XOCECO PH-50T18 Service Manual Download | Manualshive

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Summary of Contents for PH-50T18

Page 1: ...PDP TELEVISION PH 50T18...

Page 2: ...lignment 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 diag...

Page 3: ...eat radiation parts or direct exposure to sunlight Otherwise there will be kickbacks 1 5 In case foreign substances such as water liquid metal slices or others fall into the module carelessly power mu...

Page 4: ...former On the other hand even if changes take place in the picture it can keep its brightness for a period of time several minutes It s a feature inherent with plasma and it s not abnormal However ple...

Page 5: ...ecome 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 carefu...

Page 6: ...enu 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 Check MEGA8 D...

Page 7: ...djust 3 2 3 2 item ADC auto correction again 3 2 4 AV TV channel adjustment 3 2 4 1 sub brightness and sub contrast adjustment Input the AV color bar signal PM5518 COLOUR BAR 100 to VIDEO terminal adj...

Page 8: ..._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 Select 12000k of m...

Page 9: ...et up the serial port COM Port Select corresponding serial port if it s unable to FLASH WRITE change to another port Baud is selected to be 115200 Then select Reset Target After Download Click FLASH p...

Page 10: ...Audio MP7720 x 2 Class D NJW1109 Speaker Earphone SDRAM PW118 MCU and scaler AD9398 HDMI Flash MX29LV800 DDR SDRAM 128M EM6A9320 PDP SCREEN 24bit RGB 24bit RGB AV2 Audio HD2 Audio S Video YPbPr1 YcbC...

Page 11: ...e video decoding then the video signal of S VIDEO YpbPr1 YpbPr2 VGA send to PW2300 N700 synchronously All of these video signals shall be sent to this chip to make the video decoding or the AD convers...

Page 12: ...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...

Page 13: ...14 GBE 0 7 Blue data output 3 2 AD9398 The chip of high definition multimedia interface AD9398 HDMI High D efinition Multimedia Interface this interface is the digital interface standard that bring up...

Page 14: ...ATA HDCP serial data I O 20 21 MCLK Control clock output 51 MCL HDCP control series data clock 22 I2S_SCK Audio series clock output 52 MDA HDCP control series data I O 23 I2S_WS Bus clock data output...

Page 15: ...of this set It take charge of all control except for the power supply control including the control of each chip operation in the main board eg the image manipulation the channel switch the image disp...

Page 16: ...rnal 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...

Page 17: ...15 M52797 Internal block diagram The arrangement diagram of the pins...

Page 18: ...Video output to AVOUT interface 7 AV1 audio input 24 Left track audio output 8 AV1_R audio input 25 TV_R audio input 9 AV2_L audio input 26 TV video input 10 AV2 audio input 27 TV_L audio input 11 AV...

Page 19: ...6 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 Name Description Pin No Name Descriptio...

Page 20: ...driving signal for X and Y driving boards Logic BUFFER board To convert the data signal and control signal sent from the logic board into the signals required by COF Y BUFFER board to transmit the sc...

Page 21: ...oblem 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 solve...

Page 22: ...problem still remains when the replacement is over then replace the logic board 5 There appears on the screen a mono color signal and one or several vertical bright lines of other colors a If it s a v...

Page 23: ...rd X600 X400 X405 RS 232 HDMI VGA YPbPr YCbCr1 YPbPr YCbCr2 Power supply filter board Speaker assembly button board Logic board LA03 Power supply board CN9004 CN9003 CN8001 X301 X300 X302 X904 X903 X9...

Page 24: ...A 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...

Page 25: ...light is on Check 5V STBY Cut off the connection between power supply board and data board and test 5V STBY Check N401 and keyboard The problem of power supplies board Check power supply D3 3V D5V Mea...

Page 26: ...but no picture Display logo Check if all other channel has no picture N602 PW118 and periphery circuit Turn to check 4 of program Check if the G401 and G7000 have the signal wave Unfix X405 and X406...

Page 27: ...8 is output The sound damaged Check if the second pin of sound power amplifier input the signal Measure if the sound input of current channel of N907 is normal Check N907 or peripheral circuits Check...

Page 28: ...face circuit Check if the YPRYPB input pin of N700 have signal Check N700 and periphery circuit Yes No No Yes Check if the input signal of N700 is normal Check if AV channel is normal N700 damaged Che...

Page 29: ...nd definition TV set abnormal vertically on half screen of high definition TV set They may be caused by the damage of the address BUFFER module that directly corresponds to its position or may be caus...

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Page 38: ...High frequency board...

Page 39: ...Key board...

Page 40: ...603 PH50T180 03 Ver 1 0...

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