Read Sony CX-LMNV5 / XR-MNV5 Service Manual online
23
CX-LMNV5
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
MAIN board
SPEAKER terminal (J201)
L-CH
SPEAKER terminal (J201)
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 output
of 10 kHz: 0
±
1.0 dB (0
±
4.5mV).
Adjustment Location: MAIN board
[MAIN BOARD] – Component Side –
+
–
–
set
recorded
portion
portion
MAIN board speaker terminal (J201)
level meter
attenuator
set
MAIN board
AUX IN (J602)
AUX IN (J602)
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 Y button on the deck.
3. Confirm that the frequency counter reads 3,000
2. Press the Y button on the deck.
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)
MAIN board
SPEAKER terminal (J201)
L-CH, R-CH
SPEAKER terminal (J201)
L-CH, R-CH
frequency counter
Note: Refer to “3-6. Cassette Panel” (see page 9)
adjustment screw
SFR452
Record Bias
Adjustment(R-CH)
Record Bias
Adjustment(R-CH)
SFR451
Record Bias
Adjustment(L-CH)
Record Bias
Adjustment(L-CH)
IC601
IC901
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