Sony HCD-J300 Service Manual page 28

HCD-J300
QQ
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3. Mode: Playback
test tape
P-4-A100 SJ301
(10kHz, –10dB) SPEAKER
Output Terminal
L
set
R
R-ch
Waveform of oscilloscope
45 °
in phase
good
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location:
Adjustment point
TE
L 13942296513
(Top view)
Tape Speed Check
Procedure:
1. MODE : Playback.
test tape
P-4-L300
(315Hz, 0dB)
SJ301
Output Terminal
set
2. Insert the WS-48B into deck.
www
Press the Y button of deck.
3.
4. Check the reading of frequency counter becomes 3000 ± 90
Hz.
.
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.35%
(test tape: WS-48B)
28
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oscilloscope
GND
6 Ω
6 Ω
90 ° 135 ° 180 °
wrong
frequency
counter
SPEAKER
6 Ω
x ao
y
i
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8
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.)
Insert a tape into deck, press the z REC (TAPE) button, and
2.
then press the X (TAPE) button to start recording.
3. Mode: Record
AF OSC
attenuator
4. Mode: Playback
recorded
position
set
Q Q
3 6 7 1 3
5. The playback output level should be –4.5 ±3 dB (60 Hz),
1 ±3 dB (8 kHz) and –3 ±3 dB (10 kHz).
u163
.
2 9 9 4 2 8
PJ301
ANALOG IN
1) 60 Hz
109 mV (–17 dB)
2) 5 kHz
3) 10 kHz
blank tape
600 Ω
CS-123
set
level meter
SJ301
SPEAKER
6 Ω
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9