3
2.2 Back Light Is On (POWER-ON INDICATOR (Green) is blinking).
IC400
IC100
IC102
Video circuit may have any problem. Please check the parts below.
ASIC
MC
MC
ASIC
EEPROM (for adjustment)
MPU
IC606
IC400
P2.5V line may have any problem. Please check the parts below.
MAIN (Power)
ASIC
P2.5V generator- IC
ASIC
Q601
IC607
IC608
R614
R616
R619
IC610
IC605
5V line may have any problem. Please check the parts below.
MAIN (Power)
MAIN (Power)
MAIN (Power)
MAIN (Power)
MAIN (Power)
MAIN (Power)
MAIN (Power)
MAIN (Power)
DC 12V/5V convertor- Tr
DC 12V/5V convertor- IC
DC 12V/6V convertor- IC
5V OVP- precision resistor
5V OVP- precision resistor
5V OVP- precision resistor
P5V generator- IC
TM3.3V generator- IC
Q203
Q205
Q200
Q201
IC500
IC400
IC100
IC102
Video circuit may have any problem. Please check the parts below.
INPUT
INPUT
INPUT
INPUT
TMDS
ASIC
MC
MC
D-SUB-Tr
D-SUB-Tr
DVI-A-Tr
DVI-A-Tr
Digital signal receiver- IC
ASIC
EEPROM (for Adjustment)
MPU
Q600
IC102
Control circuit may have any problem. Please check the parts below.
MAIN (Power)
MC
PANEL 5V- ON/OFF- Tr
MPU
IC610
LCD panel
Please check the parts below.
MAIN (Power) PANEL 5V generator- IC
IC300
IC303
IC500
IC400
Sync. signal input circuit or ASIC may have any problem. Please
check the parts below.
Sync
Sync
TMDS
ASIC
DVI-A- IC
D-SUB- IC
Digital signal receiver- IC
ASIC
NO
YES
Does OSD
appear?
Is DC5V input
into #4 of
IC610?
Is DC5V
(PANEL 5V)
output from #1
of IC610?
Is Q600 on?
Panel 5V line may
have any problem.
NO
YES
YES
Is DC2.5V
(P2.5V) output
from #4 of
IC606?
NO
Is sync. Signal
input into each
pin of ASIC
IC400?
NO
NO
NO
YES
YES
YES
[Panel 5V Line Circuit]
Voltage
DC5V
Panel Circuit
-------
MAIN (ASIC)
PANEL 5V Line Circuit/Schematic Diagram
[Panel 2.5V Line Circuit]
Voltage
DC2.5V
ASIC
-------
MAIN (ASIC)
P2.5V Line Circuit/Schematic Diagram
[Pin no.(#) of ASIC IC400 to which sync. signal is to be input]
DVI-A
DVI-I
D-SUB
Hs
Vs
Hs
Vs
Hs
Vs
Pin no.(#)
148
149
155
154
146
147
Input Connector
Summary of Contents for LCD1550X-BK
Page 88: ...SCHEMATIC DIAGRAM POWER LCD1550X Normal Power Save 1ch Pin 4 2ch Pin 1 3ch Pin 2 4ch Pin 5 ...
Page 89: ...SCHEMATIC DIAGRAM PWB MAIN POWER LCD1550X ...
Page 90: ...SCHEMATIC DIAGRAM PWB MAIN INPUT LCD1550X ...
Page 91: ...SCHEMATIC DIAGRAM PWB MAIN SYNC LCD1550X ...
Page 92: ...SCHEMATIC DIAGRAM PWB MAIN TMDS LCD1550X ...
Page 96: ...SCHEMATIC DIAGRAM PWB MAIN ASIC LCD1550X ...
Page 97: ...SCHEMATIC DIAGRAM INVERTER LCD1550X 1ch Q701 B 2ch Q702 B ...
Page 98: ...SCHEMATIC DIAGRAM PWB SW LCD1550X ...
Page 100: ...SCHEMATIC DIAGRAM POWER LCD1550X ...
Page 101: ...SCHEMATIC DIAGRAM PWB MAIN POWER LCD1550X ...
Page 102: ...SCHEMATIC DIAGRAM PWB MAIN INPUT LCD1550X ...
Page 103: ...SCHEMATIC DIAGRAM PWB MAIN SYNC LCD1550X ...
Page 104: ...SCHEMATIC DIAGRAM PWB MAIN TMDS LCD1550X ...
Page 105: ...SCHEMATIC DIAGRAM PWB MAIN MC LCD1550X ...
Page 106: ...SCHEMATIC DIAGRAM PWB MAIN ASIC LCD1550X ...
Page 107: ...SCHEMATIC DIAGRAM INVERTER LCD1550X ...
Page 108: ...SCHEMATIC DIAGRAM PWB SW LCD1550X ...
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