Power ON
Does the
scanner's display freeze showing
Waiting for DSP?
Defective IC313, IC311, and/or associated
circuits.
Does display
freeze showing DSP
Loader.... DSP Boot: FX .X
at power on?
DSP boot section
is OK.
Is voltage
okay on LC305 (3.5V),
LC303 (3.5V), LC304 (1.5V),
and IC313-Pin 29
(1.8V).
Defective IC309,
IC308, LC305,
LC303, or LC304.
Is the
clock oscillation okay on
X302 (18.432 MHz).
Defective IC310,
X302, C395,
C396.
Defective IC310, IC311, IC312,
R376, R385, R386, R433, R435.
R438, or other associated
components. Or, defective IC307
(CPU).
NO
NO
NO
NO
YES
YES
YES
YES
DSP Section (Boot Section)
When IC311 (Flash Memory) is replaced,
a one which is loaded with the software
must be used. "APP F1.3/VOC F1.0" is
labeled on the package of IC311 if the
software is preloaded.
Note:
If the software of the CPU is
updated, the software of IC311 might
need to be changed. Pay attention to the
information from the manufacturer.
13
Содержание PRO-197
Страница 15: ...PRINTED CIRCUIT BOARD Main PCB Top View 15 ...
Страница 16: ...Bottom View 16 ...
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Страница 20: ...WIRING DIAGRAM 20 ...
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Страница 75: ...RadioShack Corporation Fort Worth Texas 76102 08A08 ...