Playback Level Adjustment; Record Bias Adjustment; Adjustment Location: Audio Board - Sony TC-R303 Service Manual

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Level
Playback adjustment
3 7 63 1515 0
Procedure:
1. Mode: playback
test tape
P-4- L 3 0 0
(315Hz. 0 dB)
Adjust RV103 (L-CH) and RV203 (R-CH) so that
the specification is met.
Specification:
0.41 to 0.46 V
LINE OUT level:
(-5.5 to -4.5 dB)
Level difference between channels:
less than 0.5 dB
Check that the LINE OUT level does not change
in playback mode while changing the mode from
playback to stop several times.

Adjustment Location: audio board

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RV103
IL-CH)
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Bias Adjustment
Record
2 9
8
Setting:
REC LEVEL control: standard record
Procedure:
1. Mode: record
AF OSC
2. Mode: playback
recorded
Confirm that the 1OkHz playback output is O±O.5
dB relative to the 315 Hz output. If necessary,
Q Q
adjust CT301-1 (L-CH), CT301-2 (R-CH) and
3 6 7 1 3 1 5
repeat the steps given above.
Adjustment Location: audio board
CT301-1 CT301-2
co
(L-CH) (R-CH)
.
-9-
9 4 2 8
(See page 7.)
2 1 10kHz 1
0 5 8 2 9 9 4 2 8
m
9 9
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