Motorola ASTRO Digital Saber User Manual

10-6
Chart 7 . 01/82 or 002, External EEPROM Checksum Failure
Reprogram
external EEPROM.
External
EEPROM
reprogrammed?
End
Yes
Repair opens.
Connections
good?
No
Yes
Verify operation of
Power-Down Reset Per
Fig. W9.
Reset
Functional?
Replace U407.
No
Yes
Fail 01/82 or 002
External EEPROM
Checksum Failure
Use ohmmeter to electrically
verify following signal
connections to source IC:
Signal @ U201 Source
HD0-HD7 U204
HA0-HA13 U204
HA14OUT U206
EE1CS* U206
OE*,MEMR/W* U206
RESET* U407
VCC +5V
VSS GND
Check for operation of
U204 and U206 as
follows: During radio
power up Self-Test,
verify activity
(transisitons from high
to low) on U201 -
EE1CS*, and OE*.
Replace
U201.
No
Yes
No
MAEPF-24415-A
Initial
operation
checks
Good?
Refer to section on
Power-up Failure C.3
and/or Fails to
Bootstrap C.4.
Synopsis
This failure indicates the
External EEPROM data
containing mostly customer
specific channel/mode
information is incorrect.
Basic failure modes are as
follows:
1) The contents of U201 has
been corrupted. A possible
cause of this failure would be
the improper operation of the
RESET circuit during a radio
power down sequence.
2) The decoding logic comprised
of U204 and U206 is not
working properly due possibly
to circuit opens or shorts or
that a failure of one or more of
these ICs has occurred.
3) U201 has failed.
Chart 8 . 01/84 SLIC Initialization Failure
Fail 01/84
SLIC Init Failure
Verify standard
bias per table
Table 3 pertaining
to SLIC.
No
Isolate and
repair problem.
Yes
Standard
bias OK?.
Verify Host/SLIC connections:
Use ohmmeter to electrically
verify following signal
connections to source IC:
Signal @ U206 Source
OE* U204
WE* U204
HD0-HD7 U204
4XECLK U204
HA0-HA4,
HA14_IN, HA15_IN,
HA16,HA17 U204
CSIO1* U204
CSPROG* U204
Synopsis
This failure indicates a failure
in verification of the data in the
SLIC parallel programming
registers Some basic failure
modes:
1) Missing supply or ground to
SLIC.
2) Open in parallel address bus,
data bus or associated select
lines between the host µC and
the SLIC.
3) 4xECLK missing to the SLIC.
4) SLIC is faulty.
Verify 4xECLK on SLIC;
nominal 1.8432MHz
square wave, 0-5V.
Connections
good?
Repair
connections.
MAEPF-24664-A
Yes No
Signals
verfied?
No
Yes
Replace U206.
Replace U204.

Motorola ASTRO Digital Saber Specifications

General

Brand	Motorola
Model	ASTRO Digital Saber
Category	Portable Radio
Language	English