BenQ 2720S Service Guide - Page 32

Main Flow Chart of Film Scanner

Get BenQ 2720S PDF manuals and user guides View all BenQ 2720S manuals
Add to My Manuals
Save this manual to your list of manuals

Page 32 highlights

5.5.3 CCD/Home Sensor Board There is one connector on the CCD board in 2740S scanner (referring to figure 5-9), the connector description is as following. 2740S CC D PC B CCD J1 Figure 5-9 5.6 Main Flow Chart of Film Scanner Start (power-on) 1. Initial system and CPU parameter 2. Reset components condition 3. Reset communication mode System self test: 1. test ROM 2. test all RAM 3. check scanner motor and position sensor 4. test CCD and lamp 5. test analog processor ICs Check burn-in mode? Yes Burn-in test Initial communication mode Next scan Receiving host command and data Send target message to host "START SCAN" command Calibration Adjust scanning parameters: 1. brightness 2. contrast 3. shadow-highlight 4. gamma correction 5. multi bit and single bit 6. window mode 7. line art and halftone 8. scalling and resolution 9. matrix operation Send scanned data (* control scanning timing and handshaking timing *) End of scan Next scan Stop (power-off) Figure 5-10 Main Flow Chart of Film Scanner 5-10 API Confidential No Copy/Reproduction allowed Electrical Systems

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
5.5.3 CCD/Home Sensor Board
There is one connector on the CCD board in 2740S scanner (referring to
figure 5-9), the connector description is as following.
2740S C C D P C B
J1
CCD
Figure 5-9
5.6 Main Flow Chart of Film Scanner
Start (power-on)
1. Initial system and CPU parameter
2. Reset components condition
3. Reset communication mode
System self test:
1. test ROM
2. test all RAM
3. check scanner motor and
position sensor
4. test CCD and lamp
5. test analog processor ICs
Check burn-in mode?
Yes
Burn-in test
Initial communication mode
Receiving host command and data
Send target message to host
"START SCAN" command
Calibration
Adjust scanning parameters:
1. brightness
2. contrast
3. shadow-highlight
4. gamma correction
5. multi bit and single bit
6. window mode
7. line art and halftone
8. scalling and resolution
9. matrix operation
Send scanned data
(* control scanning timing and
handshaking timing *)
End of scan
Next scan
Next scan
Stop (power-off)
Figure 5-10 Main Flow Chart of Film Scanner
5-10
API Confidential
Electrical Systems
No Copy/Reproduction allowed