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)

Page 15
Image 15
Philips FPF42C128135UA-52 technical specifications Short-circuit check on Boards and Power Supply Lines

FPF42C128135UA-52 specifications

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