Sony CMT-CNEZ3 Service Manual page 59

3. ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775 V
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
• Test Tape
Tape Signal
P-4-A063 6.3 kHz, -10 dB
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note: Remove the cover (azimuth) before this adjustment.
Procedure:
1. Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
Used for
Azimuth Adjustment
HEAD PHONE board
PHONES jack
(J500)
level meter
+
–
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
test tape
HEAD PHONE board
P-4-A063
PHONES jack
(6.3 kHz, –10 dB)
(J500)
set
waveform of oscilloscope
in phase 45 °
good
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Record/Playback/Erase Head
HCD-NEZ3/NEZ5
within
1dB
Screw
position
R-CH
peak
oscilloscope
V H
90 ° 135 ° 180 °
wrong
7