19
HCD-CPX1
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 OUT board
SPEAKER terminals (J701)
L-CH, R-CH
level meter
0 dB=0.775 V
DECK SECTION
REC LEVEL 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 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
set
MAIN board
MD (VIDEO) IN (J101)
315 Hz, 34.6 mV (–27 dB)
blank tape
CS-123
600
Ω
attenuator
AF OSC
+
–
set
recorded
portion
SP OUT board
SPEAKER terminals (J701)
L-CH, R-CH
level meter
SECTION 5
ELECTRICAL ADJUSTMENTS
(R-CH)
(L-CH)
RV603
(R-CH)
RV602
(L-CH)
RV652
RV653
– TC BOARD (Component Side) –
REC Level Adjustment
REC Bias
Adjustment
