Sharp GX10i Service Manual page 47

2. Incoming audio cannot be heard.
Phone
Signal output at TP167/TP168?
Signal output at C102?
Signal output at C120?
Voltage of more than 0.5 V applied to C186 (IC102 6 pin
side) ?
Voltage of more than 2.4 V applied to Q101 3 pin?
Q101, Q101 2 pin to IC104 78 pin, and IC104 defective.
Hands free kit
When replacing the hands free kit, output available?
Signal output at JK301 4 pin?
Signal output at TP107?
Signal output at C117?
Is the voltage of 0 V applied to C186?
Relay FPC_B, CN202, CN306, and JK301 defective.
CONFIDENTIAL
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
Built-in receiver defective or defective connection between
TP167 and TP168.
YES
L103 or L104 defective.
YES L103 to IC102 62pin, L104 to IC102 61pin, L103, L104,
L107, and L108 defective.
YES
IC102 or PWB defective.
YES Relay FPC_B, CN202, CN306, JK301, R106, and R109
defective.
YES
Hands free kit defective.
YES
Defective connection of JK301.
YES
Relay FPC_B, CN202, CN306, L303, and JK301 defective.
YES
C104 defective.
YES
IC102 or PWB defective.
2 – 43
GX10i