Sony TC-RX55 - Service Supplement - Adjustment Updates; Bias Consumption Current Adjustment Procedure; Schematic and Parts List Revisions

SONTY.
SERVICE MANUAL
SUPPLEMENT-1
Bias Consumption Current Adjustment
Note: Perform this adjustment before Record Bias Adjustment only
when replacing head, IC91, or step-up transformers (TS1,
T71).
Setting:
REC LEVEL control: standard record
(See service manual page 4.)
Procedure:
1. Set RV42 and RV62 to mechanical center.
2. Set blank tape (CS-412) and record on no-signal conditions.
3. Adjust T51 (L-CH), T71 (R-CH) so that the voltage between
pin (3) — () (L-CH), pin 3) — G) (RCH) of TP91 is mini-
mum.
4, Perform Record Bias Adjustment and Record Level Adjustment.
US Model
TC-RX55ES/RX410
Canadian Model
TC-RX55/RX410
AEP Model
UK Model
Adjustment Location: HX PRO board
Bias consumption current adjustment
T51 171
(L-CH) (R-CH)
Schematic diagram and electrical parts list have been changed because of resistors value change.
Former
[Prue [aon
1-249-430-11 | (RX410)...CARBON 12K 5%
1-247-838-00. | (RX410)... CARBON 2K 5%
1-249-419-11 | (RX410)...CARBON 1.5K 5%
1-247-883-00 | CARBON 150K 5% 1/4W
1-249-433-11 (RX410)... CARBON 22K
1-247-883-00 | CARBON 150K 5% 1/4W
1-249-433-11 | (RX410)... CARBON 22K
1-247-874-11 (RX410)... CARBON 62K
1-249-437-11 | CARBON 47K 5% 1/4W
1-249-440-11 | (RX410)... CARBON 82K
New
Part No.
1-249-433-11
1-249-429-11
1-249-428-11
1-247-883-00
1-247-887-11
1-247-862-11-
1-247-883-00
1-247-887-11
1-247-862-11
1-247-872-11
1-247-872-11
1-249-437-11
1-247-876-11
Description
(RX410) CARBON
(RX410) CARBON
(RX410) CARBON
(RX55, RX55ES) ... CARBON
(RX410) CARBON
(RX410) CARBON
(RX55, RX55ES) ... CARBON
(RX410) CARBON
(RX410) CARBON
(RX410) CARBON
(RX410) CARBON
(RX55, RX55ES) ... CARBON
(RX410) CARBON
E Model
TC-RX55