Sony HCD-GR5 Service Manual page 13

Record Bias Adjustment (Deck B)
Procedure:
1. Press FUNCTION button to Select MD.
2. Mode: Record
MD IN
1) 315Hz
2) 10kHz
AF OSC
600
attenuator
3. Mode: Playback
recorded
position
set
MAIN board
CN403
4. Confirm playback the signal recorded in step 2 become
adjustment level as follows.
If these levels do not adjustment level, adjust the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 2 and 3.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be ± 0.5 dB.
Adjustment Location: AUDIO board
Adjustment Location:
[AUDIO BOARD] (Conductor Side)
RV341 (L CH), 441 (R CH)
Record Bias Adjustment
RV301
RV401 RV341
RV441
RV301 (L CH), 401(R CH)
Playback Level Adjustment
(Deck B)
}
50 mV (–23.8 dB)
blank tape
CS-123
set
level meter
Pin 3 (L-CH)
Pin 1 (R-CH)
RV651 (Normal speed)
RV651 RV652
RV652 (High speed)
Tape Speed Adjustment
RV311
RV411
RV311 (L CH), 411 (R CH)
Playback Level Adjustment
(Deck A)
Record Level Adjustment (Deck B)
Procedure:
1. Press FUNCTION button to Select MD.
2. Mode: Record
AF OSC
attenuator
3. Mode: Playback
recorded
portion
4. Confirm playback the signal recorded in step 2 become
adjustment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 2 and 3.
Adjustment level:
CN403 PB level: 47.3 to 53.1 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
RV351
Record Level Adjustment
(R CH)
— 13 —
MD IN
315Hz 50mV (–23.8 dB)
blank tape
600
CS-123
set
level meter
set
MAIN board
Pin 3 (L-CH)
CN403
Pin 1 (R-CH)
1 3
RV351
CN403
IC401
RV301
RV301
Record Level Adjustment
(L CH)