Kodak X-Omat 460 Service Manual
ROUGH DRAFT
THEORY GUIDE
for the
Publication No. Preliminary
10/8/90
Kodak X-Omat
M6RA PROCESSOR
H108_0003DA
PLEASE NOTE
The information contained herein is based on the experience and knowledge relating to the subject matter gained by
Eastman Kodak Company prior to publication.
No patent license is granted by this information.
Eastman Kodak Company reserves the right to change this information without notice, and makes no warranty, express
or implied, with respect to this information. Kodak shall not be liable for any loss or damage, including consequential or
special damages, resulting from the use of this information, even if loss or damage is caused by Kodak’s negligence or
other fault.
This equipment includes parts and assemblies sensitive to damage from electrostatic discharge. Use
caution to prevent damage during all service procedures.
Table of Contents
Description Page
2 Preliminary
Developer Temperature Control R3, has an internal overtemperature THERMOSTAT.
If recirculation is lost, the internal THERMOSTAT in
When the GPMC (500 Board) senses that both the
DEVELOPER and FIXER PROBES are submerged
in solution (reduced resistance), RELAY K503 is
energized, thus applying line AC voltage across B5,
the RECIRCULATION PUMP. Both the DEVELOPER
LEVEL PROBE and the DEVELOPER
THERMISTOR, R3, are looked at by the 500 Board.
K504 is used as an enable for the DEVELOPER
HEATER. K503 turns on the RECIRCULATION
PUMP. Due to the changes in resistance of R3,
SSRU2 is turned on and off at varying rates to
R3 will open. The 500 Board also controls the
WASH WATER SOLENOID, L1, and the
DEVELOPER COOLING SOLENOID, L2. In the
event that developer temperature goes .5°F above
set temperature, it opens the DEVELOPER
COOLING SOLENOID which is in the DRAIN of the
WASH TANK. It also turns on WASH WATER
SOLENOID, L1. The rate of L1 is 1.5 gallons per
minute; the rate of L2 is 1.2 gallons per minute; and
the DRAIN is routed through the cooling loop at the
bottom of the DEVELOPER TANK.
control the temperature. The DEVELOPER HEATER,
BLOCK DIAGRAM
DEVELOPER TEMPERATURE CONTROL
R6
DEVELOPER
THERMISTER
DEV.
LEVEL
PROBE
FIXER
LEVEL
PROBE
500
BOARD
MICROPROCESSOR
K503
(DS3)
K504
(DS4)
CONTROL
L2 L1
SSR
U2
RECIRC
PUMP
B5
WASH
WATER
SOLENOID
L1
COOLING
DUMP
SOLENOID
L2
DEVELOPER
HEATER
HR-3
L1
L1
L2
AC
DC
QUAD
POWER
SUPPLY
H108_9003DC
Preliminary 3
Fixer Temperature Control thermistor is R4. The 500 Board senses the
variations in resistance. K503 is the enable. The
Resistance, or R4, is sensed by the GPMC (500
Board) and is used to control SSRU2. K504 enables
the DEVELOPER HEATER. SSRU2 controls the
DEVELOPER HEATER. K503 turns on the
RECIRCULATING PUMP, B5. So we have a very
large swing — plus 15°F, minus 10°F — and is
variations are used to control SOLID STATE RELAY
U5. The FIXER HEATER is R4. FIXER HEATER
R4 has an internal overtemperature THERMOSTAT
that in the event of loss of recirculation, it will open.
The 500 Board also turns on K503 which turns on
the RECIRCULATION PUMP, B5.
normally controlled at 90°for all cycles. The
BLOCK DIAGRAM
FIXER TEMPERATURE CONTROL
500
R-4
FIXER
THERMISTER
BOARD
MICROPROCESSOR
K503
(DS3)
L2 L1
RECIRC
PUMP
B5
L1
L2
FIXER
LEVEL
PROBE
DEV.
LEVEL
PROBE
AC
DC
QUAD
POWER
SUPPLY
K504
(DS4)
L2
CONTROL
FIXER
SSR
U5
FIXER
HEATER
R-4
L1
H108_9004DC
4 Preliminary
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