Sony CFD-Z125 Service Manual page 17

3. Phase Check
Mode: playback
test tape
P-4-A063
(6.3kHz, –10dB)
L-CH
set
R-CH
screen pattern
45 °
in phase
good
4. After the adjustment, lock the screws with locking compound.
Adjustment Location :
Deck
screwdriver
oscilloscope
L-CH
32 Ω
V H
32 Ω
R-CH
SPEAKER terminal (JK302)
90 ° 135 ° 180 °
wrong
Tape Speed Adjustment
Procedure :
Mode : Playback
test tape
WS-48B
(3kHz, 0dB)
Adjustment Value : normal tape speed (3,000Hz)
Speed checker
–3.0 to 3.0%
Frequency difference between the beginning and the end of the
tape should be within 3% (90Hz).
Adjustment Location : Motor, M601
— 17 —
speed checker
LFM-30 or
digital frequency
counter
3.2 Ω
set
SPEAKER Terminal
(JK302)
Digital frequency counter
2,985 – 3,015Hz
Tape speed adjustment
control inside motor, M601
+
–