RCA SelectaVision VideoDisc SFT 100 Service Data page 53

Symptom Description
At 10 to 18 minutes into all discs,
stylus skips forward over one to two
minutes of the program.
Rubbing noise when function lever
is returned to Load position from
Play position.
Picture repeats or jumps similar to
locked groove. (Servo does not ри!
arm free of landing latch because
clutch slips or improper landing
latch operation.)
Random skipping sometimes with
intermittent visual search operation.
Plays in Off position.
(2)
Corrective Action
Reduce excessive end play of worm
gear, Symbol No. 107, by adding
washers between "C" Ring Symbol
No. 111, and reduction gear assembly
housing. Reduce play to .010"+ .005".
Check PW ACIN board cover for
warpage. If warped, replace with
Stock no. 151972, or elongate holes,
push down, and tighten screws.
Check adjustment of pickup arm servo
drive rack gear, Symbol No. 102.
Check landing latch gear, Symbot
No. 114. И unable to adjust rack gear
to landing latch gear for smooth
operation, replace landing latch
assembly, stock no. 151973.
Check clutch operation. In Load/
Unload, clutch should be free (cam
engaged). In Play/Off, cam should
be free (сішісһ engaged). If clutch
cams are not completely free in Play/
Off position adjust clutch tension by
adding one or two .010" washers,
Symbol 121, stock no. 152569, to
clutch shaft as needed.
Check turntable height with field
height gauge, stock no. 149239, See
Data for proper adjustment procedure.
Check stylus cartridge.
Try known good disc to eliminate
possible disc problem
Check servo detector balance
adjustment R520 and arm servo
position adjustment R917. See Data
for adjustment procedure.
Check pick-up arm for smooth
travel — no hang-ups.
Check turntable slider cam and 52/54
switch cam adjustments. If 52/54
switch cam adjustments are incorrect
and turntable shaft follower is on
ramp portion of cam, elbow-shaft
assembly Item 119, may have been
damaged (stripped) by operator
misuse. (Forcing function lever with
caddy in).
Reference Data
File CED-1
Service Information No. 1
Symptom No. 11
Service Data CED-1
CED-1
Service Data
File CED-1
Service Information No. 1
Symptom І
Service Data CED-1
CED-1
Service Data
Service Information No. 6
CED-1
Service Data
Service Information No. 2
SPS 3601
Special instructions included
with parts kit.