Read Sony CMT-DC500MD / HCD-J300 Service Manual online
28
HCD-J300
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
parts adjusted.
Adjustment Location:
3.
Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
oscilloscope
set
Waveform of oscilloscope
in phase
45
°
90
°
135
°
180
°
good
wrong
GND
R-ch
L
R
SJ301
SPEAKER
Output Terminal
SPEAKER
Output Terminal
6
Ω
6
Ω
Record Level Check
Procedure:
1.
Press FUNCTION button to select ANALOG IN. (This step
is not necessary if the above test mode has already been set.)
is not necessary if the above test mode has already been set.)
2.
Insert a tape into deck, press the z REC (TAPE) button, and
then press the X (TAPE) button to start recording.
then press the X (TAPE) button to start recording.
3.
Mode: Record
Tape Speed Check
Procedure:
1.
MODE : Playback.
test tape
P-4-L300
(315Hz, 0dB)
P-4-L300
(315Hz, 0dB)
SJ301
SPEAKER
Output Terminal
SPEAKER
Output Terminal
frequency
counter
counter
set
6
Ω
4.
Mode: Playback
5.
The playback output level should be –4.5 ±3 dB (60 Hz),
1 ±3 dB (8 kHz) and –3 ±3 dB (10 kHz).
1 ±3 dB (8 kHz) and –3 ±3 dB (10 kHz).
AF OSC
PJ301
ANALOG IN
1) 60 Hz
2) 5 kHz
3) 10 kHz
ANALOG IN
1) 60 Hz
2) 5 kHz
3) 10 kHz
blank tape
CS-123
CS-123
set
attenuator
600
Ω
109 mV (–17 dB)
recorded
position
position
level meter
set
6
Ω
SJ301
SPEAKER
SPEAKER
(Top view)
Adjustment point
2.
Insert the WS-48B into deck.
3.
Press the Y button of deck.
4.
Check the reading of frequency counter becomes 3000 ± 90
Hz.
Hz.
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.35%
(test tape: WS-48B)
(test tape: WS-48B)
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