Air Techniques A/T2000 XR User manual

AUTOMATIC FILM PROCESSOR
SERVICE MANUAL

2
TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Plumbing Connections - Option 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Plumbing Connections - Option 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Plumbing Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Water Recirculation Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Major Assemblies and Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Internal Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Operator Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Function Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Measuring Replenisher Dispensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Electrical Diagrams and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Section 1 Operation and Function Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 23
Section 2 Film Quality Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Avoiding Chemistry Contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Cover Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Base Assembly - Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Base Assembly - Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Base Assembly - Drive Block Assembly, P/N 45270 . . . . . . . . . . . . . . . . . . . . . 44
Base Assembly - Solenoid, P/N 43980 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Base Assembly - Heater Pad, P/N 45950 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Base Assembly - Internal Water Recirculation . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Roller Transports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Roller Transport Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Maintenance - Weekly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Maintenance - Monthly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Maintenance - Quarterly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Daylight Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

3
Purpose
This document provides the instructions necessary to perform repair and maintenance of the
AT2000 XR Automatic Film Processor. It is intended for all recognizable field servicing of the
unit and includes procedures to disassemble the unit to access internal components as well
as steps necessary to perform preventive maintenance, inspection, cleaning, troubleshooting
and removal/replacement of defective parts.
This manual is not intended for the routine use of the AT2000 XR Film Processor. Refer to
the Operator's Manual shipped with the product for all processor operation. It is further
understood that repair and maintenance information provided herein is to be performed by a
trained servicing technician.
Power Removal
Prior to performing the procedures contained in this document, turn off power switch by placing
the rocker switch on the top of the unit to the OFF (0) position. Also disconnect the line cord
from the wall outlet and the communication cable from the Scanner.
Warnings and Caution Statements
In these instructions, the following definitions Apply for all WARNINGS and CAUTION
Statements:
Warnings: Any operation, procedure or practice, which, if not strictly observed, may result in injury
or long term health hazards to personnel or patients.
CAUTIONS: Any operation, procedure or practice, which, if not strictly observed, may result in
destruction of equipment or loss of treatment effectiveness.
Task Guidelines
Personnel performing maintenance and repair tasks contained in this manual should follow
standard industry guidelines for working on electronic equipment as necessary. These
include the following:
qAlways use a clean well-lit work area with ample space required for the size of the job.
qAlways make sure to protect finished surfaces from scratches or other damage by
using cushioning material such as a soft cloth or packaging material between the
finished surfaces and the area that may cause damage.
qKeep all attaching hardware and fastening screws together with the associated
removed assembly. If necessary use separate storage containers or envelopes for
each hardware group.
qPrior to removing any part or assembly, note location and orientation of assemblies
being removed.
qTag wires and associated mating connectors before disconnecting.
qUse care when disconnecting mating connectors so as not to damage the connector
keys and connection to the associated printed circuit board, wire or cable.
qBe aware of the damage impact of electrostatic discharge (ESD) on electronic devices
and use ESD precautions when handling printed circuit boards and wiring comprising
the Scanner.
INTRODUCTION

4
PRODUCT OVERVIEW
IEC
CONNECTOR
(At Rear)
POWER
SWITCH
ADJUST
SET-TEMP
FILM INLET
WITH
ACTIVATING
SHUTTER
FILM
RECEPTACLE
TRAY DIVIDERS
OPERATOR
CONTROLS
LEVELING
FOOT
LEVELING
BASE
BUBBLE
LEVEL REPLENISHMENT
PUMP AND AGITATOR
MOTOR DRAW
LEVELING
FOOT

5
ELECTRICAL 115VAC, 60 Hz, 8 AMPS. Use a 15 AMP, 3 prong, grounded out-
let. A separate dedicated 15 AMP line is recommended.
WATER FLOW 1/2 gallon per minute water flow (while processing film).
WATER PRESSURE 80 PSI maximum / 30 PSI minimum. Water source must have a
manual shut-off near processor.
WATER CONNECTION Valved 3/4" male garden hose fitting near rear of processor. 6'
hose with standard female garden hose fittings provided.
WATER BACKFLOW
PREVENTION
A vacuum breaker is not normally required because the proces-
sor has a 1" air gap between water supply inlet and the maximum
possible water level height.
WATER TEMP 55° F (13° C) to 80° F (27° C)
DRAIN 1-1/2" vertical PVC standpipe, open at top. DO NOT DRAIN INTO
COPPER OR BRASS. The top of the standpipe must be 6" below
the bottom of the countertop.
DIMENSIONS 18" (H) x 15" (W) x 25" (D) with leveling base.
WEIGHT 90 lbs. with water and chemistry (75 lbs. empty).
VENTILATION Room air temperature must be below 80° F (27° C), during pro-
cessing. Because heat is generated during processing, adequate
ventilation is required to maintain darkroom temperature. 8 - 12
volume room air changes per hour.
SPECIFICATIONS
DIMENSIOND

6
PLUMBING CONNECTIONS - OPTION 1
Chemistry recovery and wash water sewer disposal connection.
(If permitted by local code.)

7
PLUMBING CONNECTIONS - OPTION 2
Chemistry recovery and wash water sewer disposal connection.
(If permitted by local code.)

8
PLUMBING CONNECTIONS
CONNECT TO PLUMBING
(See Plumbing Connections - OPTIONS 1 & 2)
qMatch color-coded drain hoses to corresponding color-coded label on barbed fittings
at the rear of the unit. Mount the hose end onto the barbed fitting by rotating the hose
clockwise while pushing. Push the hose flush up against the barbed fitting, leaving no
space. If removal of the hose is necessary, rotate clockwise while pulling the hose. No
clamps are required as the hose is self clamping.
qIf routing the drain lines, replenishment lines and water inlet hose through the counter-
top, drill a 2-1/2" diameter hole through the countertop (See Plumbing Connection
illustrations). For routing replenishment lines through the counter, unscrew the retain-
ing nut under cap to remove the cap assembly. Cut the replenishment lines to appro-
priate length.
OPTION 1: Route water (white) drain hose to a vertical 1-1/2" PVC standpipe. Route
Developer (black) and Fixer (red) drain hoses to chemistry recovery con-
tainers under the counter.
OPTION 2: Route all three drain hoses into a vertical 1-1/2" PVC standpipe.
NOTE: Hoses must always slope downward to drain pipe or recovery containers without any "U's"
or upward bends in the hose.
Hoses routed into the drain pipe must be cut so that the ends are at a min. 6" above the
standing water in the P-trap at the bottom of the pipe.
Hoses routed into the chemistry recovery containers must be cut so that the ends are 2"
above the highest expected solution level in the recovery container.
qChemistry recovery & replenishment bottles must be placed below the processor or
under the counter.
REPLENISHER BOTTLES CANNOT BE ABOVE THE PROCESSOR.

9
WATER RECIRCULATION OPTION
PLUMBING CONNECTIONS
1. Fill the container with fresh water to the bottom of the WATER label.
2. Cut the wash water drain hose so that when it is inserted into the water container it reaches
to the bottom of the WATER label. Insert the hose into the container.
3. Insert the wash water inlet hose all the way to the bottom of the water container. See the
illustration below for the correct installation.
WARNING: THIS PLUMBING CONFIGURATION CANNOT BE CONNECTED TO A FRESH
WATER SUPPLY LINE.

10
MAJOR ASSEMBLIES AND PARTS
ITEM DESCRIPTION PART NUMBER
1Cover Assembly with Electronic Module 45800
2Base Assembly 45200
3Developer Transport 45500
4Fixer Transport 45505
5Wash/ Dry Transport 45510
6Leveling Base Assembly 45100
7Leveling Feet 43106

11
INTERNAL PARTS IDENTIFICATION
PROCESSOR
COVER
ELECTRICAL
CABLE
PROCESSOR
COVER
P/N 45800
ACTIVATING
SHUTTER
DEVELOPER
RACK (BLACK)
P/N 45500
FIXER RACK
(RED)
P/N 45505
WASH/DRY RACK
P/N 45510
DEVELOPER
DRAIN TUBE
(BLACK)
P/N 43286
FIXER DRAIN
TUBE (RED)
P/N 43287
WASH/DRY
DRAIN TUBE
P/N 43270
FIXER
TANK
RUBBER
WASHER
P/N 43271
FILL LINE
DEVELOPER
TANK
FILM
INLET
P/N 45567
WASH
TANK
BUBBLE
LEVEL
LEVELING
FEET
P/N 43106
LEVELING
BASE
P/N 45100
WEEP HOLE
INNER BAFFLE
P/N 41307
OUTER BAFFLE
P/N 43526
BAFFLE PLATES
ON LEFT END BOTTOM OF
BAFFLE MUST PASS BELOW
RAISED BOSS ON SIDE PLATE
RAISED BOSS
WORM
DRIVESHAFT
P/N 43242
DEVELOPER
RACK LATCH
P/N43254
SAFETY SWITCH ACTIVATOR P/N 45323
THERMISTOR PROBE P/N 45790
FIXER RACK
LATCH
P/N 43255
WASH/DRY
RACK
LATCHES
P/N 43256
GEAR COVER
P/N 43258
DRIVE BLOCK ASS’Y
P/N 45240
WATER
LEVEL
SENSOR
P/N 45450

12
OPERATOR CONTROLS
INDICATOR LIGHTS
POWER
Illuminates when the POWER switch (located on top)
is in the ON position.
READY
Illuminates when chemistry has reached SET-TEMP
operating temperature (factory Pre-set at 82° F (28°
C). When READY illuminates, chemistry is at the
proper temperature to process films.
PROCESSING
Illuminates when a film has been inserted and is being
transported through the process cycle.PROCESSING
flashes regularly when the film is feeding past the film
inlet shutter and for 5 seconds after the shutter closes.
When processing extraoral films, wait until PROCESSING stops flashing before inserting the
next film to prevent films from overlaping. When the processor is in a stand - by mode, ready
to accept films for processing, the PROCESSING light will not be illuminated. When the
CLEANING MODE is selected, the PROCESSING light flashes (short - long...)
IMPORTANT: ENDO is intended to process a single periapical size film, and by default, if anoth-
er film is attempted to process after the shutter closes from the 1st film, the
process cycle will change to NORMAL Mode.
KEY PADS
ENDO SPEED
The arrow indicator to the left of the keypad flashes when the A/T 2000XR is in the ENDO
SPEED mode. Film is processed in 2-1/2 minutes.
NORMAL SPEED
The arrow indicator to the left of the keypad illuminates steady when the A/T 2000XR is
in the NORMAL mode. Film is processed in 5-1/2 minutes.
DISPLAY SET - TEMP
The selected chemistry set point temperature flashes on the TEMPERATURE display when
the keypad is pressed and held. Otherwise, the TEMPERATURE display indicates actual
chemistry temperature. If the keypad is pressed and the display does not flash a different
value, the set point and actual chemistry temperatures are the same and READY is illumi-
nated. If this is not the case, see TROUBLE SHOOTING or contact your authorized Air
Techniques Dealer. The SET - TEMP is factory pre-set at 82° F (28° C).
CLEANING MODE
Use this keypad only during cleaning procedures. CLEANING MODE activates an extended
10 minute process cycle. PROCESSING indicator light flashes (short - long...) when in this
mode.
The following provides a brief summary description of the operating controls of the AT2000
XR Film Processor. Refer to the Operator's Manual shipped with the product for detailed
operation informaion for the AT2000 XR Film Processor.

13
FUNCTION CHARTS
AT2000 XR FUNCTION & OPERATION CHARTS
The AT2000 XR Film Processor's function and status conditions, as designed, are separated
into six categories listed below. The charts associated will provide insite to required processor
operation and expedite any trouble-shooting, if applicable. Refer to the appropriate Function
Chart, as required, to quickly identify and resolve the issue at hand.
qFILM SHUTTER FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
qFUNCTIONAL MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
qCHEMISTRY HEATER ABNORMAL CONDITIONS AND PROTECTION . . . .15
qTRAILING-EDGE TO TRAILING-EDGE FILM TIMES . . . . . . . . . . . . . . . . . . .15
qHEATER PAD POWER CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
qREPLENISHER RATES FOR DEVELOPER AND FIXER . . . . . . . . . . . . . . . .17
qMEASURING REPLENISHER DISPENSING . . . . . . . . . . . . . . . . . . . . . . . . .18
PROCESSING STATE SHUTTER STATE MODE (Speed) CHANGE
or RESULT
Stand By CLOSED NORMAL to ENDO to NORMAL
Stand By
CLOSED,
then OPEN for
4 seconds or more
Process starts, then stops at shutter closed and
stays in selected mode.
Stand By
CLOSED,
then OPEN for
4 seconds or more
Process starts, and continues to operate in
selected mode.
Operating OPEN NORMAL to ENDO to NORMAL
Operating CLOSED ENDO to NORMAL only
Operating ENDO
Cycle
CLOSED,
then OPEN for
4 seconds or more
ENDO will default to NORMAL then starts a
new cycle.
Operating Normal Cycle
CLOSED,
then OPEN for
4 seconds or more
Remains in NORMAL mode, and starts a new
cycle.
Cleaning (Manual) CLOSED or OPEN
NORMAL mode only.
Inhibits intial replenishment.
Shutter Action:
1. Accumunlates film length for replenishment.
2. Does not initiate process cycle.
End of ENDO Cycle CLOSED Restes to NORMAL mode
End of Normal Cycle CLOSED Stays in NORMAL mode
Power On CLOSED or OPEN Is in NORMAL mode
Power On OPEN Inhibits intial replenishment
FILM SHUTTER FUNCTIONS

14
MODE DEV TEMP DISPLAY READY
LIGHT
NORM
ARROW
ENDO
ARROW
PROC
LIGHT SHUTTER HEATER POWER
DRYER
&
RECIRC
REPLEN
PUMP
Turn ON > -15° F
Developer
Temperature
Heatup
OFF ON OFF OFF Closed 100% OFF ON
(90 sec)
Turn ON < 77° F
Developer
Temperature
Heatup
OFF ON OFF OFF Closed 100% OFF ON
(90 sec)
Turn ON < 77° F
Developer
Temperature
Heatup
OFF
or
ON
ON OFF OFF Closed
100% (1st min)
<100% (to OFF) OFF ON
(90 sec)
Normal
Temperature
Rise
77 to 81° F
Developer
Temperature
Heatup
OFF ON OFF OFF Closed 90 to 20% OFF OFF
Fast
Temperature
Rise
77 to 81° F
Developer
Temperature
Heatup
OFF ON OFF OFF Closed 45 to 10% OFF OFF
At Set Point 82° F 82° F ON ON OFF OFF Closed OFF OFF OFF
In Control Loop
(Guard Band)
SEE NOTE 1
81 to 84° F
80 to 83° F
82° F
(ADC=118
(ADC=118)
SEE NOTE 2
ON ON OFF OFF Closed
OFF to 20% &
100% for 1 min
every ADC change
if temp drops.
SEE NOTE 3
OFF OFF
Developer Hot > 83° F Developer
Temperature OFF ON OFF OFF Closed OFF OFF OFF
Processing
NORMAL 80 to 84° F 84° F
(Set Point) ON ON OFF Flashing Open
(+5 sec) Off to 20% ON
ON as long
as shutter
is open
SEE NOTE 4
Processing
NORMAL 80 to 84° F 84° F
(Set Point) ON ON OFF ON Closed Off to 20% ON
ON as long
as shutter
is open
SEE NOTE 4
Processing
ENDO 80 to 84° F 84° F
(Set Point) ON ON OFF Flashing Open
(+5 sec) Off to 20% ON
ON as long
as shutter
is open
SEE NOTE 4
Processing
ENDO 80 to 84° F 84° F
(Set Point) ON ON OFF ON Closed Off to 20% ON
ON as long
as shutter
is open
SEE NOTE 4
Processing
CLEANING 80 to 84° F 84° F
(Set Point) ON ON OFF Flashing (short/long) Closed Off to 20% ON OFF
Processing
CLEANING 80 to 84° F 84° F
(Set Point) ON ON OFF Flashing (short/long) Open Off to 20% ON OFF
Processing
CLEANING
(shutter open fail)
80 to 84° F 84° F
(Set Point) ON ON OFF Flashing (short/long)
Open, but
no signal =
Closed
Off to 20% ON OFF
FUNCTION CHARTS
Notes:
1. Control loop 80 to 84°F during heat up and from above 84°F upon cool down.
2. Set point temperature range is between 79 and 86°F (ADC = Analog to Digital Count).
3. 100% HEATER POWER for 1 minute when processor power is turn ON each time the ADC changes
(increases) as temperature drops and every 4 minutes if temperature is below set point and ADC does
not change.
4. See page 17 for pump on times.
FUNCTIONAL MODES

15
FUNCTION CHARTS
DEVICE DEVICE STATE or
TEMPERATURE DISPLAY HEATER CONTROL HEATER
Thermistor
(SEE NOTE 1) OPEN -15°F (SEE NOTE 2) OFF OFF
Thermistor SHORT or > 99°F 99°F OFF OFF
Thermistor < -15°F Developer Temp
(SEE NOTE 3) OFF OFF
Thermistor Set Point to 99°F Thermistor Condition
(SEE NOTE 5) OFF OFF
Thermistor > 99 to 130°F 99°F OFF OFF
Plate Thermal Switches
(Dev or Fix)
> 130°F
(SEE NOTE 4)
Thermistor Condition
(SEE NOTE 5) By Thermistor OFF (Resetable)
Plate Thermal Fuse
(Plate Center)
>305°F
(SEE NOTE 6)
Thermistor Condition
(SEE NOTE 5) By Thermistor OFF (Blown Thermal Fuse)
Notes:
1. There is only a developer thermistor, There is no monitoring or control of the fixer temperature.
2. A sensed temperature of <-15°F produces a voltage that looks like an open circuit and the heater
control turns off.
3. At 32°F the display shows approximately 37°F due to zener diode conduction.
4. This condition occurs only if there is no chemistry in one or both of the developer or fixer tanks for the
tank(s) containing no chemistry and the developer thermistor senses a temperature below the set
point (typically 82°F) for the heating control system has failed into being continuously on.
5. The thermistor condition is the temperature that the thermistor senses or to which it defaults based on
abnormal conditions.
6. This condition occurs only if there both tanks and both thermal switches fail in the closed position and
the developer thermistor is sensing a temperature below the set point (typically 82°F) or the heating
control system has failed into being continuously on.
CHEMISTRY HEATER ABNORMAL CONDITIONS AND PROTECTION
Notes:
1. Trailing edge not in fixer by approximately 1/4 inch when speed goes slow and leading edge out of
fixer by a 1/16 inch when speed goes to fast.
2. CLEANING Mode is formally known as MANUAL Mode (Keypad has changed).
General Notes:
1. Drive motor gearbox has 21-tooth gear for ENDO and a 52-tooth gear for NORMAL.
2. Drive motor gearbox and worm shaft have 12-tooth sprockets.
3. Drive motor has grade A insulation and a 1.8 uF capacitor.
4. Shutter close to speed change (fast to slow) = 41 seconds and speed change (slow to fast) is 23 or
64 seconds after shutter closes.
TRAILING EDGE TO TRAILING EDGE FILM TIMES
MODE
SHUTTER
to DEV
(min:sec)
IN
DEV
(min:sec)
X-OVER to
FIX
(min:sec)
IN
FIX
(min:sec)
X-OVER
to WASH
(min:sec)
IN
WASH
(min:sec)
X-OVER
to DRYER
(min:sec)
IN
DRYER
(min:sec)
OVER-
RUN TIME
(min:sec)
TOTAL
PROCESS
(min:sec)
NORMAL 0:19 0:37 0:37 0:37 0:40 0:37 0:20 01:39 01:00 05:30
ENDO 0:08 0:16 0:18
(SEE NOTE 1)
0:28
(SEE NOTE 1) 0:17 0:16 0:09 0:33 0:33 02:33
ENDO (Cul) 0:08 0:16 0:17 0:16 0:17 0:16 0:09 0:33 0:46 02:20
CLEANING
(SEE NOTE 2) 0:19 0:37 0:37 0:37 0:40 0:37 0:20 01:39 04:30 05:30

16
FUNCTION CHARTS
DEVELOPER
TEMPERATURE
(A/D Count)
HEATER POWER PERCENTAGE
For Heating rate
(SEE NOTE 1)
NEON TEST LAMP
Placed Across
Leads of Heater
< 0.44°F/min. > 0.44°F/min.
84 (114) 0 0 LAMP OFF
84 (115) 0 0 LAMP OFF
83 (116) 0 0 LAMP OFF
83 (117) 0 0 LAMP OFF
82 (118)
(SEE NOTE 2) 0 0 LAMP OFF
82 (119) 20
(SEE NOTE 4) 10 LAMP FLASHES (SEE NOTE 3)
81 (120) 20
(SEE NOTE 4) 10 LAMP FLASHES
80 (121) 30
(SEE NOTE 4) 15 LAMP FLASHES
80 (122) 40
(SEE NOTE 4) 20 LAMP FLASHES
79 (123) 50
(SEE NOTE 4) 25 LAMP FLASHES
79 (124) 60
(SEE NOTE 4) 30 LAMP FLASHES
78 (125) 70
(SEE NOTE 4) 10 LAMP FLASHES
78 (126) 80
(SEE NOTE 4) 15 LAMP FLASHES
77 (127) 90
(SEE NOTE 4) 20 LAMP FLASHES
77 (128) 100 25 LAMP ON STEADY
76 to 32 100 30 LAMP ON STEADY
Notes:
1. 0.44°F/min = 1°F/min is a selected reduced power control condition to prevent temperature overshoot.
2. Set point = 82°F (A/D count) = 118 = 1 Volt.
3. ON flash duration is proportionate to the HEATING POWER percentage.
4. 100% HEATER POWER for 1 minute when processor power is turn ON each time the ADC changes
(increases) as temperature drops and every 4 minutes if temperature is below set point and ADC does
not change.
HEATER PAD POWER CONTROL
General Note: The theroetical heating rate of the chemistry is approximately 0.7°F/min (-1°F/min).
The actual heating of chemistry may be different due to thermal inertia.

17
FUNCTION CHARTS
REPLENISHER RATES FOR DEVELOPER AND FIXER
MODE FILM
LENGTH
SHUTTER
Open Time
PUMP
On Time FLUID VOLUME
POWER Turn ON 0 inch 0 min 0 sec 90 sec 126 4.26
POWER Turn ON - CLEANING Mode
(SEE NOTE 1) 0 inch 0 min 0 sec 0 sec 0 0
SHUTTER OPEN - NORMAL Mode 15 inch 2 min 15 sec 35 sec 49 1.66
SHUTTER OPEN - ENDO Mode 32 inch 2 min 15 sec 35 sec 49 1.66
SHUTTER OPEN - CLEANING Mode
(SEE NOTE 1) 15 inch 2 min 15 sec 35 sec 49 1.66
CANADIAN (CUL) AT2000 XR FILM PROCESSOR
(ml) (oz)
STANDARD (DOMESTIC) AT2000 XR FILM PROCESSOR
MODE FILM
LENGTH
SHUTTER
Open Time
PUMP
On Time FLUID VOLUME
POWER Turn ON 0 inch 0 min 0 sec 0 sec 126 4.26
POWER Turn ON - CLEANING Mode
(SEE NOTE 1) 0 inch 0 min 0 sec 0 sec 0 0
SHUTTER OPEN - NORMAL Mode 15 inch 2 min 15 sec 35 sec 49 1.66
SHUTTER OPEN - ENDO Mode 32 inch 2 min 15 sec 35 sec 49 1.66
SHUTTER OPEN - CLEANING Mode
(SEE NOTE 1) 15 inch 2 min 15 sec 35 sec 49 1.66
(ml) (oz)
Notes:
1. CLEANING Mode is formally known as MANUAL Mode (Keypad has changed).
General Notes:
1. There is no replenishment in CLEANING Mode, but standard replenishment occurs if the shutter is
opened for the prescribed times
2. Algorithm for replenisher turn-on time is:
Replenisher start time = NORMAL shutter OPEN time + 2 X ENDO shutter OPEN time.

18
The following provides an approach to verifying the replenisher pump output flow rate for
developer and fixer chemistry. This technique will aid in solving replenisher related problems.
Equipment needed: 250ml Graduated Beaker and Stopwatch
Initial Procedure
1. Verify the electronics are operating as required before starting a replenishment rate
examination. Upon powering up the processor an initial replenishment of chemistry lasts
90 seconds, this can be confirmed by listening for the pump sound near the circulator
drawer (will be the only sound heard from the processor).
2. Ready the stopwatch, turn the power switch ON and start the stopwatch together. Allow
the initial replenishment (pumping) of chemistry to be completed. The replenishers must
pump for a time period between 88 and 92 seconds, discontinued this test procedure if it
is not within that range.
3. Turn the unit's power switch OFF and unplug the processor from the outlet.
Important: Avoid spillage or cross contamination of chemistry.
4. Gain access to the processor chemistry drain lines; each will have to be removed from
respective drain catches to perform this procedure, and then reinstalled upon completion.
5. Confirm that there is an adequate amount of replenishment chemistry in the replenishment
containers (bottles), and that the processor chemistry level is at or near the overflow tube
weir level before proceeding. If any of the levels are low, fill to required levels.
Check Developer Pumping rate
1. Remove the developer (black) drain hose from is drain catch and position it where the
sample to be measured can be collected with the beaker. Be sure that the drain hose
does not have any uphill bends in it, the hose should be on a continuous downward slope
or at worst lying horizontally flat between the processor and the open drain hose end.
2. Plug the processor line cord into the outlet and position the open end of the drain hose
into the 250ml beaker.
3. Turn the power switch ON and wait for the initial replenishment (pumping) of chemistry to
be completed. This takes 90 seconds. This ensures that the liquid in the processor is at
its high and overflow level, and the liquid in the drain line has been primed. Turn power
switch OFF, discard the chemistry in the beaker, and prepare to sample the replenishment
rate with the stopwatch.
4. Position the end of the drain hose into the 250ml beaker, ready the stopwatch, turn the
power switch ON and start the stopwatch together.
5. At the end of the initial replenishment cycle (90 seconds) turn power switch OFF and view
the liquid volume in the beaker. The replenished volume must be between 120ml to
130ml.
6. Reinstall the developer drain hose in its catch.
Check Fixer Pumping rate
1. Repeat the developer replenishment procedure, except use the fixer (red) drain hose.
2. The replenished volume must be between 120ml and 130ml.
DONE
MEASURING REPLENISHER DISPENSING

19
ELECTRICAL DIAGRAMS AND TEST POINTS
AT2000 XR Electrical Diagrams & Test Points
Wiring, test point and thermistor resistance information for the AT2000 XR Film Processor is
provided in this section. The associated charts/diagrams identify all serviceable features and
provide the required parameters to facilitate equipment troubleshooting. Refer to the
appropriate information as required to quickly identify and resolve the equipment fault issue.
qTEST POINT CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
qSYSTEM SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
qCONNECTOR DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
qTHERMISTOR RESISTANCE CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Note: All J1 measurements are made relative to base harness, inside processor while module
is connected. Use needle nose probes when for measurements.
COMPONENT CONNECTOR LIST
J1 = MODULE CONNECTOR (14 PIN ROUND CONNECTOR ON REAR OF PROCESSOR)
J2 = WATER LEVEL SENSOR J5 = DEVELOPER THERMISTOR PROBE
J3 = DRIVE MOTOR J9 = REPLENISHER PUMPS
J4 = CHEMISTRY HEATER PAD TB4 = CIRCULATOR DRAWER
COMPONENT
(Being Evaluated)
TESTPOINT
CONNECTOR
TESTPOINT
PIN No's
VOLTGAGE RANGE
(VAC)
RESISTANCE RANGE
(Ohms)
WATER SENSOR (Shorted
Contacts)
J1 4 & 12 N/A 500 - 600
J2 (component side) 2 & 3 N/A 500 - 600
DRIVE MOTOR J1 3 & 5 (Endo) 103.5 - 126.5 245 - 300
J1 3 & 6 (Endo) 103.5 - 126.5 245 - 300
J3 (component side) 1 & 2 N/A 500 - 600
J3 (harness side) 1 & 3 (Endo) 165 - 175 245 - 300
J3 (harness side) 2 & 3 (Norm) 165 - 175 245 - 300
HEATER PAD J1 3 & 10 N/A 52.5 - 60.5
J4 (harness side) 1 & 2 103.5 - 126.5 N/A
J4 (component side) 1 & 2 N/A 52.5 - 60.5
THERMISTOR J1 13 & 14 N/A See
Resistance Chart,
page 22
J5 (component side) 1 & 3 N/A
REPLENISHERS J1 2 & 3 103.5 - 126.5 1225 - 1500
J9 (harness side) 1 & 2 103.5 - 126.5 N/A
J9 1 & 2 103.5 - 126.5 1225 - 1500
WATER SOLENOID J1 3 & 9 103.5 - 126.5 505 - 615
OR
WATER RECIRCULATION
PUMP J1 3 & 9 103.5 - 126.5 92 - 140
RECIRCULATORS J1 3 & 8 103.5 - 126.5 11 - 13
TB4 1 & 2 103.5 - 126.5 N/A
The following test point chart lists the test point and expected voltage and resistance value
for the associated component of the AT 2000 XR Film Processor. Use the tables along
with the system schematic to check the operating values of each listed component.
Note: All values listed are the normal operating parameters for that component. Any different
values measured during testing implies a problem with that component.

20
SYSTEM SCHEMATIC