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EN 19, LGE PDP 2K6

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Service Modes, Error Codes, and Fault Finding LGE PDP 2K6 5. EN 19 5.2.2 Display Defects Half of the Screen is Not Shown • On the XR board: 1. Check if the power connector of the XR board is plugged in correctly. 2. Check if the 60-pin connection of the CTRL board to the XR board is plugged in correctly. • On the XL board: 1. Check if the power connector of the XL board is plugged in correctly. 2. Check if the 60-pin connection of the CTRL board to the XL board is plugged in correctly. • Replace relevant X board. Notes: Relationship between Screen and X board: Screen Left half of the screen Right half of the screen X-board Right X-board Left X-board Left half of the screen Right half of the screen Image No image G_16390_044.eps 110806 Figure 5-24 Screen display "1/2 display" Vertical Parts of the Screen are Missing 1. This can be related to a problem between the Data TCP and the X board. 2. Verify that the connector of the Data TCP is well connected to the X board (it corresponds to the part of the screen that does not display the image). 3. Confirm whether the Data TCP fails (examination with the naked eye of blown ICs or other parts included). - If an IC is damaged: replace the panel. - In case of an X board short circuit or an open PWB pattern: when the TCP IC is not defective, replace the X board. Notes: • Example of screen display (any of the Data TCPs can be shown). - Examine with the naked eye traces of blown ICs [3] or other parts. G_16390_081.eps 010906 Figure 5-26 Data TCP IC examination Unusual Pattern on Display 1. In case of generation of an unusual pattern of the Data TCP IC unit as shown in the picture below, check the fixation of the relevant X board. If that doesn't help, replace the X board. 2. In case of "Case 1": - Check the connection between the Data TCP connector and the IC. - Replace the relevant X board, or the Control board. 3. In case of "Case 2" or "Case 3": - Check the connection between the CTRL board and the relevant X board. - Replace the relevant X board or the CTRL board. Note: • If the silicon tape between the X board and the heatsink feels (partially) hard, it has to be replaced. Case 1 Case 2 Case 3 All Partial Not at all F_15590_009.eps 040705 Figure 5-25 Screen display "Vertical parts missing" • How to examine the Data TCP IC - Connect [1] "Va Power" to the minus and [2] "GND" to the plus of an ohmmeter, and then examine the diode in forward or reverse direction. G_16390_045.eps 140806 Figure 5-27 Possible cases Scan FPC Problem 1. Check the connection between Y DRV board and Scan FPC. 2. If the Scan IC is defective, replace the Y DRV board.

Section	Page
Content	1
1. Technical Specifications, Connections, and Chassis Overview	2
1.1 Technical Specifications PDP42X3*	2
1.1.1 General Specification	2
Table 1-1 General Specifications	2
1.1.2 Definitions	2
Figure 1-1 Definition of module position	2
Figure 1-2 Identification label	2
Figure 1-3 Voltage label (on rear side of module)	2
Figure 1-4 Part number printing (on board)	3
Figure 1-5 Part number label (on board)	3
Figure 1-6 TCP serial number (on TCP)	3
1.1.3 Chassis Overview	4
Figure 1-7 PWB location	4
2. Safety Instructions, Warnings, and Notes	5
2.1 Warnings	5
3. Directions for Use	6
4. Mechanical Instructions	7
4.1 Mechanical Overviews	7
Figure 4-1 Cable dressing	7
Table 4-1 Cable function	7
Figure 4-2 Label location on PWB’s	8
Figure 4-3 Label indication	8
Figure 4-4 Label information (1)	9
Figure 4-5 Label information (2)	9
4.2 Panel/assy removal	9
4.2.1 Power Supply Unit	9
Figure 4-6 PSU removal	9
4.2.2 Control Board	9
Figure 4-7 Control board removal	9
4.2.3 Y Sustain Board	10
Figure 4-8 Y-SUS board removal	10
4.2.4 Y Driver Board	10
Figure 4-9 Y driver board removal	10
Figure 4-10 TCP Separation	10
4.2.5 Z-Sustain board	11
Figure 4-11 Z-SUS board removal	11
Figure 4-12 FPC removal	11
4.2.6 X-board	11
Figure 4-13 X board removal 1/2	11
Figure 4-14 X board removal 2/2	11
Figure 4-15 TCP Separation	11
5. Service Modes, Error Codes, and Fault Finding	12
5.1 Quick Module Check	12
Figure 5-1 Logical judgement	12
Figure 5-2 Quick check	12
5.1.1 No Display	13
Connectors	13
Figure 5-3 Control + Y-SUS board	13
Figure 5-4 Control + Z-SUS board	13
Figure 5-5 Control + X board	13
Figure 5-6 Signal input (LVDS)	13
Exhaust Tip	13
Figure 5-7 Exhaust tip \	13
PSU (see figure “PSU trouble shooting“)	14
Figure 5-8 PSU trouble shooting	14
PSU Power Protection	14
5.1.2 Bar Defect (Vertical)	15
Connector	15
Figure 5-9 Connector check (1)	15
Figure 5-10 Connector check (2)	15
Checking the TCP	15
Figure 5-11 TCP torn	15
Figure 5-12 TCP IC broken	15
Control Board	15
Figure 5-13 Control board address flow	15
5.1.3 Line Defect (Vertical)	15
Line Open or Short	15
Figure 5-14 Single line defect	15
Line Open or Short with the Same Distance	16
Figure 5-15 Evenly repeated lines	16
5.1.4 Bar Defect (Horizontal)	16
Connector	16
Figure 5-16 Check FPC connectors	16
Figure 5-17 Check drive connectors	16
Scan IC Check	16
Figure 5-18 Scan IC output diode check	16
5.1.5 Line Defect (Horizontal)	16
FPC Check	16
Figure 5-19 Open FPC electrode / Panel electrode breakdown	16
Scan IC Check	17
Figure 5-20 Scan IC output diode check	17
5.1.6 Mis-discharge Defect	17
Figure 5-21 Mis-discharge	17
Checking Order	17
How to Check an IPM	17
Forward direction	17
Reverse direction	17
Figure 5-22 IPM check	17
5.2 Detailed Module Check	17
5.2.1 No Display	17
The Screen Does Not Display a Picture	17
Figure 5-23 Output waveforms on X, Y, and Z-boards	18
5.2.2 Display Defects	19
Half of the Screen is Not Shown	19
<TABLE>	19
Figure 5-24 Screen display “1/2 display”	19
Vertical Parts of the Screen are Missing	19
Figure 5-25 Screen display “Vertical parts missing”	19
Figure 5-26 Data TCP IC examination	19
Unusual Pattern on Display	19
Figure 5-27 Possible cases	19
Scan FPC Problem	19
Figure 5-28 Screen display “Scan FPC problem”	20
Figure 5-29 Scan IC	20
Vertical Lines with Regular Gap (Vertical Stripe Flash at Special Colour)	20
Figure 5-30 Screen display “Vertical lines with regular gap”	20
Data Copy in Vertical Direction	20
Figure 5-31 Screen display “Data copy in vertical direction”	20
One or Several Vertical Line(s) on the Screen	20
Figure 5-32 Screen display “Vertical lines”	20
One or Several Horizontal Lines on the Screen	20
Figure 5-33 Screen display “Horizontal lines”	20
Low Brightness of Displayed Picture	20
Partially Other Colour on Full White Screen or Partially Mis-Discharge on Full Black Screen.	20
Figure 5-34 Y output voltage waveform	21
No Specified Brightness at Specified Colour	21
5.2.3 Checking for Component Damage	21
Y IPM (IC 18) or Z IPM (IC 2)	21
Figure 5-35 IPM normal output	21
FET assy (Y board: HS2)	21
Figure 5-36 Set_up FET defective	21
Figure 5-37 Set_down FET defective	21
SCAN IC (Y-DRV board: IC1-10)	21
Figure 5-38 SCAN IC defective	22
Figure 5-39 SCAN IC shorted output	22
Figure 5-40 SCAN IC normal output wave	22
TCPs	22
Figure 5-41 COF IC output defective	22
Figure 5-42 TCP normal output	22
Crystal (CTRL board: X1)	22
Figure 5-43 Crystal normal output	23
Figure 5-44 Crystal defective output	23
5.3 Defect Description Form	24
Figure 5-45 Defect Description Form (DDF)	24
6. Block Diagrams, Test Point Overviews, and Waveforms	25
6.1 Block Diagram PDP Module	25
Figure 6-1 Block Diagram	25
7. Circuit Diagrams and PWB Layouts	25
8. Alignments	26
8.1 General	26
8.2 Alignments	26
8.2.1 Tools	26
8.2.2 Connection Diagram and Set-Up	26
Figure 8-1 Measuring equipment connection diagram	26
8.2.3 PSU Alignment	26
Figure 8-2 PSU Alignment	26
Vs Voltage Adjustment	26
Va Voltage Adjustment	27
8.2.4 Y-SUS Alignment	27
Figure 8-3 Y-SUS alignment	27
Condition	27
Vscan Voltage Adjustment	27
-Vy Voltage Adjustment	27
Y -SUS Set-up Voltage Waveform Adjustment	27
Figure 8-4 Trigger point Vs-DA	27
Figure 8-5 V set-up waveform	27
8.2.5 Z-SUS Alignment	28
Figure 8-6 Z-SUS alignment	28
Condition	28
Vzb (Z bias) Voltage Adjustment	28
8.2.6 Internal Test Patterns	28
Figure 8-7 P1: Connector for Internal Test Patterns	28
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets	29
9.1 Introduction	29
9.2 Power Supply Unit (PSU)	29
9.2.1 Purpose	29
Figure 9-1 Power supply	29
9.2.2 Power ON and Power OFF Sequence	30
Figure 9-2 Power supply sequence	30
9.3 Control Board	30
9.3.1 Purpose	30
Figure 9-3 Control board	30
9.4 X Board	30
9.4.1 Purpose	30
Figure 9-4 X boards	30
9.5 Y Sustain Board	31
9.5.1 Purpose	31
Figure 9-5 Y Sustain board	31
9.5.2 Main Components	31
9.6 Y Drive Board	31
9.6.1 Purpose	31
Figure 9-6 Y Drive board	31
9.7 Z Sustain Board	31
9.7.1 Purpose	31
9.7.2 Main Components	31
Figure 9-7 Z Sustain Board	31
9.8 DC/DC Converter Part	32
9.8.1 Purpose	32
Figure 9-8 DC/DC Converter block diagram	32
Figure 9-9 DC/DC Converter part	32
9.9 FPC (Flexible Printed Circuit)	32
9.9.1 Purpose	32
Figure 9-10 Flexible Printed Circuit	32
9.10 FFC (Flat Flexible Cable)	32
9.10.1 Purpose	32
Figure 9-11 Flat Flexible Cable	32
9.11 TCP (Tape Carrier Package)	32
9.11.1 Purpose	32
Figure 9-12 Tape Carrier Package	32
9.12 IPM (Intelligent Power Modules)	33
9.12.1 Purpose	33
Figure 9-13 Intelligent Power Modules	33
9.12.2 Main Components	33
9.13 Abbreviation List	33
9.14 IC Data Sheets	33
10. Spare Parts List	34

Match case Limit results 1 per page

Service Modes, Error Codes, and Fault Finding

EN 19

LGE PDP 2K6

5.2.2

Display Defects

Half of the Screen is Not Shown

•

On the XR board:

Check if the power connector of the XR board is

plugged in correctly.

Check if the 60-pin connection of the CTRL board to

the XR board is plugged in correctly.

•

On the XL board:

Check if the power connector of the XL board is

plugged in correctly.

Check if the 60-pin connection of the CTRL board to

the XL board is plugged in correctly.

•

Replace relevant X board.

Notes:

Relationship between Screen and X board:

Figure 5-24 Screen display “1/2 display”

Vertical Parts of the Screen are Missing

This can be related to a problem between the Data TCP

and the X board.

Verify that the connector of the Data TCP is well connected

to the X board (it corresponds to the part of the screen that

does not display the image).

Confirm whether the Data TCP fails (examination with the

naked eye of blown ICs or other parts included).

–

If an IC is damaged: replace the panel.

–

In case of an X board short circuit or an open PWB

pattern: when the TCP IC is not defective, replace the

X board.

Notes:

•

Example of screen display (any of the Data TCPs can be

shown).

Figure 5-25 Screen display “Vertical parts missing”

•

How to examine the Data TCP IC

–

Connect [1] "Va Power" to the minus and [2] "GND" to

the plus of an ohmmeter, and then examine the diode

in forward or reverse direction.

–

Examine with the naked eye traces of blown ICs [3] or

other parts.

Figure 5-26

Data TCP IC examination

Unusual Pattern on Display

In case of generation of an unusual pattern of the Data TCP

IC unit as shown in the picture below, check the fixation of

the relevant X board. If that doesn’t help, replace the X

board.

In case of "Case 1":

–

Check the connection between the Data TCP

connector and the IC.

–

Replace the relevant X board, or the Control board.

In case of "Case 2" or "Case 3":

–

Check the connection between the CTRL board and

the relevant X board.

–

Replace the relevant X board or the CTRL board.

Note:

•

If the silicon tape between the X board and the heatsink

feels (partially) hard, it has to be replaced.

Figure 5-27 Possible cases

Scan FPC Problem

Check the connection between Y DRV board and Scan

FPC.

If the Scan IC is defective, replace the Y DRV board.

Screen

X-board

Left half of the screen

Right X-board

Right half of the screen

Left X-board

No im

Left half of the screen

Right half of the screen

G_16

90_044.ep

110

F_15590_009.eps

040705

All

Partial

Not at all

G_16

90_0

1.ep

010906

G_16

90_045.ep

140

Case 1

Case 2

Case 3