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Prima PS-42D8 B Service Manual

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COLOR TELEVISION
PS-42D8 B
PS-42D8 S
PH-42D8

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Summary of Contents for Prima PS-42D8 B

  • Page 1 COLOR TELEVISION PS-42D8 B PS-42D8 S PH-42D8...

  • Page 2: Table Of Contents

    CONTENT Safety instructions………………………………………………………………………..… Method of Debugging ……………….…………………………….…….………………… Method of software upgrading ………………………………………….………………… Briefing on the operation principle of the plasma TV series PS and PH ……………. Wiring diagram……………………………………………………………..……………..Distribution of the Circuit Board of Different Screens and their Functions ……….… PCB parts and number …………………………………………………………………….

  • Page 3: Safety Instructions

    Note: This maintenance manual is intended only for the reference of the maintenance people. Please pay attention to the following points before carrying out the maintenance work. Safety Instructions Please read the “Points for attention for the Maintenance & Repair of PDP”and “Criterion for Identifying the Defects on Screen”...
  • Page 4 should cause glass breakage that may get people injured. Two people are needed in cooperation to move this module lest contingency takes place. 1.9 The complete TV set is designed on the basis of full consideration of thermal dissipation by convection, with the round hole on the top for heat emission.
  • Page 5 The PDP produced by our Company at present uses the following criterion for identifying the defective points: MODEL PS-42D8 B/S,PH-42D8: There may appear three kinds of defective points for this model as shown in Fig.1, i.e.bright spot (remain bright); dark spot (non-illuminating); flickering spot (continuously flickering).

  • Page 6: Method Of Debugging

    15mm. Method of Debugging For Models PS-42D8 B/S PH-42D8, the debugging part lies only in the white balance adjustment. Nothing else should be adjusted and the maintenance software supplied for after-sale purpose has normally shielded the value of white balance i.e., no more adjustment is needed when upgrading the software.

  • Page 7: Method Of Software Upgrading

    Method of software upgrading The plasma TV models PS-42D8 B/S and PH-42D8 launched by our company are equipped with RS-232 interface for upgrading that is carried in the steps below: Select a connection wire of serial port (see the figure below) which is required to have a notch on its both ends and also the pins 2 and 3 on the two ends are cross-connected.
  • Page 8 Based on the features of computer set up the serial port (COM Port) and select corresponding serial port (if it’s not possible to burnt-write other serial port can be used instead). Baud-select 115200 and then select Reset Target After Download. Hit flash press button and it’s ready to operate.

  • Page 9: Briefing On The Operation Principle Of The Plasma Tv Series Ps And Ph

    100 mm (Our Model PS-42D8 is only 79mm thick and it’s the thinnest in the market at present.) Plasma TV model PS-42D8 B/S and PH-42D8 series of XOCECO is designed and developed by XOCECO itself. In terms of the main CMOS chip this series of TV set employs PW181 made by...
  • Page 11 Among which:video decoder:VPC3230 Non-interlace conversion:PW1230 Ad conversion and DVI interface :AD9887 Audio treatment:MSP3440 Sound power amplification:D type power amplification of TI : Tpa3001 3D Y/C separation:uPD64083 CCD/V-CHIPdecoder:Z86229(For North America only) 2. the basic work process flow of model PS and PH series: 2.1.
  • Page 12 The block diagram of MSP3440 is as follows: 2, 3:SCL and SDA for the control of IC operation; 27,28:output to the right and left channel of sound power amplifier; 33,34:right and left channel of earphone sound; 36,37:AV OUT right and left channel of sound; 47,48:right and left channel of sound fed from main board;...
  • Page 13 In which: Pin 71 is used for the input of C signal of SVHS; Pin 72 VIN1 is used for the input of Y signal of CVBS or SVHS of AV; Pin 73 VIN2 is used for the input of TV signal; Pin 75 VIN4 is used for the input of Y signal of YCRCB to synchronously identify YCRCB.
  • Page 14 picture effect is better than that of sub-picture. The adjustment of brightness, contrast, definition and chroma is performed by N302. The decoding of CCD/V-CHIP in this channel is specially performed by 21 line decoder N301 Z86229. The decoded information is superposed onto the image in N302 also in the form of R, G, B and For VGA and YPRPB, after the selection in N1 YPRPB1 and YPRPB2 are fed together with N402 for channel selection.
  • Page 15 2.3.2 Block diagram of AD9887 is shown below Finally the video signals of different channels are sent respectively to V PORT and G PORT of main processing chip PW181 for processing. PW181 has such processing capabilities as “picture out of picture”, “picture in picture”, “multiple pictures”.
  • Page 16 PW181 is also the main CPU. Its program is stored in the externally connected flash N601. The software upgrading of RS-232 is actually the upgrading of the stored memory in N601 by PW181. The interface of menu is also produced by PW181. PW181 can automatically produce self check signal for trouble shooting.

  • Page 17: Wiring Diagram

    WIRING DIAGRAM 1.PS-42D8 B CN8002 CN5008 CN5001 BUFFER BUFFER...
  • Page 18 2.PS-42D8 S CN8002 CN5008 CN5001 BUFFER BUFFER...
  • Page 19 3.PH-42D8 CN8002 CN2006 CN2007 CN5008 CN5001 BUFFER BUFFER...

  • Page 20: Distribution Of The Circuit Board Of Different Screens And Their Functions

    Distribution of the Circuit Board of Different Screens and their Functions 42SD-V3(Type: S42 SD-YB03,Code No: 335-42001-00) Power board(2) Power board(1) Xdriving Y driving Logic board Y BUFFER logic BUFFER 42HD-V3 (Type:S42AX-XB01,Code No:335-42002-00) logic BUFFER Power board(1) Power board(2) X driving Ydriving Logic board Y BUFFER...

  • Page 21: Pcb Parts And Number

    * Power supply board: to supply power for the screen, other functional modules on the screen, our own main board, and video frequency processing board. * X driving board: to produce and provide driving signal for X electrode according to the time sequence signal sent from logic board.

  • Page 22: Diagnosis For Plasma Screen Of Ps And Ph

    Parts number Parts name Main parts and number PS-42D8 PH-42D8 PS-42D8S N501 PW181-20 (353-01810-00) N204 PW1230 (353-12300-00) 667-PHID8 667-PHID8 667-PSID8 N403 AD9887-140 (353-98870-30) Main board -01 C -01 U -01S N102/N302 VPC3230D (353-32300-80) N602 DS90C385MTD (353-03850-20) N601 AM29LV800BT-90E(353-29800-10) NM5 SDA555XFL (352-05550-20) video frequency 667-PS42 667-PH42...
  • Page 23 Check if the socket between Y driving board and Y BUFFER is plugged well. If not, plug it well. If yes then replace Y BUFFER (upper, lower) in respect to the upper , lower part of the dark line on the screen.
  • Page 24 a. If it’s a vertical bright line of other colors, then the problem lies with COF or the screen. b. If it’s an entire vertical block of other colors, then first check to see if the connection socket between COF and logice BUFFER has problem. If no problem, check if the connection socket between the logic BUFFER and the logic board is normal.

  • Page 25: Troubleshooting Guide

    Troubleshooting guide 1.no raster and not sound If power indication Turn off the set ,unplug lamp is lit VGA cable,disconnect power board(2) and signal process Check if the red board,connect X709 Check 5V-STBY indicator pin8 to GND,set panel LED8004 to self-check status,turn abnormal onpower board on the set again,check...
  • Page 26 2.no picture and have sound： Check if there’s initial screen with logo appearing Check Turn of power board N501 Check N302 No picture and signal process board,X709 pin8,check if the screen light up? Test R342-345 YC signal Check In which signal N501 channel ther is no Screnn bad...
  • Page 27 Call out double screen,set the two screen’s signal source TV,confirm if the split screen is normal normal abnormal Check if the input AV Check input signal is normal double screen signal is normal normal abnormal normal abnormal Check N102 output signal Check TUNER1 Check Check VGA...
  • Page 28 Setting up for the self check of the screen: For 42”SD-v3 screen (S42SD-YB04):Push down 2 and 4 and push up 3 of SW2001on the logic board; For 42”HD-V3 screen (S42AX-XB01): Push down 2 and 4 and push up 3 of SW2001on the logic board Please make sure resume it to the original status when the check is over.
  • Page 29 Failure with resistor rows R415, R418, R422, R424, R429, R430，which may lead to loss of corresponding color from the gray degree corresponding to the picture of channel DVI. Failure with resistor rows R342, R343, R344, R345，which may lead to loss of corresponding color from the gray degree corresponding to the picture of sub-channels TV/AV/YCRCB, or lead to abnormal brightness.

This manual is also suitable for:

Ps-42d8 sPh-42d8

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