SERVICE MANUAL This Service Manual is for the LT850-M32 (A0CF3PH) model. For the LT850-M32 (A0CF3PH) model, the letter (A0CF3PH) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label below. Serial No. Label "A0CF3PH"...
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.
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 Step/ Fig. Loc. Part Removal Note This flowchart indicates the disassembly steps for the cabinet parts, and the CBA in order to gain access to Digital Main item(s) to be serviced. When reassembling, follow the --------------- CBA Unit 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.
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 (F601) normal? Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective. (IC607, Q601, Q602, D609, D610, D611, D612, T601, T602, R601) Is 32V voltage supplied to the cathode of D514?
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FLOW CHART NO.5 INV+16V is not output. Check D504, D505, C503 and their periphery circuit, and service it defective. Check Q504, Q505, D506, D507, P-ON-H1 line and their periphery circuit, and service it defective. FLOW CHART NO.6 AL+3.3V is not output. Is approximately 6V voltage supplied to the collector Check D525, C516 and their periphery circuit, and of Q521?
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FLOW CHART NO.8 LCD+24V is not output. Is approximately 32V voltage supplied to the cathode of D514? Is approximately 32V voltage outputted to the collector of Q504? Is approximately 24V voltage supplied to the emitter of Q405? Check Q404, Q405 and their periphery circuit, and service it if defective.
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FLOW CHART NO.11 The key operation is not functioning. Re-install the switches (SW101, SW103-SW107) correctly or replace the poor switch. Check the switches (SW101, SW103-SW107) and their periphery, and service it if defective. Replace Digital Main CBA Unit. FLOW CHART NO.12 No operation is possible from the remote control unit.
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FLOW CHART NO.14 No operation is possible from the remote control unit. Check AL+3.3V line and service it if defective. Replace the RS102 (remote control receiver) or remote control unit. Check the line between Pin(1) of RS102 (remote control receiver) and Pin(13) of CN403, and service it if defective.
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FLOW CHART NO.16 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 (F601) 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 & Power SW Schematic Diagram CAUTION ! NOTE: CAUTION ! 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 (F601) is blown , check to see that all components in the power supply hot GND as a common terminal.
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Power Supply 2 Schematic Diagram 10-4 A0CF3SCP2...
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Power Supply 3 Schematic Diagram 10-5 A0CF3SCP3...
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Inverter Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. 10-6 A0CF3INV...
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Function & IR Sensor Schematic Diagram 10-7 A0CF3SCF...
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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. 10-8 A0CF3SCD1...
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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. 10-9 A0CF3SCD2...
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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. 10-10 A0CF3SCD3...
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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. 10-11 A0CF3SCD4...
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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. 10-12 A0CF3SCD5...
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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. 10-13 A0CF3SCD6...
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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. 10-14 A0CF3SCD7...
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Power Supply CBA Top View Because a hot chassis ground is present in the power supply NOTE: CAUTION ! circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. 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: CAUTION ! circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. 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, IR Sensor CBA & Power SW CBA Top View NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. Function CBA Power SW CBA IR Sensor CBA Not use Inverter CBA 10-17 BA0CF0F01021...
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Inverter CBA, Function CBA, IR Sensor CBA & Power SW CBA Bottom View NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. Function CBA Not use IR Sensor CBA Power SW CBA Inverter CBA 10-18 BA0CF0F01021...
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 Inverter CBA CL802 CL600 SP802 Function CBA CL103A IR Sensor CBA CL801 Power SW CBA CL1003 SP801 AC701 LCD1 Power Supply CBA CL3901 See Electrical Parts List CL401 for parts with this mark. CL404 CL403 Stand Assembly CL402 Digital Main CBA Unit X3301...
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Packing Stand Assembly Some Ref. Numbers are not in sequence. Tape Packing Tape Tape Packing Tape 13-2 A0CF3PEX...
MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. SET BAG (900X850) A8AFFUH 1EM324904A Before replacing any of these components, read SERIAL NO. LABEL L9750UA ---------- carefully the product safety notice in this service STAND BAG A94F0UH 1EM428757 manual.
ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. C207 CHIP CERAMIC CAP . CH J 330pF/50V or CHD1JJ3CH331 Before replacing any of these components, read CAP CHIP 1608 J/C0G/330pF/50V CHD331EYA030 carefully the product safety notice in this service C212...
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Ref. No. Description Part No. Ref. No. Description Part No. C405 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V or CHD1JZ30F104 C517 ELECTROLYTIC CAP . 1000µF/10V M or CE1AMASDL102 CAP CHIP 1608 Z/Y5V/0.1µF/50V CHD104EYA036 CAP ELE 1000µF/10V/M/85 or CEB102KSN001 C406 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V or CHD1JZ30F104 CAP ELE 1000µF/10V/M/85 CEB102TEP001...
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Ref. No. Description Part No. Ref. No. Description Part No. CAP POLYESTER 0.0027µF/50V/5%/POLY CA1J272DT026 C841 CHIP CERAMIC CAP .(1608) B K 1000pF/50V CHD1JK30B102 C801 CHIP CERAMIC CAP .(1608) B K 0.047µF/50V or CHD1JK30B473 CONNECTORS CAP CHIP 1608 K/X7R/0.047µF/50V CHD473EYA032 CN101 PH CONNECTOR TOP 6P B6B-PH-K-S J3PHC06JG029 (LF)(SN) or...
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Ref. No. Description Part No. Ref. No. Description Part No. DIODE ZENER HZS5.6NB2TE-EQ QDTB0HZS5R6N DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D308 DIODE ZENER 5V6BSB-T26 or NDTB5R6BST26 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE ZENER HZS5.6NB2TE-EQ QDTB0HZS5R6N D511 SCHOTTKY BARRIER DIODE SB340 NDWZ000SB340 D309 DIODE ZENER 5V6BSB-T26 or NDTB5R6BST26 D512...
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Ref. No. Description Part No. Ref. No. Description Part No. DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 L303 INDUCTOR 12µH-J-26T LLAXJATTU120 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F L304 INDUCTOR 12µH-J-26T LLAXJATTU120 D546 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 L601! LINE FILTER MS036 or LLBG00ZY2009 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 LINE FILTER JLB2808 or LLBG00ZXB004...
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Ref. No. Description Part No. Ref. No. Description Part No. NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M NPN TRANSISTOR 2SC5343Y -AT or NQSY02SC5343 NPN TRANSISTOR 2SC5343M Y NQSY2SC5343M NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343 Q403 TRANSISTOR 2SA1020-Y(TE6 F M) or QQSY2SA1020F NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M TRANSISTOR KTA1281-Y-AT/P NQVYKTA1281P...
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Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 0 Ω or PNP TRANSISTOR 2SA1980M Y or NQSY2SA1980M RRXA000YF002 RES CHIP 1608 1/10W 0 Ω PNP TRANSISTOR 2SA1980MG-AT NQSG2SA1980M RRJ000WAL002 CHIP RES.(1608) 1/10W 0 Ω or Q521 TRANSISTOR 2SC2120-Y(TE2 F T) or QQSY2SC2120F...
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Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 47k Ω CHIP RES.(1608) 1/10W 0 Ω or RRJ473WAL002 R334 RRXAZR5Z0000 CHIP RES.(1608) 1/10W 0 Ω or RES CHIP 1608 1/10W J 0 Ω or R309 RRXAZR5Z0000 RRXA000YF002...
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Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 10k Ω or METAL OXIDE FILM RES. 1W J 0.68 Ω or RRXA103YF002 R535 RN01R68ZU001 RES CHIP 1608 1/10W J 10k Ω METALOXIDE RES 1W J 0.68 Ω RRJ103WAL002 RNJR68PAK001 RES CARBON FILM 1/4W J 3.3 Ω...
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Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 100k Ω or GLASS GLAZE RES. 1/2W J 1.5M Ω or R567 RRXAJR5Z0104 R617! RXX2JZLZ0155 RES CHIP 1608 1/10W J 100k Ω or RES. CARBON FILM J 1/2W J 1.5M Ω RRXA104YF002 RCX2155T1003 RES CHIP 1608 1/10W J 100k Ω...
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Ref. No. Description Part No. Ref. No. Description Part No. C1052 ELECTROLYTIC CAP 100µF/100V or CE2AMZNDL101 C1215 CAP CERAMIC HV 15pF/6.3KV/SL/J or CCA1500MR001 ELECTROLYTIC CAP 100µF/100V or CE2AMZPDL101 CAP CERAMIC HV 15pF/6.3KV/SL/J or CCC1500MR007 CAP ELE 100µF/100V/M/85 or CEH101TEP002 CAP CERAMIC HV 15pF/6KV/SL/J CCK1500TE009 CAP ELE 100µF/100V/M/85 CEH101KSN002...
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Ref. No. Description Part No. Ref. No. Description Part No. CONNECTOR PRINT MES 11 S 1.0-11-11P JC1111JSH001 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 CN1050! CONNECTOR/JACK 1747386-1 JB17J02AP002 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F CN1100! CONNECTOR/JACK 1747386-1 JB17J02AP002 D1115 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 CN1150! CONNECTOR/JACK 1747386-1 JB17J02AP002 DIODE SWITCHING HSS4148TE-E or...
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Ref. No. Description Part No. Ref. No. Description Part No. DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F D1215 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 NPN TRANSISTOR 2SC5343Y -AT or NQSY02SC5343 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F...
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Ref. No. Description Part No. Ref. No. Description Part No. PNP TRANSISTOR 2SA1981 or NQS002SA1981 NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M PNP TRANSISTOR 2SA1981Y-AT NQSY02SA1981 NPN TRANSISTOR 2SC5343M Y NQSY2SC5343M Q1503 TRANSISTOR KTC3198-Y -AT/P or NQSYKTC3198P Q1803 TRANSISTOR KTC3198-Y-AT/P or NQSYKTC3198P TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P TRANSISTOR KTC3199-GR-AT/P or...
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Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W F 1.00k Ω RES CHIP 1608 1/10W J 22k Ω or RTW1001YF002 RRXA223YF002 CHIP RES. 1/10W J 100k Ω or RES CHIP 1608 1/10W J 22k Ω R1003 RRXAJR5Z0104 RRJ223WAL002...
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Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 1k Ω or RES CHIP 1608 1/10W J 1.0k Ω or R1118 RRXAJR5Z0102 RRXA102YF002 RES CHIP 1608 1/10W J 1.0k Ω or RES CHIP 1608 1/10W J 1.0k Ω RRXA102YF002 RRJ102WAL002 RES CHIP 1608 1/10W J 1.0k Ω...
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Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM 1/4W J 4.7k Ω RES CARBON FILM 1/4W J 5.6k Ω RCJ472PAK001 RCJ562PAK001 RES CARBON FILM 1/4W J 100k Ω or RES CARBON FILM 1/4W J 5.6k Ω or R1811 RCX4104FS002 R1969...
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Ref. No. Description Part No. Ref. No. Description Part No. BEAD INDUCTOR B29 RID 2.3X7.5X7.5T LLEF0S0XM002 TACT SWITCH KSMC632A SST0101HH025 BC1930 BEADS INDUCTOR FBR07HA121SB-00 or LLBF00STU030 IR SENSOR CBA BEAD INDUCTOR B29 RID 2.3X7.5X7.5T LLEF0S0XM002 BC1931 BEADS INDUCTOR FBR07HA121SB-00 or LLBF00STU030 Ref.
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