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1. The bell does not ring.
When the PAGE SW of the
base is pressed, does the ringer
on the handset ring?
OK
When the TEL SG is joined
with the base to made bell
signal, does PIN 4 of BU8
change from high to low.
OK
By using voltmeter check BU3
of base.
TROUBLESHOOTING HINTS
NG
See 2, The bell does not ring
& page does not ring.
NG
By using voltmeter check
BU8.
Check TEL network primary
NG
OK
circuit.
BU3 is defective.
15
NG
BU8 is defective.
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