Welch Allyn AudioScope, Руководство по обслуживанию

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1.7a Operating Program
:
23300 (ASIC TYPE) up to and
including serial no.9609999
Multi-Level AudioScope3
ASIC
Sequence : Cause: Effect:
1. Manual Switch "ON" Lamp "ON", Ready LED "ON"
2. Manual
Press "START" ASIC activated
3. Logic
pin 20 goes low activates PT (PreTone) LED (D6)
PreTone 1kHz sine wave Speaker produces 1 kHz PreTone
appears at ASIC Pin 4
and is amplified and then
applied to speaker
from ASIC Pin 7
(General cycle is repeated for TEST tones: 1000 Hz, 2000 Hz, and 4000 Hz and 500 Hz)
4. Logic
ASIC Pin 21 goes low activates 1 kHz LED (D5)
1kHz sine wave Speaker produces 1 kHz Tone
appears at ASIC Pin 3
and is amplified and then
applied to speaker
from ASIC Pin 7
5. Logic
ASIC Pin 22 goes low activates 2 kHz LED (D4)
2kHz sine wave Speaker produces 2 kHz Tone
appears at ASIC Pin 6
and is amplified and then
applied to speaker
from ASIC Pin 7
6. Logic ASIC Pin 23 goes low activates 4 kHz LED (D3)
4kHz sine wave Speaker produces 4 kHz Tone
appears at ASIC Pin 5
and is amplified and then
applied to speaker
from ASIC Pin 7