Connector Locations 5-25
4022-XXX
Engine Board <−> HVPS <−> Toner Cartridge (BCR and Mag. Roll),
Transfer Roller and Detack Saw (2/3)
Signal names for Engine Board <−> HVPS route
Pin numbers and voltage levels for Engine Board <−> HVPS route
Signal Name Explanation
DBAC An off-time variable pulse signal that supplies an oscillation source to generate
ac components for the DB (development bias).
DBDC CON A control signal used to select the DB voltage (0 to 3.3V dc).
CRAC CLK A constant frequency pulse signal that supplies an oscillation source to
generate ac components for the CR.
CRAC A control signal that sets the ac components of the CR to on by degrees.
DTS MON A DTS current monitor signal for NTDVC. (Converted to 0 to 3.3V dc.)
DTS CON A control signal used to select the DTS voltage (0 to 3.3V dc).
TR MON A monitor signal used to select the TR voltage (+) (0 to 3.3V dc).
TR CON A control signal used to select the TR voltage (+) (0 to 3.3V dc).
TR (-) A control signal that sets the TR (-) on and off.
CRDC A control signal that sets the dc components of the CR on and off.
P13 P131 Signal Name
Signal Direction
M: Engine Board,
H: HVPS
Trigger
High
Level
Low
Level
Note
120DBAC M → HClock*0VClock
3 18 DBDC CON M → H Level * 0V Analog
5 16 CRAC CLK M → H Clock * 18V Clock
7 14 CRAC M → H Level 3.3V 0V Digital
813DTS MON M ← H * * 3.3V Analog
10 11 DTS CON M → H Level * 0V Analog
11 10 TR CON M → H Level * 0V Analog
13 8 TR MON M ← H * * 3.3V Analog
15 6 TR (-) M → H Level 0V 24V Analog
16 5 CRDC M → H Level 0V 24V
17 4 3.3V M → H***
18 3 LG M → H***
19 2 24V M → H***
20 1 24V RTN M → H***
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