Sony MHC-MG110 Manual page 19

Record/Playback Head Azimuth Adjustment
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback (FWD)
test tape
MAIN AMP board
P-4-A100
FRONT SPEAKER terminal (J501)
(10 kHz, – 10 dB)
L-CH, R-CH
set
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
L-CH
1dB
peak
Output
level
R-CH
peak
Screw
position
3. Mode: Playback
MAIN AMP board
FRONT SPEAKER terminal (J501)
test tape
L-CH
P-4-A100
(10 kHz, – 10 dB)
L-CH
set
R-CH
R-CH
waveform of oscilloscope
in phase 45°
good
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
level meter
+
–
within
1dB
Screw
position
L-CH R-CH
peak
peak
oscilloscope
V H
90° 135° 180°
wrong
HCD-MG110/MG310AV
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
forward
reverse
DECK B
Tape Speed Check
Mode: Playback
test tape
WS-48A
(3 kHz, 0 dB)
set
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
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)
Ver 1.1 2001.05
frequency counter
+
–
(WS-48A)
17