Sony HCD-XGR60 HCD-XGR6/XGR60, REC Bias Adjustment DECK B, Procedure, REC Level Adjustment DECK B

REC Bias Adjustment DECK B

Procedure:

1.Mode: Record

FUNCTION: VIDEO

MAIN board
MD(VIDEO) IN jack (J701)
L-CH, R-CH
1) 315 Hz 
 50 mV (– 23.8 dB)
2) 10 kHz 
AF OSC	blank tape
600 Ω	CS-123
attenuator
set

HCD-XGR6/XGR60

REC Level Adjustment DECK B

Procedure:

1.Mode: Record

FUNCTION: VIDEO

MAIN board

MD (VIDEO) IN jack (J701) L-CH, R-CH

315 Hz, 50 mV (– 23.8 dB)

AF OSC	blank tape
600 Ω	CS-123
attenuator
	set

2. Mode: Playback
recorded	level meter
portion
set	+
	–
	MAIN board
	CN301 pin 1 (L-CH)
	pin 3 (R-CH)

3.Confirm playback the signal recorded in step 1 become speci- fication values as follows.

If these values are out of specification values, adjust the RV321 (L-CH) and RV322 (R-CH) on the MAIN board to repeat steps 1and 2.

Adjustment level: The playback output of 10kHz level difference against 315 Hz reference should ± 0.5 dB.

Adjustment Location: MAIN board

Adjustment Location: MAIN board

– MAIN BOARD (Component Side) –

2. Mode: Playback

recorded	level meter
portion
set	+
	–
	MAIN board
	CN301 pin 1 (L-CH)
	pin 3 (R-CH)

3.Confirm playback the signal recorded in step 1 become speci- fication values as follows.

If these values are out of specification values, adjust the RV351 (L-CH) and RV301 (R-CH) on the MAIN board to repeat steps 1 and 2.

Specification values:

CN301 playback level: 47.2 to 53.0 mV (– 24.3 to – 23.3 dB)

RV392

TAPE SPEED

(HIGH)

RV301

REC LEVEL

R-CH

RV351

REC LEVEL

L-CH

RV321

REC BIAS

L-CH

CN431

1 18

CN371
1	15

IC501

IC301

1 3

CN301

RV322

REC BIAS

R-CH

RV391

TAPE SPEED

(NORMAL)

IN OUT

MD (VIDEO)

19