Altronic CPU-2000 Original operating manual
ALTRONIC CPU-2000
IGNITION SYSTEM
ALTRONIC ,INC.
712 TRUMBULL AVE.
GIRARD, OHIO 44420
CPU-2000 IGNITION SYSTEM
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SERVICE INSTRUCTIONS
FORM CPU-2000 SI 9-97
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1.0 SYSTEM DESCRIPTION
1.1
The Altronic CPU-2000, DC-powered ignition system is a microprocessor-based capacitor discharge
system applicable to slow and medium speed, stationary engines. The system requires two signals
from external magnetic pickups and one from a Hall-effect pickup. The first magnetic pickup is
needed to count holes orgear teeth
on
the engine flywheel. The second is used to give a reset pulse
once every revolution
of
the crankshaft. The hall-effect pickup is referenced to the camshaft and is
used to reference the compression stroke
on
four-cycle applications.
1.2 The CPU-2000 ignition system consists
of
two main parts; a user interface Logic Module and
an
engine mounted Output Module. The Logic Module has an alphanumeric LCD display showing the
operating status, engine
RPM,
energy level, single or multi-striking mode, current loop input value and
ignition timing. Additional display screens show set-up and diagnostic information. Precise timing
pulses are generated
on
the Logic module and are routed to the Output Module in order to fire the
ignition coils. Circuitry in the Output Module converts 24 volts DC to
-320
volts and directs energy
to the coils in proper sequence. The Output Module is available in 16 and 32-output versions.
1.3 An optional Diagnostic Module 291105-1 provides enhanced primary and secondary circuit
diagnostics
on
an
individual cylinder basis. Included
are
displays allowing the user to monitor relative
voltage demand at the spark plugs and the capability for the system to automatically set its energy
level based upon monitored voltage demand.
1.4 Timing changes
on
the CPU-2000 are derived
by
counting pulses from the reference teeth. The
timing change increment is equal to 90/N where N
=
the number
of
reference teeth or holes. With
180 teeth as recommended for test purposes, the timing increment is one-half degree.
1.5 A
24
Vdc,
10
amp
DC
power supply will be needed to operate the CPU-2000 system. Refer to form
CPU-2000
II,
section 13.0 and drawing 209 120.
*
NOTE:
ITEMS
REQUIRED
ONLY
FOR
4-CYCLE
ENGINES
*
CAMSHAFT
MOUNTED
MAGNET
*HALL-EFFECT
CYCLE
SENSOR
DRILLED
HOLE
OR
GEAR
TOOTH
MAGNETIC
PICKUP
RESET
MAGNETIC
PICKUP
TIMING
SIGNAL
CONTROL
1/0
RS-485
LOGIC
MODULE
-
=
□□□□
□□□□
□□□□
□□□□
SPARK
PLUG
HIGH
TENSION
-
LEAD
24
voe
24
voe
POWER
SUPPLY
OUTPUT
MODULE
=
FIGURE 1
-3-
JUNCTION
BOX
DIAGNOSTIC
MODULE
PARTS
IDENTIFICATION
0 0
s 0
~
POWER
ALARM
0 0
11ltron1c®
CPU-2000
DIGITAL IGNITION
SYSTEM
LOGIC
MODULE
i i
□□□□
2
□□□□
□□□□
□□□□
0 s
0 0
-
I
-
J I
I
I
I
-<J
® ®
® ®
0
Figure
2
-4-
2.0 PARTS IDENTIFICATION AND SPECIFICATION
2.1
PARTS LIST -CPU-2000 LOGIC MODULE 291100-1: reference exploded
view
on page
4.
FIGURE &
REFERENCE NO.
2-1
-1a
-1b
-1c
-1d
-1e
-1f
-1g
-1h
-1i
-2
-3
-4
-5
-6
-7
-8
-9
-9a
-9b
-9c
-9d
-9e
-9f
-9g
-9h
-10
-10a
-10b
-11
-12
-12a
-12b
-13
-14
QUANTITY
1
1
1
6
3
2
2
1
1
1
1
1
8
2
2
10
8
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PART NO. DESCRIPTION
210003 Enclosure
210622 Plate, entry
210625 Gasket, plate
902599 Screw 10-24
510527 Conduit fitting
610220 Mounting bar -vertical
610219 Mounting bar -horizontal
902637 Screw 10-32
610663 Cable strap
610513 Gasket, lid
280001-1 Keypad assembly
602283-4 Frame
902578 Screw 4-40
902611 Screw 10-32
610443 O-ring
902642 Screw 10-32
610662 Standoff
272007-1 Logic board assembly
601726 Fuse 3A
610242 Receptacle plug 16-position
610307 Receptacle plug 12-position
610604 Receptacle plug ?-position
610320 Receptacle plug 5-position
610241 Receptacle plug 3-position
601668-A EEprom, blank
601747 Microprocessor, logic board
272008-1 Shield board, logic
202009 Shield window
902061 Screw 6-32
610583 Cable
272006-1 Display board assembly
601707 Eprom, display board
601710 Microprocessor, display board
202010 Shield board, display
202017A Label
-5-
I
O'l
I
PARTS
IDENTIFICATION
0 0
1/----------------------------~
I®
®:
I
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Figure
3
I
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-
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2.2 PARTS
LIST-
CPU-2000 OUTPUT MODULE 291116-1: reference exploded
view
on page
6.
FIGURE &
REFERENCE NO.
3-1
-1a
-1b
-1c
-1d
-1e
-1f
-2
-2a
-2b
-2c
-2d
-2e
-2f
-2g
-3
-3a
-3b
-3c
-3d
-4
-5
-6
-7
-8
-9
-10
QUANTITY
1
4
8
1
4
4
1
1
4
4
2
1
4
4
1
1
1
4
4
1
1
4
4
4
4
1
4
PART NO. DESCRIPTION
210001 Enclosure
902593 Bolt 5/16"
901010 Lockwasher 5/16"
610386 Ground strap
902469 Nut 5/16"
610165 Shock mount
610512 Gasket, lid
281001-1 Circuit board assembly, bottom
610636 Insulator
902640
Screw6-32
601725 Fuse 10A
502176 Gasket, connector, 17-pin
901000 Lockwasher #6
902064 Screw 6-32
510561 Cap, connector, 17-pin
281002-16 Circuit board assembly, top
501222 Gasket, connector, 19- pin
901000 Lockwasher #6
902064 Screw 6-32
510517 Cap, connector, 19-pin
662008 Ribbon cable
902615 Screw 8-32
710015 Standoff 10-32 (nylon)
610664 Standoff 10-32
902610 Screw 10-32
202011A Label
902578 Screw 4-40
-7-
I
OJ
I
PARTS
IDENTIFICATION
0 0
1/----------------------------~
I I
1@
@1
I I
I I
I I
I I
I I
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Figure 4
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1
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2.3 PARTS LIST -CPU-2000 OUTPUT MODULE 291132-1: reference exploded
view
on page
8.
FIGURE &
REFERENCE NO.
4-1
-1a
-1b
-1c
-1d
-1e
-1f
-2
-2a
-2b
-2c
-2d
-2e
-2f
-2g
-3
-3a
-3b
-3c
-3d
-4
-5
-6
-7
-8
-9
-10
QUANTITY
1
4
8
1
4
4
1
1
4
4
2
1
4
4
1
1
2
8
8
2
1
4
4
4
4
1
4
PART NO. DESCRIPTION
210002 Enclosure
902593 Bolt 5/16"
901010 Lockwasher 5/16"
610386 Ground strap
902469 Nut 5/16"
610165 Shock mount
610512
Gasket,
lid
281001-1 Circuit board assembly, bottom
610636 Insulator
902640 Screw 6-32
601725 Fuse 10A
502176 Gasket, connector, 17-pin
901000 Lockwasher #6
902064 Screw 6-32
510561 Cap, connector, 17-pin
281002-32 Circuit board assembly, top
501222 Gasket, connector, 19- pin
901000 Lockwasher #6
902064 Screw 6-32
510517 Cap, connector, 19-pin
662008 Ribbon cable
902615 Screw 8-32
710015 Standoff 10-32 (nylon)
610664 Standoff 10-32
902610 Screw 10-32
202011A Label
902578 Screw 4-40
-9-
-
10
-
0
Figure 5
-11-
n ,
dtj
2
3.0 TEST STAND REQUIREMENTS
3
0 -�
i
7
L_
L __ J
TEST STAND WNG
4
°°
5.0 OHMMETER CHECKS
= =
-1
5
-
6.0 OSCILLOSCOPE TESTS
° °
Shutdown Patterns
6
7
Fig. 2)
-1
8
-
-1
9
-
-
20
-
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