Sony CFD-Z125 - Cd Radio Cassette-corder, Руководство по обслуживанию

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3. Phase Check
Mode: playback
4. After the adjustment, lock the screws with locking compound.
Adjustment Location :
V H
oscilloscope
SPEAKER terminal (JK302)
test tape
P-4-A063
(6.3kHz, –10dB)
set
L-CH
L-CH
32
Ω
32
Ω
R-CH
R-CH
screen pattern
in phase
45
°
90
°
135
°
180
°
good wrong
Deck
screwdriver
Tape Speed Adjustment
Procedure :
Mode : Playback
Adjustment Value : normal tape speed (3,000Hz)
Frequency difference between the beginning and the end of the
tape should be within 3% (90Hz).
Adjustment Location : Motor, M601
Digital frequency counter
2,985 – 3,015Hz
Speed checker
–3.0 to 3.0%
3.2
Ω
test tape
WS-48B
(3kHz, 0dB)
set
speed checker
LFM-30 or
digital frequency
counter
SPEAKER Terminal
(JK302)
+
–
Tape speed adjustment
control inside motor, M601