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akira 21SWS1 BN Service Manual

Chassis: sanyo s01
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Summary of Contents for akira 21SWS1 BN

  • Page 1: Service Manual

    Colour TV Service Manual...
  • Page 2 -2 - Chas is: Sanyo S01 Model: 21SWS1/BN Model No.: 21SWS1_BN Version: 1.0...

  • Page 3: Table Of Contents

    -3 - CONTENTS SAFETY INSTRUCTION........................4 SPECIFICATION............................. 8 KEY ICS & ASSEMBLIES........................9 SIGNAL PROCESS ..........................10 SYSTEM BLOCK DIAGRAM......................21 IC DATA & SERVICE DATA ........................ 24 CIRCUIT ADJUSTEMENT........................37 SERVICE MODE & BUS DATA......................43 TROUBLE SHOOTING FLOW CHART....................48 PART LIST .............................

  • Page 4: Safety Instruction

    -4 - SAFETY INSTRUCTIONS Warning: Before servicing this chassis, read the “X-Ray radiation precaution”, “Safety precaution” and “product safety notice” instructions below. X-RTY Radiation precaution 1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit X-ray radiation as result of excessive EHT voltage.
  • Page 5 -5 - 5. When replacing wires or components to terminals or tags, wind the leads around the terminal before soldering. When replacing safety components identified by the international hazard symbols in the circuit diagram and part list, it must be the company-approved type and must be mounted as the original.
  • Page 6 -6 - Avoid exposing the television receiver to direct, Sunlight and other source of the heat. Do not stand the television receiver directly on other produces, which give off heat E. g. video Cassette players. Audio amplifiers. Do not block the ventilation holes in the back cover.
  • Page 7 -7 - Do not place your television on an unstable cart stand, shelf or table. Serious injury to an individual, and damage to the television, may result if it should fall. When the television receiver is not used for an extended period of time, it is advisable to disconnect the AC power cord from the AC outlet.

  • Page 8: Specification

    -8 - SPECIFICATION Model Number 21S01 RF system Color system: PAL, NTSC3.58, NTSC4.43 Sound system: D/K, I, M, B/G Video system PAL, NTSC3.58, NTSC4.43 (50/60Hz) Receiving channel VHF: C1 ~ C12 UHF: C3 ~ C57 CATV: Z1 ~ Z37 Programs preset Antenna input 75Ω...

  • Page 9: Key Ics & Assemblies

    -9 - KEY ICS AND ASSEMBLIES Serial No. Position No. Type Function Description N101 LA76818A Small signal processor N451 TDA9302 Vertical output circuit /LA78040 N601, N602 LA4285 /LA4287 3W /5W sound power amplifier N701 LC863328B-52G5 System control micro processor N801 CD4053BE Audio /video switch circuit N551...

  • Page 10: Signal Process

    -10 - SIGNAL PROCESS 1. HIGH /INTERMEDIATE FREQUENCY SIGNAL PROCESSOR Through the high /intermediate frequency signal processor, the RF TV signal received by the antenna is high-frequency amplified and converted to develop and output an IF signal, then are IF amplified and demodulated to develop a video signal and SIF signal as well as AFT control signal and AGC control signal.
  • Page 11 -11 - In the IF filtering circuit V101, VD101, R116, R117, R106, R112 and R115 are formed into an IF absorption selection circuit, which is controlled by the level from N701’s Pin35 output high level, V101 saturates and conducts, and R106 is integrated into the paralleled resonator comprising R112 and VD101, by which the resonating frequency dot is moved to low frequency section and IF and amplitude frequency characteristics are stretched.
  • Page 12 -12 - All the color trap in the luminance channel, band pass filtering circuit in the chroma channel and filter adjuster are controlled by the broadcast system identifying circuit and I2C bus to ensure correct and complete Y /C separation when different-system signals received.
  • Page 13 -13 - To correctly process chroma signals, firstly identify the input chroma signals. The I2C bus controls LA76818A to identify chroma signals. To identify chroma signals, identify signal systems and subcarrier frequency. For NTSC signals, the subcarrier modulated by two color difference signals will not be progressively out-phased while the subcarrier modulated by R-Y color different signal PAL will be progressively out-phased.
  • Page 14 -14 - The demodulated color difference signals are sent into the color difference signal selector after clamped by the clamper. If with SECAM demodulation function, the circuit also sends color difference signals output from the SECAM demodulator to the color difference signal selector from Pin34 and Pin36. Under the control of the I2C bus, the color difference signals selected by the selector are sent to the base band delay line and adder respectively for further processing.
  • Page 15 -15 - d) White balance adjuster Traditional white balance is adjusted through adjusting the bright and dark balance potentiometers of the CRT drive circuit. The white balance adjuster of the chassis is equipped in LA76818A, which is performed by the CPU through the I C bus.
  • Page 16 -16 - In the SPLL circuit, the frequency at which a SIF carrier signal is developed ranges from 4.5M to 6.5M which is used for demodulating M, B/G, I or D/K SIF signal is received, firstly perform discrimination adjustment mentioned above and calibrate the SIF carrier generated from SPLL.
  • Page 17 -17 - In addition, LA76818A can automatically control operating mode of the vertical output circuit by means of the I2C bus signal with 50/60Hz vertical frequency auto identifying circuit built-in, ensuring picture’s vertical size unchanged with 50Hz or 60Hz vertical frequency. b) Sync separator The sync separator in LA76818A consists of a horizontal sync separator (including a sync separation triode T and comparison amplifier 1) and vertical sync separator.
  • Page 18 -18 - As the chassis can receive multi-system signals, horizontal scan frequency differs dependent on different-system TV signals. To make the horizontal oscillating signal in the horizontal counting frequency divider, which are controlled by the CPU through the I C bus. The CPU counting divider to count up or count down and counting amount according to size and direction of the phase.
  • Page 19 -19 - Vertical divider The horizontal frequency oscillation pulse from the horizontal scan count divider is sent to the vertical count divider. Meanwhile the vertical sync signal from the vertical sync separator (frequency separator) is also sent to the vertical count divider. Controlled by the vertical sync pulse, the circuit counts horizontal frequency pulses and identifies and correct vertical frequency, all of which are controlled by the CPU through the I...
  • Page 20 -20 - amplifier. The amplified vertical sawtooth voltage is output from Pin5 to the deflection yoke to generate deflection current. R452 and C459 filter out of horizontal frequency element inducted by the horizontal scan circuit. R460 and C458 eliminate parasitic oscillation generated when the deflection yoke and distributed capacitors resonate.

  • Page 21: System Block Diagram

    -21 - SYSTEM BLOCK DIAGRAMS Model No.: 21SWS1_BN Version: 1.0...
  • Page 22 -22 - Model No.: 21SWS1_BN Version: 1.0...
  • Page 23 -23 - Model No.: 21SWS1_BN Version: 1.0...

  • Page 24: Ic Data & Service Data

    -24 - IC DATA AND SERVICE DATA LA76818A SMALL SIGNAL PROCESSING CIRCUIT 1. Features LA76818A is a multi system color TV specific monolithic IC developed by SANYO Co. in 2002, which is controlled by the I C bus. LA76818 comprises a tuning circuit and all small signal processing circuit including a PIF /SIF /luminance and chroma signal processing circuit, PAL /NTSC processing circuit, RGB signal processing and controlling circuit, horizontal /vertical small signal processing, SIF processing and demodulating circuit and volume controlling circuit.
  • Page 25 -25 - 2. Block diagram Model No.: 21SWS1_BN Version: 1.0...
  • Page 26 -26 - LA4285 3W POWER AMPLIFIER AND STEREO 1. Feature TV sound output Exchangeable with LA4285 (3W) /LA4287 (5W) pin Package SIP-10HD (Pitch=2.54mm, straight type) Heat protection loop and over voltage protection loop built in Power output: 3W (Vcc=19V /RL=8Ω) LA4285 5W (Vcc=22V /RL=8Ω) LA4287 2.
  • Page 27 -27 - 3. Refer to table 5 about functions and data of the LA4285’s Pins Model No.: 21SWS1_BN Version: 1.0...
  • Page 28 -28 - LA78040 /STV9302 (N451) VERTICAL DEFLECTION OUTPUT CIRCUIT 1. Features Low power dissipation due to built-in pump-up circuit Vertical output circuit Thermal protection circuit built in Excellent crossover characteristics DC coupling possible Feature Power amplifier Flyback generator Output current up to 2 App Thermal protection Description The STV9302 is a vertical deflection booster designed for monitor and TV applications.
  • Page 29 -29 - 2. Block diagram 3. Refer to table 6 about functions and service data of LA78040’s Pins Model No.: 21SWS1_BN Version: 1.0...
  • Page 30 -30 - Table 2 functions and service data of LA76818A (N101)’s Pins DT890D Multimeter Voltage of Ground Resistance (Ω) Pin (V) Measure with Red Measure with Function Description Probe while black Probe while grounding Black grounding red probe. probe Audio signal output 2.44 /2.28 Audio frequency discrimination output 2.34...
  • Page 31 -31 - DT890D Multimeter Voltage of Ground Resistance (Ω) Pin (V) Measure with Red Measure with Function Description Probe while black Probe while grounding Black grounding red probe. probe Power supply of 1H baseband delay 4.45 circuit Power filter of 1H baseband delay ∞...
  • Page 32 -32 - Table 3 Functions and service Data of LC863328B-52G5 DT890D Multimeter Voltage of Ground Resistance (KΩ) Pin (V) Measure with Red Measure with Function Description Probe while black probe while grounding Black grounding red probe. probe Select UHF (BAND OPTION select 0.02V 22.1 22.23...
  • Page 33 -33 - DT890D Multimeter Voltage of Ground Resistance (KΩ) Pin (V) Measure with Red Measure with Function Description Probe while black probe while grounding Black grounding red probe. probe IIC data (other IC use) 4.7V 22.1 22.14 IIC clock (other IC use) 4.7V 22.21 22.26...
  • Page 34 -34 - Table 4 Functions and service data of ST24C08 (N702)’s Pins DT890D Multimeter Voltage of Ground Ground Pin (V) Resistance (Ω) Resistance (KΩ) Function Description Measure with Red Measure with Probe while black probe while grounding Black grounding red probe.
  • Page 35 -35 - Table 6 functions and service data of LA78040 /STV9302 (N451)’s Pins DT890D Multimeter Voltage of Ground Resistance (Ω) Pin (V) Measure with Red Measure with red Function Description Probe while probe while grounding Black grounding black probe. probe Inverting input terminal 2.23 Supply voltage...

  • Page 36: Circuit Adjustement

    -36 - CIRCUIT ADJUSTMENT Item +B adjustment, TV signal receiving Measuring equipment TV SG (Signal generator) Digital multi-meter Preparation before adj. The set is turned on Connect the TV SG to RF input terminal of the set. ADJUSTMENT PROCEDURE 1. Turn RP551 potentiometer to adjust B+ to specified voltage. 2.
  • Page 37 -37 - Item RF. AGC adjustment Measuring equipment SG and digital multi meter service remote control Preparation before Adj. Connect a digital multi meter to TP101 point on the chassis. 1. Receive Philips circular testing signal. 2. Adjust the signal input level to 62db ± 1db. 3.
  • Page 38 -38 - 3. Vertical linearity Receive Philips circular test signal (PAL system). b. Press PROD (FACTORY) button on the maintenance use remote controller to start adjusting mode. Press CH ± button to select V.LINE option. Use VOL ± button to adjust the value of V.LINE till the vertical linearity reaches the best.
  • Page 39 -39 - Item Focus adjustment Measuring Equipment Preparation before Adj. Brightness, contrast and color should be set in standard. Adjustment procedure 1. Receive the cross-hatch pattern signal. 2. Turn the focus adjusting VR watching the screen and adjust the vertical line of mark to make the most thin.
  • Page 40 -40 - Item White balance adjustment Measuring Equipment SG and white balance meter Service remote controller Preparation before Adj. Warm up the set for more than 30 min. Brightness, contrast and color should be set in standard 1. Operation method Adjustment procedure a) Press PROD button to enter into “B/W BALANCE”...
  • Page 41 -41 - BUTTON FUNCTION Sub brightness + Red bias + Green Bias + Blue Bias + BUTTON FUNCTION Sub brightness - Red bias - Green bias - Blue bias - Item Screen character display adjustment Measuring Equipment Service remote controller Preparation before Adj.
  • Page 42 -42 - SERVICE MODE AND BUS DATA 1. User’s remote control unit enabling “FACTORY” button function User’s remote control unit has no “PROD (producer)” button. This may bring troubles to maintenance after TV sets exit the factory. So a substitution “PRO” function is specially designed in the software.

  • Page 43: Service Mode & Bus Data

    -43 - Page 2 (MENU 1) RF.AGC RF.AGC adjustment (range: 0~63) VOLUME OUT Internal volume output (range: 0~127): only when stereo function is selected can it work R-Y /B-Y G.BL Corresponding to R-Y /B-Y GAIN BALANCE option of decoding chip (range: 0~15), normally “8” is selected R-Y /B-Y ANG Corresponding to R-Y /B-Y ANGLE option of decoding chip (range: 0~15), normally “8”...
  • Page 44 -44 - Page 4 (MENU 3) POWER OPTION POWER mode upon cold start-up (OFF /REMEMBER /ON) POWER LOGO Power logo option (ON /OFF) SCREEN TYPE SCREEN OPT. Screen option when turning on /off (OFF /P/ON /P.OFF /ALL) SCREEN TIME Black background time interval before drawing curtain: (0~7 seconds) SCR.
  • Page 45 -45 - Page 7 (MENU 6) STEREO OPT STEREO IC WOOF OPTION AV IF STATUS AD POWER KEY SUB. CONT. SUB. COLOR SUB. SHARP SUB. TINT B.B. BRIGHT Page 8 (MENU 7) PAL OPTION N3.58 OPTION N4.43 OPTION SECAM OPTION COLOR AUTO 4.5M OPTION 5.5M OPTION...
  • Page 46 -46 - Page 10 (MENU 9) VOL. FILTER VIF. SYS. SW BRT. ABL. DEF MID. STP. DEF BRT. ABL. TH RGB TEMP SW. YUV OPTION FSC. /C-SYNC VCO ADJ. SW. C. VCO. ADJ Page 11 (MENU 10) VREST TIMING G-Y ANGLE C.

  • Page 47: Trouble Shooting Flow Chart

    -47 - TROUBLE SHOOTING FLOW CHART No raster Check N551 /V554 Check whether the line Check V513 /V512 /V511 /V501 /VD554 /R569 of B6 9V is normal Check VD551 /V551 Check whether the line of B1 110V is normal Check V431 waveform Check voltage of Replace N101 normal or not...
  • Page 48 -48 - No picture Check the video signal Check N101 /T101 of N101 /46 pin /A101 /N703 Check the video signal Check voltage cross Replace N801 of N801 /13 pin N101 /11 /13 pins Check N701 Check the video signal Check C211 of N101 /42pin Check the video signal...
  • Page 49 -49 - No sound Check waveform Check waveform of N101 /52pin of N101 /52pin Check waveform Check N101 of N101 /1pin Check waveform Check C822 /R834 /R844 of N801 /4pin Check waveform Check waveform on N801 /15pin of N101 /52pin Check waveform of N601 /N602 /3 Check voltage of...

  • Page 50: Part List

    -50 - PART LIST Location No. Part No. Name Type R452 D10B4R7J-T CARBON RES RT13-1/6W-4.7 ±5% R617 D10B4R7J-T CARBON RES RT13-1/6W-4.7 ±5% R627 D10B4R7J-T CARBON RES RT13-1/6W-4.7 ±5% R111 D10B330J-T CARBON RES RT13-1/6W-33 ±5% R243 D10B330J-T CARBON RES RT13-1/6W-33 ±5% R935 D10B330J-T CARBON RES...
  • Page 51 -51 - Location No. Part No. Name Type R778 D10B561J-T CARBON RES RT13-1/6W-560 ±5% R780 D10B561J-T CARBON RES RT13-1/6W-560 ±5% R409 D10B681J-T CARBON RES RT13-1/6W-680 ±5% R610 D10B681J-T CARBON RES RT13-1/6W-680 ±5% R620 D10B681J-T CARBON RES RT13-1/6W-680 ±5% R904 D10B681J-T CARBON RES RT13-1/6W-680 ±5% R914...
  • Page 52 -52 - Location No. Part No. Name Type R408 D10B222J-T CARBON RES RT13-1/6W-2.2K ±5% R707 D10B222J-T CARBON RES RT13-1/6W-2.2K ±5% R759 D10B222J-T CARBON RES RT13-1/6W-2.2K ±5% R831 D10B222J-T CARBON RES RT13-1/6W-2.2K ±5% R705 D10B272J-T CARBON RES RT13-1/6W-2.7K ±5% R900 D10B272J-T CARBON RES RT13-1/6W-2.7K ±5% R272...
  • Page 53 -53 - Location No. Part No. Name Type R776 D10B822J-T CARBON RES RT13-1/6W-8.2K ±5% R412 D10B103J-T CARBON RES RT13-1/6W-10K ±5% R413 D10B103J-T CARBON RES RT13-1/6W-10K ±5% R561 D10B103J-T CARBON RES RT13-1/6W-10K ±5% R564 D10B103J-T CARBON RES RT13-1/6W-10K ±5% R566 D10B103J-T CARBON RES RT13-1/6W-10K ±5% R630...
  • Page 54 -54 - Location No. Part No. Name Type R515 D10B223J-T CARBON RES RT13-1/6W-22K ±5% R746 D10B223J-T CARBON RES RT13-1/6W-22K ±5% R747 D10B223J-T CARBON RES RT13-1/6W-22K ±5% R748 D10B223J-T CARBON RES RT13-1/6W-22K ±5% R749 D10B223J-T CARBON RES RT13-1/6W-22K ±5% R751 D10B223J-T CARBON RES RT13-1/6W-22K ±5% R753...
  • Page 55 -55 - Location No. Part No. Name Type R940 D10C330J-T CARBON RES RT14-1/4W-33 ±5% R400 D10C151J-T CARBON RES RT14-1/4W-150 ±6% R582 D10C471J-T CARBON RES RT14-1/4W-470 ±5% R581 D10C561J-T CARBON RES RT14-1/4W-560 ±5% R453 D10C182J-T CARBON RES RT14-1/4W-1.8K ±5% R526 D10C222J-T CARBON RES RT14-1/4W-2.2K ±5% R565...
  • Page 56 -56 - Location No. Part No. Name Type R273 S10B472J-T METALFILM RES RJ24-1/4W-4K7-1% R531 C10D246K-T Glass-Glazed Fixed RES RI40-1/2W-24M ±5% R569 F10DR47J-C FUSE RES RF10-1/2W-0.47 ±5% R550 F10D1R0J-C FUSE RES RF10-1/2W-1 ±5% R562 F10D1R0J-C FUSE RES RF10-1/2W-1 ±5% R930 F10F1R8J-C FUSE RES RF10-1/2W-1.8 ±5% R471...
  • Page 57 -57 - Location No. Part No. Name Type R434 S10F271J-C OXIDE FILM RES RY17-2W-270 ±5% R491 S10F103J-C OXIDE FILM RES RY17-2W-10K ±5% R551 S10F123J-C OXIDE FILM RES RY17-2W-12K ±5% R718 S10F123J-C OXIDE FILM RES RY17-2W-12K ±5% R525 S10G560J-C OXIDE FILM RES RY18-3W-56 ±5% R273 S10B472J-T...
  • Page 58 -58 - Location No. Part No. Name Type C205 C2FF103Z-T CERAMIC CAPA. CT1-06A-2F4-50/63V-0.01uF-Z C245 C2FF103Z-T CERAMIC CAPA. CT1-06A-2F4-50/63V-0.01uF-Z C274 C2FF103Z-T CERAMIC CAPA. CT1-06A-2F4-50/63V-0.01uF-Z C275 C2FF103Z-T CERAMIC CAPA. CT1-06A-2F4-50/63V-0.01uF-Z C277 C2FF103Z-T CERAMIC CAPA. CT1-06A-2F4-50/63V-0.01uF-Z C279 C2FF103Z-T CERAMIC CAPA. CT1-06A-2F4-50/63V-0.01uF-Z C405 C2FF103Z-T CERAMIC CAPA.
  • Page 59 -59 - Location No. Part No. Name Type C105 E20C4R7M-T Electrolytic Capa. CD110-16V-4.7uF -M C203 E20C4R7M-T Electrolytic Capa. CD110-16V-4.7uF -M C104 E20C100M-T Electrolytic Capa. CD110-16V-10uF -M C276 E20C100M-T Electrolytic Capa. CD110-16V-10uF -M C104 E20C100M-T Electrolytic Capa. CD110-16V-10uF -M C276 E20C100M-T Electrolytic Capa.
  • Page 60 -60 - Location No. Part No. Name Type C933 E20C471M-T Electrolytic Capa. CD110-16V-470uF -M C612 E20D221M-T Electrolytic Capa. CD110-25V-220uF -M C622 E20D221M-T Electrolytic Capa. CD110-25V-220uF -M C564 E20D471M-T Electrolytic Capa. CD110-25V-470uF -M C565 E20D471M-T Electrolytic Capa. CD110-25V-470uF –M C457 E20D102M Electrolytic Capa.
  • Page 61 -61 - Location No. Part No. Name Type C602 F20F222J-T FILM CAPA CL11-50V/63V-2200PF-K C603 F20F222J-T FILM CAPA CL11-50V/63V-2200PF-K C515 F22F123J-T FILM CAPA CL21X-50V/63V-0.012uF-K C406 F22F153J-T FILM CAPA CL21X-50V/63V-0.015uF-K C120 F20F223K-T FILM CAPA CL11-50V/63V-0.022uF-K C517 F20F223K-T FILM CAPA CL11-50V/63V-0.022uF-K C124 F20F333K-T FILM CAPA CL11-50V/63V-0.033uF-K C207...
  • Page 62 -62 - Location No. Part No. Name Type VD620 DR0001XX-T DIODE IS1555/IN4148A VD621 DR0001XX-T DIODE IS1555/IN4148A VD622 DR0001XX-T DIODE IS1555/IN4148A VD631 DR0001XX-T DIODE IS1555/IN4148A VD901 DR0001XX-T DIODE IS1555/IN4148A VD902 DR0001XX-T DIODE IS1555/IN4148A VD903 DR0001XX-T DIODE IS1555/IN4148A VD911 DR0001XX-T DIODE IS1555/IN4148A VD921 DR0001XX-T DIODE...
  • Page 63 -63 - Location No. Part No. Name Type N451 IXXX0142 LA78040/STV9302 N702 IXXX0173 BR ST24C08-W V511 RXA1015X-T TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y V631 RXA1015X-T TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y V702 RXA1015X-T TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y V801 RXA1015X-T TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y V806 RXA1015X-T TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y V807 RXA1015X-T TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y V931 RXA1015X-T TRANSISTOR 2SA1015Y/2SA608/KTA1266-Y...
  • Page 64 -64 - Location No. Part No. Name Type Z101 FS0008XX SAW FILTER38.9M F2966M F501 FXXX0020 FUSE 3.15A 250V A701 RXXX0016 REMOTE RECEIVER HS0038/AT138A G201 XC0004XX-A Crystal Oscillator JA18C/JA18B 4.43MHz ∞ G701 Porcelain 32.768KHz A101 TUNER ET-5C1E-EV100K Model No.: 21SWS1_BN Version: 1.0...

  • Page 65: Circuit Board Diagrams

    -65 - CIRCUIT BOARD DIAGRAMS Model No.: 21SWS1_BN Version: 1.0...

  • Page 66: Model No.: 21Sws1_Bn

    -66 - odel No.: 21SWS1_BN ersion: 1.0...
  • Page 67 -67 - M odel No.: 21SWS1_BN Version: 1.0...
  • Page 68 -68 - Model No.: 21SWS1_BN Version: 1.0...

  • Page 69: Exploded View

    -69 - EXPLODED VIEW Model No.: 21SWS1_BN Version: 1.0...
  • Page 70 -70 - EXPLODED VIEW Model No.: 21SWS1_BN Version: 1.0...

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