18
CMT-A50/A70
– MAIN BOARD (Component Side) –
RV201
RV101
SECTION 5
ELECTRICAL ADJUSTMENTS
•
Precaution
1. The adjustment should be performed with the rated power
supply voltage.
2. The adjustments should be performed for both L-ch and R-ch.
0 dB = 0.775 V
DECK SECTION
REC BIAS ADJUSTMENT
Procedure:
1. Record mode
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjustment the RV101
(L-ch) and RV201 (R-ch) to repeat steps 1 and 4.
Adjustment level: Playback output of 315 Hz to playback output
of 10 kHz: 0
±
1.0 dB (0
±
4.5mV).
+
–
set
recorded
portion
SUB board
CN312 (pin
4
: L-CH)
(pin
3
: R-CH)
level meter
attenuator
set
MAIN board
LINE IN jack (J301)
1) 315 Hz
2) 10 kHz
50 mV (–23.8 dB)
600
Ω
blank tape
CN-123
AF OSC
Adjustment Location:
1
CN312
– SUB BOARD (Conductor Side) –
2
15
16
