Gestetner G060 Service Manual page 31

5.6.1 SOFTWARE RESET...................................................................... 5-84
5.6.2 SYSTEM SETTINGS AND COPY SETTING RESET .................... 5-84
System Setting Reset......................................................................... 5-84
Copier Setting Reset .......................................................................... 5-85
5.7 FIRMWARE UPDATE PROCEDURE ..................................................... 5-86
5.7.1 TYPE OF FIRMWARE ................................................................... 5-86
5.7.2 ERROR RECOVERY..................................................................... 5-86
5.7.3 FIRMWARE UPGRADE................................................................. 5-87
5.8 CONTROLLER SELF-DIAGNOSTICS.................................................... 5-89
5.8.1 OVERVIEW ................................................................................... 5-89
5.8.2 DETAILED SELF-DIAGNOSTICS.................................................. 5-90
Executing Detailed Self-Diagnosis ..................................................... 5-90
5.9 USER PROGRAM MODE....................................................................... 5-91
5.9.1 HOW TO USE UP MODE .............................................................. 5-91
UP Mode Initial Screen: User Tools/Counter Display......................... 5-91
System Settings ................................................................................. 5-91
Copier/Document Server Features..................................................... 5-92
Printer, Facsimile, Scanner Settings .................................................. 5-92
Counter .............................................................................................. 5-93
Maintenance ...................................................................................... 5-93
5.10 DIP SWITCHES.................................................................................... 5-94
Controller Board ................................................................................. 5-94
BCU Board ......................................................................................... 5-94
6. DETAILED DESCRIPTIONS ....................................................... 6-1
6.1 SCANNING............................................................................................... 6-1
6.1.1 OVERVIEW ..................................................................................... 6-1
6.1.2 SCANNER DRIVE ........................................................................... 6-2
6.1.3 ORIGINAL SIZE DETECTION ......................................................... 6-3
6.1.4 OTHERS .......................................................................................... 6-5
DC Power Supply................................................................................. 6-5
Anti-Condensation Heater.................................................................... 6-5
6.2 IMAGE PROCESSING ............................................................................. 6-6
6.2.1 OVERVIEW ..................................................................................... 6-6
6.2.2 SBU BLOCK DIAGRAM................................................................... 6-7
Signal Processing ................................................................................ 6-7
A/D Conversion .................................................................................... 6-7
White Level Correction:........................................................................ 6-7
Others .................................................................................................. 6-7
Black Level Correction ......................................................................... 6-8
Adjustments ......................................................................................... 6-8
VPU Test Mode.................................................................................... 6-8
6.2.3 IPU BLOCK DIAGRAM .................................................................... 6-9
Shading Correction .............................................................................. 6-9
Picture Element (Dot Position) Correction.......................................... 6-10
Scan Line Correction.......................................................................... 6-10
Image Separation............................................................................... 6-10
Scanner Gamma Correction (RGB Gamma Correction) .................... 6-11
SM xv G060