SERVICE MANUAL
Document No
Date of Origin
Date of REV
51-L-DSR004
98-10-21
PAGE REV.
0
PAGE
42 /102
S-00-005(96.03.27)
REV.1
7-12-3.
Check U703.15
and U703.4 with an oscilloscope.
Also check G729 part 7-11-3-2
to 7-11-3-3
items.
7-13.
Int e r a c t i v e ( M o n d e x ) Card Int e r f a c e
7-13-1.
Insert the card while the DRX100 is power on.
Check if "Slot #1 card inserted"
message
is displayed
on the PC's
monitor.
If there is a message
displayed
then go to 7-13-2.
If there isn't any message
displayed
then go to 7-13-3.
7-13-2.
Check if the card in slot #1 is defected.
7-13-3.
Check the RESET signal with an oscilloscope
on U450.34(TDA8006AH)
or R454 at main power on.
If there is no RESET signal check U1(TP2).
7-13-4.
Check the TX signal of U450.39(R456)
when inserting
the card.
If there is no signal you can suspect
a mechanical
defect or U450 IC
damage.
7-13-5.
If there is a mechanical
defect replace
the whole main PCB,if the
IC is damaged
replace
U450.
7-14.
NDS Card Int e r f a c e
7-14-1.
Insert the card while the DRX100 is power on.
Check if "s/c inserted"
message
is displayed
on the monitor.
If there is a message
displayed
then go to 7-14-2.
If there isn't any message
displayed
then go to 7-14-3.
7-14-2.
Check if the NDS card is defected.
7-14-3.
Check the RESET signal oscilloscope
on U400.20(TDA8004)
at main
power on. If there is no RESET signal you can suspect
a defect on
ICAM section
or U1(TP2).