RCA SelectaVision VideoDisc SFT 100 Service Data page 74

CED-1 Addendum-2
MECHANICAL ADJUSTMENTS
(continued)
3. Check antenna switch action by placing function lever in
"otf" position and then in "play" position to be certain anten-
na switch is operating properly (Figs. 3-4 & 2-13).
Antenna Switch
Link
Push Rod
Cap
Antenna Switch
Assist Spring
Fig. 3-4. Antenna Push Rod Cap
82 AC Power "ON" Switch Cam Adjust
1. Place function switch lever in "off" position.
2. Loosen allen head set screw (.050") in S2 cam (item 19) зпа
position cam so that switch S2 is just turned "off" and tighten
Set screw, Figs. 3-5 & 2-13.
3. Place function switch lever in "Play" position and check that
Switch S2 is "on".
Cum erg rere
AC AC
Pla й Ромег
Switch "a li E Switch
S4 4 52
Fig. 3-5. AC Play/Power Switch Cam
$3 DC Play Switch Cam Adjust
1. Place function switch lever in "Play" position.
2. Loosen allen head set screw (.050") in S3 cam (item 71) and
position cam so that switch S3 is "on" and tighten set screw,
Figs. 3-6 & 2-13.
3. Place function switch lever in "Load" position, switch S3
should be "off". Place function switch lever in "Play" and
"off" positions - Switch "S3" should be "on".
Landing
Latch DC Play
Switch Switch
59 53
Fig. 3-6. DC Play Switch Сат
$4 AC Play Switch Cam Adjust
Use same procedure as set forth for S3 DC Play Switch, Figs. 3-5
& 2-13.
Lifter Latch Switch Adjust (59)
1. Place function lever in "Load" position.
3-2
2. Loosen allen head set screw оп 59 actuating cam and posi-
tion cam to the point just prior to switch activation (click).
3. Check operation: Switch S9 (Lifter Latch Switch) must turn
"off" (open) just prior to S3 (DC Play Switch) activation (turn
"on") when function lever is moved from "load" to "play"
position. Conversely S3 (DC Play Switch) must turn "off"
(open) just prior to S9 (Lifter Latch Switch) turn "on" (close)
when function lever is moved (тот "play" to "load" position.
Radius Sensor Assembly
When replacing pickup arm assembly, be certain pickup arm is in
it's outermost position and the radius sensor assembly is almost
in the full counterclockwise position, Figs. 3-9 & 2-11.
NOTE: Rotate radius sensor gear full counterclockwise. Just
before mashing radius sensor gear and pickup arm gear
tack rotate radius sensor clockwise about 2 to 3 gear
teeth. DO NOT completely bottom out radius sensor
Pick-up Arm
Gear Rack
Fig. 3-7. 'Radius Sensor Assembly
Turntable Height Adjust
To check turntable height - remove stylus cartridge from pick-up
arm assembly, insert turntable height gauge (Stock No. 149239).
Piace disc in player in "PLAY" mode with AC cord removed from
power source. Hold height gauge in arm assembly firmly - be sure
plunger is free to indicate properly, Fig. 3-8.
CAUTION: Use old disc or reserve one side of test disc for this
procedure. DO NOT use a good disc for this pro-
cedure.
Gauge resting on second мер
Indicates proper штіьы» height
Pin must reat on Disc п "PLAY" mode.
АС cord removed from power вошсе—а
Fig. 3-8. Turntable Height Gage
1. If gauge remains on lowest step — Remove yoke assembly
and spindle, raise turntable height by adjusting turntable
height adjust screw clockwise (item 2 Fig. 3-9). Replace врїп-
dle and yoke assembly.
2. lf gauge moves to highest step — Remove yoke assembly and
spindle, lower turntable height by adjusting turntable height
adjust screw counterclockwise (item 2, Fig. 2-13). Replace
Spindle and yoke assembly.
3. Proper turntable height — when gauge is on center step of
height gauge turntable is at correct height.
NOTE: Turntable height adjust is a allen head screw ac-
cessible from top with long portion of extra long
(125") allen wrench. DO NOT mar the inside of
turntable spindle during this adjustment.