Garmin GPS 155 - User Manual

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GPS 155

MAINTENANCE AND REPAIR

MANUAL

GARMIN INTERNATIONAL PART NUMBER: 190-00065-05

1200 E. 151

Street REVISION E, MARCH 26, 1998

OLATHE, KANSAS 66062

Main Page

Maintenance and Repair1
Table of Contents2
General Description4
Section 1 Introduction4
Detailed Description5
- Control/Display Unit (CDU)5
- Figure 1 Gps 155 Block Diagram5
- Main Board Assembly6
- RF/IF Assembly8
- Interface Board and Data Cards8
- Figure 4 Rf/If Block Diagram8
- Altitude Decoder Board9
  - Section 2 Troubleshooting10
Troubleshooting Equipment Required10
Self-Test Failures10
Initial Troubleshooting Operations11
- Figure 5 Main Board Testpoints (Top View)11
  - Figure 6 Main Board Testpoints (Bottom View)12
  - Section 312
- Internal Clock Check11
- Power Supply Check11
- Recommended Action12
- Section 3 Disassembly Instructions14
Troubleshooting Chart12
Removal of the Covers14
Board and Module Disassembly15
- Control/Display Unit Removal15
- Altitude Decoder Board Removal15
- Interface Board Removal15
- Main Board Sub-Assembly Removal16
- RF/IF Assembly Removal16
- Battery Pack Removal17
- Power/Dimmer Switch Removal17
- Rotary Switch Assembly Removal18
- Display Board Removal18
Reassembling the Unit18
- Section 4 Service and Testing19
Memory Battery Replacement19
Figure 8 Rom Tool Insertion20
Rom Replacement20
Figure 9 Rom Removal21
Final Test22
- Test Equipment Required22
- Setup22
- Final Test Procedure22
- Figure 6 Figure30
- Figure 10 J2 Rear Connector Pinout Definition30
- Figure 11 J101 Rear Connector Pinout Definition31
List of Replaceable Parts32
Section 5 Illustrated Parts List32
Assembly Drawings33
FIGURE 12 GPS 155 ASSEMBLY DRAWING (View 1)33
FIGURE 13 GPS 155 ASSEMBLY DRAWING (View 2)34
FIGURE 14 GPS 155 ASSEMBLY DRAWING (View 3)35
Figure 15 Gps 155 Connector Diagram35

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Garmin GPS 155 Specifications

General

Brand	Garmin
Model	GPS 155
Category	GPS
Language	English

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