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Haier DX-RCRT20-09 Service Manual

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DX-RCRT20-09
(2007)(Haier Electronic Company Limited)
All rights reserved. Unauthorized copying and distribution is a
violation of law.
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Summary of Contents for Haier DX-RCRT20-09

  • Page 1 DX-RCRT20-09 (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: Specifications

    1. Specification MODEL MODEL FUNCTION 21TA1 FUNCTION 21TA1 ITEM ITEM Main IC R2J10165GF 24 Digital curtain × flat Slow fading on & off × NTSC+ATSC 26 × Color system Semitransparent menu Non-flshing channel √ PICTURE Audio system changing NO.of channels ZOOM √...

  • Page 4: Waining

    2. Warning 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 5: 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 6 General Servicing Precautions 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. b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection.
  • Page 7 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. 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 8 b. Heating the component lead until the solder melts. c. Quickly 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.
  • Page 9 circuit board and crimp the “U” with long nose pliers to insure metal to metal contact then solder each connection. Power Output, Transistor Device 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.
  • Page 10 2. Carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern. 3. Bend a small “U” in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection. 4.

  • Page 11: Features And Techinical Description

    3. FEATURES AND TECHINICAL DESCRIPTION FUNCTIONS: 1.181 channels C bus control 3. Auto scan 4.Audio/video input/ output interfaces 5. Multiple picture modes selection 6.Blue screen 7 NTSC + ATSC 8.CCD 9. SLEEP TIMER 10.Q.VIEW 11. V-CHIP 12. ARC (LETTERBOX/ZOOM / FULL) 4.
  • Page 12 0 ~ 127 ★ Black level offset B 0 ~ 127 Aassistant brightness adjust ★ 0 ~ 1 [field surge stop choice] ★ Horizontal line choice WB BRI 0 ~ 127 brightness ★ Horizontal line P3： Items Preset Remark Description RB YUV -128~ 128 IN YUV，...
  • Page 13 P7： Items Preset Remark Description ON DLY T 0 ~ 15 № Power on black screen time；0-15s AVS MUTE TIM 0 ~ 255 № Change channal black screen time;10ms LOGO COLOR 0 ~ 7 1 № Label color choice LOGO 0 ~ 1 №...

  • Page 14: Wiring Connection Diagram

    U DL 0 ~ 3 № U signal delay adjust V DL 0 ~ 3 № V signal delay adjust LCNR 0 ~ 63 № Down pillow shape distortion P11： Items Preset Remark Description C TRAP № Color trap wave adjust H VCO 0 ~ 7 №...

  • Page 16: Circuit Explanation

    6. Circuit Explanation 1、Microprocessor and Small signal processing: super monolithic integrated circuits ： R2J10165GF R2J10165GF is an integrated circuit decoder, containing intermediate image amplifying, horizontal and vertical scan, small signal processing, color decoding, C bus control. Information introducing functions and testing data for maintenance is listed in Table 1.
  • Page 17 5.7V REG OUT 5.7V POWER OUT 8.71 25.5K VIF VIDEO OUT VIF VIDEO OUT 4.05 0.49K VIF GND VIF APC VIF APC 2.30 28.3K RF AGC RF AGC 4.70 VIF IN2 VIF IN2 1.46 VIF IN1 VIF IN1 1.46 VIF AGC VIF AGC 4.81 VIF VCC F/B...
  • Page 18 P13/SDA1 C-bus data line 1 3.52 10.7K P14/SDA2 C-bus data line 2 3.85 9.5K 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 UV101, are processed for tuning and high frequency amplifying and mixing, then an analog IF signal will go through the sound surface wave filter.

  • Page 19: Maintenance Service And Trouble Shooting

    5. Analysis of horizontal sync and horizontal scan output circuits As the horizontal oscillation circuit is installed inside IC201 (R2J10165GF), . Some brightness signals including compound sync signals are transmitted to the internal sync segregation circuits, where horizontal sync and vertical sync pulses are segregated.
  • Page 20 A3. Error Detection Process No light and sound Check to see if Fuse is normal Abnormal Normal Check to see 110V、180V Check D901~D904, etc. voltage is normal C914, IC901, Q901 etc. Normal Abnormal Check to see if the T est to see all terminal collector voltage of Resistance of load D909 is 13.5V...
  • Page 21 No raster Whether G2 voltage is normal Abnormal Normal Test filament voltage Test the base voltage of Q402 Normal Abnormal Normal Abnormal Check to see if be Heater Resistor Check the circuit Check the voltage open voltage of Q402 is from pin15 of IC201 of all pins of SK501 existed?
  • Page 22 Horizontal bright line Make R429 open. Multimeter is at range RΧ1K. Red probe connects to ground. Touch No.5 of IC401 with black probe. Bright line flashes for a moment Check to see if voltage of pin2 at Check to see if the voltage of IC401 is normal pin 11 and pin12 of IC201 is normal...
  • Page 23 Picture exists but no sound Make C713/C714 open. Multimeter is at band RΧ1K. Red probe connect to ground. Touch No.6 OR No.8 of IC701 with No noise Have noise Make C713 OR C714 collector Power amplifier is abnormal. open. Touch No.6 OR No.8 of Inspect IC701 and peripheral Q702 with black probe to see if components of IC701...

  • Page 24: Circuit Diagram

    Troubleshooting Before calling service personnel, please check the following chart for a possible cause to the trouble you are experiencing. Symptom Check these things TV is not Be sure the power cord is plugged in. turned on The MUTE function may be used. Good picture , Adjust the volume of the TV set.
  • Page 27 Sincere Forever...

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