569 50V 1 KA 0.1 B C4567 50V 0.22 KA C4564 10V 33 KA R4550 11 Vref EQ AMP SP,LP REC:LP