Videx SENTRY Manuale Utente Scaricare il pdf (Pagina 31)

PAGE 29 of 29 SENTRY TECHNICAL MANUAL VER1.6

Nothing happens when any call button is

pressed

Check power to the Sentry PCB.

Check the CB line to the door panel. Should be

12Vdc.

No call tone to telephone but speech and

lock ok when handset is lifted

Check terminal T on the telephone for continuity

back to the Sentry PCB

Check the call tone fuse on the Sentry PCB. (If it

repeatedly blows then there is a short on the T line to

the telephones)

Hum on the speech lines

Ensure all intercom cables do not run close to higher

voltage cables

Try another amplifier at the door panel.

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Videx SENTRY Manuale Utente Pagina 31