JVC RC-250L Service Manual page 6

RC-250L/LB
FM RF Alignment
Input (SSG):
Use 75 9 terminal, modulation 400 Hz, modulated to 22.5 kHz deviation.
ae
Input Signal
Step Frequency
Place to be aligned
Set the V. Capacitor to
Band Frequency Given to
—
=
|
1 87.5 MHz Rod Antenna LL L3 _ Maximum
2
109 MHz Terminal
TC-2
Minimum
p= | a _
3 au Repeat the Steps 1 & 2.
4
90 MHz Ie een eine
1
[ 90 MHz Signal
5
106 MHz
Terminal
TC-1
106 MHz Signal
6 Repeat the Steps 4 & 5, and adjust for no further improvement.
Parts Arrangement for Alignment
TP
uty
be creas [7 a
TP2@-|1c2__
On tea_} = C2 |
Tl 3
TC5 TC6
T3ypgIP5 |
1P7 $
TS
t7L]LIT6
Fig. 7
Adjustment of Cassette Mechanism
Playback Torque
1. The playback torque should be within 45 to 70 g-cm.
2. If the torque is less than 45 g-cm, set the two-flat clutch
spring plate of the take-up reel disk to the 4 position.
If the torque exceeds 70 g-cm, set the spring plate to the
2 position.
Note: Before adjusting the torque wipe off the surface of
rubber parts and rotating parts, if the torque is not
sufficient.
No. 1409