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CHAPTER 3. DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . 3 - 1
CHAPTER 4. TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
CHAPTER 5. WAVE FORM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
CHAPTER 6. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1
CHAPTER 7. CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
CHAPTER 8. PARTS LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1
Parts marked with "!" are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
SERVICE MANUAL
MODEL
CONTENTS
Product Name
Model Name
For North America
LL-T1815H
LL-T1815U
LL-T1815B
LL-T1815Y
SHARP CORPORATION
CODE : 00ZLLT1815SME
LCD MONITOR
LL-T1815H
LL-T1815B
For others
LL-T1815E
LL-T1815P
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
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Summary of Contents for Sharp LL-T1815H
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Page 1: Table Of Contents
SERVICE MANUAL CODE : 00ZLLT1815SME LCD MONITOR LL-T1815H LL-T1815B MODEL CONTENTS CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION . . . 1 – 1 CHAPTER 2. CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS ..2 – 1 CHAPTER 3. - Page 2 SERVICE PRECAUTION [OVERCURRENT PROTECTION ELEMENT FOR USB OUTPUT OF THE POWER UNIT] The USB output (5V, connector CN2) of the power unit is provided with an overcurrent protection element (Part Number PTC101) of PTC (positive characteristics thermister). Its resistance becomes high when heated by an overcurrent, and shuts down the circuit similarly with a fuse. When it is cooled down by non-conduction, its resistance returns to a low level and allows a current to flow through the circuit.
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Page 3: Chapter 1. Outline Of The Product, Nomenclature And Function
Advanced-Super-V and Anti Glare Low Reflection TFT LCD module • Power supply • Resolution (max.) AC100-240V, 50/60Hz (Use special AC adapter, type NL-A03E of SXGA 1280 u 1024 pixels Sharp Corporation.) • Temperature of operating environment • Displayable colors (max.) 5 - 35°C 16.77 million colors (8 bit) •... - Page 4 PC-UM10M Relevant signal timings (analog) Relevant signal timings (digital) Hsync Vsync Dot frequency Hsync Vsync Dot frequency Display mode Display mode (kHz) (Hz) (MHz) (kHz) (Hz) (MHz) 640 u 480 640 u 480 VESA 31.5kHz 60Hz 25.175MHz VESA 31.5kHz 60Hz 25.175MH 37.9kHz 72Hz...
- Page 5 PC-UM10M The DVI-I input connector pin PRODUCT DESCRIPTION Front side Rear side Function Function TMDS data 2- Hot plug detection TMDS data 2+ TMDS data 0- TMDS data 2/4 shield TMDS data 0+ N.C. TMDS data 0/5 shield N.C. N.C. 1.
- Page 6 PC-UM10M HEIGHT ADJUSTMENT, ANGLE ADJUSTMENT, Rotation (long height/width) ROTATION (LONG HEIGHT/WIDTH) The display can be rotated for a long height or width to suit the dis- played content. Caution: • Pressure from hands on the LCD panel could cause dam- age.
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Page 7: Chapter 2. Connection, Adjustment, Operation, And Functions
PC-UM10M CHAPTER 2. CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS 1. CONNECTING THE MONITOR AND TURNING THE MONITOR ON AND OFF CONNECTING THE MONITOR TO A COMPUTER Caution: • When connecting, ensure that both the monitor and com- puter are switched off. Connecting using accessory analog signal cable •... - Page 8 PC-UM10M When connecting using separately sold digital or analog When connecting using a separately sold 2-input cable signal cables The separately sold 2-input cable (model name:NLC03J) enables 2 sys- The separately sold display cable enables connection between the DVI- tem connection. I input terminal on the display and the digital or analog RGB output ter- 1.
- Page 9 PC-UM10M Connect the accessory audio cable TURNING THE POWER ON When the accessory audio cable is connected to the audio output termi- 1. Turn on the main power of the monitor. nal of the computer, the sound of the connected computer is output from the display speakers.
- Page 10 PC-UM10M CHANGING BETWEEN INPUT TERMINALS INSTRUCTIONS FOR ATTACHING A VESA COM- PLIANT ARM Use the INPUT button to switch between signal input terminals. An arm or stand based on the VESA standard (commercially available) Select [INPUT-1] Select [INPUT-2] can be attached to the monitor. Procurement of the arm or stand is at the customer’s discretion.
- Page 11 PC-UM10M 5. Attach the arm to the monitor with the four screws. 11.Click on [Install]. Installation will begin. 12.When the message indicating installation is finished is displayed, click [Next]. 13.Click on [Finish]. 14.Click on [Yes] and restart the computer. For Macintosh 1.
- Page 12 PC-UM10M 2. ADJUSTMENT 2-1. ADJUSTMENT METHOD 1) All reset of the adjustment values While pressing , turn on the power. MENU 2) Reset of the ADJUSTMENT menu Press MENU simultaneously. 3) Adjustment lock and lock release While pressing , turn on the power. MENU Valid even when there is no input signal.
- Page 13 PC-UM10M 7) Version display [Range of adjustment values] Range of adjustment Initial value While pressing , turn on the power. MENU × 10000 0 -6 × 1000 0 - 9 × 100 0 - 9 VERSION XX × 10 0 - 9 ×...
- Page 14 PC-UM10M 2-2. ADJUSTMENT ITEM LIST BUTTON ITEM ADJUSTMENT DESCRIPTION MENU MENU 1: MANUAL CLOCK 0~255 CLOCK: The figure below demonstrates how to adjust so that verti- ADJUSTMENT cal flicker noise is not emitted. (e d buttons) PHASE 0~31 PHASE: The figure below demonstrates how to adjust so that hori- zontal flicker noise is not emitted.
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Page 15: Chapter 3. Disassembly And Assembly
PC-UM10M CHAPTER 3. DISASSEMBLY AND ASSEMBLY 1. Separating the display from the stand 1) Remove the four screws A and remove the display 1 from the stand 2. 2. Display 1) Remove the seven screws B and remove the rear cabinet 3. 2) Remove the seven screws C and remove the PWB shield 4. - Page 16 PC-UM10M 3. Stand 1) Remove the five screws A and separate the *** 1 from the base 2. 2) Remove the cover 3. 3) Remove the six screws B and remove the *** 4. 4) Remove one screw C and remove the cover 5. 5) Remove the two screws D and remove the *** 6.
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Page 17: Chapter 4. Trouble Shooting
PC-UM10M CHAPTER 4. TROUBLE SHOOTING First of all, check that all the following accessory cables are properly connected. Also check that the video mode setup of your PC is set to the signal timing conforming to this machine. Accessory cables •... - Page 18 PC-UM10M Is the input signal port connected to the analog sig- IPress the INPUT key to switch to the proper input 3 (No) nal cable? signal port. 4 (Yes) 3 (No) Is DC+12V outputted from CN7 3PIN - 9PIN? Check the power unit. 4 (Yes) Is LD60 at DC+5V? Check the DC+5V power line and IC25 peripheral...
- Page 19 PC-UM10M 4 (Yes) (Yes) Replace the LCD module. 3 (No) Is the positive (+) side of C162 at DC+12V? Check IC24 peripheral circuits. 4 (Yes) 3 (No) Is 7PIN of ICN6 at DC0V? Check R221. 4 (Yes) Replace the LCD module Is the main PWB LD54 at DC+12V? Check F3 in the power unit, the power line, and the 3 (No)
- Page 20 PC-UM10M 4 (No) Does the color flicker when displaying whole Check IC10, IC11, and IC12 peripheral circuits. 3 (Yes) black from the signal source? 4 (No) 4 (Yes) Does the display deflect or flicker? Are the adjustment items of ADJUSTMENT and Set the items properly according 3 (Yes) 3 (No)
- Page 21 PC-UM10M THE PC DISPLAY DOES NOT WORK. (DIGITAL DVI) 3 (No) Does the display work normally with analog inputs? First, check with analog inputs. 4 (Yes) 3 (No) Is 14Pin of CN2 at DC+5V? Check CN2 and the signal source. 4 (Yes) Are the signal levels of 1PIN, 2PIN, 9PIN, 10PIN, IIC8 abnormality...
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Page 22: Chapter 5. Wave Form
PC-UM10M CHAPTER 5. WAVE FORM Waveform measurement condition: Input each of the display patterns and measure the waveform (timing chart) Wave-form No. Measurement point Name of waveform Display pattern IC16’s 21PIN XIN1 Arbitrary X1's PIN on C113 side XIN2 Arbitrary LD12 VSYNC Arbitrary... - Page 23 PC-UM10M WAVE FORM4 : HSYNC (LD11) WAVE FORM7 : LVDS CK ( IC23's 29, 30, 41, 42PIN Frequency: 80kHz Frequency: 54kHz Display screen: Arbitrary Display screen: Arbitrary 500mV/DIV, 10ns/DIV 2V/DIV, 5µs/DIV WAVE FORM5 : LCD CLK (LD20) WAVE FORM8 : LCD DATA (RN1 - RN12) Frequency: 54MHz Display screen: Pattern in every 2 lines of black and...
- Page 24 PC-UM10M WAVE FORM10 :RGB OUT ( IC8 side of C7, C11, C15 Display screen: 16 monochromatic gradation patterns 500mV/DIV, 4µs/DIV WAVE FORM11 : SDRAM I/O DATA IC10/11/12's 2, 3, 5, 6, 8, 9, 11, 12, 39, 40, 42, 43, 45, 46, 48, 49PIN Display screen: 16 monochromatic gradation patterns 51V/DIV, 2µs/DIV WAVE FORM11 :...
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Page 25: Chapter 6. Block Diagram
PC-UM10M LL-T1815 BLOCK DIAGRAM 6 – 1... - Page 26 PC-UM10M LL-T1815 CIRCUIT DIAGRAM 7 – 1...
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Page 27: Chapter 7. Circuit Diagram
PC-UM10M LL-T1820-H/B CIRCUIT DIAGRAM 7 – 2... - Page 28 PC-UM10M LL-T1815 CIRCUIT DIAGRAM 7 – 3...
- Page 29 PC-UM10M LL-T1820-H/B CIRCUIT DIAGRAM 7 – 4...
- Page 30 PC-UM10M LL-T1815 CIRCUIT DIAGRAM 7 – 5...
- Page 31 PC-UM10M LL-T1820-H/B CIRCUIT DIAGRAM 7 – 6...
- Page 32 PC-UM10M LL-T1815 CIRCUIT DIAGRAM 7 – 7...
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Page 33: Chapter 8. Parts Layout
PC-UM10M CHAPTER 8. PARTS LAYOUT POWER BOARD LL-T1815 PARTS LAYOUT 8 – 1... - Page 34 PC-UM10M MAIN BOARD(A side) LL-T1820-H/B PARTS LAYOUT 8 – 2...
- Page 35 PC-UM10M MAIN BOARD(B side) LL-T1815 PARTS LAYOUT 8 – 3...
- Page 36 COPYRIGHT 2002 BY SHARP CORPORATION All rights reserved. Printed in Japan. No part of this publication may be reproduced, stored in a retrieval system, or transmitted. In any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.