GX15
2 – 47
CONFIDENTIAL
Hands free kit (Headset)
Replace the hands free kit.
Is the signal sent?
Hands free kit is defective.
Parts between JK101 pin 3 andTP120 are defective.
Is 0.7 - 1.8 V applied to JK101 pin 3?
Is 0.7 - 1.8 V applied to TP120?
Is 2.4 - 2.6 V applied to TP176?
R122 is defective.
Is 2.4 - 2.6 V applied to IC103 pin 76?
R115 and C108 are defec-
tive.
IC103 is defective.
Is approx. 1.7 V applied to IC103 pin 79?
Is approx. 1.7 V applied to IC103 pin 95?
R262 and R117 are defec-
tive.
IC103 is defective.
Disconnect the hands free kit. Is speaking voice heard to the
person in the phone mode?
IC103 or IC106 is defective.
Is the voltage 0 V on R101 (IC103 pin 9 side)?
Socket JK101 is defective. (Phone mode is set.)
Replace C123A. Is the problem solved?
C123A is defective.
Replace JK101. Is the problem solved?
JK101 is defective, or the socket plug pin 3 is in a poor contact
with hands free kit.
IC103 and IC106 are defective.
YES
NO
NO
YES
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
Summary of Contents for GX15
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