Panasonic AG-DV2500E, Service Manual

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3-2
3.1.4 Notes for adjustments
Since the AG-DV2500 is compatible with the recording and play-
back of the NTSC and PAL signals, it is required that both NTSC
and PAL be adjusted.
The NTSC and PAL signals use different Y signal V/S ratios and color
levels. Be sure to use the specified signals for the adjustments.
Both the NTSC and PAL signals use a variety of signals differing in
the Y levels and color levels, etc. Also note that the NTSC signals
include signals both with and without the Setup component.
The AG-DV2500 is provided with input and output level adjust-
ment capabilities only. If a signal of the specified level for color
and setup is not available, read the following for the substitu-
tion.
(1) Y level adjustments (Both of NTSC and PAL)
If the available Y signal contains a white level of 100 IRE
(PAL: 0.7 Vp-p), the signal can be used in the adjustment as
described in the given procedure.
If the input signal has the setup, adjust the luminance level
from the pedestal to the white peak including the setup.
(2) Setup level adjustment (NTSC only)
The NTSC signal generator usually generates a signal with
the Setup component. If it cannot be switched off, follow
the alternative adjustment procedure for the signal with
Setup, which is provided for each adjustment item.
(3) Color level adjustments (Both of NTSC and PAL)
The chroma level is variable depending on whether it is 75%
or 100% and on whether the Setup component is present
(NTSC only). As a result, a correct adjustment is not possi-
ble unless the specified signal is used. If the specified signal
is not available, refer to the following.
• Chroma level adjustment
First measure the input signal what the signal type is (Refer
to the table 3.1.4). Then apply the signal (composite or Y/C)
to the AG-DV2500 and adjust the output signal level equal to
the input type level.
• Burst level adjustment
The burst level is identical for all signals. There will be no
problem if it can be adjusted to NTSC: 0.286 Vp-p (PAL:
0.3 Vp-p). There is no problem whether or not the Setup
component is present (NTSC only).
3.1.5 Adjustment menu
(1) Operation method
Use the ADJUST MENU for adjustments. The operating method
is as follows.
1
Make sure of no cassette in the VTR. While holding the [REW]
and [FF] buttons, press the [OPERATE] button to turn the
unit on.
When the unit is turned on, press and hold the [EJECT] but-
ton for about 2 seconds until the ADJUST MENU is displayed.
Press the [SET] (PAUSE) button so that the "*" marking blinks
and, while observing the specified TP, the measuring instru-
ment and others, press the
(PLAY) button or (STOP)
button to adjust the value to the specified value.
(Pressing the [A.DUB] button simultaneously with the
or
button varies the adjustment value by 10 steps.)
Potentiometer value
D/A output value
Adjusting marking
– – – A D J U S T M E N U – – –
1 0 6 . M E S P V C O
*
V R D A T A : 0 8 D F H
C T L D A T A : 0 8 D F H
S E T D A T A : 0 8 D F H
C H 1 6 5 5 3 5
C H 2 6 5 5 3 5
Currently set adjustment
value
Pressing the [SET] button causes the value being adjusted
with the potentiometer to be the adjustment value.
After completing the adjustment, press the [SET] (PAUSE)
button again to turn the "*" marking off and store the adjust-
ment value. (The adjustment value is not stored and movi-
ng to the next adjustment item can not be performed unle-
ss the [SET] (PAUSE) button is pressed.)
Press the (FF) or (REW) button to select the next ad-
justment item.
Press the (FF) or (REW) button to select adjustment
item.
Type
Y 100%, color 100%
level, setup 0%
Y 100%, color 100%
level, setup 7.5%
Y 100%, color 75%
level, setup 0%
Y 100%, color 75%
level, setup 7.5%
Y level
[mVp-p]
White
[mV]
Sync
[mV] Setup
[mV]
Burst
[mVp-p]
YL/B
[mVp-p]
CY/R
[mVp-p]
G/MG
[mVp-p]
[NTSC]
1000
1000
1000
1000
714
714
714
714
286
286
286
286
0
53.6
0
53.6
286
286
286
286
640
592
480
444
908
836
681
627
848
780
636
585
Notes:
• When the adjustment procedure requires a mode transi-
tion to PLAY, etc., use the accessory of wireless remote
controller.
• After completing all of the required settings, press [OPERA-
TE] button to turn off the power.
• To return to normal operating status, tur n the unit off then
on again. If this is not performed, since the unit is turned
on in the adjustment mode, pressing the MENU button dis-
plays an adjustment menu and it is not possible to display
the normal operation menu.
2
3
4
5
6