Samsung TT14A54X/XAX, Руководство по обслуживанию

Страница: 12 / 56

Alignments and Adjustments (VCR)
Samsung Electronics 3-5
4. If Fig. 3-12 A does not meet the specification,
adjust the S-guide roller up or down.
5. If Fig. 3-12 B does no meet the specification,
adjust the T-guide roller up or down.
6. Slightly loosen the set screw at the lower part
of S, T-guide rollers using a hex wrench
(diameter : 0.9mm), so that the guide rollers
can be adjusted with reasonable tightness
(Fig. 3-13).
Fig. 3-12 Adjustment Points
A B
A B
H'D SWITCHING
PULSE
ENVELOPE
7. Play back the Mono Scope alignment tape (SP
Mode).
8. Connect CH1 to JM114 (ENV), and CH2 to
JM113 (HÕD) for taking sync (located on the
same PCB).
9. Turn the guide roller head with a flat head
screw driver ( ) to obtain a flat video RF
envelope as shown in Fig. 3-14.
10. After completing the adjustments, tighten the
set screw.
Fig. 3-13
SET SCREW
GUIDE ROLLER
Fig. 3-14 S, T-Guide Roller Height Adjustment
IDEAL ENVELOPE
S HEIGHT
TOO HIGH S HEIGHT
TOO LOW T HEIGHT
TOO LOW T HEIGHT
TOO HIGH
GUIDE ROLLER S GUIDE ROLLER T