Page 2
SPECIFICATION Items Contents Dimensions ( W × H × D ) 101.4 cm × 69.8 cm × 29.6 cm [Included stand] 101.4 cm × 64.6 cm × 10.9 cm [TV only] Mass 25.8 kg [Included stand] 22.7 kg [TV only] Power Input AC220V - AC240 V, 50 Hz Power Consumption...
SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware, (6) Isolation Check (Safety for Electrical Shock Hazard) many circuits and components specially for safety After re-assembling the product, always perform an purposes. For continued protection, no changes should be isolation check on the exposed metal parts of the cabinet made to the original design unless authorized in writing by (antenna terminals, video/audio input and output terminals,...
Page 4
INSTALLATION 1.2.1 HEAT DISSIPATION 1.2.3 INSTALLATION REQUIREMENTS If the heat dissipation vent behind this unit is blocked, cooling To ensure safety in an emergency such as an earthquake, and efficiency may deteriorate and temperature inside the unit will to prevent accidents, ensure that measures are taken to prevent rise.
Page 5
1.3.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL) 1.3.4 HOW TO CHECK THE OPERATING TIME (1) Avoid placing the unit under direct sunlight over a This model has a function to count and record the LCD panel prolonged period of time. This may cause the optical filter operating time.
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES HDMI INPUT DIGITAL VNR By connecting a HDMI compatible device, high definition This function cuts down the amount of noise in the original pictures can be displayed on your TV in their digital form. picture.
Page 7
TECHNICAL INFORMATION 2.3.1 LCD PANEL This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the conventional CRT (Cathode Ray Tube), as a display unit. Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.
Page 8
2.3.2 MAIN CPU PIN FUNCTION [IC7001 : MAIN PWB] Pin name Function Pin name Function LINE_IN3R Not used KEY1 Key scan for side control (POWER/VOL/UP/DOWN) LINE_IN3L Not used ECO SENSER Eco sensor detection VDD33_GPIO 3.3V power supply LINE_IN2R Not used SLOW1 EXT-1 SLOW detection LINE_IN2L...
Page 9
Pin name Function Pin name Function TX_DTV Data communication for digital tuner P4.6 I/O Not used TCLK2+ LVDS clock for LCD panel P4.7 I/O Not used TCLK2- LVDS clock for LCD panel BL_ON Power on/off control for back-light [ON = L] VDD25_VOPA 2.5V power supply LCD_POW...
SECTION 3 DISASSEMBLY CAUTION AT DISASSEMBLY • Make sure that the power cord is disconnected from the outlet. • Pay special attention not to break or damage the parts. • Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors. •...
Page 11
POWER CORD COVER POWER CORD REAR COVER MAIN PWB TERMINAL BASE POWER PWB MAIN BASE CONTROL ASSY REMOTE PWB SW PWB LCD SUPPORT STAND BRACKET BOTTOM FRAME LCD PANEL UNIT LCD SUPPORT BRACKET LCD SUPPORT BRACKET SPEAKER LED PWB FRONT PANEL LCD SUPPORT BRACKET SPEAKER Fig.3-1...
Page 12
3.2.10 REMOVING THE LCD CONTROL PWB (Fig.3-2) 3.2.11 REMOVING THE INVERTER PWB (Fig.3-2) • Remove the REAR COVER. • Remove the REAR COVER. • Remove the MAIN BASE. • Remove the SIDE BRACKET. (1) Remove the 4 screws [A]. (1) Remove the 6 screws [B]. (2) Remove the LCD CONTROL PWB COVER.
Page 13
MEMORY IC REPLACEMENT • This model uses the memory IC. • This memory IC stores data for proper operation of the video and drive circuits. • When replacing, be sure to use an IC containing this (initial value) data. 3.3.1 MEMORY IC TABLE Symbol Number of pins Mounting PWB Main content of data...
Page 14
3.3.4 SETTINGS OF FACTORY SHIPMENT 3.3.4.1 BUTTON OPERATION 3.3.4.2 REMOTE CONTROL DIRECT OPERATION Setting item Setting position Setting item Setting position CHANNEL POWER VOLUME CHANNEL ZOOM Auto VOLUME SUB POWER TV/AV VIDEO-3 COMPONENT / COMPOSITE Component 3.3.4.3 REMOTE CONTROL MENU OPERATION (1) PICTURE (4) SET UP Setting item...
Page 15
REPLACEMENT OF CHIP COMPONENT 3.4.1 CAUTIONS (1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it. 3.4.2 SOLDERING IRON (1) Use a high insulation soldering iron with a thin pointed end of it.
SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION (1) This TV is adjusted by using REMOTE CONTROL UNIT. (2) The adjustment using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. (3) Make sure that connection is correctly made AC to AC power source.
Page 17
4.5.5 ADJUSTMENT MODE (1) SIGNAL SYSTEM This mode is used to adjust the VIDEO CIRCUIT. The signal displayed on the screen is displayed. 480 60i : 480i (Component) / HDMI 480i 4.5.5.1 HOW TO ENTER THE ADJUSTMENT MODE 576 50i : 576i (Component) / HDMI 576i When the SERVICE MENU SCREEN of SERVICE MODE is 480 60p...
Page 18
INITIAL SETTING VALUES IN THE SERVICE MODE • Perform fine-tuning based on the "initial values" using the remote control when in the Service mode. • The "initial values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved may be different from the default values.
Page 19
Setting value Variable Item name HDMI 720p50 / range HDMI 480i HDMI 576i HDMI 480p HDMI 576p HDMI 1080i50 12.SHARP 0 - 63 13.CORING 0 - 63 Setting value Variable Item name HDMI 1080i50 / HDMI 1080i60 / range HDMI 1080p50 HDMI 1080p60 HDMI 1080p24 HDMI 1080p50...
SECTION 5 TROUBLESHOOTING SELF CHECK FEATURE SERVICE MODE SCREEN 5.1.1 OUTLINE This unit comes with the "Self check" feature, which checks the operational state of the circuit and displays/saves it during Service Menu failure.Diagnosis is performed when power is turned on, and 1.Adjust information input to the main microcomputer is monitored at all 2.Self Check...
Page 21
5.1.6 DETAILS Self check is performed for the following items: <Page 1 of screen> Diagnosis Detection item Display Detection content Detection timing signal (line) Low bias line short Confirm the operation of the low bais(1V/3.3V/5V/ LB_PRO Detection starts 5 seconds after protection 12V) protection circuit.
Page 22
Victor Company of Japan, Limited Display category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA596<Rev.001>) Printed in Japan...
Page 24
LT-42R90BU STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1.SAFETY Type No indication : Ceramic capacitor The components identified by the symbol and shading are : Metalized mylar capacitor critical for safety. For continued safety replace safety ciritical : Polypropylene capacitor components only with manufactures recommended parts.
Page 25
SW PWB PATTERN ..........................2-31 LED PWB PATTERN ..........................2-31 REMOTE PWB PATTERN ........................2-32 VOLTAGE CHARTS ................... 2-33 WAVEFORMS .................... 2-34 USING P.W. BOARD P.W.B ASS Y name LT-42R90BU MAIN P.W. BOARD SFT-1102A-H3 POWER P.W. BOARD SFT-9053A-H3 SW P.W. BOARD SFT-7210A-H3 LED P.W.
WIRING DIAGRAM DIGITAL TUNER UNIT PL301 PL103 CN00A CN00P PL302 CN00F CN00Q LCD PANEL UNIT [INVERTER PWB(MASTER)] LCD PANEL UNIT DIGITAL TUNER [INVERTER PWB(SLAVE)] LCD PANEL UNIT [LCD CONTROL PWB] CN10UD CN10UU CN10UV CN101A CN0LV1 CN100F POWER CORD CN0PW F9001 ANALOG TUNER 250V/6.3A POWER PWB...
CIRCUIT DIAGRAMS MAIN PWB ASS'Y (1/4) MAIN PWB CIRCUIT DIAGRAM (1/4) MAIN PWB (2/4) SFT-1101A-H3 [LT-42DR9BJ, LT-42DR9BU] MAIN PWB (2/4),(4/4) MAIN PWB (2/4) SFT-1102A-H3 [LT-42R90BU] ADDITION DIFFERENCE PARTS LIST LT-42R90BUA LT-42A90BU A LT-42DR9BJA STB3.3V LT-42DR9BUA LT-32A90BUA ASSY NO. - MODEL LIST...
Page 29
P2_5 RTV OUT IDTV_CR C1404 .1 @label RA7004 STB3.3V C1121 VIN6 P2_6 IC7003 K1103 NQR0389-003X D1103 D1104 LT-42R90BUA LT-42A90BUA LT-42R90BU A LT-42A90BUA Q1102 ZD8.2 R1114 1/10 D1111 NRZ0034-103W LT-42DR9BJ A LT-42DR9BJ A R1115 R1116 ZD8.2 ZD8.2 P2_7 RT4N430C-X C7067 LT-42DR9BU A...
Page 30
MAIN PWB CIRCUIT DIAGRAM (3/4) MAIN PWB ASS'Y (3/4) SFT-1101A-H3 [LT-42DR9BJ, LT-42DR9BU] SFT-1102A-H3 [LT-42R90BU] ASSY NO. - MODEL LIST SFT-1101 A LT-42DR9BJA (OLLC13686) LT-42DR9BUA SFT-1102 A LT-42R90BUA (OLLC13766) SFT-1103 A LT-32A90BUA (OLLC13788) SFT-1104 A LT-42A90BUA (OLLC13823) 3.3V K8501 K8502 NRSA02J-0R0X...
Page 31
OPEN OPEN OPEN OPEN R9221 OPEN SFT-1101A-H3 [LT-42DR9BJ, LT-42DR9BU] R9223 OPEN OPEN OPEN PTZ16B PTZ16B PTZ6.8B PTZ16B D9303 SFT-1102A-H3 [LT-42R90BU] UK3.3V_K9402 SI-8005Q IC9401 OPEN OPEN OPEN ASSY NO. - MODEL LIST NRSA63J NRSA63J NRSA63D NRSA63J R9304 -564X -564X -683X -564X...
OPEN OPEN C9210 R9212 R9207 3.3K (OLLC13688) LT-42DR9BJ P R9220 Q9252 470K PC9202 OPEN OPEN C9220 PS2581AL1/QW/ R9256 OPEN LT-42R90BU A OPEN C9221 C9208 ERROR AMP OPEN 0.0022 LT-42R90BU P IC9203 C9251 R9213 OPEN R9257 Q9253 LT-42DR9BUA TL431/A/-T Q9251 OPEN...
Page 33
POWER PWB CIRCUIT DIAGRAM (2/2) LCD PANEL UNIT LCD PANEL UNIT [INVERTER PWB [INVERTER PWB (MASTER)] (SLAVE)] CN00P QGA2013C2-14 CN00Q GND24 CN00A QGA2013C2-11 C9611 POW_GOOD L9601 Y9602 OPEN K9601 OPEN LB_PRO GND24 PFC_POW C9591 MAIN PWB QCZ9071-102 LCD_POW K9602 Y9601 LB_POW (4/4) MAIN_POW...
VOLTAGE CHARTS WAVEFORMS <MAIN PWB(1/4)> MODE MODE MODE MODE MODE MODE MODE MODE MAIN PWB(1/4) DC (V) DC (V) DC (V) DC (V) DC (V) DC (V) DC (V) DC (V) PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO.
Page 42
Victor Company of Japan, Limited Display category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA596<Rev.001>) Printed in Japan...
PARTS LIST CAUTION The parts identified by the symbol are important for the safety . Whenever replacing these parts, be sure to use specified ones to secure the safety. The parts not indicated in this Parts List and those which are filled with lines --- in the Parts No. columns will not be supplied. P.W.
Page 44
CONTENTS USING P.W. BOARD & REMOTE CONTROL UNIT ....................3-2 EXPLODED VIEW PARTS LIST -1 ..........................3-3 EXPLODED VIEW -1 ..............................3-4 EXPLODED VIEW PARTS LIST -2 ..........................3-5 EXPLODED VIEW -2 ..............................3-5 PRINTED WIRING BOARD PARTS LIST ........................3-6 MAIN P.W.
EXPLODED VIEW PARTS LIST -1 Ref.No. Part No. Part Name Description Local GG10567-001A-LK REAR COVER GG10561-001A-HK FRONT PANEL WJW0090-001A-E DIGITAL(LVDS) CABLE MAIN-LCD PANEL QAS0548-001 SPEAKER (x2) QMPK450-170-JC POWER CORD(EU) 1.7m BLACK GG20205-001A-HK TERMINAL BASE GG10571-001A-U MAIN BASE GG20210-001B-HK BACK BRACKET...
EXPLODED VIEW PARTS LIST -2 Ref.No. Part No. Part Name Description Local QLD0505-001-JUK LCD PANEL UNIT Inc.3A-3B (V420H1-L07) V420H1-L07-TC2 LCD CONTROL PWB (V420H1-L07) V420H1-L07-IVC2 INVERTER PWB 2pcs in 1set (V420H1-L07) EXPLODED VIEW -2 LCD CONTROL PWB COVER INVERTER PWB COVER (No.YA596<Rev.001>)3-5...
PRINTED WIRING BOARD PARTS LIST MAIN P.W. BOARD ASS'Y (SFT-1102A-H3) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D1205 UDZW8.2B-X Z DIODE D1206 UDZW8.2B-X Z DIODE IC1001 MM1510XN-X D1209 MA111-X SI DIODE IC1002 MM1510XN-X D1210...
Page 49
Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C1120 NCB31HK-104X C CAPACITOR 0.1uF 50V K C6521 NCB31HK-103X C CAPACITOR 0.01uF 50V K C1121 NCB31AK-105X C CAPACITOR 1uF 10V K C6671 NCB21AK-225X C CAPACITOR 2.2uF 10V K C1122 NCB31HK-104X...
Page 50
Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C7078 NCB31HK-104X C CAPACITOR 0.1uF 50V K C9302 NCJ41HK-335X-U C CAPACITOR 3.3uF 50V K C7079 NCB20JK-106X C CAPACITOR 10uF 6.3V K C9303 NCJ41EK-106X-U C CAPACITOR 10mF 25V K C7080 NCB20JK-106X...
Page 51
Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R1210 NRSA63J-222X MG RESISTOR 2.2kΩ 1/16W J R7022 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J R1211 NRSA63J-391X MG RESISTOR 390Ω 1/16W J R7023 NRSA63J-102X MG RESISTOR 1kΩ...
Page 52
Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R8017 NRSA63J-104X MG RESISTOR 100kΩ 1/16W J R8018 NRSA63J-104X MG RESISTOR 100kΩ 1/16W J L1001 NQL79GM-100X COIL 10uH M R8019 NRSA63J-104X MG RESISTOR 100kΩ 1/16W J L1002 NQL79GM-100X COIL...
SW P.W. BOARD ASS'Y (SFT-7210A-H3) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local Q9503 2SC1623A/5-6/-X TRANSISTOR Q9504 UN2213-X DIGI TRANSISTOR D7001 UDZW6.2B-X Z DIODE Q9505 UN2212-X DIGI TRANSISTOR D7101 1SS355W-X DIODE Q9506 UN2212-X DIGI TRANSISTOR Q9507...
Page 54
Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C9560 NCB31HK-473X C CAPACITOR 0.047uF 50V K R9572 NRSA63J-473X MG RESISTOR 47kΩ 1/16W J C9561 NCB31HK-104X C CAPACITOR 0.1uF 50V K R9573 NRSA02J-562X MG RESISTOR 5.6kΩ...
REMOTE CONTROL UNIT PARTS LIST (RM-C1932-1C) Ref.No. Part No. Part Name Description Local 59005-0002680 BATTERY COVER PACKING EURO LABEL PACKING PARTS LIST Ref.No. Part No. Part Name Description Local GA10290-025A-U PACKING CASE GA10309-001A-U CUSHION ASSY 4pcs in 1set RM-C1932-1C REMOTE CONTROL UNIT ------------...