Mitsubishi LT-3280 Service Manual

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.9351 Jeronimo Road, Irvine, CA 92618-1904Copyright © 2005 Mitsubishi Digital Electronics America, Inc.

Page 10MODELS: LT-3280D/LT-3780D7A. (LT-3280D)(NOT NECESSARY FOR PANEL REPLACEMENT)REMOVE:a. PLATE-MAIN-SIDEb. SERVICE-KITc. PLATE-MAIN-BOTTOMd. PLAT

MODELS: LT-3280D/LT-3780DPage 11S11：SCREW IH M3*6S15：SCREW_HH+SW _UNC4#-40*7_H5PLATE-MAIN-SIDE7B. (LT-3780D) REMOVE:a. PLATE-MAIN-SIDEb. SERVICE-KIT

Page 12MODELS: LT-3280D/LT-3780D8. (LT-3780D ONLY) REMOVE SHIELD-INVERTERS9：SCREW PHW M3*6ITEM 144: AL-TAPEIt sticks on the position of a figure.S5：S

MODELS: LT-3280D/LT-3780DPage 13S6：SCREW BH 3*12 TP-P9. REMOVE FUNCTION-KEY-KITS4：SCREW BH 3*8 TP-P10. REMOVE IR-KITS4：SCREW BH 3*8 TP-P11. REMOVE

Page 14MODELS: LT-3280D/LT-3780D12. REMOVE POWER-KIT & SPEAKER CONNECTORS4：SCREW BH 3*8 TP-PSPEAKER-CONNECTERPOWER-KIT13A. (LT-3280D)(NOT NECESSA

MODELS: LT-3280D/LT-3780DPage 1513B. (LT-3780D)REMOVE:a. A-PWB-MAIN 2b. SA-PWB-POWER (NOT NECESSARY FOR PANEL REPLACEMENT)c. A-PWB-POWER-SUB2S17：SCRE

Page 16MODELS: LT-3280D/LT-3780D14. (LT-3780D) REMOVE PANEL_BKTS2：SCREW BH M4*5.5ATTACH AL-TAPES5：SCREW BH 4*16TP-PS5：SCREW BH 4*16TP-P144 143S2：SCRE

MODELS: LT-3280D/LT-3780DPage 17S8：SCREW BH 4*12TP-PScrew with GND-Wire(90mm).Screw with GND-Wire(50mm).15A. (LT-3280D) REMOVE FRONT-KIT & SPEAKE

Page 18MODELS: LT-3280D/LT-3780DS1：SCREW PH M4*1216. (LT-3280D) REMOVE PANEL_BKTTop & Bottom is same.4 PCS (2x2)S2：SCREW BH M4*5.5REMOVE CNF1/CN1

MODELS: LT-3280D/LT-3780DPage 1918. (LT-3780D) REMOVE SUPPORT-PANEL-BKT-RIGHT, LEFT, TOP, BOT-TOMLeft & Right is same.Bottom & Top is same.S2

Page 20MODELS: LT-3280D/LT-3780D7014040ITEM 144:Alumi-tape 20X 45, 1Q'tyITEM 132:Insulating-tape10X70The electrode of a connector is insulated.I

MODELS: LT-3280D/LT-3780DPage 2120. REMOVE FUNCTION-KEY-KITS17：SCREW PH+SW+TW M3*63 PCSSA-PWB-IRSHIELD-IR-TOP SHIELD-IR-BOTTOMREVERSE SIDES4：SCREW BH

Page 22MODELS: LT-3280D/LT-3780D22. REMOVE SERVICE-KITSA-PWB-SERVICECOVER-SERVICEPLATE-SERVICES15：SCREW_HH+SW _UNC4#-40*7_H5S9：SCREW PHW M3*62 PCSAf

MODELS: LT-3280D/LT-3780DPage 23SPEAKER_LSPEAKER_RS17:GNDMS2MCMCS18:PANEL-GNDF1MS1F3PEPDPDPEMBMAMASPMB2MB1PAPBPBPCPCPC:Don't touch RADIATORF3F3F3

Page 24MODELS: LT-3280D/LT-3780DWIRING LAYOUT: LT-3780DDSPEAKER_LSPEAKER_RS17:GNDMS2MCMCS18:PANEL-GNDF1MS1F1PEPDPDPEMBCNF1CNF2MAMASPMB2MB1PA PBPBPCPCP

MODELS: LT-3280D/LT-3780DPage 25Initial SetupA. Option Menu SetupFollow the steps below for the initial set-up:1. Disconnect the HD-4001.2. Place the

Page 26MODELS: LT-3280D/LT-3780DMagenta31Red31Yellow31Green31Cyan31Blue31Magenta31Red31Yellow31Green31Cyan31Blue31PC Power SaveOffVideo MuteOnADVANCED

MODELS: LT-3280D/LT-3780DPage 27Circuit explanation1.1.1.1.1. V V V V Video circuitsideo circuitsideo circuitsideo circuitsideo circuitsIt explains th

Page 28MODELS: LT-3280D/LT-3780D1-2. Video input circuit of Monitor LinkTM A/V InputIn Monitor LinkTM A/V Input, it is inputted into IC400 of the sig

MODELS: LT-3280D/LT-3780DPage 292.2.2.2.2. Audio circuitsAudio circuitsAudio circuitsAudio circuitsAudio circuitsIt explains the audio circuits an

MODELS: LT-3280D/LT-3780DPage 3CONTENTSPRODUCT SAFETY NOTICE & SAFETY PRECAUTIONS...

Page 30MODELS: LT-3280D/LT-3780D3.3.3.3.3. Power circuit Power circuit Power circuit Power circuit Power circuitFor power supply of LT-3280D and LT-37

MODELS: LT-3280D/LT-3780DPage 314.4.4.4.4.Protection CircuitProtection CircuitProtection CircuitProtection CircuitProtection CircuitLT-3280D and LT-37

Page 32MODELS: LT-3280D/LT-3780D LCD- IC700 HD64F2437FV (MAIN_CPU) MS2 MS1 IC400 gm1601 (Scaler & Video Proceccor with CPU) IC400 (DDR-SDRAM) IC

MODELS: LT-3280D/LT-3780DPage 33J500 HDMI IC501 EEP2K IC500 SiI9993CTG (HDMI_Rx) J200 D-SUB (PC) IC203 AD9888KSZ-170 (ADC for PC) IC200 EEP1K IC201 LC

Page 34MODELS: LT-3280D/LT-3780D MUTE Circuit (Q301~Q304) SP AUDIO CIRCUIT BLOCK-DIAGRAM for LT-3780/LT-3280 PC AUDIO IN (J304) MonitorLinkTM A/

MODELS: LT-3280D/LT-3780DPage 35Troubleshooting1.1.1.1.1.Power failurePower failurePower failurePower failurePower failure(1)POWER is turned off.(1)PO

Page 36MODELS: LT-3280D/LT-3780D ☆Short1 mode: The POWER-LED blinking is 1 time within a cycle. NO Pcba-POWER-SUB1 is out of order.(Only LT-3780D) P

MODELS: LT-3280D/LT-3780DPage 37 Is the back-light on? YES NO Confirms that the BLON voltage of PE (Pin5). Is the voltage of BLON more than 2V? NO

Page 38MODELS: LT-3280D/LT-3780D2. No picture displayed and picture errors.2. No picture displayed and picture errors.2. No picture displayed and pict

MODELS: LT-3280D/LT-3780DPage 39 Is all harness connected correctly? NO Poor harness connection or defective cable. YES Enter an input of WXGA(

MODELS: LT-3280D/LT-3780DPage 4

Page 40MODELS: LT-3280D/LT-3780D3. No audio output generated.3. No audio output generated.3. No audio output generated.3. No audio output generated.3.

MODELS: LT-3280D/LT-3780DPage 413-2. 3-2. 3-2. 3-2. 3-2. No each(L or R) of audio output generated.No each(L or R) of audio output generated.No each(L

Page 42MODELS: LT-3280D/LT-3780D4. Other faults4. Other faults4. Other faults4. Other faults4. Other faults Notes) It considers the case where there a

MODELS: LT-3280D/LT-3780DPage 434-2. Button switch is not effective.4-2. Button switch is not effective.4-2. Button switch is not effective.4-2. Butto

Page 44MODELS: LT-3280D/LT-3780DPart Number Description260-320006-011 BAR-BEZEL FRONT200-320039-0101 BEZEL-FRONT250-320026-011 BRACKET-PANEL250-320025

MODELS: LT-3280D/LT-3780DPage 45Part Number Description260-370002-011 BAR-BEZEL FRONT200-370009-0101 BEZEL-FRONT250-370001-011 BRACKET-PANEL SUPPORT R

Page 46MODELS: LT-3280D/LT-3780D

改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法DIMINmm*出図先 尺度SCALENTS作成日付DATEMREVISION NO.理同期**摘 要REMARKCHANGEMARKSUBITEMITEM32 33

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

T1T2T3R1R2R3R4R5VSSVDD改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISI

MODELS: LT-3280D/LT-3780DPage 5PRODUCT SAFETY NOTICEMany electrical and mechanical parts in television receivers have special safety related character

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法DIMINmm*出図先 尺度SCALENTS作成日付DATEMREVISION NO.理同期**摘 要REMARKCHANGEMARKSUBITEMITEM32 33

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

MFMF改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMAR

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法DIMINmm*出図先 尺度SCALENTS作成日付DATEMREVISION NO.理同期**摘 要REMARKCHANGEMARKSUBITEMITEM32 33

MBMBMBMMFCEBPCEMB改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法DIMINmm*出図先 尺度SCALENTS作成日付DATEMREVISION NO.理同期**摘 要REMARKCHANGEMAR

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

Page 6MODELS: LT-3280D/LT-3780D

改定ＣＨＡＮＧＥ23456789101112345678910111bacdefgbacdefg改番副番 品番標マ｜ク規格MATERIAL(MI)MARKCOCOAPP. FROM改AND DIMENSIONS第３角法*出図先 尺度 作成日付MREVISION NO.理同期**摘要REMARKCHA

MODELS: LT-3280D/LT-3780DPage 7DISASSEMBLY & PANEL REPLACEMENT PROCEDUREAV1-COVERAV2-COVERDTV-COVERSTAND-FRAME-COVER2. PLACE SET FACE DOWN ON A S

Page 8MODELS: LT-3280D/LT-3780D4. REMOVE BACK COVER KIT.S5：SCREW BH 4*16TP-PF07:CABLE-CLAMPS14S5S5S5S5S5S5S5S5S5 S5S5S5S5S5S14S10：SCREW IH M4*8SCERW

MODELS: LT-3280D/LT-3780DPage 95. REMOVE WALL MOUNT BRACKET6. REMOVE SHIELD-POWER-SUB & SHIELD-CASEMAIN.SHIELD-CASE-MAINSHIELD-POWER-SUBS9：SCREW