Kortek corporation
76
of
99
PDP R&D Center
10.6 Abnormal Sustain
(Abnormal condition on horizontal lines)
(except abnormality of Sustain Open or short))
[ Y-Buffer ]
Abnormal
Sustain output
① Y-Buffer
② Y-Buffer
③ Y-Buffer
Check Logic Signal input of
Scan Driver IC/100pin
Upper(IC5401,5402,5403,5404)
Lower(IC5501,5502,5503,5504)
CN5406,5506(13pin)
Check logic signal input of
STV7617
NG
NG
Check CON(80pin)-Output WAVE
(CN5401,5402,5403,5501,5502,
5503)
NG
Check Scan Driver IC/100pin-output
Upper(IC5401,5402,5403,5404)
Lower(IC5501,5502,5503,5504)
OK
Repair/Replace the IC
NG
Y-MAIN
Y-MAIN
Y-MAIN
OK
OK
Check output(2,4,6,10,12)pins
of the IC5005/7404
Check output(3,5,7,9,12,14,16,18)pins
of the IC5005,5007/LV244A
Check input(2,4,5,8,9,12)pin
of the CN5002/CON_30pin
After check
coldsoldering &
Pin-shorting,
Replace the IC
NG
NG
NG
Refer to
Sustain Open
Block Diagram
After check
coldsoldering &
Pin-shorting,
Replace the IC
The Method to detect fault-IC: Separate IC
outputpin-Lead from PCB PAD
And so After check output-pin, replace IC.
☞ In checking input or output pins,
Check “
No solder/Cold solder/Lead bent” on Connector Leads
Содержание P42SV
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