Samsung DVD-V440 Service Manual page 14

Alignment and Adjustments
6) Play back the Mono Scope alignment tape (SP mode).
7) Connect an oscilloscope CH-1 to the "Envelope" and CH-2 to the "ED SW Pulse" for triggering.
8) Turn the guide roller heads with a flat head (WH) driver to obtain a flat video RF envelope as shown in Fig. 2-16.
2-12
IDEAL ENVELOPE
S HEIGHT 100 HIGH SHEGHT TOO LOW THEIGHT TOO HIGH THEIGHT TOO LOW
GUIDE ROLLER S GUIDE ROLLER T
Fig. 2-16 Guide Roller S, T Height Adjustment
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