Haier HTR20-A Service Manual Download Page 25

Page: 25 / 31

A3. Error Detection Process

Check to see if

Fuse is normal

No light and sound

Abnormal

Check VD603~VD606,

C607, N601etc.

Check to see if the

collector voltage of

VD622 is 24V

The failure ofhorizontal

unit orN201

Check to see if ,

N605 5v,

is normal

Check the control

voltage of V203 or

CPU power pin

Check N605 ,ect

Normal

Abnormal

Check to see 110V

、

180V

etc. voltage is normal

Test to see all terminal

Resistance of load

Check switch

power unit

Check to see if

rectifying tube

is normal

Check the

Loader

Change

rectifying diode

Abnormal

Normal

Abnormal

Normal

Abnormal

Normal

Abnormal

Summary of Contents for HTR20-A

Page 2: ...uct Products powered b electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product deal with in this service information by anyone else could result in serious injury or death CONTENT 1 SPECIFICATIONS 3 2 WAINING 4 3 FEATURES AND TECHINICAL DESCRIPTION 11 4 Adjustment 11 5 WIRING CONNECTION DIAGRAM 21 6 Circuit Explanation 21...

Page 3: ...3 V CHIP 11 Treble bass boost 34 No picture listening 12 Left right balancer 35 Background light 13 NICAM 36 Sleep timer 14 Multi audio modes 37 Q view 15 Tone adjuster 38 SOFTWARE CCD 16 MTS SAP 39 NO of built in speakers 2 17 AUDIO Auto volume leveling 40 Audio output power W 2 2 18 AV input back 1 front1 41 Total power input W 85 19 AV output back 1 42 Voltage range V AC120 20 DVD terminal back...

Page 4: ... damaged 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...

Page 5: ...isn t going to be used for long time or it is in thunder and lightening please pull out the plug from AC outlet and the antenna plug from the cover of the TVset 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 su...

Page 6: ...ontact with high voltage 4 Do not spray 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 comparable nonabrasive applicator 10 by volume Acetone and 90 by volume isopropyl alcohol 90 99 strength CAUTION This is a f...

Page 7: ...ective package until immediately before you are ready 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 ...

Page 8: ...e inserted and then bent flat against the circuit foil When holes are of slotted type the following technique should be used to remove and replace the IC When working with boards using the familiar round 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 ...

Page 9: ... shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 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 ...

Page 10: ...of the pattern break and locate the nearest component that is directly connected to the affected copper pattern 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 solder the connections CAUTION Be sure the insulated jumper wire is dressed so that it does not touch ...

Page 11: ...tory mode Press MENU to enter into next factory menu Press CH CH to select items and press VOL VOL key to make data adjustment of corresponding factory menus Press EXIT key to exit factory mode B Maintenance menu Table 8 You can change the DATA with mark when necessary MENU 00 Items Preset Description predicament HPOS 0E 60Hz Horizontal shift VPOS 03 60Hz Vertical shift 00 20 VSC 15 S emendation 1...

Page 12: ...306H 259H Bit 3 2V BLK BTM 10 304H 257H 11 302H 255H 00 23H 22H 01 27H 26H VBLK 04 Bit 1 0 V BLK TOP 10 29H 28H 11 31H 30H HITW EE Vertical offset 0 22mV Input DC 8 0mV YUV UB 07 Bit 3 2 1 0 YUV U BLK ADJ F 19mV 2 75mV dev 0 22mV Input DC 8 0mV YUV VB 07 Bit 3 2 1 0 YUV V BLK ADJ F 19mV 2 75mV dev MENU 03 Items Preset Description predicament RCUT 3B White point R GCUT 45 White point G BCUT 3A Whit...

Page 13: ...7 Recmmended 11 Q 9 Bit1 0 S Trap Group Delay Control for M 00 Off 01 60ns SSM 0B 10 90ns 11 120ns Bit 7 Nouse Bit 6 Y Peak Limiter 0 Y peak limiter off 1 Y peak limiter on 105IRE Bit 5 ACL STATR POINT 00 0V 01 0 2V 10 0 3V 11 1 0V ACL OFF Bit 3 ABL START POINT 00 0V 01 0 2V 10 0 30V 11 0 4V Bit 1 ABL GAIN 00 0 2V 01 0 35V ABCL 0E 10 0 5V 11 0 65V TV AV YUV COMP data Bit 7 C Trap Q 0 LOW 1 High Bi...

Page 14: ...ta 3 for PAL 11 the same as 10 Bit2 Set chroma APC 0 Disable 1 enable use Bit 3 4 data Bit 1 0 Internal ADC 00 GND 01 R output UCOM 00 10 B output 11 Monitor RF AGC via ADC Bit 7 6 AFC GAIN AFC Fix 0 TV 模式且弱信号判断到 Nois_Bit4 0 时 Data Description Blanking period Picture period 00 2 1 01 4 2 10 2 3 1 3 11 OFF OFF Bit 5 4 AFC GAIN Data Description Blanking period Picture period 00 2 1 01 4 2 10 2 3 1...

Page 15: ...yquist Buzz cancel on 1 off Bit 1 Nouse FLG0 24 Bit 0 Over mode 0 Normal 1 PIF over modulation switch on Bit 7 6 5 Nouse Bit 4 MainBoard SW 0 TV 00 AV2 01 1 TV 01 AV2 00 Bit 3 Horizontal side blanking 0 Off 1 On Bit 2 Nouse Bit 1 V ramp bias 0 Y C VCC V ramp bias 1 IC FLG1 1A Bit 0 CW SW 0 Off 1 On Bit7 6 Audio Monitor Out 00 depand on Audio sw 01 TV 10 Mute 11 Mute Bit5 4 C Trap MD 00 interlockin...

Page 16: ...4 SYBBN 48 Bit0 10 V_lock R1 7 Sync detection setting for BB Off Bit6 Sel LPF mode for sync det SY DET 3 recommend 1 Bit5 Sel SY DET 2 for sync dtection recommend 0 Bit4 Sel SY DET 1 for sync dtection recommend 0 Bit3 H lock detection mode 00 8dB weak signal 01 4dB Bit2 Window pulse for H lock detection 10 11 0dB Bit1 Sync detection place choice 00 H_lock_1 R0 3 01 H_lock_2 R1 4 SYBBF 48 Bit0 10 V...

Page 17: ...0_ALI1_for wideband expander AUALI2 00 TDA9850 A09 D4 0_ALI2_for spectral expander AUTIM 03 TDA9850 A0A D2 0_TC0 to TC2_timing current alignment data AUSTP 01 Audio mute step MENU08 V01 0D VOLUME OUTPUT DATA AT 1 V25 3D VOLUME OUTPUT DATA AT 25 V50 57 VOLUME OUTPUT DATA AT 50 V100 7F VOLUME OUTPUT DATA AT MAX BL25 1E of ATT for Balance 25 BL49 50 of ATT for Balance 49 ALC 00 ALC 0 OFF ALC 1 2 3 On...

Page 18: ...TS 00 SUB BRIGHT MENU11 BRTX 28 SUB BRIGHT MAX BRTN 1A SUB BRIGHT MINIMUM COLX 1B SUB COLOR MAX COLN 0D SUB COLOR MINIMUM COLC 36 SUB COLOR CENTER FOR NTSC COLD 03 SUB COLOR CENTER FOR DTV COLZ 03 SUB COLOR CENTER FOR DVD MENU12 TNTX 40 SUB TINT MAX TNTT 40 SUB TINT CENTER FOR NTSC TNTV 40 SUB TINT CENTER FOR AV TNTN 40 SUB TINT MINIMUM TNTD 42 SUB TINT CENTER FOR DTV TNTZ 40 SUB TINT CENTER FOR Y...

Page 19: ...ot used Bit 7 V mute_type 0 Y Mute 1 RGB Mute Bit 6 5 Nouse V MUTE 80 Bit 4 3 2 1 0 V mute time 00 8ms 25 200ms MENU15 DVD BLK T 18 DVD on latency time DVD OFF T 20 DVD off latency time ON DLY T 04 POWER on latency time Bit 5 7 Nouse Bit 4 VIDEO1 1 used 0 Nouse Bit 3 VIDEO2 1 used 0 Nouse Bit 2 S VIDEO 1 used 0 Nouse Bit 1 YUV COMP 1 used 0 Nouse AV SW 1B Bit 0 DVD 1 used 0 Nouse FAC MOD OFF EJTAG...

Page 20: ...ideo 1 DVD input from YUV Bit 7 Sync_det_bb sync mode 1 0 H Lock Sync Det 1 H Lock Sync Det Noise Det Bit 6 SPOT Kill when power off 0 Normal 1 BB SPOT KILL 1 when power off Bit 5 Selected Sync Mode 0 Input external C Sync 1 Read I2C BUS Data Bit 4 TB1231N V Freq 0 50Hz 1 60Hz Bit 3 Nouse Bit 2 V Mute ON Off when CH change 0 OFF 1 ON Bit 1 Nouse OPTM3 F7 Bit 0 B B_mute MUTE 1 Ok 0 No Bit 7 DLV err...

Page 21: ...e amplifying horizontal and vertical scan small signal processing color decoding I2 C bus control Information introducing functions and testing data for maintenance is listed in Table 1 Table 1 SYMBOL PIN Working Voltage V Ground Resistance Ω DVD_OPEN 1 0 8 36 4M SWA 2 0 04 12 8K KEY 3 4 94 19 4K GND 4 0 004 0 4Ω RESET 5 4 92 5 5K X TAL 6 2 17 33 3M X TAL 7 2 01 32 7M TEST 8 0 0 6Ω 5V 9 4 94 2 8K ...

Page 22: ... 3 3K H L OUT SIF OUT 31 4 89 11K EXT_AU_2 32 3 85 113K SIF IN 33 3 1 DC NF 34 2 22 10M PIF PLL 35 2 4 10M IF VCC 5V 36 4 88 0 72K S REG 37 2 2 IAU_MON_OUT 38 3 2 IF AGC 39 2 7 12 87M IF GND 40 0 004 0 7Ω IF IN 41 1 98 54 6K IF IN 42 1 98 54 3K RF AGC 43 0 49 BLACK DET 44 1 78 221K SVM OUT 45 2 92 APC FIL 46 2 23 38M YC 5V 47 4 85 0 71K SYNC OUT 48 4 55 7 31K D VCC3 3V 49 3 3 1 06K R OUT 50 2 02 8...

Page 23: ...e V Ground Resistance Ω INV1 1 Non inverting input 1 2 16 3 3M SGND 2 Signal ground 0 004 0 3Ω SVRR 3 Supply voltage ripple rejection output 6 19 22 9K Out 1 4 Output 1 76 16 1 3K PGND 5 Power ground 0 003 0 1Ω OUT2 6 Output 2 6 19 1 3K Vp 7 Supply voltage 12 9 M SS 8 Mute standby switch input 10 9 21 95K INV2 9 Non inverting input 2 2 162 4 Analysis of vertical sync and vertical scan output circu...

Page 24: ...ABL avoid high voltage over rated value that will cause X ray and affect your health 6 Analysis of video amplifying circuits The video amplifying circuits are comprised of V601 V611 V621 and peripheral components R G and B signals output from N201 50 51 and 52 3 video power transistor are available for amplifying the input R G B White balance adjustment is completed through N202 under control of a...

Page 25: ...ntal unit orN201 Check to see if N605 5v is normal Check the control voltage of V203 or CPU power pin Check N605 ect Normal Normal Normal Abnormal Checktosee110V 180V etc voltageisnormal T esttoseeallterminal Resistanceofload Checkswitch power unit Check to see if rectifying tube is normal Check the Loader Change rectifying diode Abnormal Normal Abnormal Normal Abnormal Normal Abnormal ...

Page 26: ...NO YES Abnormal Normal Normal Abnormal Abnormal Normal Check the voltage of all pins of XZ601 Heater Resistor open Check to see if be voltage of V431 is existed Check the circuit from pin15 ofN201 to V432 No raster Whether G2 voltage is normal Change wrong component or check peripheral circuit Check to see if 3 3V voltage is normal at PIN 49 of N201 Check G201 N201 and peripheral circuit of N201 C...

Page 27: ...f pin2 at N401 is normal Yes No Make R401 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 Snowy noise exist No sound and picture Not exist Exist Check to see if RAGC is at 00 mode Check to see if voltage output available at tuner Enter D MODE with customer remote controller Make RAGC tuned to ...

Page 28: ...ifier is abnormal Inspect N301 and peripheral components of N301 Inspect C301 C302 Check to see if 12 89V exists Inspect N201 and peripheral component of N201 Inspect 12 89V power Yes No Yes No Have noise No noise Inspect Inspect the circuit from No 50 of N201 to No 3 of XZ601 Yes No Change V901 or weld V901 again Check to see if voltages of XZ601 are normal Lack of red Check to see if V601 is ope...

Page 29: ...ection of the antenna is changed The antenna may be disconnected or falling out Check ifthe direction of the antenna is changed The batteries in the remote control may be exhausted The batteries may be improperly installed Check if there are obstacles between the remote control and the remote infrared ray receiver Check if there is strong light interference around the remote infrared receiver Chec...

Page 30: ...T 51 B OUT 52 GND 53 GND 54 5V 55 MUTE 56 SDA0 57 SCL0 58 ATV DTV BUS SW 59 POWER 60 DonauLV Wakeup 61 DonauLV Reset 62 RMT IN 63 DVD_POWER 64 N201 TMPA8873_HAIER_DTV C241 0 01u GND R203 10K GND R410 1W1 C430 1000u VD411 EU2A VD412 EU2A 13V 1 2 3 5 4 XS701 5P 2 54 E C B V214 2SA1015Y B C E V431 2SC2235 E C B V310 2SA1015Y V203 2SA1015Y V102 2SC1815Y R847 330 GND R206 100 1 2 R248 100 1 3 2 N605 TA...

Page 31: ...30 ...

Search results

Summary of Contents for HTR20-A

Reviews:

Related manuals for HTR20-A

Brands by name

Popular brands

Haier HTR20-A, Service Manual

Search results

Summary of Contents for HTR20-A

Reviews:

Related manuals for HTR20-A

Brands by name

Popular brands