5.13 Keyload/Secure Hardware/Memory - Motorola APX 1000 Detailed Service Manual

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5.13 Keyload/Secure Hardware/Memory

Keyload Failure
Obtain correct KVL
and cable
Verify GCAI data path.
Check the following
signals: GPIO4, One Wire
Repair connector using
programming failure
flowchart for details.
Replace Keypad
Board
KEYLOAD FAILURE
No Correct
Equipment?
Yes
With KVL attached to radio
and radio on, verify display
message "KEYLOADING"
Keyloading
Yes
No
Message"
displayed?
Initiate a keyload
and check for
activity at R2501 of
Keypad
Yes
Yes
Activity?
No
Check and repair
keypad to main board
connection from
P2001_22 to
J2301_22
Replace Q4001
Troubleshooting Charts: Keyload/Secure Hardware/Memory
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.
With KVL attached to the radio
and radio on, initiate a keyload
Activity?
from the KVL and look for activity
on keyload signal at the P1000_4
connector on the GCAI Flex.
With KVL attached to the radio
and radio on, initiate a keyload
from the keyloader and look
for activity on keyload signal at
P1000_21 on Front Kit Flex.
Check and repair Front Kit flex
connector to Keypad board
connector
Yes
Replace U4003
Yes
Inspect Q4001 with
V = ~1.8V keyloader attached .
Measure BJT input pin2.
No
Replace main
Board
Synopsis
Inspect GCAI
flex to board
No
connections and
Replace GCAI
Flex if
necessary
Yes
No
Activity?
Yes
Check signal at
Front Kit connector on
the keypad P2000_21
No
Activity?
Yes
Check signal at
R2005 on keypad board
No
Activity?
Yes
Check signal at
main board connector
J2031_28
Activity?
No
Inspect
U4003.
Measure
power pin5?
No
V = ~5.0V?
Yes
Inspect U4003
with keyloader
attached.
V = ~0V
Measure mux
select pin6.
No
Replace Front Kit
Flex
Check and repair
keypad to main board
connection from
P1000_21 to
J2031_21
Proceed to
DC Flow
chart