How To Read Adjustment Procedures; Standard Set-Up Condition; Servo Section; Pal Pg Shifter Adjustment - Panasonic AG-7350 Series Service Manual

5-3. ADJUSTMENT PROCEDURE
5-3-1. How to read the adjustment procedures
Connecting Point
Mode of VTR Example:
(Test Point) of
SELF RECORDING
Measuring
Record the Video Signal
Equipment
and Playback the
portion just recorded.
\ [Adjustment
/
component
y
TP ADJ. MODE INPUT
TP2010
R2002
PLAY
VIDEO
TP2002
SIGNAL
TAPE
M. EQ. SPEC.
ALIGNMENT
TAPE: OSCILLO·
0.4 ± 0.4 msec.
VFM8180HADH
SCOPE
PORTION: (l)
L
I
I
( Measuring
1
)
(Specification )
Equipment
for Adjustment
Using 1st portion of
(Supply a Video Signal
J
Alignment Tape for
to the VIDEO input or
adjustment
,s-VIDEO input
.I
Figure E 1
DELAY MODE
TP2010
I
I
-------4r-
T _____,
_T_P_20_0_2 ____________
~~
TP2010 (Trigger)
TP2002
Connecting
point of a
scope
Figure E2
Trigger
channel of
a scope
L
5-3-2. Standard set-up conditions
Unless otherwise specified, the selection switches
and on-screen mode should be set as the following
conditions.
Note : Unless otherwise specified, all adjustments
are effective for both AG-7350 and AG-7150.
1. Normai/Hi-Fi Audio Input level VRs (CH1/CH2)
00. Centre Fix position
2. S-VHS Select ON position (On-Screen
setting)
3. Tracking Control VR 000 Centre Fix position
4. Slow Tracking VR .00 Centre Fix position
5. Video Mode . 00 Auto mode (On-Screen setting)
6. Norm/Hi-Fi SW 000 Norm mode
7. Dolby NR
oo,
OFF mode (On-Screen setting)
8. TV System00.PAL position.
Note: Video signal should be supplied from the BNC
video input connector (not S-VIDEO input
connector), if there is not mention of
input in the INPUT column.
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SERVO SECTION
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5-3-3. PAL PG SHIFTER ADJUSTMENT
TP ADJ. MODE INPUT
TP2201 (H. SW)
VR2203
PAL
X
VIDEO OUT PLAY
TAPE M. EQ. SPEC.
VFM8180HADH OSCILLO-
6.5H±0.5H
PORTION:
2
SCOPE
Note: Tape interchangeability adjustment should be
always completed before this adjustment.
1. Set the TV system switch to the PAL position.
2. Play back the PAL alignment tape at the
portion 2.
3. Connect the oscilloscope to the video output
for CH-1 and TP2201 for CH-2.
4. Adjust VR2203 for 6.5H +/-0.5H as shown in
Figure E3.
TP2201
(HSW)
VIDEO
OUT
- - , ...... t------6.5 ± 0.5 H _ _ _
____,~
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Figu re E3.
5. Change the triggering slope of the
oscilloscope form "-" to "+" side, and confirm
that the difference between the rising and
falling edges become less than 20 usee.
5-5