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SERVICE MANUAL This Service Manual is for the LH850-M26 (A0CA2EP) model. For the LH850-M26 (A0CA2EP) model, the letter (A0CA2EP) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label below. Serial No. Label "A0CA2EP"...
IMPORTANT SAFETY PRECAUTIONS Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
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4. Hot Chassis Warning - 7. Product Safety Notice - Some electrical and mechanical parts have special safety-related a. Some TV receiver chassis are electrically characteristics which are often not evident from connected directly to one conductor of the AC visual inspection, nor can the protection they give power cord and maybe safety-serviced without necessarily be obtained by replacing them with...
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Precautions during Servicing A. Parts identified by the ! symbol are critical for safety. Replace only with part number specified. B. In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements.
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Safety Check after Servicing Examine the area surrounding the repaired location Chassis or Secondary Conductor for damage or deterioration. Observe that screws, parts and wires have been returned to original posi- tions. Afterwards, perform the following tests and con- Primary Circuit firm the specified values in order to verify compliance with safety standards.
STANDARD NOTES FOR SERVICING Circuit Board Indications How to Remove / Install Flat Pack-IC 1. The output pin of the 3 pin Regulator ICs is 1. Removal indicated as shown. With Hot-Air Flat Pack-IC Desoldering Machine: 1. Prepare the hot-air flat pack-IC desoldering Top View Bottom View machine, then apply hot air to the Flat Pack-IC...
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With Soldering Iron: With Iron Wire: 1. Using desoldering braid, remove the solder from 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, flux which is applied to all pins of the flat pack-IC, you can remove it easily.
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2. Installation Instructions for Handling Semi- 1. Using desoldering braid, remove the solder from conductors the foil of each pin of the flat pack-IC on the CBA Electrostatic breakdown of the semi-conductors may so you can install a replacement flat pack-IC more occur due to a potential difference caused by easily.
CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Removal Step/ Remove/*Unhook/ This flowchart indicates the disassembly steps for the Loc. Part Fig. Unlock/Release/ cabinet parts, and the CBA in order to gain access to Note Unplug/Unclamp/ item(s) to be serviced. When reassembling, follow the Desolder steps in reverse order.
ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: “CBA” is abbreviation for How to set up the service mode: “Circuit Board Assembly.” Service mode: Note: Electrical adjustments are required after 1. Turn the power on. replacing circuit components and certain mechanical parts. It is important to perform 2.
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1. Purity Check Mode 2. VCOM Adjustment This mode cycles through full-screen displays of red, Test Point Adj. Point green, blue, and white to check for non-active pixels. 1. Enter the Service mode. Screen buttons 2. Each time pressing [7] button on the remote M.
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The White Balance Adjustment should be 5. [CUTOFF] Press [1] button to select “COR” for Red Cutoff performed when replacing the LCD Panel adjustment. Press [3] button to select “COB” for or Digital Main CBA. Blue Cutoff adjustment. [DRIVE] 3. White Balance Adjustment Press [4] button to select “DR”...
HOW TO INITIALIZE THE LCD TELEVISION How to initialize the LCD television: 1. Turn the power on. 2. Enter the service mode. (Refer to page 5-1.) - To cancel the service mode, press [ ] button on the remote control unit. 3.
FIRMWARE RENEWAL MODE Equipment Required [Update procedure] 1. Plug in the AC power cord. a. USB storage device 2. Press [ ] button on the remote control unit to turn b. Remote Control Unit off (standby). 3. Check “STAND BY” indicator (Red LED) lighting. Firmware Update Procedure 4.
TROUBLESHOOTING FLOW CHART NO.1 The power cannot be turned on. See FLOW CHART No.2 <The fuse blows out.> Is the fuse (F701) normal? Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective. (C610, D609, D610, D611, D612, Q621, Q622, T601, T602) Is the INV+31V line voltage normal?
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FLOW CHART NO.5 AL+3.3V is not output. Is approximately 7V voltage supplied to the collector Check D525, C516 and their periphery circuit, and of Q521? service it if defective. Is approximately 4V voltage supplied to the base Check D552 and their periphery circuit, and of Q521? service it if defective.
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FLOW CHART NO.9 LCD-5.5V is not output. Replace Q509. FLOW CHART NO.10 AL+5.5V is not output. Check if there is any leak or short-circuit on the loaded circuit, and service it if defective. FLOW CHART NO.11 P-ON+3.3V is not output. Replace Q510.
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FLOW CHART NO.13 AL+5.5V is not output. Check if there is any leak or short-circuit on the loaded circuit, and service it if defective. FLOW CHART NO.14 P-ON+3.3V is not output. Replace Q510. FLOW CHART NO.15 P-ON+9V is not output. Is approximately 10V voltage supplied to the base of Q517? Replace Q517.
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FLOW CHART NO.17 Picture does not appear normally. Check the line between Pin(16, 18) of CN403 and Are the DIF signals outputted to Pin(16, 18) of CN403? Pin(4, 5) of TU1, and TU1(Tuner Unit), and service it if defective. Replace Digital Main CBA Unit or LCD Module Assembly.
SCHEMATIC DIAGRAMS / CBA AND TEST POINTS Standard Notes WARNING Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.
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LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F701) is blown, first check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.
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Power Supply 1 Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. 10-3 A0CA2SCP1...
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Power Supply 2 Schematic Diagram 10-4 A0CA2SCP2...
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Power Supply 3 Schematic Diagram 10-5 A0CA2SCP3...
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Power SW Schematic Diagram CAUTION ! CAUTION ! NOTE: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using For continued protection against fire hazard, If Main Fuse (F701) is blown , check to see that all components in the power supply replace only with the same type fuse.
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Function Schematic Diagram 10-8 A0CA2SCF...
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Digital Main 1 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/7) ~ IC3301 (7/7) in this Digital Main Schematic Diagram Section. 10-9 A0CA2SCD1...
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Digital Main 2 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/7) ~ IC3301 (7/7) in this Digital Main Schematic Diagram Section. 10-10 A0CA2SCD2...
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Digital Main 3 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/7) ~ IC3301 (7/7) in this Digital Main Schematic Diagram Section. 10-11 A0CA2SCD3...
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Digital Main 4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/7) ~ IC3301 (7/7) in this Digital Main Schematic Diagram Section. 10-12 A0CA2SCD4...
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Digital Main 5 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/7) ~ IC3301 (7/7) in this Digital Main Schematic Diagram Section. 10-13 A0CA2SCD5...
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Digital Main 6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/7) ~ IC3301 (7/7) in this Digital Main Schematic Diagram Section. 10-14 A0CA2SCD6...
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Digital Main 7 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/7) ~ IC3301 (7/7) in this Digital Main Schematic Diagram Section. 10-15 A0CA2SCD7...
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Power Supply CBA Top View Because a hot chassis ground is present in the power supply NOTE: circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input slowly, hot GND as a common terminal.
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Power Supply CBA Bottom View Because a hot chassis ground is present in the power supply NOTE: circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input slowly, hot GND as a common terminal.
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Inverter CBA, Function CBA & Power SW CBA Top View Because a hot chassis ground is present in the power supply CAUTION ! CAUTION ! circuit, an isolation transformer must be used when repairing. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. For continued protection against fire hazard, Also, in order to have the ability to increase the input slowly, If Main Fuse (F701) is blown , check to see that all components in the power supply...
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Inverter CBA, Function CBA & Power SW CBA Bottom View Because a hot chassis ground is present in the power supply CAUTION ! CAUTION ! circuit, an isolation transformer must be used when repairing. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. For continued protection against fire hazard, Also, in order to have the ability to increase the input slowly, If Main Fuse (F701) is blown , check to see that all components in the power supply...
WAVEFORMS WF1 ~ WF6 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 2 of CN404 Pin 4 of CN404 VIDEO-Y VIDEO-Y 0.2V 0.2V 20µs 20µs VIDEO VIDEO 0.2V...
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WF7 ~ WF10 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 22 of CN401 Pin 26 of CN404 WF10 AUDIO(L) AUDIO(L) 0.5V 0.5V 0.5m 0.5ms VIDEO-R VIDEO-R 0.5V...
EXPLODED VIEWS Cabinet Digital Main CBA Unit CL402 CL403 CL404 CL802 CL401 CL3901 CL406 SP802 CL801 Function CBA LCD1 SP801 Power Supply CBA Power SW CBA Inverter CBA Stand Assembly See Electrical Parts List for parts with this mark. 13-1 A0CA0CEX...
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Packing Some Ref. Numbers are not in sequence. X2-1 X2-2 Stand Assembly Tape Tape Packing Tape Packing Tape 13-2 A0CA0PEX...
MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. RATING LABEL A0CA2EP ---------- Before replacing any of these components, read SCREW P-TIGHT M4X14 BIND HEAD+BLK GBHP4140 carefully the product safety notice in this service SCREW P-TIGHT 3X10 BIND HEAD+ GBHP3100 manual.
ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. C208 CHIP CERAMIC CAP .(1608) CH J 33pF/50V or CHD1JJ3CH330 Before replacing any of these components, read CAP CHIP 1608 J/C0G/33pF/50V CHD330EYA030 carefully the product safety notice in this service C209...
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Ref. No. Description Part No. Ref. No. Description Part No. CAP ELE 47µF/25V/M/85 CED470TEP001 POLYESTER FILM CAP . 0.1µF/100V J CMB104EUR001 C409 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V or CHD1JK30B104 C521 ELECTROLYTIC CAP . 100µF/10V M or CE1AMASDL101 CAP CHIP 1608 K/X7R/0.1µF/50V CHD104EYA032 CAP ELE 100µF/10V/M/85 or CEB101KSN001...
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Ref. No. Description Part No. Ref. No. Description Part No. C631 CAP CERAMIC (AX) 0.1µF/50V/F/Z CA1J104TU062 CAP CHIP 1608 K/X7R/0.001µF/50V CHD102EYA032 C801 CHIP CERAMIC CAP .(1608) B K 0.047µF/50V or CHD1JK30B473 C839 CHIP CERAMIC CAP .(1608) B K 1000pF/50V or CHD1JK30B102 CAP CHIP 1608 K/X7R/0.047µF/50V CHD473EYA032 CAP CHIP 1608 K/X7R/0.001µF/50V...
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Ref. No. Description Part No. Ref. No. Description Part No. D210 DIODE ZENER 3V9BSB-T26 or NDTB3R9BST26 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE ZENER HZS3.9NB2TE-EQ QDTB0HZS3R9N D502 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D211 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 WIRE COPPER JP0.6MM XZ40C0AKM001...
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Ref. No. Description Part No. Ref. No. Description Part No. DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D639 DIODE ZENER 5V6BSB-T26 or NDTB5R6BST26 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE ZENER HZS5.6NB2TE-EQ QDTB0HZS5R6N D536 DIODE ZENER 16BSB-T26 or NDTB016BST26 D801 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE ZENER HZS16NB2TE-EQ QDTBHZS16NB2...
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Ref. No. Description Part No. Ref. No. Description Part No. PNP TRANSISTOR 2SA1980MG-AT NQSG2SA1980M PNP TRANSISTOR 2SA1980M Y or NQSY2SA1980M Q182 TRANSISTOR KTA1267-GR-AT/P or NQS1KTA1267P PNP TRANSISTOR 2SA1980MG-AT NQSG2SA1980M TRANSISTOR KTA-1266-GR-AT/P or NQS4KTA1266P Q505 TRANSISTOR KTC3198-Y-AT/P or NQSYKTC3198P TRANSISTOR 2SA1015-Y(TE2 F T) or QQSY2SA1015F TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P...
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Ref. No. Description Part No. Ref. No. Description Part No. NPN TRANSISTOR 2SC5343M Y NQSY2SC5343M TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F Q514 TRANSISTOR KTC3198-Y -AT/P or NQSYKTC3198P NPN TRANSISTOR 2SC5343Y -AT or NQSY02SC5343 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343 TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P...
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Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 47k Ω RES CARBON FILM 1/4W J 56 Ω RRXA473YF002 RCJ560PAK001 CHIP RES. 1/10W J 15k Ω or RES CARBON FILM 1/4W J 56 Ω or R230 RRXAJR5Z0153 R342...
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Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 3.3k Ω or RES CARBON FILM 1/4W J 270 Ω or R515 RRXAJR5Z0332 R547 RCX4271FS002 RES CHIP 1608 1/10W J 3.3k Ω RES CARBON FILM T 1/4W J 270 Ω or RRXA332YF002 RCX4271T1001 RES CARBON FILM 1/4W J 1.8k Ω...
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Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM 1/4W J 10 Ω or RES CARBON FILM 1/4W J 10k Ω R590 RCX4100FS002 RCJ103PAK001 RES CARBON FILM T 1/4W J 10 Ω or RES CARBON FILM 1/4W J 1.2k Ω or RCX4100T1001 R650 RCX4122FS002...
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Ref. No. Description Part No. Ref. No. Description Part No. BC181 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002 JK207 JACK RCA PCB S(ORANGE) 01 MTJ-032-04B- JXRJ010LY029 76 FE or WIRE COPPER JP0.6MM XZ40C0AKM001 JACK RCA PCB S ORANGE 01/RCA-101H(OR) JXRJ010YUQ06 BC182 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002 WIRE COPPER JP0.6MM XZ40C0AKM001...
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Ref. No. Description Part No. Ref. No. Description Part No. CAP ELE 100µF/35V/M/85 CEE101TEP001 CERAMIC CAP .(AX) B K 1000pF/50V CCA1JKT0B102 C1003 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V or CHD1JK30B104 C1209 CAP CERAMIC HV 10pF/6.3KV/SL/J or CCA1000MR001 CAP CHIP 1608 K/X7R/0.1µF/50V CHD104EYA032 CAP CERAMIC HV 10pF/6.3KV/SL/J or CCC1000MR007...
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Ref. No. Description Part No. Ref. No. Description Part No. DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F D1214 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148...
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Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 4.7k Ω or CHIP RES.(1608) 1/10W F 27k Ω or R1012 RRXAJR5Z0472 RRXAFR5Z2702 RES CHIP 1608 1/10W J 4.7k Ω RES CHIP 1608 1/10W F 27.0k Ω RRXA472YF002 RTW2702YF002 CHIP RES.
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Ref. No. Description Part No. Ref. No. Description Part No. T1201! TRANS INVERTER HVT-266 LTZ3PZ0XB015 SW105 TACT SWITCH SKHHLMA010 or SST0101AL049 T1202! TRANS INVERTER HVT-266 LTZ3PZ0XB015 TACT SWITCH KSMC632A SST0101HH025 T1203! TRANS INVERTER HVT-266 LTZ3PZ0XB015 SW106 TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A SST0101HH025...
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Ref. No. Description Part No. WIRE COPPER JP0.6MM XZ40C0AKM001 JS709 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002 WIRE COPPER JP0.6MM XZ40C0AKM001 TM701 EYELET TYPE D-1 0VM406868 TM702 EYELET TYPE D-1 0VM406868 Ref. No. Description Part No. TUNER UNIT DTOS40AML201A UTNPSG0SM002 20100716 15-16 A0CA2EL...
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