Sony TC-WR720A Service Manual - Page 31

TC-WR720/WR720A TC-WR720/WR720A TC-WR720/WR720A J301 -I LIN!E IN HRPE101(A) REC/PB HEAD L-CH DECK:A HRPE101(B) REC/PB HEAD DECK:B HRPE101(A) ERASE HEAD DECK:B HRPEI01(B) ERASE HEAD 32 . DECK:B RV501-1(WR720) RV902-I(WR720A) BALANCE 01/502-1(WR720) 00901-1(WR720A) REG LEVEL IC3I(A) PB ELI AMP REG 0 7t. RO1 1(A) PB LEVEL I PB RY3I(A) RELAY DRIVE ▪ RELAY A >---, IC506 SWITCH 15 2 10 PB SEL • REG IC31(A) PB EQ AMP RVI I (B) 3 I PB LEVEL I 5 PB RY3I(B) RELAY DRIVE 0806 ▪ RELAY B AMS SEL 751(A) BIAS OSC BIAS OSC 051(A).52(A) IBIAS REG I 053(A) 7039I AU7.5V RV0391 IC0691 7 DOLBY HX PRO REC LEVEL L-CH(A) 2 RCA EFT 3 8 PRE DRIVE 10 R CH T51(B) BIAS OSC BIAS OSC 051(B) 52(8) T391 BIAS OSC BIAS REG 053(3) AU7.5V IC691 DOLBY FM PRO RV391 REC LEVEL L-CH(B) VCA DET 3 PRE DRIVE R-CH IC501(1/2) DOLBY NR IC504 METER AMP 5 >7 EQ SWITCH 0101 -F1 3 MODE CONTROL 4 26 5 MUTING 0171 R CH 'MUTING DRIVE 0571.572 LPF101 REC/PB SWITCH 0502 REC/PB PB ED SWITC R CH -• I C503 0501 -.03 6020- DOLBY B/C B/C 0504 A AMS AMP 7 3\1 DOLBY SWITCH 0505 AMS/BS SELECT 0601 •- - R0503-I PHONES LEVEL WR720 WR720A > R-CH 0 IC601 HEADPHONE AMP IC501(1/2) DOLBY NR 8 HLS LLS IC807 REC EC SWITCH IC551 REC E0 a 2 3 14 6 6 MUTING 0121 60121 REC GAIN L-CH(A) J301-3 LINE OUT O J501 PHONES WR720 SWITCH 0905 S,W1I0TCH 7 587(A) DIRECTION V 587(8) DIRECTION a - 67 METER L 22 DIR(A) DIR(B) E) AMS IN REMOTE SENSOR 0902 BUFFER --.481111) SIRCS FL901 FLUORESCENT INDICATOR TUBE WR720A WR720A WR720 SWITCH 0906-908 IC802 MECHANISM CONTROL SENS(A) PSW(A) ANI 40.41 '2 2 c% - 42-44 22 2 MD-RC MD-SCLK MD-SIN MD SCUT RESET OUT IC901 FL DRIVE SYSTEM CONTROL C,M OR/OFF REO SCK O RESET REEL(A) 2 TRIG(A) 22 FWD(A) 20 X801i- 4MHz 7 0 OUT X IN co SENS(B) IC804( 1/2) WAVE SHAPE 12 2 3 M2(A) REEL MOTOR RV72(A) HIGHT SPEED IC804(IA) WAVE SHAPE 6 SHUT OFF DET IC81(8) DECK:A 81(8) M CAPSTAN MOTOR AU -7,5V R-CH AU 7.5V 4 3 2 9 A WR720A RV901 BIAS (DECK B) WR720 IC806 REC EC) SWITCH 5 2 4 AU7.5V 4 5 AU-7.5V RESISTOR MATRIX R CH MUTING SWITCH 0521 BIAS SWITCH 0851,852 IC509 NEC EC) 8 6 2 34 5 RESISTOR MATRIX A A 9 A 10 9 BIAS SWITCH 0853.854 4 12 O 0- 0 0 IC5 0 REC EQ SWITCH O 0901-S927 RV122 REC GAIN L-CH(B) MUTING 0552 R CH MUTING SWITCH 0551 (---< T0µ > ) (.--< 70µ > ) D902 A+0 REC ; 5 083(6) METAL 582(B) 7fr CrOB 083(A) 1 METAL S82(A) Cr02 IC803 SUB CONTROL • B/C '---K ON/OFF s--< LINE MUTE • AMS/BS • PB T0µ 7 `-•< PB SEL '-< AMS SEL • REC/PB "--< RELAY A '-< RELAY B •---. 7 DOLBY B/C DOLBY ON/OFF 4 LINE MUTE 5 AMS/B5 6 PB 70µ PB SELECT A2g AMS SELECT A/B 9 REC/PB 10 RELAY(A) RELAY(B) 12 REC MUTE(A) REC MUTE(B) 14 BIAS(A) BIAS(B) EQ HIGH DATA CLK X I X OUT KEY 3 KEY REC(A+B)LED 37 70µ(A(RD 36 METAL(A)RI 35 70µ(8)R2 34 METAL(B)R3 DATA CLK PSW(B) 0 ANO C.M ON/OFF REEL(B) I TRIG(B) FWD(B) 7 A ) - •(I SPEED SELECT 0803.804 5701-2 POWER ON OFF CI RESET RESET 0902,903 S POWER IN 3 POWER OUT 5 SWITCH 0904 C, STOP S84(8) PROOF(A) S85(B) PROOF(B) S86(8) METAL CAPSTAN CONTROL 0801 DECK:B MOTOR SPEED CONTROL 071(6) R071(8) NORMAL SPEED IC805( /2) MOTOR DRIVE 6 >8 7 M2(B) REEL MOTOR R072(8) HIGHT SPEED MI(B) M CAPSTAN MOTOR AU -7.5V SYS 5V POWER SWITCH 0708 AU 7.51, POWER SWITCH 0706 AU 7.5V -• 7.5V REG 0705 D707-711 RECT -7.5V REG 0707 I C70111/2) TO FLOOI X X -28V REC 28V 0703,704 T701 POWER TRANSFORMER S701-1 POWER EXCEPT E MODEL (r 11 AC IN ON E MODEL OFF 5702 !VOLTAGE SELECTOR > AC IN