
TelePole WR/ Operating & Maintenance Manual Page 37
8.9. Speaker does not alarm
Fix
Replace CPU Card
Check E1 Unshorted
Check 12V on L1
Replace U8
Speaker does not alarm
Check 5V on U13/4
Yes
O.K.
O.K.
O.K.
O.K.
O.K.
Meter O.K.?
Check 12V power
supply on PC 1945
(section 8.5)
Check
on U8/9 and 0V U8/1
Replace CPU card
END
Yes
Check U8/11
3KHz ±10% bursting pulses
O.K.
Replace U8
Check existing pulses
on Q8 collector
Replace Q8
Replace S1 (speaker unit)
O.K.
O.K.
Check U13/3
3KHz ±10% pulses
Replace U13
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