Haier HT-3718 Service Manual Download

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HT-3718

Serv ice Manual

COLOUR TELEVISION

Precautions.................................1

Specifications..............................

Alignment and Adjustments.........

Schematic Diagrams...................

Bolck Diagram.............................

Electrical Parts List.....................

Exploded Views and Parts List....

Troubleshooting...........................

Features

I C bus control
Turning TV on/off with curtain-fashion
218 programmes stored
Entire channel CATV(470MH

)

Multi-picture and multi-volume modes selection
Audio/Video input and output,S-Video terminal
Black background protection without signal
On-time,off-time,appointing programme
English OSD
Childlock

Haier group

Summary of Contents for HT-3718

Page 1: ...Exploded Views and Parts List 40 5 Troubleshooting 34 4 Features 2 I C bus control Turning TV on off with curtain fashion 218 programmes stored Entire channel CATV 470MHZ Multi picture and multi volume modes selection Audio Video input and output S Video terminal Black background protection without signal On time off time appointing programme English OSD Childlock Haier group ...

Page 2: ...amaged 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 a...

Page 3: ...be Do not test high voltage by drawing an arc 3 Discharge the picture tube anode only by a first connecting one terminal of an insulated clip lead to the degaussing or kine aquadag grounding system shield at the point where the picture tube socket ground lead is connected and then b touch the other terminal of the insulated clip lead to the picture tube anode button using an insulating handle to a...

Page 4: ...ent 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 sufficient to damage ES devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to...

Page 5: ...e the following unsoldering technique a Allow the soldering iron tip to reach normal temperature 500 o F to 600o F 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 6 Use the following unsoldering technique a Allow the ...

Page 6: ... AC 90v 250v 50 60Hz 2 COLOUT SYSTEM PAL SECAM NTSC4 43 3 58 AV 3 TV SYSTEM B G D K 4 CRT 14 5 AERIAL INPUT IMPEDANCE 75Ω Standard Coaxial Cable 6 SOUND OUTPUT POWER 1W 7 POWER CONSUMPTION 60W 8 NET WEIGHT kg 11 9 NET SIZE mm 440 x 355 x 335 ...

Page 7: ...cket 4 2 2 PIC window positioning VGA Pull curtain type on off display NO of Australian standard sockets Artificial intelligence Service terminal SVM HI FI audio signal output terminal CTI External super bass terminal LTI TERMINA LS DC current output Video signal digitalization Timer off MINS 120 Teletext Timer on Still frame Auto off upon no signal Multi PIC Frames AC off PIP independent tuner St...

Page 8: ...m 0 to 99 Picture mode stored don t Adjust Brightness repeatedly Audio Video input and output S video terminal Twelve kinds of modes Turning OFF the TV set with defined time 120 minutes 110 minutes 100 minutes 30 minutes 20 minutes 10 minutes Blue Background and Sound Mute without Signal Turn Off without signal after 15 minutes Entire Channel TV CATV 470 MHz English ...

Page 9: ...ontrol buttons HT 3718 HT3728 Power switch button Infrared sensor window Power indicator Program up down button Volume up down button TV AV alternating button Menu display button Audio R input Audio L input Video input ...

Page 10: ...ts of this TV set Tapes and discs can be played Connecting to the AV output sockets The AV output terminals can put out the picture and sound signal that the TV set played They are used to record TV program Connect the audio output L or the audio output on the TV set to the audio input on the mono VCR When you receive S Video video signal you must remove video signal Wen you receive video signal y...

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Page 19: ... Reference resistance KΩ Item No Function Reference voltage V Forward Reverse 1 Grounding terminal 0 0 0 2 Output terminal 13 0 45 1 9 3 Pump power output terminal 26 0 5 4 Vertical scanning saw tooth wave signal input terminal 0 95 0 9 0 25 5 Vertical scanning saw tooth wave signal generating terminal 0 75 0 68 1 75 6 Vertical power terminal 26 0 5 2 95 7 Vertical power input terminal 0 83 0 65 1...

Page 20: ...rominance low pass filter 4 34 7 5 11 14 Clock filter 2 39 7 8 11 15 Y input 2 77 7 8 11 16 Clock control 5 09 1 6 1 6 17 Sandcastle impulse input 0 69 6 6 7 5 18 Power supply 5 09 1 6 1 6 19 4 43 threshold input 1 49 7 5 9 6 20 Ground 0 0 0 21 System recognition switch 1 54 7 6 0 N201 TB1238AN Reference Voltage V Reference Resistance KΩ Pin Function Without signal With signal Forward Ω Backward Ω...

Page 21: ...0 1500 19 G signal output 1 8 1 8 760 1500 20 B signal output 3 0 3 0 720 1400 21 ABCL control pin 5 3 5 3 820 2000 22 Field sawtooth wave forming 4 2 4 2 750 2000 23 Field feedback signal 5 0 5 0 820 2000 24 Field driving signal output 0 9 0 9 720 900 25 Field AGC 0 2 0 2 800 2000 26 Bus clock signal 3 0 3 0 720 15000 27 Bus data signal 3 0 3 0 720 15000 28 Deflection circuit power supply 9 0 9 0...

Page 22: ... 800 2000 44 Black level detection filtering 3 0 2 0 800 4000 45 External chrominance signal input 2 8 2 8 800 2000 46 Y C circuit power supply 5 0 5 0 500 1200 47 PIF and SIF composite signal output 4 7 3 8 680 900 48 Intermediate frequency locked phase loop filtering 4 4 4 4 800 2000 49 VCO and SIF grounding 0 0 0 0 50 Intermediate frequency VCO 8 2 8 2 550 1000 51 Intermediate frequency VCO 8 2...

Page 23: ...nput 2 0 2 0 700 3000 14 Karaoke switch 0 0 600 10000 15 Keyboard matrix input 4 4 4 4 700 10000 16 Keyboard matrix input 4 4 4 4 680 10000 17 Vacant pin 1 0 0 700 10000 18 Vacant pin 1 0 0 700 10000 19 Vacant pin 0 0 620 10000 20 Vacant pin 0 0 620 10000 21 Grounding 0 0 0 0 22 Red primary color character output 0 0 620 2200 23 Green primary color character output 0 0 620 2200 24 Blue primary col...

Page 24: ...l 1 14 0 6 0 50 7 Output BL 0 1 5 1 5 8 Vacant pin 0 8 5 9 Power input terminal 2 9 0 5 0 5 3 Signal processing 1 Picture intermediate signal processing Having been under tuning and selective calling high frequency amplification and frequency mixing in tuner A101 the high frequency signals are output through the intermediate frequency signal output terminal IF of A101 to the base electrode of inte...

Page 25: ...ilter circuit The color signals are got out and sent to the chrominance unit The R Y B Y and G Y signals output from chrominance unit are sent to the matrix unit together with Y signal output from the video unit to generate R G and B primary color signals which are then output via Pin 18 19 and 20 into the final circuit CRT board to the picture tube circuit Tuning reverse code PWM signals are outp...

Page 26: ...focusing voltage and 6 3 Vrms filament voltage is generated via horizontal output transformer T402 by making use of the pulse high voltage generated on the collector electrode of the horizontal output tube V411 during the horizontal scanning return period Apart from this one part of the return pulse voltage output from Pin 5 of T402 is sent to Pin 26 of CPU after phase reverse to be used as synchr...

Page 27: ...t through V512 increases making the conducting time of V513 shorter output voltage lower thus achieving the purpose of regulation and vice versa With VD554 rectification C559 filtering and V552 control the pulse voltage supplied by the secondary pole of the switch transformer becomes 26V which is supplied to vertical scanning circuit With VD553 rectification C557 filtering 15V voltage is obtained ...

Page 28: ... voltage 112V and intermediate frequency detection 38 9 MHz 1 Connect the main baseboard to a 14 factory assembled color TV set and connect the company s adjusting signal 2 Switch on 220V AC main power supply and receive the electronic circular signal Adjust accelerating pole and focusing pole to appropriate position Press the picture memory mode button PP on the user s remote controller to get in...

Page 29: ...eive the color test card signal When you adjust the control of volume contrast brightness color saturation clarity the sound and picture shall change accordingly 4 For TV system test select the system control menu with the remote controller to have the following displayed on the menu screen Color AUTO Sound D K or B G 5 To test the AV input press TV AV button and the TV AV picture signals will be ...

Page 30: ...roperly adjusted Next adjust the frame center of the picture Press button to select the frame center VP50 to be adjusted Press button or until the frame center of the picture is in the center of the screen The frame center is properly adjusted Finally adjust the frame size of the picture Press button to select the frame size to be adjusted HIT Press button or until the frame size is full on the sc...

Page 31: ...er and the chrominance off Press the item selection buttons for green or blue bright balance Adjust the brightness and contrast control to make the screen darker and check the white balance of the low brightness If the dark balance is not proper adjust the dark balance adjusting button to achieve good white balance for low and high brightness The white balance adjustment finishes Finally switch of...

Page 32: ...rominance intermediate value SCNT 00 Subcontrast When the adjustment finishes do not forget to switch off the set with the remote controller to quit the S MODE maintenance state 3 Parameter record list for factory adjustment items HT 3718 Factory Adjustment D MODE Items Data Reference List Item Data Content Item Data Content RCUT 1A Red dark balance HITS 00 50 60Hz frame size GCUT 39 Green dark ba...

Page 33: ...T 15 Intermediate frequency VOC COLN 00 Min subchrominance value HAFC 00 AFC gain TNTX 28 Max tone value V25 25 Volume 25 TNTN 28 Min tone value V50 50 Volume 50 ST3 25 TV 3 58 resolution BRTS 00 Subbrightness SV3 25 AV 3 58 resolution VM2 24 System ST4 25 TV 4 43 resolution MOD0 41 Module data 0 SV4 25 AV 4 43 resolution MOD1 17 Module data 1 SHPX 35 Max resolution MOD2 DC Module data 2 SHPN 35 M...

Page 34: ...inspection tone intermediate value VP50 03 50Hz frame center SELF COL 20 Self inspection chrominance intermediate value HIT 0D 50Hz frame size Automatic recognition system HPS 03 50 60 Hz horizontal center OSD 07 Screen display width adjustment VP60 01 60Hz frame center OPT 06 Optional ...

Page 35: ...g resistors are normal Check 12V 9V 5V Check V552 or CPU POWER control circuit Check D902 V902 and V901 There is breakdown in horizontal circuit and N201 Check switch power circuit Check if rectifier diodes breakdown Replace the rectifier diodes Loading has breakdown Normal Abnormal Normal Abnormal Normal Abnormal Normal Abnormal Normal Abnormal Normal Abnormal 4 TROUBLESHOOTING ...

Page 36: ...ns at X602 The heater resister is broken Check the connector electrode voltage of V411 There is breakdown in horizontal drive grade Check V444 T401 R437 V411 is rosin joint or broken Check if FBT T402 V411or C415 C416 are leakage of electricity Check if pin 28 voltage 9V at N201 is normal Rechange bad components or remedy content circuit Check the horizontal oscillation external circuit of Z280 N2...

Page 37: ...tant Check if R907 R448 are rosin joint and the resistor value of R448 changes larger Check the external circuit of N201 and N201 Normal There is breakdown in the vertical output grate Check if the connector of the deflection yoke is connected well and C433is rosin joint or cutoff and the external circuit of N402 and N402 Check 26V power circuit YES NO YES NO YES NO 3 ...

Page 38: ...normal check N201 sound IF circuit and N201 Break the connector electrode of V701 let the black meter rod tap pin 6 at N701 see if the speakers have snapping There is breakdown in sound mute circuit check V701 V903 Check if there is 16 5V voltage Check sound power amplifier N701 and circuit speaker Check 16 5V power circuit 4 Yes No Yes No Yes No ...

Page 39: ...enter S MODE and adjust RAGC to near 2D Check picture IF channel and V231 V212 N201 Aerial system or tuner breaks down Check the circuit between CPU and tuner NO YES YES NO YES NO NO red Check if V622 is rosin joint or break Replace V622 or joint Check the voltage of pin 1 at XS602 Check V621 R621 Check the circuit between pin 18 at N201 and pin 3 at XS261 YES NO YES NO 5 6 ...

Page 40: ...There is black words Check L902 C926 C925 Check the circuit between pin 22 pin 24 at D901 and pin 14 pin 16 at N201 Replace the compartment Normal Abnormal Check the circuit between V922 R915 C450 and pin 5 at FBT ...

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Page 42: ... 0094101496 R002 RT13 1 6W 22K 5 07 A A 1 Resister 0094101496 R004 RT13 1 6W 22K 5 07 A A 1 Resister 0094101497 R001 RT13 1 6W 68K 5 07 A A 1 Resister 0094101497 R003 RT13 1 6W 68K 5 07 A A 1 Resister 0094101300 R005 RT14 1 4W 680 5 10 A A 1 Infrared sensor 0094000216 A001 HS0038 1 LED holder 0090200308 MTAC0078AC Q 1 Diode 0094400282 VD003 BT205 L 1 Rubber washer 0090300203 5 5 3 5 1 Push switch ...

Page 43: ...R203 RT13 1 6W 100 5 T 1 Resister 0094100017 R207 RT13 1 6W 100 5 T 1 Resister 0094100017 R216 RT13 1 6W 100 5 T 1 Resister 0094100017 R217 RT13 1 6W 100 5 T 1 Resister 0094100017 R219 RT13 1 6W 100 5 T 1 Resister 0094100017 R221 RT13 1 6W 100 5 T 1 Resister 0094100017 R232 RT13 1 6W 100 5 T 1 Resister 0094100017 R236 RT13 1 6W 100 5 T 1 Resister 0094100017 R702 RT13 1 6W 100 5 T 1 Resister 009410...

Page 44: ... Resister 0094100028 R559 RT13 1 6W 3 3K 5 T 1 Resister 0094100028 R925 RT13 1 6W 3 3K 5 T 1 Resister 0094100029 R108 RT13 1 6W 4 7K 5 T 1 Resister 0094100029 R202 RT13 1 6W 4 7K 5 T 1 Resister 0094100029 R922 RT13 1 6W 4 7K 5 T 1 Resister 0094100029 R938 RT13 1 6W 4 7K 5 T 1 Resister 0094100029 R989 RT13 1 6W 4 7K 5 T 1 Resister 0094100721 R213 RT13 1 6W 5 6K 5 T 1 Resister 0094100721 R263 RT13 1...

Page 45: ...5 T 1 Resister 0094100800 R970 RT13 1 6W 47K 5 T 1 Resister 0094100800 R981 RT13 1 6W 47K 5 T 1 Resister 0094100800 R256 RT13 1 6W 47K 5 T 1 Resister 0094100038 R446 RT13 1 6W 56K 5 T 1 Resister 0094100038 R448 RT13 1 6W 56K 5 T 1 Resister 0094100038 R915 RT13 1 6W 56K 5 T 1 Resister 0094100929 R923 RT13 1 6W 18K 5 T 1 Resister 0094100039 R105 RT13 1 6W 68K 5 T 1 Resister 0094101024 R443 RT13 1 6W...

Page 46: ...F K F 1 Capacitor 0094201038 C551 CT1 06 2B4 63V 1800PF K F 1 Capacitor 0094201040 C112 CT1 08 2F4 63V 0 01 F Z F 1 Capacitor 0094201040 C113 CT1 08 2F4 63V 0 01 F Z F 1 Capacitor 0094201040 C114 CT1 08 2F4 63V 0 01 F Z F 1 Capacitor 0094201040 C202 CT1 08 2F4 63V 0 01 F Z F 1 Capacitor 0094201040 C217 CT1 08 2F4 63V 0 01 F Z F 1 Capacitor 0094201040 C221 CT1 08 2F4 63V 0 01 F Z F 1 Capacitor 0094...

Page 47: ...094200581 C704 CD110X 25V 100 F M F 1 Capacitor 0094200990 C430 CD110 35V 47 F M F 1 Capacitor 0094201243 C705 CD110X 35V 100 F M F 1 Capacitor 0094201243 C449 CD110X 35V 100 F M F 1 Capacitor 0094200042 C212 CD110 50V 0 22 F M F 1 Capacitor 0094200016 C271 CD110 50V 0 47 F M F 1 Capacitor 0094200043 C256 CD110 50V 1 F M F 1 Capacitor 0094200043 C265 CD110 50V 1 F M F 1 Capacitor 0094200043 C291 C...

Page 48: ...328 VD517 ES1 T 1 Diode 0094400328 VD552 ES1 T 1 Diode 0094400329 VD553 EU2Z T 1 Diode 0094400329 VD557 EU2Z T 1 Diode 0094400329 VD412 EU2Z T 1 Diode 0094400388 VD433 EM01Z T 1 Diode 0094400388 VD434 EM01Z T 1 Diode 0094400331 VD555 EU1C T 1 Diode 0094400329 VD554 EU2Z T 1 Diode 0094401113 VD556 RU3A T 1 Diode 0094400358 VD551 RD6 2EB3 T 1 Diode 0094400359 VD261 RD5 1EB2 T 1 Diode 0094400359 VD43...

Page 49: ...267 0 6mm 7 5mm B 1 Jumper 0094101103 W422 0 6mm 7 5mm B 1 Jumper 0094101103 W432 0 6mm 7 5mm B 1 Jumper 0094101103 W433 0 6mm 7 5mm B 1 Jumper 0094101103 W435 0 6mm 7 5mm B 1 Jumper 0094101103 W436 0 6mm 7 5mm B 1 Jumper 0094101103 W437 0 6mm 7 5mm B 1 Jumper 0094101103 W438 0 6mm 7 5mm B 1 Jumper 0094101103 W463 0 6mm 7 5mm B 1 Jumper 0094101103 W502 0 6mm 7 5mm B 1 Jumper 0094101103 W553 0 6mm ...

Page 50: ...04 0 6mm 10mm B 1 Jumper 0094101104 W556 0 6mm 10mm B 1 Jumper 0094101104 W560 0 6mm 10mm B 1 Jumper 0094101104 W904 0 6mm 10mm B 1 Jumper 0094101104 W908 0 6mm 10mm B 1 Jumper 0094101104 W910 0 6mm 10mm B 1 Jumper 0094101104 W915 0 6mm 10mm B 1 Jumper 0094101104 W922 0 6mm 10mm B 1 Jumper 0094101104 W927 0 6mm 10mm B 1 Jumper 0094101104 W928 0 6mm 10mm B 1 Jumper 0094101104 W951 0 6mm 10mm B 1 Ju...

Page 51: ...006 R550 RF10 1W 1 5 15 C A 1 Resister 0094101006 R558 RF10 1W 1 5 15 C A 1 Resister 0094101290 R910 RF10 1W 1 5 17 C A 1 Resister 0094101010 R445 RY16 1W 1 8 5 15 C A 1 Resister 0094100714 R411 RY16 1W 100 5 15 C A 1 Resister 0094101291 R413 RY16 1W 1K 5 12 C A 1 Resister 0094100719 R437 RY17 2W 270 5 20 C A 1 Resister 0094100719 R939 RY17 2W 270 5 20 C A 1 Resister 0094101011 R553 RY17 2W 12K 5 ...

Page 52: ...66 C231 CD110 50V 0 47 F M 05 F A 1 Capacitor 0094201377 C421 CD71 50V 4 7 F M 05 F A 1 Capacitor 0094201251 C101 CD110 50V 4 7 F M 05 F A 1 Capacitor 0094201592 C563 CD288 160V 330 F M 10 G A 1 Capacitor 0094202156 C562 CD287 250V 22 F M 05 E A 1 Capacitor 0094201723 C507 CD293 450V 150 F M 10 G A 1 Capacitor 0094201379 C703 CL11 50V 4700PF J 05 C A 1 Capacitor 0094201380 C414 CL21X 50V 0 47 F K ...

Page 53: ... housing 0094300027 XZ901 TJC9 3A 1 Connect housing 0094300027 ZX700 TJC9 3A 1 Connect housing 0094300047 XS261 TJC9 5A 1 Filter 0094500384 L504 LCL 05 1 Transformer 0094500735 T402 BSC25 0228 1 Transformer 0094500396 T501 BCK 08A9 1 Transformer 0094500426 T401 BCT 02 1 Fuser holder 0090100037 F501a MTBJ0001BB Q 1 Fuser holder 0090100037 F501b MTBJ0001BB Q 1 Connect housing 0094300096 XS212 AV6 8 ...

Page 54: ...01103 W705 0 6mm 7 5mm B 1 Transistor 0094400451 V701 2SC2482 E A 1 Transistor 0094400451 V702 2SC2482 E A 1 Transistor 0094400451 V703 2SC2482 E A 1 Capacitor 0094201096 C721 CC1 08 CH 63V 100PF J 05 C A 1 Capacitor 0094201221 C741 CT81 10 2B4 2KV 1000pF K 07 C A 1 Capacitor 0094201223 C743 CD110 250V 2 2 F M 05 F A 1 Resister 0094101011 R707 RY17 2W 12K 5 20 C A 1 Resister 0094101011 R717 RY17 2...

Page 55: ...5 LA4275 1 Screw 0090600067 GB9074 4 88 M3 10 1 Nut 0090600066 GB6170 86 M3 1 heatsink assembly 0090800219 BJB0067 Q 1 Heatsink 0090100115 MTBT2001BC Q 1 IC 0094400357 L7812CV 1 Screw 0090600012 SJ2824 87 ST3 8F 1 ...

Page 56: ...s high pass filter H OUT 6dB Video unit Color subcarry trap circuit EXT Y IN 6dB EXT C IN EXT Ａ IN unit 7 Block Diagram 1 Signal shooting block 2 TB1238AN Tuner IF video color RGB H V oscillation scan signal prossing SAW Sound power amf H output V output CRT CPU Infrared sensor Remote co EPROM AV input output Secam TA1275Z ...

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Page 58: ...Sincere Forever Haier Group Tel 86 532 8938356 Web side http www haier com ...

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