Sierra Wireless SyncMaster 800TFT user manual

User manual for the device Sierra Wireless SyncMaster 800TFT

Device: Sierra Wireless SyncMaster 800TFT
Category: CRT Television
Manufacturer: Sierra Wireless
Size: 3.01 MB
Added : 12/23/2013
Number of pages: 54
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Abstracts of contents
Summary of the content on the page No. 1

COLOR MONITOR
SyncMaster 800TFT
(Toshiba Panel)
Manual
SERVICE
COLOR MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignments & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams

Summary of the content on the page No. 2

1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings 1. For continued safety, do not attempt to modify the (READING SHOULD NOT BE ABOVE 0.5mA) circuit board. 2. Disconnect the AC power and DC power jack LEAKAGE before servicing. DEVICE CURRENT UNDER TESTER TEST 1-1-2 Servicing the LCD Monitor TEST ALL EXPOSED METAL SURFACES 1. When servicing the LCD Monitor,

Summary of the content on the page No. 3

1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity may explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. 1-2-1 General Servicing Precautions 1. Always unplug the unit’s AC power cord from

Summary of the content on the page No. 4

2 Product Specifications 2-1 Specifications Item Description LCD Panel TFT-LCD panel, RGB vertical stripe, normally white transmissive, 18-Inch viewable, 0.28 mm pixel pitch Scanning Frequency Horizontal : 30 kHz to 81 kHz (Automatic) Vertical : 56 Hz to 85 Hz (~XGA), 76 Hz (SXGA) Display Colors 16.7 Million colors Maximum Resolution Horizontal : 1280 Pixels @ 81 kHz Vertical : 1024 Pixels @ 76 Hz Input Video Signal Analog, 0.714 Vp-p ± 5% positive at 75 Ω, internally terminated Input Sync

Summary of the content on the page No. 5

2 Product Specifications 2-2 Pin Assignments Sync 15-Pin D-Sub & 13W3 Signal Cable Connector Type 13W3 Separate Composite Sync-on-green Pin No. 1 A1 Red Red Red 2 A2 Green Green Green + H/V Sync 3 A3 Blue Blue Blue 4 4 GND GND GND 5 4 DDC Return (GND) DDC Return (GND) DDC Return (GND) 6 A1-GND GND-R GND-R GND-R 7 A2-GND GND-G GND-G GND-G 8 A3-GND GND-B GND-B GND-B 9 3, 8 No Connection No Connection No Connection 10 10 Self Raster Self Raster Self Raster 11 4 GND GND GND 12 6 Bi-Dr Data (SDA) Bi-

Summary of the content on the page No. 6

2 Product Specifications 2-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. Table 2-1. Timing Chart Mode IBM VESA VGA2/70 Hz VGA3/60 Hz 640/75 Hz 640/85 Hz 800/75 Hz 800/85 Hz 1024/60Hz 1024/75Hz 1024/85Hz 1280/76Hz 1280/75Hz 720 x 400 640 x 480 640 x 480 640 x 480 800 x 600 800 x 600 1024 x 768 1024 x 768 1024x768 1280x1024 1280x1024 Timing fH (kHz) 31.469 31.469 37.500 43.269 46.875 53

Summary of the content on the page No. 7

2 Product Specifications Memo 2-4 SyncMaster 800TFT

Summary of the content on the page No. 8

3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the SyncMaster 800TFT TFT-LCD monitor. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions:1. Disconnect the monitor from the power source before disassembly. 2. Follow these directions carefully; never use metal instruments to pry apart the cabinet. 7. Disconnect the Function PCB wire (10P) 3-

Summary of the content on the page No. 9

3 Disassembly and Reassembly Memo 3-2 SyncMaster 800TFT

Summary of the content on the page No. 10

4 Alignments and Adjustments This section of the service manual explains how to use the DDC JIG to adjust the black, red, green, and blue levels of the FPD when you replace the AD Board, and how to update the microprocessor when you change the Panel or Lamp(s). 4-1 Required Equipment The following equipment is necessary for adjusting the monitor: • Oscilloscope with probe tool R R R • Computer with Windows 95 , Windows 98 , or Windows NT . • DV18AS.exe software • DDC Control JIG 4-2 Using

Summary of the content on the page No. 11

4 Alignments and Adjustments 4-2-1 Main Menu 4-2-2 Sub Menu 4-2-2 (a) Panel Information 4-2-1 (a) Service JIG : DV18 a m l 7 b 1 2 3 4 5 6 c g n h d e i 8 9 10 11 12 13 14 o f j 15 k 16 17 18 Figure 4-3.Service JIG Menu Figure 4-4. Control JIG Menu No Label Definition No Label Definition 1 Red max value Shows the red video signal max value a Monitor On Time Total hours that the monitor has been actively functioning. Green max value Shows the green video signal max value 2 b Panel Cycle The to

Summary of the content on the page No. 12

4 Alignments and Adjustments 4-2-3 (c) When Replacing the Panel 4-2-3 Adjustment Procedures 1. Select the Read Buffer button ( ) to gather the n Use the following procedures whenever you current information about this monitor. replace the AD Board, Panel, or one or both of the 2. Increment the number by clicking on the (+) Lamps. button on the Panel row in the Change No. column. If they were not already 00, the 4-2-3 (a) When Replacing the AD Board numbers for the Upper and Lower Lamps will 1.

Summary of the content on the page No. 13

4 Alignments and Adjustments 4-3 Using the OSD Service function After replacement of the LCD Panel or Lamp(s), use the 800TFT’s OSD Service Function to complete your service. 1. To display the Service Function OSD, push 2. If the Panel has been replaced during this and hold in for 8 seconds the Left and Right servicing, use the Up or Down arrow button arrow buttons on the front panel of the on the front panel to highlight the Panel row on the table. Increment the Change No. value monitor. by pus

Summary of the content on the page No. 14

4 Alignments and Adjustments SyncMaster 800TFT 4-5

Summary of the content on the page No. 15

5 Troubleshooting Notes: 1. Before troubleshooting, set up the PC’s display as below. • Resolution: 1280 x 1024 • H-frequency: 64 kHz • V-frequency: 60 Hz 2. If no picture appears, confirm the power cord is correctly connected. 3. Check the following circuits. • No raster appears: Stand PCB, Main PCB • 12V develop but no screen: Main PCB • 12V does not develop: Main PCB 4. If you push and hold the EXIT button for more than 5 seconds, the monitor automatically reverts back to the factory preset

Summary of the content on the page No. 16

5 Troubleshooting 5-2 No Video Check signal cable and connection. Does the outpus signal appear at RA403 and R411 of IC406? (LDTGB, LVSYNCB, LHSYNCB, LCKBB) 1 2 3 4 Yes Yes Is the output of Pins 1, 17 of IC501 High ? Check TFT-LCD panel and Inverter. No No Check IC501 and related circuit Does the analog video signal appear at R211, No R212, R215? (BLUE, GREEN, RED) Check IC201 and related circuit. (IC201) Yes Check IC201, IC206 and related Does the sync signal appear No circuit. at the outpu

Summary of the content on the page No. 17

5 Troubleshooting WAVEFORMS 1 2 3 4 CH1 RMS = 3.26V CH1 RMS = 3.25V CH1 RMS = 3.12V CH1 RMS = 2.20V 5 6 7 8 CH1 RMS = 4.96V CH1 RMS = 4.42V CH1 RMS = 3.20V CH1 RMS = 3.24V 9 10 CH1 RMS = 2.50V CH1 RMS =960mV SyncMaster 800TFT 5-3

Summary of the content on the page No. 18

5 Troubleshooting 5-3 No OSD WAVEFORMS There is video but no OSD. 11 Does input signal appear No at the Pins 2, 5 and 11 12 13 Check IC405 and related circuit. 10 of IC404? CH1 RMS = 4.18V Yes 12 While pushing a front control No button does any pulse appear Check IC404 and related circuit. at Pin 12 of IC404? Yes CH1 RMS = 3.26V Replace IC404. 13 CH1 RMS = 3.26V 5-4 SyncMaster 800TFT

Summary of the content on the page No. 19

6 Exploded View and Parts List SyncMaster 800TFT 6-1

Summary of the content on the page No. 20

6 Exploded View & Parts List 6-2 SyncMaster 800TFT


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