Read Sony BMZ-K33 / CX-BK33 Service Manual online
28
CX-BK33
SECTION 6
ELECTRICAL ADJUSTMENTS
•
Precaution
1. The adjustment should be performed with the rated power
supply voltage.
2. The adjustments should be performed for both L-ch and R-ch.
0 dB = 0.775 V
DECK SECTION
RECORD BIAS ADJUSTMENT
Procedure:
1. Record mode
2. Mode: Playback
i-Bass OFF
BASS 0
TREBLE 0
BASS 0
TREBLE 0
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjustment the SFR452
(L-ch) and SFR451 (R-ch) to repeat steps 1 and 4.
Adjustment level: Playback output of 315 Hz to playback output
of 10 kHz: 0
±
1.0 dB (0
±
4.5mV).
Adjustment Location: DECK board
+
–
–
set
recorded
portion
portion
SPEAKER board
SPEAKER
terminal (JK502)
SPEAKER
terminal (JK502)
level meter
attenuator
set
MAIN board
MD (AUX) IN jack (JK602)
MD (AUX) IN jack (JK602)
1) 315 Hz
2) 10 kHz
2) 10 kHz
50 mV (–23.8 dB)
600
Ω
blank tape
CN-123
CN-123
AF OSC
— DECK BOARD (Component Side) —
SFR451
REC Bias
Adjustment
(R-ch)
SFR452
REC Bias
Adjustment
(L-ch)
JK602
MD (AUX) IN jack (R-CH)
MD (AUX) IN jack (L-CH)
– MAIN Board (Conductor Side) –
– SPEAKER Board (Conductor Side) –
SPEAKER terminal (L-CH)
SPEAKER terminal (R-CH)
JK502
CN503
4
1
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