Sony HCD-EP30 Service Manual page 12

HCD-EP30/EP40
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Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback (FWD)
test tape
P-4-A063
(6.3 kHz, –10 dB)
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
L-CH
peak
3. Mode: Playback (FWD)
TE
L 13942296513
test tape
P-4-A063
(6.3 kHz, –10 dB)
L-CH
set
R-CH
HEADPHONE board
PHONES jack (JK401)
screen pattern
45 °
in phase
good
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
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level meter
32 Ω
+
–
HEADPHONE board
PHONES jack (JK401)
within
1dB
Screw
position
R-CH
peak
oscilloscope
32 Ω
V H
+ +
– –
32 Ω
90 ° 135 ° 180 °
wrong
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Adjustment Location: Record/Playback/Erase Head.
Note: Refer to "3-7. CASSETTE LID" (see page 10)
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