Toshiba TCL M28LG2 Service Manual
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Toshiba TCL M28LG2 Service Manual

Toshiba TCL M28LG2 Service Manual

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SERVICE MANUAL

1、 Caution.................................................................................2
2、 Specification of Chassis ............................................................5
3、Specification of IC..................................................................12
4、BOM list ...........................................................................24
5、Alignment Procedure..................... ... ... .............................. 38
6、Block Diagram....................................... ..............................50
7、Schematic Diagram........................... ......... ...........................51
8、PCB Layout.................................... .......................................52
9、Trouble Shooting..................... ............ ............... ..................53
10、Explode View Diagram..................... .......................................56
This manual is the latest at the time of printing, and does not
include the modification which may be made after the printing, by
the constant improvement of product
TCL
TCL M28L(G)2 Chassis

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Summary of Contents for Toshiba TCL M28LG2

  • Page 1: Table Of Contents

    SERVICE MANUAL TCL M28L(G)2 Chassis 1、 Caution………………………………………………………………………2 2、 Specification of Chassis ……………………………………………………5 3、Specification of IC…………………………………………………………12 4、BOM list …………………………………………………………………24 5、Alignment Procedure………………… … … ………………………… 38 6、Block Diagram………………………………… …………………………50 7、Schematic Diagram……………………… ……… ………………………51 8、PCB Layout……………………………… …………………………………52 9、Trouble Shooting………………… ………… …………… ………………53 10、Explode View Diagram………………… …………………………………56 This manual is the latest at the time of printing, and does not include the modification which may be made after the printing, by the constant improvement of product...

  • Page 2: Caution

    1、 Caution Use of controls, adjustments or procedures other than those specified herein may result in hazardous radiation exposure. CA UTION: TO REDUCE THE RISK OF CAUTION ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE RISK RISK OF ELECTRIC PARTS INSIDE.

  • Page 3: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS CAUTION: Read all of these instructions. Save these instructions for later use. Follow all Warnings and Instructions marked on the audio equipment. 1. Read Instructions- All the safety and operating instructions should be read before the product is operated. 2.
  • Page 4 PROTECTION AND LOCATION OF YOUR SET Do not use this television set near water ... for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, etc. Never expose the set to rain or water. If the set has been exposed to rain or water, unplug the set from the wall outlet and refer servicing to qualified service personnel.

  • Page 5: Specification Of Chassis

    2、 Specification of Chassis PFS (Product Functional Specification) Date: ProductView..: Report by....: Linda Wen M28L( G 2) Specs / Products MasterData Customer Id Version BOM No 04-D276BH-SA60 Brand Reception -Tuning - presets/channels -Tuning - technolo gy -Tuning - Indication -Freq Bands UVSH Full-Cable -IF Freq...
  • Page 6 PFS (Product Functional Specification) Date: ProductView..: M28L(G2) Report by....: Linda Wen Specs / Products Picture - Display -Display Type DV - CRT - Normal Flat DV-CRT-Pure Flat DV - CRT - Super Flat -Screen Format Expand 4:3 16:9 -Size(Visual)" - size/vis. cm 14(13V) - 37/34 cm 21(20V) - 55/51cm 25(00v) - 00/00cm...
  • Page 7 PFS (Product Functional Specification) Date: ProductView..: M28L(G2) Report by....: Linda Wen Specs / Products -Speakers used Normal Range Full Range User Interface -Interface Name Full interface -Voice Control -Menu Cursor Control -Menu Colours -Menu Languages Arabic Chinese - Simplified Chinese - Traditional English Russian Malay...
  • Page 8 PFS (Product Functional Specification) Date: ProductView..: M28L(G2) Report by....: Linda Wen Specs / Products -Indicators - front RC Recvd LED SB LED -Numb of Loc Cont (incl Mains) -Number of Ind. (incl Mains) -Local Controls (Old) Remote Control -Remote Control - scope -Remote Control - type Standard -Remote Control - typenr...
  • Page 9 PFS (Product Functional Specification) Date: ProductView..: M28L(G2) Report by....: Linda Wen Specs / Products -Headphone Out Mini-Jack 3.5mm -Cinch A/V in -Cinch A/V out Connectors Top -In Cinch (CVBS + St) -Headphone Out Connectors Mechanical -Headphone -Cinch A/V in/out -Cinch Component -Cinch Y/C Styling -Cabinet Name...
  • Page 10 PFS (Product Functional Specification) Date: ProductView..: M28L(G2) Report by....: Linda Wen Specs / Products Warning label Warranty Card -Languages DFU Arabic English Local Integration Malay Thai -Cables Supplied -Antenna Supplied -Stand Supplied -Aux Equipm Supplied Batteries for RC (2 x AA) Miscellaneous -Approbation -Tests...
  • Page 11 PFS (Product Functional Specification) Date: ProductView..: M28L(G2) Report by....: Linda Wen Specs / Products -XX(Radio Antenna in) -Non Volatile Memory -In Y/C + Cinch(CVBS+Mo) Version of deck Page 7...

  • Page 12: Specification Of Ic

    3、Specification of IC Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Block Diagram P61/LED1/ADC8bit P63/LED2 P60/ADC8bit P30/Int3/RXIN P53/ADC8bit/TC1/Int2 P31/Int4/TC3 uP DVss P20/Int5/Stop Reset P40/PWM14bit P50/PWM7bit/TC2/Int0 P51/SCL TEST P52/SDA uP DVDD 5V uP VVss uP AVdd 5V TV DEF GND uP MPAGND TV Dig GND Hout Bout HAFC 1...
  • Page 13 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Basic Structure 1. Internal Connections TMPA8873 has two pieces of IC chip in one package, using Multi-Chip-Package (MCP) technology. One is a micro controller (MCU) and the other one is a signal processor (SP) for a color TV. There are some internal connections between these two ICs for handling below signals.
  • Page 14 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative TERMINAL INTERFACE MCU BLOCK Pin Name Function Interface Circuit (/KWU5) (Input) Key on wake up input (AIN5) (Input) A/D converter analog input (LED1) (Output) LED output (/KWU4) (Input) Key on wake up input (AIN4) (Input) A/D converter analog input (/KWU0)
  • Page 15 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Pin Name Function Interface Circuit Xout Output X’tal connecting pins Input TEST Input Test pin for out-going test Power up DVdd Supply Supply 5V Power ⎯ up VVss GND for Slicer circuit Supply Power ⎯...
  • Page 16 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Pin Name Function Interface Circuit (SCL) (I/O) IIC bus serial clock input / output SIO serial data input (SI1) (Input) (/PWM8) (Output) 7-bit D/A conversion (PWM) output (TC2) (Input) Timer/Counter input (INT0) (Input) External interrupt input 14/12-bit D/A conversion (PWM) (/PWM0) (Output)
  • Page 17 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Pin Name Function Interface Circuit External interrupt input (INT3) (Input) Remote control signal (RXIN) (Input) preprocessor input (LED2) (Output) LED output 2006/05/25...
  • Page 18 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative SIGNAL PROCESSOR BLOCK Pin Name Function Interface Circuit I/O Signal TV DEF GND terminal for TV DEF ⎯ ⎯ AGND block. FBP in Input terminal for FBP. 200Ω 10kΩ Output terminal for 50Ω H out Horizontal driving pulse.
  • Page 19 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Pin Name Function Interface Circuit I/O Signal 1.5kΩ Y in Input terminal for Y signal. 1.5kΩ 11kΩ 5kΩ Cr in Input terminal for Cr signal. 5kΩ 35kΩ Input terminal for Audio Ext Au1 signal 1. 1.5kΩ...
  • Page 20 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Pin Name Function Interface Circuit I/O Signal Output terminal 1 for Audio Au out 1 signal. Output terminal 2 for Audio Au out 2 signal. Output terminal for detected TV out PIF signal. 1bit DAC Output terminal for 1bit /SIF out DAC or detected SIF signal.
  • Page 21 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Pin Name Function Interface Circuit I/O Signal Terminal to be connected 5kΩ Reg Fil capacitor for stabilizing 5kΩ internal bias. Output terminal for External AUDIO audio signal or TV audio Monitor out signal selected by BUS (Audio SW).
  • Page 22 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Pin Name Function Interface Circuit I/O Signal Vcc terminal for Y/C circuit. ⎯ ⎯ YC Vcc 5V Supply 5V. Output terminal for Sync pulse. A pull up resister is required 5kΩ Sync out because of its open collector output.
  • Page 23 Confidential TMPA8873CxBNG Tentative Tentative Tentative Tentative Microcontrollers Descriptions (MROM version: TMPA8873CMBNG /CPBNG /CRBNG /CSBNG) TV signal processor interface P64 to P67 P70, 71 P57 P54 P34, 35 R, G, B, Display Character Jitter Memory Y/BL Elimination CSOUT Power Supply up AV Ring On-screen display circuit Oscillator...

  • Page 24: Bom List

    4、BOM LIST PART NO. SEPC SINGLE LOCATION UNIT 11-0BC337-0BX TRANSISTOR (NPN) BC337-40 1 Q1501 13-00AS12-13B IC AS1213B 1 IC1501 14-IRE05B-XX0 IR EMITTING DIODE TSAL6200 1 D1501 18-CB0221-JNX RES. C.F. 220 OHM 1/6W +/-5% 1 R1503 18-CB0229-JNX RES. C.F. 2.2 OHM 1/6W +/-5% 1 R1501 25-HBB479-M1X CAP.
  • Page 25 59-312160-000 SPEAKER RUBBER CUSHION 62-216340-0UN TCL62-216340-0UN= BLOCK R=N 62-265160-0HA POWER SW. ADAPTOR 62-406210-0UN TRACK 63-W30080-AB4G S/T SCREW W 3 X 8 AB 2 MTG LENS & F. CAB. 63-W30100-AB4G S/T SCREW W 3 X 10 AB 2 MTG POWER PCB MTG SIDE AV 63-W30120-AB4G S/T SCREW W 3 X 12 AB BRACKET;MTG SPK...
  • Page 26 18-EF0399-JGX RES. FUSE 3.9 OHM 1W +/-5% 2 R407;R407A 18-EF0478-JGX RES. FUS. 0.47 OHM 1W +/-5% 1 R403 18-FF0100-JGX RES. M.O. 10 OHM 1W +/-5% 1 R402 18-FF0123-JGX RES. M.O. 12K OHM 1W +/-5% 1 R408 18-FG0153-JHX RES. M.O. 15K OHM 2W +/-5% 1 R404 25-BDA102-M1X CAP.
  • Page 27 TCL10-GRU3ZX-FBX= DIODE GRU3ZX 10-GRU3ZX-FBX 1 D830 11-SD2012-0CX TRANSISTOR 2SD2012 1 Q843 11-SK2645-0AX TRANSISTOR 2SK2645-01MR (POWER 1 Q815 13-0HPC92-2CP PHOTO COUPLER HPC922-C 1 IC802 TCL13-TEA150-6PP= IC TEA1506P 13-TEA150-6PP 1 IC801 18-FG0683-JHX RES. M.O. 68K OHM 2W +/-5% 1 R810 18-KF0825-JHX RES. GLASS GLAZE 8.2M OHM 1W 1 R829 RES.WIRE WOUND 0.08 OHM 2W +/- 18-RG0088-JHX...
  • Page 28 TCL07-389FI5-NA3G= TUNER 07-389FI5-NA3G 1 TU101 FSBP05P-3-E R=N 13-T11M28-05M01 MCU TMPA8873CSANG 1 IC201 METAL FILM FIXED RESISTOR 1WS 18-DF0334-JGX1 1 R804 330KΩ 18-EF0109-JGX RES. FUS. 1 OHM 1W +/-5% (LS) 1 R843 TCL18-FF0122-JGX= RES. M.O. 18-FF0122-JGX 1 R411 1.2K OHM 1W 18-FF0129-JGX RES.
  • Page 29 P1001 FOR KEY.BD 46-33079W-03XG PIN BASE *3 TJC3-3A P1003 FROM P1003 TO IR.BD 46-28150H-03XG HS 3P24 F/W 140 TJC3-3Y/SCN-3Y P1001 46-33079W-02XG PIN BASE *2 TJC3-2A 1 P1006反丝印插 FROM P1005 反丝印插 46-35148H-02XG HS 2P24 200 TJC3-2Y/SCN-2Y TO SW.BD P001 FROM P1004 反丝印插 46-35148H-02XG HS 2P24 200 TJC3-2Y/SCN-2Y TO M.BD P001...
  • Page 30 10-79C6V2-DBX DIODE ZENER 6V2 1/2W 5% 2 D404;D207 11-SA1015-YBX TRANSISTOR ST2SA1015Y (PNP) 3 Q210;Q005;Q003 Q905;Q211;Q209;Q903;Q 11-SC1815-YBX TRANSISTOR 2SC1815-Y (NPN) 208;Q097;Q095;Q002 11-SC1815-YBX TRANSISTOR 2SC1815-Y (NPN) 2 Q093;Q904 11-SC2235-YBX TRANSISTOR 2SC2235Y 1 Q401 11-SC3779-DBX TRANSISTOR 2SC3779D (RF AMPL) 1 Q101 18-CB0101-JNX RES. C.F. 100 OHM 1/6W +/-5% 4 J105;J103;R047;R001A PC R961;R042;R116;R941;R 18-CB0102-JNX...
  • Page 31 18-CB0752-JNX RES. C.F. 7.5K OHM 1/6W +/-5% 1 R940 18-CB0820-JNX RES. C.F. 82 OHM 1/6W +/-5% 2 R906;R914 18-CB0821-JNX RES. C.F. 820 OHM 1/6W +/-5% 1 R118 18-CB0822-JNX RES. C.F. 8.2K OHM 1/6W +/-5% 1 R237 18-CD0109-JNX RES. C.F. 1 OHM 1/4W +/-5% 1 R027 TCL18-CD0229-JNX= RES.
  • Page 32 26-EBP152-KBS CAP. CER 1500PF 50V +/-10% 1 C229 26-EBP222-KBS CAP. CER 2.2 NF 50V +/-10% 1 C213 TCL26-EBP270-JCS= CAP. CER 27 26-EBP270-JCS 1 C011 PF 50V +/- 26-EBP332-KBS CAP. CER 3300 PF 50V +/-10% 1 C237 26-EBP390-JCS CAP. CER 39PF 50V +/-5% 2 C021;C022 26-EBP471-JCS CAP.
  • Page 33 41-WJ0145-B00 WIREBAREJUMPER14.5MM 3 J228;J221;J222 J411;J402;J225;J019;J 41-WJ0150-B00 WIREBAREJUMPER15MM 018;J017 41-WJ0155-B00 WIRE BARE JUMPER 15.5MM 4 JP103;J234;J233;J232 PC 41-WJ0160-B00 WIREBAREJUMPER16MM 4 J227;J204;J231;J203 41-WJ0175-B00 WIREBAREJUMPER17.5MM 1 J412 FOR Q402(C);"FOR 66-343730-0B0 HOLLOW RIVET 1.6MMX3.0MMX3.2MM C402,C421";FOR L411 66-343730-0B0 HOLLOW RIVET 1.6MMX3.0MMX3.2MM 3 FOR T402(2,6,10) D1101;D1102;D1106;D11 10-1N4148-ABX DIODE 1N4148 (SWITCHING) 08;D1110...
  • Page 34 TCL11-C144ES-0BX= TRANSISTOR 11-C144ES-0BX 1 Q1007 PDTC144ES ( Q1006;Q1005;Q1004;Q10 11-SC1815-YBX TRANSISTOR 2SC1815-Y (NPN) 03;Q1002;Q1001 18-CB0102-JNX RES. C.F. 1K OHM 1/6W +/-5% 1 R1012 R1010;R1009;R1011;R10 18-CB0103-JNX RES. C.F. 10K OHM 1/6W +/-5% 06;R1007;R1008 18-CB0152-JNX RES. C.F. 1.5K OHM 1/6W +/-5% 1 R1001 18-CB0182-JNX RES.
  • Page 35 TCL18-CB0394-JNX= RES. C.F. 18-CB0394-JNX 1 R822 390K OHM 1/6 18-CB0471-JNX RES. C.F. 470 OHM 1/6W +/-5% 1 R821 CARBON RES. C.F. 4.7K OHM 1/6W 18-CB0472-JNX 1 R836 +/-5% 18-CB0473-JNX RES. C.F. 47K OHM 1/6W +/-5% 1 R841 18-CB0623-JNX RES. C.F. 62K OHM 1/6W +/-5% 1 R842 18-CB0683-JNX RES.
  • Page 36 66-343730-0B0 HOLLOW RIVET 1.6MMX3.0MMX3.2MM T803(1,8,9,16);FOR RT801;FOR C835 HOLLOW RIVET 66-343740-0B0 4 FOR C806,P803 (2.3MMX4.0MMX3.5MM) 10-1N4148-ABX DIODE 1N4148 (SWITCHING) 2 D626;D625 11-SA1015-YBX TRANSISTOR ST2SA1015Y (PNP) 1 Q625 18-CB0103-JNX RES. C.F. 10K OHM 1/6W +/-5% 4 R608;R607;R604;R603 18-CB0223-JNX RES. C.F. 22K OHM 1/6W +/-5% 2 R624;R625 CARBON RES.
  • Page 37 TCL41-WJ0050-B00= WIRE BARE FOR Q508 (B - E);FOR 41-WJ0050-B00 JUMPER 5MM R Q506 (B - E) TCL41-WJ0050-B00= WIRE BARE 41-WJ0050-B00 1 FOR Q504 (B - E) JUMPER 5MM R 41-WJ0075-B00 WIREBAREJUMPER7.5MM 3 J505;J503;J502 41-WJ0100-B00 WIREBAREJUMPER10MM 2 J504;J501 18-CB0101-JNX RES. C.F. 100 OHM 1/6W +/-5% 2 R915;R916 18-CB0123-JNX RES.

  • Page 38: Alignment Procedure

    5、Alignment Procedure Flowchart chart of alignment procedure for M28L(G2) chassis: B+ adjustment Electrical RF AGC properties adjustment checking for chassis Sub-brightness White balance Aging Adjustment of Sub-color & Adjustment Adjustment screen voltage Sub-tint and focus adjustment Pincushion Screen center Screen center QC checking and screen &...
  • Page 39 ) Adjustment of Sub-contrast, Sub-tint and Sub-color for NSTC and PAL signal. 1. Enter D-mode, and connect the probe of Oscilloscope to the conjunction between R201 and P201 (B-out). 2. Apply the Grey-scale/Color-bar (NTSC signal) to the AV input, in STANDARD status. 3.
  • Page 40 VII) Adjustment of Picture Geometry (PAL) 1. Apply the crosshatch pattern (PAL signal) to the RF input, in STANDARD status. 2. Select HPOS to adjust the Horizontal center. 3. Select VP50 to adjust the Vertical center. 4. Select HIT to adjust the Vertical amplitude. 5.
  • Page 41 ITEM Description Initial GROUP1 KEY 0 R CUT OFF G CUT OFF B CUT OFF G DRIVE B DRIVE DVD U level adjustment 0: (-22mV, Input DC) 8: 0mV DVD V level adjustment F: (19mV, 2.75mV/dev) Bits 4-7 Don’t use GROUP2 KEY 1 HPOS/...
  • Page 42 ASSH ASYMMETRY-SHARPNESS SHPX SHARP MAX.(difference from center) SHPN SHARP MIN.(difference from center) GROUP 6 KEY 6 OPTION DATA D mode key 0: No use 1 :use 0:normal 1: mute sound when no sync in TV 0:NORMAL 1: mute video during change channel au gain 0:50khz 1: 25khz when no sync 1: AFT 0: no AFT AV change 1: mute 0: no mute sound...
  • Page 43 BG system enable I system enable DK system enable M system enable VIDEO2 enable video3 enable YUV enable Thailand Dual language 0:Disable 1:Enable MUTT standby -->wake time STAT contrast up timer after standby off GROUP 7 KEY 7 RF AGC RF AGC SECAM B-Y BLACK ADJUST SECAM R-Y BLACK ADJUST...
  • Page 44 ABLpoint setup DCBS VIDEO DATA SETUP Y GAMMA BLACK STRETCH OSD LEVEL V AGC SELECT V AGC reference, 0:depends on YC Vcc 1:Depends on integrated regulator GROUP 14 NOTE- BOOK OSD1 OSD Horizontal Position(volume bar, Picture bar, Half blue panel OSD) OSDF1 OSD PLL DATA(volume bar, Picture bar, Half blue panel OSD)
  • Page 45 10: Mute 11: Mute Don’t use 0: Off H SBLK 1: On, 92%(FBP BLK off, then internal BLK ON) 00: Internal BPF mode 01: Not Use FM BPF 10: Not Use 11: External BPF mode VCD1 0x01 00: 2.10 Vp-p PIF Detected 01: 2.20 Vp-p Level...
  • Page 46 0: Sound Trap Off 0 – 3 S-Trap f0 for DK 1: f0 tuning min STDK 0x08 F: f0 tuning max 4 - 7 Don’t use 0: Sound Trap Off 0 – 3 S-Trap f0 for I 1: f0 tuning min 0x08 F: f0 tuning max 4 - 7...
  • Page 47 Group Key FM Items Description Default Counter for non-weak signal NDTC 0 - 7 0x05 detection Counter for weak signal NDTCT 0 -7 0x05 detection Items Bits Description Default 00: SHARP 01: TCL/PHILIPS 0 - 1 Tuner Select 10: ALPS 11: SHARP 2 - 3 Don’t use...
  • Page 48 1: “-“ subb operation Sign bit 0: “+” add operation Available offset 0 - 6 value for BCUT of CBCUT Cool 1: “-“ subb operation Sign bit 0: “+” add operation Available offset 0 -7 value for GDRV of CGDRV Cool 1: “-“...
  • Page 49 Window pulse for H-Lock detection 0: Normal for Searching & 1: Narrow Tuning 0x00 H-Lock detection mode for 0: H Lock Detection mode Searching & 1: D-Sync Pulse count mode SYBBF Tuning Select Sync-Det-1 0: High Level for Sync detection 1: Low Level Select Sync-Det-1 0: High Level...

  • Page 50: Block Diagram

    6、Block Diagram M2 8L (G 2) B l o c k D i a g r a m By SLF 2006/09/28 IC801 Q815 T803 220V~ D801—D804 Transformer IC802 Q501 Q503 R/G/B Q505 AMP. R/G/B V. AMP. V.out IC301 TMPA8873 Tuner IF AMP FOCUS IC201(2)

  • Page 51: Schematic Diagram

    7、 Schematic Diagram...

  • Page 53: Trouble Shooting

    Flow chart No PIC. OK Check the wave form Check the wave form Check the wave from at Pin50.51.52 of Replace CRT Board at Pin30 of IC201 at Pin26 of IC201 IC201 Check the wave form Check Check the voltage at Replace IC201 at Pin41,42 of C242,Q209,R218...
  • Page 54 Check z2001. Check C605. No Sound OK Z2002.D203.D204 C608.C605B.C608B Check the wave form Check the wave form Check the wave form Check the wave form at Pin31 of IC201 at Pin33 at Pin28.29 of IC201 at Pin7.10 of IC601 Check the wave form Replace IC201 at Pin34,37 of IC201 Check the wave form...
  • Page 55 No raster, No Check SW801. PIC. Sound OK Replace T802 F801.DB801 Check the Check the Check the voltage of voltage of "B+" voltage of 300V 12V.12VA.33V Check the Check Replace voltage at PIN1 Q401.Q402.T40 Q401.Q402.T40 of P502 Check the voltage at PIN3 Replace T401 of P502 Check the R/G/B voltage at...

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