Sony HCD-V808 Service Manual page 21

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3 7 63 1515 0
Record bias Current Adjustment
Procedure:
1. Mode: Record
pin 6 (L-CH) of IC1501 on the MAIN board.
pin #¶ (R-CH) of IC1501 on the MAIN board.
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
pin 2 (GND) of CN207 on the MAIN board.
2. Mode: Playback
recorded
portion
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV341 (L-
CH) and RV441 (R-CH) on the AUDIO board to repeat steps 1
and 2.
Adjustable limits: Playback output of 315 Hz to playback out-
TE
L 13942296513
put of 10 kHz: ±0.5 dB
Adjustment Location: AUDIO board
Record Level Adjustment DECK B
Procedure:
1. Mode: Record
pin 6 (L-CH) of IC1501 on the MAIN board.
pin #¶ (R-CH) of IC1501 on the MAIN board.
315 Hz, 50 mV (–23.8 dB)
AF OSC
attenuator
pin 2 (GND) of CN207 on the MAIN board.
2. Mode: Playback
recorded
portion
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV1501 (L-
www
CH) and RV1551 (R-CH) on the MAIN board to repeat steps 1
and 2.
Adjustable limits:
.
CN207 PB level: 47.3 to 53.1 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
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DECK B


50 mV (–23.8 dB)

blank tape
600 Ω CS-123
set
level meter
+
set
–
MAIN board
CN207 (pin 3 : L-CH)
(pin 1 : R-CH)
600 Ω
set
level meter
+
set
–
MAIN board
CN207 (pin 3 : L-CH)
(pin 1 : R-CH)
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y
i
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8
Adjustment and Connection Location:
[AUDIO BOARD] (Conductor Side)
RV301 ® L
RV441 RV341
RV401 ® R
PB LEVEL
– DECK B –
[MAIN BOARD] (Component Side)
Q Q
3 6 7 1 3
blank tape
CS-123
u163
.
– 21 –
2 9 9 4 2 8
RECORD
BAIS
L
R
(NORMAL)
RV651
LEVEL
RV1501
21
1 3
22
CN207
IC301
IC201
RV1551
RECORD LEVEL
1 5 0 5 8 2 9 9 4
m
co
9 9
TAPE SPEED
(HIGH)
RV652
®
®
RV311
PB L ®
RV411
R ®
– DECK A –
1
IC1501
42 CN205
2 8 9 9