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Electrical Adjustments; Offset Adjustment; Bias Current Adjustment - Sony TA-N77ES Service Manual

Stereo power amplifier
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Table of Contents
SECTION 2
E L ECTR I CA L ADJUSTM ENTS
Note: Adjustment should be performed 5 minutes latel. aftel
the power switch is on.
Offset Adjustment
Setting:
OPERATION switch:
Input signal:
Procedure:
STEREO
No signal inpur
VOM
Adjustment Location: main (A) board
.
(0.25 dc renge)
speaker dttput
F-r
terminals
lf-;f
I
Hl
-l-t
Adjust RT40l
(L{H)
and
0 V reading on the VOM.
RT-451 (R{H)
for
nT40'
(L-CH)
BT45I
(R-CH)
Bias Gurrent Adjustment
Setting:
OPERATION switch:
Input signal:
Procedure:
STEREO
No signal input
Adjust RT302 (L-CH) and RT352 (R-CH) so that
VOM readings of Tp-A (L-CH), Tp-B (R_CH)
b e c o m e l 5 m V .
Adjustment Location: main (A) board and protector board
voM
_ R-CH _
(0.25 V dc renge)
RT352
(R-CHl
main (A) board
Crl
rroo
_ - o
o :
- 9 -

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