Philips FPF42C128135UA-52 Short-circuit check on Boards and Power Supply Lines

Page 15

Service Modes, Error Codes, and Fault Finding

FHP PDP

 

5.

 

EN 15

Short-circuit check on Boards and Power Supply Lines

2

Check with an ohmmeter if following pins are shorted

X-SUS

CN23

[X-SUS - PSU]

10

Vs

9

Vs

8

Vs

7

NC

6

GND

5

GND

4

GND

3

Vcc

2

NC

1

Va

CN22

[X-SUS - Y-SUS]

13

-Vs

12

-Vs

11

NC

10

GND

9

NC

8

Vu

7

NC

6

Vcc

5

NC

4

GND

3

NC

2

Vs

1

Vs

X-SUS Board: CN23 pins 3 - 4 CN23 pins 6 - 8 CN22 pins 10 - 13 are shorted?

N

Y-SUS Board: CN32 pins 1 - 4 CN32 pins 8 - 10 CN32 pins 10 - 13 are shorted?

X-SUS board is

Ydefective

(Switching circuit (power supply) has a short-circuit)

Y

Y-SUS board is

defective

 

(Switching circuit (power

Y-SUS

CN32

[Y-SUS - X-SUS]

13

Vs

12

Vs

11

NC

10

GND

9

NC

8

Vcc

7

NC

6

Vx

5

NC

4

GND

3

NC

2

-Vs

1

-Vs

N

Remove SDM from the following two connectors of Y-SUS:

CN34 and CN35

On SDM board, A1-A2, B1-B2, C1-C2, D1-D2, are shorted?

supply) has a short-circuit)

SDM is defective

Y(PDP is defective)

N

A2

A1

B1

B2

C1

C2

D1

D2

On X-BUS board,

CN61 pins 1 - 9Y are shorted?

Remove the 4 XFPCs

(disconnect CN63 , CN64, CN65, CN66)

N

On X-BUS board,

 

 

 

X-BUS board is

 

 

Y

CN61 pins 1 - 9

 

 

are shorted?

 

 

 

defective

 

 

 

 

 

 

 

 

 

 

 

 

PDP

 

 

 

 

 

 

 

N

 

 

 

 

 

is defective

 

 

 

 

 

3

End of analysis

G_16400_027.eps 310706

Figure 5-6 Short circuit check on boards and power supply lines (1/3)

Image 15
Contents Colour Television Module ContentsIndex of this chapter Technical SpecificationsSpecifications Serial NumbersPWB locations Connector positionsLvds connector CN1 Logic Board Some connector layoutsSafety Instructions Safety Instructions, Warnings, and NotesGeneral Directions for UseMechanical Instructions Board Swap InstructionsRadiation plate position SUS Circuit BoardABUS-L Circuit Board ABUS-R Circuit Board Mechanical InstructionsPSU Board Logic BoardRepair Tools Service Modes, Error Codes, and Fault FindingError codes How to Connect the ComPair ToolProcess Flow Advanced PDP Exchange Actual Way-of-WorkingCustomized Repair Repair Instructions 2 42 A4 ALiS Plasma Display PanelRemark Problem analysis procedure PDP repair / board swap Fault Finding FlowchartsProblem Analysis Procedure The entire screen does not light Short-circuit check on Boards and Power Supply Lines ABUS-L board CN52 pins 1 3 or CN52 pins 4 Are shorted? Case of Logic Board replacement ProcedureFollow the Logic Board Exchange Vertical line/Vertical bar problem analysis procedure Replace the defective parts G16400032.eps Horizontal bar problem analysis procedure Logic Board Exchange Logic Board Exchange Fault Fault status Contents #$% Philips Block Diagrams Block Diagrams, Test point Overview, and Wave FormsTest Points Wave Forms Power block diagramCircuit Diagrams and PWB Layouts Voltage Setting ProcedureAlignments Board Function Description Circuit Descriptions and Abbreviation ListSpecifications 42A1 42A2 42A3 42A4 Differences between the Versions A1, A2, A3, and A4Layouts SUS List of abbreviations Spare Parts ListOverview of chassis and manuals, covered by This manual Revision List

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