Sony HCD-CP2 Service Manual page 15

1. Mode: Playback (FWD)
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.
within
1dB
L-CH
peak
output
level
R-CH
peak
Screw
position
3. Mode: Playback (FWD)
test tape
P-4-A100
(10 kHz, –10 dB)
pin 8
L-CH
MAIN
L
board
IC401
R
set
R-CH
pin eg
waveform of oscilloscope
in phase 45
good
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.
forward
within
1dB
Screw
position
L-CH
R-CH
peak peak
oscilloscope
pin rs
V H
90 135 180
wrong
reverse
Tape Speed Adjustment
Procedure:
Turn the power switch on.
Mode: Playback (FWD)
test tape
WS-48B
(3 kHz, 0 dB)
set
MAIN board
IC401(Pin 8 : L-CH)
1. Insert the WS-48B into the deck A and the blank tape into the
deck B.
[HI-SPEED DUBBING]
2. Press the
Then at HIGH speed dubbing.
3. Adjust RV652 on the AUDIO board do that frequency counter
reads 6,000 ± 180 Hz.
4. Press the x (TAPE A or B) button to stop the HIGH speed
dubbing.
[REC ]
5. Press the z , X and
Then at NORMAL speed dubbing.
6. Adjust RV651 on the AUDIO board so that frequency counter
reads 3,000 ± 90 Hz.
7. Press the x (TAPE A or B) button to stop the NORMAL speed
dubbing.
8. Frequency difference between deck A and deck B the begin-
ning of the tape should be within ± 1.5%.
Adjustment Location: AUDIO and MAIN boards
Sample Value of Wow and flutter: 0.3% or less W. RMS (JIS)
Playback level Adjustment
Procedure:
Mode: Playback (FWD)
test tape
P-4-L300
(315 Hz, 0 dB)
set
MAIN board
IC401 (Pin 8 : L-CH)
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:
IC401 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
DECK A
frequency counter
+
–
(Pin eg : R-CH)
button and button.
X
Y button.
(WS-48B)
DECK A DECK B
level meter
+
–
(Pin eg : R-CH)
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