Sony tc w 345 service manual

Page 1

SONX

SERVICE MANUAL

SUPPLEMENT-1

File this Supplemem with the Service Manual.

Subject : Schematic Diagram change
Block Diagram

New type identification :

[AUDIO BOARD] - Component side -

WM

163077145

Sony Corporation

Consumer A&V Products Company
9-959-377-81 Home A&V Products Dlv.

US Model
Canadian Model
AEP Model

E Model
Australian Model

English

94F0973-1

Printed in Japan

© 1994 6

Published by Home MV Producls Div.
Quality Engineering Dept.

Page 2

1": indicates changed portion

CHANGE PARTS LIST
Page Ref. No. Former New
18 C153 l-l 36-43741 FILM 220PF 5% 630V
C253 1-136437-1 1 FILM 220?}? 5% 630V
19 C130] 1-141-225-00 CAP. TUNING, TRIMAR
21 RV104 |-24]»767-21 RES, ADJ. CERMET 100K
RV204 - l»24l-767-2] RES. ADJ, CERMET 100K

ELECTRICAL ADJUSTMENTS (Service manual page 5)

RECORD BIAS ADJUSTMENT

Setting :

TAPE SELECT : TYPE-I (DECK-B)
Procedure :

1 Mode : record

AF OSC blank tape

0 1 ((9 08-1 23
attenuator

#ETOI-F-fl-C

LINE [N

1) 31 SH:
2) 1 OKHZ } 0.025v (-SOdB)

2. Mode : playback

recorded
portion VTVM
47kfllfi
blink .
l-.°
LINE OUT

Playback the tape recorded in step 1. If the specification is not
satisfied, adjust RV104 (L-CH), RV204 (R-CH) and repeat steps
1 and 2.

Measurement limit 1

The LINE OUT level of IOkHz signal relative to that of
315Hz : -0t5dB to OTSdB.

Adjustment Location : Audio Board

- Component side -

RV101 HV201
RV1°2 RVZOZ

leO4
5} 37

HVSOI RV503

\

Ininunninu

RV104
@ 5 RV504 5 a 6
RV502 E RV103 FlVZOS V204
CNP505