3
VPH-G90E/G90U/G90M
5.
CIRCUIT ADJUSTMENTS
5-1. POWER BLOCK ........................................................................................... 5-1
5-1-1.
DC (
+
) Adjustment ................................................................................ 5-1
5-1-2.
+
115 V Adjustment ................................................................................ 5-1
5-1-3.
+
200 V Adjustment ................................................................................ 5-1
5-1-4.
Oscillating Frequency Adjustment ......................................................... 5-1
5-2. BA BOARD ADJUSTMENT ........................................................................ 5-2
5-2-1.
Picture Control Adjustment .................................................................... 5-2
5-2-2.
Signal Level Adjustment ........................................................................ 5-2
5-2-3.
Analog Test Signal Amplitude Adjustment ........................................... 5-3
5-2-4.
ABL Adjustment .................................................................................... 5-3
5-3. CAR/CAG/CAB BOARDS ADJUSTMENT ................................................ 5-3
5-3-1.
Preparation Before Adjustments ............................................................. 5-3
5-3-2.
Pedestal Level Adjustment ..................................................................... 5-3
5-3-3.
CRT Protector Adjustment ..................................................................... 5-3
5-3-4.
Cathode Level Adjustment ..................................................................... 5-4
5-3-5.
G1 Level Adjustment ............................................................................. 5-4
5-3-6.
VPS Limiter Adjustment ........................................................................ 5-5
5-4. DA/DB/DD BOARDS ADJUSTMENTS ...................................................... 5-5
5-4-1.
F/V Voltage Adjustment (DA Board) .................................................... 5-5
5-4-2.
AFC Adjustment (DA Board) ................................................................ 5-5
5-4-3.
V Hold Adjustment (DA Board) ............................................................ 5-5
5-4-4.
H Parabola Waveform Adjustment (DA Board) .................................... 5-6
5-4-5.
H SIN Adjustment (DA Board) .............................................................. 5-6
5-4-6.
H SIN
x
VP Waveform Adjustment (DB Board) .................................. 5-6
5-4-7.
H SIN
x
V SIN Waveform Adjustment (DB Board) ............................. 5-7
5-4-8.
HS
x
VS Waveform Adjustment (DB Board) ....................................... 5-7
5-4-9.
HP
x
V SIN Waveform Adjustment (DB Board) .................................. 5-7
5-4-10. 1/2 SIN1 Waveform Adjustment (DB Board) ........................................ 5-7
5-4-11. 1/2 SIN2 Waveform Adjustment (DB Board) ........................................ 5-7
5-4-12. HS
x
VS Waveform Adjustment (DB Board) ....................................... 5-8
5-4-13. HP
x
VS Waveform Adjustment (DB Board) ....................................... 5-8
5-4-14. B KEY Waveform Adjustment (DB Board) .......................................... 5-8
5-4-15. T KEY Waveform Adjustment (DB Board) ........................................... 5-8
5-4-16. 1/2H Switching Waveform Adjustment (DA/DB Boards) ..................... 5-8
5-4-17. D/A Converter Offset Adjustment (DD Board) ..................................... 5-8
5-5. VCO OFFSET/LIMITER ADJUSTMENT .................................................... 5-9
5-6. YA BOARD REPLACEMENT ..................................................................... 5-9
5-6-1.
Replacement Procedure .......................................................................... 5-9
5-6-2.
Uploading Program (Emergency Mode) .............................................. 5-10
5-6-3.
Creating Factory Data ........................................................................... 5-10
5-6-4.
Creating Service Data ........................................................................... 5-11
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 ...