5-2
VPH-G90E/G90U/G90M
5-2. BA BOARD ADJUSTMENT
5-2-1. Picture Control Adjustment
1. Connect an oscilloscope to TP1612 of the BA board.
2. Connect a communication controller to the RS-422A
connector of the YA board.
Note:
Be sure to set this unit and the
communication controller to the same baud
rate.
3. Turn the power on.
4. Input the NTSC 100 % color bars signal.
5. Change the PICTURE (SUB PICTURE) data of
CXA2101Q (IC1600) with a communication controller.
Set the level “A (from the pedestal to 100 IRE)” so that
it is closest value to 0.700 Vp-p.
6. Change the BRIGHT (SUB BRIGHT) data of
CXA2101Q (IC1600) with a communication controller.
Set the level “B” so that it is closest value to zero volt.
7. Input the NTSC 75 % color bars signal.
8. Change the SUB-COL (NT3.58EXB OFF) data and
SUB-HUE (NT3.58) data of CXA2101Q (IC1600) with
a communication controller. Set the levels “A, B, C,
and D” so that they are visibly equal in amplitude.
9. Input the SUB-COL (NT3.58EXB OFF) data adjusted
in step 8 to SUB-COL (NT3.58EXB ON).
10. Input the PAL 75% color bars signal.
11. Change the SUB-COL (PALEXB OFF) data and SUB-
HUE (PAL) data of CXA2101Q (IC1600) with a
communication controller. Set the levels “A, B, C, and
D” so that they are visibly equal in amplitude.
12. Input the same data as SUB-COL (PAL EXB OFF)
adjusted in step 11 to SUB-COL (SECAM EXB OFF),
SUB-COL (NT4.43EXB OFF), SUB-COL (PAL-M
EXB OFF), SUB-COL (PAL EXB ON), SUB-COL
(SECAM EXB ON), SUB-COL (NT4.43 EXB ON),
and SUB-COL (PAL-M EXB ON).
A
B
C
D
B
A
A
Specification: Amplitude A = 2.0
±
0.03 V
RV502(R)
RV503(G)
RV504(B)
RV501
Note: Adjust the sync level so that it becomes the same
level as pedestal level. If the sync level fluctuates,
stop RV501 where it is stable position.
13. Input the same data as SUB-HUE (PAL) adjusted in
step 11 to SUB-HUE (SECAM), SUB-HUE (4.43),
SUB-HUE (PAL-M), SUB-HUE (RGB), SUB-HUE
(15kRGB), SUB-HUE (YPbPr), SUB-HUE (RGB), and
SUB-HUE (IDTV).
14. Press the MEMORY key.
5-2-2. Signal Level Adjustment
1. Input the 10-STEP signal to VIDEO IN.
2. Set the CONTR and GAIN of each color to maximum
position.
3. Connect 75
Z
resistor between pin-A/B/C16 (RED
OUT) of connector CN341 on the BA board to ground.
Connect 75
Z
resistors between pin-A/B/C18 (GREEN
OUT) and ground, and pin-A/B/C20 (BLUE OUT) and
ground of connector CN341 on the BA board toground.
4. Short-circuit between pin-B26 (ABL) of CN 340 on the
BA board and ground.
5. Adjust RV502 (R), RV503 (G), and RV504 (B) on the
BA board in sequence so that the amplitude of R, G,
and B levels become 2
±
0.05 V.
6. Adjust RV501 on the BA board so that the sync level
of GREEN OUT signal becomes the same level
aspedestal level. Check to see that the sync levels of
RED OUT and BLUE OUT signals are within the
pedestal level.
Summary of Contents for VPH-G90E
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Page 122: ...2 2 VPH G90E G90U G90M 2 1 3 Location 3 ME MB MC PB M L MA BA F BC NA BB ...
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Page 337: ...9 1 9 1 VPH G90E G90U G90M SECTION 9 BLOCK DIAGRAMS ...
Page 363: ...2 3 4 5 A B C D E F G H 1 10 1 10 1 VPH G90J G90E G90U G90M SECTION 10 DIAGRAMS ...
Page 437: ...2 3 4 5 A B C D E F G H 1 10 75 10 75 VPH G90J G90E G90U G90M ...
Page 474: ...2 3 4 5 A B C D E F G H 1 10 112 10 112 VPH G90J G90E G90U G90M ...