Haier MX-TM7414Mpeg4 Service Manual Download Page 1

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SERVICE MANUAL

Colour Television

Haier model:

DTA-1496

Customer model:

MX-TM7414Mpeg4

FEATURES

DVD-TV14

”

COMBO

AUTO TUNE/218 CHANNES

DVD/VCD/SVCD/CD/CD-R/CD-RW/JPEG/MP3 COMPATIBLE

FORMATO DE VIDEO 4:3PS

、

4:3LB

DOLBY AC-3 DECODE

PANATAL LOCK

CAUTION                                                  READ
THIS  MANUAL  CAREFULLY  TO  DIAGNOSE
TROUBLE  CORRECTLY  BEFORE  OFFERING
SERVICE .

Summary of Contents for MX-TM7414Mpeg4

Page 1: ...MX TM7414Mpeg4 l FEATURES l DVD TV14 COMBO l AUTO TUNE 218 CHANNES l DVD VCD SVCD CD CD R CD RW JPEG MP3 COMPATIBLE l FORMATO DE VIDEO 4 3PS 4 3LB l DOLBY AC 3 DECODE l PANATAL LOCK CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE CORRECTLY BEFORE OFFERING SERVICE ...

Page 2: ... precautions 3 2 TV block diagram 4 3 Replacement of memory IC 5 4 Service adjustment 5 5 ICs functional description 8 6 Test point waveform 10 7 All ICs voltages 10 8 Purity convergence adjustment 11 9 DVD maintenance 13 ...

Page 3: ...not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button 8 When service is required observe the original lead dress Extra precaution should be given to assure ...

Page 4: ... 4 2 Block diagram TDA9351PS N2 series with mono intercarrier sound demodulator ...

Page 5: ...data adjustment of corresponding factory menus Press EXIT key to exit factory mode Focus adjustment 1 Receive a crosshatch signal 2 While watching the screen adjust the FOCUS VR on the FBT to make the vertical and horizontal lines as fine and sharp as possible Geometrical adjustment Receive PAL standard complete pattern signal Adjustment steps a Adjust VSL to the centre horizontal line just appear...

Page 6: ...t 0 A 0BRI Listen Brightness 0 A 0COL Listen Colour 50 A 0SHP Listen Sharpness 50 A 1CON Soft Contrast 45 A 1BRI Soft Brightness 45 A 1COL Soft Colour 50 A 1SHP Soft Sharpness 50 A 6 Picture preset 2 2CON Standard Contrast 75 A 2BRI Standard Brightness 50 A 2COL Standard Colour 50 A 2SHP Standard Sharpness 60 A 3CON Dynamic Contrast 85 A 3BRI Dynamic Brightness 60 A 3COL Dynamic Colour 60 A 3SHP D...

Page 7: ...on Description Preset Remark Bit 6 HALFTONE 1 Enable 1 EA Bit 5 IDENT_SENSITIVE 1 EA Bit 4 HCO 1 Enable 0 EA Bit 3 LOGO 1 EA Bit 2 TILT 0 EA Bit 1 SPANISH 1 EA Bit 0 ROMANIA 0 EA 5 OP5 Bit Function Description Preset Remark Bit 7 STORE_AV 1 Enable 1 EA Bit 6 OSO 1 Enable 0 EA Bit 5 SOFR_CHANGE 1 Enable 0 EA Bit 4 FADE 1 Enable 0 EA Bit 3 SOUND_M 1 Enable 0 EA Bit 2 SOUND_I 1 Enable 0 EA Bit 1 SOUN...

Page 8: ... DESCRIPTION STAND BY output 1 In STAND BY mode low level Power OFF For Power ON this pin will be high SCL 2 I2 C bus clock line SDA 3 I2 C bus data line TUNING 4 tuning Voltage Vt PWM output KEY 5 Control keys input SYSTEM 6 TV system control VOL 7 Sound Volume control PWM output MUTE 8 Sound mute output VSSC P 9 Digit ground for μ controller core and periphery CTL 10 DVD power control STANDBY 11...

Page 9: ... B input U B Y input PB input BCLIN 49 Beam current limiter input BLKIN 50 Black current input RO 51 Red output GO 52 Green output BO 53 Blue output VDDA 54 Analog supply of Closed Caption decoder and digital supply of TV processor 3 3 V VPE 55 Ground VDDC 56 Digital supply to core 3 3 V OSCGND 57 Oscillator ground supply XTALIN 58 Crystal oscillator input XTALOUT 59 Crystal oscillator output RESE...

Page 10: ...V FEEDBACK 9 Vertical feedback GND 5 Ground 5 U101 Tuner PIN Function PIN Function 1 AGC 7 5V 2 vacant 8 vacant 3 Gnd 9 Vt 33V 4 SCL 10 Gnd 5 SDA 11 IF Out 6 5V 6 Test point Waveforms 7 IC voltages 5Vpp 0 9Vpp 1 3Vpp H H 1Vpp V CRT KB CRT KG CRT KR 95Vpp 95Vpp 95Vpp H H H TDA9351 PIN53 2 5Vpp 2 5Vpp 3 8Vpp H H H TDA9351 PIN52 TDA9351PIN51 TDA9351 PIN33 TDA9351 PIN34 0 8Vpp V TDA9351 PIN21 TDA9351 ...

Page 11: ... 38 39 40 41 42 43 44 45 46 47 48 V 0 5 0 3 0 1 7 2 4 3 4 8 3 9 0 3 3 0 3 6 1 4 2 5 2 5 2 5 PIN 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 V 1 9 5 0 2 4 2 4 2 4 3 1 0 3 2 0 1 8 1 7 0 3 2 5 1 3 3 5 TDA8357 PIN 1 2 3 4 5 6 7 8 9 V 0 8 0 7 16 6 9 0 43 7 2 0 3 7 2 AN 7522N PIN 1 2 3 4 5 6 7 8 9 10 11 12 V 10 4 4 0 4 4 2 75 1 4 0 1 4 0 35 4 4 0 4 4 24C08 PCF8598 PIN 1 2 3 4 5 6 7 8 V 0 0 5 1 0 3 2...

Page 12: ...the screen Fig 3 8 Move the deflection yoke forward and fix the position of the deflection yoke so that the whole screen will become green 9 Insert the wedge to the top side of the deflection yoke so that it will not move 10 Input a crosshatch signal 11 Verify that the screen is horizontal 12 Input red and blue raster signals and make sure that purity is properly adjusted CRT WEDGE DEFLECTION YOKE...

Page 13: ...t convergence DYNAMIC CONVERGENCE ADJUSTMENT 1 Move the deflection yoke up and down and overlap lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat 1 and 2 above and make the best convergence After adjustment fix the wedge at the original position Fasten the retainer screw of the deflection yoke Fix the 6 magnets with glue FRO...

Page 14: ...onding pins of MT1389D to see if there is any short circuit break or faulty soldering 4 System in normal operation but the audio has no sound 1 Because the AUDIO DAC is built in MTK1389D IC you need to check the lower passing amplifying circuit and the MUTE circuit at the back of the LPF circuit Also check if there is any power supply to the LPF circuit 2 Check if the power supply voltage required...

Page 15: ...CN602 CN601 B SCL SDA AGC 9 GND BT 11 IF 10 8 3 1 5 4 6 7 2 TU101 TEDE9 276A 16V 10μF C107 104 C202 C201 10u KA33V DZ201 A1 33V D2901C SF101 MTZJ9 1B DZ101 16V 47μF C108 BF370 V101 1 6W 10 R104 1 6W 13K R105 1 6W 470 R106 25V 220μF C102 MTZJ5 1B DZ102 63V 0 1μF C101 1 6W 68K R261 1N4148 VD217 1 6W 9 1K R260 1 6W 1K R227 1 6W 9 1K R262 B4 12V C214 104 SYSTEM 1W 33 R110 LGA0203 100 L102 SDA SCL 1 6W...

Page 16: ...15 Sincere Forever Haier Group Haier Industrial Park No 1 Haier Road 266101 Qingdao China http www haier com ...

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