Sony HCR-S7AV Service Manual page 122

TC-S3
DECK B
REC Bias Adjustment
Procedure:
1. Insert a tape into Deck B.
[REC PAUSE/START]
2. After press
[REC PAUSE/START]
press
3. Mode: Record
MD/VIDEO (AUDIO) IN (J601): ST-S3/S5/SV7

1) 315 Hz

50 mV (–23.8 dB)
2) 10 kHz

AF OSC
600 Ω
attenuator
4. Mode: Playback
recorded
portion
ST-
set
S3/S5/SV7
5. Confirm the playback signal recorded in step 3 becomes ad-
justable level as follows.
If these levels are not adjustable level, adjust the RV304 (L-
CH) and RV354 (R-CH) on the MAIN board to repeat steps 4
and 5.
Adjustable level: Playback output of 315 Hz to playback output
of 10 kHz: ±1.0 dB
Adjustment Location: MAIN board
REC Level Adjustment
Procedure:
1. Insert a tape into Deck B.
[REC PAUSE/START]
2. After press
[REC PAUSE/START]
3. Mode: Record
MD/VIDEO (AUDIO) IN (J601) : ST-S3/S5/SV7
315 Hz, 50 mV (–23.8 dB)
AF OSC
600 Ω
attenuator
4. Mode: Playback
recorded
portion
ST-
set
S3/S5/SV7
5. Confirm the play back signal recorded in step 3 becomes ad-
justable level as follows.
If these levels are not adjustable level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 4
and 5.
12
button,
button, then recording start.
ST-
set
S3/S5/SV7
level meter
+
–
MD OUT jack
(J601)
DECK B
button, press
button, then recording start.
ST-
set
S3/S5/SV7
level meter
+
–
MD OUT jack
(J601)
Adjustable level:
MD OUT jack PB level: 47.2 to 53.0 mV (–27.3 to –26.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
REC LEVEL
(R-CH)
PB LEVEL
RV351
blank tape
CN-123
RV301
RV303
RV302
IC303
[LEAF SW BOARD] (Component Side)
TAPE SPEED
(NORMAL) (HIGH)
RV1002
RV1001
blank tape
CS-123
DECK A
(L-CH)
REC LEVEL
(L-CH)
DECK B
PB LEVEL
(L-CH)
CN311
REC BIAS
(R-CH)
RV354
REC BIAS
IC302
(L-CH)
RV304
CN1001