Sony TA-F770ES Service Manual

Screwdriver
ASSEMBLY
Assemble in the numerical order given as shown
right figure.
SECTION 3
SWITCH DISASSEMBLY AND ASSEMBLY
in the
@ Set the moving contact
slider to the left side.
DISASSEMBLY
Remove by insenting screwdriver as shown in the left
figure.
(Don’t pull the wire. It causes malfunction.)
@ Turn switch knob so
that this position
becomes to the left
side fully.
t~
@ Note: Assemble $103 at the position
as shown in the figure.
SECTION 4
ELECTRICAL ADJUSTMENTS
Note: adjustment should be performed 5 minutes later, after the power
switch is on.
Offset Adjustment
Setting:
OPERATION switch: STEREO
Input signal: No signal input
Procedure:
speaker terminals VOM
~~ (0.3 Vde range)
set |
Adjust RT401 (L-CH) and RT-451 (R-CH) for 0 V reading on the VOM.
Adjustment Location: MAIN (A) BOARD
Q402 Q403
La WJ
Q401
\37
“2s
Q451
WwW &
Q452 453
RT401
Bias Current Adjustment
Setting:
OPERATION switch: STEREO
Input signal: No signal input
Procedure:
Adjust RT402 (L-CH) and RT-452 (R-CH) so that VOM reading of
TP-1 (L-CH), TP-2 (R-CH) become 35 mv. ;
Adjustment Location: MAIN (B) BOARD
VOM VOM
(0.3 Vdc range) (0.3 Vdc range)

Sony TA-F770ES Specifications

General

Brand	Sony
Model	TA-F770ES
Category	Amplifier
Language	English