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Changhong Electric PT4216 Service Manual

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PDP TELEVISION

SERVICE MANUAL

PS08
Chassis NO.
Model No.
PT4216
Please read this manual carefully before service.
1

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Summary of Contents for Changhong Electric PT4216

  • Page 1: Service Manual

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

  • Page 2: Table Of Contents

    CONTENTS PartⅠ:PS08 Chassis Features and Circuit block diagram..………......3 PartⅡ:Introduction on main components functions of PT4216 ...……………………7 PartⅢ:Analysis on Signal Process Flow of PT4216 and key point test data ………..24 PartⅣ:Typical troubleshooting process flowchart of PT4216……......33 PartⅤ: Spare part list…………………………………………………………………...39 PartⅥ:Factory mode setup and attention…………………………………………40 Annex: 1、Circuit schematic diagram of PT4216……………………………………41...

  • Page 3: Partⅰ:ps08 Chassis Features And Circuit Block Diagram

    PartⅠ:PS08 Chassis Features and Circuit block diagram 1、 PT4216/PT4218 Panel Datas： PT4216/ PT4218 and PT5016 are all belong to PS08 chassis. The used panel parameter is below: PDP Panel Resolution 852×3(RGB)×480 Colors 16,777,216 Dot Pitch 1.095mm(H)×1.110mm(V) Brightness High brightness Contrast...
  • Page 4 is real plug and play. Little weight, small dimension, low power consumption 3、CBU Content 3.1 PDP Inside Drawing: Name Front Cabinet ① Filter Glass ② PDP Panel Module ③ Shelve Bar ④ Down Cover Module etc. ⑤ Back Cabinet ⑥...

  • Page 5: Main Board

    Remarks: This drawing is for references only, please see the main assembly diagram and wire-connecting diagram for details. ： Circuit block diagram PS08 chassis PDPD TV is mainly composed of regulator circuit、RF circuit、video processor circuit、Power Amplify circuit、Analog Video circuit、System Control circuit and Key Control circuit, block diagram of unit circuit is below: Panel k Panel Power Board...
  • Page 6 Remote Control It is composed of one indicator lamp, buzzer and one remote control receiving head, Receiving which enable Users operate the TV conveniently and know its current working status assembly simply with a remote control box. Indicator lamp indicates unit on/off status and buzz prompts validity of key operation.

  • Page 7: Partⅱ:introduction On Main Components Functions Of Pt4216

    PartⅡ:Introduction on main components functions of PT4216 1、 PT4216 main components and function NAME TYPE Function AV board assembly UT921 TMI4-C22P2RW Output sub-picture CVBS signal UT920 TAD5-C2IP1RW Output sound and video IF signal Main board assembly U901 PIC16F505 Standby control CPU...
  • Page 8 IF signal output(not connect) Band control Band control Not connect Not connect Auto gain control VEDIO CVBS signal output Power AUDIO Not connect 2.3、Standby control CPU（PIC16F505） Pin number Pin definition Pin function description Power VDD（+3.3V） RB5/OSC1/CLCKIN RB4/OSC2/CLCKOUT LED1 KEYPAD STB output, standby indicator lamp control RB3/MCLP/VPP Input voltage (+5V)when programming or reset input(+5V) I/O port: POWER OFF1 input, from GM1501 output, inform...
  • Page 9 2.4 GM1501 GM1501 is a kind of dual channels image and video processing chip, which is mainly used for LCD displays and TV integrated products. With the resolution of WUXGA, it not only supports PIP technology, but also include all IC function of picture snap, process and display clock control.
  • Page 10 Analog signal input port AVSYNC ADC vertical synchronization signal input AHSYNC ADC horizontal synchronization signal input VGA-SCL VGA lock input VGA-SDA VGA digital input Red analog signal input D1、D2 RED+、RED- Green pedestal synchronization signal Green analog signal input C1、C2 GREEN+、- Blue analog signal input B1、B2 BLUE+、BLUE-...
  • Page 11 Video Control Port VCLK Video pixels clock signal VHS_CSYNC Video horizonl synchronization signal input Video vertical synchronization signal input VODD Scan status input VDV (VSOG) Video data input VCLAMP Video clamp enable output A21,A22,A23,B21, VGRN7~ VGRN0 Green pedestal signal or Y signal input B22,C21,C22,D21 C17,C18,C19,A18 VRED7~ VRED0...
  • Page 12 RESETn Reset signal M3，M4 IR0，IR1 MSTR_SCL Master clock output signal MSTR_SDA Master data output/input signal EXTCLK External clock input Frame memory interface U24,U23 FSCLKp,FSCLKn Differential store clock output V24,V25 FSRAS,FSCAS Address output FSWE Write enable terminal FSCKE Read enable terminal FSVREF Reference voltage input FSVREFVSS...
  • Page 13 2.5． Brief Introduction of TDA8759： TDA8759 is a triple 8-bit video converter interface. Sample rate is up to 81 Mbps .The IC can convert analog RGB signal into a 24bit RGB digital signal o, or converts analog YUV or YCbCr signal into a YUV or RGB digital. The IC supports resolutions from 480i and VGA to HDTV and XGA.
  • Page 14 Pin Description： Name Description HREF Horizon reference output VCLK Video clock output 3,13,21,29, VDDO Video port output supply voltage 37,45,164 4,14,22,30 OGND Video port output ground 38,46,165 VPA0~VPA7 Video port A 7，8，9，10， 15，16，17，18 11,116,130,132 VDDC Power supply port 12,117,159 CGND Ground 23~28,31,32 VPB0~VPB7...
  • Page 15 65,64,63 G/Y1~G/Y3 Green/luminance analog input 74,73,72 SOG/Y1~SOG/Y3 Sync on green//luminance input REFR/Pr Red/red-chrominance channel reference input 80,79,78 R/Pr1~ R/Pr3 Red/red-chrominance channel analog input 89~92,97~101 TST0~TST17 Reserved for test 112,121,122, 124,125,160~163 Power-down control input Output enable signal input I²C bus address control signal input COAST PLL control signal input GAIN...
  • Page 16 OVERLOADB A logic low output indicates the input signal has overloaded the amplifier OAOUT1, OAOUT2 Input stage output pins. 10，14 11, 15 INV1, INV2 Single-ended inputs MUTE Mute control BIASCAP Input stage bias voltage SLEEP Sleep mode control FAULT A logic high output indicates thermal overload 20, 35 PGND2, PGND1...
  • Page 17 2.7．Brief Introduction to SM5302AS ： th - The SM5302AS is a 3-channel video buffer with built-in 5 order low pass filter. The cutoff frequency, signal input type, and output gain switching can be controlled using a IIC control bus, and the IIC slave address can be set by ADS(3-state input) to allow a maximum of three devices to be used simultaneous.
  • Page 18 ● IIC interface control: slave address:90h,92h or 94h(up to three devices can be used simultaneously,selected by ADS input); data transfer rate: fast mode(up to 400kbps) ● Cutoff frequency:4.8 to 43MHz variable SM5302AS Internal Diagram： Pin Description： Name Description REF1 Internal reference voltage 1 Digital supply(3.0~5.5V).
  • Page 19 GND3 Analog ground(CH-3) Out3B Video signal output(CH-3,for sag compensation) Out3A Video signal output(CH-3) VCC3 Analog supply(CH-3)(4.75 to 5.25V). Analog ground(CH-2) GND2 Out2B Video signal output(CH-2,for sag compensation) Out2A Video signal output(CH-2) VCC2 Analog supply(CH-2)(4.75 to 5.25V). GND1 Analog ground(CH-1, Vref) Out1B Video signal output(CH-1,for sag compensation) Out1A...
  • Page 20 43,51,58,68,75,83 Test Data Output for Boundary Scan Test Test Data Input for Boundary Scan Test (with internal pull-up) XTOUT crystal oscillator output signal, auxiliary signal XTALO 24.576 (32.11) MHz crystal oscillator output; not connected if XTALI is driven by an external single-ended oscillator. XTALI Input terminal for 24.576 (32.11) MHz crystal oscillator or connection of external oscillator with TTL compatible square wave clock signal.
  • Page 21 vertical reference I/O expansion-port: In ten bit video output mode: this signal represents the video bit 0. horizontal reference I/O expansion-port: In ten bit video output mode: this signal represents the video bit 1. XCLK clock I/O expansion port data qualifier I/O expansion port XRDY task flag or read signal from scaler, controlled by XRQT (subaddr.
  • Page 22 PH2LF phase-2 filter phase-1 filter PH1LF SECAM PLL decoupling SECPLL bandgap decoupling DECBG EWD/AVL East-West drive output or AVL capacitor VDRB vertical drive B output vertical drive A output VDRA VIFIN1 IF input 1 IF input 2 VIFIN2 reference current input IREF SIF input 1 / DVB input 1 SIFIN1/DVBIN1...
  • Page 23 VIN (R/PRIN2/CX) V-input for YUV interface U-input for YUV interface UIN (B/PBIN2) Y-input for YUV interface YIN (G/YIN2/CVBS-YX) Y-input for sync separator YSYNC Y-output (for YUV interface) YOUT UOUT (INSSW2) U-output for YUV interface V-output for YUV interface VOUT (SWO1) RGB / YP insertion input INSSW3...

  • Page 24: Partⅲ:analysis On Signal Process Flow Of Pt4216 And Key Point Test Data

    PartⅢ:Analysis on Signal Process Flow of PT4216 and key point test data This chapter mainly introduces receiving and process of picture and sound signal of PDP TV and system control procedure, supply system of unit. 1. Picture signal process Flow IF signal which is demodulated by main tuner is sent by AV board module into video decode chip UOC Ⅲ...
  • Page 25 mode” .At the moment ， examines DVI signal ceaselessly， so it can be awaken automatically in DVI mode. It is said that when DVI signal inputs, it can work normally from standby state 4、Power supply system： Power board has seven ways voltage output all together. They are 34V， 12V， 12VAU，A6V，D6V，D3.3V and 5V.
  • Page 26 4.1.3、VDD(3.3V) power branch +3.3V_DVI U700 GM1501 C6, C8, C9, C10, C11, B11 pin +3.3V_PLL U700 GM1501 G3, G4 crystal oscillator X700 G3, G4, J1, J3, H1, H3, G1, F2, F4 external connect capacitor U700 GM1501 +3.3V_LVDS AE17 pin +3.3V_LVDSA U700 GM1501 AC21, AC22, AD20 pin +3.3V_LVDSB U700 GM1501...
  • Page 27 X P 9 0 5 1 t h p i n U 3 0 9 （ 1 6 t h p i n ) , U 3 0 5 （ 1 8 t h , 2 2 t h , 2 6 t h p i n ）...
  • Page 28 Socket definition number name Connected object Function description XP915 Power board Standby power and on/off control XP907 Power amplified board Left and right channel sound output J171 Remote control board XP909 K board XP910 K board XP926 AV board XP927 AV board CN900 PDP pannel...
  • Page 29 U600 MT46V2M32LG-4 Frame buffer GM1601/GM1501-BD Video processor U700 SM5302AS-G-ET High definition signal filter U305 AM29LV800DT-70EC Flash，save TV control program U801 TDA9178T/N1 Video signal picture quality improvement K9352N SAW filter K202 K7262N SAW filter K201 PIC16F505 Standby control CPU U901 PCF8563 Real time clock counter U902 FSAV330QSCX...
  • Page 30 5.3、RF input full color stripe signal, the waveform of I²C bus clock signal UOCIII_SCL, the 98 pin of U201,the 11 pin of U5,the 4 pin of main tuner UT920, the 4 pin of sub tuner UT921,the 1 pin of XP926 is like this: 5.4、RF input full color stripe signal, the waveform of I²C bus clock signal UOCIII_SDA, the 99 pin of U201,the 14...
  • Page 31 5.5、 RF input full color stripe signal, the waveform of UOC vertical sync signal, the 22th pin of U201,the 105 pin of U400 is like this: 5.6、RF input gray ladder signal, the waveform of the 18 pin of sub tuner UT921,the 8 pin of XP926，...
  • Page 32 7、 The 1KHz sound signal input, the waveform of the 60 、 61 pin of U201, the 6 、 8 pin of XP907 is like this:...

  • Page 33: Partⅳ:typical Troubleshooting Process Flowchart Of Pt4216

    PartⅣ:Typical troubleshooting process flowchart of PT4216 one、red led does not light red led does not light Check K board Check mainboard jack XP915 iack XR900 11 pin Check if 6th,7th pin 5 pin 5V power 3.3V power of jack J171 on main board there is 3.3V power...
  • Page 34 two、The red led lights，but doesn’t turn to yellow after power on and black display Power on, check XP915 Check U901, Check U901,U902 3th pin PDP-STB signal is U902 output power supply and high level 3.3V or not? voltage is normal peripheral circuit or not Check X700...
  • Page 35 three、The red led lights，turns to green color after power on but display black screen...
  • Page 36 four、no picture： Check if there is anyone normal picture to display when source switches Other part is on next page No picture only VGA No picture only or YPbPr mode Check U310 input and output sync. Check GM1501 L4? waveform of sync L3 pin horizon and regulating circuit output...
  • Page 37 if there is one state to display when switch the source TV, AV, S-VIDEO, only AV no no picture only S- only TV no picture all no picture picture video check U400 TDA8759 horizon check UOC3 31th,41th pin check AV board check S-video and vertical sync.
  • Page 38 Five、no sound or low sound volume no sound or low sound volume check XP302、 XP303 connection of power amplifier board；sound box connection line check XP302、 XP303 output signal check TA2024 check TA2024 input check and change normal normal power、mute signal TA2024 control check UOC3 output coupling...

  • Page 39: Partⅴ: Spare Part List

    This list is only for reference, if change the parameters of those spare list ,we do not notice in advance. The exact type or specification is confirmed by newest information provided by corporation. PT4216 name Material number Assembly number PCB number...
  • Page 40 13、 K board assembly 8669400270J JUJ6.694.027 JUJ7.820.159 Remote control board 14、 assembly 8669400280J JUJ6.694.028 JUJ7.820.160 Divide frequency 15、 board assembly 8669100120J JUJ6.691.012 JUJ7.820.175 Remote control 16、 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、...

  • Page 41: Partⅵ:factory Mode Setup And Attention

    PartⅥ:Factory mode setup and attention 1.Enter factory menu （1）Enter child lock of main menu in TV mode, press “OK”, the password input box will appear; （2）Use remote control to input the follows in order:7,red key,9,blue key, then you can enter factory mode menu. After entering factory mode menu, sign of the factory menu M will appear.
  • Page 42 ClearEEProm initialize EEPRom Initialize storage V+/ok date D Mode Enter design mode Can adjust all parameter of V+/ok design mode DPF preset V+/V- 1 represent preset BBE_CONT BBE gain set V+/V- adjust BBE gain BBE_PROC BBE gain set V+/V- adjust BBE gain Newcom Newcom set V+/V-...
  • Page 43 HD signal source one suit ②Debug（adjust in TV、YPbPr and PC condition respectively） Set the channel in C-3 under TV mode, then do AutoColor. Input full color stripe signal in YPBPR and do AutoColor. Input window signal in PC, the window is white, surround is black signal. The result will appear on screen after AutoColor adjustment, make the adjustment results of Rgain、Ggain and Bgain close to 0×80 in TV condition, if the difference is too great, adjust the value of HWUC_CON...

  • Page 44: Annex 1、Circuit Schematic Diagram Of Pt4216

    Annex 1、Circuit schematic diagram of PT4216 Main board...
  • Page 55 AV board...
  • Page 56 K board...
  • Page 57 Divide frequency board...
  • Page 58 Remote control receiving board...
  • Page 59 LG panel power board...
  • Page 60 PT4216 power amplifier board...

  • Page 61: Final Assembly Diagram Of Pt4216

    Annex 2:Final assembly diagram of PT4216...
  • Page 62 Annex 3:Final wiring connection diagram of PT4216...

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