Read Sony HCD-VP700 Service Manual online
18
HCD-VP700
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.
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
In the test mode, the tape speed is high during pressing the
CD SYNC HI-DUB
button.
Procedure:
1. Turn the power switch on.
2. Press the x button, DISPLAY button and DISC 3 button
1. Turn the power switch on.
2. Press the x button, DISPLAY button and DISC 3 button
simultaneously.
(Cursor segment flash on the FL display tube.)
To exit from the test mode, press the ?/1 button.
(Cursor segment flash on the FL display tube.)
To exit from the test mode, press the ?/1 button.
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the Y button on the deck B.
3. Press the CD SYNC HI-DUB button in playback mode.
2. Press the Y 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 LEAF SW board do that frequency
counter reads 6,000
± 30 Hz.
5. Press the CD SYNC HI-DUB button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000
± 15 Hz.
Adjustment Location: LEAF SW board
Playback level Adjustment
DECK A DECK B
Procedure:
Mode: Playback
Mode: Playback
Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that
adjustment within adjustment level as follows.
Adjustment Level:
adjustment within adjustment level as follows.
Adjustment Level:
CN301 PB level: 334 to 375 mV (–6.8 dB
± 0.5 dB) level
difference between the channels: within
±0.5 dB
Adjustment Location: MAIN board
Sample Volue of Wow and Flutter: 0.3% or less W. RMS
(WS-48B)
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
MAIN
board
CN301
set
board
CN301
set
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
pin 1
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
° 90° 135° 180°
good
wrong
pin 2
pin 3
L
R
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
main board
CN301 (Pin 3 : L-CH)
CN301 (Pin 3 : L-CH)
(Pin 1 : R-CH)
frequency counter
+
–
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
main board
CN301 (Pin 3 : L-CH)
CN301 (Pin 3 : L-CH)
(Pin 1 : R-CH)
level meter
forward
reverse
Click on the first or last page to see other HCD-VP700 service manuals if exist.