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XOCECO LET3250 Service Manual

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COLOR TELEVISION
LET3250
(TS3250)

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Summary of Contents for XOCECO LET3250

  • Page 1 COLOR TELEVISION LET3250 (TS3250)

  • Page 2: Table Of Contents

    CONTENTS Safety Precautions………………………………………………………………………..…… Alignment instruction. ………………………………….…………………………….……. Debugging instruction …………………………………………….…………………………. Block diagram ……………………………..…..…..…..…..…..…….………….…………… IC Block diagram……………………..……………………….……………………………… Wiring diagram……………………………………………………………………………..… Exploded view………..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…... Part list ………………………………………………………..……………......Schematic diagram …………………………………………………………………….……..

  • Page 3: Safety Precautions

    Note:This service manual is only for professional service personnel’s reference. Before servicing the unit, please read the following items carefully. 1. SAFETY INSTRUCTION AND GENERAL INSTRUCTION Before servicing and aligning this equipment, please read the following “X-RAY RADIATION PRECAUTION” , “SAFETY PRECAUTION” and “PRODUCT SAFETY NOTICE”. 1.1 X-RAY RADIATION PRECAUTION 1）...

  • Page 4: Alignment Instruction

    characteristics are often passed unnoticed by a visual inspection and the X-RAY RADIATION protection afforded by them cannot necessarily be obtained by using replacement components rated for higher wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplement electrical components having such features are shaded on the schematic diagram and the parts list.

  • Page 5: Debugging Instruction

    3.2 OSCILLOGRAPH 3.3 HIGH-VOLTAMETER 3.4 DIGITAL MULTIMETER 3.5 AC ATTACK PULL TEST EQUIPMENT 3.6 SCAN frequency signal generator BT-3 4 Debugging instruction 4.1 enter into the factory debugging menu use to the remote control(RC-A23),follow to the blow model enter into the factory: DISPLAY →...
  • Page 6 4.7 Use white balancer to rectify the white balance under following conditions color temperature:12000K+8MPCD x =0.270± 0.008 Y=0.283±0.008; dark space: 4.5nit, bright space: 60nit Note:1. While the colour saturation changed from maximum to minimum, if the dark balance appears changeable,adjust RY.TV and BY.TV (P12) to let it coincide with white balance. 2.
  • Page 7 4.16 the factory menu adjustment model pre-set item Pre-set model P1-60 V SIZE 60HZ field amplitude V SHIFT 60HZ field center H-PHASE 60HZ H-center V LINE 60HZ V-line V SC 60HZ field S-correct V COMP field amplitude compensate fixed L.BLK Left blanking fixed R.BLK...
  • Page 8 SUB-COL Sub-colour fixed SUB-SHP Sub-definition fixed SUB-TINT Sub-tint fixed VOL.FIL Volume control ADC filter fixed OSD.COT OSD contrast fixed OSD.HPOS OSD center fixed Line AFC loop gain and sync fixed gate switch VIF SW IF3=45.75MHZ fixed SIF SW Sound IF0=4.5MHZ fixed VIDEO LEVEL VIDEO LEVEL...
  • Page 9 FBP BLK SW Horizontal blanking switch fixed,0=inside produce;1=FBP and inside logic “and” DC REST DC recover rate fixed,0=100% 1=107% Field frequency division CD.MODE fixed,0=auto model CORE GAIN Noise reduction fixed,0=OFF 1=MIN 3=MAX γ.GAMA r-correct fixed,0=OFF RGB DC output RGB TEMP.SW fixed temperature speciality A.MONI SW...
  • Page 10 AV selection AV input select(3=AV1/AV2/S/DVD) MTS IC selection 0=nothing,1=72700 2=AN5832 V.OFF.MOTE Turn off model 0=discharge,1=close PWR.MEM Turn on model 0=standby,1=auto turn on,2=memory 1115 select LV1115 fixed,0=nothing;1=have No signal background BLCK GROND 0=nothing 1/3=blue background;2=black background selection South America and North N/PN 0=south america;1=north america America selection...

  • Page 11: Block Diagram

    BLOCK DIAGRAM...

  • Page 12: Ic Block Diagram

    MAIN IC LA76930 BLOCK DIAGRAM...
  • Page 13 Function introduction to pin function Reference function Reference voltage voltage SIF output 2.28 PIF input1 2.86 PIF AGC 2.61 PIF input 2 2.86 SIF input 3.11 IF GND FM filter 2.64 RF AGC output 4.55 FM filter/sound output 2.25 Video output 2.30 Sound output 2.24...
  • Page 14 POWER H=OFF 5.00 L=ON Turn voltage 1.73 5.00 output Mute, high 5.00 Level availability I2C DATA 5.00 x T2 4.50 I2C CLOCK 5.00 x T1 2.70 AN7522 Pins function function function power GND input CH1+ output CH2 input volume CH1- output CH1+ output Stand-by GND (CH2 output)
  • Page 15 FSCQ1265RT...

  • Page 16: Wiring Diagram

    WIRING DIAGRAM...

  • Page 17: Exploded View

    EXPLODED VIEW...
  • Page 18 TS3250 PART LIST OF EXPLODED VIEW DESCRIPTION PART# REAR CABINET 780-10903J040 REAR PANEL 808-60835-040 MAIN FRAME 863-60139-U00J WASHER 868-20548-00 CRT BRACKET 870-20793-00 STAND BY BUTTON BOARD ASSY 667-TS32351-05 FRONT CABINET ASSY 611-F50A3-0H1 SIDE AV BOARD ASSY 667-TS2950-29 SPEAKER 384-32108-50 STANDBY BUTTON 877-60594-00 BUTTON CAP 877-60542-00...

  • Page 19: Part List

    PART LIST PART# DESCRIPTION LOCA.NO. 100-TS32500-10 LET3250 100-TS32500-01 TS3250 123-30001-04 TWIST WIRE 335-3412M-00U *CRT M78LWQ70X01 (C) ! 477-13401-00 DEGAUSS COIL DX-87 488-10012-00 BATTERY 7＃(made in china 602-TS2750-01 SCHEMATIC DIAGRAM 604-TS32507-00 OWNER'S MANUAL(LEGEND) 611-F50A3-0H1 FRONT CABINET ASS'Y ( SILVERY WHITE 03,SILK-SCREEN )
  • Page 20 CRT FIXER 868-20548-00 CUSHION 868-20548-00 CUSHION 870-20793-00 CRT BRACKET 877-30256-00A HANDLE 880-10230-074 BACK PLATE SMD (LET3250,LEGEND) 880-10791-A1 FRONT LOGO (LEGEND SILVERY GREY 10C) 881-60085 BLANK WARNING LABEL 881-61884-00 CSA WARNING LABEL 881-63016-00A POWER SYMBOL LABEL (T2751) 881-80672-00 SERVICE CARD (27-32 CRT)
  • Page 21 459-2410R-00 CERAMIC CAPACITOR DD308-63F104Z50 CS21 462-B0322-H02 POLYESTER CAPACITOR CL21X-50V-0.022uF-J CS05 462-B0333-H02 POLYESTER CAPACITOR CL21X-50V-0.033uF CS07 462-B0422-H02 POLYESTER CAPACITOR CL21X-50V-0.22uF-J CS11 464-6D710-M0 ELECTROLYTIC CAPACITOR CD110-16V-100uF-M CS19 464-6E547-M0 ELECTROLYTIC CAPACITOR CD110-25V-4.7uF-M CS14 464-60433-M0 ELECTROLYTIC CAPACITOR CD110-50V-0.33uF-M CS02 464-60433-M0 ELECTROLYTIC CAPACITOR CD110-50V-0.33uF-M CS09 464-60522-M0 ELECTROLYTIC CAPACITOR CD110-50V-2.2uF-M CS08...
  • Page 22 467-1C224-H0 CARBON RESISTOR 1/6W-2.4K-J R409 655-41201-240 (4-PINS) LEAD WITH HOUSING X302 459-8222K-00 CERAMIC CAPACITOR DE1005B222K2K C407 464-6D722-M0 ELECTROLYTIC CAPACITOR CD110-16V-220uF-M C411 464-65610-M0 ELECTROLYTIC CAPACITOR CD288-250V-10uF-M C409 655-61201-173 (6-PINS) LEAD WITH HOUSING X401 467-1C110-H0 CARBON RESISTOR 1/6W-100Ω-J R401 467-1C110-H0 CARBON RESISTOR 1/6W-100Ω-J R402 467-1C110-H0 CARBON RESISTOR 1/6W-100Ω-J...
  • Page 23 JUMPER WIRE JUMPER WIRE L303 JUMPER WIRE V702( JUMPER WIRE X301 JUMPER WIRE JUMPER WIRE 329-33204-00 CRYSTAL 32.768K G201 329-54401-00 CRYSTAL JA18 4.433619MHZ G202 340-00079-00 DIODE FR103 VD304 340-00079-00 DIODE FR103 VD305 340-00079-00 DIODE FR103 VD306 340-00079-00 DIODE FR103 VD504 340-00079-00 DIODE FR103 VD505...
  • Page 24 459-6210K-00 CERAMIC CAPACITOR DE0705B102K1K C504 459-6210K-00 CERAMIC CAPACITOR DE0705B102K1K C505 459-6210K-00 CERAMIC CAPACITOR DE0705B102K1K C506 459-6210K-00 CERAMIC CAPACITOR DE0705B102K1K C508 459-B147M-20 CERAMIC CAPACITOR ECK-DNS471MBX C524 459-B147M-20 CERAMIC CAPACITOR ECK-DNS471MBX C525 459-B222M-20 CERAMIC CAPACITOR ECK-DNS222MEX C523 462-00333-H0 POLYESTER CAPACITOR CL11-100V-0.033uF-J 462-2B410-M0V POLYESTER CAPACITOR 250VAC-0.1uF-M C501 462-2B410-M0V...
  • Page 25 470-00376-00U *SWITCHING TRANSFORMERSD4929A T501 471-2056H-60 PEAKING COIL LGA0307-56uH-J L601 472-10001-00 HORIZONTAL DRIVE TRANSFORMER XR0961 T302 472-27148-00 FBT BSC29-3988N A ! T301 477-00081-00 LINERITY COIL HL1830H-X23 L302 477-20005-00 POWER FILTER LF21061 L502 477-20031-00 POWER FILTER LCL-21 L501 477-40031-00 FIXED COIL LG750 L301 477-40031-00 FIXED COIL LG750...
  • Page 26 852-13008-81 SCREW P(+) M3X8-D.Zn V306 863-60139-U00J MAIN BOARD FRAME (HIPS V0) 870-20690-U00A FBT BRACKET (HIPS V0) 881-60074-00 HIGH VOLTAGE WARNING LABEL 893-10300-11 NUT GB6170-86-M3-D.Zn N505 893-10300-11 NUT GB6170-86-M3-D.Zn V306 894-40030-11 WASHER GB859-87,3-DZn N505 894-40030-11 WASHER GB859-87,3-DZn V306 667-TSG50-01* MAIN PCB ASS'Y (AUTOMATIC INSERTION ) JUMPER WIRE JUMPER WIRE J101...
  • Page 27 JUMPER WIRE J229 JUMPER WIRE J230 JUMPER WIRE J231 JUMPER WIRE J231 JUMPER WIRE J232 JUMPER WIRE J233 JUMPER WIRE J234 JUMPER WIRE J235 JUMPER WIRE J236 JUMPER WIRE J237 JUMPER WIRE J301 JUMPER WIRE J302 JUMPER WIRE J303 JUMPER WIRE J304 JUMPER WIRE J305...
  • Page 28 JUMPER WIRE J703 JUMPER WIRE J704 JUMPER WIRE J705 JUMPER WIRE J706 JUMPER WIRE J708 JUMPER WIRE J709 JUMPER WIRE J710 JUMPER WIRE J712 JUMPER WIRE J713 JUMPER WIRE J714 JUMPER WIRE J715 JUMPER WIRE J716 JUMPER WIRE J719 JUMPER WIRE R314 JUMPER WIRE R322...
  • Page 29 459-2015H-102 CERAMIC CAPACITOR CC45-CH1H150JYR C201 459-2015H-102 CERAMIC CAPACITOR CC45-CH1H150JYR C220 459-2015H-102 CERAMIC CAPACITOR CC45-CH1H150JYR C221 459-2022H-102 CERAMIC CAPACITOR CC45-CH1H220JYR C229 459-2039H-102 CERAMIC CAPACITOR CC45-CH1H390JYR C203A 459-2047H-102 CERAMIC CAPACITOR CC45-CH1H470JYR C226 459-2122H-102 CERAMIC CAPACITOR CC45-CH1H221JYR C219 459-2210K-002 CERAMIC CAPACITOR CK45-B1H102KYR C333 459-2215K-002 CERAMIC CAPACITOR CT1-06-2B4-63V-152K C208...
  • Page 30 464-60447-M02 ELECTROLYTIC CAPACITOR CD110-50V-0.47uF-M C102 464-60447-M02 ELECTROLYTIC CAPACITOR CD110-50V-0.47uF-M C236 464-60447-M02 ELECTROLYTIC CAPACITOR CD110-50V-0.47uF-M C736 464-60510-M02 ELECTROLYTIC CAPACITOR CD110-50V-1uF-M C204 464-60510-M02 ELECTROLYTIC CAPACITOR CD110-50V-1uF-M C217 464-60510-M02 ELECTROLYTIC CAPACITOR CD110-50V-1uF-M C239 464-60510-M02 ELECTROLYTIC CAPACITOR CD110-50V-1uF-M C242 464-60510-M02 ELECTROLYTIC CAPACITOR CD110-50V-1uF-M C243 464-60510-M02 ELECTROLYTIC CAPACITOR CD110-50V-1uF-M C602...
  • Page 31 464-6D722-M02 ELECTROLYTIC CAPACITOR CD110-16V-220uF-M C708 464-6D733-M02 ELECTROLYTIC CAPACITOR CD110-16V-330uF-M C233 464-6D733-M02 ELECTROLYTIC CAPACITOR CD110-16V-330uF-M C530 464-6D747-M02 ELECTROLYTIC CAPACITOR CD110-16V-470uF-M C319 464-6D747-M02 ELECTROLYTIC CAPACITOR CD110-16V-470uF-M C519 464-6D747-M02 ELECTROLYTIC CAPACITOR CD110-16V-470uF-M C521 464-6F710-M02 ELECTROLYTIC CAPACITOR CD110-35V-100uF-M C332 467-1C010-H03 CARBON RESISTOR 1/6W-10Ω-J R309 467-1C010-H03 CARBON RESISTOR 1/6W-10Ω-J R507...
  • Page 32 467-1C210-H03 CARBON RESISTOR 1/6W-1K-J R708 467-1C210-H03 CARBON RESISTOR 1/6W-1K-J R710 467-1C210-H03 CARBON RESISTOR 1/6W-1K-J R750 467-1C210-H03 CARBON RESISTOR 1/6W-1K-J R751 467-1C212-H03 CARBON RESISTOR 1/6W-1.2K-J R106 467-1C212-H03 CARBON RESISTOR 1/6W-1.2K-J R717 467-1C215-H03 CARBON RESISTOR 1/6W-1.5K-J R318 467-1C218-H03 CARBON RESISTOR 1/6W-1.8K-J R244 467-1C218-H03 CARBON RESISTOR 1/6W-1.8K-J R704...
  • Page 33 467-1C310-H03 CARBON RESISTOR 1/6W-10K-J R714 467-1C310-H03 CARBON RESISTOR 1/6W-10K-J R730 467-1C310-H03 CARBON RESISTOR 1/6W-10K-J R731 467-1C310-H03 CARBON RESISTOR 1/6W-10K-J R735 467-1C310-H03 CARBON RESISTOR 1/6W-10K-J R736 467-1C312-H03 CARBON RESISTOR 1/6W-12K-J R327 467-1C315-H03 CARBON RESISTOR 1/6W-15K-J R241 467-1C320-H03 CARBON RESISTOR 1/6W-20K-J R227 467-1C322-H03 CARBON RESISTOR 1/6W-22K-J R319...
  • Page 34 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER 895-6020025-50 RIVET GB876-86-2X2.5-COPPER...
  • Page 35 667-TS3250-05 KEY BOARD ASS'Y 340-10097-60 LED HFB90101M VD902 352-03810-80 *IC AT138B-T12 RC901 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S901 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S902 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S903 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S904 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S905 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S906 467-1C147-H0 CARBON RESISTOR 1/6W-470Ω-J...
  • Page 36 XS604 XS601 PIN6 G V G R L XS602 C741 C742 C743 C744 C601 C606 C604 R601 100p 100p 100p 100p 0.01uF 10u/16A 10u/16v R616 AN7522 N701 L601 4.7K 56uH R607 R608 R744 R743 R604 R606 R610 R615 100K 100K R602 R603 C610...

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Ts3250

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