Haier HTX21S31, Service Manual

Page 1: ...NO M LA EC 2199 76812 Edition 2002 12 30 HTX21S31 COLOR TELEVISION Service Manual Haier Features PAL M N NTSC M Front Audio Video input V CHIP CCD 181 Channel Haier Group MODEL HTX21S31 ...

Page 2: ...s 5 6 Net dimension 11 7 Parts and Functions 12 8 Remote Controller Functions 13 9 Program Diagram 14 10 Maintenance Service and Trouble shooting 15 11 Circuit Diagram 18 12 Circuit Explanation 22 13 Adjustment 24 14 Exploded View 27 15 List of Parts 28 16 Damageable Parts List 41 17 Information of Resistors and Capacitors 41 CONTENTS ...

Page 3: ...2 2 Product Code illumination and Series Introduction H T X 21 S31 Haier Toshiba CRT size unit inch Color television appearance Product Code illumination and Series Introduction ...

Page 4: ...listening 12 Left right balancer 35 Background light 13 NICAM 36 Auto timer on 14 Multi audio modes 37 CCD 15 Tone adjuster 38 SOFTWARE V CHIP 16 MTS SAP 39 Number of built in speakers 2 17 AUDIO Auto volume leveling 40 Audio output power W 2 18 AV input Front 1 41 Total power input W 70 19 AV output 42 Voltage range V 90VAC 250V AC 20 DVD terminal 43 Power frequency Hz 60 21 S video jack 44 Time ...

Page 5: ...aged by accidental shorts of the circuitry that might be inadvertently introduced during the service operation If any fuse or Fusible Resistor in this TV receiver is blown replace it with a specified one When replacing a high wattage resistor Oxide Metal Film Resistor over 1W keep the resistor 10mm away from PCB Keep wires away from high voltage or high temperature parts Due to the high vacuum and...

Page 6: ...lease place it on a ventilated place 5 Don t open the backcover otherwise it is possible to damage the components in the TV set and harmyou 3 Don t place the TV set in the sunshine or near heatsource 6 When the TV set isn t going to be used for long time or it is in thunder and lightening please pull out the plug fromAC outlet and the antenna plug from the cover ofthe TVset Explanation on the disp...

Page 7: ...ch the other end of the insulated clip lead to the picture tube anode button using an insulating handle to avoid personal contact with high voltage 4 Do not sprays chemicals on or near this receiver or any of its assemblies 5 Unless specified otherwise in this service manual clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner cotton tipped stick or ...

Page 8: ... to install it Most replacement ES devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of a replacement ES device touch the protective material to the chassis or circuit assembly into which the device will be installed CAUTION Be sure no power is applied...

Page 9: ...und hole use the standard technique as outlined Removal Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement Carefully insert the replacement IC in the circuit board Carefully bend...

Page 10: ...omponent and adjacent components and the circuit board to prevent excessive component temperatures Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds foil to the circuit board causing the foil to separate from or lift off the board The following guidelines and procedures should be followed whenever this condition is ...

Page 11: ...condition will not exist if the jumper wire opens 2 Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern 3 Connect insulated 20 gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side Carefully crimp and s...

Page 12: ...11 6 Net dimension Haier Net dimension ...

Page 13: ...９ １０ １ Ｃ ａ ｂ ｌ ｅ ＴＶ Ａ ｎ ｔｅ ｎ ｎ ａ Ｈ ｏ ｏ ｋｕ ｐ TV Rear Panel 1 ANT １ １ Picture Tube AV Left Speaker TV AV alteration button Menu button Volume up down button Channel up down button input Front 11 Right speaker Audio R input Power indicator Power switch Parts and Functions ...

Page 14: ...l ectB utton 6 P ersonalP reference S el ect 7 C hannel S el ectB utton 8 M enu S el ectB utton 9 A udi o S el ectB utton 10 D i rectA ccess C hannelS el ect 11 T V AV InputB utton 12 M ute B utton 13 S l eep Ti m er 14 S Y S T E M sel ecti on 1 2 3 6 5 4 7 8 9 0 M EN U RECALL RATI NG C H V O L C H SO U N D P S TD 1 2 3 4 5 6 7 8 9 TV AV D I SP S Y S Remote Controller Functions ...

Page 15: ...key to select the bar auto search then press the to make sure If you want to stop press the key 2 Deleting channel number Press channel up down buttons to select a channel to skip Press MENU to call up the PREST menu on the screen Then Press the item to select the bar Add Delete then use the key to select Add or Delete B Volume tuning Press VOLUME buttons VOL to decrease and VOL to increase the vo...

Page 16: ...STEREO VCO 0 63 No used 20 FILTER SET 0 63 No used 21 SAP VCO 0 63 No used 2 Setting item explanation OSD Function 0 LA76814 LA768 12 0 select LA76814 1 select LA76812 1 SAP IC SELECT 0 TDA9850 1 CXA2104 2 TDA9855 3 UPC1815B 2 SUB CONT Sub contrast 0 31 3 SUB COLOR Sub color 0 63 4 SUB SHARP Sub sharpness 0 31 5 SUB TINT Sub tint 0 63 6 BLK STR DEF Black level stretch 0 on 1 off 7 AFC GAIN AFC gai...

Page 17: ...input 33 POSITION L R 0 Logo display on left top of screen 1 Logo display on right top of screen 34 BLUE BACK 0 No blue background without signal 1 Blue background without signal 35 BLACK BACK 0 No background changing channel 1 Background changing channel 36 STEREO OPTION 0 No stereo 1 Stereo 37 WOOF H PHONE No used No used 38 WOOF VOL OPT No used No used 39 SENSITIVITY No used No used 40 V MUTE P...

Page 18: ... voltage of V552 or CPU power The failure of horizontal unit or N551 N552 Normal Normal Normal Abnormal Checktosee110V 180V etc voltageisnormal T esttoseeallterminal Resistanceofload Isnormal Check powerunit Check to see if rectifying tube is normal Change rectifying tube Check the Loader Abnormal Normal Abnormal Normal Abnormal Normal Abnormal Maintenance Service and Trouble shooting ...

Page 19: ...18 11 Circuit Diagram Circuit Diagram ...

Page 20: ...35V1000 C441 200V0 33U C207 100V0 01 R114 1 6W100K R760 1 6W22K R740 1 6W4 7K R729 1 6W150K SW701 CH B6 12V C939 2KV1000 XS901 GZS8 6 4F XS501 TJC2 2A VD504 RM11C C565 25V1000 C551 2KV470 L442 101K R127 1 6W330 R718 2W10K R205 1 6W22K R816 X R272 1 6W3K VD601 1N4148 VD701 BT205 L R722 1 6W1 5K B901 3W16OHM R461A 1 2W120 R451 1 6W5 6K C122 63V0 01U R108 1 6W5 6K R765 1 6W22K R744 1 6W220 R737 X R70...

Page 21: ...lifier Video and audio signal Processing RGB Output Circuits and H V Sync pulse segregation SAW Sound Power Amplifier Main Processor Infrared Receiver Remote Controller ROM Audio Video In Out Horizontal Scan Output Vertical Scan Output CRT Antenna Tuner I2 C BUS Circuit Block Diagram ...

Page 22: ...21 PCB ...

Page 23: ... 29 I2C bus control 1 5 9 Ground 0 30 I2C bus control 1 4 99 10 Scl 1 47 31 Connect to 5V via a resistor 5 03 11 sdl 2 2 32 Connect to 5V via a onnect to 5V via a resisto 5 04 12 Power supply 4 99 33 Connect to 5V via a resistor 5 03 13 Key input 0 24 34 遥控接收 0 03 14 AFT in 2 77 35 Connect to 5V via a resistor 5 02 15 AGC in 1 7 36 Connect to 5V via a resistor 5 01 16 n c 1 7 37 mute 0 11 17 Reset...

Page 24: ...12 Bus clock 4 85 39 APC1 filter 3 2 13 ABL 4 76 40 Selected video output 2 43 14 R input 3 92 41 Video chroma deflection 0 15 G input 0 14 42 Ext video input 2 55 16 B input 0 15 43 Power 5 17 Fast blanking input 0 08 44 Int video input 2 77 18 RGB Vcc 7 94 45 Black stretch filter 2 6 19 R output 2 21 46 Video input 2 12 20 G output 2 36 47 APC filter 3 5 21 B output 2 28 48 VCO coil 4 3 22 H syn...

Page 25: ...weep generator to IF test top in PCB b Adjust T101 and make digital multi meter display 3 6V 0 05V PIF TP top can only connect to multi meter Alignment and check a Connect main PCB with alignment tool input factory adjustment signal and turn TV on Adjust screen control on FBT and make screen brightness relevant receive 525 line monoscope adjust focus control on FBT and make focus relevant b Pre ad...

Page 26: ...oise press FACTORY button and enter service mode adjust RF AGC value and make the noise just disappear press FACTORY button and exit service mode White balance adjustment Turn TV on receive white field signal and make the probe of white balance adjustment instrument touch with top and bottom of screen fully Check if values of R G B are standard if not press FACTORY button make B W BALANCE menu dis...

Page 27: ...TORY button to enter service mode and adjust vertical size vertical linearity vertical center horizontal center make them standard Alignment parameter table Press FACTORY button on service remote controller and enter service mode 1 Adjustment mode and2 Setting mode Use CH or CH button up down pages to select items that you need adjust use VOL or VOL button Adjustment ...