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7 TROUBLE SHOOTING GUIDE
7.1.
Service Hints
Dead
Can't hear the voice from handset.
No voice transmit.
Can't tone dial.
Can't pulse dial
Can't auto redial
No rings.
can't speak with the speakerphone.
Can't hold.
Can't speak with the handset.
Can't speak with the headset.
Can't change the volume for speakerphone.
Can't change the volume for handset.
No volume handset or speakerphone.
7.2.
Pulse Dialing Problems
SYMPTOM
CURE
Check IC801, X801, X802
Check Q109, Q405, Q406.
Check Q421, Q424, Q108.
Check IC801, R445, R444, R443, C436.
Check Q101, Q103, Q104.
Check IC201, Q201.
Check D1, IC1 and SW1 (Line1), D21, IC22 and SW21 (Line 2).
Check IC601.
Check SW510, Q501, Q551.
Check handset jack
Check headset jack
Check IC801, IC601
Check IC801, Q405
Check IC801, Q108, Q401.
17
KX-T2378JXW
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