Read Panasonic KX-TS2365CAB / KX-TS2365CAW Service Manual online
13
KX-TS2365CAB/KX-TS2365CAW
8.3.
Tone Dialing Problems (handset)
8.4.
No Ringing Sound When Ring Signal is Input
YES
YES
YES
NO
NO
NO
Can the DTMF
sound be monitored?
sound be monitored?
Does the DTMF signal
appear at base of Q424?
appear at base of Q424?
Check Q424,Q108.
Does the DTMF signal
appear at Pin62 of IC801?
appear at Pin62 of IC801?
Check
R482, C481 and Q406, D401.
R482, C481 and Q406, D401.
Check
R921, R922, R923, R924,
R925 and C923.
R921, R922, R923, R924,
R925 and C923.
Check IC801, X801 and X802.
YES
YES
YES
YES
NO
NO
NO
NO
Call the unit from
another telephone.
another telephone.
Does a sine wave of
approximately 60V or more
appear across Tip and Ring?
approximately 60V or more
appear across Tip and Ring?
Check the telephone line
and the telephone line cord.
and the telephone line cord.
Is the voltage at the anode
and cathod of D1 30V?
and cathod of D1 30V?
Check C1, C2, R1, D1, D2,
D3, D4, D5 and D6
D3, D4, D5 and D6
.
Is the voltage across Pins 1
and 5 of IC1 30V
and 5 of IC1 30V
Check IC1.
Does the tone ringer
output signal appear
across Pin 8 and 5 of IC1?
output signal appear
across Pin 8 and 5 of IC1?
Check
IC1, R2, R3, R4, C3 and C5.
IC1, R2, R3, R4, C3 and C5.
Check the SW1, Q1 and T1.
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