Technics RS-610US - Page 3

MECHANICAL ADJUSTMENTS
Instruments required:
Spring gauge (having a range of O~1 kgr), cassette torque meter (RP-8063N). wow & tape speed test tape
(C-WAN), Digital frequency counter, Wow meter.
MEASURMENT
METHOD
ADJUSTMENT
METHOD
REMARKS
Pressure roller
adjustment.
Playback
400+50 er
Hook the spring gauge to
pressure roller lever and
pull it in the direction of
the arrow as shown in
fig. 4.
Adjust by bending the
(a) part of the
pressure roller spring.
Measure the value at
the moment when the
pressure roller moves
away the capstan.
Measurement &
adjustment of
takeup tension.
Playback
55+15 gr-cm
Mount the cassette torque
meter in the same way as
the cassette tape.
The take up tension is
shown as in fig. 5.
Turning the plate
spring, adjust frictional
force. See fig. 6.
Tape speed
deviation.
Wow & flutter.
(RMS)
Measurement of
detecting piece
tension.
Playback
+3% or less
Playback 3 kHz test tape
(C-WAN) and read the
frequency with digital
frequency counter.
Speed adjustment
VR (inside motor).
Playback
Playback
0.12% or less
50+10 ger
Playback 3 kHz test tape
(C-WAN) and read with
the wow metter.
Press part A of the
detecting piece in a
straight line in the
direction of the arrow, as
shown in fig. 7.
Adjust by bending the
(b) part of the
detecting piece
spring.
Screw Driver
Motor
(a) (Pressure Roller Spring)
Spring Gauge
Fig. 4
Plate Spring
(Indicator
CASSETTE TORQUE METER
DEREIL ES
od
{ Re-soein
oO
»~
Torque Scale
Fig. 5
Fig. 6
Detection Piece
Fig. 7