Gestetner B130 Service Manual page 18

6.4 PAPER PATH (B129/B130/B168/B169) .....................................................6-7
6.5 DRIVE LAYOUT (B129/B130/B168/B169)..................................................6-8
6.6 BLOCK DIAGRAM: PCBS AND COMPONENTS (B044/B045/B046) ........6-9
6.7 MAIN PCBS (B044/B045/B046) ...............................................................6-12
6.7.1 FCU (FUNCTION/FACSIMILE CONTROL UNIT)............................6-12
6.8 BLOCK DIAGRAM: PCBS AND COMPONENTS
(B129/B130/B168/B169)...........................................................................6-13
6.8.1 SBU (SENSOR BOARD UNIT) .......................................................6-14
Buffer ..................................................................................................6-14
CCD ....................................................................................................6-14
Amplifier..............................................................................................6-14
6.8.2 NCU (NETWORK CONTROL UNIT) ...............................................6-15
North America version ..........................................................................6-15
Europe/Asia version .............................................................................6-15
6.9 COPY PROCESS OVERVIEW.................................................................6-16
6.10 SCANNING.............................................................................................6-18
6.10.1 OVERVIEW ...................................................................................6-18
6.10.2 SCANNER DRIVE .........................................................................6-19
6.11 IMAGE PROCESSING ...........................................................................6-20
6.11.1 OVERVIEW ...................................................................................6-20
6.11.2 IMAGE PROCESSING PATH (B044/B045/B046) .........................6-21
6.11.3 ORIGINAL MODES .......................................................................6-22
Original Modes: Copying....................................................................6-23
6.11.4 IMAGE PROCESSING STEPS FOR EACH MODE
(B044/B045/B046) .........................................................................6-24
6.11.5 IMAGE PROCESSING STEPS FOR EACH MODE
(B129/B130/B168/B169) ................................................................6-25
6.11.6 MODE ADJUSTMENTS ................................................................6-26
To customize... ...................................................................................6-26
Default plotter customization settings for each mode..........................6-27
6.12 LASER EXPOSURE...............................................................................6-28
6.12.1 OVERVIEW ...................................................................................6-28
6.12.2 LD SAFETY SWITCHES (B044/B045/B046).................................6-29
6.13 LD SAFETY SWITCHES (B129/B130/B168/B169) ................................6-30
6.14 PHOTOCONDUCTOR UNIT (PCU) .......................................................6-31
6.14.1 OVERVIEW ...................................................................................6-31
6.14.2 DRUM DRIVE ................................................................................6-32
6.15 DRUM CHARGE ....................................................................................6-33
6.15.1 OVERVIEW ...................................................................................6-33
6.15.2 CHARGE ROLLER VOLTAGE CORRECTION .............................6-34
Correction for Ambient Environment ...................................................6-34
6.15.3 CHARGE ROLLER CLEANING.....................................................6-35
6.15.4 DETECTION OF A NEW PCU.......................................................6-36
At time of copier installation ................................................................6-36
When a replacement PCU is installed.................................................6-36
6.16 DEVELOPMENT ....................................................................................6-37
6.16.1 OVERVIEW ...................................................................................6-37
6.16.2 DEVELOPMENT BIAS ..................................................................6-38
B129 Series/B044 Series
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