Sony CX-BK1, Руководство по обслуживанию

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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)
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
Record Bias Adjustment
Procedure:
1.
Record mode
2. Mode: Playback
i-Bass OFF
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 SFR451
(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
± 1.0 dB (0 ± 4.5mV).
Adjustment Location: DECK board (Page 27)
+
–
set
recorded
portion
SPEAKER board SPEAKER terminal (JK502)
level meter
attenuator
set
MAIN board
AUX IN jack (JK602)
1) 315 Hz
2) 10 kHz
50 mV (–23.8 dB)



600 Ω
blank tape
CN-123
AF OSC
Tape Speed Check
Mode: Playback
1. Insert the WS-48B into the deck.
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)
SPEAKER board
SPEAKER terminal (JK502)
L-CH, R-CH
frequency counter
adjustment screw