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akira 21SHS3 Series Service Manual

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Summary of Contents for akira 21SHS3 Series

  • Page 2 Group Model: 21SHS3 Model No: 21SHS3-CE.doc Version 1.0...

  • Page 3: Table Of Contents

    CONTENT SAFETY NOTICE ........................... 4 GENERAL DESCRIPTION ........................6 TECHNICAL SPECIFICATION ......................7 GENERAL SPECIFICATION ......................... 8 HORIZONTAL AND VERTICAL CIRCUIT ..................9 CHASSIS BLOCK DIAGRAM ......................10 FAULT FINDING TREES........................11 IC BLOCK DIAGRAM ......................... 18 FACTORY MENU ..........................40 EXPLODED VIEW AND PART NAME ....................

  • Page 4: Safety Notice

    Do not hold the CRT neck in case of causing damage to the CRT. 2. When the power cord needs replacing, use the same one as that provided by AKIRA factory. 3. Voltage exists between the hot and cold ground when TV is in operation. Install a separation transformer during repairing or connecting to any tester for the sake of safety.
  • Page 5 5. When replacing old wire, wind new one round the shaft to weld. When replacing components with safety in performance, use the same type as that specified by AKIRA and install it in the former way. 6. Never place wire near high-temperature or high-voltage components.

  • Page 6: General Description

    GENERAL DESCRIPTION THE SURVEY Table 1, the main IC and functions Number Function Remark Power supply KA5Q0765RT N611 CPU + SIGNAL PROCESSER OM 8370 /TDA9370 N301 Field driver STV9302A N401 Sound driver AN7522N N161 N801 (Video) AV SWITCH TC4052BP N161 (sound) Memory AT24C08 N702...

  • Page 7: Technical Specification

    TECHNICAL SPECIFICATION Test Item Conditional TD171 RF&AV signal input with sound loud speaker AC Operating (volume maximum) & Picture set in Dynamic 140Vac ~ 240Vac Range mode Philips or Mono-scope pattern signal with howling sound Contrast & Brightness set in Maximum, 90Watts Total Power sound increase maximum...

  • Page 8: General Specification

    GENERAL SPECIFICATION 14” Power consumption 21” Receive system DK/BG/I Color system PAL/ SECAM/ NTSC Vision intermediate frequency 38.9MHz 5.5 MHz(B/G) Inter-carrier frequency 6.5MHz(D/K) Chroma if frequency PAL 34.47/ 35.32MHz Antenna type DIN TYPE 75 Ohm VHF Low channel (VL) =48.25 147.25 VHF high channel (VH) =154.25...

  • Page 9: Horizontal And Vertical Circuit

    HORIZONTAL AND VERTICAL CIRCUIT Through Synchronous separating circuit, the video signal is divided into horizontal-Synchronizing signal and Vertical-Synchronizing signal. The horizontal-Sync pulse coming from pin 33 is transferred to the horizontal-drive transistor. The cathode driving voltage 180V vertical drive voltage +15V and –15V are all generated from FBT.

  • Page 10: Chassis Block Diagram

    CHASSIS BLOCK DIAGRAM V-in2 A-in2 （ ） L A-in2 （ R ） SIF TRAPS SP161 Video-out V352 Z351,Z352,Z354 8Ω5W Audio-out （ ） AUDIO AMPLIFIER Audio-out （ ） (N101) AN7522N Video-in1 SP162 Audio-in1 （ ） V351 8Ω5W AV SWITH Audio-in1 （ ） N801（...

  • Page 11: Fault Finding Trees

    FAULT FINDING TREES A Three-None(no raster, no picture, no sound) This failure is mainly caused by big-power circuit such as power supply, horizontal scanning, vertical scanning. The detail checking and repairing steps are as follow. ＞ 130V Test the voltage of C528B 115V ＜...
  • Page 12 B Two-None (no picture, no sound) The failure shows that the set does not display the picture but it has noise wave or blue background or OSD on the screen. This means that the circuits of power supply, horizontal scanning, vertical scanning and video amplification are normal and they are not considered in the repairing.
  • Page 13 ＜ 2V Exam the voltage of “ AGC ” on A101 without antenna ＞ 3.8V Check R317, R318, R316,C307,A101,N301 Test the voltage on pin 14, 54, 56of N301 Check,L331, C333, L752,C753A, L751, C751 Check N503, N301,C532, R565,C524, Test the voltage on pin 51, 52, 53, 50 of N301 ,VD561,V542 Observe if there is snow-noise-wave disturbance on the CRT via using “Signal-input way ”...
  • Page 14 5. No sound In this kind of failure, first of all we should observe if there is the picture on the CRT. It proves the small signal circuit to work correctly with the picture on the CRT and we only check the sound signal processing and sound amplification circuit.
  • Page 15 C Only horizontal line in the middle of the screen: If vertical deflection circuit does not work, this kind of failure will happen. In deflection yoke, there only has horizontal sweeping , the electron beam in the CRT only moves in the horizontal orientation , so form this failure.
  • Page 16 D Only vertical line in the middle of the screen This is a dangerous failure. It probable causes flashover and smoking inside the set. Don’ t let your TV work for a long time as this failure appears. Because the electron beam can not move in the horizontal orientation, the failure should be in the horizontal deflection circuit.
  • Page 17 The detail checking and repairing steps are as follow: N301 does not work 3.3V ＜ 3.3V The voltage on the pin 56 of N301 Check the voltage on the positive pole of C548 Observe if there is sine wave on the pin 58 or pin 59 of N301 with an oscilloscope =3.3V Check alternant voltage on secondary coil of N505,...

  • Page 18: Ic Block Diagram

    IC BLOCK DIAGRAM Fig 1: OM8370 Illustration Model No: 21SHS3-CE.doc Version 1.0...
  • Page 19 MAIN CHIP INSTRUCTION Pin 1 Standby control, “1” is on, “0” is off. Pin 2 Pin 3 Pin 4 Tuning PWM output Pin 5 Auto AV control SW, connected with the SCART 8 pin. Input. The rising edge or the falling edge operates. Pin 6 Key board input.
  • Page 20 Pin 36 EHT tracking /over voltage protection. If something is wrong, the anode high voltage rise the heater voltage will rise too. When the rising voltage arrive some limit, the V406 works, the voltage of pin 36 will exceed 3.9V. The OM8370 will stop working.
  • Page 21 Fig 2: HEF4052BP Illustration Model No: 21SHS3-CE.doc Version 1.0...
  • Page 22 FUNCTION TABLE OF N4052 Input Channel On Ē – Z – Z – Z – Z – Z – Z – Z – Z NONE Notes: H = HIGH state (the more positive voltage) L = LOW state (the less positive voltage) X = state is immaterial Model No: 21SHS3-CE.doc Version 1.0...
  • Page 23 IC N402 <VERTICAL OUTPUT> LA78040 (or STV9302) Model No: 21SHS3-CE.doc Version 1.0...
  • Page 24 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 25 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 26 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 27 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 28 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 29 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 30 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 31 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 32 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 33 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 34 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 35 Inverting input Pump up out VER output Output stage Vcc Non inv. Put Model No: 21SHS3-CE.doc Version 1.0...
  • Page 36 Fig 4 AN7522N Illustration Model No: 21SHS3-CE.doc Version 1.0...
  • Page 37 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 38 Model No: 21SHS3-CE.doc Version 1.0...
  • Page 39 Fig 5: KA5Q0765RT Illustration Model No: 21SHS3-CE.doc Version 1.0...

  • Page 40: Factory Menu

    FACTORY MENU Main power +B setting Receive standard color pattern RF signal. Set picture to “Standard Mode”. Adjust VR501, to get +B (VD542 -) voltage =110V. C bus control adjustment method How to enter and exit factory mode (with customer’s remote controller) 1.
  • Page 41 Menu 4 Preset value Item Definition 50Hz 60Hz OSD V OSD vertical position OSD H OSD horizontal position Menu 5 Item Preset value Definition MODE STANDARD Picture mode selection. You can select four modes: STANDARD, VIVID, MILD and USER. BRIGHT Preset bright value for the mode you have selected above.
  • Page 42 Menu 7 Item Preset value Definition IFFS 38.9MHz IF Frequency selection DK system selection I system selection BG system selection M system selection SIF PRI SIF Priority AV2 selection S-VIDEO S-video selection YUV selection VOL ADJ POINT VOL curve point selection VOL ADJ VALUE VOL curve value adjusting on the selected point Menu 8...

  • Page 43: Exploded View And Part Name

    EXPLODED VIEW AND PART NAME Model No: 21SHS3-CE.doc Version 1.0...

  • Page 44: Bom List

    BOM LIST Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code CARBON RES RT13-1/6W-10Ω-J D10B100J-T RDB100J-NAAT R312、871 CARBON RES RT13-1/6W-22Ω-J D10B220J-T RDB220J-NAAT R914、924、934 CARBON RES RT13-1/6W-33Ω-J D10B330J-T RDB330J-NAAT R398、806 CARBON RES RT13-1/6W-47Ω-J D10B470J-T RDB470J-NAAT R368、708、911、921、931 CARBON RES RT13-1/6W-56Ω-J D10B560J-T...
  • Page 45 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code CARBON RES RT13-1/6W-470Ω-J D10B471J-T RDB471J-NAAT R308、1517 CARBON RES RT13-1/6W-680Ω-J D10B681J-T RDB681J-NAAT R316、482 R128、129、369、460、464 CARBON RES RT13-1/6W-1KΩ-J D10B102J-T RDB102J-NAAT R481、701、734、802、803 R816、818、825、827、 CARBON RES RT13-1/6W-1.2KΩ-J D10B122J-T RDB122J-NAAT R305、560 CARBON RES RT13-1/6W-1.5KΩ-J D10B152J-T...
  • Page 46 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code R126、127、163、380、395 R396、434、461、548、551 CARBON RES RT13-1/6W-10KΩ-J D10B103J-T RDB103J-NAAT R704、705、706、707、709 R816A、818A、825A、827A R851A、852A、912、922、932 CARBON RES RT13-1/6W-15KΩ-J D10B153J-T RDB153J-NAAT R331 R162、384、804 CARBON RES RT13-1/6W-22KΩ-J D10B223J-T RDB223J-NAAT R1515、1556、 CARBON RES RT13-1/6W-27KΩ-J D10B223J-T RDB273J-NAAT R484、487...
  • Page 47 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code CARBON RES RT14-1/4W-2.7Ω-J D10C2R7J-T RDC2R7J-NABTD R468 CARBON RES RT14-1/4W-22Ω-J D10C220J-T RDC220J-NABTD R513 CARBON RES RT14-1/4W-27Ω-J D10C270J-T RDC270J-NABTD R561 CARBON RES RT14-1/4W-2.2KΩ-J D10C222J-T RDC222J-NABT R161、1526、 CARBON RES RT14-1/4W-10KΩ-J D10C103J-T RDC103J-NABT...
  • Page 48 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code FUSE RES RF10-2W-3.9Ω-J R480 OXIDE FILM RES RY16-1W-1.5Ω-J S10E1R5J-C RSE1R5J5DCCN R406 OXIDE FILM RES RY16-1W-22Ω-J S10E220J-C RSE220J5ACCN R300A OXIDE FILM RES RY16-1W-1KΩ-J S10E102J-C RSE102J4ACCN R466 OXIDE FILM RES RY17-2W-5.6Ω-J S10F5R6J-C RSF5R6J5ACDN...
  • Page 49 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code VARIABLE RES WI06-2AA-2KΩ V11D202B VDAAA202A001C VR501 CERAMIC CAPA. CC1-06A-CH-63V-33pF-J C2CF330J-T CCF330JICA-F C761、762 CERAMIC CAPA. CT1-06A-2B4-63V-330pF-K C2BF331K-T C911、921、931 C803、805、812、814 CERAMIC CAPA. CT1-06A-2B4-63V-470pF-K C2BF471K-T C824、826 C732 、 CERAMIC CAPA. CT1-06A-2B4-63V-560pF-K C2BF561K-T C381...
  • Page 50 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code CERAMIC CAPA. CT81-08C-2R-1KV-470pF-K C2RW471K-O CKW471K2RA-N C529 CERAMIC CAPA. CT81-08C-2R-1KV-1000pF-K C2BW102K-O CKW102K2BJ-N C503、504、505、506 CERAMIC CAPA. CT81-08C-2R-2KV-220pF-K C2RX221K-O CKX221K2RA-N C527 CERAMIC CAPA. CT81-08C-2R-2KV-470pF-K C2RX471K-O CKX471K2RA-N C456、543 CERAMIC CAPA. CT81-08C-2R-2KV-680pF-K C2RX681K-O CKX681K2RA-N...
  • Page 51 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code Electrolytic Capa. CD110-25V-1000uF -M E20D102M CED102M1ACHN C522 Electrolytic Capa. CD110-25V-2200uF -M E20D222M CED222M1ACKN C524 Electrolytic Capa. CD110-35V-47uF -M E20E470M-T CEE470MYACCN C453 Electrolytic Capa. CD110-35V-330uF -M E20E331M CEE331M1ACFN C530 Electrolytic Capa.
  • Page 52 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code FILM CAPA CL21X-50V-0.47u-K F22F474K-T CAY474K1-H-F C461 FILM CAPA CL11-100V-3300pF-K F20G332K-T CFG332K1-H-N C321 FILM CAPA CL11-100V-5600PF-J F20G562J-T CFG562J1-H-N C154、158 FILM CAPA CL11-100V-0.012uF-J F20G123J-T CFG123J1-H-NW C1515 FILM CAPA CL11-100V-0.022uF-J F20G223J-T CFG223J1-H-NW...
  • Page 53 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code VD171、301、461、462、482 DIODE 1S1555/IN4148 DR0001XX-T DRIN4148---T VD561、734、911、921、931 VD1514、1516、1518 DIODE BAV21 DRBAV21----BP VD912、922、932 RECTIFIER DIODE FR105/RGP10D DR0003XX-T DRRGP10D---T VD401、470、471、525、1517 DIODE TVR4N DR0015XX-T DRTTVR4N---NZ VD503、504、505、506 VD436、472 RECTIFIER DIODE RGP10J DR0017XX DRRGP10J---T VD524...
  • Page 54 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code TC4052BP/CD4052BE/HEF4052BP IXXX0026 NHEF4052---BP N121、801 LA78040/STV9302 IXXX0142 NLA78040---N N401 EEPROM IC AT24C08( 8K)/TL24C08 IXXX0079 NAT24C08---N N702 Voltage-stabilizer uPC574J/CW574CS/KA33V IXXX0080-T NCW574CS----N N703 TA7808/L7808/MC7808CT IXXX0090 NMC7808CT--N N503 TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y RXA1015X-T Q2PA1015-GNF V1511、171...
  • Page 55 TRAP FILTER TRAP FILTER T 6.0M (X6.0B) FC0007XX XTC007-----N Z352 TRAP FILTER T 5.5M (X5.5B) FC0008XX XTC008-----N Z354 SAW FITER 38.9MHz FS0043XX XFS043-----NB Z301 2966 FUSE 3.15A 250V FXXX0020 FBA3154S02C F501 KDC-A11 K501 POWER SW BXATB066---- TUNER 5V 38.9M 470M A101 Crystal Oscillator 12.0MHz（18P）...
  • Page 56 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code Connector TJC3-5P-5P-450mm(3脚和4脚对调) XS301---XS903 CRT SOCKETⅡ GZS8-6-5 NXXX0020 XS901 A/V SOCKET AV9-8.4-04 GBBB9-03----- XS801 S-VIDEO SW-4-103 XS861 GAAV2001---- AC SOCKET TJC1-2A NXXX0070 XS501 2S SOCKET TJC2-2A NXXX0230 XS502 SPEAKER SOCKET TJC3-2A...
  • Page 57 MB1X0040---- Radiator HEATSINK FOR 8V H-N505 MB1X0114---- Radiator HEATSINK FOR 5V H-N503 MB1X0154---- Radiator HEATSINK FOR POWER H-N501 MB1X0113---- Radiator HEATSINK FOR SOUND H-N161 TESTING POINT TJC2-1A PTSX0010 XS904A SCREW ST3*８ N505 SCREW M2.5*12 N401 SCREW M3*10 SCXX0020 N161a、N161b V451、V1513、N503 M3 NUT SXN1A30--FF N401、161a、161b、503、V451、1513...
  • Page 58 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code Mica Slice Isolate The Washer W011、265、266、391、486、 JUMPER 5 mm LXXX0101 W791、929、 JUMPER LXXX0110 W582、683、684 W021，051，131、168、231 W242、243、244、245、264 W311*、356、358、368、373 W381、385、442、443、466 W467、471、493、501、531 W532、552、553、554、555 JUMPER 7.5 mm LXXX0102 W562、563、564、581、652 W662、663、721、760、762 W763、764、771、773、774 W786、821、841、861、862 W863、875、876、881、902...
  • Page 59 Components EASTKIT EAST KIT Ref.No Q'TY Parts Location Name Specification Parts Code Parts Code W121、148、152、153、154 W159、166、171、213*、214* W241、251、263、312*、313* W341、342、343、361、421 JUMPER 10 mm LXXX0103 W435、472、484、485、571 W535、643、650、653、655 W741、751、752、900、921 W922 W142、253、432、454、551 W621、665、673、674、681 JUMPER 12.5 mm LXXX0104 W682、731、781、872、873 W930 W162、163、164、221、331 W355、369、411、434、451 W452、453、463、464、465 JUMPER 15 mm LXXX0105 W641、642、644、656、672 W840、492...
  • Page 60 COMPONENT PARTS LIST Key Board) Components EASTKIT EAST KIT REF.No Q'TY Parts Location Name Specification Parts Code Parts Code JUMPER W1003 JUMPER 7.5mm W1001 D10B122J- RDB122J- CARBON RES RT13-1/6W-1.2KΩ-J NAAT R1006 D10B202J- RDB202J- CARBON RES RT13-1/6W-2KΩ-J NAAT R1007 D10B272J- RDB272J- CARBON RES RT13-1/6W-2.7KΩ-J NAAT...

  • Page 61: Circuit Diagram

    CIRCUIT DIAGRAM Model No: 21SHS3-CE.doc Version 1.0...

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