Panasonic KX-FP101AL Service Manual page 71

1. Defective ITS (Integrated Telephone System) Section
a. No handset and monitor
Perform a signal test in the ITS or the NCU section and locate a defective point (where the signal disappears) on each
route between the handset microphone and telephone line (sending), or between the telephone line and the handset
speaker (receiving), or between the telephone line and the speaker (monitor). Check the components at that point. "CHECK
SHEET" in 2.3.3.5. Analog Board Section is useful for this investigation.
b. No pulse dialing
c. No ring tone (or No bell)
d. No tone dialing
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KX-FP101AL