Sony HCD-MG110, Руководство по обслуживанию

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17
HCD-MG110/MG310AV
Tape Speed Check
DECK B
Mode: Playback
1. Insert the WS-48A into the deck B.
2. Press the
nN button on the deck B.
3. Confirm that the frequency counter reads 3,000
±
60 Hz.
Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48A)
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. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
set
test tape
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
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH
+
–
set
test tape
WS-48A
(3 kHz, 0 dB)
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
frequency counter
Record/Playback Head Azimuth Adjustment
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback (FWD)
DECK A DECK B
set
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
+
–
level meter
test tape
P-4-A100
(10 kHz, – 10 dB)
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
reverse
forward
Ver 1.1