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  TM 11-7025-234-23
V.29-TS-00
MODEM CHECKOUT/SYMPTOM INDEX
I
FAULT SYMPTOMS
I
RUN LAMP CHECK
I
NO
INDICATOR FAILS
--
DO ALL INDICATORS LIGHT? `
LAMP CHECK
YES
RUN MODEM CHECK
1. PRESS MDM CHECK
2. PRESS DATA CLAMP
3. OBSERVE INDICATORS
I
ARE THE FOLLOWING
INDICATORS PRESENT?
TEST-
LIT
FAILS
XMT DATA
-OFF
SELF TEST
RCV DATA
-OFF
GOOD DATA
-LIT
MARG CKT
-OFF
CARR LOSS
-OFF
I
1. RELEASE DATA CLAMP
BY PRESSING SWITCH
2. RELEASE MDM CHK BY
PRESSING SWITCH
3. CLOSE COVER
J
4-5
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