17
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. 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 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
Deck A is RV302 (L-CH) and RV352 (R-CH), Deck B is RV303
(L-CH) and RV353 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level:
CN301 PB level: 301.5 to 338.3 mV (–8.2 to –7.2 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
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-L300
(315 Hz, 0 dB)
main board
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
forward
reverse
Содержание HCD-BX9
Страница 37: ...HCD BX9 DX9 37 37 7 16 SCHEMATIC DIAGRAM LEAF SW SECTION Page 28 09 NORMAL SPEED HIGH SPEED ...
Страница 38: ...HCD BX9 DX9 38 38 7 17 PRINTED WIRING BOARD DRIVER SECTION 09 1 2 A B C D E F G 3 4 5 6 Page 26 ...
Страница 39: ...HCD BX9 DX9 39 39 7 18 SCHEMATIC DIAGRAM DRIVER SECTION 09 Page 29 C712 0 1 ...
Страница 41: ...HCD BX9 DX9 41 41 7 20 SCHEMATIC DIAGRAM TRANS SECTION BX9 MODEL Page 31 TRANSFORMER F973 T4A 250V 31 31 ...
Страница 43: ...HCD BX9 DX9 43 43 7 22 SCHEMATIC DIAGRAM TRANS SECTION DX9 MODEL CN978 VH VH GND G F973 T4A 250V F972 T4A 250V ...
