TM200
1ADJUSTMENTS, PERFORMANCE CHECK, AND FIRMWARE UPGRADE
2 – 30
CONFIDENTIAL
2. VOICE TRANSMISSION/RECORDING IS IMPOSSIBLE.
Phone
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 defective.
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 defective.
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
NO
YES
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
Hands free kit (headset)
(The following procedure applies to both monaural and stereo headsets.)
Replace the hands free kit. Is the signal sent?
Hands free kit is defective.
C104, R112, and V101 are defective.
Is 0.7 - 1.8 V applied to JK101 pin 2?
Is 0.7 - 1.8 V applied to TP120?
Is 2.4 - 2.5 V applied to TP176?
R122 is defective.
Is 2.4 - 2.5 V applied to IC103 pin 76?
R115 and C108 are defective.
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 R129 are defective.
IC103 is defective.
Is the voltage 0 V on R192 (IC106 pin 89 side) ?
Replace C127 or C134. Is the problem solved?
C127 or C134 is defective.
Replace JK101. Is the problem solved?
JK101 is defective, or the jack plug pin 2 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
YES
NO
YES
NO
Jack JK101 is defective, or the jack plug is in a poor contact
with hands free kit (Handset mode is set.)