Garmin 155XL Maintenance Manual page 6

Figure
1-1 GPS 155XL BLOCK DIAGRAM ................................................................................... 1-2
1-2 GPS 155XL CONTROL/DISPLAY UNIT BLOCK DIAGRAM ......................................... 1-3
1-3 GPS 155XL MAIN BOARD ASSEMBLY BLOCK DIAGRAM ......................................... 1-4
1-4 GPS 155 XL GPS RECEIVER BLOCK DIAGRAM........................................................ 1-5
2-1 TEST HARNESS/TEST SETUP J2 ............................................................................... 2-2
2-2 TEST HARNESS/TEST SETUP J1/J5 .......................................................................... 2-3
3-1 CPU BOARD POWER SUPPLY TEST POINTS (TOP VIEW) ...................................... 3-4
3-2 CPU BOARD TEST POINTS (BOTTOM VIEW)............................................................ 3-5
3-3 GPS 155XL INTERCONNECT DIAGRAM .................................................................. 3-10
5-1 CDI DEFLECTION TEST PAGE ................................................................................... 5-3
5-2 OBI TEST PAGE .......................................................................................................... 5-5
5-3 I/O TEST PAGE............................................................................................................ 5-6
5-4 ANNUNCIATOR TEST PAGE....................................................................................... 5-6
5-5 EXTERNAL SWITCHES TEST PAGE .......................................................................... 5-7
5-6 ALTITUDE DECODER TEST PAGE ............................................................................. 5-8
5-7 OBS SELECTED COURSE TEST PAGE ..................................................................... 5-9
5-8 EXTERNAL POWER/BATTERY TEST PAGE .............................................................. 5-9
5-9 DISPLAY INTENSITY TEST PAGE ............................................................................ 5-10
5-10 GPS RECEIVER TEST PAGE .................................................................................... 5-10
7-1 GPS 155XL ASSEMBLY............................................................................................... 7-3
7-2 GPS 155XL GPS RECEIVER ASSEMBLY ................................................................... 7-5
7-3 GPS 155XL MAIN CHASSIS ASSEMBLY .................................................................... 7-7
7-4 GPS 155XL CDU ASSEMBLY ...................................................................................... 7-9
7-5 GPS 155XL REMOTE BATTERY PACK..................................................................... 7-11
Table
3-1 SELF-TEST FAILURES ............................................................................................... 3-2
3-2 TROUBLESHOOTING CHART..................................................................................... 3-6
3-3 J1 PINOUT INFORMATION ......................................................................................... 3-8
3-4 J2 PINOUT INFORMATION.......................................................................................... 3-9
6-1 REPLACEABLE PARTS ............................................................................................... 6-1
iv
LIST OF ILLUSTRATIONS
LIST OF TABLES
Page
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190-00067-25 Rev D