Sony TC-WR720A Service Manual - Page 15

-23- 5-5. SCHEMATIC DIAGRAM -SYSTEM CONTROL SECTION- 1 2 I 3 I 4 5 1 6 7 8 9 I 10 I 11 I 12 I 13 I 14 I 15 16 17 j 18 19 [ 20 I 21 22 I 11 A B C D F G H J K L M N O WR720A FL90, FLUORESCENT INDICATOR TUBE PLAY HOC NORM HIGH AUTO PAUSE BLANK SKIP - E El • MEMORY 88-P -20 0 -4 0 +4 +8 L R MMINNIIMIIMINNIMIENINE=..., OVU 00 - coc s- 2" PLAY REC 'DOLBY NO 7 -7 N rn ,7 42 35 34 32 31 30 29 28 27 I5 [ FL BOARD] SW-A BOARD IS FOR COMMON DECK A AND B4ONE SIDE OMITTED. IC81 GP-2509- C SHUT OFF DET IC81 2 R85 IRO 585 L2. 5 584 933 082 SRI STOP c,z En [SW-A BOARDI 0 CNP8I MECHANISM MICOM F F TRIG STOP FWD REEL L H L L TRIG H L L H FWD H H L L POWER OP OUT AUDIO SYSTEM CONTROL 8029011/21 AUDIO/POWER SECTION C302 C901 00 0.14 6.30 I +4 5.2 IC901 FL DRIVE -27 -26.2 -26 11 89 Z9 IS 99 65 65 9s SS 95 OS 49 65 S5 55 , _14,4 -14.2 _20.3 c- z e o to. 38 , -20 -20 _25 -31.4 -25.8924% 01 IT 31.9 0 00 0 ESTENS ION •a . I 52 En PANEL BOARD (1/31 0904 2503901 SW ITC 11 00 sz 90 AZ IS 5.2 2 52 52 23 52 4.5 52 5.2 52 1 O 8901 ,cT 5.2 0 0.6 0902 2903 25C2603 252242 -RESET- >- E - -H CAMS.P... ••IAMSI 1' 06 IAMS I.. .4(AMS) -MI is Is 1 `, ,) . . . s ,'• y, i` =,,!'-] IC807 REC E0 SWITCH 1.3 01. RELAY DO el TO HS -PRO BOARD:AI EN069 I C5503 U47.59 BIAS (Al B BIAS IC806 REC E0 SWITCH ETAL -7.4 DECK B • :-5.i 705 -0.4 DECK B • 1- 2.9 DECK B :52 • 7 6 I6 12 82 XI 000,1 X0 X3 A iC806 -7 4 MC I 4052BCP DEC B 17 52 RB63 39k (WR720A) 2X0 2X2 2800N 2X3 2X1 'EH 4 13864 3.9k(WR72 9 lk (wR7200 6862{108 r',„11;3A18) R36,058(w,720) 7.6 DECK A • :0 7.6 0893 2081348 DECK A •'7.6 DECK B 23tV3499 -74 DECK B •:-2.9 0853,854 ID) < 2 5)-1 ' REC OUT L B REC OUT 181 TO AUDIO SYSTEM CONTROL 8049211/ AUDIO/PONER SECTION WR720A-7 r L - C 504 O TO 95 -PRO BOARDIEH CN6 91 RI R2 NPR PNP BAIL32 B1411.32 ' 7' --- 925+3901) (2381511/ AUDIO SYSTEM C▪ONTROL BOARDII/ AUDIO/POWER SECTION 23 • IC Block Diagrams IC806, 807 MC14052BCP cs.2 16 15 14 L.> 0 841 13 12 11 10 9 0 2 4 5 7 8 Note: • All capacitoi;s are in µF unless otherwise noted. pF: µµF 50WV or less are not indicated except for electrolytics and tantalums. • All resistors are in specified. and 14/ W or less unless otherwise • • :: internal component. adjustment for repair. • Voltage is dc with respect to ground under no-signal conditions. no mark: POWER ON • I', : FWD • Voltages are taken with a VOM (Inpu.t Im:RpeEdCance 10M Q ). Voltage variations4ma:yRbEeVnoted due to normal product(on tolerances. • Snign, al:pRatEhc. (DECK A) -24- -25- -26-