Edition: 2005-5-6 CONTENTS Safety precautions……………………………………………………………..……………3 TV block diagram……………………………………………………………………..…….4 Replacement of memory IC………………………………………………………….……5 Service adjustment……………………………………………………………..…………...5 ICs functional description…………………………………………………………………8 Test point waveform………………………………………………………………………10 All ICs voltages……………………………..……………………………………………….10 Purity / convergence adjustment………………………………………………………11 DVD maintenance…………………………………………………………………………13 10. List of Parts ………………………………………………………………………….…….14 11. Circuit diagram……………………………………………………………………………28 12. Exploded view………………………………………………………………………29...
1. SAFETY PRECAUTIONS The design of this product contains special hardware, many Isolation Check circuits and components especially for safety purposes. For (Safety for Electrical Shock Hazard) continued protection, no changes should be made to the After re-assembling the product, always perform an isolation original design unless authorized in writing by the check on the exposed metal parts of the cabinet (antenna manufacturer.
3. REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. 2. PROCEDURE FOR REPLACING MEMORY IC (1) Power off Switch the power off and unplug the power cord from AC outlet. (2) Replace IC Be sure to use memory IC written with the initial data values.
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Adjustable Items Direct access key Items Description Preset Remark “0” Adjust VG2 voltage “1” 5/6HSH Horizontal shift “2” 5/6VSL Vertical slop 5/6VAM Vertical amplitude 5/6SCL S-correction 5/6VSH Vertical shift 5/6VOF OSD Vertical offset HOF* OSD Horizontal offset “3” Black level offset R Black level offset G White point R White point G...
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XMAX “no signal”osd the horizon rightmost position YMIN “no signal”osd vertical leftmost position YMAX “no signal”osd vertical rightmost position NOTE: THE ITEMS WITH REMARK “A” IS ADJUSTABLE DATA. Optional data Function Description Preset Remark Bit 7 OP_RGB 1=Enable Bit 6 OP_DVD 1=Enable Bit 5...
Function Description Preset Remark Bit 7 OP_STORE_AV 1= Enable Bit 6 OP_OSO 1= Enable Bit 5 OP_SOFT_CHANGE 1=Enable Bit 4 OP_FADE 1=Enable Bit 3 OP_ SOUND_M 1= Enable Bit 2 OP_ SOUND_I 1= Enable Bit 1 OP_ SOUND_BG 1=Enable Bit 0 OP_SOUND_DK 1=Enable 6.
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SYMBOL DESCRIPTION STAND BY output. In STAND BY mode, low level (Power OFF). For Power ON this pin will be high. C-bus clock line C-bus data line TUNING tuning Voltage (Vt) PWM output Control keys input SYSTEM TV system control Sound Volume control PWM output MUTE Sound mute output...
Note SVHS 2. N902 24C08/PCF8598 Function Upper resistance SDA data wire SCL clock wire +5V Power 3. N601: Sound power amplify (AN7522N) Symbol Function Symbol Function Power supply ground Out 1 (+) Ch 1 output (+) In 2 Ch 2 input GND(out 1) Ch 1Ground Volume Control...
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PURITY ADJUSTMENT WEDGE Demagnetize CRT with the demagnetizer. DEFLECTION YOKE Loosen the retainer screw of the deflection yoke. Remove the wedges. Input a green raster signal from the signal generator, and turn the screen to green raster. Move the deflection yoke backward. P/C MAGNETS Bring the long lug of the purity magnets on the short P: PURITY MAGNET...
STATIC CONVERGENCE ADJUSTMENT 1. Input a crosshatch signal. 2. Using 4-pole convergence magnets overlap the red and blue lines in the center of the screen (Fig. 1) and turn them to magenta (red/blue). (FRONT VIEW) 3. Using 6-pole convergence magnets overlap the magenta (red/blue) and green lines in the center of the screen and turn them to white.
9. DVD Part: Introduction of MTK1389D maintenance NOTE: MTK1389D type LSIC decode .MTK1389D consists RF,SERVO,DSP,DECODE,VIDEO DAC and AUDIO DAC. Under normal power supply conditions, the maintenance plan for MT1389D mono-chip is: first the reset circuit resets the MT1389D, after the crystal oscillator circuit gave the clock signal to MT1389D, MT1389D will start the initialization check for Flash、E PROM、SDRAM, after everything is checked to be normal, it will start initialization check for built-in Audio DAC, servo and motor Driver IC .
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RUBBER 0090300453 FRONT CABINET UNIT 0090807137 0090205215 FRONT CABINET MTAE4063AE--Q 0090205267 REMOTE LENS MTAE4062AE--Q 0090205265 LED LENS SCREW SJ2824-87 ST3X10F 0090600011 SCREW SJ2824-87 ST3X10F 0090600011 SCREW SJ2824-87 ST3X10F 0090600011 0090204210 POWER CAP SPRING 0090100107 SPEAKER YDT0407-9AU-8W-8Ω 0094002137 SPEAKER WIRE 0090401453 SCREW SJ2824-87 ST3X10F 0090600011...
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TEM101 0090200008 HIGH VOLTAGE SPACER BUCKLE TMMOA411-1 0090200047 POWER LINE HOOK MTAJ6004AG--Q 0090202659 SCREW SJ2824-87 SJ4X16F 0090600023 SCREW SJ2824-87 SJ4X16F 0090600023 MTEA4074----Q 0090504738 UP FOAM PADDING MTEA4075----Q 0090504739 DOWN FOAM PADDING LASER LABEL 0090204751 SCREW 0090100297 SJ2824-87ST5X25(φ20) SCREW SJ2825-87 ST3x12F 0090600013 DEGAUSS CORD HOOK MTAJ1001AG--Q...