Gai-tronics 723-901 SmartSeries Remote Subset Amplifier Manuel d'utilisateur télécharger pdf (Page 11)

Pub. 42004-326C

Model 723-901 SmartSeries

Remote Subset Amplifier Page 11 of 13

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How to Diagnose Assembly Faults

When the assembly is in an ADVANCE system that includes a vacuum fluorescent display (VFD), faults

may be automatically detected, transmitted to the MCU in data messages, and displayed or printed. Fault

messages and possible solutions for their causes are described in the table below.

Fault Message Cause and Effect Possible Solution

Watch-Dog timer

Processor has Reset

xd times

(Where x is the

decimal number of

times the watchdog

timer has reset the

processor.)

Cause—The watchdog timer has forced the

processor to reset. This occurs when the reset

pins (J2) on the Handset/FSK/P PCBA are

temporarily shorted or when the watchdog

timer does not receive regular status pulses

from U4 on the Handset/FSK/P PCBA. It

can also be caused by poor FSK

communications and power fluctuations.

Effect—The processor maintains a count of

the number of resets. If the station is powered

down, the count restarts at zero. The station

still amplifies incoming pages. For the fourth

and subsequent resets, the count is zero.

 Verify that the reset pins

2 and 3 (J2) on the

Handset/FSK/P PCBA

are not shorted.

 Replace the

Handset/FSK/P PCBA.

Stuck Contact on

Polled Device

Paging Pressbar

Depressed

Cause—The station has been in page mode

longer than the configured page limit.

Effect—Station page is cut off. When the

pressbar is released, a restore message is sent

to the MCU. The station then resumes normal

operation.

 Verify that the associated

subset’s handset pressbar

page switch is not stuck.

 Replace the

Handset/FSK/P PCBA.

 Replace the Remote

Speaker Amp/Power

Supply PCBA.

Stuck Contact on

Polled Device

Handset Off-hook

Cause—The station has been in the off-hook

state longer than the configured time limit.

Effect—Station handset/headset operation is

cut off. When the station is returned to the

on-hook state, a restore message is sent to the

MCU. The station then resumes normal

operation.

 Verify that the associated

subset’s handset is not

off-hook.

 Replace the associated

subset or the

Handset/FSK/P PCBA.

 Replace the Remote

Speaker Amp/Power

Supply PCBA.

Supervised Audio

Path

Handset

Cause—The station failed its internal health

check of the Handset/FSK/P PCBA.

Effect—The station disables the handset

amplifier health-check function after the first

failure.

 Replace the

Handset/FSK/P PCBA.

 Replace the Remote

Speaker Amp/Power

Supply PCBA.

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Gai-tronics 723-901 SmartSeries Remote Subset Amplifier Manuel d'utilisateur Page 11

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