Panasonic DMR-EZ49VEG Service Manual page 50

*Note4:
X-VALUE & LINEARITY (P2 and P3 Posts) Adjustment Procedure
1. Set the Auto Tracking to off.
(1) Set Drive Select to VHS and press the [STOP] and [EJECT] keys simultaneously for more than 3 seconds to enter Service
Mode.
(2) Press [STOP] and [EJECT] keys simultaneously twice to activate Service Mode 2, and then Auto-Tracking is turned off.
2. Perform the X-VALUE ADJUSTMENT
X-VALUE ADJUSTMENT
(1) After turning off the Auto tracking, playback the alignment Tape and press [CH UP] and [CH DOWN] keys simultaneously
to adjust the tracing to FIX value.
(2) Adjust A/C Head Base so that the envelope becomes maximum level.
(It is described on "5-2. Tape Interchangeability in "R4 Mechanism" that is separated volume.)
Alignment Tape
Test Point of Playback Envelope
LINEARITY ADJUSTMENT
(1) After turning off the Auto tracking, playback the alignment Tape and press [CH UP] and [CH DOWN] keys simultaneously
to adjust the tracing to FIX value.
(2) Adjust the LINEARITY so that the envelope is flat when moving tracking to (+) and (-) directions.
Alignment Tape
Test Point of Playback Envelope
l Main symptoms and Adjustment point
Envelope
TW3001 (or TW4502)
TW3001 (or TW4502)
Post Name
P2 Post
P2 Post
P3 Post
P3 Post
P2 Post P3 Post
50
VFM8125H3F
VFM8125H3F
Adjustment Method
Turn P2 Post counter-clockwise
(Approx. 1/2 revolution)
Turn P2 Post clockwise
(Approx. 1/4 revolution)
Turn P3 Post clockwise
(Approx. 1/2 revolution)
Turn P3 Post counter-clockwise
(Approx. 1/4 revolution)
Turn P2 Post clockwise
(Less than 1 revolution)
Turn P3 Post counter-clockwise
(Less than 1 revolution)