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TV - Conventional CRT, LCD Projectors, TFT, Plasma, Big Screen, HDTV, Home theater - Service manuals, repair tips

File information:
File name:Ch. 3P31.part1.rar
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Size:3072 kB
Extension:rar
Mfg:
Model:
Original:3P31, PCB-YZ5800A3P31100 🔎
Descr:Service Manual tv-structure: TDA93XXPS/N2/5I, TDA9859, TDA8944J, LA78040, KA5Q0765RTH
Group:Electronics > Consumer electronics > TV
Uploaded:19-08-2012
User:emoome
Multipart: 0  1  2

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Extracted files:1
File name Ch. 3P31.pdf

SC Number : 0009E SERVICE MANUAL PAL/SECAM/NTSC C21-RF80S/SN/SNT Destination Code O81 O51 751 19* 201 433 98* 121 3P31 Chassis CAUTION: Before servicing this chassis, it is important that the service technician read the " Important Safety Note" in this Service Manual. SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT COLOUR TELEVISION OCT 2003 Digital Media System Group, Hitachi Asia Ltd. TECHNICAL SPECIFICATION -3- TECHNICAL SPECIFICATION -4- CHASSIS BLOCK DIAGRAM -5- E IC BLOCK DIAGRAM IC 121 (Universal HI-FI Audio Processor) TDA9859 IC 161 (BTL Audio Amplifier) TDA8944J -6- IC BLOCK DIAGRAM IC 401 (Vertical Deflection Booster) STV9302A -7- IC BLOCK DIAGRAM IC 501(Video Output Amplifier) TDA6107Q 7 IC 601 (Power Switch) KA5Q0765RTH -8- IC BLOCK DIAGRAM IC 602 (Photo Transistor ) TLP621 TLP621 1 2 1:ANODE 2:CATHODE 3:EMITTER 4:COLLECTOR 4 3 IC 653 & IC 181& IC 652 (Regulators) L7800 Series REFERENCE VOLTAGE INPUT 1 SERIES PASS ELEMENT OUTPUT 2 CURRENT GENERATOR SOA PROTECTION STARTING CIRCUIT REFERENCE VOLTAGE ERROR AMPLIFIER THERRMAL PROTECTION GND 3 -9- IC BLOCK DIAGRAM IC 701 ( TV Signal Processor-Teletext ) TDA93XXPS/N2/5I -10- IC BLOCK DIAGRAM IC 861 ( Digital TV Sound Demodulator/Decoder) TDA9874AH -11- TRANSISTOR MARK PNP PNP NPN NPN NPN PNP B42 1 NPN C18 15 C2230 C24 82 C27 03 A10 13 E C INPUT GND A96 6 B PNP A1015 E C B E C B E C B E C B E C B E C B PNP B77 4 E C B NPN B42 0 PNP C21 20 NPN C22 16 B E C NPN C27 17 E C B E C B E C B B E C L7808 C1651C L7812 L7805 OUTPUT INPUT GND OUTPUT INPUT GND OUTPUT B C E -12- MAIN PCB TOP LAYER -13- MAIN PCB BOTTOM LAYER -14- AV TERMINALS PCB LAYOUT Side AV Terminals PCB Layout Control Panel PCB Layout Remote Control Unit PCB Layout -15- SERVICE ADJUSTMENTS ALIGNMENT INSTRUCTION (3P31) Before Servicing The TV Set The main power is 100~240V 50/60HZ . Please be careful when you are servicing. Don t short any two soldering points, which should not be shorted and don t touch any components, which should not be touched. Please disconnect the power plug form the wall outlet before servicing. For safety reasons, all components replaced should be identical with BOM. Before alignment, ensure the TV set has heat run for at least 30 minutes and degauss the CRT thoroughly with demagnetizer. The data of EEPROM must be stored before the adjustment for main chassis. Tools And Equipment For Adjustment Small - Screwdriver Without Inductance Pattern Generator DC Regulated power supply Digital Voltmeter Sweep Signal Generator 20MHz 2-channel Oscilloscope Power Adjustment Connect a 100W bulb across C616 and AC 200V power to CN601. If the bulb lights up,the voltage is normal and power is ok, else please proceed servicing. -16- SERVICE ADJUSTMENTS General Adjustment Enter factory mode Press SOUND MODE , RECALL , CH I/II keys on remote control unit to enter factory mode. Press 0-9 numeric keys to enter



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