Gestetner G060 Service Manual page 989

3.3.2 SCANNING.......................................................................................3-2
Scanner sub-scan magnification ...........................................................3-2
Scanner leading edge and side-to-side registration..............................3-2
Main scan dot position correction .........................................................3-3
3.3.3 ARDF................................................................................................3-4
ARDF side-to-side and leading edge registration .................................3-4
3.3.4 PRINTER GAMMA CORRECTION ..................................................3-5
Printer Mode .........................................................................................3-5
Copy Mode ...........................................................................................3-7
3.4 REPLACEMENT......................................................................................3-10
3.4.1 EXPOSURE GLASS.......................................................................3-10
3.4.2 ORIGINAL LENGTH/WIDTH SENSOR ..........................................3-10
3.4.3 SENSOR BOARD UNIT (SBU).......................................................3-11
3.4.4 EXPOSURE LAMP STABILIZER ...................................................3-12
3.4.5 XENON LAMP ................................................................................3-12
3.4.6 SCANNER POWER SUPPLY UNIT (PSU) ....................................3-14
3.4.7 SCANNER MOTOR........................................................................3-14
3.4.8 FRONT SCANNER WIRE ..............................................................3-15
3.4.9 REAR SCANNER WIRE.................................................................3-18
3.4.10 NVRAM REPLACEMENT PROCEDURE .....................................3-20
NVRAM on the Controller (IC9) ..........................................................3-20
NVRAM Expansion Board on the Controller (CN13)...........................3-20
NVRAM on the BCU (IC20) ................................................................3-21
3.4.11 REQUIRED ACTIONS WHEN REPLACING ITEMS ....................3-22
3.5 PRINTER ENGINE ..................................................................................3-23
3.5.1 TONER SUPPLY UNIT...................................................................3-23
Preparation .........................................................................................3-23
M Toner Supply Unit ...........................................................................3-23
K, C, and Y Toner Supply Units ..........................................................3-27
3.5.2 BCU ................................................................................................3-28
DIP switch settings..............................................................................3-29
3.6 OTHERS .................................................................................................3-30
3.6.1 TOUCH PANEL POSITION ADJUSTMENT ...................................3-30
3.6.2 G367 TO G570 MODIFICATION ....................................................3-31
4. TROUBLESHOOTING ................................................................. 4-1
4.1 PROCESS CONTROL ERROR CONDITIONS .........................................4-1
4.1.1 DEVELOPER INITIALIZATION RESULT .........................................4-1
4.1.2 PROCESS CONTROL SELF-CHECK RESULT ...............................4-3
4.1.3 LINE POSITION ADJUSTMENT RESULT .......................................4-4
4.2 SCANNER TEST MODE ...........................................................................4-7
4.2.1 VPU TEST MODE ............................................................................4-7
SP4-907-1 VPU Test Pattern: R ..........................................................4-7
SP4-907-2 VPU Test Pattern: G ..........................................................4-7
SP4-907-3 VPU Test Pattern: B ..........................................................4-7
4.2.2 IPU TEST MODE..............................................................................4-8
SP4-904-1 Register Write/Read Check Result ....................................4-8
SP4-904-2 Image Path Check Result ...................................................4-8
4.3 SERVICE CALL CONDITIONS .................................................................4-9
SM xiii
Rev. 07/2003
G060