![background image](http://html.mh-extra.com/html/viewsonic/vp2650wb-26-lcd-monitor/vp2650wb-26-lcd-monitor_service-manual_1021379039.webp)
ViewSonic Corporation
Confidential - Do Not Copy
VP2650wb-1
36
<Note A>
Byte4 (cksum) = Byte1 + Byte2 + Byte3
<Note B>
Data = The value write to MCU or EEPROM
<Note C>
XX = don't care, any value (<=0xFF).
<Note D>
When PC Host sends 0x7D command to MCU, MCU must return as following (2
bytes)
Return Code
R-Byte1
R-Byte2
Checksum error code
FC
AA
Normal return code
the above Byte3 (/data)
FC
If normal return code is exact FCh
FC
CF
<Note E>
DDC/CI command IIC command
Command code for DDC/CI mode change to IIC alignment mode
Byte1
Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
0x6E 0x51 0x84
0x03 0xff 0x00 0x00
checksum
Description:
1. For DDC/CI supported model, its default IIC slave address is set to 0x6E, not 0x7C. So the
above command words must be issued before doing IIC alignment procedure. It is to inform
MCU that change IIC slave address from 0x6E to 0x7C.
Where Byte8 (checksum) = Byte1 xor Byte2 xor … xor Byte7
2. EEPROM mapping
Summary of Contents for VP2650WB - 26" LCD Monitor
Page 42: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 39 Step4 Step 5 Step 6 ...
Page 43: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 40 Step 7 Step 8 Step 9 ...
Page 44: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 41 Step 10 Step 11 ...
Page 51: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 48 4 Packing procedure ...
Page 53: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 50 6 Troubleshooting Flow Chart ...
Page 54: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 51 ...
Page 55: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 52 ...
Page 56: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 53 5 Power no work troubleshooting ...
Page 57: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 54 Power no PFC troubleshooting ...
Page 58: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 55 6 Transmitter Board ...
Page 76: ...9 PCB Layout Diagrams ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 73 ...
Page 77: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 74 ...
Page 78: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 75 ...
Page 79: ...ViewSonic Corporation Confidential Do Not Copy VP2650wb 1 76 ...