16
HCD-VX555/VX555J
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.
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. Turn the power switch on.
2. Press the
x
button, ENTER button and DISC 3 button
simultaneously.
(The “TEST MODE” on the fluorescent indicator tube display
while in the test mode.)
To exit from the test mode, press the
?
/
1
button.
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the
gG
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 so 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
1. Confirm that level difference between the channels is with
±
0.5 dB.
2. After check, adjust the following RVs.
Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that
adjustment within adjustment level as follows.
Adjustment Level:
CN301 PB level: 334.4 to 748.7 mV (–7.3 to –0.3 dB)
Adjustment Location:
MAIN board
Sample Volue of Wow and Flutter: 0.3% or less W. RMS
(WS-48B)
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
MAIN
board
CN301
set
test tape
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)
MAIN board
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
frequency counter
+
–
set
test tape
P-4-L300J
(315 Hz, 0 dB)
MAIN board
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
forward
reverse
Содержание HCD-VX555
Страница 14: ...14 HCD VX555 VX555J VIDEO BOARD SIDE A J301 CN501 CN301 1 2 3 CN503 SL503 SL502 SL501 CHECK LED CN502 ...
Страница 29: ...29 29 HCD VX555 VX555J 6 5 SCHEMATIC DIAGRAM MAIN SECTION 2 4 See page 58 for IC Block Diagrams IC B D ...
Страница 35: ...35 35 HCD VX555 VX555J 6 11 SCHEMATIC DIAGRAM AMP SECTION ...
Страница 39: ...39 39 HCD VX555 VX555J 6 15 SCHEMATIC DIAGRAM PANEL SW SECTION ...
Страница 41: ...41 41 HCD VX555 VX555J 6 17 SCHEMATIC DIAGRAM LEAF SW SECTION ...
Страница 43: ...43 43 HCD VX555 VX555J 6 19 SCHEMATIC DIAGRAM DRIVER SECTION See page 59 for IC Block Diagrams IC B D ...
Страница 46: ...46 46 HCD VX555 VX555J 6 22 SCHEMATIC DIAGRAM VIDEO SECTION 2 3 See page 23 for Wavefoms ...
Страница 47: ...47 47 HCD VX555 VX555J 6 23 SCHEMATIC DIAGRAM VIDEO SECTION 3 3 See page 23 for Wavefoms ...
Страница 49: ...49 49 HCD VX555 VX555J 6 25 SCHEMATIC DIAGRAM TRANS SECTION ...
