Sony HCD-FL3, Руководство по обслуживанию, Страница: 26 / 170

26
HCD-FL3
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.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
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]
button.
Procedure:
1. Press
? / 1
button to turn the set ON.
2. Press three buttons
x
,
[DISPLAY]
and
[CD SYNC HI-DUB]
simultaneously.
To release from the test mode, press the
?
/ 1
button.
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the
hH button on the deck B.
3. Press the
[CD SYNC HI-DUB]
button in playback mode.
Then at HIGH speed mode.
4. Adjust RV1001 on the SW board so that frequency counter reads
6,000 ± 180 Hz.
5. Press the
[CD SYNC HI-DUB]
button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the SW board so that frequency counter reads
3,000 ± 90 Hz.
Adjustment Location: SW board
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)
(WS-48B)
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
SP
REALY
baord
CN804
set
test tape
P-4-A100
(10 kHz, –10 dB)
pin
5
oscilloscope
L-CH
R-CH
V H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good wrong
pin
3
pin
2
L
R
+
–
set
test tape
WS-48B
(3 kHz, 0 dB)
SP RELAY board
CN804 Pin
3
(GND)
SP RELAY board
CN804
Pin
2
(L-CH)
Pin
5
(R-CH)
frequency counter
forward reverse