Sony HCD-M333 Service Manual page 34

HCD-M333
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3 7 63 1515 0
Record Bias Adjustment
Procedure :
1. Press the FUNCTION button to select ANALOG IN.
2. Insert a tape into deck, press the z TAPE button, and then
press the X TAPE button to start recording.
3. Mode : Record
ANALOG IN (SJ302)
1) 315 Hz
2) 10 kHz
AF OSC
600 Ω
attenuator
4. Mode : Playback
MAIN board
CN105
Pin
Pin
recorded
position
set
Pin (GND)
2
TE
L 13942296513
5. Confirm playback the signal recorded in step become adjustment
level as follows
If these levels do not satisfy adjustment level, adjust the RV653
(L-CH) and RV603 (R-CH) on the TC board to repeat steps 3
and 4.
Adjustment level : The playback output of 10kHz level difference
against 315Hz reference should be 0 ± 2.0dB.
Adjustment Location :
[MAIN BOARD]
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.
34
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34.6 mV (–27 dB)
blank tape
CS-123
set
(L-CH) or
4
level meter
(R-CH)
6
1 19
2 18
CN105
x ao
y
i
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8
Record Level Adjustment
Procedure :
1. Press the FUNCTION button to select ANALOG IN.
2. Insert a tape into deck, press the z TAPE button, and then
press the X TAPE button to start recording.
3. Mode : Record
AF OSC
attenuator
4. Mode : Playback
recorded
position
set
Q Q
3 6 7 1 3
5. Confirm playback the signal recorded in step become adjustment
level as follows
If these levels do not satisfy adjustment level, adjust the RV652
(L-CH) and RV602 (R-CH) on the TC board to repeat steps 3
and 4.
Adjustment level :
playback Level : 30.8 to 38.8mV (–28 to –26dB).
Adjustment Location :
[TC BOARD]
Record Bias
RV653
(L-CH)
u163
.
2 9 9 4 2 8
ANALOG IN (SJ302)
34.6 mV (–27 dB)
315 Hz
blank tape
600 Ω
CS-123
set
MAIN board
CN105
Pin (L-CH) or
4
level meter
Pin (R-CH)
6
Pin (GND)
2
1 5 0 5 8 2 9 9 4
RV652
(L-CH)
Record Level
RV602
(R-CH)
RV603
(R-CH)
m
co
9 9
2 8 9 9