Panasonic KX-TSC62SXW - Troubleshooting Guide; Service Hints and Cures; Set Dead Troubleshooting; Pulse Dialing Problems

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KX-TSC62SXB/KX-TSC62SXW
8 Troubleshooting Guide
8.1. Service Hints
8.2. Set Dead
8.3. Pulse Dialing Problems
Check IC801 (58), C481~C484, R481~R483.
Check IC801, X2.Dead.
Check Q401, Q431, Q433 and handset jack.Can't hear the voice from handset.
Check Q422, Q401 and handset jack.No voice transmit.
Can't tone dial.
Check IC201.
Check Q301, Q302, Q305.
No rings.
Can't pulse dial.
SYMPTOM CURE
Check C501, C521, C502, C522, R501, R521, R507, Caller ID Function doesn't work.
Check around IC501, Q501, Q502 and Q554.
Caller ID Function doesn't work. (DTMF)
Check IC601.
Can't speak with the speakerphone.
C507 and IC501.
Check IC801, R621, R619.Can't change the volume for Speakerphone.
Is output of C106 positive about 3.6V
Is the input voltage Q101 emitter
about 48V(line)/24V(PBX) ?
Check Tel Line.
Check Q103,Q102 and Q101.
Is output of D808 cathod about 3.4V
Check D808.
Check IC801 and X2.
YES
NO
YES
YES
NO
NO
Can a pulse sound
be monitored?
Check TEL line Jack.
Do pulses
(3 Vp-p) appear
at Pin56 of IC801?
Do pulses
(3 Vp-p) appear
at base of Q305?
Does the voltage
across Tip (T) and
Ring (R) rapidly
switch between 48V
and 10V ?
YES
NO
Check IC801,
X2.
NO
Check dial mode
in Pulse Dialing?
Change to
Pulse Dial
mode.
NO
Check Q305.
Check Q301 and
Q302.
NO
YES
YES
YES
YES
NO