2
MPU may have any problem.
NO
NO
NO
YES
Is control
pulse for
brightness of
back light
input into #7 of
J703?
Is DC2.5V (D2.5V)
output from #8 of
IC602?
ASIC may have any problem.
YES
YES
Is approx. 3.3V
input #5 of J703?
IC602
IC400
D2.5V line may have any problem. Please check the parts
below.
MAIN (Power)
ASIC
D2.5V- generator- IC
ASIC
Please check the part below.
MPU
IC102
MC
Please check the part below.
ASIC
IC400
ASIC
LCD panel
(back light)
Q701
Q702
Q703
Q704
T701
T702
Q707
D707
D717
D718
D719
D720
IC701
IC702
Q717
Q718
Q711
TH701
IC102
Protection circuit in inverter circuit may have any problem.
Please check the parts below.
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
MC
Output- Tr
Output- Tr
Output- Tr
Output- Tr
Output- trans
Output- trans
12V-OVP- Tr
12V-OVP- zener diode
Output- F/B- zener diode
Output- F/B- zener diode
Output- F/B- zener diode
Output- F/B- zener diode
Output- F/B- IC
Output- F/B- IC
Abnormal detector- Tr
Abnormal detector- Tr
Abnormal detector- Tr
Abnormal detector- thyristor
MPU
LCD panel
(back light)
F701
F702
Q701
Q702
Q703
Q704
T701
T702
IC703
Inverter drive circuit may have any problem. Please check the
parts below.
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
OCP- fuse
OCP- fuse
Output- Tr
Output- Tr
Output- Tr
Output- Tr
Output- trans
Output- trans
Power output- IC
ASIC
----------
MAIN (ASIC)
DC2.5V
Voltage
D2.5V Line Circuit/Schematic Diagram
2. No Picture
2.1 Back Light Does Not Turn On (POWER-ON INDICATOR (Green) Is Blinking)
[D2.5V Line Circuit]
Содержание LCD1550X-BK
Страница 82: ...3 TROUBLE SHOOTING Contents No Power No Picture Abnormal Picture or Ineffective Adjustment 1 2 3 Page 1 2 4 ...
Страница 88: ...SCHEMATIC DIAGRAM POWER LCD1550X Normal Power Save 1ch Pin 4 2ch Pin 1 3ch Pin 2 4ch Pin 5 ...
Страница 89: ...SCHEMATIC DIAGRAM PWB MAIN POWER LCD1550X ...
Страница 90: ...SCHEMATIC DIAGRAM PWB MAIN INPUT LCD1550X ...
Страница 91: ...SCHEMATIC DIAGRAM PWB MAIN SYNC LCD1550X ...
Страница 92: ...SCHEMATIC DIAGRAM PWB MAIN TMDS LCD1550X ...
Страница 96: ...SCHEMATIC DIAGRAM PWB MAIN ASIC LCD1550X ...
Страница 97: ...SCHEMATIC DIAGRAM INVERTER LCD1550X 1ch Q701 B 2ch Q702 B ...
Страница 98: ...SCHEMATIC DIAGRAM PWB SW LCD1550X ...
Страница 100: ...SCHEMATIC DIAGRAM POWER LCD1550X ...
Страница 101: ...SCHEMATIC DIAGRAM PWB MAIN POWER LCD1550X ...
Страница 102: ...SCHEMATIC DIAGRAM PWB MAIN INPUT LCD1550X ...
Страница 103: ...SCHEMATIC DIAGRAM PWB MAIN SYNC LCD1550X ...
Страница 104: ...SCHEMATIC DIAGRAM PWB MAIN TMDS LCD1550X ...
Страница 105: ...SCHEMATIC DIAGRAM PWB MAIN MC LCD1550X ...
Страница 106: ...SCHEMATIC DIAGRAM PWB MAIN ASIC LCD1550X ...
Страница 107: ...SCHEMATIC DIAGRAM INVERTER LCD1550X ...
Страница 108: ...SCHEMATIC DIAGRAM PWB SW LCD1550X ...
Страница 127: ... 16 Document No VSPF A028 Bave Average brightness of 1 to 9 10 50 90 90 10 50 5 1 2 3 6 9 8 7 4 ...
Страница 152: ...LCD1550X BROCHURE LiquidView SCALE NTS DIMENSION IN mm Fig 11A FRONT REAR FINAL CONDITION 420 297 ...
Страница 155: ......
Страница 156: ......
Страница 157: ......
Страница 158: ......
Страница 159: ......
Страница 160: ......
Страница 161: ......
Страница 162: ......
Страница 163: ......
Страница 164: ......
Страница 165: ......
Страница 166: ......
Страница 167: ......
Страница 168: ......
Страница 169: ......
Страница 170: ......
Страница 171: ......
Страница 172: ......
Страница 173: ......
Страница 174: ......
Страница 175: ......
Страница 176: ......
Страница 177: ......
Страница 178: ......
Страница 179: ......