S-Vhs Deviation Adjustment (For Ag-7350); Ynr Balance Adjustment (For Ag-7350); Ynr Balance Adjustment (For Ag-7150) - Panasonic AG-7350 Series Service Manual

5-3-16. S-VHS DEVIATION ADJUSTMENT
(FOR AG-7350)
TP ADJ. MODE INPUT
TP3003 VR3003
PAL S-VHS
COLOUR BAR
RECORDING
TAPE M. EQ. SPEC.
S-VHS OSCILLO- INNERBEAT IS MINIMUM
BLANK TAPE SCOPE AS POSSIBLE
Note: This adjustment should be a I ways completed
after completing the VHS Deviation
adjustment.
1. Set the unit in the S-VHS mode.
2. Supply a colour bar signal to the video input
on the rear panel.
3. Connect the signal generator (Sine wave ) to
TP3006 and set the frequency and output level
as follows.
Frequency : 5.4MHz+/-0.05MHz
Output : 50mVp-p - 1 OOmVp-p
4. Connect the asci lloscope to TP3006.
5. Place the unit in the recording mode.
6. Adjust VR3003 so that the inner beat at white
portion of the colour bar becomes minimum as
possible as shown in Figure E13.
TP3006
V SYNC
PORTION
WHITE PORTION
I
I<
~1
1111111111Cb}
MINIMUM BEAT (INNER)
Figure E 13
5-3-17. YNR BALANCE ADJUSTMENT
(FOR AG-7350)
TP ADJ. MODE INPUT
TP8003
VR8003
PAL
COLOUR BAR
STOP
TAPE
M. EQ. SPEC.
BLANK
OSCILLO-
LESS THAN 50 mVp-p
TAPE
SCOPE
1. Supply a colour bar signa I to the video input
on the rear panel.
2. Connect the oscilloscope to TP8003.
3. Adjust VR8003 so that the waveform becomes
minimum as possible (less than 50mVp-p) as
shown in Figure E14.
TP8003
1-
LESS THAN 50mVp-p
H
Figure E 14
I
It
-I
5-3-18 Y N R BALANCE ADJUSTMENT
(FOR AG-7150)
TP ADJ. MODE INPUT
TP8003 VR8003
PAL
X
PLAY
TAPE M. EQ. SPEC.
COLOUR BAR
OSCILLO-
RECORDED
SCOPE
LESS THAN 50 mVp-p
S-VHS TAPE
1. Prepare the prerecorded S-VHS tape which
recorded a colour bar on another recorder such
as AG-7350.
2. Play back the colour bar signal.
3. Connect the asci lloscope to T P8003.
4. Adjust VR8003 so that the carrier leakage
IS
minimized (less than 50mVp-p) as shown in
Figure E 15.
TP8003
LESS THAN 50mVp-p
--t-1
--t---+--+----t----t-----+--11------*1+
1.
H
.1
Figure E 15
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