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Summary of Contents for Haier HTN20R15
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Page 1: Colour Television
COLOUR TELEVISION SERVICE MANUAL Models HTN20R15 Features C BUS CONTROL AUTO SEARCH 181 PROGRAM PRESETTING AND MEMOREY ON-TIME,OFF-TIME,APPOINTING PROGRAMME CCD & V-CHIP SIDE/ BACK AUDIO/VIDEO INPUT COLOR TELEVISION Model: HTN20R15 TV-8888-67... -
Page 2: Table Of Contents
CONTENT CONTENT Contents……………………………………………………………………..1 2． Features…………………………………………………………………..2 3． Safety Precaution…………………………………………………….3 4． Warning and cautions………………………………………………….4 5． Net Dimension…………………………………………………………..10 6． Parts and Functions……………………………………………………11 7． Remote controller Functions…………………………………………12 8． Program Diagram……………………………………………………….13 Maintenance Service and Trouble Shooting……………………19 Circuit Diagram…………………………………………………………23 Circuit Explanation……………………………………………………..26 Adjustment……………………………………………………………….36 Exploded View…………………………………………………………..37 List of Parts………………………………………………………………38 Damageable Parts List…………………………………………………54 Information of Resistors and Capacitors………………………….55... -
Page 3: Features
FEATURES 2. FEATURES 序号 序号 FUNCTION FUNCTION NO. of built-in speakers Main IC OM8377 Audio output power(W) SF picture Total power input（W） Color system NTSC3.58 Voltage range（V） 120V Audio system Power frequency（Hz） 60HZ NO.of channels Time of sleep timer(MINS) 120MIN OSD language ENGLISH、FRENCH、SPANISH Net weight(KG) -
Page 4: Safety Precaution
SAFETY PRECAUTIONS 3. SAFETY PRECAUTIONS INPORTANT SAFETY NOTICE These parts are identified by many electrical and mechanical parts in this chassis have special safety-related characteristics. 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 4．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 Warning and Cautions Explanation on the display tube Generally, it is not needed to clean the tube surface. However, if necessary, its surface can be cleaned with a dry cotton cloth after cutting off the power. Don’t use any cleanser. If using hard cloth, the tube surface will be damaged.
- Page 7 Warning and Cautions solid-state device heat sinks are correctly installed. 8. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. 9. Use with this receiver only the test fixtures specified in this service manual. CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.
- Page 8 Warning and Cautions General Soldering Guidelines 1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range of 500 F to 600 2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.
- Page 9 Warning and Cautions Carefully bend each IC lead against the circuit foil pad and solder it. Clean the soldered areas with a small wire-bristle brush.(It is not necessary to reapply acrylic coating to the areas). “Small-Signal” Discrete Transistor Removal/Replacement Remove the defective transistor by clipping its leads as close as possible to the component body.
- Page 10 Warning and Cautions 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top. 3. Solder the connections CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.
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Page 12: Parts And Functions
Parts and Functions 6.Parts and Functions Front Side AV inputs MENU TV/AV VOL- VOL+ VIDEO AUDIO 10.VIDEO:Video input 11.AUDIO:Audio input Rear 1. Menu: Access/Exit Main M (Menu) 2. TV/AV:TV/AV selection 3. VOL-: Decrease sound 4. VOL+: Increase sound 5.CH-: Select next lower channel 6.CH+: Select next higher channel VIDEO AUDIO... -
Page 13: Remote Controller Functions
Remote Controller Functions 7.Remote Controller Functions Remote Control Functions Remote Control Functions MENU VOL- VOL+ -/-- RECALL TV/AV MUTE EXIT DISPLAY P.STD : Power on/off 2. MENU: Access/Exit Main M 3. CH+/-: Select next higher or lower channel 4. VOL+/-: Increase or decrease sound 5. -
Page 14: Program Diagram
Program Diagram 8. Program Diagram I. REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing memory IC, be sure to use IC written with the initial value of data. 2. - Page 15 Program Diagram II. Technical properties and requirements 1. Main performance index 1. Screen diagonal: 54cm 2. Receiving system: NTSC-M 3. Receiving channel: VHF-channel 2~13 UHF-channel 14~69 CATV-channel 1~125 4. Antenna input: 75ΩF plug 5. Picture limit noise sensibility: VHF≤51dB（μV） UHF≤54dB（μV） 6.
- Page 16 Program Diagram On/Off button on the TV set or the remote controller is pressed, the TV set is started. 2． When the MENU button on the remote controller is pressed, the menu will appear on the screen. The CH and VOL buttons are used for setup.
- Page 17 Program Diagram the remote controller for option of AV/TV. 8． Press MENU button again to quit the main menu. TIME setup 1． Press MENU button and the main menu appear on the screen. 2． Press CH+ or CH- button to move the icon for TIME setup. The designated CLOCK under the icon will turn bright green.
- Page 18 Program Diagram 1． Press MENU button, the menu will appear on the screen. Press RATING button, V-CHIP displays the menu. 2． Press CH+ or CH- button to move the icon to another option, then the designated item will turn bright red. 3．...
- Page 19 Program Diagram press MENU button (for some line) and then VOL+ or VOL- for option of desired line. Finally press MENU button. （3） Some item can be deleted by following the same process above. 4． Press RATING button again to quit V-CHIP menu. MPAA RATING 1．...
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Page 20: Maintenance Service And Trouble Shooting
Maintenance Service and Trouble Shooting 9. Maintenance Service and Trouble Shooting 1 TROUBLESHOOTING PROCESS No light and sound Check to see if Fuse3 is normal Abnormal Normal Check to see 103V Check VD504, C507, etc. voltage is normal V513, etc. Normal Abnormal Check to see if the... - Page 21 Maintenance Service and Trouble Shooting No raster Whether G2 voltage is normal Abnormal Normal Check heating voltage Check base voltage H-drive Normal Abnormal Normal Abnormal Heater Resistor Check to see if b.e Check the circuit Check the voltage open voltage of V433 is from pin13 of N201 to of all pins of XP902 existed?
- Page 22 Maintenance Service and Trouble Shooting Horizontal bright line Make R451 open. Multimeter is at range RΧ1K. Red probe connects to ground. Touch No.5 of N401 with black probe. Bright line flashes for a moment There is trouble in V-output circuit There is trouble in V-circuit Check Check the voltage at Pin2 of N401...
- Page 23 Maintenance Service and Trouble Shooting Lack of red Check to see if V902 is open or not well welded Change V902 or Check to see if voltages of XP902 weld V902 again are normal Replace CRT、 Check ircuit between Pin19 of N201 and XS202 Picture exists but no sound Cut of C601，connect red pen of multi-meter(R*1K)with...
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Page 24: Circuit Diagram
Circuit Diagram 10. Circuit Diagram Pane hint picture Sound Power Amplifier Picture/Sound IF Amplifier, Video and audio signal Processing, RGB Output Circuits and H &V Sync pulse Horizontal Scan segregation Output Vertical Scan Output Main Processor Audio/Video In/Out Infrared Receiver Remote Controller Figure 5... - Page 25 C403 C802 500V-470pF VD812 VD402 H-OUT 50v-47u PC801 VD401 IN4004 C404 R849 IN4004 25V-470uF PC817C PG2010 A3-15.8V 185v 1/6W-10K HTN20R15-circuit diagram V401 A6-5V R818 1N4148 2SD2499 1/2W-1.5K T401 C419 R816 R407 RP801 AA26-50001B 125v 1/2W-123K VD816 1/2W-0.39 C803 2KV-681 MF72-2-5Ω±N...
- Page 26 PCB Diagram PCB Diagram...
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Page 27: Circuit Explanation
Circuit Explanation 11. Circuit Explanation 1. Principle integrated circuits A1. HTN20R15 color TV set composed of the following sections (1) Small signal processing: super monolithic integrated circuits N201(OM8377). and memory N202 (AT24C08). (2) Sound power amplifying: integrated circuits N601 ( AN7523). - Page 28 Circuit Explanation Control keys input *3 Sound Volume control PWM output MUTE Sound mute output VSSC/P Digit ground for µ-controller core and periphery BAND1 Tuner Band selection output BAND2 Tuner Band selection output VSSA Analog ground of teletext decoder and digital ground of TV-processor SECPLL SECAM PLL decoupling supply voltage TV-processor(+8V)
- Page 29 Circuit Explanation B2/UIN B input / U (B-Y) input / P input BCLIN beam current limiter input BLKIN black current input / V-guard input Red output Green output Blue output VDDA analog supply of Closed Caption decoder and digital supply of TV-processor (3.3 V) OTP Programming Voltage VDDC digital supply to core (3.3 V)
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Page 30: Test Point Waveforms
Circuit Explanation Pin No. 5: Control keys input (Max. Limit voltage) Function TV/AV MENU VOL- VOL+ Voltage 0.4125 0.825 1.2375 1.65 2.0625 AN7522/7523 Function : audio output Symbol Function Symbol Function Power supply ground Out 1 (+) Ch 1 output (+) In 2 Ch 2 input GND(out 1)