Read Sony BMZ-K1 / CX-BK1 Service Manual online
26
CX-BK1
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Record/Playback/Erase Head
set
test tape
P-4-A100
(10 kHz, – 10 dB)
P-4-A100
(10 kHz, – 10 dB)
R-CH
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
SPEAKER board
SPEAKER terminal (JK502)
L-CH
SPEAKER terminal (JK502)
L-CH
Record Bias Adjustment
Procedure:
1.
1.
Record mode
2.
Mode: Playback
i-Bass OFF
BASS 0
TREBLE 0
i-Bass OFF
BASS 0
TREBLE 0
3.
Confirm playback the signal recorded in step 1 become
adjustment level as follows.
adjustment level as follows.
4.
If these levels do not adjustment level, adjustment the SFR451
(L-CH) and SFR452 (R-CH) to repeat steps 1 and 4.
(L-CH) and SFR452 (R-CH) to repeat steps 1 and 4.
Adjustment level: Playback output of 315 Hz to playback out-
put
of 10 kHz: 0
of 10 kHz: 0
± 1.0 dB (0 ± 4.5mV).
Adjustment Location: DECK board (Page 27)
+
–
–
set
recorded
portion
portion
SPEAKER board SPEAKER terminal (JK502)
level meter
attenuator
set
MAIN board
AUX IN jack (JK602)
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
Tape Speed Check
Mode: Playback
1. Insert the WS-48B into the deck.
2. Press the
2. Press the
B
button.
3. Confirm that the frequency counter reads 3,000
± 90 Hz.
Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48B)
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
SPEAKER board
SPEAKER terminal (JK502)
L-CH, R-CH
SPEAKER terminal (JK502)
L-CH, R-CH
frequency counter
adjustment screw
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