FUNAI LT850-M22 - SERVICE Service Manual
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FUNAI LT850-M22 - SERVICE, 7-1 LC8.5FW FIRMWARE RENEWAL MODE Equipment Required a. USB storage device b. Remote Control Unit Firmware Update Procedure [Check the current version] 1. Press [MENU] button on the remote control unit to display the menu mode. 2. Press [ÅK] or [ÅL] to select “OTHERS”, then press [OK] button. 3. Press [ÅK] or [ÅL] to select “Software”, then press [OK] button. The current FW version will be displayed. [Preparation] 1. Prepare USB storage device. 2. Copy F/W-file (ecc file) to USB storage device. Note: Make sure to use the blank USB Storage. 3. Rename the F/W-file’s name. Step1. Add the “_F” at the
FUNAI LT850-M22 - SERVICE, 3-2 TVP_SN With Soldering Iron: 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3) 2. Lift each lead of the flat pack-IC upward one by one, using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4) 3. Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) 4. Relea
10-15 A0C70SCD7 Digital Main 7 Schematic Diagram 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. 1 NOTE:
10-14 A0C70SCD6 Digital Main 6 Schematic Diagram 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. 1 NOTE:
FUNAI LT850-M22 - SERVICE, 9-2 Video Block Diagram A0C70BLV JK403 VIDEO-IN CN404 CN3702 CN401 CN3704 JK413 15 11 7 VIDEO-B VIDEO-G VIDEO-R 19 20 RGB- VIDEO-IN VIDEO-OUT VIDEO SIGNAL MAIN CBA VIDEO-IN22 VIDEO-OUT24 24 VIDEO-R26 26 VIDEO-G28 28 VIDEO-B29 29 RGB-VIDEO-IN22 22 S-VIDEO-C-IN29 29 S-VIDEO-Y-IN27 27 COM-VIDEO-Y-IN 44 COM-VIDEO-Pb-IN 66 COM-VIDEO-Pr-IN 88 VIDEO-OUT 15 BUFFER Q10 TU-CVBS29 29 S-SW11 TU-CVBS TU10 DIF-OUT2 4 DIF-OUT1 5 (TUNER UNIT) IF-AGC 6 CN403 CN3703 DIF-OUT216 16 IF-AGC20 20 DIF-OUT118 18 VIDEO-IN RGB-VIDEO-IN VIDEO-OUT VIDEO-R VIDEO-G VIDEO-B TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM S-VIDEO-Y-IN S-VIDEO-C-IN COM-VIDEO-Y-IN COM-VIDEO-Pb-IN COM-VIDEO-Pr-IN DIF-OUT2 DIF-OUT
FUNAI LT850-M22 - SERVICE, 20100507 15-6 A0C70/71EL DIODE ZENER HZS15NB2TE-EQ QDTBHZS15NB2 D815 DIODE ZENER 8V2BSB-T26 or NDTB8R2BST26 DIODE ZENER HZS8.2NB2TE-EQ QDTB0HZS8R2N D1003 WIRE CP STP-S-0.50 or XZ40F0REN001 WIRE CP STP-S-0.60 or XZ40F0REN002 WIRE CP 6113-05603-0220 or XZ40F0SHG001 WIRE CP CP0.56 XZ40F0XRC001 D1004 WIRE CP STP-S-0.50 or XZ40F0REN001 WIRE CP STP-S-0.60 or XZ40F0REN002 WIRE CP 6113-05603-0220 or XZ40F0SHG001 WIRE CP CP0.56 XZ40F0XRC001 D1005 DIODE ZENER 15BSB-T26 or NDTB015BST26 DIODE ZENER HZS15NB2TE-EQ QDTBHZS15NB2 D1007 WIRE C
FUNAI LT850-M22 - SERVICE, 10-13 A0C70SCD5 Digital Main 5 Schematic Diagram 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. 1 NOTE:
FUNAI LT850-M22 - SERVICE, 8-3 A0CN0TR PANEL+12.5V is not output. FLOW CHART NO.10 Is approximately 15V voltage supplied to the cathode of D612? No Ye s Ye s Check D612, D620, C613 and their per iphery circuit, and service it if defec tive. Check D613, C618 and their periphery circuit, and service it if defective. Check D640, R657, R658 and their periphery circuit, and service it if defective. No Ye s Replace Q611. Replace Q615. No LCD-5.5V is not output. FLOW CHART NO.11 Is approximately -10V voltage supplied to the anode of D613? Is approximately
9-4 A0C70BLD Digital Signal Process Block Diagram DIGITAL MAIN CBA UNIT IC3301 (DIGITAL SIGNAL PROCESS) VIDEO-OUT DIGITAL SIGNAL PROCESS D-SUB 3 12 15 1 2 RED GREEN BLUE DATA CLOCK JK3701 L2 P2 J2 A/D CONVERTER T1 14 13 HSYNC VSYNC U1 U2 AG8 AK5 V1 V2 AE1 AB3 AA2 AC3 AD1 AB4 AD4 AE3 AC4 AD2 AC1 AB1 AA3 W1 VIDEO-IN VIDEO-R VIDEO-G VIDEO-B TO VIDEO BLOCK DIAGRAM TO VI
FUNAI LT850-M22 - SERVICE, SERVICE MANUAL This Service Manual is for the LT850-M22 (A0C70EP) / LT851-M22 (A0C71EP) model. For the LT850-M22 (A0C70EP) / LT851-M22 (A0C71EP) model, the letter (A0C70EP) / (A0C71EP) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label below. Serial No. Label Serial No. Label "A0C70EP" "A0C71EP" 22″ COLOR LCD TELEVISION LT850-M22 / LT851-M22
FUNAI LT850-M22 - SERVICE, 20100507 15-13 A0C70/71EL R808 CHIP RES. 1/10W J 12k Ω or RRXAJR5Z0123 RES CHIP 1608 1/10W J 12k Ω RRXA123YF002 R809 CHIP RES. 1/10W J 560 Ω or RRXAJR5Z0561 RES CHIP 1608 1/10W J 560 Ω RRXA561YF002 R810 CHIP RES. 1/10W J 2.7k Ω or RRXAJR5Z0272 RES CHIP 1608 1/10W J 2.7k Ω RRXA272YF002 R811 CHIP RES. 1/10W J 560 Ω or RRXAJR5Z0561 RES CHIP 1608 1/10W J 560 Ω RRXA561YF002 R812 CHIP RES. 1/10W J 2.7k Ω or RRXAJR5Z0272 RES CHIP 1608 1/10W J 2.7k Ω RRXA272YF002 R813 CHIP RES. 1/10W J 4.7k Ω or RRXAJR5Z0472 RES CHIP
FUNAI LT850-M22 - SERVICE, 8-2 A0CN0TR P-ON+5V is not output. FLOW CHART NO.6 Ye s No Is approximately 6V voltage supplied to the base of Q616? AL+3.3V is not output. FLOW CHART NO.5 Ye s No Is approximately 5V voltage supplied to the collector of Q605? Check D637, C628 and their periphery circuit, and service it if defective. Check D637, C628 and their periphery circuit, and service it if defective. Check Q607, Q610, D653, P-ON-H2 line and their periphery circuit, and service it if defective. Ye s No Is approximately 4V voltage supplied to the base of Q605? Check D634 and their periphery circuit, and service it if defective. Repl
FUNAI LT850-M22 - SERVICE, 5-3 A0CN0EA The White Balance Adjustment should be performed when replacing the LCD Panel or Digital Main CBA. 3. White Balance Adjustment Purpose: To mix red, green and blue beams correctly for pure white. Symptom of Misadjustment: White becomes bluish or reddish. 1. Operate the unit for more than 20 minutes. 2. Input the White Raster(70%=70IRE, 40%=40IRE). 3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration a
8-4 A0CN0TR AL+5V is not output. FLOW CHART NO.12 Is approximately 5.5V voltage supplied to the cathode of D616? Check if there is any leak or short-circuit on the loaded circuit, and service it if defective. Ye s Check D616, C614 and their periphery circuit, and service it if defective. No P-ON+11V is not output. FLOW CHART NO.14 Ye s No Is approximately
FUNAI LT850-M22 - SERVICE, 1-2 A0C70_1SP < AUDIO > All items are measured across 16 Ω load at speaker output terminal. Note: Nominal specifications represent the design specifications. All units should be able to approximate these. Some will exceed and some may drop slightly below these specifications. Limit specifications represent the absolute worst condition that still might be considered acceptable. In no case should a unit fail to meet limit specifications. Description Condition Unit Nominal Limit 1. Audio Output Power 10% THD: Lch/Rch W 3.0/3.0 2.0/2.0 2. Audio Distortion 500mW: Lch/Rch % 1.5/1.5 3.0/3.0 3. Audio Freq. Response - 6dB: Lch - 6dB: Rch Hz Hz 70 to 10
FUNAI LT850-M22 - SERVICE, 2-2 LTVP_ISP 4. Hot Chassis Warning - a. Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord and maybe safety-serviced without an isolation transformer only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC power source. To confirm that the AC power plug is inserted correctly, with an AC voltmeter, measure between the chassis and a known earth ground. If a voltage reading in excess of 1.0 V is obtained, remove and reinsert the AC power plug in the opposite polarity and again measure the voltage potential betwe
FUNAI LT850-M22 - SERVICE, 20100507 15-8 A0C70/71EL Q610 TRANSISTOR KTA1267-GR-AT/P or NQS1KTA1267P TRANSISTOR KTA-1266-GR-AT/P or NQS4KTA1266P TRANSISTOR 2SA1015-Y(TE2 F T) or QQSY2SA1015F TRANSISTOR 2SA1015-GR(TE2 F T) or QQS12SA1015F PNP TRANSISTOR 2SA1980Y-AT or NQSY02SA1980 PNP TRANSISTOR 2SA1980 G or NQSG02SA1980 PNP TRANSISTOR 2SA1980M Y or NQSY2SA1980M PNP TRANSISTOR 2SA1980MG-AT NQSG2SA1980M Q611 TRANSISTOR KTC3198-Y-AT/P or NQSYKTC3198P TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F NPN TRANSISTOR 2SC5343Y-AT or NQSY02SC5343 NPN TRANSISTOR 2SC5343G-AT or NQSG02SC53
FUNAI LT850-M22 - SERVICE, 10-9 A0C70SCD1 Digital Main 1 Schematic Diagram 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. 1 NOTE:
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