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AL TRONIC 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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Summary of Contents for Altronic CPU-2000
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Page 2: Table Of Contents
ITEM SYSTEM DESCRIPTION PARTS IDENTIFICATION AND SPECIFICATION CPU-2000 LOGIC MODULE CPU-2000 OUTPUT MOD ULE: 291116-1 CPU-2000 OUTPUT MOD ULE: 291132-1, 291132-2 CPU-2000 DIAGNOSTIC MOD ULE: 291105-1 TEST STAND REQUIREMENTS TESTING PROCEDURE-OUTPUT MOD ULE: 291116-1, 291132-1 Voltage Output Test Operational Test... - Page 10 2.3 PARTS LIST - CPU-2000 OUTPUT MODULE 291132-2: reference exploded view on page 8. FIGURE & PART NO. DESCRIPTION REFERENCE NO. QUANTITY Enclosure 210002 Bolt 5/16" 902593 901010 Lockwasher 5/16" 610386 Ground strap 902469 Nut 5/16" 610165 Shock mount 610512...
- Page 11 PARTS IDENTIFICATION dt j Figure 5 -11-...
- Page 12 2.4 PARTS LIST - CPU-2000 DIAGNOSTIC MODULE 291105-1: reference exploded view page 11. FIGURE & QUANTITY PART NO. DESCRIPTION REFERENCE NO 210004 Enclosure 902593 Bolt 5/16" 901010 Lockwasher 5/16" Ground strap 610386 902469 Nut 5/16" Shock mount 610165 610512 Gasket, lid...
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Page 13: Test Stand Requirements
3.0 TEST STAND REQUIREMENTS 3.1 In order to test an Altronic CPU-2000 ignition system, a special test stand is required. The basic test stand is similar to that required for the Altronic II-CPU system. 3.2 The following items are required to test the Altronic CPU-2000 system: A variable speed motor of 0.5 HP or greater, capable of rotating 1500 RPM with a standard... - Page 14 '------ - - - - ---�� _._ ___ � II CPU BACK COVER 281500-x 24 VDC TEST STAND WIRING 4-CYCLE PICKUP INPUT WIRING CPU-2000 LOGIC INPUT 281500-X 5-PIN CONNECTOR DESCRIPTION HALL EFFECT OUTPUT A (4-cycle pickup) PIN E PIN D HALL EFFECT(+) SUPPLY...
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Page 15: Voltage Output Test
5.0 OHMMETER CHECKS 5.1 CPU-2000 OUTPUT MODULE - The following tests should be made using a Simpson Model 260 analog volt-ohmmeter (VOM) set to "ohms". The ohmmeter scale should be set to "Rx 10,000". Readings outside the range indicated establish a defective Output Module. A unit passing the ohmmeter tests may still be defective and the full test should be performed using an oscilloscope (see sections 6.0) to confirm correct operation. -
Page 16: Oscilloscope Tests
6.0 OSCILLOSCOPE TESTS 6.1 TEST SET-UP-Two 100:1 oscilloscope probes are required. Test speed is 360 RPM. NOTE: The signals being monitored are 290 to 350 volts, negative polarity. It is recommended that these tests ° ° be performed with the Output Module heated to a temperature of 150 F. -
Page 17: Testing Procedure - Cpu-2000 Logic Module
Reference Installation Instructions form CPU-2000 II for correct wiring and Operating Instructions form CPU-2000 01 for operation of the Logic Module. Install a test EEPROM with the same number of teeth as the test stand and the same or less than the number of outputs on the test Output Module, or program a blank EEPROM. -
Page 18: Troubleshooting
Logic Module display will read LOW OUTPUT VOL TS ON A (or B) SIDE (reference section 10.6 of CPU-2000 01). Logic Module display will read PRIMARY FAULT (reference section 10.6 of CPU-2000 01). 9.2 LOGIC MODULE - The following tests are to be performed with a known good Output Module. The tests assume a fully functional test stand. -
Page 19: Diagnostic Module
9.4 DIAGNOSTIC MODULE- The following tests are to be performed with known good Logic and Output Modules. PROBLEM TEST TEST INDICATION CORRECTIVE ACTION (see Fig. 5) Section 8.1 Missing or incorrect Replace circuit board assembly (5). No function data (counts). from Module 10.0 BOARD REPLACEMENT PROCEDURE -OUTPUT MODULE TOP POWER BOARD 10.1 DISASSEMBLY PROCEDURE (refer to figure 3 or 4) -
Page 20: Board Replacement Procedure-Logic Module Display Board
12.0 BOARD REPLACEMENT PROCEDURE-LOGIC MODULE DISPLAY BOARD 12.1 DISASSEMBLY PROCEDURE (refer to figure 2) Unplug keypad cable. Remove four screws (7) from the shield board (13) on the display board (12) and remove shield board. Remove ribbon cable. Remove four standoffs (8) and remove display board (12). 12.2 ASSEMBLY PROCEDURE (refer to figure 2) Replace display board (12) and secure with four standoffs (8).
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