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This Service Manual is for the LH850-M22 (A0C72EP) / LH851-M22 (A0C73EP) model. For the LH850-M22 (A0C72EP) / LH851-M22 (A0C73EP) model, the letter (A0C72EP) / (A0C73EP) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label below.
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.
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[13] Front Cabinet [9] Digital Main CBA Unit [7] Jack (S-13) [8] Shield Holder (S-11) (S-13) (S-10) [11] Speaker (H-1) Speaker Holder (S-12) (S-16) (S-17) (S-8) [12] Function CBA [11] Speaker (S-16) (S-9) [6] Jack CBA [5] HP Jack Speaker Holder Holder (S-6)
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TV Cable Wiring Diagram To LCD Module Assembly Digital Main CBA Unit Main CBA CN3901 CN301 CN1550 CN402 CN3701 CN403 CN3703 CN1650 CN404 CN3702 CN401 CN3704 CN1750 CN103 CN801 CN102A AC CORD Jack CBA CN802 CN452 To Speaker To Speaker Function CBA CN101B Fig.
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 (F601) normal? Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective. (IC605, Q601, Q602, D602, D604, D605, D607, T601, R602) Is approximately 32V voltage supplied to the cathode...
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FLOW CHART NO.5 AL+3.3V is not output. Is approximately 5V voltage supplied to the collector Check D637, C628 and their periphery circuit, and of Q605? service it if defective. Is approximately 4V voltage supplied to the base Check D634 and their periphery circuit, and of Q605? service it if defective.
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FLOW CHART NO.9 PANEL+25.6V is not output. Is approximately 32V voltage supplied to the cathode of D618? Is approximately 32V voltage outputted to the collector of Q612? Check D617, D636 and their periphery circuit, and service it if defective. FLOW CHART NO.10 PANEL+12.5V is not output.
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FLOW CHART NO.12 AL+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.13 P-ON+3.3V is not output. Replace Q606. FLOW CHART NO.14 P-ON+11V is not output. Is approximately 12V voltage supplied to the base of Q609? Replace Q609.
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FLOW CHART NO.16 No operation is possible from the remote control unit. Check AL+3.3V line and service it if defective. Replace the RS101 (remote control receiver) or remote control unit. Check the line between Pin(1) of RS101 (remote control receiver) and Pin(13) of CN403, and service it if defective.
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FLOW CHART NO.18 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 TU10, and TU10(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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Main 1 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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Main 2 Schematic Diagram 10-4 A0C72SCM2...
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Main 3 Schematic Diagram 10-5 A0C72SCM3...
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Main 4 Schematic Diagram 10-6 A0C72SCM4...
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Function Schematic Diagram 10-7 A0C72SCF...
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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 A0C72SCD1...
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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 A0C72SCD2...
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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 A0C72SCD3...
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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 A0C72SCD4...
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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 A0C72SCD5...
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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 A0C72SCD6...
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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 A0C72SCD7...
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Main 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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Main 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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Jack CBA & Function CBA Top View Function CBA Not Used Jack CBA 10-18 BA0C70F01021...
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Jack CBA & Function CBA Bottom View Not Used Function CBA Jack CBA 10-19 BA0C70F01021...
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 CL302 CL303 X3301 CL404 CL3901 CL401 CL301 SP802 CL103 Jack CBA CL802 SP801 Function CBA CL801 LCD1 See Electrical Parts List for parts with this mark. Main CBA AC601 Stand Assembly 13-1 A0C72_73CEX...
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Packing X2-1 Stand X2-2 Assembly Tape Tape Packing Tape Packing Tape Some Ref. Numbers are not in sequence. Packing Tape 13-2 A0C70_71PEX...
(---------) are not available. ACCESSORIES REMOTE CONTROL NH201RD NH201RD Comparison Chart of Models and Marks REMOTE CONTROL NH203RD NH203RD Model Mark LH850-M22 LH851-M22 Ref. No. Mark Description Part No. RATING LABEL A0C72EP ---------- RATING LABEL A0C73EP ---------- Ref. No. Mark Description Part No.
CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104 Comparison Chart of Models and Marks C314 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104 Model Mark LH850-M22 C315 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104 LH851-M22 C316 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CAP CHIP 1608 J/C0G/33pF/50V CHD330EYA030 ELECTROLYTIC CAP . 1000µF/25V M or CE1EMZNDL102 C430 ELECTROLYTIC CAP . 100µF/16V M or CE1CMASDL101 CAP ELE 1000µF/25V/M/85 or CED102KSN002 CAP ELE 100µF/16V/M/85 or CEC101KSN001 CAP ELE 1000µF/25V/M/85 CED102TEP002...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CAP CHIP 1608 Z/Y5V/0.1µF/50V CHD104EYA036 CAP CHIP 1608 Z/Y5V/0.1µF/50V CHD104EYA036 C644 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1JZ30F104 C1005 CHIP CERAMIC CAP .(1608) B K 0.1µF/ CHD1JK30B104 50V or 50V or CAP CHIP 1608 Z/Y5V/0.1µF/50V...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C1552 CAP CERAMIC (AX) 1500pF/50V/B/K CA1J152TU061 CONNECTOR PRINT MES 00 6232 011 JC62G11UG026 006 800+ or C1553 CAP CERAMIC HV 15pF/6.3KV/SL/J or CCA1500MR001 CONNECTOR PRINT MES 11 S 1.0-11- JC1111JSH001 CAP CERAMIC HV 15pF/6.3KV/SL/J or CCC1500MR007...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D631! SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D509 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. D801 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D1556 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D802 SWITCHING DIODE 1SS133(T-77) or...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. D1752 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F NPN TRANSISTOR 2SC5343Y-AT or NQSY02SC5343 D1753 SWITCHING DIODE 1SS133(T-77) or...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. TRANSISTOR 2SA1015-Y(TE2 F T) or QQSY2SA1015F TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P TRANSISTOR 2SA1015-GR(TE2 F T) or QQS12SA1015F TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F PNP TRANSISTOR 2SA1980Y-AT or NQSY02SA1980 TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F PNP TRANSISTOR 2SA1980 G or NQSG02SA1980...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F NPN TRANSISTOR SMD QQ1R2SC4081U 2SC4081UBTLR or NPN TRANSISTOR 2SC5343Y-AT or NQSY02SC5343 TRANSISTOR KTC4075-GR-RTK/P or NQ14KTC4075P NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343 NPN TRANSISTORS 2SC4154-T111-1E QQ1E02SC4154 NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W 0 Ω or Q1601 TRANSISTOR KTA1267-GR-AT/P or NQS1KTA1267P R307 RRXAZR5Z0000 RES CHIP 1608 1/10W J 0 Ω TRANSISTOR KTA-1266-GR-AT/P or NQS4KTA1266P RRXA000YF002 RES CARBON FILM T 1/4W J 10 Ω or TRANSISTOR 2SA1015-Y(TE2 F T) or QQSY2SA1015F R308...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RES CHIP 1608 1/10W J 0 Ω R447 WIRE CP STP-S-0.50 or XZ40F0REN001 RRXA000YF002 GLASS GLAZE RES. 1/2W J 3.3M Ω or WIRE CP STP-S-0.60 or XZ40F0REN002 R601! RXX2JZLZ0335 RES.
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RES CARBON FILM 1/4W J 68 Ω or CHIP RES.(1608) 1/10W F 2.7k Ω or RCX4680FS002 RRXAFR5Z2701 RES CARBON FILM 1/4W J 68 Ω RES CHIP 1608 1/10W F 2.70k Ω RCJ680PAK001 RTW2701YF002 RES CARBON FILM T 1/4W J 2.7k Ω...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RES CARBON FILM T 1/4W J 150 Ω or CHIP RES. 1/10W F 75k Ω or R698 RCX4151T1001 RRXAFR5Z0753 RES CARBON FILM 1/4W J 150 Ω or RES CHIP 1608 1/10W F 75.0k Ω RCX4151FS002 RTW7502YF002 RES CARBON FILM 1/4W J 150 Ω...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RES CHIP 1608 1/10W J 10 Ω WIRE CP STP-S-0.60 or XZ40F0REN002 RRXA100YF002 CHIP RES. 1/10W J 12k Ω or WIRE CP 6113-05603-0220 or XZ40F0SHG001 R1502 RRXAJR5Z0123 RES CHIP 1608 1/10W J 12k Ω WIRE CP CP0.56 XZ40F0XRC001 RRXA123YF002...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. SWITCH JK405 JACK SW RCA PCB S RED RCA- JYRJ010YUQ03 102H(RD) or SW601 SWITCH POWER AJ7222BF SPEVBA0MS001 JACK SW RCA PCB S(RED) 01 MTJ-032- JYRJ010LY031 MISCELLANEOUS 04A-75 FE AC601! A AC CORD W/O A GND WIRE CEE/ WAE1720LW001...
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FUNCTION CBA Ref. No. Description Part No. RESISTORS Ref. No. Description Part No. RES CARBON FILM T 1/4W J 470 Ω or R402 RCX4471T1001 FUNCTION CBA ---------- RES CARBON FILM 1/4W J 470 Ω or RCX4471FS002 Consists of the following: RES CARBON FILM 1/4W J 470 Ω...
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Ref. No. Description Part No. TACT SWITCH KSMC632A SST0101HH025 SW102 TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A SST0101HH025 SW103 TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A SST0101HH025 SW104 TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A SST0101HH025 SW105 TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A...
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