Read Sony HCD-GS200 / MHC-GS200 Service Manual online
20
HCD-GS200
Tape Speed Check
Mode: Playback
1. Insert the WS-48B into the deck.
2. Press the bB button on the deck.
3. Confirm that the frequency counter reads 3,000
2. Press the bB button on the deck.
3. Confirm that the frequency counter reads 3,000
±
90 Hz.
Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48B)
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.
so that outputs match within 1dB of peak.
3. Mode: Playback
4. Reapeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
set
test tape
P-4-A100
(10 kHz, – 10 dB)
P-4-A100
(10 kHz, – 10 dB)
R-CH
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
AMP board
FRONT SPEAKER terminal (J501)
L-CH
FRONT SPEAKER terminal (J501)
L-CH
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
FRONT SPEAKER terminal (J501)
L-CH, R-CH
frequency counter
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback (FWD)
1. Mode: Playback (FWD)
set
AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
FRONT SPEAKER terminal (J501)
L-CH, R-CH
+
–
–
level meter
test tape
P-4-A100
(10 kHz, – 10 dB)
P-4-A100
(10 kHz, – 10 dB)
Adjustment Location: Record/Playback/Erase Head
Head azimuth
adjustment screw
adjustment screw
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