Sony HCD-CPX11, Руководство по обслуживанию

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24
HCD-CPX11
SECTION 5
ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB = 0.775 V
Note:
Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.
1. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
2. The adjustments should be performed in the order given in
this service manual.
3. The adjustments should be performed for both L-CH and R-
CH.
REC BIAS ADJUSTMENT
Procedure:
1. Press the
[FUNCTION]
key to select “MD” or “VIDEO”.
2. Set the tape into the deck.
3. After pressing
z
REC
key, press X (TAPE) key to start
recording.
4. Mode: Record
5. Mode: Playback
6. Confirm the playback signal recorded in step 3 becomes
adjustable level as follows.
If these levels are out of specified values, adjust the RV653
(L-CH) and RV603 (R-CH) on the TC board to repeat steps 4
and 5.
Specified values: Playback output of 315 Hz to playback
output of 10 kHz:
±
2.0 dB
Adjustment Location: TC board
attenuator
set
MAIN board
MD (VIDEO) IN jack (J101)
L-CH, R-CH
1) 315 Hz
2) 10 kHz
34.6 mV (– 27 dB)



600
Ω
blank tape
CN-123
AF OSC
+
–
set
recorded
portion
SP board
SPEAKER terminals (J860)
L-CH, R-CH
level meter
(R-CH)
(L-CH)
RV603
RV653





– TC BOARD (Component Side) –
REC Bias
Adjustment