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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 make bell
signal, is there pulse wave at
pin 4 of IC4?
OK
Is there pulse wave at
pin 21 of IC5?
OK
Check IC5 and its
peripheral circuit.
BASE UNIT
If you want to reset the unit to the factory settings
1) Set the T/P switch to TONE position.
2) Diconnect the AC adaptor and telephone line code from the base.
3) While pressing the "PAGE" key, plug the AC adaptor.
Keep pressing the "PAGE" key for about 3 seconds.
4) Keep pressing the "PAGE" key, then the IN USE LED will light and the base unit will be reset.
HANDSET
Delection of the Caller ID memory
To delete the Caller ID memory in the EEPROM, proceed with the folloing process:
1) Diconnect the battery from the connector.
2) Connect the battery with pressing
3 seconds.
3) Keep pressing the buttones, and a beep tone will sound and TALK LED will light.
4) Press the "MEM" key, then the handset unit will be reset.
TROUBLESHOOTING HINTS
NG
See 2. The bell does not ring
& page does not ring.
NG
Check IC4 and TEL network
circuit.
NG
Check R58, C45 and R59.
and # buttons, and keep pressing the buttons continuously for about
13
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