Service Manual Remote Control Digital Dp42848 U S A-PDF Free Download

SERVICE MANUAL Remote Control Digital DP42848 U S A
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SAFETY INSTRUCTIONS, SAFETY PRECAUTIONS READING SHOULD NOT EXCEED 750 mV. AC VOLTMETER, WARNING The chassis of this receiver has a floating 5000 ohms per volt or more sensitivity. ground with the potential of one half the AC line voltage in. respect to earth ground Service should not be attempted by. anyone not familiar with the precautions necessary when. working on this type of equipment, TELEVISION, The following precautions must be observed RECEIVER. 1 An isolation transformer must be connected in the power. line between the receiver and the AC line before any ser. Good earth ground, vice is performed on the receiver 1500 ohm such as a water pipe. 10 watt conduit etc, 2 Comply with all caution and safety related notes provided.
inside the cabinet on the chassis and on the back, 3 When replacing a chassis in the cabinet always be certain. that all the protective devices are installed properly such 0 15 F 150V AC. as control knobs adjustment covers shields and barriers. 4 Before replacing the back cover of the set thoroughly AC OUTLET. inspect the inside of the cabinet to see that no stray parts To be touched to all of exposed metal parts. Voltmeter Hook up for Leakage Current Check, or tools have been left inside. Before returning any television to the customer the SERVICING ELECTROSTATICALLY SENSATIVE DEVICES. service technician must perform the following safety Semiconductors solid state devices that can be damaged. checks to be sure that the unit is completely safe to by static electricity are referred to as Electrostatically. operate without danger of electrical shock Sensitive ES devices Examples of typical ES devices are. Integrated Circuits IC Field Effect Transistors FET and. ANTENNA COLD CHECK chip components The following techniques should be. Remove AC plug from the 120 VAC outlet and place a observed strictly to reduce the occurrence of semiconduc. jumper across the two blades Connect one lead of an ohm tor damage due to electrostatic discharge. meter to the jumpered AC plug and touch the other lead to. 1 Immediately prior to handling any semiconductor com. each exposed antenna terminal UHF and VHF antenna ter. ponent or an assembly containing a semiconductor, minals The resistance must measure between 1M ohm and. device or devices discharge the electrostatic buildup on. 5 2M ohm Any resistance value below or above this range. your body by touching a known earth ground You may. indicates an abnormality which requires corrective action. also obtain and wear a commercially available discharg. LEAKAGE CURRENT CHECK ing wrist strap device, Plug the AC line cord directly into a 120 VAC outlet Do not CAUTION Be sure to remove the wrist strap before. use an isolation transformer for this check Use an AC volt applying power to any unit being serviced. meter that has 5000 ohms per volt or more sensitivity 2 After removing an ES equipped assembly place it on a. Connect a 1500 ohm 10 watt resistor paralleled by a 0 15 F conductive surface such as aluminum foil to prevent. 150 VAC capacitor between a known good earth ground buildup or exposure to static electricity. water pipe conduit etc and all exposed metal parts of the. 3 Use only grounded tip soldering irons to solder or unsol. cabinet antennas handle bracket metal cabinet screw. der ES devices, heads metal overlays control shafts etc Measure the AC.
voltage across the 1500 ohm resistor The AC voltage 4 Use only anti static solder removal devices Some suc. should not exceed 750 mV A reading exceeding 750 mV tion type devices can generate static electricity adequate. indicates that a dangerous potential exists The fault must to damage ES devices. be located and corrected Repeat the above test with the 5 A replacement ES device will come packaged in protective. receiver power plug reversed material conductive foam aluminum foil or some compa. NEVER RETURN A RECEIVER TO THE CUSTOMER rable conductive material Do Not remove an ES device. WITHOUT TAKING THE NECESSARY CORRECTIVE ACTION from its protective packaging unless you are prepared to. install it immediately, PRODUCT SAFETY NOTICE 6 Precisely prior to removing an ES device from its protective. When replacing components in a receiver always keep in packaging touch the protective packaging to the chassis or. mind the necessary product safety precautions Pay special assembly in which the device will be installed. attention to the replacement of components marked with a. CAUTION Be sure that no power is applied to the chassis or. in the parts list and in the schematic diagrams To ensure. circuit assembly, safe product operation it is necessary to replace those com. ponents with the exact same PARTS 7 Incidental body movements such as lifting a foot from a. carpeted floor or the rubbing of fabric together can gener. ate static electricity sufficient to damage ES devices. Therefore minimize all body movements while handling. exposed unpackaged ES devices, SERVICE ADJUSTMENTS. This set has an On screen Service Menu system included in. the CPU that allows remote operation for most of the ser. vice adjustments, Volume Enter Service Menu, ON SCREEN SERVICE MENU SYSTEM. 1 Enter the Service Menu, Turn off the receiver and disconnect the AC power.
While pressing the Volume button on the televi, sion reconnect the AC power supply The Service. Menu will now appear The remote can now be used, to make adjustments See Figure 1 below POWER. ITEM NO TITLE HEX DATA, 086 VOL 30, Figure 1 Service Menu Display. 2 Service Adjustments, Press the Cursor L or M key to select the desired ser. vice menu item you want to adjust See page 4 for, the On screen Service Menu.
Use the Cursor or key to adjust the data, The or key will increase or decrease the data. sequentially, 3 Exit from the Service Menu, Press the MENU key to turn off the Service Menu. Exit Service Menu, Select Item, Adjust the data, ON SCREEN SERVICE MENU. Table 1 ON SCREEN SERVICE MENU, When IC801 EEPROM is replaced check the bus data to confirm they are the same as below See page 3 for. On Screen Service Menu access and adjustments, No Title Initial Data Note.
1A0 MUTE A0h Audio mute at Power ON, 086 VOL 30h Volume setup inspection. 087 OP1 00h Option 1 Data HDMI, 088 OP2 30h Option 2 Data Display Panel. 101 1R00 00h ROM Correction Data, 102 1R01 00h ROM Correction Data. 197 2R47 00h ROM Correction Data, 198 2R48 00h ROM Correction Data. All data except in gray box area is fixed Do not change for correct operating. Data in gray box is initial and can be set according to adjusment information. PROGRAM CODES, The microprocessor used in this model is a multi purpose type and is used in several different models To ensure.
proper operation and the correct features for your particular model the program codes must be correct. Note 1 Option Data 1 NO 087 OP1 should be hexadeci Note 2 Option Data 2 NO 088 OP2 should be hexadeci. mal 00 See 087 above If this program code is wrong the mal 30 See 088 above If this program code is wrong the. TV will not operate properly TV will not operate properly. POWER FAILURE CIRCUIT, CPU IC800 is programmed so the set will go to standby Check the following if the unit is turned off by the power. mode when there is circuit failure as described below failure detector. Refer to Block Diagram Power Lines, 1 Disconnect the AC power cord 120V AC line for a short. This unit is equipped with a Power Failure Detector function. included in the CPU which checks for an abnormal condi. tion in the chassis power supplies 2 Connect a DC Voltmeter to the circuits shown below. If while the power is on a failure is caused by any of the 3 Press the Power key and check for the proper voltage. following that results in a low voltage supply the CPU will supplies. turn the unit off in 1 5 seconds to prevent further damage 4 If any of these voltages is low the power failure detec. tor should turn the unit off within three seconds, Failure within the power supply circuits 5 Check all circuits shown below. A short circuit in the load side from the supply Note If power failure is detected 3 times in 15 minutes. the set will enter the standby mode and cannot be, Power Failure Detected voltage failure for circuit switched On To reset the operating programs of the. Connected to IC800 pin 32 and pin 23 CPU it is necessary to disconnect the AC cord for a. Normal High Failure Low short time, If while the power is off the power is switched on and any.
of these failures remains uncorrected the CPU will shut off. the power within three seconds, D1621 D1620, Power Fail Q810 Q811 D Q1609. Inverter K8B 32 3 3V, 1 Power On, Power Board Power Fail D1653. LVDS IC1650, D6052 D6051, IC1681 2 D1671, 12V IC1670. MECHANICAL DISASSEMBLY, I This LCD TV uses several different kinds of screws Using the correct screw is required. to prevent damage, I The gaskets are provided to prevent interference to other radio and television.
receivers The gaskets must be returned to their previous positions after servicing. I Lead wires must be redressed to previous positions after servicing. BACK CABINET REMOVAL, Remove 13 screws A 4X14 and 1 screw B 3X6 to. take the back Cabinet off, MAIN BOARD POWER UNIT AND STAND REMOVAL. Power Unit, Main Board, 1 Stand Removal, Position TV face down on a padded or cushioned surface to. protect the screen and finish, Remove 4 screws E 6X16 and remove stand. 2 Main Board Removal, Remove 3 screws C 3X8 Terminal side and 5 screws.
D 3X10 to take the main board off, 3 Power Unit Removal. Remove 6 screws D 3X10 to take the power unit off, LCD PANEL REMOVAL. 1 Disconnect the lead wires from LCD panel speakers and control board. 2 Remove 8 screws A 4X14 and 4 screws F 4X8 to take the mounting bracket chassis base off. 3 Lift the LCD panel from the front cabinet, CONTROL BOARD AND SPEAKER REMOVAL. Remove 2 screws A 4X14 to take the control board off. SPEAKER REMOVAL, Remove 4 screws B 4X14 to take off each speaker. CHASSIS ELECTRICAL PARTS LIST, CAUTION To Protect against electrical shock and for continued product safety refer to SAFETY PRECAUTIONS.
and PRODUCT SAFETY NOTICE on Page 2, PRODUCT SAFETY NOTICE. PRODUCT SAFETY SHOULD BE CONSIDERED WHEN A REPLACEMENT IS MADE IN ANY AREA OF A RECEIVER. COMPONENTS INDICATED BY A IN THIS PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE. COMPONENTS IN WHICH SAFETY CAN BE OF SPECIAL SIGNIFICANCE IT IS PARTICULARLY RECOMMENDED. THAT ONLY PARTS DESIGNATED ON THE FOLLOWING PARTS LIST BE USED FOR COMPONENT REPLACEMENT. DESIGNATED BY A NO DEVIATIONS FROM RESISTANCE WATTAGE AND VOLTAGE RATINGS MAY BE MADE. FOR REPLACEMENT ITEMS DESIGNATED BY A, Note Schematic part location numbers may not always match with the part descriptions. The part descriptions are correct and should be used. CAPACITORS RESISTORS, NOTES NOTES, Read description of the Capacitor as follows Read description of the Resistor as follows. Example Example, CERAMIC 100P K 50V CARBON 4 7K J A 1 4W. Rated Voltage Rated Wattage, Performance Symbols, Tolerance Symbols A General B Non flammable.
Less than 10pF Z Low noise, A Not specified B 0 1pF C 0 25pF Other Temperature coefficient. D 0 5pF E 0 1pF F 1PF Tolerance Symbols, G 2pF H 0 1 0pF L 0 0 1pF A 0 05 B 0 1 C 25. R 0 25 0pF S 0 0 25pF D 0 5 F 1 G 2, More than 10pF J 5 K 10 M 20. A Not specified B 0 1 C 0 25 P 5 15, D 0 5 F 1 G 2. H 3 J 5 K 10 Rated Value ohms, L 15 M 20 N 30 K 1 000 M 1 000 000.
P 100 0 Q 30 10 T 50 10 Material, U 75 10 V 20 10 W 100 10 CARBON Carbon. X 40 20 Y 150 10 Z 80 20 MT FILM Metal Film, OXIDE MT Oxide Metal Film. Rated value P pico farad U micro farad SOLID Composition. MT GLAZE Metal Glaze, Material WIRE WOUND Wire Wound. CERAMIC Ceramic CERAMIC RES Ceramic, MT PAPER Metallized Paper FUSIBLE RES Fusible. POLYESTER Polyester, MT POLYEST Metallized Polyester.
POLYPRO Polypropylene, MT POLYPRO Metallized Polypropylene. COMPO FILM Composite Film, MT COMPO Metallized Composite. STYRENE Styrene, TA SOLID Tantalum Solid, AL SOLID Aluminium Solid. ELECT Electrolytic, NP ELECT Non polarised Electrolytic. OS SOLID Aluminium Solid with Organic, Semiconductive Electrolytic.
Schematic Schematic, Part No Description Part No Description. Location Location, CAPACITORS C1618 CK1H392KLZBNG CERAMIC 3900P K 50V. C001 CPXLB1C100YAJ NP ELECT 10U M 16V C1620 CK1H103KLZBNG CERAMIC 0 01U K 50V. CPXLB1C100ZAJ NP ELECT 10U M 16V C1621 CK1H104ZLZFNG CERAMIC 0 1U Z 50V. C002 CK1H104ZLZFNG CERAMIC 0 1U Z 50V C1622 CK1H103KLZBNG CERAMIC 0 01U K 50V. C006 CEXLB1H100VDJ ELECT 10U M 50V C1623 CK1H103KLZBNG CERAMIC 0 01UK 50V. C007 CEXLB1C101VDJ ELECT 100U M 16V C1624 CK1H103KLZBNG CERAMIC 0 01U K 50V. C008 CK1H102KLZBNG CERAMIC 1000P K 50V C1625 CK1H104ZLZFNG CERAMIC 0 1U Z 50V. C009 CK1H102KLZBNG CERAMIC 1000PK 50V C1626 CK1H104ZLZFNG CERAMIC 0 1U Z 50V. C013 CPXLB1C100YAJ NP ELECT 10U M 16V C1627 CE0J102MZVALC ELECT 1000U M 6 3V. CPXLB1C100ZAJ NP ELECT 10U M 16V C1628 CEXLB0J102VDJ ELECT 1000U M 6 3V. C015 CEXLB1C222VDJ ELECT 2200U M 16V C1629 CK1H104ZLZFNG CERAMIC 0 1U Z 50V. C016 CEXLB1H100VDJ ELECT 10U M 50V C1630 CK1H104ZLZFNG CERAMIC 0 1U Z 50V. C017 CEXLB1H100VDJ ELECT 10U M 50V C1631 CK1H104ZLZFNG CERAMIC 0 1U Z 50V. C801 CK1A105KLZBNG CERAMIC 1U K 10V C1641 CE1E102MZVANC ELECT 1000U M 25V. C802 CK1H104KLZBNG CERAMIC 0 1U K 50V C1642 CK1H104ZLZFNG CERAMIC 0 1U Z 50V. SERVICE MANUAL Remote Control Digital Color Television DP42848 U S A CANADA ORIGINAL VERSION Chassis No P42848 00 NOTE Match the Chassis No on the unit s back cover with the Chassis No in the Service Manual If the Original Version Service Manual Chassis No does not match the unit s additional Service Literature is required You must refer to Notices to the Original

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