Haier HTAF21C Service Manual
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Haier HTAF21C Service Manual

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Order NO. LA2008HTAF21C
HTAF21C
@
(2007)(Haier Electronic Company Limited)
All rights reserved. Unauthorized copying and distribution is a
violation of law.
1

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Summary of Contents for Haier HTAF21C

  • Page 1 Order NO. LA2008HTAF21C HTAF21C (2007)(Haier Electronic Company Limited) All rights reserved. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered b electricity should be serviced or repaired only by experienced professional technicians.

  • Page 3: Waining

    1.Warning WARNING RISKELECTRIC SHOCK DONOT OPEN WARNING:To reduce the risk of electric shick don’t remove cover or back. No user-serviceable parts inside refer service to qualified service personnel. Safety of operators has been taken into consideration at the design and manufacture phase, but inappropriate operation may cause electric shock or fire.

  • Page 4: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS Read all of the instructions before using this appliance. When using this appliance, always exercise basic safety precautions, including the following: 1)Save these Instructions ---the safety and operating instructions should be retained for future reference. 2)All warning on the appliance and in the operating instructions should be followed. 3)Cleaning --- Unplug from the wall outlet before cleaning.

  • Page 5: Specifications

    (Including amplifiers) that product heat. 16)Overloading ---Do not overload wall outlets and extension cord as this can result in a risk of fire or electric shock. 2. Specification Model HTAF21C Screen size 20 inch Aspect ratio NO.of preset channels...

  • Page 6: Features And Techinical Description

    3. FEATURES AND TECHINICAL DESCRIPTION 1. N201 UOC TDA8377 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...
  • Page 7 GND1 ground for TV processor CVBS/Y CVBS/SVHS(Y) input CHROMA SVHS (C) input AUDOUT Audio output INSSW2 YUV insertion input R2/VIN R input / V (R-Y) input / PR input G2/YIN G input / Y input B2/UIN B input / U (B-Y) input / PB input BCLIN Beam current limiter input BLKIN...

  • Page 8: Adjustment

    GND(out 1) Ch 1Ground Volume Control Out 1 (-) Ch 1 output (-) Out 2 (-) Ch 2 output (-) Standby Mute input GND(out 2) Ch 2 Ground In 1 Ch 1 input Out 2 (+) Ch 2 output (+) 4.
  • Page 9 AGC Adjustment Receive 60dBμ (1mV) VH colour bar pattern signal. Select TOP item. Adjust value, to noise reduce gradually and just disappeared point. CRT cut off and white balance adjustment a) CRT cut off adjustment 1. Select item VG2B, then adjust value to 32. 2.
  • Page 10 1COL Soft: Colour 1SHP Soft: Sharpness “6” Picture preset 2 2CON Standard: Contrast 2BRI Standard: Brightness 2COL Standard: Colour 2SHP Standard: Sharpness 3CON Dynamic: Contrast 3BRI Dynamic: Brightness 3COL Dynamic: Colour 3SHP Dynamic: Sharpness NOTE: THE ITEMS WITH REMARK “A” IS ADJUSTABLE DATA. Optional data Function Description...
  • Page 11 Bit 4 OSD STABLE 1=Enable Bit 3 Y PB PR 1=Enable Bit 2 Blue/Black BACK 1=blue 0=black Bit 1 BH2004D 1=Enable Bit 0 WOOFER 1=Enable 4. OP4 Function Description Preset Remark Bit 7 RESERVE 1=Enable Bit 6 VCHIP 1=Enable Bit 5 RESERVE 1=Enable Bit 4...

  • Page 12: Circuit Explanation

    5．CIRCUIT EXPLANATION 1. N201 UOC TDA8377 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...
  • Page 13 GND1 ground for TV processor CVBS/Y CVBS/SVHS(Y) input CHROMA SVHS (C) input AUDOUT Audio output INSSW2 YUV insertion input R2/VIN R input / V (R-Y) input / PR input G2/YIN G input / Y input B2/UIN B input / U (B-Y) input / PB input BCLIN Beam current limiter input BLKIN...

  • Page 14: Test Point Waveforms

    GND(out 1) Ch 1Ground Volume Control Out 1 (-) Ch 1 output (-) Out 2 (-) Ch 2 output (-) Standby Mute input GND(out 2) Ch 2 Ground In 1 Ch 1 input Out 2 (+) Ch 2 output (+) 4.

  • Page 15: Maintenance Service And Trouble Shooting

    7. IC voltages TDA8377 0.18 0.17 TDA8357 AN 7522N 2.75 0.35 24C08/PCF8598 6．MAINTENANCE SERVICE AND TROUBLE SHOOTING...

  • Page 16: Circuit Diagram And Wiring Connection Diagram

    7. CIRCUIT DIAGRAM AND WIRING CONNECTION DIAGRAM...
  • Page 17 MENU TV/AV TJC3-2Y AV1-VINAV1-ALAV1-AR CNS01 RS01 CT01 CNB02 RT02 RS03 CNS02 RB05 RB04 RB03 RB02 RB01 CNB01 1.8K 1.2K CNT01 TJC3-2Y 1/6W-100 TJC3-10A A6-5V R208 A6-5V N202 R215 R278 R222 R286 R220 R212 R211 24C08 CN704 CN200 A6-5V 3.3K 3.3K CN703 3.3K 3.3K...
  • Page 19 Sincere Forever Haier Group Haier Industrial Park, No. 1, Haier Road 266101,Qingdao,China http://www.haier.com...

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