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Prima PS-42T8 Service Manual

Prima pdp television service manual
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PDP TELEVISION
PS-42T8
Brazil

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Summary of Contents for Prima PS-42T8

  • Page 1 PDP TELEVISION PS-42T8 Brazil...

  • Page 2: Table Of Contents

    CONTENTS Safety Precautions………………………………………………………………………..… Alignment instructions. ………………………………….…………………………….… Method of software upgrading …………………………………………….…………………… Block diagram ……………………………..…..…..…..…..…..…….………….…………. Working principle analysis of the unit……………………..……………………….………… Diagnose and service of panel……………………………………………………………..20… Wiring diagram……………………………………………………………………………..… Assembly list………..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…. Trouble shooting guide ………………………………………………………..…………….. Schematic diagram …………………………………………………………………….….. APPENDIX: Exploded view...

  • Page 3: Safety Precautions

    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 Precautions Please read the “Points for attention for the Maintenance & Repair of PDP” and “Criterion for Identifying the Defects on Screen”...
  • Page 4 static electricity. During maintenance operation be sure to cover yourself with anti-static bag and before operation make sure to have it sufficiently grounded. 1.11 There are a big number of connection wires distributed around the screen. Please take care not to touch or scuff them during maintenance or removing the screen, because once they are damaged the screen will fail to work and it’s not possible to repair it.

  • Page 5: Alignment Instructions

    become a potential safety trouble. 1.22 In addition to plasma screen, the glass is a part of high value. It has such functions as anti-radiation, adjustment of color temperature etc. Please handle it carefully. Alignment instructions 1 Alignment equipment PM5518 (video signal generator) K-7253 (VGA signal generator) CA100 (white balancer) VG-849...
  • Page 6 3.2.2 Enter factory menu mode (service mode) Press the MENU button, press the number button: 1 → 9 → 7 → 9, enter factory menu, then use VOL+/- select item value and CH+/- change it. Press the MENU button exit the factory menu. 3.2.3 VGA channel adjustment 3.2.3.1 VGA channel mode preset Input VGA signal of K-7253, select 640*480/75Hz/85Hz, 1024*768/70Hz/75Hz/80/Hz/85Hz,...
  • Page 7 Bar signal, enter factory menu, ADC auto correction. b. Connect YPbPr signal of K-7253 signal to YPbPr terminal, Input 8 level gray-scale of TIME380 (480i) PATTERN471 signal, enter white balance adjustment menu; Select 9300k of “mode”, fixed offset_R to 128, adjust offset_G and offset_B, let the color coordinate of the third level be 285 and 290 and its brightness be 4.5-5nit.

  • Page 8: Method Of Software Upgrading

    Method of software upgrading Steps of software upgrading are as follows: 1. Select a serial connection wire and a VGA connection wire and then connect them by means of a patch panel; 2. Use a serial wire to connect the PC to the patch panel and set TV set to off state; Open the software upgrade file holder and double click FlashUpgrader (window 2000/XP/NT) The following interfaces will show up after running the program:...

  • Page 9: Block Diagram

    Block diagram Audio TUNER LA72700 or SIF TV VIDEO TV audio AV1 Video Audio M51797 R2S15900 TDA3001 x 2 class-D Speaker AV2 Video AV Switch Audio switch and control NJW1109 Earphone AV1 Audio AV2 Audio HD2 Audio Video SDRAM Flash MX29LV800 S-Video YPbPr1/YcbCr1 PW2300...

  • Page 10: Working Principle Analysis Of The Unit

    Working principle analysis of the unit 1. TV board part This set adopt all system for integrative tuner (include high frequency and intermediate frequency amplification circuit), the antenna receive the signal and send to the tuner, the tuner is controlled N602 PW118 MCU (by SDA, SCL), and select the appropriate channel, switch the right mode, after the high frequency amplification and intermediate frequency amplification, output the video and audio signals.
  • Page 11 3. IC function, the internal block diagram, the pin introduction 3.1 PW2300 PW2300 is a piece of the front-end video-processing chip that integrates a high-powered, multi-system video decoder with a high speech ADC module. All of the input video signal (except for HDMI signal) are inputted to this chip to the AD switch and video decoding, 24 bit digital RGB signal and the related sync signal are outputted to N602 PW118 to make the processing.
  • Page 12 PW2300 instruction of the pin: Name Function Name Function Resonator input AV1 blue input XOUT Resonator output AV2 red input C bus data AV2 green input C bus clock CVBS_SOG1 T multiple green sync output of video signal VGA-R1 VGA red S-VHS color signal input VGA-G1 VGA green GVBI...
  • Page 13 AD9880 (AD9398) internal block diagram: AD9880 (AD9398) instruction of the pin: Name Function Name Function GGE(0-7) Switch output RXC+ DVI digital video input 12-19 GBE(0-7) Switch output DDC_CLK HDCP (serial data clock) 92-99 GRE(0-7) Switch output DDC_DATA HDCP (serial data I/O) 20, 21 MCLK Control clock output...
  • Page 14 3.3 PW118 PW118 is the new high-powered image manipulation chip of Pixelworks. The 24 bit digital RGB signal and the related sync signal outputted by AD9398 and PW2300 shall be inputted to this chip to make the image manipulation, and are outputted LVDS signal to drive the screen directly. In addition to the function of interlaced to line-by-line, this chip further include the function of image enhancement, etc.
  • Page 15 The arrangement diagram of the pins: 3.4 M52797 M52797 is a AV switch chip controlled by IIC. This chip include 4 group of video input and 4 group of audio input, 2 video output and 1 audio output.
  • Page 16 M52797 Internal block diagram: The arrangement diagram of the pins:...
  • Page 17 M52797 instruction of the pin: Function Function YPbPr2_L audio input Video output to PW2300 YPbPr2_R audio input Right track audio output AV1_L audio input Video output to AVOUT interface AV1 audio input Left track audio output AV1_R audio input TV_R audio input AV2_L audio input TV video input AV2 audio input...
  • Page 18 R2S15900 instruction of the pin:...
  • Page 19 Function Function 2, 27 Left and right track of M52797 5, 24 Left and right track of YPbPr1 3, 26 Left and right track of HDMI 11, 19 Left and right track of audio output 4, 25 Left and right track of VGA 3.6 LA72700 (STEREO/SAP DECODER): PIN description: Pin No.
  • Page 20 3.7 TDA3001 DESCRIPTION The TPA3001D1 is a 20-W mono bridge-tied load (BTL) class-D audio power amplifier with high efficiency, eliminating the need for heat sinks. The TPA3001D1 can drive 4-Ω or 8-Ω speakers with only a ferrite bead filter required to reduce EMI. The gain of the amplifier is controlled by two input terminals,GAIN1 and GAIN0.
  • Page 21 Pins of TDA3001...

  • Page 22: Diagnose And Service Of Panel

    Diagnose and service of panel 1. Block function of panel The power supply board, Logic board, X drive board, Y drives board, Logic BUFFER (E, F and G) and Y BUFFER (upper and lower) of the PDP panel. Y BUFFER (upper) Power supply board Y drive board X drive board...
  • Page 23 POWER_ON/OFF of socket CN802 of the power supply board; Solder point 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). SW2001 Switch the power on and see if the screen is lit.
  • Page 24 yes then replace Y BUFFER (upper, lower) in respect to the upper, lower part of the dark line on the screen. 2.3 There appear on the screen one or several horizontal lines that are much brighter than the remaining horizontal lines at the edge: Check if the socket between Y driving board and Y BUFFER is plugged well.

  • Page 25: Wiring Diagram

    Wiring Diagram Panel Power supply filter board Logic board Power supply board LA03 CN9004 CN9003 CN8001 Speaker assembly X600 X400 X405 X909 X908 Data processing board HF board RS-232 HDMI AV out S-Video in AV1 in AV2 in earphone YPbPr/YCbCr1 YPbPr/YCbCr2...

  • Page 26: Assembly List

    Assembly list Parts No. (203-PS42T80-29S) Description 535-PH42T8-02 Power filter board 535-RCP03-00W Remote control 615-10412-03S Stand assy 615-20543-00S Speaker assy 667-PSIT8-69 Data processing board 667-PS42D8-20 Power board 667-PS42T6-05 Button board 667-PS42T8-55D High frequency board 335-42015-00 Panel (PDP42V70413)

  • Page 27: Trouble Shooting Guide

    Trouble shooting guide 1.No raster, no picture, no sound No raster, no picture, no sound. Check if the power supply indicator light is on. Check power supply Check 5V-STBY D3.3V, D5V Abnormal Normal Cut off the connection between power supply Measure the level of 8 pin of X405: Check...
  • Page 28 2.With sound but no picture: With sound but no picture. Display logo? Check if all other channel Check if the G401 and has no picture. G7000 have the signal wave. Unfix X405 and X406, short Turn to check 4 N602 PW118 Normal circuit the PIN8 of X405 to GND,...
  • Page 29 3.With picture but no sound: If the sound power board X908 is output. Check if the second pin of sound The sound damaged. power amplifier input the signal. Measure if the sound The sound power amplifier or peripheral input of current channel circuit has problem.
  • Page 30 4.2 YPrPb or YCrCb no picture Check if YPRPB1 / YCRCB1 and YPRPB2 /YCRCB2 channels is no picture. Check if the YPRYPB input pin check interface of N700 have signal. circuit. Check N700 periphery circuit 4.3 TV no picture Check if the input signal of N700 is normal.
  • Page 31 4.4 VGA no picture Check if the input YPRPB signal is normal. Check the horizontal and vertical sync Check N700 and signal of HS1 and VS1 input of N700. periphery circuit Normal Abnormal Check N700 and The matter of input periphery circuit interface circuit, N211 and periphery circuit...
  • Page 45 Exploded views list DESCRIPTION DESCRIPTION Speaker cover Trans-connecting support Speaker front cover Panel Speaker Main board assy Speaker back cover Video board assy Speaker fixed board Trans-connecting board assy Panel frame assy Back cover Middle cabinet Socket LED column Screw Button board assy Socket Button...
  • Page 46 603-PS42T80-29S Ver.1.0...

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