Kortek corporation
82
of
99
PDP R&D Center
10.7.4 Block Address Open (Block Vertical lines don’t exist on Video)
Check pin Open/Short → Replace the IC
F - B U F
F E 1
E F 1
I C 2 6 0 1 ( O u t p u t )
IC2601(Input)
E L 2
E C 1 _ B lock
E C 2 _ B lock
E C 3 _ B lock
E C 4 _ B lock
E C 5 _ B lock
E C 6 _ B lock
E C 7 _ B lock
4 6
35
Control_Data(POL)-Check connector(80pin)/IC pin
14
6
4 6
Logic Buffer "E"
18
2
16
4
F - B U F
F E 1
E F 1
IC2604(Output)
IC2604(Input)
E L 1
E C 1 _ B lock
E C 2 _ B lock
E C 3 _ B lock
E C 4 _ B lock
E C 5 _ B lock
E C 6 _ B lock
E C 7 _ B lock
32
49
Control_Data(CLK)-Check connector(80pin)/IC pin
14
6
46
Logic Buffer "E"
18
2
16
4
NG
OK
OK
NG
Check pin Open/Short
→ Replace the IC
[ COF ]
Address Open
① Logic
Buffer
Check Va-output voltages(75Vdc)
(9,10,35,36,45,46,71,72pin) of the
COF CON/80pin
② Logic
Buffer
③ Logic
Buffer
Check output-signals(18,3pin) of
the VHCT244(IC2602,03,08,
05,07,06,09,00. IC2700,01,05,
02,04,03)
Check ouput-signals(19,20,24~27,
31,32,55,56,60~63,67,68pin) of
the COF CON/80pin
OK
NG
NG
NG
Refer to
the table
NG
Logic Buffer
OK
OK
Logic Buffer
Logic Buffer
Logic
Buffer
OK
OK
Check SMPS
output-voltage.
Check Protection.
Check that wether
the logic buffer-
filtercap is reverse
or not
NG
NG
Check Va_input-voltage
of Logic F-Buffer/LP1-CON
Check current-resistor(2.2Ω) of
Logic Buffer.
Check that whether resistor is short or not
Check that whether Logic-Buffer/
3Pin-Con-Wire is reverse or not.
Check contact of that.
Replace
the
Resistor
NG
OK
COF Fault-Module⋯
Replace
Check each input-signals(2,17pin)
of the VHCT244
After check
coldsoldering &
Pin-shorting,
Replace the IC
After check Pin-shorting,
coldsoldering & Pin-opening,
Check contact and aligned state
of COF connector
After check Pin-shorting,
coldsoldering & Pin-opening,
Check contact and aligned state
of COF connector
☞ In checking input or output pins,
Check “
No solder/Cold solder/Lead bent” on Connector Leads
Содержание P42SV
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