Deck Section - Sony SS-CPX1 Service Manual

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:
[FUNCTION]
1. Press the key to select "MD" or "VIDEO".
2. Set the tape into the deck.
3. After pressing key, press
z REC
recording.
4. Mode: Record
MAIN board
MD (VIDEO) IN jack (J101)
L-CH, R-CH

1) 315 Hz

2) 10 kHz

AF OSC
600 Ω
attenuator
5. Mode: Playback
recorded
portion
set
SP OUT board
SPEAKER terminals (J701)
L-CH, R-CH
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
SECTION 5
ELECTRICAL ADJUSTMENTS
(TAPE) key to start
X
34.6 mV (– 27 dB)
blank tape
CN-123
set
level meter
+
–
REC LEVEL ADJUSTMENT
Procedure:
[FUNCTION]
1. Press the key to select "MD" or "VIDEO".
2. Set the tape into the deck.
3. After pressing key, press
z REC
recording.
4. Mode: Record
MAIN board
MD (VIDEO) IN (J101)
315 Hz, 34.6 mV (–27 dB)
AF OSC
600 Ω
attenuator
5. Mode: Playback
recorded
portion
set
SP OUT board
SPEAKER terminals (J701)
L-CH, R-CH
6. Confirm the play back signal recorded in step 3 becomes
adjustable level as follows.
If these levels are out of specified values, adjust the RV652 (L-
CH) and RV602 (R-CH) on the TC board to repeat steps 4 and
5.
Specified values: Playback level 30.8 to 38.8 mV (–28 to –26 dB)
Adjustment Location: TC board
– TC BOARD (Component Side) –
REC Level Adjustment
(L-CH)
RV652
(R-CH)
RV602
(R-CH)
REC Bias
Adjustment
(L-CH)
HCD-CPX1
(TAPE) key to start
X
blank tape
CS-123
set
level meter
+
–
RV603
RV653
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