SERVICE MANUAL
Document No
Date of Origin
Date of REV
51-L-DSR004
98-10-21
PAGE REV.
0
PAGE
40 /102
S-00-005(96.03.27)
REV.1
7-10.
ICAM
7-10-1.
Look for a message
on the terminal
on power on stage as below;
"Task <opentv
Task1>:
ICAM version
is 00XX" if 00XX is "0000" that means there is a H/W
defect in the ICAM part.
7-10-2.
For normal descrambling
operation
you will have to check the below
points with an oscilloscope;
7-10-2-1.
TSI_BYTECLK
(U800.89
or R821)
7-10-2-2.
TSI_packetCLK(U800.75
or R819)
7-10-2-3.
TSI_BYTECLKVALID(U800.77
or R817)
7-10-3.
Connect
the DRX100 to an antenna
and insert an valid NDS card and
check the outcoming
descrambled
data.
TSI_DATA[0..7]
(R260 ~ 267)
7-10-4.
If 7-10-2 and 7-10-3 are normal then you can suspect
the QPSK(U100)
TP2(U1)
or the NDS card interface
partition,
if 7-10-2 and 7-10-3 are not normal,
check MB87F2011(U800)
and
MACH215(U802)
for open/short
circuits,
bad soldering.
7-10-5.
If it is still defected
inspite
of checking
items 7-10-1 to 7-10-3
then it should mean that the IC MB87F2011(U800)
and MACH215(U802)
have a unrecoverable
damage.
Replace
the IC's or replace
the main
PCB.
7-11.
G729A
7-11-1.
Type "T5" command
on the terminal
and check U305.36
and 38 with an
oscilloscope.
If there is no signal then go to 7-11-2.
If there is a
signal then go to 7-11-3.