Diagnosis For Plasma Screen Of Ps And Ph - Prima PS-42D8 B Service Manual

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Table Of Contents

Table of Contents

Parts name

PS-42D8

667-PHID8

Main board

-01 C

video frequency

667-PS42

processor boards

D8-40 C

video frequency

667-PS42

boards

D8-70

Sound

amplification

boards

Transformer board

Remote parts

key-press board

parts

power supply filter

parTs

Trouble diagnosis: Trouble diagnosis:

1.The screen is not bright:

a. Check to see if the power supply plug from the power filter board to the power supply board is

well inserted into the socket. If not, plug it in.

b. Check if the fuse on the power supply board is blown up. If yes, replace it for a good one.

c. Remove our main board and the video frequency processing board, ground the pin 4

POWER_ON/OFF of socket CN802 of the power supply board, and then push the slide switch

SW2001 on the logic board to the internal modes (1, 3 up and 2, 4 down) from external modes (1, 2,

4 up and 3down) Switch the power on and see if the screen is lit. If the screen can give a normal

and completely white field signal, then the problem lies in our main board or video frequency

processing board, which will be dealt with separately.

d. If the screen is not lit, then first replace the power supply board to see if the problem is solved.

e. If the problem remains after the power supply board is replaced, then the problem lies in the screen.

Replace the entire screen for treatment.

2.There appears on the screen a line or several unlit lines.

Parts number

PH-42D8

667-PHID8

-01 U

667-PH42

D8-40 U

667-PS42

D8-70 U

667-PS42D8-24

667-PS42D8-46

301-UPS4

2D8-09

2D8-06R

667-PH42D8-05

667-PS42D8-51 C