Service manual

GX30

2 – 50

CONFIDENTIAL

2. Voice transmission/recording is impossible.

Phone (Handset)

Replace the microphone.

Is the problem solved?

The built-in microphone is defective or in a poor contact with

the PWB.

L101, L102, and C101 are defective.

Is 1.2 - 2.1 V applied to both ends of C101? Is 1.2 - 2.1 V applied to TP119?

Is 2.4 - 2.5 V applied to TP176?

R125 is defective.

Is 2.4 - 2.5 V applied to IC103 pin 76?

R115 and C108 are defec-

tive.

IC103 is defective.

Is approx. 1.7 V applied to IC103 pin 80? Is approx. 1.7 V applied to IC103 pin 96?

R263 and R130 are defec-

tive.

IC103 is defective.

Is 2.7 or more voltage applied to R192 (IC106 pin 89 side)? R192 is defective. (Headset mode is set.)

Replace C126 or C133. Is the problem solved? C126 or C133 is defective.

IC103 and IC106 are defective.

YES

NO YES

YES