Read Sony HCD-GR3 / HCD-RX30 / MHC-GR3 / MHC-RX30 Service Manual online
— 12 —
Record Bias Adjustment (Deck B)
Procedure :
1. Mode : Record
1. Mode : Record
2. Mode : Playback
2. Mode: Playback
VIDEO IN
1) 315Hz
2) 10kHz
1) 315Hz
2) 10kHz
AF OSC
attenuator
blank tape
CS-123
CS-123
set
600
Ω
} 51.2 mV (–23.6 dB)
Confirm playback the signal recorded in step 1 become adjustment
level as follows.
If these levels do not adjustment level, adjustment the RV304 (L-
CH) and RV404 (R-CH) on the main board to repeat steps 1 and 2.
level as follows.
If these levels do not adjustment level, adjustment the RV304 (L-
CH) and RV404 (R-CH) on the main board to repeat steps 1 and 2.
Adjustment level : Playback output of 10kHz level diffrence
against 315Hz reference should be ±0.5 dB.
Adjustment Location : MAIN board
Record Level Adjustment (Deck B)
Procedure :
1. Mode: Record
1. Mode: Record
main board
CN307 Pin
CN307 Pin
1
(L-CH)
Pin
3
(R-CH)
set
recorded
position
position
level meter
attenuator
600
Ω
set
AF OSC
blank tape
CS-123
CS-123
VIDEO IN
315Hz 51.2 mV (–23.6 dB)
315Hz 51.2 mV (–23.6 dB)
level meter
recorded
portion
portion
set
main board
CN307 Pin
CN307 Pin
1
(L-CH)
Pin
3
(R-CH)
Confirm playback the signal recorded in step 1 become adjustment
level as follows.
If these levels do not adjustment level, adjustment the RV303 (L-
CH) and RV403 (R-CH) on the main board to repeat steps 1 and 2.
level as follows.
If these levels do not adjustment level, adjustment the RV303 (L-
CH) and RV403 (R-CH) on the main board to repeat steps 1 and 2.
Adjustment level :
CN307 playback level : 47.2 to 53.0 mV (–24.3 to –23.3 dB)
CN307 playback level : 47.2 to 53.0 mV (–24.3 to –23.3 dB)
CN307
CN308
RV303
IC303
RV403
RV401
RV304
RV
402
402
RV301
RV404
RV380
Adjustment Location
[MAIN BOARD] (Component Side)
RV
302
302
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