Samsung TB331VDZ1S/XSA, Service Manual

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Alignments and Adjustments (Mechanical)
Samsung Electronics 4-69
4-7-3 Check Transitional Operation from RPS to Play
Check transition from RPS mode to play mode : Using a pre-recorded SP tape, make sure the entry side of
envelope comes to an appropriate steady state within 3 seconds (as shown in Fig. 4-68). If the envelope
waveform does not reach specified peak-to peak amplitude within 3 seconds, adjust as follows :
1. Make sure there is no gap between the supply roller lower flange and the tape.
If there is a gap, adjust the supply guide roller again.
2. Change operation mode from the RPS to the play mode (again) and make sure the entry side of envelope
rises within 3 second.
ENTRANCE SIDE
ENVELOPE
Fig. 4-68 Video Envelope Rising when Operation mode Changes from RPS to Play Mode
4-7-4 Envelope Check
1. Make recordings on T-120 (E-120) and T-160 (E-180) tape. Make sure the playback output envelope meets
the specification as shown in Fig. 4-69.
2. Play back a self recorded tape (recording made on the unit using with T-120, E-120). The video envelope
should meet the specification as shown in Fig. 4-69. In SP mode, (A) should equal (B). If the head gap is
wide, upper cylinder should be checked.
A
B
Fig. 4-69 Envelope Output and Output Level