Sony M-670V Service Manual page 8

M-670V/673V/675V
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
Test Tape
Part
WS-24 RV602
WS-12 RV601
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 :
[MAIN BOARD]
(SIDE B)
RV602
2.4cm/s
speed adjustable resistors
8
frequency counter
8 Ω
J102
earphone jack
Speed Frequency counter
2.4cm/s 2,880 – 3,120Hz
1.2cm/s 2,850 – 3,150Hz
RV601
1.2cm/s