ViewSonic Vx2235wm 5 Service Manual

							
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7. Boot code of ISP
 
7.1 Hardware ISP 
(1) Without boot code 
(2) Fixed security code: 94, 94, AC, CA, 53 
(3) Attention to the pin of HSCL (1) and HSDA (1) should keep in enable 
(4) MTV412M, MTV512M, CS8954 support hardware ISP 
 
7.2 Software ISP  (1) With boot code 
(2) User define the security code 
(3) Attention to the pin of HSCL (1) and HSDA (1) should keep in enable 
(4) Only software ISP could read the MCU content 
(5) MTV212M, MTV312M, MTV230M, MTV412M,  MTV512M, CS8954 support software ISP 
 
7.3 Boot code of software ISP  (1) Initialize MCU 
(a) Define the I/O pin to HSCL (1) and HSDA (1) 
(b) Define the slave B address 
(c) Enable 8051 INT1 (ISR 2) 
(2) Coding for INT1 while get into ISP mode  (a) Clear watchdog to prevent reset during ISP period 
(b) Disable all interrupt to prevent CPU wake-up 
(c) Write ISP slave address 
(d) Write 93h to ISP enable address to enable ISP 
(e) Enter 8051 idle mode 
  
						

							
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7.4 The followings show the relationship between the code and the security code. 
 
 
 
 
  
						

							
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8. ISP Adaptor Schematic 
 
 
 
 
 
9. Adaptor Linking 
 
 
 
 
 
The Monitor SetConnect with 
Printer Cable  
25Pins to 25Pins
PC/HOST 
Connect with 
VGA Cable  ISP Adaptor
  
						

							
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C. Packing For Shipping And Disassembly Procedure 
Packing For Shipping 
1. Packing Procedure 
 
1.1  Paste protection film to protect the monitor. (Figure 1) 
1.2  
Put the monitor in the PE bag and seal the bag with tape. (Figure 2) 
 
 
 
 
 
 
 
 
 
 
 
 
1.3  Put the cushion into the car ton then place the monitor on the cushion. (Figure 3) 
1.4  Put the cushion then place the  seat assy and all the accessories into the carton. As last, 
close the carton and seal it with tape. (Figure 4) 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 1 Figure 2 
Figure 3 Figure 4  
						

							
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Monitor Assembly and Disassembly  
1 Separate Stand Assy 
1.1 Remove Stand Cover  
Step 2 : 
Remove the Stand Cover. 
Step 5 : 
Completed. 
Step 3 : 
Loose and remove 4 screws 
Step 1 : 
Remove the Seat Assy 
Step4 : 
Remove the Stand Assy  
						

							
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2 Separate Rear Cover (Rear Case Assy) 
     Separate Bezel hooks to take Bezel and Rear Cover apart.  
Step 1 : 
Loose and remove 2 screws. 
Step 2 : 
Separate Bezel hooks to take  
Bezel and Rear Cover apart. 
Step 3 : 
Remove Rear Cover. 
Step 4 : 
Completed.  
						

							
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3 Remove Power Board and AD Board 
3.1 Remove Metal Cover 
Step 1 : 
Remove FFC from OSD Board. 
Step 2 : 
Loose and remove 4 screws. 
Step 4 : 
Remove 2 pieces of Backlight wires. 
Step 3 : 
Lift up LCD module and remove bezel. 
 
Step 5 : 
Remove 2 pieces of Backlight wires.  
						

							
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Step 6 : 
Loose and remove 2 screws. 
Step 7 : 
Loose and remove 2 screws. 
Step 8 : 
Loose and remove 4 screws. 
Step 9 : 
Remove the PCBA Cover  
						

							
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3.2 Remove Power Board and AD Board 
Step 1 : 
Loose and remove 4 screws. 
Step 2 : 
Remove Lips Board 
Step 3 : 
Remove 2 pieces of FFCs.  
Step 4 : 
Remove the FFC.  
Step 5 : 
Loose and remove 4 screws.  
						

							
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4 Change New AD Board and Power Board 
Step 1 : 
Place new AD Board. 
And fasten 4 fixed screws. 
Step 3 :  
Insert FFC. 
Step7 : 
Completed. 
Step 4 : 
Insert 2 pieces of FFCs . 
 
Step 6 : 
Remove AD PCBA. 
Step 2 : 
Fasten 4 fixed screws.