Electrical Adjustments - Sony HCD-GX570 - Cd Deck Receiver Component Service Manual

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.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
TEST TAPE
Tape Signal
P-4-A063 6.3 kHz, -10 dB
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note 1: Remove the mecha deck before this adjustment.
(Refer to Section 3. DISASSEMBLY (See page 9))
Note 2: Perform this adjustment for both decks.
Procedure:
1. Mode: Playback
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
test tape
MIC. AUX. HP board
P-4-A063
PHONES jack
(6.3 kHz, –10 dB)
(J701)
set
waveform of oscilloscope
in phase 45
good
SECTION 6

ELECTRICAL ADJUSTMENTS

Used for
Azimuth Adjustment
MIC. AUX. HP board
PHONES jack
(J701)
level meter
+
–
within
1dB
Screw
position
R-CH
peak
oscilloscope
V H
90 135 180
wrong
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (DECK-A)
Record/Playback/Erase Head (DECK-A)
HCD-GX470/GX570
21