— 19 —
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 (FWD)
4. Repeat steps 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Record/Playback Head (Deck A and B)
and main board.
Tape Speed Adjustment
DECK A
Notes:
• 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
H. SPEED DUB button.
Procedure:
1. Turn the power switch on.
2. Press the GROOVE button, ENTER/NEXT button and
DISC 4 button simultaneously.
To exit from the test mode, press the POWER button.
Mode: Playback (FWD)
Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301
(L-CH) and RV401 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level:
CN207 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: AUDIO and main boards
1. Insert the WS-48B into the deck A and the blank tape into the
deck B.
2. Press the REC button and
·
button on the deck B. Then
the deck B is at recording mode.
3. Set the deck A to playback mode.
4. Keep pressing the H. SPEED DUB button in playback mode.
Then at HIGH speed mode.
5. Adjust RV652 on the AUDIO board do that frequency counter
reads 6,000 ± 60 Hz.
6. Take off the H. SPEED DUB button.
Then at NORMAL speed mode.
7. Adjust RV651 on the AUDIO board so that frequency counter
reads 3,000 Hz.
8. Frequency difference between deck A and deck B the beginning
of the tape should be within ± 1.5%.
Adjustment Location: AUDIO board
+ 30
– 10
Screw
position
L-CH
peak
within
1dB
output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
main
board
CN207
set
test tape
P-4-A100
(10kHz, –10dB)
pin
3
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
pin
2
pin
1
L
R
reverse
forward
+
–
set
test tape
WS-48B
(3 kHz, 0 dB)
main board
CN207 (Pin
1
: L-CH)
(Pin
3
:R-CH)
frequency counter
+
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
main board
CN207 (Pin
1
: L-CH)
(Pin
3
: R-CH)
level meter
Sample Value of Wow and flutter
W.RMS (JIS) within 0.3%
(test tape: WS-48B)
Playback level Adjustment
DECK A
DECK B
Procedure:
Mode: Playback (FWD)
Summary of Contents for HCD-D390 - Compact Audio And Video System
Page 7: ... 7 This section is extracted from instruction manual ...
Page 33: ...HCD D390 D790 G5500 XB33 XB44 XB50 XB60 41 42 6 6 SCHEMATIC DIAGRAM CD MOTOR SECTION ...
Page 39: ...HCD D390 D790 G5500 XB33 XB44 XB50 XB60 6 12 SCHEMATIC DIAGRAM DECK SECTION 51 52 ...
Page 40: ...HCD D390 D790 G5500 XB33 XB44 XB50 XB60 6 13 SCHEMATIC DIAGRAM SWITCH SECTION 53 54 ...
Page 43: ...HCD D390 D790 G5500 XB33 XB44 XB50 XB60 57 58 6 16 SCHEMATIC DIAGRAM HEADPHONE MIC SECTION ...
