4. If the section A in Fig. 11 does not meet the
specification, adjust the S-guide roller up or down
5.
If the section B in Fig. 11 does not meet the
specification, adjust T-guide roller up or down.
ENVELOPE
6
Slightly loosen the set screw at the lower part of the
S, T-guide rollers with a (Hex Wrench
-
0.9mm)
so that
the guide roller can be adjusted with reasonable
tightness. (Refer to Fig. 12)
l==I
-GUIDE
ROLLER
SET SCREW
Frg.
12
7. Playback the alignment tape (Mono Scope
;
SP).
8. Connect an oscrlloscope CH-1 to TP302 and CH-2 to
TP202
on the same PCB for
tnggerrng.
9. Turn the
gurde
roller heads with a flat head
(a)
screw
driver to
obtain
flat video RF envelope as shown
In
Frg.
13.
10. After the adjustment IS completed, tighten the set
screws
Frg.
11 Adjustment Points
“s”
HEIGHT
TOO HIGH
--H----
L
1
IDEAL ENVELOPE
HE3
“S”
HEIGHT
TOO LOW
TOO HIGH
“T”
HEIGHT
TOO LOW
GUIDE ROLLER
IS)
GUIDE ROLLER
(T)
Fig. 13 S, T-Guide Roller Height Adjustments
3-6
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