User Guide

PAMS
Technical Documentation
NME–3
JBD–2 User Guide
Page 19
Issue 1 10/99
Operation Mode FLS1
In this mode, the NME–3–RU can be reprogrammed with the new flash
concept.
RU
JBD–2
HS
PC
MBUS
FLS–1
Figure 15. Principle new Flash concept
Power Distribution Diagram
The main operational voltage is +5 and +12V, but the
balanced–to–unbalanced and unbalanced–to–balanced converters need a
special operating voltage: +10V. In the audio mode 5, the power supply of
the handset will be supplied from the JBD–2. The level detection circuits
also need +12V. This is why four voltage regulators are needed.
Verpolungsschutz
+ 1,5A Fuse
JBD–2
FLASH
CAR12V, CARGND
RU
Connector
HS
Connector
+12V
Adj. 12V REG
1 A
Adj. 10V REG
250 mA
Adj. 5V REG
1 A
+10V
+5V
CTRL_SystemMode
CTRL_FLASH_Prg
HS8V_RU
HS8V
V
+
TESTBOX
Adj. 8V REG
1 A
Figure 16. Power Distribution
The voltage will be controlled via dedicated control lines. The control line
“CTRL13” will be activate if the switch is in its upper (TEST) position.
The control line “CTRL12” will be activated if the audio mode 5 is selected.