Sony c 357 service manual

Page 2

C-357 SECTION 3 DIAGRAMS 3-1. PRINTED WIRING BOARD Ñ 5 Ñ 3-2. SCHAMITIC DIAGRAM Ñ 6 Ñ Note on Printed Wiring Board: ¥X: parts extracted from the component side. ¥ ¨ : Through hole. ¥b: Pattern from the side which enables seeing. Caution: Pattern face side: Parts on the pattern face side seen from (Side B) the pattern face are indicated. Parts face side: Parts on the parts face side seen from (Side A) the parts face are indicated.Note on Schematic Diagram: ¥ All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. ¥ All resistors are in W and 1/4 W or less unless otherwise specified. ¥ % : indicates tolerance. ¥C: panel designation. ¥U: B+ Line. ¥ Power voltage is dc 1.5 V and fed with regulated dc power supply from battery terminal. ¥ Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. ¥ Voltages are taken with a VOM (Input impedance 10 MW). Voltage variations may be noted due to normal produc- tion tolerances. ¥ Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. ¥ Circled numbers refer to waveforms. ¥ Signal path. F: MIC Ref. No. Location D1 F-3 D2 I-3 D3 H-3 D4 B-3 D5 B-3 D6 G-3 D7 G-2 IC1 G-2 Q1 B-5 Q2 C-3 Q3 I-3 ¥ Semiconductor Location 1 D6 ANODE 5µsec/div 20V/div · Waveform MIC1 -TOTAL CURRENT 7 mA CAPSULE DRY BATTERY SIZE"AA" (IEC DESIGNATION R6) 1PCS,1.5V CL-220HR-C BATTERY CHECK INDICATOR() POWER/LOW-CUT D-D CONV. R24 100K R25 47K POWER/LOW-CUT HH TYPE 8 (DIRECTIVITY)UNI OMNI C16 0.0012 19.6999.99M999.99M 46.4 24.0 0 00 0dB -10dB AMP BOARD (SIDE B) AMP BOARD (SIDE A) 1-671-801- 121-671-801- 12 DRY BATTERY SIZE"AA" (IEC DESIGNATION R6) 1PCS,1.5V T1 RED RED WHT PULYEL YEL YEL BRN BRN BLU GRN BLU BLK WHT R3 D5D5 D4 R5 R9R25 R24C16 C13 R4 C EB R10 R8R7 R19 Q2 C6 C5 C4 R18 R16 SW1 SW3 SW3 R6 R22 R23 R11 R17 D3 R14 R15C9 C12 D1 C7 C14 IC1 D7 T2R20 R21 D6 C10 C11R13 L1 L2 D2 E C B 3 4 6 11 3 2 R12 Q3 C8 CN1 12 3 MIC1 CAPSULE C3 C2 C1 C15 R1 R2 POWER /LOW-CUT BATTERY CHECK INDICATORQ1 M V OFF SW2 –1 –2 S PAD (DIRECTIVITY) OMNI UNI 25 0dB -10dB 12 A B C D E F G H I J34567 16