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Service Manual
Table of Contents
A. Testing Flow Chart...............................................................................................................3
B. Check U1 Pin 1 +5V ............................................................................................................4
C. Check U1 Pin 3 Data Clock .................................................................................................5
D. Check X1 Working Frequency.............................................................................................6
E. Check IC1 Pin 41 Reset Signal............................................................................................7
F. Check K4 Pin4 .....................................................................................................................8
Version 1.0
Page 1
Summary of Contents for GM56USB
Page 1: ...Service Manual GM56USB MODEM...
Page 5: ...Service Manual B Check U1 Pin 1 5V U1 PIN 1 5V Version 1 0 Page 4...
Page 6: ...Service Manual C Check U1 Pin 3 Data Clock U1 PIN 3 Version 1 0 Page 5...
Page 7: ...Service Manual D Check X1 Working Frequency C10 X1 C16 IC2 Version 1 0 Page 6...
Page 8: ...Service Manual E Check IC1 Pin 41 Reset Signal IC1 Version 1 0 Page 7...
Page 9: ...Service Manual F Check K4 Pin4 K4 PIN4 Version 1 0 Page 8...