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XOCECO LET2053 Service Manual

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COLOR TELEVISION
LET2053
(TS2053)

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Summary of Contents for XOCECO LET2053

  • Page 1 COLOR TELEVISION LET2053 (TS2053)

  • Page 2: Table Of Contents

    CONTENTS Safety Precautions………………………………………………………………………..…… Alignment instruction. ………………………………….…………………………….……. Debugging instruction …………………………………………….…………………………. IC Block diagram ……………………………..…..…..…..…..…..…….………….…………. Function introduction to pin……………………..……………………….………………….. Wiring diagram……………………………………………………………………………..… Exploded view………..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…... Part list ………………………………………………………..……………......Schematic diagram …………………………………………………………………….……..
  • Page 3 AUTION: THIS SERVICE MANUAL IS ONLY FOR PROFESSIONAL SERVICE PERSONNEL’S REFERENCE. BEFORE SERVICING THIS CHASSIS, PLEASE READ THE FOLLOWING NOTICE ITEMS. 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 1.3 PRODUCT SAFETY NOTICE Many electrical and mechanical parts in the chassis have special safety-related characteristics. These 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.

  • Page 5: Debugging Instruction

    3 TEST EQUIPMENT 3.1 AUDIO VOLTAMETER 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 adjustment SUB-BRIGHT to let picture on the screen microbright. 4.5 receive white balance adjustment signal enter PAGE3 of factory menu, press PP to select T1 picture mode, let the value of GD unchange, adjust RD and B.D to let the white part of the picture appear “white”. 4.6 Use white balancer to rectify the white balance under following conditions colour temperature:12000K+8MPCD x =0.270±...
  • Page 7 AUTO PASSWORD CLEAR volume 4.12 the factory menu adjustment model pre-set item Pre-set model P1-60 V SIZE 60HZ field amplitude 4.5.1 V SHIFT 60HZ field center 4.5.1 H-PHASE 60HZ H-center 4.5.1 V LINE 60HZ V-line 4.5.1 V SC 60HZ field S-correct 4.5.1 V COMP field amplitude compensate...
  • Page 8 SIF SW Sound IF0=4.5MHZ fixed VIDEO LEVEL VIDEO LEVEL fixed GY ANGLE G-Y demodulation angle fixed V.R TM Filed scan strting time fixed R/B ANG R-Y/B-Y demodulation angle Fixed R/B BAL R-Y/B-Ydemodulation balance fixed C TRAP Color trap filter fixed H FREQ H-frequency fixed...
  • Page 9 CRAY.MODE Test signal fixed,0=white(75%)1=grey(15%) 4.4 adjustment dark white BY TV Blue chromatism DC level balance(TV/AV model) 4.4 adjustment dark white RY TV Red chromatism DC level balance(TV/AV model) DVD input Blue chromatism 4.4 adjustment dark white balance (DVD BY YUV DC level input) DVD input Red chromatism...
  • Page 10 VOL 1 1% volume control speciality fixed VOL 25 25%volume control speciality fixed VOL 50 50%volume control speciality fixed VOL 75 75%volume control speciality fixed 72700 fixed ,1=ALC ON Baseband model ,input level The unit no use adjustment SAP LEVEL SAP level fixed SIF.M/BB.M...

  • Page 11: Ic Block Diagram

    IC BLOCK DIAGRAM LA76931...

  • Page 12: Function Introduction To Pin

    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 13 Mute, high 5.00 Level availability I2C DATA 5.00 x T2 4.50 I2C CLOCK 5.00 x T1 2.70 KA5Q0565RT Function introduction to pin name function Reference Voltage(V) Drain drain output of MOSFET, current-limiting checking point of internal drain current. source of MOSFET,common ground and reference of circit controlled by source.
  • Page 14 AN7522 Pins function function function power GND input CH2 input CH1+ output volume CH1- output CH1+ output Stand-by GND (CH2 output) CH1 input CH1+ output LA78040...
  • Page 15 Pins function pin function pin function Inverting input Ver. output Output stage vcc Pump up output 7 NON inverting input LA72700 pin function pin function AC coupling input dbx RMS detection AC coupling output Dbx main signal V/I charge filter Stereo VCO PLL filter Decoupling filter Pilot level check...
  • Page 16 Stereo detection sensitivity 32 Model output: MONO=0.9V SAP=2.0V STEREO=3.0V STEREO+SAP=3.8V SAP detection sensitivity Sub-carrier input(3.579545MHZ 200Mv) dbx RMS detection Filter adjustment check Dbx broad band detection Pilot dispel reference signal1 Dbx spectrum detection Pilot dispel reference signal2...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM XS302 XS501 XS701 XS604 XS602 XS401 TUNER XS402 AV BOARD XS606 667-TS2130-29...

  • Page 19: Exploded View

    TS2053 PART LIST OF EXPLODED VIEW DESCRIPTION PART# REAR NAMEPLATE 880-10205-877 SCREW 851-24020-14 COMPONENT SCREW 855-96030-11 335-2112Q-00U CRT FIXED BLOCK 868-20472-00D POWER BUTTON 877-60607-00 SCREW 855-A0029-00 SPEAKER 384-40308-40 SPEAKER BRACKET 870-20849-00 FRONT CABINET ASSY 611-C53Y1-0H1 LED COLUMN 700-60164-00 DECORATIVE PIECE 743-10125-T0 BUTTON 877-50433-T0...

  • Page 20: Part List

    PART LIST PART# DESCRIPTION LOCA.NO. 100-TS20530-13 LET2053 100-TS20530-01 TS2053 123-30001-04 TWIST WIRE 335-2112Q-00U CRT54SX503Y22-DC01 THIN ! 477-12105-00U DEGAUSS COIL DX-56-2 488-10012-00 BATTERY 7＃(made in china 602-TS2030-02 SCHEMATIC DIAGRAM 604-TS20537-00 OWNER'S MANUAL(LEGEND) 611-C53Y1-0H1 FRONT CABINET ASS'Y ( SILVERY WHITE 03,SILK-SCREEN )
  • Page 21 868-20672-00A PRESS BLOCK 870-20517-00 SWITCH PIECE 870-20845-00 LEFT LEADING TRACK 870-20846-00 RIGHT LEADING TRACK 880-10205-877 BACK PLATE (LET2053,LEGEND) 880-10776-A1 FRONT LOGO LEGEND SILVERY GREY 10C21" 881-63016-00A POWER SYMBOL LABEL (T2751) 881-63966-00 BAR CODE LABEL (69020720530) 881-80671-00 SERVICE CARD (20-24 CRT)
  • Page 22 868-10043-00 WASHER (14X4X1 METAL ) 851-53010-31 SCREW SJ2825 ST3X10FT-D.Zn 667-TS2153-05 KEY BOARD ASS'Y 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B SW901 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B SW902 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B SW903 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B SW904 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B SW905 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B SW906 467-1C210-H0 CARBON RESISTOR 1/6W-1K-J...
  • Page 23 JUMPER WIRE J013 JUMPER WIRE J014 JUMPER WIRE J015 JUMPER WIRE J016 JUMPER WIRE J017 JUMPER WIRE J018 JUMPER WIRE J019 JUMPER WIRE J020 JUMPER WIRE J021 JUMPER WIRE J022 JUMPER WIRE J023 JUMPER WIRE J025 JUMPER WIRE J026 JUMPER WIRE J027 JUMPER WIRE J028...
  • Page 24 JUMPER WIRE J068 JUMPER WIRE J069 JUMPER WIRE J070 JUMPER WIRE J071 JUMPER WIRE J072 JUMPER WIRE J073 JUMPER WIRE J074 JUMPER WIRE J075 JUMPER WIRE J076 JUMPER WIRE J077 JUMPER WIRE J078 JUMPER WIRE J079 JUMPER WIRE J080 JUMPER WIRE J081 JUMPER WIRE J082...
  • Page 25 340-00001-003 DIODE 1N4148 VD506 340-00001-003 DIODE 1N4148 VD510 340-00001-003 DIODE 1N4148 VD512 340-00001-003 DIODE 1N4148 VD601 340-00005-003 DIODE S5295J VD301 340-00010-003 DIODE S5295G VD313 340-00011-003 DIODE 1N4002 VD308 340-00079-00 DIODE FR103 VD504 340-00079-00 DIODE FR103 VD505 340-00079-00 DIODE FR103 VD507 340-00079-003 DIODE FR103 VD304...
  • Page 26 364-32108-00 2-PINS CONNECTORS TJC1-2A XS502 364-33101-00 3-PINS CONNECTORS TJC3-03A XS203 364-34101-00 4-PINS CONNECTORS TJC3-04A XS202 364-34101-00 4-PINS CONNECTORS TJC3-04A XS205 364-36101-00 6-PINS CONNECTORS TJC3-06A XS604 364-36101-00 6-PINS CONNECTORS TJC3-06A XS701 364-36102-00 6-PINS CONNECTORS TJC2-6A XS301 364-58204-00 CRT SOCKET GZS8-17(UL) ! XS403 364-77511-00 FUSE HOLDER...
  • Page 27 459-5122K-002 CERAMIC CAPACITOR RQC05B221K-6H46UA C302 459-5139K-002 CERAMIC CAPACITOR CK45-B2H391KYR C306 459-5168K-002 CERAMIC CAPACITOR RQC06B681K-6H46UA C315 459-5168K-002 CERAMIC CAPACITOR RQC06B681K-6H46UA C318 459-5168K-002 CERAMIC CAPACITOR RQC06B681K-6H46UA C323 459-5168K-002 CERAMIC CAPACITOR RQC06B681K-6H46UA C513 459-5168K-002 CERAMIC CAPACITOR RQC06B681K-6H46UA C515 459-5182K-002 CERAMIC CAPACITOR DD06-999B812K500 C305 459-6147K-00 CERAMIC CAPACITOR DE0705B471K1k C514...
  • Page 28 464-60547-M02 ELECTROLYTIC CAPACITOR CD110-50V-4.7uF-M C330 464-60610-M0 ELECTROLYTIC CAPACITOR CD110-50V-10uF-M C104 464-60610-M02 ELECTROLYTIC CAPACITOR CD110-50V-10uF-M C324 464-60647-M02 ELECTROLYTIC CAPACITOR CD110-50V-47uF-M C509 464-62547-M02 ELECTROLYTIC CAPACITOR CD288-160V-4.7uF-M C307 464-62710-M0 ELECTROLYTIC CAPACITOR CD288-160V-100uF-M C301 464-62710-M0 ELECTROLYTIC CAPACITOR CD288-160V-100uF-M C517 464-65547-M0 ELECTROLYTIC CAPACITOR CD288-250V-4.7uF-M C338 464-65610-M0 ELECTROLYTIC CAPACITOR CD288-250V-10uF-M C303...
  • Page 29 467-1C033-H03 CARBON RESISTOR 1/6W-33Ω-J R303 467-1C051-H03 CARBON RESISTOR 1/6W-51Ω-J R208 467-1C075-H03 CARBON RESISTOR 1/6W-75Ω-J R601 467-1C075-H03 CARBON RESISTOR 1/6W-75Ω-J R602 467-1C075-H03 CARBON RESISTOR 1/6W-75Ω-J R603 467-1C075-H03 CARBON RESISTOR 1/6W-75Ω-J R604 467-1C075-H03 CARBON RESISTOR 1/6W-75Ω-J R609 467-1C075-H03 CARBON RESISTOR 1/6W-75Ω-J R616 467-1C075-H03 CARBON RESISTOR 1/6W-75Ω-J R621...
  • Page 30 467-1C218-H03 CARBON RESISTOR 1/6W-1.8K-J R708 467-1C222-H03 CARBON RESISTOR 1/6W-2.2K-J R205 467-1C230-H03 CARBON RESISTOR 1/6W-3K-J R212 467-1C230-H03 CARBON RESISTOR 1/6W-3K-J R517 467-1C239-H03 CARBON RESISTOR 1/6W-3.9K-J R522 467-1C243-H03 CARBON RESISTOR 1/6W-4.3K-J R610 467-1C243-H03 CARBON RESISTOR 1/6W-4.3K-J R611 467-1C247-H03 CARBON RESISTOR 1/6W-4.7K-J R210 467-1C247-H03 CARBON RESISTOR 1/6W-4.7K-J R313...
  • Page 31 467-1C324-H03 CARBON RESISTOR 1/6W-24K-J R510 467-1C333-H03 CARBON RESISTOR 1/6W-33K-J R328 467-1C339-H03 CARBON RESISTOR 1/6W-39K-J R201 467-1C347-H03 CARBON RESISTOR 1/6W-47K-J R237 467-1C347-H03 CARBON RESISTOR 1/6W-47K-J R238 467-1C368-H03 CARBON RESISTOR 1/6W-68K-J R242 467-1C410-H03 CARBON RESISTOR 1/6W-100K-J R101 467-1C410-H03 CARBON RESISTOR 1/6W-100K-J R344 467-1C410-H03 CARBON RESISTOR 1/6W-100K-J R527...
  • Page 32 469-10023-00 THERMISTOR 96708 (9Ω) RT501 469-40004-00 THERMISTOR 5D2-14LC R502 470-00361-00U SWITCHING TRANSFORMERSR4039C T501 471-2022K-003 PEAKING COIL SPT0305-220K-5 L202 471-2027K-003 PEAKING COIL SPT0305-270K-5 L203 471-2027K-003 PEAKING COIL SPT0305-270K-5 L204 471-2068K-10 PEAKING COIL LGA0410-68uH-K L102 471-2B56K-003 PEAKING COIL SPT0305-R56K-5 L101 472-10001-00 HORIZONTAL DRIVE TRANSFORMER XR0961 T302 472-24212-00 FBT BSC25-3368MTHICK !
  • Page 33 881-60074-00 HIGH VOLTAGE WARNING LABEL 887-20171-00 PALSTIC BAG 70-500-0.06 893-10300-11 NUT GB6170-86-M3-D.Zn N503 893-10300-11 NUT GB6170-86-M3-D.Zn V302 893-10300-11 NUT GB6170-86-M3-D.Zn V502 894-40030-11 WASHER GB859-87,3-DZn N503 894-40030-11 WASHER GB859-87,3-DZn V302 894-40030-11 WASHER GB859-87,3-DZn V502 895-6020025-50 RIVET GB876-86-2X2.5-COPPER M103 895-6020025-50 RIVET GB876-86-2X2.5-COPPER M104 895-6020025-50 RIVET GB876-86-2X2.5-COPPER...
  • Page 34 655-61201-154 (6-PINS) LEAD WITH HOUSING 384-40308-40 SPEAKER ST511-02...
  • Page 35 NS01 LA72700...

This manual is also suitable for:

Ts2053