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Changhong Electric PT4216, Service Manual, Page: 48 / 62

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Changhong Electric PT4216 Service Manual Download Page 48

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Summary of Contents for PT4216

Page 1: ...1 PDP TELEVISION SERVICE MANUAL Chassis NO PS08 Model No PT4216 Please read this manual carefully before service...

Page 2: ...rt Analysis on Signal Process Flow of PT4216 and key point test data 24 Part Typical troubleshooting process flowchart of PT4216 33 Part Spare part list 39 Part Factory mode setup and attention 40 Ann...

Page 3: ...put convenient to connect Y C video input from DVD output z 236 programs preset In TV condition capable to save 236 programs Ready for future rich programs z Multi format Capable to receive NTSC PAL S...

Page 4: ...ug and play z Little weight small dimension low power consumption 3 CBU Content 3 1 PDP Inside Drawing 1 2 3 4 5 6 No Name Front Cabinet Filter Glass PDP Panel Module Shelve Bar Down Cover Module etc...

Page 5: ...PCB module Number Parts Description 1 Main Board assembly It is the core of signal processing for PDP TV which takes responsibility of transforming outer signal into the uniform digital signal identi...

Page 6: ...iple DC power including 12VAU audio power amplifier 12V A6V D6V D3 3V 34V and 5VS standby power supply 5 K Board module It consists of 7 inductive buttons by which users can operate the TV freely 6 Po...

Page 7: ...13 U305 SM5302AS G ET High definition signal filter 14 U400 TDA8759HV 8 C1 Video signal A D converter 15 U5 TDA9178T N1 Video signal picture quality improvement 16 U600 MT46V2M32LG 4 Frame buffer 2 PD...

Page 8: ...p control 4 RB3 MCLP VPP Input voltage 5V when programming or reset input 5V 5 RC5 I O port POWER OFF1 input from GM1501 output inform PIC16F505 to do off operation 6 RC4 I O port ALARM input turn on...

Page 9: ...ature as below High quality image zoom function Analog RGB signal input interface Intelligent input signal mode auto identification Integrated high performance PLL output High reliable self adaptive D...

Page 10: ...A11 B5 B7 C7 D7 D11 DVI GND DVI ground Low bandwidth ADC port C13 LBADC 33 ADC3 3Vpower supply A12 B12 C12 LBADC_IN1 LBADC_IN3 ADC analog input channel D12 LBADC_RETURN Channel analog ground D13 LBAD...

Page 11: ...F16 AF19 AF23 AF11 A0 A3 A0 A3 B0 B3 B0 B3 Low voltage difference data input AD14 AD11 AE13 AE11 AC11 AF10 LVDS_SHIELD 5 LVDS_SHIELD 0 Low voltage difference protect output AE12 AF12 AF20 AE20 AC AC B...

Page 12: ...24 H26 J25 J26 R24 R26 P24 P26 N23 N26 FSDATA31 FSDATA0 Data input output port T24 T25 U25 U26 FSDQM3 FSDQM0 Data output mark Y26 Y25 FSBKSEL1 FSBKSEL0 Layer select address AA24 AA26 AB24 AB26 AC24 AC...

Page 13: ...utions from 480i and VGA to HDTV and XGA Triple 8 bit Analog to Digital Converter ADC Three independent I2C selectable analog video sources Auto detect to interlace scan video signal 1 8Vand 3 3Vsuppl...

Page 14: ...port A 11 116 130 132 VDDC Power supply port 12 117 159 CGND Ground 23 28 31 32 VPB0 VPB7 Video port B 35 36 39 44 VPC0 VPC7 Video port C 47 53 57 58 55 60 66 70 71 75 81 83 85 86 AGND Analog ground...

Page 15: ...45 151 157 VDDI Input digital supply voltage 166 PL PLL disable signal output 167 DE Data enable output 168 HS Horizon synchronization signal input 169 VS vertical synchronization signal input 170 CS...

Page 16: ...ol 19 FAULT A logic high output indicates thermal overload 20 35 PGND2 PGND1 Power Grounds high current 22 DGND Digital Ground 24 27 31 28 OUTP2 OUTM2 OUTP1 OUTM1 Bridged outputs 25 26 29 30 VDD2 VDD2...

Page 17: ...low a maximum of three devices to be used simultaneous FEATUES supply voltage analog 4 75V 5 25V digital 3 0 5 5V 2 system input multiplexer function switchable using IIC or MUXSEL input Filter bypass...

Page 18: ...SDA Digital supply 3 0 5 5V IIC data signal input output 4 SCL 5 Vss IIC clock signal input Digital ground 6 MUXSEL Input multiplexer switch control 7 ADS IIC slave address select three state input 8...

Page 19: ...ence voltage 2 2 8 Brief Introduction to SAA7115 The SAA7115 is a video capture device for various applications ranging from small screen products like e g digital set top boxes personal video recordi...

Page 20: ...ubaddr 11h and 12h RTS1 35 O real time status or sync information controlled by subaddr 11h and 12h 36 RTCO Real time control output 37 AMCLK Audio master clock output 39 ASCLK Audio serial clock outp...

Page 21: ...control gamma control and blue and black stretching All features are available for CVBS Y C and RGB YPBPR signals The mono intercarrier sound circuit has a selective FM PLL demodulator which can be sw...

Page 22: ...NCH right signal 38 DECSDEM decoupling sound demodulator 39 QSSO AMOUT AUDEEM QSS intercarrier output AM output deemphasis 41 PLLIF PLL filter 42 SIFAGC DVBAGC AGC sound IF internal external AGC for D...

Page 23: ...O1 V output for YUV interface 77 INSSW3 3rd RGB YPBPR insertion input 78 R PRIN3 3rd R input PR input 79 G YIN3 G input Y input 80 B PBIN3 3rd B input PB input 83 BCLIN beam current limiter input 85 R...

Page 24: ...ain board At this time standby CPU PIC16F505 begin to work and LED lamp indicates red After user gives key or remote on instruction the 7th pin of PIC16F505 sends PDP STB high level signal to control...

Page 25: ...ff 4 1 Main power form and power branch 4 1 1 5V ST power branch X P 9 1 5 5 t h p i n 5 V S T U 9 0 0 L M 1 1 1 7 3 3 X P 9 1 0 1 t h 3 t h p i n K b o a r d a s s e m b l y K b o a r d c o n n e c t...

Page 26: ...C11 B11pin U700 GM1501 C13pin U80129LV800BT 37 pin U700 GM1501 A2 B3 D3 E3pin U700GM1501 K17 U17 U11 L16 T16 T17 L11 K10 K16 T11 U16 U10 K11 K23pin 1 8V_CORE A3 A4pin 1 8V_ADC D6 D8 D9 D10 1 8V_DVI U...

Page 27: ...N G 4 1 5 A12V power branch XP900 5th pin SCOL SCOR audio output circuit power supply U5 TDA9178T 20th pin 12V_DC 12V_3A PDP_D12V U916 TA4808F 4 2 The Pin Voltage of regulator on Main Board position...

Page 28: ...10 XP936 PDP pannel Timing control signal of power board of Panel 8 XP900 Power board PDP D6V PDP D3 3V PDP D12V input 9 XP905 Power board PDP A6V PDP A12V PDP 12VAMP PDP VT33V input 12 XP922 AV outp...

Page 29: ...AW filter N U901 PIC16F505 Standby control CPU O U902 PCF8563 Real time clock counter M U306 FSAV330QSCX Select switcher L U302 24LC21A T SN EEPROM K U303 24LC21A T SN EEPROM 5 Key point waveform 5 1...

Page 30: ...f U5 the 4th pin of main tuner UT920 the 4th pin of sub tuner UT921 the 1th pin of XP926 is like this 5 4 RF input full color stripe signal the waveform of I C bus clock signal UOCIII_SDA the 99th pin...

Page 31: ...al the waveform of UOC vertical sync signal the 22th pin of U201 the 105th pin of U400 is like this 5 6 RF input gray ladder signal the waveform of the 18th pin of sub tuner UT921 the 8th pin of XP926...

Page 32: ...32 7 The 1KHz sound signal input the waveform of the 60th 61 th pin of U201 the 6th 8th pin of XP907 is like this...

Page 33: ...J171 on main board there is 3 3V power supply Check mainboard jack XP915 5 pin 5V power Check resistor RK2 light diode VDK1 Check K board iack XR900 11 pin 3 3V power Check standby circuit of power b...

Page 34: ...mal or not no 1 Check connector 2 Check PDP power module Check U901 U902 power supply and peripheral circuit No Check X700 14 318M crystal is normal or not Yes No Change X700 crystal Check U700 GM1501...

Page 35: ...35 three The red led lights turns to green color after power on but display black screen...

Page 36: ...veform of sync regulating circuit is normal or not No Check VGA jack input abnorma l Check power supply and peripheral circuit of sync regulating circuit are normal or not output abnormal No picture o...

Page 37: ...al or not check TDA8759 power and peripheral circuit change TDA8759 No check AV board connector check UOC3 AV I O is ok or not joint well check UOC3 and TDA9178 power bus input ok but output abnormal...

Page 38: ...ck UOC3 output signal check UOC3 output coupling circuit R219 R220 XP907 Yes check and change TA2024 normal check UOC3 input signal check 20th 30th pin SIF input TV check sound input other source chec...

Page 39: ...J JUJ6 690 041 4 4 Main board assembly Samsung V7 panel 8669000415J JUJ6 690 041 5 5 AV board assembly 8669300170J JUJ6 693 017 JUJ7 820 174 6 Inside power board assembly Panasonic M8 pannel 866980004...

Page 40: ...rol emitter 17 PDP panel 69222500425 MD 42M7 N S R 18 PDP panel 69222500426 MD 42M8AS N R S 19 PDP panel 50890040010 42 V7 4013 20 PDP panel 50890040000 S42SD YD07 21 PDP filter glass 31401040100 FG40...

Page 41: ...ex number and adjusting item is below Index Item name Item meanings Operating key remark 1 HWUC_BRI UocIII subbrightness V V adjust subbrightness 2 HWUC_SAT UocIII saturation V V adjust subsaturation...

Page 42: ...dex number to become green then press OK the color of index number turns red so you already selected corresponding volume adjusting item Adjust method Adjust it according to the operating key in above...

Page 43: ...tween light receiver of white balance to center place of PDP display screen is 15cm 3cm D Make sure that the environmental brightness is below 2cd m 2 White balance color temperature adjustment Before...

Page 44: ...44 Annex 1 Circuit schematic diagram of PT4216 Main board...

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Page 55: ...55 AV board...

Page 56: ...56 K board...

Page 57: ...57 Divide frequency board...

Page 58: ...58 Remote control receiving board...

Page 59: ...59 LG panel power board...

Page 60: ...60 PT4216 power amplifier board...

Page 61: ...61 Annex 2 Final assembly diagram of PT4216...

Page 62: ...62 Annex 3 Final wiring connection diagram of PT4216...

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