Sylvania LC370Sl8 Service Manual

37'' color lcd television

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SERVICE MANUAL

This service manual shows only the differences between

the model LC370SL8 and the original model LC370SS8.

All other information is described in the service manual

of the model LC370SS8.

37" COLOR LCD TELEVISION

Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Schematic Diagrams / CBA's and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Different parts from the original model (LC370SS8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

LC370SL8

TABLE OF CONTENTS

SUPPLEMENT

Table of Contents

Summary of Contents for Sylvania LC370Sl8

Page 1 SUPPLEMENT SERVICE MANUAL This service manual shows only the differences between the model LC370SL8 and the original model LC370SS8. All other information is described in the service manual of the model LC370SS8. 37″ COLOR LCD TELEVISION LC370SL8 TABLE OF CONTENTS Block Diagrams .
Page 2 BLOCK DIAGRAMS Power Supply Block Diagram A71G1BLP...
Page 3 SCHEMATIC DIAGRAMS / CBA’S 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.
Page 4 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE_A,_V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V. 2.
Page 5 Power Supply 1/2 & Digital Sub Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. VOLTAGE CHART CN301 Pin No. Voltage 12.2 12.2 15.6 34.6 A71G1SCP1...
Page 6 Digital Main 5/9 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3015. IC3015 is divided into four and shown as IC3015 (1/4) ~ IC3015 (4/4) in this Digital Main Schematic Diagram Section. A71G1SCD5...
Page 7 Digital Sub CBA Top & Bottom View BA71F0F01061...
Page 8 WIRING DIAGRAM A71G1WI...
Page 9 Different parts from the original model (LC370SS8) Ref. No. Description Part No. METAL OXIDE FILM RES. 2W J 0.68 Ω RN02R68DP004 Ref. No. Description Part No. METAL OXIDE FILM RES. 2W J 0.68 Ω RN02R68DP004 MECHANICAL PARTS METAL OXIDE FILM RES. 2W J 0.68 Ω RN02R68DP004 FRONT CABINET 37V A71G1UH 1EM021806...
Page 10 Misuse of any trademarks or any other content in this manual is strictly prohibited. Funai shall aggressively enforce its intellectual property rights to the fullest extent of the law. LC370SL8 A71G1UH 2007-08-06...
Page 11 SERVICE MANUAL 37″ COLOR LCD TELEVISION LC370SS8...
Page 12: Table Of Contents
IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Funai and described in this service manual are effective methods of performing service operations. Some of these service special tools should be used when and as recommended.
Page 13: Specifications
SPECIFICATIONS < TUNER / NTSC > ANT. Input ---------------------- 75 ohm Unbal., F type Description Condition Unit Nominal Limit 1. AFT Pull In Range ±2.3 ±2.1 ch.4 dBµ 2. Syncronizing Sens. ch.10 dBµ ch.41 dBµ < TUNER / ATSC > Description Condition Unit...
Page 14 < AUDIO > All items are measured across 8 Ω load at speaker output terminal with L.P.F. / Video1 Input. Description Condition Unit Nominal Limit 1. Audio Output Power 10% THD: Lch/Rch 10.0/10.0 9.0/9.0 2. Audio Distortion 500mW: Lch/Rch 0.5/0.5 2.0/2.0 -6dB: Lch 3.
Page 15: Important Safety Precautions
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.
Page 16 3. Design Alteration Warning - Do not alter or add 7. Product Safety Notice - Some electrical and to the mechanical or electrical design of this TV mechanical parts have special safety-related receiver. Design alterations and additions, characteristics which are often not evident from including, but not limited to circuit modifications visual inspection, nor can the protection they give and the addition of items such as auxiliary audio...
Page 17 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.
Page 18 Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. 1.
Page 19: Standard Notes For Servicing
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: Top View Bottom View 1.
Page 20 3. The flat pack-IC on the CBA is affixed with glue, so With Soldering Iron: be careful not to break or damage the foil of each 1. Using desoldering braid, remove the solder from pin or the solder lands under the IC when all pins of the flat pack-IC.
Page 21 2. Installation 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 the foil of each pin of the flat pack-IC on the CBA flux which is applied to all pins of the flat pack-IC, so you can install a replacement flat pack-IC more you can remove it easily.
Page 22 Instructions for Handling Semi- conductors Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1 MΩ) that is properly grounded to remove any static electricity that may be charged on the body.
Page 23: Cabinet Disassembly Instructions
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.
Page 24 [4] Rear Cabinet (S-4) (S-4) (S-5) (S-4) (S-6) (S-5) (S-4) (S-1) (S-4) [5] Function CBA (S-4) [3] Stand Cover [2] Stand Hinge [1] Stand Base Plate (S-2) (S-2) (S-2) (S-3) (S-2) Fig. D1 A71G0DC...
Page 25 [8] Jack Holder(D) [10] Digital Main CBA Unit (S-11) Earth Plate (S-10) (S-9) (N-1) (S-12) Shield Plate (S-7) [9] Shield Box (S-12) (S-8) (S-7) [7] Power Supply CBA (S-8) (S-8) (S-8) (S-7) (S-7) [6] Chassis Bracket Fig. D2 A71G0DC...
Page 26 (S-16) [14] Panel Holder (S-16) (S-17) [12] Jack CBA [11] Jack Holder (A) (S-13) (S-14) (S-15) (S-16) (S-15) (S-14) (S-17) (S-16) (S-15) (S-15) [13] Inverter CBA Fig. D3 A71G0DC...
Page 27 [19] Front Cabinet [16] LCD Module Assembly [18] Speaker (S-19) (S-19) (S-19) (S-21) (S-20) (S-19) [17] IR Sensor (S-21) [18] Speaker (S-18) (S-19) [15] T-CON CBA Fig. D4 A71G0DC...
Page 28 TV Cable Wiring Diagram Jack CBA CN7501 To LCD Module Assembly Function CBA CN9002 CN9001 CN102 CN9003 CN9006 CN9005 To LCD T-CON CBA Module Assembly Digital Main Inverter CBA CBA Unit CN3018 CN3023 CN1300 CN3002 CN3001 CN1250 CN552 CN1200 CN1150 CN3010 CN3014 CN1100 Power Supply CBA...
Page 29: Electrical Adjustment Instructions
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. Use the service remote control unit. replacing circuit components and certain mechanical parts. It is important to perform 2.
Page 30 1. Purity Check Mode 2. VCOM Adjustment This mode cycles through full-screen displays of red, *This adjustment is required when reparing T-CON green, blue, and white to check for non-active pixels. CBA. 1. Enter the Service mode. Test Point Adj. Point 2.
Page 31 The following adjustment normally are not attempted in 5. [CUTOFF] the field. Only when replacing the LCD Panel then adjust Press [3] button to select “COB” for Blue Cutoff as a preparation. adjustment. Press [1] button to select “COR” for Red Cutoff adjustment.
Page 32: How To Initialize The Lcd Television
HOW TO INITIALIZE THE LCD TELEVISION How to initialize the LCD television: 1. Turn the power on. 2. To enter the service mode, press the service button on the service remote control unit. (Refer to page 5-1.) - To cancel the service mode, press [POWER] button on the remote control unit.
Page 33: Block Diagrams
BLOCK DIAGRAMS System Control Block Diagram A71G0BLS...
Page 34 Video Block Diagram A71G0BLV...
Page 35 Audio-1 Block Diagram A71G0BLA1...
Page 36 Audio-2 Block Diagram A71G0BLA2...
Page 37 Digital Signal Process Block Diagram A71G0BLD...
Page 38 Inverter Block Diagram A71G0BLINV...
Page 39 Power Supply Block Diagram A71G0BLP...
Page 40: Schematic Diagrams / Cba's And Test Points
SCHEMATIC DIAGRAMS / CBA’S 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.
Page 41 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE_A,_V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V. 2.
Page 42 Power Supply 1/2 Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. VOLTAGE CHART CN301 Pin No. Voltage 12.2 12.2 15.6 34.6 A71G0SCP1...
Page 43 Power Supply 2/2 Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. VOLTAGE CHART CN302 Pin No. Voltage A71G0SCP2...
Page 44 VOLTAGE CHART Inverter Schematic Diagram CN552 Pin No. Voltage CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. NOTE: CAUTION ! : For continued protection against risk of fire, If Main Fuse (F501) is blown , check to see that all components in the power supply The voltage for parts in hot circuit is measured using replace only with same type 4 A, 125V fuse.
Page 45 Jack Schematic Diagram VOLTAGE CHART CN7501 Pin No. Voltage A71G0SCJ...
Page 46 Function Schematic Diagram VOLTAGE CHART CN102 Pin No. Voltage A71G0SCF...
Page 47 IR Sensor Schematic Diagram A71G0SCIR...
Page 48 Digital Main 1/9 Schematic Diagram A71G0SCD1...
Page 49 Digital Main 2/9 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3015. IC3015 is divided into four and shown as IC3015 (1/4) ~ IC3015 (4/4) in this Digital Main Schematic Diagram Section. 8-10 A71G0SCD2...
Page 50 Digital Main 3/9 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3015. IC3015 is divided into four and shown as IC3015 (1/4) ~ IC3015 (4/4) in this Digital Main Schematic Diagram Section. 8-11 A71G0SCD3...
Page 51 Digital Main 4/9 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3015. IC3015 is divided into four and shown as IC3015 (1/4) ~ IC3015 (4/4) in this Digital Main Schematic Diagram Section. A71G0SCD4 8-12...
Page 52 Digital Main 5/9 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3015. IC3015 is divided into four and shown as IC3015 (1/4) ~ IC3015 (4/4) in this Digital Main Schematic Diagram Section. A71G0SCD5 8-13...
Page 53 Digital Main 6/9 Schematic Diagram A71G0SCD6 8-14...
Page 54 Digital Main 7/9 Schematic Diagram A71G0SCD7 8-15...
Page 55 Digital Main 8/9 Schematic Diagram 8-16 A71G0SCD8...
Page 56 Digital Main 9/9 Schematic Diagram A71G0SCD9 8-17...
Page 57 Power Supply CBA Top View Because a hot chassis ground is present in the power NOTE: supply circuit, an isolation transformer must be used. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input hot GND as a common terminal.
Page 58 Power Supply CBA Bottom View Because a hot chassis ground is present in the power NOTE: supply circuit, an isolation transformer must be used. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input hot GND as a common terminal.
Page 59 Inverter CBA Top View NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. CAUTION ! Because a hot chassis ground is present in the power Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. supply circuit, an isolation transformer must be used.
Page 60 Inverter CBA Bottom View NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. CAUTION ! Because a hot chassis ground is present in the power Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. supply circuit, an isolation transformer must be used.
Page 61 Jack CBA Top View BA71F0F01021-4 8-22...
Page 62 Jack CBA Bottom View PIN 6 OF PIN 8 OF PIN 9 OF PIN 14 OF CN7501 CN7501 CN7501 CN7501 PIN 5 OF PIN 3 OF PIN1 OF CN7501 CN7501 CN7501 8-23 BA71F0F01021-4...
Page 63 Function CBA Top View Function CBA Bottom View BA71F0F01021-2 8-24...
Page 64 IR Sensor CBA Top View IR Sensor CBA Bottom View BA71F0F01021-3 8-25...
Page 65: Waveforms
WAVEFORMS WF1 ~ WF7 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) Pin 1 of CN7501 Pin 5 of CN7501 CVBS 0.2V 20µs VIDEO-Pb 0.2V 20µs Pin 9 of CN7501 Pin 6 of CN7501 20µs...
Page 66: Wiring Diagram
WIRING DIAGRAM 10-1 A71G0WI...
Page 67: Exploded Views
EXPLODED VIEWS Cabinet CL7501 Jack CBA CLN102 T-CON SP802 CL3023 Function CBA CLN802 CLN101 CLN801 Digital Main CBA Unit SP801 IR Sensor CBA LCD Module Assembly Power Supply Inverter CBA AC501 See Electrical Parts List for parts with this mark. 11-1 A71G0CEX...
Page 68 Packing Some Ref. Numbers are not in sequence. Tape Packing Tape Packing Tape Packing Tape Packing Tape Packing Tape Packing Tape PP Band 11-2 A71G0PEX...
Page 69: Mechanical Parts List
MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. SP801 SPEAKER MAGNETIC YDP613-1FN DSD0811EFU01 Before replacing any of these components, read SP802 SPEAKER MAGNETIC YDP613-1FN DSD0811EFU01 carefully the product safety notice in this service PACKING manual.
Page 70: Electrical Parts List
ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. C640 ELECTROLYTIC CAP . 22µF/16V M CE1CMASDL220 Before replacing any of these components, read C642 CAP ELE STD-85 4700µF 6.3V SL CE0KMZNDL472 carefully the product safety notice in this service C643...
Page 71 Ref. No. Description Part No. Ref. No. Description Part No. C865 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 D664 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 C866 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 D665 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 C867 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 D666 SWITCHING DIODE 1SS133(T-77)
Page 72 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 150 Ω CARBON RES. 1/4W J 10k Ω R608 RCX4JATZ0151 R689 RCX4JATZ0103 CARBON RES. 1/4W J 2.2k Ω CHIP RES. 1/10W J 10k Ω R609 RCX4JATZ0222 R690 RRXAJR5Z0103 CARBON RES.
Page 73 FUNCTION CBA JACK CBA Ref. No. Description Part No. Ref. No. Description Part No. FUNCTION CBA(MPS-2) ---------- JACK CBA(MPS-4) ---------- Consists of the following: Consists of the following: CAPACITORS CAPACITORS C108 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V CHD1JZ30F104 C7001 ELECTROLYTIC CAP .
Page 74 Ref. No. Description Part No. Ref. No. Description Part No. COILS MISCELLANEOUS L7802 PCB JUMPER D0.6-P5.0 JW5.0T JK7501 JACK HPEP SML PCB S PJ-358H JXSJ020YUQ01 L7803 PCB JUMPER D0.6-P5.0 JW5.0T JK7701 JACK SW DIN PCB S 04 S4-16SH JYEJ040SNJ01 RESISTORS JK7702 JACK SW RCA PCB S RCA-347HDT-02 JYRJ030YUQ01...
Page 75 Ref. No. Description Part No. Ref. No. Description Part No. C1030 ELECTROLYTIC CAP . 47µF/50V M CE1JMASDL470 C1314 CERAMIC CAP . SL D 10pF/3KV CCD3FDASL100 C1040 CHIP CERAMIC CAP . B K 1000pF/50V CHD1JKB0B102 C1315 CHIP CERAMIC CAP . B K 1200pF/50V CHD1JK30B122 C1041 ELECTROLYTIC CAP .
Page 76 Ref. No. Description Part No. Ref. No. Description Part No. D1004 ZENER DIODE MTZJT-776.2B QDTB0MTZJ6R2 D1316 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D1005 ZENER DIODE MTZJT-776.2B QDTB0MTZJ6R2 D1317 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D1006 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D1318 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D1007 ZENER DIODE MTZJT-773.3B QDTB0MTZJ3R3...
Page 77 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 1M Ω Q1602 FET POWER MOS SMD NP22N055SLE-E1-AZ QF2ZNP22N055 R1020 RRXAJR5Z0105 CHIP RES. 1/10W J 22k Ω Q1603 FET POWER MOS SMD NP22N055SLE-E1-AZ QF2ZNP22N055 R1040 RRXAJR5Z0223 CHIP RES.
Page 78 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 5.1k Ω CHIP RES. 1/10W F 47k Ω R1217 RCX4JATZ0512 R1500 RRXAFR5Z0473 CHIP RES. 1/10W F 6.8k Ω CHIP RES. 1/10W F 1.0k Ω R1218 RRXAFR5Z6801 R1501 RRXAFR5H1001 CHIP RES.
Page 79 Ref. No. Description Part No. GP501# GAP . FNR-G3.10D FAZ000LD6005 J1001 BEAD INDUCTOR FBR07HA121TB-00 LLBF00ZTU021 JS502 PCB JUMPER D0.6-P10.0 JW10.0T JS503 PCB JUMPER D0.6-P22.5 JW22.5T JS504 PCB JUMPER D0.6-P20.0 JW20.0T JS1001 PCB JUMPER D0.6-P11.5 JW11.5T SCREW B-TIGHT D3X8 BIND HEAD+ GBJB3080 SA502# SURGE ABSORBER 470V+-10PER...
Page 80 © 2007 Funai Electric Co., Ltd. All rights reserved. No part of this manual may be reproduced, copied, transmitted, disseminated, transcribed, downloaded or stored in any storage medium, in any form or for any purpose without the express prior written consent of Funai.

Sylvania LC370Sl8 Service Manual

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