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Содержание RGBTV-25F99

Страница 1: ...f operation instructions 5 Disassembly instructions 6 Specific information 7 Electrical adjustment 8 Information of Resistors and capacitors 9 Damageable parts list 10 System block diagram 2 3 8 10 11 13 30 32 34 35 Features 64cm pure flat picture tube Auto search 218 programs presetting and memory Child Lock On Screen Help Function 16 9 Mode Haier group ...

Страница 2: ...es Precautions for handling of picture tube Exploded of cabinet parts 6 Specific informations Principle integrated circuits Service mode and adjusting items and datas Error detection process 7 Electrical adjustment 8 Information of Resistors and capacitors Terminal view of transistors 9 Damageable parts list 10 System block diagram Circuits diagram 2 3 8 10 11 13 30 32 33 34 35 36 1 ...

Страница 3: ...a transformer of adequate power rating as this protects the technician from accidents that might result in personal injury caused by electrical shocks It will also protect the receiver and it s components from being 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 i...

Страница 4: ... the back cover otherwise it is possible to damage the components in the TV set and harm you 3 Don t place the TV set in the sunshine or near heat source 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 from AC outlet and the antenna plug from the cover of the TV set Explanation on the display tube Generally it is not needed to clea...

Страница 5: ...ts only by applying the following mixture to the contacts with a pipe cleaner cottontipped stick or comparable nonabrasive applicator 10 by volume Acetone and 90 by volume isopropyl alcohol 90 99 strength CAUTION This is a flammable mixture Unless specified otherwise in this service manual lubrication of contacts is not required 6 Do not defeat any plug socket B voltage interlocks with which recei...

Страница 6: ...60 parts tin 40 parts lead 3 Keep the soldering iron tip clean and well tinned 4 Thoroughly clean the surfaces to be soldered Use a mall wire bristle 0 5 inch or 1 25cm brush with a metal handle Do not use freonpropelled spayon cleaners 5 Use 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 solde...

Страница 7: ... of the new diode round the corresponding lead on the circuit board Securely crimp each connection and solder it Inspect on the circuit board copper side the solder joints of the two original leads If they are not 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...

Страница 8: ... the defective copper pattern with a sharp knife Remove at least 1 4 inch of copper to insure that a hazardous 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 20gauge jumper wire from the lead of the nearest component...

Страница 9: ...nology Zooming of pictures Location of controls Front and side panel of the TV set Rear panel of the TV set When using S video terminal please pull out video 1 input terminal Remote sensor window Side set terminals Power switch Menu control buttons MENU TV AV VOL CH Left sound track Right sound track Video terminal S VIDEO AUDIO VIDEO R L S video terminal Video 1 input terminals Antenna input AUDI...

Страница 10: ...TD TUN FUNC P P Program number Standby Display on the screen Sleep timer Former programme Help Mono stereo Volume up Calling menu Program down Zoom Setting channel menu Setting function menu Audio mode AV TV exchange Mute Program up Volume down Program scan Setting picture menu Picture mode Setting audio menu 9 ...

Страница 11: ...he system Press Program up down buttons to select FREQUENCY RANGE and PROGRAM NUMBER Press VOLUME buttons to set and Program up down buttons to select MANUAL CHANNEL SEARCHING Press VOLUME buttons to search manually When the search finishes all the programs will be stored automatically and the TV returns to normal status If the effect is not good press Program up down buttons to select FINE TUNE a...

Страница 12: ... cabinet from the front cabinet B Picture tube handling caution Due to high vacuum and large surface area of picture tube great care must be exercised when handling picture tube Always lift picture tube by grasping it firmly around faceplate NEVER LIFT TUBE BY ITS NECK The picture tube must not be scratched or subjected to excessive pressure as fracture of glass may result in an implosion of consi...

Страница 13: ...5F99 NO Name of part Part specialized code QTY 1 Front frame 0090200120 1 2 Left speaker 0094000018 1 3 Right speaker 0094000018 1 4 Color picture tube 0094000927 1 5 Bracket 0090802087 1 6 Rear cover 0090801480 1 7 Flank AV 0094300018 1 12 ...

Страница 14: ...Switch power supply switch transformer T801 BCK10002 power integrated circuits N801 KA3S0680RFBYDTU secondary power integrated circuits N804 KA7630 2 Main integrated circuits 1 WH2000 Microprocessor 2 TDA8844 Picture IF sound IF video processing line and field scan color decoding 3 TDA9859 Multifunction TV stereo sound processing integrated circuits 4 TDA8350Q Field output integrated circuits 5 TD...

Страница 15: ... 0 2 3M 15 Neutral point 0 9 2 3M 16 Myopia prevention PVD input not selected 5 9 9K 9 9K 17 Mute control output 0 33K 27K 18 Timer control output 0 2 30K 22 6K 19 Standby control output 0 30K 23K 20 Power signal output 4 9 5 6K 5 6K 21 Translucence background output not selected 0 33K 26 9K 22 Screen display B signal output 0 1 4M 2 4M 23 Screen display G signal output 0 1 5M 2 5M 24 Screen displ...

Страница 16: ...nt 0 3 8M 2 4M 36 Remote control signal input 5 62K 38M 37 Grounding 0 0 0 38 Production control 5 33K 27K 39 Brightness and color segregation control 0 24K 23 9K 40 AV1 AV2 and SVHS switching control input 0 24K 23 8K 41 I2 C serial bus clock line 3 9 31K 24K 42 I2 C serial bus datum line 4 0 31K 24K Table 2 Ground Resistance R Step Function Working Voltage V Positive Negative 1 Secondary sound I...

Страница 17: ...signal input 2 3 5 8M 4 2M 32 R Y signal input 2 3 5 8M 4 3M 33 Standard color sub carrier wave output not applied 4 3 6 1M 4 2M 34 3 58M crystal oscillator connection 2 5 6 2M 4 6M 35 4 43M crystal oscillator connection 2 5 6 2M 4 5M 36 Croma decoding filter connection 4 9 6 2M 4 5M 37 8V power supply 8 0 2 8K 2 8K 38 CVBS output 2 6 4 6M 4 6M 39 Power supply decoupler filtering 5 6 0M 380 5K 40 ...

Страница 18: ...e sound surface wave filter The AGC time constant is dependent on C243 lu connected to 53 of N201 TDA8844 2 and the AGC is controlled by I C busmastering and output through 54 of N201 TDA8844 to determine the high frequency tuner increase 4 Analysis of secondary sound intermediate wave filter and wave trap selection switch circuits Video combined television signals output from N201 6 of TDA8844 th...

Страница 19: ... functional TV sound acoustic effect processing including high and bass frequency division stereo and surround sound The audio signals from 55 of N201 are transmitted through V211 then divided into two groups after the decoupling capacitor C706 224 and added to 3 s from 55 of N201 are transmitted through V211 then divided into two groups after the decoupling capacitor C706 224 and added to 3 The l...

Страница 20: ...rack 4 0 8 9K 8 9K 19 High control capacitor connection 4 0 6 2M 4 3M 20 Neutral point 0 21 Bass control capacitor connection 4 0 4 6M 3 2M 22 Bass control capacitor connection 4 0 4 6M 3 2M 23 Left track audio frequency input 4 0 4 6M 3 2M 24 Left track audio frequency output 4 0 10 8K 10 8K 25 Grounding 0 0 0 26 AV frequency left track output 4 0 6 5M 4 3M 27 Imitation stereo capacitor connectio...

Страница 21: ... and testing data for TDA7297 maintenance is listed in Table 4 Test information is listed beneath VHFL if a cylindrical color card is installed then a FLUKE 79 III meter is used 7 Analysis of field sync and field scan output circuits The field sync signals segregated from compound sync signals are used to activate the field frequency segregation system which commences when a set amount of field sy...

Страница 22: ... beneath VHFL if a cylindrical color card is installed then a FLUKE 79 III meter is used 8 Analysis of line sync and line scan output circuits As the line oscillation circuit is installed inside N201 TDA8844 external line oscillation components are not necessary while the oscillation frequency is controlled by PH1 tester Some brightness signals including compound sync signals are transmitted to th...

Страница 23: ...diate amplifier N101 M9911A 7 outputs 6 3 Vrms filament voltage 1 provides sync signals to the microprocessor 5 output return pulse to obtain 180V direct current voltage after rectifying and wave filtering for power supply of video amplifying circuits 9 Analysis of video amplifying circuits The video amplifying circuits are comprised of integrated circuits N501 TDA6107 and peripheral components R ...

Страница 24: ...d C816 100u is 130V direct current voltage which is supplied to the output stage The pulse voltage output from 13 is rectified and filtered by VD807 D6L20U and C820 2200u and the resultant 15V direct current voltage is supplied to the sound power amplifying circuits The pulse voltage output from 11 is rectified and filtered via VD806 TR5GU41 and C818 2200u to obtain 12V direct current voltage to s...

Страница 25: ...uency correction 0 5 02 Not adjustable YDL Y delay compensation TV 0 8 04 Not adjustable Maintenance menu 2 GEOMETRY Table 8 Item Specifications Range Default Value Remark PSL NSL Field pitch correction 0 3FH PVS NVS Field center correction 0 3FH PVA NVA Field range correction 0 3FH PHS NHS Line center correction 0 3FH PEW NEW Line width correction 0 3FH PEP NEP Pincushion correction 0 3FH PEC NEC...

Страница 26: ... raise 0 1FH 07 DY B Dynamic B raise 0 1FH 07 SDTB Standard high 0 55H 32 SDBS Standard bass 0 41H 32 SDBT Standard brightness 0 64H 32 SDCT Standard contrast 0 5AH 5A SDCR Standard chroma 0 64H 32 SDSP Standard sharpness 0 64H 3C SDTT Standard tincture 0 64H 3C Maintenance menu 5 BOOST Table 11 Item Specifications Range Default Value Remark BT1 BLS BKS DS EBS 0 0FH 04 BT2 WPO DGR DSK DBL BON 0 1F...

Страница 27: ...1FH CLMCON Character display horizontal position 0 1FH OPTION3 1B Not adjustable Maintenance menu 7 NICAM Table 13 Item Specifications Range Default value Remark LEVEL ADJ Level adjustment 0 1EH 03 Not adjustable LOWER ERROR 0 FFH 14 Not adjustable UP ERROR 0 FFH 50 Not adjustable FILTER BAND Filter band width 0 03H 00 Not adjustable A2 LEVEL ADJ A2 level adjustment 0 0AH 08 26 ...

Страница 28: ...nsoect R933 and R505 Inspect V403 and T401 Ispect V402 Check to see if output available at 40 foot of N201 Check to see if CRT cathode voltage is normal Check to see if R G anf B signal output available at N201 Inspect TDA6107 and peripheral circuits 2 Horizontal bright lines Check to see if audio frequency signal output available at 46 and 47 foot of N201 Not Inspect R258 and C233 Inspect N201 Av...

Страница 29: ...k to see synchronistic line and signal input at 26 and 27 foot of N901 No synchronistic field signal Inspect synchronistic field signal input circuits R307 R915 R937 and V908 No synchronistic line signal Inspect synchronistic line signal input circuits C407 R407 C913 R934 R935 and V907 Inspect 28 and 29 foot at N901 Inspect 31 and 32 foot at N901 Check and if necessary replace N901 Check to see if...

Страница 30: ...02 L201 and C204 Inspect Z202 Z203 Z204 and Z205 Inspect N901 5 6 and 7 8 Not Available Inspect N201 56 Check and if necessary replace N201 Available Check to see if audio frequency signal input at N701 3 and 5 Check to see if audio frequency signal output at N701 15 and 18 Not Check and if necessary replace N701 Inspect N601 and peripheral circuits components Available 29 ...

Страница 31: ...he horizontal bright line just appears 3 Focus adjustment 1 Receive electronic circular signal 2 Set contrast control to max 3 Set brightness control to middle 4 Adjust focus potentiometer F1 and F2 until the optimum picture is achieved 4 AGC adjustment 1 Switch on the power and connect signals to the modulator Receive PAL system color bar signals strength 60dB 2 Connect the negative end of the di...

Страница 32: ...ometrical distortion in the eastwest direction is minimum Adjust PEC NEC until the geometrical distortion in the four corners is Minimum Adjust PET NET until the upper and bottom keystone distortion is minimum 8 Adjustment of character positions Adjust ROWCON and CLMCON for the vertical and horizontal positions of the screen menu 31 ...

Страница 33: ...Toleance CL21X 100V 223 J Type Voltage Value PF Toleance CL110X 25V 100 ÌF À 20 Type Voltage Value Toleance 104 10 Á104 223 22 Á103 Numbering system of Capacitor Eaxmple RY17S 2W 390 J 05 E A Type Wattage Value 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 À1 S Solid J À5 J Metal K ...

Страница 34: ...Terminal view of transistor SA614 YK E C B B CE KSC2331 YTA B CE KSR1010TA KSR2010TA BC548 CTA EBC CBE KSC815 YTA KSA539 YTA E C B 2SD18887YD 33 ...

Страница 35: ...00185 1 V403 TRANSISTOR 0094400184 1 N501 IC 0094400186 1 N801 IC 0094400189 1 C806 CAPACITOR 0094200132 1 L801 POWER FILTER 0094500031 1 R601 R602 FUSE RESISTOR 0094101529 2 R408 FUSE RESISTOR 0094100122 1 F801 FUSE 0094000012 1 F802 FUSE 0094000013 1 TU101 TUNER 0094000014 1 N901 IC 0094400781 1 PACKAGING 1 34 ...

Страница 36: ...2 7V AC SWITCH POWER SYSTEM V SYNC H SYNC HV PROTECTION T444 LINE OUTPUT TRANSFER H DRIVE VP VN V403 LINE OUTPUT N301 FIELD OUTPUT SIF TRAP SIF FILTER CVBS N201 SMALL SIGNAL PROCESSOR N501 VIDEO AMPLIFIER R G B BLACK CURENT STEAM IF Sf101 K9260M N701 SOUND PROCESSOR L OUT R OUT N601 SOUND AMPLIFIER X SYSTEM BLOCK DIAGRAM SPEAKER CRT AV IN AV OUT 35 ...

Страница 37: ... 4 7K L903 5 6uH HTRYG9208 LD901 A1 33V VT UHF VHF H VHF L B G PAL NT A3 12 7V MUTE POWER BCF A7 5 1V C905 104 C906 104 D K NTSC M PAL I R910 820 MENU SW901 R912 2 7K VOL UP SW903 R911 1 5K VOL DOWN SW902 CH DOWN SW904 R960 820 CH UP SW905 R961 1 5K TV AV SW906 TIM REM 5V SIG CN902 R943 47 C922 100u 3 1 2 R M 9 0 1 H S 0 0 3 8 A BUS SCL SDA B CN904 STOP R927 100 VD902 IN4148 R928 47 VD903 IN4148 R...

Страница 38: ... BC548C PAL NTSC IF 2 IF 1 A6 8V VD102 IN4148 1 2 4 5 3 6 7 8 10 CRT BUS IF BUS EXT BUS OSD BUS C V B S NTSC M PAL I D K B G VD204 IN4148 VD203 IN4148 VD202 IN4148 VD201 IN4148 R211 1K R210 4 7K C212 102 C205 101 C206 101 C207 101 C208 101 R208 1K 207 1K R206 1K R205 1K R263 1K Z202 4 5M Z203 6 0M Z204 6 5M Z205 5 5M R204 4 7K R203 4 7K V202 KSC815 Y R202 510 C204 101 L202 10uH L201 22uH V201 KSC8...

Страница 39: ...2V A2 130V H SYNC EW DRI VDN VDP VD403 IN4004 C422 104 C420 224 R414 10 VD405 R5GU41 R413 0 27 N401 KA7812 C418 471 C421 100u C426 100u 1 2 3 4 5 6 7 8 9 10 I N P U T 12 2 3V 2 3V 8 5V 17 3V 8 4 E A S T W E S T A M P L I F I E R 0 7V 47V 8 7V 13V INPUT INPUT FEEDBACK VP VERTICAL NC VFLYBACK OUTPUT 11 OUTPUT I N P U T 13 TDA8350Q N301 C301 474 C302 100u DZ303 MTZ16C DZ302 MTZJ30D DZ301 MTZ22A C304 ...

Страница 40: ...IN MUTE MUTE2 MUTE1 VCC1 OUT1 A 4 15V R601 0 18 R602 0 18 R607 6 2K R606 3 3K R605 1K R603 3 3K R604 6 2K C605 1u C601 1u C602 103 C606 103 C604 102 C607 1000u C603 2 2u VD601 IN4148 DZ604 MTZJ30D DZ603 MTZJ30D DZ602 MTZJ30D DZ601 MTZJ30D L601 F B L603 F B POWER MUTE V04 V03 180V HEATER CUT OFF B OUT G OUT R OUT AV1 AL AV1 AR AOR AOL V OUT V2 IN AV2 AL AV2 AR V1 IN C SVHS CN601 CN602 1 2 3 4 5 3 2...

Страница 41: ...Sincere Forever Haier Group Tel 86 532 8938356 Web side http www haier com ...

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