GX20
2 – 47
CONFIDENTIAL
(From page 2-46)
Voltage of approx. 1 V applied to IC102 54 pin?
Voltage of approx. 1 V applied to IC102 64 pin?
IC102 defective.
Voltage of more than 2.4 V applied to Q101 3 pin?
(To page 2-46)
Parts of R110, R111, C126 and jumper (IC102 64 pin to R111)
defective or soldering defective.
Built-in microphone defective.
defective connection between microphone and PWB.
Voltage of more than 0.5 V applied to C186 (IC102 6 pin
side)?
Attach the PC board on the microphone side again or replace
the microphone. Then improvement observed?
IC102 defective.
Voltage of more than 0.5 V applied to JK301 5 pin?
Parts of hands free connector JK301 5 pin to IC102 6 pin
defective or defective connection between Relay FPC_B and
CN306, CN202.
Voltage of more than 0.5 V applied to JK301 3 pin?
Hands free connector JK301 defective.
Voltage of more than 0.5 V applied to TP106?
Parts of JK301 3 pin to TP106 defective or defective connec-
tion between Relay FPC_B and CN306, CN202.
Voltage of more than 2.4 V applied to Q101 3 pin?
(To page 2-46)
Parts of Q101 3 pin to TP106 defective.
B
YES
C
NO
YES
NO
NO
D
YES
C
YES
YES
NO
NO
YES
NO
YES
NO
YES
NO
NO
D
YES
Содержание GX20
Страница 38: ...GX20 2 32 CONFIDENTIAL Figure 64 Contact points Figure 65 Turning power on Points Push ...
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