Kortek corporation
68
of
99
PDP R&D Center
10.2.3 No Video (The 3
th
type)
(Operating Voltages exist, but an Image doesn’t exist on Video)
[ Logic MAIN ]
LED(LD2000) blinks?
(action of Sync signal)
①
Logic
MAIN
Check SMPS output(5Vdc).
Check connector-contact, pin-
reverse, insert missing, fault insert
Check the Fuse(FU2021,2002)
→Replace the fuse
Adjust the Keyscan Table.
After select 2E00(internal)/
2E01(External ), Check 2081
address’
s pattern.
After check 3th(5V)-input,
check 2th-pin and replace it.
②
Logic
MAIN
③
Logic
MAIN
Check LD1 / 4Pin connector
(5Vdc), the fuse
Check the Keyscan Table.
Check whether select-connector
is the 2E00(internal) or
2E01(external)
Check Regulator IC-output
IC2031(3.3Vdc)
IC2030(2.5Vdc)
NG
OK
NG
NG
NG
OK
NG
④
Logic
MAIN
⑤
Logic
MAIN
⑥
Logic
MAIN
Logic MAIN
O.K
Check Oscilator output
X2000(60MHz) 3th pin
X2001(40MHz) 3th pin
X2002(28.636MHz) 3th pin
Check Generator output (F1, F2,
256K)
Check IC2004 Reset(58th)-pin)
(Vss(typical=3.3V))
OK
Check input(3.3V)
Replace the fault-
Oscilator
Replace the
fault-parts of
F1,F2,256K
Check input volt(3.3Vdc)
Check compenents
Open/Short
Coil 10uH
Check the running
IC2037/ 2th output-pin.
Check the running &
pattern.
Replace the fault-coil
NG
NG
NG
NG
OK
OK
OK
☞ In checking input or output pins,
Check “
No solder/Cold solder/Lead bent”
on Connector Leads
Содержание P42SV
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