TM
11-6625-3041-30/TO
33A1-8-908-12
2-6.
SG-1139 CHECK PROCEDURE (CONT)
Step Balanced
Set controls as
q
follows:
5
NRz out
POWER . . . ON
TIMING . . MASTER
Set DATA RATE to
128 through 4096;
At each setting,
FAULT indicator
must not be lit.
If It is not,
proceed to step 6.
This step checks the following:
I
Transmit 1 card . . . 128-4068 family data rate decode and
select
Master Osc at 8.192 MHz
NRZ Clock Gen at 128 through 4608 kHz
BALANCED TMG OUT circuits
BALANCED DATA OUT circuits
Control Filter . . . . DATA RATE control 128-4608 family
settings
If FAULT indicator is lit at any setting:
Remove LOGIC access cover (refer to TM 11-6625-3041-12) and
note which card contains a lit fault indicator. Replace that
card and repeat step 5.
If no card contains a lit fault indicator, possible cause is
Transmit 1 card A3. Replace (refer to TM 11-6625-3041-12), and
repeat step 5.
If replacement card does not provide proper indication,
possible cause is Control Filter A8. Replace (refer to
2-10