Troubleshooting Hints - Toshiba FD-9839 Service Manual

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 IC5?
OK
Is there pulse wave at
pin 49 of IC8?
OK
Check IC8 and its
peripheral circuit.
BASE UNIT
If you want to reset the unit to the factory settings
You can cancel the OGM, PIN, and the clock settings by the following process.
1) Disconnect the AC adaptor and telephone line cord from the base. Keep the AC adaptor connected to the wall
outlet. Make sure that the telephone line cord remains disconnected during this procedure.
2) While pressing the DELETE button, plug the AC power adaptor into the base. Keep pressing the DELETE
button for more than 4 seconds.
A beep sounds and " P" blinks in the LED display.
To resume using the unit, connect the telephone line cord and place the handset on the base.
Note:
If you turn on the unit again, " P" may flash.
HANDSET
Deletion of the Caller ID memory
To delete the Caller ID memory in the EEPROM, proceed with the following process:
1) Connect the battery with pressing
approximate 2 seconds.
2) Release buttons when entering TEST mode with beep.
3) Press CID button.
4) A confirmation beep will sound after about 8 seconds, then the data for caller ID is deleted.
(Note: Do not disconnect the battery until you hear the confirmation beep, otherwise the data may not be
completely deleted.)

TROUBLESHOOTING HINTS

NG See 2. The bell does not ring
& page does not ring.
NG
Check IC5 and TEL network
circuit.
NG
Check R179.
and # buttons, and keep pressing the buttons continuously for
16