Sony M-450 Service Manual page 8

M-450/455
Tape Speed Adjustment
Switch position
VOLUME : Mechanical center
VOR switch : OFF
Procedure :
After adjusting the 2.4cm/s speed, adjust the 1.2cm/s speed.
– Playback –
Test tape
WS-24, WS-12
(3kHz, –10dB)
set
Adjustment Value :
Adjustment
Speed Frequency counter
Part
RV602 2.4cm/s
RV601 1.2cm/s
Frequency difference between the beginning and the end of the
tape should be within 0.5%.
2.4cm/s (15Hz)
1.2cm/s (15Hz)
Adjustment Location :
– Back view –
8
speed checker
or
frequency counter
8 Ω
earphone jack
2,880 – 3,120Hz
2,850 – 3,150Hz
Plate, blind
RV601
1.2cm
RV602
2.4cm
speed adjustable resistors