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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
!
Note
1. SW1: It should be Normal position during normal operation.
This is not used.
2. SW2: This is for the purpose of SRAM back-up for ACD/UCD announcement.
It should be turned ON during installing the DVIB, to protect announcements in the
case of a power fail.
" Caution :
Danger of explosion if battery is incorrectly replaced. Replace only with the same
or equivalent type recommended by the manufacturer. Dispose of used batteries
according to the manufacturers instruction."
3. JP8: It should be OFF (A-law) for audio input.
Check Points
1. JP8 and IC on U36.
2. CONN5, CONN6 and CONN7 should be open.
3. Add-on boards: DMEU, DMEU4, ADPU
Figure 3.4.7
CONN7
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
CONN1
U2
ON OFF
JP8
U1
Board Layout and ADPU, DMEU/DMEU4 installation
92
CONN6
CONN5
1
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