Audio/Control (A/C) Head Adjustment; Prior Adjustment - Philips DVP3350V/01 Service Manual

DECK MECHANISM ADJUSTMENT

5. Audio/Control (A/C) Head Adjustment

Purpose of adjustment : To ensure that audio and control signals can be recorded and
5-1. Prior Adjustment (performed only when no audio output appears in play of the standard test tape)
Fixtures and tools used
• Blank Tape
(Empty Tape)
• Driver (+) Type ø 5
Adjustment Procedure/Adjustment Diagrams
1) Basically use the A/C head assembly adjusted as in
SPEC.
2) Check if there is crumpling and folding of the tape
around the A/C head. If it is, Turn and adjust the tilt
adjusting screw to ensure that the tape corresponds to
the bottom guide of the P4, and recheck the tape path
after proceeding play for 4-5 seconds.
Fig. C-5-1
X-Value Adjustment
Hole
Fixed Screw
Azimuth
Adjustment
Screw(A)
A/C Head Assembly
Fig. C-5-2
played correctly by constantly maintaining distance between
tape and head, and tape tension between the P3
post and the P4 post.
VCR (VCP) status
• Play the blank tape
(empty tape).
A/C Head Base
Tilt Adjustment
Screw(C)
Height Adjustment
Screw(B)
Adjustment position
• Tilt adjusting screw (C)
• Height adjusting screw (B)
• Azimuth adjusting screw (A)
3) Where the tape bottom is not equal to Fig. C-5-3, Adjust
the height by using the height adjusting screw (B) and
then readjust it by using the tilt adjusting screw (C).
CAUTIONS
Always check the height of the A/C head since the most
ideal height of the A/C head can be obtained when the
bottom part of the tape is away 0.2 ~ 0.25mm from the
bottom part of the A/C head.
A/C Head
4-17
Tape
P4
Tape
0.2~0.25mm
Fig. C-5-3