Sony HCD-XG60 Service Manual page 17

DECK B
REC Bias Adjustment
Procedure:
1. Mode: Record
FUNCTION: VIDEO
MAIN board
VIDEO AUDIO IN jack (J701)
L-CH, R-CH

1) 315 Hz

50 mV (– 23.8 dB)
2) 10 kHz

AF OSC
600 Ω
attenuator
2. Mode: Playback
recorded
portion
set
MAIN board
MD OUT jack (J701)
L-CH, 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 RV341
(L-CH) and RV441 (R-CH) on the AUDIO board to repeat
steps 1and 2.
Specification values: Playback output of 315 Hz to playback
output of 10 kHz: ± 0.5 dB
Adjustment Location: AUDIO board
DECK B
REC Level Adjustment
Procedure:
1. Mode: Record
FUNCTION: VIDEO
MAIN board
VIDEO AUDIO IN jack (J701)
L-CH, R-CH
315 Hz, 50 mV (– 23.8 dB)
AF OSC
600 Ω
attenuator
2. Mode: Playback
recorded
portion
set
MAIN board
MD OUT jack (J701)
L-CH, 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 RV301
(L-CH) and RV351 (R-CH) on the MAIN board to repeat steps
1 and 2.
Specification values:
J101 PB level: 47.2 to 53.0 mV (– 24.3 to – 23.3 dB)
Adjustment Location: MAIN board
– MAIN BOARD (Conductor Side) –
blank tape
CN-123
set
level meter
+
–
– AUDIO BOARD (Component Side) –
– LEAF SW BOARD (Component Side) –
(NORMAL) (HIGH)
blank tape
CS-123
set
level meter
+
–
VIDEO
MD OUT
AUDIO IN
L/R
L/R
J701

RV301

L-CH


IC301

REC LEVEL


RV351 

R-CH
RV441
IC602
CN601
RV301
RV341
R L
PB LEVEL
(L)
REC BIAS
– DECK B –
TAPE SPEED
RV1002
RV1001
HCD-XG60/XG500
RV311
PB LEVEL (L)
– DECK A –
CN1001
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