Read Sony HCD-ED2 Service Manual online
10
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 1 dB of peak.
that outputs match within 1 dB of peak.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location :
Tape Speed Adjustment
Procedure :
Mode : Playback
Mode : Playback
3. Mode : Playback
1. Insert the WS-48B into the deck, and playback.
2. Adjust the Control at the bottom hole of the motor (M901) so
2. Adjust the Control at the bottom hole of the motor (M901) so
that the frequency counter reading becomes 3000 ± 90 Hz.
Adjustment Location : MOTOR (M901)
oscilloscope
MD OUT (JK301)
set
MD OUT (JK301)
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
L
R
Waveform of oscilloscope
good
wrong
in phase
45
°
90
°
135
°
180
°
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
output
level
level
within
1dB
1dB
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
within 1dB
+
–
–
MD OUT (JK301)
set
frequency counter
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
REV side
FWD side
Adjustment screw
Remove the front panel(B)
claw
claw
level meter
MD OUT (JK301)
set
test tape
P-4-L300
(315Hz, 0dB)
P-4-L300
(315Hz, 0dB)
Deck is VR703 (L-CH) and VR704 (R-CH)
so that adjustment within the following adjustment level.
so that adjustment within the following adjustment level.
Adjustment level :
Playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level dif-
ference between the channels: within ±0.5 dB
ference between the channels: within ±0.5 dB
Adjustment Location : TAPE PREAMP board
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
Playback Level Adjustment
Procedure :
Mode : Playback
Mode : Playback
Adjusting hole
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