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Gateway 46” PTV Service Training
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Gateway 46” PTV Service Training

Gateway 46” PTV Service Training

Plasma display
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Service Training of 46" PTV
isplaying your vision!

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Summary of Contents for Gateway 46” PTV

  • Page 1 Service Training of 46” PTV isplaying your vision!
  • Page 2 PDP Whole Components MODULE MODULE • • panel panel There are pc.s There are pc.s X/Y Sustainer board X/Y Sustainer board including pc.s pc.s including pc.s pc.s 、 、 X/Y extension board W PCB X/Y extension board W PCB pc.s pc.s 、...
  • Page 3 Easy maintenance of Plasma Display Parts position Audio Board DIF Board X-Sustainer Y- FPC X- FPC Extension Extension board board(upper (upper and and lower) lower) Speaker Speaker Tuner W- FPC Extension board Ac Line filter Y-Sustainer Power Supply (left and right) isplaying your vision!
  • Page 4 Easy maintenance of Plasma Display Block diagram of system isplaying your vision!
  • Page 5 Easy maintenance of Plasma Display PCB function 1.Power：(1).Input voltage:AC 110V〜240V、47Hz〜63Hz. Input range:90V(Min)〜265V(Max) auto regulation. (2).To provide power for PCBs. 2.VIF(Video InterFace)：To converter TV signals, S signals、AV signals、PC signals and D-SUB signals to digital ones and to transmit to DIF. 3.DIF(Digital InterFace)：Dealing with the digital signal for output to panel. 4.X-Sustainer / Y-Sustainer：(1).
  • Page 6 Easy maintenance of Plasma Display Basic operation of Plasma Display 1. After turning on power switch, power board sends Vsby +5V Volt to Micro Processor IC waiting for ON signals from Key Switch or Remote Receiver. 2. When the ON signal from Key Switch or Remote Receiver is detected，Micro Processor will send ON Control signals to Power.
  • Page 7 VIF Board VIF System Structure Scalar Output D-SUB Converter Chip to DIF TMDS Receiver Y/Cb/Cr Interlace S-Video Video Composite Decoder Micro_Controller Tuner First To a 3D Y/C separating IC isplaying your vision!
  • Page 8 VIF System Block Diagram ADC Converter : AD9888 KS The AD9888 is a complete 8 bit , 205 MSPS monolithic analog interface optimized for capturing RGB graphics signals. Its 205 MSPS encode rate capability and full-power analog bandwidth of 500 MHz supports resolutions up to UXGA(1600 x1200 @ 75 Hz).
  • Page 9 VIF System Block Diagram VIDEO Decoder :SAA7118E The SAA7118E decoder is a ADC, too. But it can deal with the ordinary TV signals. The SAA7118E can be input Composite 、S-video 、Component signals and its outputs are digital Y(Luminance) , C(Chromaticity) signals And it also can adjust brightness , contrast , saturation , hue .
  • Page 10 VIF System Block Diagram Image Processor Chip:PW171-20U(system on chip) PW171-20U(system on chip) Image Processor chip: ◎ Scaling function : The Image scalars provide high quality up and down image scaling . For the applications of VIF , the input signals could be VGA , SVGA , XGA formats , and its output fixed at 852 x 480 @60 HZ .
  • Page 11 DIF Board DIF Structure isplaying your vision!
  • Page 12 Three Functions of DIF : (1)Image Signals Processing Transfer image signal into R、G、B signal respectively and according to the characteristic of a frame needed to process and adjust the signal. (2)Waveform Controlling This function is accomplished by IC106, it generate the controlling waveform signals of X,Y sustainer (3)Power Controlling The functions of APC (auto power control) are important to...
  • Page 13 APC Function isplaying your vision!
  • Page 14 Function Function After image data is transmitted to APC by signals processing unit，the Calculate Display Ratio begins to calculate the ratio of pattern. After checking and calculating pattern(A ,B , C) , the numbers of pattern , then sending the data of display and switching count to the window memory .

  • Page 15: Power Board Layout

    Power Board Power Board Layout Volts settings position isplaying your vision!
  • Page 16 Power Output Spec. Name Output Max Load Peak load 1.0A 2.0A 3.0A 2.0A Vfan 0.5A cancelled 0.6A 170V 290W -160V 0.1A Vaux 380V isplaying your vision!
  • Page 17 X Sustainer X – Sustainer Layout J1:X - input J3: W - Vw 65V input PX2:VXG,VCC input PX1:VF,VW,VS input J301:X –U output J302:X – L output isplaying your vision!
  • Page 18 X – Sustainer Power Spec. Input Input Remark Input item volt(VDC) current(mA) Normal range:40~150mA (Full white) 1.2A Normal range:1.0~1.5A -160 1.2A Normal range:1.0~1.5A -160 isplaying your vision!
  • Page 19 X – Sustainer CKT instruction We have 2 sorts of low – volt system：To provide 5V and 15V for driving waveform. 65V：The volt of X - Vxe(Vw) is 65V. And there are 2 sets CKT in X： one is 65V for +NAMARI；the other is 65V for W – COF. The 65V in Y –...
  • Page 20 Y Sustainer Sustainer Lay out Sustainer Lay out – – J302:Y - output connects J301:Y - output connects to Y - FPC to Y - FPC J3:To input W – J1:Y – input power： signals to 20PIN Vcc，Vf， Vs，Vysc，Vw isplaying your vision!
  • Page 21 Y – Sustainer Power Spec. Input Item Input Input Remark Volts Current (VDC) (mA) Normal range:40~150mA (Full White) 1.2A Normal range:1.0~1.5A Vysc isplaying your vision!
  • Page 22 Y – Sustainer CKT instruction We have 2 sorts of low – volt system：To provide 5V and 15V for driving waveform. 65V：The 65V in Y – Vysc to produce 35V for Bulk during addressing period. High volts are 170V and -160V for PDP driving volts. isplaying your vision!
  • Page 23 Easy maintenance of Plasma Display PCB failure analysis 1. DIF:a.Abnormal noise on screen. b.No picture 2. VIF: a.Lacking color、Bad color scale. b.No voice. c.No picture but with signals output、OSD and back light. d. Abnormal noise on screen 3. POWER:No picture、no power output. 4.
  • Page 24 Easy maintenance of Plasma Display PCB failure analysis 8. X extension PCB fail Brighter picture picture 9. Y extension PCB fail Darker picture isplaying your vision!
  • Page 25 Main Repair Flow Chart-1 Defective PDP Judgment Can not repair Customer responsibility CPT responsibility Repair ? Out-of-warranty Repair Warranty ? Out-0f-warranty Not repair What’s wrong Signal failure Panel screen defect Power failure isplaying your vision!
  • Page 26 Main Repair Flow Chart-2 Disassemble and Disassemble and Check Check Replace PCB Next flow chart Replace Module Adjustment QA Test Repair Center Send back to Customer isplaying your vision!
  • Page 27 Flow Chart:Power Failure-1 CFM Power cord OK Power OK ? PDP switch ON ? Turn on power switch Stand-By Red light OK Replace Fuse AC inlet Fuse burned ? Power board Fuse burned ? Plug out connector PV/ CN , Check CN connector= 5 Replace Fuse volts(1+ , 6 - ) ? Check CN connector= 5 volts...
  • Page 28 Flow Chart:Power Failure-2 Adj. VR151 make sure Voltage = 4.9V ~5.3V ? Voltage = 4.9V ~5.3V Replace VIF board Check PD connector= 5 volts(1+ , 4 - ) Adj. VR253 make Power on to check voltage = 4.9V~5.3V ? sure Voltage = 4.9V ~5.3V Plug out PX1,PX2,PY one by...
  • Page 29 Easy maintenance of Plasma Display Failure status of example 1.No picture Standby indicator(red) does not work. isplaying your vision!
  • Page 30 Easy maintenance of Plasma Display Check if the power is on. Check if the fuse is burnt out. isplaying your vision!
  • Page 31 Easy maintenance of Plasma Display 2.Power is on but no picture. The indicator worked after starting up. isplaying your vision!
  • Page 32 Easy maintenance of Plasma Display Maybe VIF failed. Maybe DIF failed. Replace the VIF first. If it doesn’t work, then replace DIF. But after action as above, it still doesn’t work. Replace X sustainer boards. isplaying your vision!
  • Page 33 Easy maintenance of Plasma Display 3.Picture indistinct(IW) Replace the Y sustainer board. isplaying your vision!
  • Page 34 Easy maintenance of Plasma Display 4.For the figure as below , check the connection of FPC. If the connection is O.K. Replace the X extension board. isplaying your vision!
  • Page 35 Easy maintenance of Plasma Display 5.For the figure as below , check the connection of FPC. If the connection is O.K. Replace the Y extension board. isplaying your vision!
  • Page 36 Easy maintenance of Plasma Display 6.For the figure as below , check the connection between W side PCB with COF. isplaying your vision!
  • Page 37 Easy maintenance of Plasma Display It’s caused by bad connection of COF. isplaying your vision!
  • Page 38 Easy maintenance of Plasma Display 7.There is something wrong on the left side of the panel. isplaying your vision!
  • Page 39 Easy maintenance of Plasma Display We have a bad connection. isplaying your vision!
  • Page 40 Easy maintenance of Plasma Display 8.There is something wrong on the upper side of the panel. isplaying your vision!
  • Page 41 Easy maintenance of Plasma Display We have a bad connection. isplaying your vision!
  • Page 42 Easy maintenance of Plasma Display 9.There is something wrong with image. isplaying your vision!
  • Page 43 Easy maintenance of Plasma Display Maybe VIF failed. Maybe DIF failed. Replace the VIF first. If it doesn’t work, then replace DIF. But after action as above, it still doesn’t work. Replace X sustainer boards. isplaying your vision!
  • Page 44 Easy maintenance of Plasma Display 10.There is a stripe on the screen. Replace X extension board. (But if it still does not wok , then it was caused by the bus electrode problem -> panel’s problem.) Stripe isplaying your vision!
  • Page 45 Easy maintenance of Plasma Display 11.The status as below, replace DIF board. First, we thought there is something wrong in Y – FPC. But not. Why ????? 1.As general display abnormal isn’t caused by failed extension board. 2.As figure above shown, we knew something wrong in upper display and high brightness.
  • Page 46 Easy maintenance of Plasma Display 12.The status as below, replace video board. Still in Searching. isplaying your vision!
  • Page 47 Easy maintenance of Plasma Display 13.This is called I.W. Adjust the Vs voltage by DVM. isplaying your vision!
  • Page 48 Easy maintenance of Plasma Display Volts settings position isplaying your vision!
  • Page 49 Easy maintenance of Plasma Display Power board output spec. Name Output Max Load Peak load 1.0A 2.0A 3.0A 2.0A Vfan 0.5A 0.6A 170V 290W -160V 0.1A Vaux 380V *Vs & Vxg check the barcode label of Module isplaying your vision!
  • Page 50 Easy maintenance of Plasma Display 14.Vertical noise line on whole screen ? No. This caused by Pixel Works IC on VIF. The only way is to replace VIF. isplaying your vision!
  • Page 51 Easy maintenance of Plasma Display Panel failure isplaying your vision!
  • Page 52 Easy maintenance of Plasma Display Panel W electrode line off. isplaying your vision!
  • Page 53 Easy maintenance of Plasma Display X and W electrodes line off. isplaying your vision!
  • Page 54 Easy maintenance of Plasma Display Panel lost gas. isplaying your vision!
  • Page 55 Easy maintenance of Plasma Display In principle that Panel failure can’t be repaired. So what could we do? Inform the retailer fax RMA to manufacture for replacement. isplaying your vision!
  • Page 56 Easy maintenance of Plasma Display FAQ (Frequently Asked Questions) 1. Power on the PDP set yet without any picture on the screen a. First check both ends of the power cable are plugged into the socket appropriately then make sure power switch being turned on, survey the red standby light is lamped, if the red standby light is not lamped it means maybe input power has some problem or the safety fuse of AC line filter is burned.
  • Page 57 Easy maintenance of Plasma Display sticking on the screen. When image sticking occurred, the only way to clear up the image sticking is press ”Full White” key, using full white image to burn in the screen till image sticking disappear. 4.
  • Page 58 6. There are some noise being found on the higher CATV channels Maybe the signal quality from cable station is too weak or no good, please inform the cable station to improve the signal quality. 7. The signal from DVD player can‘t output to the screen? Check the signal cables from DVD output to PDP input are connected appropriately and check the type of terminal (CVBS, S-Video or the component) then check whether PDP signal input select is correct or not.