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Sanyo PDP-50XR7, Руководство по обслуживанию

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3. TDA4470 

The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF(VIF/SIF) signal 
processing in TV/VCR and multimedia applications. The circuit processed all TV video IF signals 
with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, 
FM/NICAM sound IF signals. 

 

 

Содержание PDP-50XR7

Страница 1: ...PDP TV SERVICE MANUAL PDP 50XR7 FILE NO ...

Страница 2: ...gnment instruction Method of software upgrading Working principle analysis Block diagram IC block diagram Wiring diagram Troubleshooting guide Schematic diagram APPENDIX A Assembly list APPENDIX B Exploded View 1 3 6 12 13 14 19 20 23 ...

Страница 3: ... as areas in the vicinity of water bath room laundry water chute of kitchen sources of fire heat 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 must be cut off immediately Keep the module as it is and do not move anything on the module Otherwise it migh...

Страница 4: ... below Temperature Scope for operation 0 50centigrade Scope for storage 15 60centigrade Humidity Scope for operation 20 80 Scope for storage 20 80 1 15 If a fixed picture is displayed for a long time difference in its brightness and color may occur compared with movable pictures But it doesn t show any problem and the reason is that there is reduced density of fluorescent powder in the former On t...

Страница 5: ...erature etc Please handle it carefully Alignment instructions 1 Test equipment PM5518 video signal generator VG 849 VGA signal generator CA210 white balancer 2 Alignment flow chart The alignment flow chart is shown as fig 1 Fig 1 adjustment flow chart 3 Unit adjustments Connect all the boards according to wiring diagram connect with power and observe the display Method for entering factory menu pr...

Страница 6: ...justment Disconnect J401 B face input 38 9MHz PAL signal of 80dB from J401 near the socket Adjust L404 to value 0 9V of TP402 Enter factory menu adjust TDA4470 from BG to LL input 33 9MHz SECAM signal of 80dB adjust RP402 to value 0 9V of TP402 then wed J401 3 2 2 IF AGC adjustment Input 184 25MHz RF signal of 60DB from RF terminal adjust RP401 to value 4V of TP404 and there should be no obvious s...

Страница 7: ...ay when upgrading it needs to web J1 of 01S board Please disconnect J1 again after upgrading 5 Performance check 5 1 TV function Enter searching menu auto search connect RF TV terminal with central signal source and check if the picture is normal if there are channels be skipped Check TXT and parental control 5 2 AV S YpbPr terminals Input AV S YPbPr YCbCr HD signal check if it is normal 5 3 VGA t...

Страница 8: ...e 15 pins the serial cable connects the PC and the upgrade instrument the VGA cable connects the TV and the upgrade instrument 2 The steps for upgrading software 1 Please confirm that the connection wires and the upgrade instrument are connected well before the software written and then power on the TV 2 Double click the icon ISP_TOOL to open it 3 Press Connect to connect TV if the connection is d...

Страница 9: ...ection wires and check if ISP item of the factory menu is set to 1 if not please set it to 1 4 After connection is done it needs to read the Binary document Press Read as shown below 5 Search the document needed to write in the Read check box ...

Страница 10: ...8 6 Select the document then the window will appear as shown below Select ...

Страница 11: ...9 7 Press Auto to select the writing function Select the items shown in the picture above a Read File ...

Страница 12: ...se Device e File Area 8 Press Run to begin the writing program wait till the blue bar is complete After writing it will display OK If there is error appeared shown as below press Run again to rewrite the program till it is success ...

Страница 13: ... writing process Note2 the writing speed can be adjusted as shown below Select Config then adjust Speed BAR the value is bigger the speed is faster But it is easier to appear error when increase the speed so it need to select a suitable speed according the PC Step 1 Step 2 ...

Страница 14: ...them via audio switch N302 HEF4052BT selection after also sent to MST9E88L The main IC NS4 MST9E88L is a high performance and fully integrated IC which can realize HDMI processing video demodulating video switch selection A D and D A conversion interlace de interlace processing modes conversion OSD and low voltage differential output ect And it also has functions of audio selection processing and ...

Страница 15: ... AV L R SCART1 V OUT TV IIS SCART2 L R OUT SCART2 V OUT CVBS SCART1 L R OUT TV L R HDTV SW PI5V330 LCD TV CONTROLLER MST9X88LD AUDIO SW HEF4052 HP AMP BH3547F AUDIO AMP MP7722 HEAD PHONE EDID 24C02 EEPROM FLASH DDR PANEL SPEAKER EDID 24C02 D A CS4334 IF AMP TDA4470 HDCP KEY POWER MEG ATMEG8L AUDIO SW HEF4052 2 AMP 2 AMP SAW Block diagram ...

Страница 16: ... video and audio decoder a video de interlacer a scaling engine the MStarACE 3 color engine an on screen display controller an 8 bit MCU and a built in output panel interface With external frame buffer 3 D video decoding and processing are fulfilled for high quality TV applications To further reduce system costs the MST9E88L also integrates intelligent power management control capability for green...

Страница 17: ...up Shutdown pop elimination Short circuit protection Mute Standby The MP7722 utilizes a single ended output structure capable of delivering 2 x 20W into 4Ωspeakers MPS Class D Audio Amplifiers exhibit the high fidelity of a Class A B amplifier at efficiencies greater than 90 The circuit is based on the MPS proprietary variable frequency topology that delivers low distortion fast response time and ...

Страница 18: ...16 ...

Страница 19: ... for multi standard video sound IF VIF SIF signal processing in TV VCR and multimedia applications The circuit processed all TV video IF signals with negative modulation e g B G standard positive modulation e g L standard and the AM FM NICAM sound IF signals ...

Страница 20: ...18 ...

Страница 21: ...IF adjust Wiring diagram 19 ...

Страница 22: ...ly board Press POWER button in the unit or sensor control and check the indicator Check if the PIN27 of X304 in 01 board is high level Check if the PIN11 of X303 in main board is high level Check power supply board Check if Va Vs of X5203 X5204 on the power board is normal yes no no red blue no yes Replace 01 board no yes Replace N102 Check the panel no yes Check the power board ...

Страница 23: ...ff the TV turn on again display picture Adjust main board again Which is no signal of channels Replace main board Check if 1VPP signal and noise wave of X405 PIN 8 in the TV board Check if output IF signal of TUNER1 pin 11 is normal Replace TUNER1 Check N404 and its periphery no yes yes HDMI VGA YPRPB TV yes no no no yes Does display OSD menu in screen when press menu button yes no yes no ...

Страница 24: ... 8 13 and 18 voltage of N405 is normal Check power supply Check PIN3 and PIN7 output wave of N405 Check PIN62 wave of NS4 Check PIN11 wave of TUNER1 Replace TUNER1 Replace N405 Replace NS4 Replace Z406 no yes no yes yes yes no no ...

Страница 25: ...page 1 of 4 ...

Страница 26: ...page 2 of 4 ...

Страница 27: ...page 3of 4 ...

Страница 28: ...page 4 of 4 ...

Страница 29: ...interface connector ...

Страница 30: ...KEY board ...

Страница 31: ...IR receiver board ...

Страница 32: ...TV board ...

Страница 33: ......

Страница 34: ......

Страница 35: ...10 NS4 MST9E88L 5270988002 Indicator light board XI6LT0251410 Interface connection board XI6HU0512910 Key board XI6HU0530510 Power filter board XI6FK0105110 Power board XI6HU0532010 Remote control XI6010Y03507 Panel XI5205503204 APPENDIX A Main assembly PDP 50XR7 RC Y35 0F PDP50X4P MAIN COMPONENT AND IT S NO ...

Страница 36: ......

Страница 37: ...DESCRIPTION 1 Indicator light board 2 Front cabinet 3 Key board 4 Panel 5 Stand 6 Speaker 7 Interface connection board 8 Main board 9 Back cabinet 10 Analog board 11 Power filter board 12 Power board 13 User manual 14 Remote control ...

Страница 38: ... Stand 1 6 XI6170712020 Speaker 1 7 XI6HU0512910 Interface connection board 1 8 XI6HU0580110 Main board 1 9 XI5HS31RI010 Back cabinet 1 10 XI6HU0515310 Analog board 1 11 XI6FK0105110 Power filter board 1 12 XI6HU0532010 Power board 1 13 XI594403175A User manual 1 14 XI6010Y03507 Remote control 1 Only the parts in above list are used for repairing Other parts except the above parts can t be supplie...

Страница 39: ...Apr 2008 ...

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