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Haier HT-3718 Service Manual

Colour television
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See also: Service Manual , User Manual
Features
218 programs stored
Auto-correcting black balance
Blue extension, Green improvement
Multi-picture modes
Fast teletext
Audio/video input, S-Video input, SCART terminal
NO: M-EU-CY-HT-3718-9361
HT-3718
COLOUR TELEVISION

Service Manual

Haier Group
Model:
HT-3718
(CYPRUS)
Edition:2003.5.20

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Summary of Contents for Haier HT-3718

  • Page 1: Service Manual

    HT-3718 COLOUR TELEVISION Service Manual Model: HT-3718 (CYPRUS) Features 218 programs stored Auto-correcting black balance Blue extension, Green improvement Multi-picture modes Fast teletext Audio/video input, S-Video input, SCART terminal Haier Group NO: M-EU-CY-HT-3718-9361 Edition:2003.5.20...

  • Page 2: Table Of Contents

    CONTENTS Contents Contents ----------------------------------------------------------1 ------------- Product Code illumination and Series Introduction----------------------2 Features----------------------------------------------------------------------------------3 Safety Precautions--------------------------------------------------------------------4 Warning and Cautions---------------------------------------------------------------5 Net dimension--------------------------------------------------------------------------11 Parts and Functions------------------------------------------------------------------12 Remote Controller Functions-----------------------------------------------------13 Program Diagram----------------------------------------------------------------------14 Maintenance Service and Trouble shooting----------------------------------15 Circuit Diagram-------------------------------------------------------------------------18 Circuit Explanation--------------------------------------------------------------------22 Adjustment-------------------------------------------------------------------------------27 Exploded View--------------------------------------------------------------------------28 List of Parts------------------------------------------------------------------------------29 Damageable Parts List---------------------------------------------------------------44 Information of Resistors and Capacitors--------------------------------------45...

  • Page 3: Product Code Illumination And Series Introduction

    Product Code illumination and Series Introduction Product Code illumination and Series Introduction HT-3718 Color television appearance CRT size(unit:inch) Philip haier...

  • Page 4: Features

    Functures Features MODEL MODEL FUNCTION FUNCTION ITEM ITEM HT-3718 HT-3718 PICTURE SOFTWARE Main IC 9361 Digital curtain Flat square Slow fading on & off Color system Semitransparent menu Audio system Non-flashing channel changing NO.of channels ZOOM ENGLISH OSD language 16:9 mode...

  • Page 5: Safety Precautions

    Safety Precautions 4.Safety Precautions SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical identify these parts and mechanical parts in this chassis have special safety-related characteristics! In the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

  • Page 6: Warning And Cautions

    Warning and Cautions Warning and Cautions Warning and Cautions 1. When you clean the TV set, please pull 4. To prevent the TV set from firing and out the power plug from AC outlet. Don't electric shock, don't clean the cabinet and the screen with make the TV set rain benzene, petrol and other chemicals.
  • Page 7 Warning and Cautions and any of the safety precautions, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 5.1 Always unplug the receiver AC power cord from the AC power source before: a. Removing or reinstalling any component, circuit board module or any other assembly of the receiver.
  • Page 8 Warning and Cautions devices are integrated circuits and some field effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. Immediately before handling any semiconductor component or semiconductor- equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground.
  • Page 9 Warning and Cautions draw the melted solder with an anti-static, suction-type solder removal device with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil. Use the following unsoldering technique A). Allow the soldering iron tip to reach normal temperature. (500 F to 600 B).
  • Page 10 Warning and Cautions Removal/Replacement Heat and remove all solder from around the transistor leads. Remove the heat sink mounting screw (if so equipped). Carefully remove the transistor from the heat sink of the circuit board. Insert new transistor in the circuit board. Solder each transistor lead, and clip off excess lead.
  • Page 11 Warning and Cautions pin. Solder the IC connection. d. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.

  • Page 12: Net Dimension

    Net dimension Net dimension Top-view Side view Front view HT-3718...

  • Page 13: Parts And Functions

    Parts and Functions Parts and Functions FUNCTION BUTTONS AND EXTERNAL SOCKETS 1.Front Panel Remote sensor:let The remote controller aim here the set can receive remote control signal. Power switch:Press the button to turn on the TV set . press the button again to turn off the TV set.

  • Page 14: Remote Controller Functions

    Remote Controller Functions Remote Controller Functions Remote Controller R E M O T E C O N T R O L L E R B O A R D M A R K FU N C T IO N D E SC R IPTIO N Program scan St andby SW A P...

  • Page 15: Program Diagram

    Program Diagram Program Diagram Insert the power plug into the power line socket and insert the antenna plug into the antenna socket on the rear panel. Press down the power switch of the TV set. The red indicator light goes on.

  • Page 16: Maintenance Service And Trouble Shooting

    Maintenance Service and Trouble shooting Maintenance Service and Trouble shooting a.Factory adjustment information Operation method: after the appliance is switched on, press MUTE CALL -/-- CALL MUTE Button in turn and enter service mode. Press PRO- and PRO+ buttons to select items for adjustment. Press VOL- and VOL+ buttons to adjust selected items.
  • Page 17 Maintenance Service and Trouble shooting Specifications Variable Item Default Value Mark White point R White point G White point B YDFP Y-Delay for PAL YDFN Y-Delay for NTSC YDAV Y-Delay for AV AGC Take-Over point Volume 9874 Output Gain of TDA9874A AVLT TDA9874A AVL decay time 9860...
  • Page 18 Maintenance Service and Trouble shooting No light and sound Check to see if Fuse3 is normal Abnormal Normal Check to see 110V 180V Check VD503-VD, etc. voltage is normal 506,C511, N501, etc. Normal Abnormal Check to see if the T est to see all terminal collector voltage of Resistance of load VD512is 24V...
  • Page 19 Circuit Diagram Circuit Diagram C 406 C 703 X S3 0 6 MA IN B O A RD G T 701 1P 1uF/ 16V C 331 R 420 100K R 331 4. 7k C 330 R 329 4. 7k 10/16V S O C K E T - 21 V 401 G T 702 1P...

  • Page 20: Circuit Block Diagram

    Circuit Block Diagram 11.2 Circuit Block Diagram Antenna Sound Power Amplifier Picture/Sound IF Amplifier, Tune Video and audio signal Processing, RGB Output Circuits and H &V Sync pulse Horizontal Scan segregation Output C BUS Vertical Scan Output Main Processor Audio/Video In/Out Infrared Receiver Remote Controller...

  • Page 21: Circuit Diagram

    Circuit Diagram 11.3 PCB...

  • Page 22: Circuit Explanation

    Circuit Explanation Circuit Explanation A1.HT-3718 color TV set composed of the following sections (1) Small signal processing: super monolithic integrated circuits N201(TDA9361). and memory N901 (AT24C08). (2) Sound power amplifying: integrated circuits N301,N302 ( LA4285). (3) Horizontal and Vertical scan output circuits: Vertical output integrated circuits N801(TDA8357), Horizontal output transistor V902 (2SD1651), Horizontal flying back transformer T902 (JF0501-19930).
  • Page 23 Circuit Explanation Step Ground Resistance(R) Working Voltage Positive Negative Function BAND1 11.9K BAND2 6.38 3.0K 3.0K VSSA SEC.PLL 6.86M 4.4M 0.77K 0.75K DECD/G 29.9K PH2.LF 1.33M 0.45M PH1.LF 6.8M 4.2M GND3 DEC.BG 37.3K 37.2K AVL/EWD 6.9M 4.6M V.DRB 1.9K 1.9K V.DRA 1.9K 1.9K...
  • Page 24 Circuit Explanation Circuit Explanation Function Ground Resistance(R) Working Positive Negative Voltage Step VDD.C 26.2K OSC.GND 15.4 XTAL.IN 1.17M 262K XTAL.OUT 0.74M 227K RESET VDDP 26.2K 12.8K 12.9K 12.8K 12.9K IRin 36.9K 34.6K 2). Analysis of common path circuits High frequency television signals, received via an antenna (or transmitted through a cable TV system) to the input terminal of the high frequency tuner U101, are processed for tuning and high frequency amplifying and mixing, then a 38.9MHz image intermediate frequency and 31.5MH...
  • Page 25 Circuit Explanation Table 4 Working Ground Resistance(R) Voltage Function Positive Negative 6.27 54.4K 53.3K 5.51 54.1K 53.1K 1.21 86.2K 86.6K 4.19 20.5K 9.21 13.5K 13.3K 9.19 32.5K 32.3K 9.25 0.4M 0.4M 5). Analysis of horizontal sync and horizontal scan output circuits As the horizontal oscillation circuit is installed inside N201 (TDA9361), .
  • Page 26 Circuit Explanation Table 6 Working Ground Resistance (R) Voltage Positive Negative Step FUNCTION B IN 5.44K 5.43K R IN 5.44K 5.45K G IN 5.38K 5.39K 13.24K 13.3K 164.9 G OUT 114.5 2.1M 3.24M R OUT 114.2 1.8M 3.22M B OUT 113.4 2.1M 3.22M...

  • Page 27: Adjustment

    Adjustment Adjustment The chassis of this TV set uses Toshiba IC with the latest digital bus processing technology. The adjustment points are fewer and the adjustment is simpler. The adjustment method is as follows: 13.1. +B: 110±0.3V adjustment. 1) Switch on the power and connect PAL circular signals to the tuner. 2) Adjust variable resistor RP501 until the voltage of the main power is 110±0.3V.

  • Page 28: Exploded View

    Exploded View Exploded View HT-3718 EXPLOSION HT-3718 EXPLOSION BOM Part Name Part code Number Specification Remark 1 Front mask 0090203576 MTAA5099AC--Q V0-94 2 CRT AS 0094000202 BUA1001-----Q 3 CRT Ground AS 0090400175 JE214-02-4--Q 4 Screw 0090600064 SVEA5025RFE-Q 5 Degaussing coil...

  • Page 29: List Of Parts

    List of Parts List of Parts Qt.(Unit) Remark Location Material code Parts Name Type 10903800199 º ñ 1mm φ6.5 ´ ø ½ º 0090300091 Rubber washer 040(×è È ¼ 0090200452 clamp 0090501291 plastic bag 240*160 0094000202 CRT 37SX110Y22-DC05 W1006 0090400922 Wire JT2401-B0035Q W1007 0090400922 Wire JT2401-B0035Q...
  • Page 30 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type R317 0094100820 Resister RT13-1/6W-22Ω±5%------T R327 0094100820 Resister RT13-1/6W-22Ω±5%------T R111 0094100820 Resister RT13-1/6W-22Ω±5%------T R218 0094100797 Resister RT13-1/6W-33Ω±5%------T R282 0094100066 Resister RT13-1/6W-47Ω±5%------T R441 0094100066 Resister RT13-1/6W-47Ω±5%------T R418 0094100805 Resister RT13-1/6W-68Ω±5%------T R415 0094100783 Resister RT13-1/6W-82Ω±5%------T...
  • Page 31 List of Parts Qt.(Unit) Remark Type Location Material code Parts Name R918 0094100023 Resister RT13-1/6W-1KΩ±5%------T R908 0094100023 Resister RT13-1/6W-1KΩ±5%------T R540 0094100023 Resister RT13-1/6W-1KΩ±5%------T R611 0094100023 Resister RT13-1/6W-1KΩ±5%------T R541 0094100023 Resister RT13-1/6W-1KΩ±5%------T R198 0094100023 Resister RT13-1/6W-1KΩ±5%------T R199 0094100023 Resister RT13-1/6W-1KΩ±5%------T R221 0094100753 Resister RT13-1/6W-1.2KΩ±5%------T...
  • Page 32 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type RT13-1/6W-10KΩ±5%------T R253 0094100033 Resister R205 0094100033 Resister RT13-1/6W-10KΩ±5%------T R297 0094100033 Resister RT13-1/6W-10KΩ±5%------T R312 0094100033 Resister RT13-1/6W-10KΩ±5%------T R322 0094100033 Resister RT13-1/6W-10KΩ±5%------T R324 0094100033 Resister RT13-1/6W-10KΩ±5%------T R546 0094100033 Resister RT13-1/6W-10KΩ±5%------T R314 0094100033 Resister RT13-1/6W-10KΩ±5%------T...
  • Page 33 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type R578 0094102162 Resister RJ15S-1/2W-600-J------T R517 0094102162 Resister RJ15S-1/2W-600-J------T R572 0094100112 Resister RJ15S-1/2W-1K-F------T R573 0094101355 Resister RJ15X-1/2W-2.49kΩ±1%------R C269 0094201124 Capacitor CC1-06-CH-63V-33pF-J------F C270 0094201124 Capacitor CC1-06-CH-63V-33pF-J------F C207 0094201228 Capacitor CC1-06-CH-63V-56pF-J------F C208 0094201228 Capacitor CC1-06-CH-63V-56pF-J------F...
  • Page 34 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type C239 0094200043 Capacitor CD110-50V-1μF-M------F C226 0094200044 Capacitor CD110-50V-2.2μF-M------F C329 0094200044 Capacitor CD110-50V-2.2μF-M------F C315 0094200044 Capacitor CD110-50V-2.2μF-M------F C275 0094200992 Capacitor CD110-50V-4.7μF-M------F C240 0094200992 Capacitor CD110-50V-4.7μF-M------F C101 0094200992 Capacitor CD110-50V-4.7μF-M------F C210 0094200046 Capacitor CD110-50V-10μF-M------F...
  • Page 35 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type C246 0094201232 Capacitor CL11-100V-0.022μF-K------F C598 0094201739 Capacitor CT1-B-500V-3900PF-K------F C218 0094200738 Capacitor CL21X-100V-0.22μF-J------F C221 0094200738 Capacitor CL21X-100V-0.22μF-J------F C498 0094200738 Capacitor CL21X-100V-0.22μF-J------F C499 0094200738 Capacitor CL21X-100V-0.22μF-J------F C412 0094200738 Capacitor CL21X-100V-0.22μF-J------F C411 0094200738 Capacitor CL21X-100V-0.22μF-J------F...
  • Page 36 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type VD911 0094400049 Diode 1N4148------T VD572 0094400049 Diode 1N4148------T VD596 0094400049 Diode 1N4148------T DZ506 0094401618 Diode HZ3A2-T------T DZ294 0094400359 Diode RD5.1EB2------T DZ295 0094400359 Diode RD5.1EB2------T DZ296 0094400359 Diode RD5.1EB2------T DZ595 0094400359 Diode RD5.1EB2------T...
  • Page 37 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type L507 0094500547 Bend 3.5*5------F W318 0094101102 Jumper φ0.6mm/5mm------B C243 0094101102 Jumper φ0.6mm/5mm------B W407 0094101102 Jumper φ0.6mm/5mm------B W408 0094101102 Jumper φ0.6mm/5mm------B W402 0094101102 Jumper φ0.6mm/5mm------B C292 0094101102 Jumper φ0.6mm/5mm------B W495 0094101102 Jumper φ0.6mm/5mm------B...
  • Page 38 List of Parts Qt.(Unit) Remark Type Location Material code Parts Name R343 0094101103 Jumper φ0.6mm/7.5mm------B W246 0094101103 Jumper φ0.6mm/7.5mm------B W381 0094101103 Jumper φ0.6mm/7.5mm------B W101 0094101103 Jumper φ0.6mm/7.5mm------B W404 0094101103 Jumper φ0.6mm/7.5mm------B W401 0094101103 Jumper φ0.6mm/7.5mm------B W908 0094101103 Jumper φ0.6mm/7.5mm------B W221 0094101103 Jumper φ0.6mm/7.5mm------B...
  • Page 39 List of Parts Qt.(Unit) Remark Type Location Material code Parts Name W205 0094101104 Jumper φ0.6mm/10mm------B W207 0094101104 Jumper φ0.6mm/10mm------B W208 0094101104 Jumper φ0.6mm/10mm------B W498 0094101104 Jumper φ0.6mm/10mm------B W497 0094101104 Jumper φ0.6mm/10mm------B W701 0094101104 Jumper φ0.6mm/10mm------B W702 0094101104 Jumper φ0.6mm/10mm------B W316 0094101105 Jumper φ0.6mm/12.5mm------B...
  • Page 40 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type W319 0094101107 Jumper φ0.6mm/17.5mm------B W512 0094101107 Jumper φ0.6mm/17.5mm------B W215 0094101107 Jumper φ0.6mm/17.5mm------B W520 0094101107 Jumper φ0.6mm/17.5mm------B 0090100078 Rivet φ2.3mm*3.0mm 0090100079 Rivet φ1.6mm*3.0mm 0091800637 PX75106-----Q R1004 0094100132 Resister RT13-1/6W-180Ω±5%------T R1005 0094100020 Resister RT13-1/6W-470Ω±5%------T...
  • Page 41 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type R907 0094100719 Resister RY17-2W-270Ω±5%-20-C-A R206 0094100975 Resister RY17-2W-10KΩ±5%-20-C-A R521 0094102447 Resister RY17-2W-47KΩ±5%-20-C-A R515A 0094100101 Resister RY17S-2W-33K-J-05-E-A R511A 0094100101 Resister RY17S-2W-33K-J-05-E-A R927 0094100125 Resister RF10-2W-1Ω±5%-05-E-A R536 0094101109 Resister RF10-1W-1Ω±5%-12-C-A R535 0094101109 Resister RF10-1W-1Ω±5%-12-C-A...
  • Page 42 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type Z201 0094600082 Filter D38.9 U101 0094004532 Tuner ENV59D69F1B Z202 0094600245 Oscillator HC-49/U CAT24C08P(½ ø ¿ Ú N202 0094400636 TDA9361(½ ø ¿ Ú N201 0094401534 TC4053BP(½ ø ¿ Ú N401 0094400417 T902 0094500984...
  • Page 43 List of Parts Qt.(Unit) Remark Location Material code Parts Name Type 0090600012 Screw SJ2824-87 ST3*8F 0090100115 Heatsink MTBT2001BC--Q L7805CV(½ ø ¿ Ú N507 0094400450 Transistor 0090600012 Screw SJ2824-87 ST3*8F 0094000230 Power switch KDC-A04 0090401018 Mains cord JPRVVZ202DKDQ 0090400573 Wire JT23510D0095Q 0090202559 sleeve MTAS5015AN--Q...

  • Page 44: Damageable Parts List

    Damageable Parts List Damageable Parts List Material Parts Unit Price Reparation Code Name Type Qt.(unit) Rate(%) Remark 0094000012 Fuse T4A/250V 0.04 0094004532 Tuner ENV59D69F1B 4.96 0094100128 Resister RF10-2W-68-J-05-E-A 0.04 0094101082 Resister RF11-5W-5.1-J-17-L-A 0.04 0094101119 Resister RF10-1W-1Ω±5%-20-C-A 0.03 0094101171 Resister RF10-1W-2.2Ω±5%-12-C-A 0.03 0094101286 Resister RF10-2W-2.2Ω±5%-15-C-A 0.05...

  • Page 45: Information Of Resistors And Capacitors

    Information of Resistors and Capacitors Information of Resistors and Capacitors CAPACITORS RESISTORS & CAPACITORS-PARTS NO.CODE Notes: 1.part numbers are indicated on most mechanical parts. Please use this part number for parts orders. 2.The unit of resistance is (ohm).K=1000 ,M=1000K 3.The unit of capacitance is F(microfarad).

  • Page 46: Terminal View Of Transistors

    Terminal view of transistors Terminal view of transistors KSC815-YTA KSR1010TA KSA539-YTA KSR2010TA 2SD18887YD BC548-CTA KSC2331-YTA...
  • Page 47 Sincere Forever Tel: 86-532-8938356 Web site: http: //www.haier.com...

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