Motorola ASTRO Digital Spectra Plus Detailed Service Manual page 223

Troubleshooting Charts
repair problem.
See Chart C.5
Refer to host C
ROM checksum
error (FAIL 01/81).
When reFLASHing
host code, there
fundamental modes
of failure: 1) The
host C fails to
respond or 2)
reports an error
in programming.
6881076C25-E
Radio Power-Up
Synopsis
Failure.
This failure assumes the radio
fails to power up correctly and
does not send any Power up
Verify standard failure messages via the
bias per table
display or serial bus. Some
Table 3 pertaining basic failure modes:
to host C. 1) Radio is inhibited.
2) Battery voltage is low.
3) A problem exists with a
supply or system clock.
4) Host C code is corrupted.
Isolate and 5) Host FLASH or RAM is
No Standard
faulty.
bias OK?.
6) Corrupted host C
configuration register.
7) Host C or SLIC is faulty.
Yes
Using RSS,
verify radio is
not inhibited.
Using RSS,
reinitialize host
C
configuration
Radio is register and
Use RSS to
No Yes
not inhibited or reverify initial
clear radio
unable to
problem. Note:
inhibit.
check?
if this requires
writing the
internal EE, the
radio must be
realigned.
ReFLASH host
C code.
Error
Yes No
No Error in
ReFLASHING
Bootstrapping
host C code?
host C?
Chart C.6
Yes
Yes
Refer to section
on Failure to
Bootstrap.
are two
Chart C.4
1
End. During radio power-up
Self-Test, verify
activity (transitions
Yes from high to low) on
U202 OE* and WE*.
Power up
failure fixed?
Yes
Signals
No
Replace U206.
verified?
Verify operation of
U211 and logic AND
gate. During radio power
up Self-Test, verify
Reverify initial
activity (transitions
problem.
from high to low) on
U211 IN_B.
Initial
problem
persists?
Signals
Replace U204.
verified?
No
End.
1
Verify Host Port:
Use ohmmeter to
electrically verify
following signal connections
to source IC:
Signal @ U202 Source
Signal @ U206 Source
HA0-HA13 U206
OE* U204
HD0-HD7 U204
WE* U204
MEMR/W* U206
HD0-HD7 U204
OE* U206
4XECLK U204
CS* U211
HA0-HA4,
HA14_IN, HA15_IN,
Signal @ U211 Source
HA16,HA17 U204
IN_B U204
CSIO1* U204
IN_A U206
CSPROG* U204
Yes No
Connections Repair
good? connections.
During radio power-up
Self-Test, verify
No
activity (transitions
from high to low) on
U202 CS*.
No Signals Yes
Replace U202.
verified?
Replace U211.
MAEPF-24419-A
5-5
Chart C.3 Radio Power-Up Fail
September 5, 2008