4-20
Samsung Electronics
Disassembly and Reassembly
4-5-2 Linearity adjustment
(Guide roller S, T adjustment)
1) Playback the Mono Scope alignment tape (SP mode).
2) Observe the video envelope signal on an oscillo-
scope (triggered by the video switching pulse).
3) Make sure the video envelope waveform (at its
minimum) meets the specification shown in
Fig. 4-5-4.
If it does not, adjust as follows :
Note :
a=Maximum output of the video RF envelope.
b=Minimum output of the video RF envelope at the
entrance side.
c=Minimum output of the video RF envelope at the
center point.
d=Maximum output of the video RF envelope at the
exit side.
4) If the section A in Fig. 4-5-5 does not meet the
speci-fication, adjust the guide roller S up or
down.
5) If the section B in Fig. 4-5-5 does not meet the
speci-fication, adjust the guide roller T up or down.
Fig. 4-5-4 Envelope Waveform Adjustment
a
a b c d
c,b,d/a 63%
b
c
d
Fig. 4-5-5 Adjustment Points
A
B
A
B
H'D SWITCHING
PULSE
ENVELOPE
6) Play back the Mono Scope alignment tape (SP mode).
7) Connect an oscilloscope CH-1 to the Envelope and CH-2 to the H’D SW Pulse for triggering.
8) Turn the guide roller heads with a flat head ( ) driver to obtain a flat video RF envelope as shown in Fig. 2-8.
Fig. 4-5-6 Guide Roller S, T Height Adjustment
IDEAL ENVELOPE
S HEIGHT TOO HIGH
S HEIGHT TOO LOW
T HEIGHT TOO HIGH
T HEIGHT TOO LOW
GUIDE ROLLER S
GUIDE ROLLER T
Summary of Contents for TB14A53X/RAD
Page 10: ...10 Wiring Diagram 10 1 C15C Wiring Diagram Wiring Diagram Samsung Electronics 10 1 ...
Page 14: ...Schematic Diagrams 11 4 Samsung Electronics 11 4 VCR POWER BLOCK Power Line Signal Line ...
Page 18: ...Schematic Diagrams 11 8 Samsung Electronics 11 8 TV MAIN 4 4 Power Line Signal Line ...
Page 19: ...Schematic Diagrams 11 9 Samsung Electronics 11 9 TUNER IF NICAM STEREO Power Line Signal Line ...
Page 20: ...Schematic Diagrams 11 10 Samsung Electronics 11 10 2 nd IF STEREO Power Line Signal Line ...
Page 26: ...Wiring Diagram 10 2 Samsung Electronics 10 2 C15C Wiring Diagram ...
Page 61: ...Troubleshooting 6 24 Samsung Electronics MEMO ...
Page 77: ...Alignment and Adjustments Electrical 5 16 Samsung Electronics MEMO ...
Page 102: ...MEMO 2 2 Samsung Electronics ...
Page 106: ...ELECTRONICS Samsung Electronics Co Ltd Jun 2001 Printed in Korea AA68 01729A ...