Vhs Y Playback Level Adjustment (For Ag-7150); Y Playback Level Adjustment (For Ag-7350); Y Playback Level Adjustment (For Ag-7150); Playback Sub Emphasis Input Level Adjustment - Panasonic AG-7350 Series Service Manual

5-3-22. VHS Y PLAYBACK LEVEL ADJUSTMENT
(FOR AG-7150)
TP ADJ. MODE INPUT
VIDEO
VR3503
PALVHS
X
OUTPUT 1 PLAY
TAPE M. EQ. SPEC.
COLOUR BAR
OSCILLO-
RECORDED
SCOPE
1.0Vp-p±0.02V
TAPE
1. Prepare the normal VHS prerecorded tape which
recorded a colour bar signal on another set
such as AG-7350.
2. Connect the asci lloscope to the video output
with 75ohm termination.
3. Play back the colour bar signal.
4. Adjust VR3502 for 1.0 +/- 0.02Vp-p as shown 1n
Figure E20.
VIDEO OUT 1
(H. RATE)
-----
---~
1.0Vp-p±0.02V
-__ l
with 750 Termination
Figure E20
5-3-23. Y PLAYBACK LEVEL ADJUSTMENT
(FOR AG-7350)
TP ADJ. MODE INPUT
VIDEO OUT 1 VR8010
PAL
COLOUR BAR
PLAY
TAPE M. EQ. SPEC.
SELF
OSCILLO·
RECORDED
SCOPE
1.0Vp-p ±0.02V
TAPE
Note: This adjustment should be always completed
after the VHS Y playback level adjustment.
1. Supply a colour bar signal to the video input
and record it for a few minute.
2. Play back the just recorded portion.
3. Connect the asci lloscope to the video out
connector with a 75 ohm termination.
4. Adjust VR801 0 for 1.0 +/-0.02Vp-p as shown 1n
Figure E21.
VIDEO OUT 1
(H. RATE)
-------1
1.0Vp-p±0.02V
__ _l
with 750 Termination
Figure E21
5-3-24. Y PLAYBACK LEVEL ADJUSTMENT
(FOR AG-7150)
TP ADJ. MODE INPUT
VIDEO OUT 1 VR8010
PAL
X
PLAY
TAPE M. EQ.
SPEC.
COROUR BAR
OSCILLO-
RECORDED
SCOPE
1.0Vp-p ±0.02V
TAPE
Note: This adjustment should be always completed
after the VHS Y playback level adjustment.
1. Prepare the prerecorded tape which recorded
a colour bar on another recorder (AG-7350).
2. Play back the colour bar signal.
3. Connect the oscilloscope to the video output 1
connector with 75ohm termination.
4. Adjust VR8010 for 1.0Vp-p +/-0.02Vp-p as shown
in Figure E22.
VIDEO OUT 1
(H. RATE)
with 750 Termination
Figure E22
5-3-25. PLAYBACK SUB EMPHASIS INPUT LEVEL
ADJUSTMENT (FOR AG-7350)
TP ADJ. MODE
INPUT
TP3005 VR3001
PAL
COLOUR BAR
PLAY
TAPE M. EQ. SPEC.
SELF
OSCILLO-
RECORDED
SCOPE
400mVp-p±10mV
TAPE
Note: This adjustment should be always completed
after completion of all adjustments on the
recording loop.
1. Supply a colour bar signal to the video input
and record it for a few minute.
2. Play back the just recorded portion.
3. Connect the asci lloscope to TP3005.
4. Adjust VR3001 for 400 +/-1 OmVp-p as shown in
Figure E23.
TP3005
(H. RATE)
5-11
- - - - -
-
--~
400mVp-p ± 10mV
-__ l
Figure E23
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