Motorola APX 1000 Detailed Service Manual page 131

Troubleshooting Charts: Keyload/Secure Hardware/Memory
Secure Hardware Failure
09/10 or 09/90
Secure Hardware Failure
Make sure the radio is fully assembled. These
errors will occur if Main or Keypad boards are
not properly assembled. Also note a battery
removal and reattachment is needed after a
"Secure HW Upgrade" to clear errors.
Use an ohmmeter to electrically verify the following secure related
signals on the controller board and the Vdd levels:
Signal Probe Point
VDD_IOP R2509
VDD_IOM R2511
VDDC R2512
Are voltage levels
correct?
Yes
Use an oscilloscope to verify clocks on Keypad board:
Signal Probe Point
MACE CLOCK P2001_44
OPT_SSI_CLK P2001_18
OPT_SSI_FSYNC P2001_30
Are signals correct?
Yes
Use an oscilloscope to verify activity
during power-up on Keypad board:
Signal
SSI_RED_RX_MACE
SSI_MACE_DIN
Are data signals
present?
Replace Keypad
board.
equipped radios and indicates a power
troubleshooting is limited to verifying a
Level
1.875V
1.875V
1.875V
No Repair DC Voltage
Regulators
Frequency
4 MHz
1.5 MHz
8 KHz
Use an oscilloscope to verify clocks on Main board:
Signal
No
MACE CLOCK
SSI_OPT_CLK
OPT_SSI_SYNC
Probe Point
P2001_6
P2001_4
Use an oscilloscope to verify activity on Main board :
No
Signal
SSI_RED_RX_MACE
SSI_MACE_DIN
Yes
Synopsis
This failure relates only to secure
up self test failure for the secure
circuitry. More specifically this failure
indicates a failure in communications
between the DSP and the secure
circuitry. The secure circuitry is not
considered to be field repairable so
problem with the secure circuitry and
replacing the controller if required.
Probe Point Frequency
R6113 4 MHz
R6107 1.5 MHz
R2513 8 KHz
Probe Point
J2301_6
J2301_4
Check SSI clock
No
Are signals correct? signals from CPLD
and repair circuitry
Yes
Examine connection
between Main and
Keypad J2301 & P2001
Yes
Are data signals No
present?
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