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Related Manuals for XOCECO PH-50T18
Summary of Contents for XOCECO PH-50T18
- Page 1 PDP TELEVISION PH-50T18...
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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……………………………………………………………..…… Wiring diagram……………………………………………………………………………..… Assembly list………..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…. Trouble shooting guide ………………………………………………………..……………... Schematic diagram …………………………………………………………………….….. -
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 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.
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Page 6: Alignment Instructions
Alignment instructions 1 Alignment equipment PM5518 (video signal generator) K-7253 (VGA signal generator) CA100 (white balancer) VG-849 2 Alignment flow-chart The alignment flow-chart is shown as fig-1 Check MEGA8, DDC and FLASH To produce digital board and HF board Check the digital board and HF board All testing Connect with central signal source, then check each function of TV such as analog control etc., check the output of headphone and speaker... - Page 7 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, 800*600/75Hz/85Hz, 1280*1024/60Hz/75Hz and 1600*1200/60Hz respectively, press “AUTO” to do the auto adjustment until the screen is filled with picture. 3.2.3.2 ADC adjustment of VGA channel Input the signal of 16 grades of grey density to VG-849 TIME921, PATTERN889, enter factory menu, select ADC auto correction.
- Page 8 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. Fixed gain_B to 128, Adjust gain_R and gain_G, let the color coordinate of seventh level be 285 and 290. Adjust offset_G and offset_B and gain_R and gain_G repeatedly until the value of the two levels gray-scale to 285 and 290.
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Page 9: 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 10: Block Diagram
Block diagram AV1 Video Audio M51797 R2S15900 MP7720 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 YPbPr2/YcbCr2 ADC+Decord 24bit RGB PW118 PDP SCREEN LVDS... -
Page 11: Working Principle Analysis Of The Unit
Working principle analysis of the unit 1. TV board part The audio signal from AV1, AV2, YpbPr2 send directly to AV switch (M52797), output the audio signal of the selected channel and separate to two ways; one way after amplifying 6 db is AU OUT; another way send to audio and sound processor IC N907 R2A15900. - Page 12 and the related sync signal are outputted to N602 PW118 to make the processing. PW2300 complete mainly the functions of 3D comb filter, the channel switch, 5-line Y/C separation, the color decoding and so on. It connect external SDRAM chip N703 HY57V161610E treated as the internal memory to assist the operation of PW2300.
- Page 13 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 14 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 15 The arrangement diagram of the pins: 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.
- Page 16 PW118 internal block diagram: 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 17 M52797 Internal block diagram: The arrangement diagram of the pins:...
- Page 18 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 19 R2S15900 instruction of the pin: 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):...
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Page 20: 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 21 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 22 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.
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Page 23: 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 24: Assembly List
Assembly list Parts No. (203-PH50T180-03) Description SPH50T180-03A10 Software PW118 SPS42T60-01B10 Software MEGA8 SPS42T60-01C10 Software HDMI EDID SPS42T60-01D10 Software VGA EDID 301-IL37T25-04 RC-I04 remote control 535-DZ2850-01 Panel stand assembly (DZ-2850) 535-PH50D8-05 Mounting assembly 615-20513-AW0 Speaker assembly 667-PSIT6-55A High frequency board 667-PH50T18-69 Digital processing board 667-PH50T18-51 Supply power filter board... -
Page 25: 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 26 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 27 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 28 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 29 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...
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Page 30: Schematic Diagram
Digital board... - Page 31 Digital board...
- Page 32 Digital board...
- Page 33 Digital board...
- Page 34 Digital board...
- Page 35 Digital board...
- Page 36 Digital board...
- Page 37 Digital board...
- Page 38 High frequency board...
- Page 39 Key board...
- Page 40 603-PH50T180-03 Ver.1.0...