Sony M-450 - Page 8

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 –
set
Test tape
WS-24, WS-12
(3kHz, –10dB)
speed checker
or
frequency counter
earphone jack
8
Ω
Adjustment Value :
Adjustment
Speed Frequency counter
Part
RV602 2.4cm/s 2,880 – 3,120Hz
RV601 1.2cm/s 2,850 – 3,150Hz
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 –
RV602
2.4cm
RV601
1.2cm
speed adjustable resistor
s
Plate, blind