Xerox ColorQube 9303 Series, Service Manual

Page: 1710 / 1812

February 2013
8-16 ColorQube® 9303 Family
Principles of Operation
Control Signal Descriptions
Each power supply control signals is defined in Table 5
+17 V N/A, limited by 3V3/24V
OVP 4 A
+24 V +30 V 16 A
+50 V +54 V 12 A for 1 second max, and 20 A for 200ms max
-50 V -54 V 6 A
Table 5 Power supply information
Signal Name Description
115V Drum Relay Enable A 3.3V high level activates the drum heater relays for paral-
lel operation. A low level disconnects the drum heater con-
nections.
230V Drum Relay Enable A 3.3V high level activates the drum heater relays for series
operation. A low level disconnects the drum heater connec-
tions.
Finisher Relay Enable A 3.3V high level activates the relay to connect the finisher
output to neutral and line. A low level disconnects both neu-
tral and line.
Common Heater Relay Enable A 3.3V high level activates the relays to connect the marking
unit (J4AC) heaters’ to neutral and line It also activates the
relays controlled by the Heater2 On signal. A low level dis-
connects both neutral and line. This signal disconnects the
power to the marking unit, in case of thermal run-away.
Heater2 On A 3.3V TTL high level activates the relays to connect the AC
Outputs (other than to J4AC) to Line. A low level deactivates
these relays.
130kHz Clock A 3.3V TTL 130kHz clock signal is input to the power supply.
This signal must be low or clocked. It cannot be held high for
any period of time.
Data In A 3.3V 130kHz data signal is input to the power supply. this
signal directly drives an opto coupler in the power supply, so
it will not be at TTL levels. This signal carries heater request
data to the power supply.
Data Out A 3.3V TTL signal is output from the power supply. This sig-
nal is transmitted via an optically isolated data path from the
power supply triac PLD. This signal contains zero cross tim-
ing, line current, and line voltage information.
Drum Motor Inverter Enable A 3.3V TTL high level signal is input to enable the drum
motor inverter. A low level disables the inverter by opening
all inverter transistors. This signal is optically isolated from
the drum motor inverter.
Inverter Phase U Control A 3.3V TTL signal is input to control the inverter phase U
half-bridge. This signal is optically isolated.
Table 4 Over voltage and current limits
DC Voltage Shutdown Voltage Shutdown Current
Inverter Phase V Control As phase U, but controls the phase V half-bridge of the drum
motor inverter.
Inverter Phase W Control As phase U, but controls the phase W half-bridge of the
drum motor inverter.
Drum Motor CS+ A differential current is output between this signal and drum
Motor CS-. This current is proportional to drum motor phase
at a ratio of 1:100.
Drum Motor CS- As CS+
24V Active A 3.3V TTL-compatible high-level signal is output to indicate
that the +24V, 12V, and 5V outputs are active. A low-level
signal indicates these outputs are disabled (due to 24V
Enable in low state, over voltage or over current on the
+24V, 12V, or +5V outputs).
50V Active A 3.3V TTL-compatible high-level signal is output to indicate
the 50V outputs are active. A low-level signal indicates these
outputs are disabled (due to 50V Enable in low state, 24V
Enable in low state, over voltage or over current on the 50V,
+24V, 12V, or +5V outputs).
Power Fail A 3.3V TTL-compatible low-level signal is output from the
power supply to indicate that a limited amount of time
remains before loss of 3.3V ESTAR and 17V regulation,
based on the DC link voltage. An open state indicates that
supply operation should continue indefinitely.
24V Enable A 3.3V TTL low-level signal low-level signal disables 50V,
+24V, 12V, and +5V outputs. A high level enables the +24V,
12V, and +5V outputs.
50V Enable A 3.3V TTL low-level signal disables 50V outputs. A high
level enables these outputs.
Analog Power Gauge 50 This analog output indicates the 50V output power at
approximately 400 watts/volt, 5%, with a source impedance
of 20 k ohms. The power supply outputs at least 2.2V when
output is within 5% of shutdown (this signals the printer to
reduce power consumption to prevent shutdown).
Analog Power Gauge 24 This analog output indicates the +24V, 12V, and 5V output
power at approximately 400 watts/volt, 5%, with a source
impedance of 20 K ohms. The power supply outputs at least
2.2V when the power output is within 5% of shutdown (this
signals the printer to reduce power consumption to prevent
shutdown).
3V3 Remote Volt Sense This analog input is connected to the IME Controller Board
to remotely sense 3.3V ESTAR voltage. The power supply
operates with an open sense line.
3V3 Remote Ground Sense This analog input is connected to the IME Controller Board
to remotely sense ground. The power supply operates with
an open sense line.
Table 5 Power supply information
Signal Name Description