– 32 –
Record bias Current Adjustment DECK B
Procedure:
1. Mode: Record
2. Mode: Playback
+
–
set
recorded
portion
CN207 (Pin
1
: L-CH)
(Pin
3
: R-CH)
level meter
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 output
of 10kHz: ±0.5 dB
Adjustment Location: AUDIO and main boards
Record Level Adjustment DECK B
Procedure:
1. Mode: Record
Adjustment Location: Main board
[MAIN BOARD] (Component Side)
[AUDIO BOARD] (Conductor Side)
attenuator
set
Pin
6
(L-CH) of IC1501 on the main board.
Pin
#¶
(L-CH) of IC1501 on the main board.
1) 315 Hz
2) 10 kHz
50 mV (–23.8 dB)
Pin
2
(GND) of ICN207 on the main board.
600
Ω
blank tape
CN-123
AF OSC
2. Mode: Playback
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV1501 (L-
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)
set
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)
blank tape
CS-123
Pin
2
(GND) of CN207 on the main board.
600
Ω
attenuator
AF OSC
RECORD
BAIS
TAPE SPEED
(NORMAL)
RV651
®
(HIGH)
RV652
®
RV311
L
®
RV411
R
®
PB
LEVEL
RV441 RV341
RV301
®
L
RV401
®
R
R
L
– DECK B –
– DECK A –
PB LEVEL
+
–
set
recorded
portion
CN207 (Pin
1
: L-CH)
(Pin
3
: R-CH)
level meter
RV1501
IC1501
CN20
CN207
RV1551
RECORD LEVEL
IC301
IC201
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