5.15 Keyload Failure - Motorola APX 5000 Service Manual

5-32

5.15 Keyload Failure

Verify the radio has been programmed with the correct secure algorithm and
verify using the correct keyloader.
Algorithm options :
NNTN8171A
NNTN8172A
NNTN8173A
NNTN8174A
NNTN8175A
NNTN8176A
NNTN8177A
NNTN8178A
Use KVL -3000 or later model keyloader with keyload cable number CKN 6904A
Obtain correct KVL
and cable
Verify GCAI data path.
Check the following
signals: GPIO0, One Wire
Repair connector using
programming failure
flowchart for details.
Replace Expansion
KEYLOAD FAILURE
APX 6000 DVP-XL KIT
APX 6000 DVP-XL KIT with Bluetooth
APX 6000 AES KIT
APX 6000 AES KIT with Bluetooth
APX 6000 DES/DES-XL/DES-OFB KIT
APX 6000 DES/DES-XL/DES-OFB KIT with Bluetooth
APX 6000 NO ALGO BASIC VERSION
APX 6000 NO ALGO FULL VERSION with Bluetooth
No Correct
Equipment?
Yes
With KVL attached to radio
and radio on, verify display
message "KEYLOADING"
With KVL attached to the radio
Keyloading and radio on, initiate a keyload
Yes
No
Message"
displayed?
at R2005 on expansion board.
Yes
Activity?
Board
No
Check and repair
expansion to vocon
connection from
P2001_38 to
J4001_38
Replace Q4001
This failure relates to only secure equipped radios
and indicates a failure to load key with the KVL
indicated by the message "KEYFAIL" and keyfail
tones.
Typical failures would be :
1) Open between the GCAI connector and the
microprocessor which prevents the keyloading.
2) Use of the wrong KVL or keyload cable.
3) Failure of the secure circuitry.
4) No secure personality in the radio codeplug.
from the keyloader and look
for activity on keyload signal
and verify activity
Initiate a keyload
Yes
and check for
activity at R2501 of
Expansion
Yes
Replace U4003
Inspect Q4001 with
Yes
V = ~1.8V keyloader attached . .
Measure BJT input pin2.
No
Replace VoCon
Board
Troubleshooting Charts: Keyload Failure
Synopsis
Inspect GCAI
flex to board
No
connections and
Activity?
Replace Radio
Housing if
necessary
Yes
Initate a keyload
on VoCon board
at J4001_65
Check and repair
expansion to
No
Activity? vocon connection
from P2001_65 to
J4001_65
Yes
Initate a keyload
and check for
activity at
J4001_38
Inspect
No
U4003.
Activity?
Measure
power pin5?
V = ~5.0V?
Yes
Inspect U4003
with keyloader
attached.
V = ~0V
Measure mux
select pin6.
No
Proceed to
No
DC Flow
chart