Summary of Contents for DigitalDevice DLP-37D1
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Page 1: Service Manual
Service Manual LCD TV Panel Grade; HD Ready Buyer Model No.: DLP-37D1 Manufacturer Model No.: LD-3760 DIGITALDEVICE, INC... -
Page 2: Table Of Contents
Contents 1. Specifications................................................. 4 1-1. Description................................................4 1-2. Features................................................4 1-3. STRUCTURE AND PRINCIPLE OPERATION OF LCD..................................... 5 1-4. General Specification............................................. 9 1-4-1. Specification............................................... 9 1-4-2. I/O Description............................................11 1-5. Operation Environmental Conditions........................................11 1-6. Storage Environmental Conditions.......................................... 11 1-7. - Page 3 4-1-4. Assembly of Panel Ass’y..........................................22 4-1-5. Assemblage of Board..........................................23 4-1-6. Assemblage of PCB Cover........................................... 24 4-1-7. Assemblage of Rear Cover........................................... 25 4-1-8. Assemblage of Stand........................................... 26 4-2. Screw Part Name..............................................27 4-3. Part List................................................29 5.
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Page 4: Specifications
1-1. Description. The DLP-37D1(37 inch ) is a color active matrix TFT(Thin Film Transistor) LCD(Liquid Crystal Display) that uses amorphous silicon TFT as a switching devices. This model is composed of a TFT LCD panel, a driver circuit and a back light system. The resolution of a 37” contains 1366 x 768 pixels and can display up to 16.7 million colors with wide viewing angle of 170° or higher in all directions. -
Page 5: Structure And Principle Operation Of Lcd
1-3. STRUCTURE AND PRINCIPLE OPERATION OF LCD. Basics of LCD Operation A cross sectional view of a liquid crystal display is shown below in Figure 1. As can be seen in the diagram, the display is simply two pieces of extremely flat glass, over coated with a number of chemical layers, and filled with liquid crystal fluid. - Page 6 Photoresist is then put on top of the ITO coating and a photolithographic process is used to image the pattern. The exposed patterns are then developed and the glass is sent through an acid bath where the excess ITO is removed, similar to the way a PC board is made. The remaining photoresist is then stripped away and the patterned segment and common plane electrodes remain on the glass.
- Page 7 II. Operation of a liquid crystal display. The liquid crystal molecules are long and thin as shown in Figure 2 on the right. On the bottom glass substrate, the PI layer has been rubbed from back to front, and the molecules are aligned in that direction. Remember, the direction of this orientation determines the viewing angle of the part.
- Page 8 When a drive signal is applied to the cell electrodes an electric field is set up across the cell. The liquid crystal molecules will "stand up" to align themselves in the direction of the electric field. When the molecules "stand up" the helical structure is disrupted, and the incoming linearly polarized light does not "twist"...
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Page 9: General Specification
1-4. General Specification. 1-4-1. Specification. 1-4-1-1. PAL/SECAM. HDMI Input & DVI Sound In PC (RGB) Component 1 Component 2 Input Type Display Mode AUDIO Line-Out SCART Input Power Inlet RS-232C for Service Video System: PAL/SECAM Sound System: B/G, D/K, I, L/L’ FS 181 Program FVS Tuning (max 100programs) TV System... - Page 10 Multi-Step Zoom Sleep Timer off ~ 180 minutes Picture in Picture (PIP) with 4 corner position Multi Picture (Twin, PIP, size, Position, Swap) TWIN Window (Picture by Picture) Picture Still Teletext(No. of pages) 252 pages Audio Mute VGA, SVGA, XGA, SXGA PC(Analog RGB) Max.
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Page 11: I/O Description
1-4-2. I/O Description. 1-5. Operation Environmental Conditions. Temperature 0 to 50 °C (with forced-air cooling) Humidity 20 to 40 °C to 80% RH (without condensation) 1-6. Storage Environmental Conditions. Temperature -20 to 60 °C Humidity 10 to 70% RH (without condensation) 1-7. -
Page 12: Block Diagram
2. Block Diagram. 2-1. Panel Block Diagram. LG Panel... -
Page 13: Connector Layout & Pin Assignment
2-2. Connector Layout 2-2-1 PAL & SECAM – SCART. 2-2-1-1 Main Board & Sub Board. -
Page 14: Board Assembling
3. Board Assembling. 3-1. Preparation. Place a sheet over a flat table which can support the weight of LCD. ① <CAUTION> The sheet must be clean, smooth and thick enough to reduce any impact which might occur while handling. Lay down the unit with the rear cover facing up. ②... -
Page 15: Board Assembly Diagram
3-2. Board Assembly Diagram 3-2-1 Harness Path Diagram. (PAL/SECAM). Model DLP-37D1 Panel System PAL/SECAM Name Part Code Q’ty AD POWER DD-L32ADP-40 12P*15P*300MM LVDS DD-L32LVD-41 30P*30P*300MM INVERTER DD-L37INR-40 12P*12P*400MM INVERTER DD-L37INL-40 12P*12P*4P*500MM SPEAKER DD-L32SPK-40 6P*LUG(A,B)*550MM KEY-IR DDL32KEYIR40 14P*8P*6P*400mm*500mm NOISE FILTER*2P+GND DD-L32MPN-20... - Page 16 Assembly of ‘⑧ GND Harness Path’ Q’ty Name Part Code GND HARNESS (IR PCB to Panel BKT) DDL32GND—40 200MM GND HARNESS 1. GND Harness(IR PCB to Panel BKT) (IR Knob to Panel BKT) DDL37GND—40 400MM 2. GND Harness(IR PCB to Panel BKT) As an above image, for protecting PCB from static electricity, GND Harness should be connected between Panel BKT and IR PCB, IR Knob, respectively.
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Page 17: Board Sort
3- 3. Board Sort. 3-3-1 How to sort Main PCB according to Panel Maker (LG or Samsung). Main PCB for LG Panel Chip was soldered on FB49, R574 of Main PCB for LG Panel. -
Page 18: How To Sort Tuner Pcb According To System (Pal, Atsc, 3-System)
3-3-2 How to sort Tuner PCB according to System (PAL, ATSC, 3-System). Tuner PCB for PAL System Tuner PCB for ATSC System Tuner PCB for 3-System System Tuner PCB for 2 RCA... -
Page 19: Set Assembly
4. Set Assembly. 4-1. Assembly Diagram. 4-1-1. Assemblage of Front Parts. Step1 Step 1 Put down the front Step2 Step 2 Assemble Speaker Grill & elbow Use the Screw No.1 (4ea) No.2 (14ea) Step3 Step 3 Assemble L/R Speaker Unit Use the Screw No.1 (8ea) -
Page 20: Assemblage Of Ir
4-1-2. Assemblage of IR. Step1 Step2 Step 1 Assemble Window IR Step 2 Assemble Window Plate Step3 Step4 Step 3 Assemble Knob Stand by Use the Screw No.1(4ea) Step 4 Assemble Key IR Use the Screw No. 1(2ea) -
Page 21: Sub Panel Assembly
4-1-3. Sub Panel Assembly. Step1 Step 1 Open the Box & Put down the Panel Assemble Panel Cover Use the Screw No.3(8ea) Step2 Step 2 Assemble Stand Support Use the Screw No.2 (2ea) -
Page 22: Assembly Of Panel Ass'y
4-1-4. Assembly of Panel Ass’y. Step1 Step 1 Assemble Panel Ass’y Use the Screw No.2 (9ea) -Top 4ea -Bottom 5ea... -
Page 23: Assemblage Of Board
4-1-5. Assemblage of Board. Step 1 Step1 Assemble Main Board & Retainer Coil(1ea) Use the Screw No.4(12ea) Hold the LVDS Cable Use the Retainer Coil Step 2 Assemble Noise filter -Assemble Earth bolt Use the Screw No. 5(1ea) -Assemble Noise filter Use the Screw No. -
Page 24: Assemblage Of Pcb Cover
4-1-6. Assemblage of PCB Cover. Step1 Step 1 Assemble PCB Cover Use the Screw No.2 (14a), Step 2 Assemble PCB Cover Step2 Use the Screw No.3 (1ea) , No.7 (7ea) , No.8 (2ea) -
Page 25: Assemblage Of Rear Cover
4-1-7. Assemblage of Rear Cover. Step1 Step 1 Assemble Knob Control Use the Screw No.1(6ea) Step2 Step 2 Assemble Rear Cover Use the Screw No. 2 (14ea) -
Page 26: Assemblage Of Stand
4-1-8. Assemblage of Stand. Step1 Step2 Step 1 Assemble Stand Cover Step 2 Assemble Stand Base Use the Screw No.9 (4ea) No.10 (4ea) Step 3 Assemble Rubber Step3 Step4 Step 4 Assemble Stand Ass’y Use the Screw No.11 (6ea) -
Page 27: Screw Part Name
4-2. Screw Part Name. IMAGE SORT NAME / SPEC No.1 Taptite + Washer + Panhead TWP 3*6 Black No.2 Taptite + Panhead T/S-2B+4*10Ni No.3 Machine Screw + Washer+ Panhead WP+4*8 Black Machine Screw + Plain Washer + No.4 SW/PW BP+3*8 Spring Washer Machine Screw + Panhead + External No.5... - Page 28 No.8 Hexa Nut HEXA NUT No.9 Taptite + Panhead T/T-BP+4*8 No.10 Machine Screw OVEL + M4*10 Machine Screw + Trusshead T+4*16 Black No.11...
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Page 29: Part List
4-3. Part List. Part Code Part Name Mat./Spec Q’ty DL3760M150A1 CABINET FRONT-378-DW MOLD/ABS/1TONE DL3760M150A2 CABINET FRONT-378-DW MOLD/ABS/2TONE DL3760M160BA COVER REAR-378-DW MOLD/ABS/BLACK DL3760M1700A1 SPEAKER GRILL-60-DW MOLD/ABS/BLACK DL3760M1700A2 SPEAKER GRILL-60-DW MOLD/ABS/SILVER DL3280M181BA KNOB CONTROL-3280 DW MOLD/ABS/BLACK DP4260M112A SPEAKER ELBOW-4260 MOLD/ABS/2.0T/BLACK DP4260M113A SPEAKER ELBOW-4260 MOLD/ABS/2.0T/SILVER DL3280M170A1 COVER STAND-326-DW... -
Page 30: Trouble Shooting
5. Trouble Shooting. This can eliminate misjudgments as defects due to user’s improper usage, by providing possible defective symptoms, checking the causes of defects, and repair instructions. Below images shows a simple drawing of the LCD(fig.1). Following description is based on fig.1. Fig .1 Defect description will be categorized as follows. -
Page 31: Power Failure
5-1. Power Failure. < SYMPTOM > 1. LED is not lit at the Standby mode (If Power is working properly, LED color should be Red at Standby mode.). 2. The set’s Power & LED does not turn on (If Power is working properly, LED color should be Blue at Operation mode.). 3. -
Page 32: Picture Failure
5-3. Picture Failure. < SYMPTOM > 1. Nothing appears on screen but sound is working. 2. Brightness, Black Line or Black square. 3. ‘No Signal’ OSD is displayed on screen, or Picture is poor. Check the input source, cable connection and output setting value for A/V device(DVD player, VCR, Settop Box…) before testing as described below. Video mode is AUTO. -
Page 33: Sound Failure
5-4. Sound Failure. < SYMPTOM > 1. There is no Sound in all modes (Picture appears but there is no sound in all modes.). 2. There is no Sound in a certain mode (But sound is working in other mode.) or sound quality is poor. 3. -
Page 34: Firmware Update Method
6. Firmware Update Method. 6-1. Main Board Firmware Update. 1. Set Main Power off. (Pull out power cord from LCD TV.) 2. Insert Phone Jack using RS232 to stereo jack Cable below Fig. 1. Fig. 1. Main Board Input Jack. Fig.3.
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