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Related Manuals for Haier 21F8A
Summary of Contents for Haier 21F8A
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Page 1: Colour Television
COLOUR TELEVISION SERVICE MANUAL Models 21F8A (Thailand) Features BUS CONTROL Child lock Auto search 218 program presetting and memory ON-TIME,OFF-TIME,APPOINTING PROGRAMME REAR AUDIO/VIDEO INPUT Serial Number: M-MR-AE-21F8A-8829B Version:00.00 Edition: 2006-3-21 COLOR TELEVISION Model: 21F8A... - Page 2 2W 270 100u/35V 0.22 0.22 470P OPEN HZ15C 1000u/25V 2SD400 1SS133 C531 C510 AC400V2200p R590 C448 HEAT 0.47u R573 1.2k FBT29 AUDIO GND 5W 3.9 33u160V C431 VD562 0.056u200V HZ10 21F8A NOTE: Design and specification are subject to change without notice.
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Page 3: Table Of Contents
CONTENT CONTENT Contents…………………………………………………………………………1 Product code illumination and series introduction………………………2 3 ． Fe a t ure s … … … … … … … …… … … … … … … … … … … … … … … … …3 4．... -
Page 4: Product Code Illumination And Series Introduction
Product code illumination and series introduction Product code illumination and series introduction Color television appearance Pure Flat tube CRT catercorner 21inch... -
Page 5: Features
FEATURES 3. FEATURES 序号 序号 FUNCTION FUNCTION NO. of built-in speakers Main IC 8829B Audio output power(W) 7W+7W Pure Flat Total power input（W） Color system Voltage range（V） 90-250V Audio system Power frequency（Hz） 50/60HZ NO.of channels Time of sleep timer(MINS) 120MIN OSD language ENGLISH / Thai √... -
Page 6: Safety Precaution
Safety Precautions 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 7: Warning And Cautions
Warning and Cautions 5. 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 8 Warning and Cautions NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1) Always unplug the receiver AC power cord from the AC power source before: a.
- Page 9 Warning and Cautions components are usually called Electrostatic ally Sensitive (ES) Devices. Examples of typical ES 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.
- Page 10 Warning and Cautions 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 11 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 12 Warning and Cautions pin. Solder the IC connection. 4) 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.
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Page 13: Net Dimension
Net Dimension 6. Net Dimension 21F8A... - Page 14 Remote Function 7 .Remote...
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Page 15: Program Diagram
Program Diagram 8.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. If no picture appears, press the button on the remote controller. - Page 16 Maintenance Service and Trouble shooting Specifications Variable Item Default Value Mark RCUT RED CUT OFF BALANCE GCUT GREEN CUT OFF BALANCE BCUT BLUE CUT OFF BALANCE GDRV GREEN DRIVE BALANCE BDRV BLUE DRIVE BALANCE CNTX CONTRAST MAX VALUE BRTC BRIGHTNESS COLC NTSC COLOUR CENTER VALUE TNTC...
- Page 17 Maintenance Service and Trouble shooting Specifications Variable Item Default Value Mark HAFC HORIZONTAL AUTO FREQUENCY CONTROL 25 PERCENT OF VOLUME 50 PERCENT OF VOLUME V100 100 PERCENT OF VOLUME MUTT Y-MUTE SOFT START FLG0 FLAGS FOR IF FLG1 FLAGS REFP REF Pulse Position RSNS R SENS...
- Page 18 Maintenance Service and Trouble shooting No raster and no sound Check the fuse Abnormal Normal Check VD503∼VD506 V513 C507 Check loading voltages of 127V 200V Normal Abnormal Check if the connector electrode Check if all loading resistors are normal Abnormal Normal Abnormal Normal...
- Page 19 Maintenance Service and Trouble shooting No raster Check if G2 voltage on CRT board is normal Normal Abnorma Check heater voltage Check the base electrode voltage of V444 Abnormal Normal Normal Abnormal Check heater voltages of pins resister Check the voltage betwecn Check circuit at X602...
- Page 20 Maintenance Service and Trouble shooting Horizontal bright line Break R908 , let multimeter preset on R 1K and red meter rod grounding, let black meter rod tap pin 4 at N402.see if the bright line can wide at instant. Check if R907 R448 are There is breakdown in the vertical output rosin joint and the resistor grate...
- Page 21 Maintenance Service and Trouble shooting Picture OK, no sound Break C700,let red meter rod ground and let black meter rod tap pin6 at N701, the speakers has snapping. If power amplifier is normal , Break the connector electrode of check N201 sound IF circuit and V701, let the black meter rod tap pin N201.
- Page 22 Maintenance Service and Trouble shooting RASTER OK, NO PICTURE, NO SOUND Whether there are noise dots? Whether there are voltages in Check RAGC item of IC bus is every pin of tuner set “00”. Use the remote controller and Check picture IF channel enter S-MODE and adjust and V231, V212, N201 RAGC to near 2D...
- Page 23 Maintenance Service and Trouble shooting No CH WORDS There is black words? Check L902,C926,C925 Check the circuit between pin 22pin 24 Abnormal Normal Check circuit between Replace V922,R915,C450 and pin 5 at FBT. compartments...
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Page 24: Circuit Diagram
10. Circuit diagram R L GND XS805 A101 TUNER-FS N601 TDA7057AQ R553 C111 C110 N121 R110 C101 0.1u 2W12K 4.7u upc574J 5.6K 4.7u +130V R119 JUMP5 +15V L102 15uH (OPEN) JUMP6 (OPEN) C105 JUMP1 R101 C630 C631 VD101 470uH 470u/25V 0.01u (SHORT) 1SS133... -
Page 26: Circuit Explanation
Circuit Explanation Circuit Explanation IC function pins 1) Integrated circuits used in this model TMPA8829B VIF SIF VIDO Signal processing RGB/output circuit,Scan Circuit,CPU. LA7841 Vertical scan circuit. 3 TDA7057 Sound power amplify circuit. 2) IC functions and parameters Pins of IC N402 LA7841 Reference resistor K... - Page 27 Circuit Explan Reference resistor K Reference Function voltage V Position Negative Ground Audio input 0.76 Ripple filt 0.78 No used N204 TMPA8829B Reference voltage V Reference resistor Function POSITION NO signal Ssignal Negative Band 1 2000 Band 2 2000 Keyboard Data ground CPU reset CPU clock...
- Page 28 Circuit Explanation Reference voltage V Reference resistor Function POSITION NO signal Ssignal Negative Cr input 2000 TV data 2000 C input 2000 Video input 2 Tv power supply 2000 Video input 2 15000 ABCL 15000 Sound output +9Vpower supply 2. 8 2000 PIF output 2000...
- Page 29 Circuit Explanation Reference voltage V Reference resistor Function POSITION NO signal Ssignal Negative +5V power supply R output 1000 G output 1000 B output TV analogy ground 2000 Ground 1300 +5V power supply 2000 Mute 2000 C data 12500 C serial 12500 System control 12500...
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Page 30: 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: 1) +B: 127 ± 0.3V adjustment. A) Switch on the power and connect PAL circular signals to the tuner. B) Adjust variable resistor RP501 until the voltage of the main power is 127±0.3V. -
Page 31: Damageable Parts List
Damageable Parts List Damageable Parts List Location Material code Part name Type Q’ty Reparation F501 0094000150 Fuse T4.0A/250V A101 0094005862 Tuner TD05EFS-01 0094005522 Remote controller HTR-054 R920 0094102639 Resister RF10-2W-2.4¦ XZ601 0094300007 CRT Socket GZS10-2-BD 0094400305 N401 LA7841 0094401788 N204 8829B N902 0094400808... -
Page 32: Information Of Resistors And Capacitors
Information of Resistors and Capacitors 14 . 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 33 Terminal view of transistors Terminal view of transistors KSC815-YTA KSR1010TA KSA539-YTA KSR2010TA 2SD18887YD BC548-CTA KSC2331-YTA...
- Page 34 Sincere Forever Haier Group Tel: 86-532-8938356 Web site: http: //www.haier.com...