Sony HCD-GX8000 Service Manual page 19

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3 7 63 1515 0
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
L-CH
peak
Output
level
R-CH
peak
Screw
position
3. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
L-CH
MAIN
board
CN301
set
R-CH
TE
L 13942296513
in phase 45 °
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
www
.
forward
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within
1dB
within
1dB
L-CH
R-CH
peak peak
oscilloscope
pin 1
pin 2
L
V H
R
pin 3
waveform of oscilloscope
90 ° 135 ° 180 °
good wrong
Record/Playback/Erase Head (Deck B).
x ao
y
i
reverse
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8
TAPE SPEED ADJUSTMENT DECK B
Note: Start the Tape Speed adjustment as below after setting to the test
mode.
In the test mode, the tape speed is high during pressing the
[CD SYNC HI-DUB]
Procedure:
?/1
1. Press
2. Press three buttons
To release from the test mode, press the
Mode: Playback
test tape
WS-48B
Screw
(3 kHz, 0 dB)
position
1. Insert the WS-48B into the deck B.
2. Press the hH button on the deck B.
3. Press the
Then at HIGH speed mode.
4. Adjust RV1001 on the SW board so that frequency counter reads
6,000 ± 180 Hz.
5. Press the
Then back to NORMAL speed mode.
6. Adjust RV1002 on the SW board so that frequency counter reads
3,000 ± 90 Hz.
Q Q
Adjustment Location: SW board
3 6 7 1 3
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)
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.
HCD-GX8000/RG77
2 9 9 4 2 8
button.
button to turn the set ON.
[ENTER] [DISC 3]
x , and
MAIN board
CN301
frequency counter
Pin 1 (L-CH)
Pin 3 (R-CH)
+
set
–
MAIN board
CN301 Pin 2 (GND)
[CD SYNC HI-DUB]
button in playback mode.
[CD SYNC HI-DUB]
button.
1 5 0 5 8 2 9 9 4
(WS-48B)
m
co
9 9
simultaneously.
?/1 button.
2 8 9 9
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