Haier HTN19R12 Service Manual Download Page 25 | Manualshive

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11. Circuit Diagram

1.

Pane hint picture

Circuit Diagram

Picture/Sound IF Amplifier,

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

Figure 5

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Summary of Contents for HTN19R12

Page 1: ...per flat picture tube Auto search 181 program presetting and memory CCD V CHIP HTN19R12 HTN19R12S COLOUR TELEVISION Service Manual MODEL HTN19R12 HTN19R12S America Haier Group NO M MR AE HTN19R12 76814 Edition 2004 4 17 ...

Page 2: ... 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 21 12 Circuit Explanation 24 13 Adjustment 31 14 Exploded View 33 15 List of Parts 34 16 Damageable Parts List 49 17 Information of Resistors and Capacitors 50 CONTENT ...

Page 3: ...2 Product code illumination and series introduction HTN 19 R12 Color television appearance CRT catercorner 20inch 51cm Appearance serial Product code illumination and series introduction BRAND ...

Page 4: ...al curtain 25 Slow fading on off 26 Semitransparent menu 27 Non flshing channel changing 28 ZOOM 29 16 9 mode 30 Games 31 Calendar 32 Child lock 33 Multi functional lock Y 34 No picture listening 35 Background light 36 Auto timer on 37 CCD Y 38 SOFTWARE V CHIP Y 序号序号序号序号 FUNCTION 39 NO of built in speakers 1 40 Audio output power W 2W 41 Total power input W 70W 42 Voltage range V 120V 43 Power ...

Page 5: ... 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 large surface area of the pictu...

Page 6: ...ture 2 In order to prolong the using life of the TV set please place it on a ventilated place 5 Don t open the back cover 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 anten...

Page 7: ... tube anode 2 Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device DVM FETVOM etc equipped with a suitable high voltage probe Do not test high voltage by drawing an arc 3 Discharge the picture tube anode only by a first connecting one end of an insulated clip lead to the degaussing or kine aquadag grounding system shield at the point where...

Page 8: ... an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounded tip soldering iron to solder or unsolder ES devices 4 Use only an anti static type folder removal device Some solder removal devices not classified as anti static can generate electrical charges s...

Page 9: ...dering iron tip and solder the strand against the component lead until the solder melts c Quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil and hold it there only until the solder flows onto and around both the component lead and the foil CAUTION Work quickly to avoid overheating the circuit board printed foil d Closely inspect the solder area a...

Page 10: ...ransistor 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 Insert new transistor in the circuit board Solder each transistor lead and clip off excess lead Replace heat sink Diode Removal Replacement Remove defective diode by clipping its l...

Page 11: ...he 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 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 At other connections Use the fol...

Page 12: ...6 Net Dimension Net Dimension Figure 2 ...

Page 13: ...7 Parts and Funcitions Front and side panel of the TV set When using S terminal please pull out video 1 input terminal Parts and Funcitions Figure 3 TV AV MENU VOLUME CHANNEL EARPHONE VIDEO AUDIO POWER ...

Page 14: ...8 Remote Controller Functions Figure 4 Remote Controller Functions 1 6 7 8 9 2 3 4 5 0 RECALL TV AV RATING MUTE P STD SLEEP DISPLAY MENU CH VOL VOL CH 1 2 3 4 5 6 7 8 9 10 11 12 ...

Page 15: ...nd reliability In addition this chip integrates the brightness and chroma retarding lines and additional functions of black level extension bus geometric figure adjustment I2 C bu control on the basis of the 7687 resulting in test point free assembly reduced components of test point and peripheric components and improved picture quality The CPU LC863424 uses SANYO LC863432B 535A series for reprogr...

Page 16: ... connected with the power supply the power indicator illuminates When the Power 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 3 Press of CH or CH button will result in moving the icon up or down for function options The desi...

Page 17: ...pressed again the search can be resumed 6 Add delete Press CH or CH button for option of ADD DELETE Press VOL or VOL button to add or delete some channel 7 Input Press CH or CH button for option of INPUT Press VOL or VOL button or press AV TV button on 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 o...

Page 18: ...o quit the main menu V CHIP setup This function is designed for television program limitation The TV set user is allowed to control the usage of the TV set in accordance with the regulations of US Federal Communications Commission This function is also destined to prevent children from watching the TV programs which are improper for juvenile 1 Press MENU button the menu will appear on the screen P...

Page 19: ... restrictive items are to be selected move the icon to the top left corner of the table and then press MENU button 1 If all restrictive items are to be released move the icon to the bottom left corner and press MENU button twice 2 If one of the restrictive items is to be selected press CH or CH button in an alternate way and press MENU button for some line and then VOL or VOL for option of desired...

Page 20: ...tus When TV RATING and MPAA RATING are selected the TV set will have the V CHIP function when V CHIP signals are received in the TV program Precausions 1 Keep the TV set away from heat resources such as stoves and radiators 2 Place the TV set in a well ventilated area 3 Place the TV set in an area free from dusts and corrosive gas 4 Prevent the TV set from waterdrops moisture and humidity 5 Do not...

Page 21: ...o see if 9v 5v is normal Check the control voltage of V552 or CPU power The failure of horizontal unit or N101 Normal Normal Normal Abnormal Checktosee103V etc voltageisnormal T esttoseeallterminal Resistanceofload Isnormal Checkswitch powerunit Check to see if rectifying tube is normal Change rectifying tube Check the Loader Abnormal Normal Abnormal Normal Abnormal Normal Abnormal Maintenance Ser...

Page 22: ...Normal Abnormal Normal Abnormal Abnormal Normal Normal Abnormal Abnormal Normal Check the voltage of all pins of XP902 is normal Heater Resistor open Check to see if b e voltage of V433 is existed Check the circuit from pin13 of N201 to H drive No raster Whether G2 voltage is normal Replace bad cmponents Check N201 Check N201 and H Vibration Check 12V power circuit Abnormal Normal Maintenance Serv...

Page 23: ...ae components There is trouble in V circuit There is trouble in V output circuit Yes No 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 Horizontal bright line Maintenance Service and Trouble Shooting Check Check the voltage at Pin2 of N401 ...

Page 24: ...f there is snapping sound Power amplifier is normal Check N101 and external SIF circuit Check muting circuit and V601 V602 Check to see if 19V exists Check SIF circuit and speaker Inspect 19V power supply Replace CRT Check ircuit between Pin19 of N201 and XS202 No Yes Change V902 or weld V902 again Check to see if voltages of XP902 are normal Lack of red Check to see if V902 is open or not well we...

Page 25: ...e Sound IF Amplifier 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 Figure 5 ...

Page 26: ......

Page 27: ...3 PCB Diagram Figure 8 PCB Diagram ...

Page 28: ...or decoding 2 LA78040 Vertical output integrated circuits 3 LA4525 Sound power amplifying integrated circuits A3 Electrical circuit analysis 1 Microprocessor and Small signal processing super monolithic integrated circuits LA76814A LA76814A is super large integrated circuit decoder containing intermediate image amplifying intermediate sound amplifying horizontal and vertical scan small signal proc...

Page 29: ...ort 5 1 31 Blank 14 OSD filter 3 55 32 Demagnetize 0 007 15 Video signal input 3 2 33 Blank 16 POWER ON OFF control signal output 0 03 34 Blank 17 Field pulse input 4 8 35 Blank 18 Line pulse input 4 3 36 Blank 2 N101 LA76814K PIN Leads Function Working Voltage V PIN Leads Function Working Voltage V 1 Video output 2 23 28 Reciprocal pulse input 1 06 2 FM filter output 2 23 29 Reference current 1 6...

Page 30: ...sawtooth wave output 2 47 50 FILL FILTER 2 24 24 Field incline gain 2 65 51 Outer sound input 2 12 25 Power 5 10 52 SIF output 1 95 26 AFC filter 2 49 53 SIF auto phase control filter 2 38 27 Line output 0 63 54 SIF input 3 14 2 Service mode and adjusting items and data 1 Method a Press PRO button to enter the adjustment or setup mode b Press CH or CH button to turn page up or down for desired ite...

Page 31: ... V LINE 0 31 10 V POSE 0 63 56 V SC 0 31 0 RF AGC 0 63 20 OSD H POSI 0 127 10 OSD V POSI 0 31 3 VOLUME OUT 0 127 100 SETUP STEREO OPTION 0 1 0 SUB CONT 0 31 20 SUB COLOR 0 63 25 SUB SHARP 0 31 10 SUB TINT 0 63 32 BLK STR DEF 0 On 1 Off 0 1 0 AFC GAIN 0 Low 1 Hi 0 1 1 V SEPUP 0 Low 1 Hi 0 1 1 CD MODE LA76814 0 1 LA76812 0 7 0 1 0 DIGITAL OSD 0 Simulation OSD input 1 Digit OSD input 0 1 0 OSD CONT 0...

Page 32: ...starts 1 memory 2 or 3 1 start 0 3 0 SEARCH CHECK 0 w out start auto search 1 w start auto search 0 1 0 SEARCH SPEED 0 search slow 1 search fast 0 1 1 AV OPTION 0 w out AV 1 1 way AV input 2 2 way AV input 3 3 way AV input 0 3 1 POSITION L R 0 top left corner 1 top right corner 0 1 1 BLACK BACK 0 No black back 1 Black back 0 1 1 BLACK TRANS 0 1 1 V MUTE P OFF 0 video output not cut before POWER OF...

Page 33: ...deaccentuation capacitor pin 9 is FM detector s DC filter connector and C117 is filter capacitor The external AUDIO signals are input via LA76814 pin 51 controlled by CPU A swith inside I2C bus control LA76814 can be used for options of internal and external signals The sound signals are transmitted via LA76814 pin 1 to LA4225A pin 1 via C601 coupling and transmitted from its pin 4 after being amp...

Page 34: ...rised of LA7840 and other components 6 CRT output circuit The tricolor signals produced by LA76814 will be transmitted to CRT board and then to the cathode of the TV tube after being amplified by videoamplifier which is comprised of V902 V912 and V922 7 CCD performance The CVBS signals produced by LA76814 pin 40 will be amplified and sent to N701 pin 19 via V821 and then processed by software and ...

Page 35: ...端 2 0 01 9 Plate control input 0 25 27 Av option control 1 0 01 10 AFT signal input 0 3 28 Control signal input 5 1 11 Blank 29 Right channel sound volume PWM output port 0 01 12 S terminal input test 5 1 30 Left channel sound volume PWM output port 0 01 13 CPU reset port 5 1 31 Blank 14 OSD filter 3 55 32 Demagnetize 0 007 15 Video signal input 3 2 33 Blank 16 POWER ON OFF control signal output 0...

Page 36: ...option 2 43 14 R input 3 92 41 Earth 0 15 G input 0 14 42 Outside video input 2 55 16 B input 0 15 43 Power 5 17 Beam limit 0 08 44 Inside video input 2 77 18 RGB power 7 94 45 Black strech delay filter 2 6 19 R output 2 21 46 Video output 2 12 20 G output 2 36 47 Auto phase control filter 3 5 21 B output 2 28 48 VCO COLL 4 3 22 Line synchronized output 0 49 VCO COLL 4 3 23 Field sawtooth wave out...

Page 37: ... 1 Switch on the power and receive NTSC system circular signal Warm up the TV set for 15 min 2 Enter the adjustment state Press the MUTE button then a bright horizontal line appears Adjust screen potentiometer to let the horizontal line just appears 3 Focus adjustment 1 Receive electronic circular signal 2 Set picture mode on standard mode 3 Adjust focus potentiometer until the optimum picture is ...

Page 38: ...CL21X 100V 223 J Type Voltage Value PF Toleance CL110X 25V 100μF 20 Type Voltage Value Toleance 104 10 104 223 22 103 Numbering system of Capacitor Eaxmple RY17S 2W 390 J 05 E A Type Wattage Value Ω Toleance RS11 1 2W 1 8K K Type Wattage Value Toleance ABBREVIATION OF PART NAME AND DESCRIPTION RESISTOR CAPACITOR PART NAME DESCRIPTION TYPE ALLOWANCE T Carbon F 1 S Solid J 5 J Metal K 10 Y Oxide M 2...

Page 39: ...A 2SB1569A E B A EXPORT 2SP2400A E B A EXPORT 2SC3853 2SC3852 E A 3DD2553 B A 3CA688 E A 2SC3853 2SC3852 B A 2SC1815 Y F 2SA1015 Y F 2SC752GTM Y F EXPORT 2SC2878 A TEM F EXPORT RN1204 DTC144ESATP EXPORT 2SA562TM Y F 2SC3355 F EXPORT Information of Resistors and Capacitors Figure 11 ...

Page 40: ...group Sincere Forever Tel 86 532 8938356 Web site http www haier com ...

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