Radio Shack PRO-197, Service Manual

Page: 10 / 75

Power ON
Is the display
normal?
Is EEPROM check
program OK?
Defective IC301.
Defective IC307, LCD
and/or associated
circuit.
Is the voltage
of TP2 about 18 V at
960 MHz?
Defective
PLL circuit
(IC4) or
VCO
circuit.
Proceed to Microprocessor
check.
NO
NO
NO
YES
YES
YES
Power on the scanner.
Press 0 while the scanner shows -Welcom To-
Object Oriented Digital Trunking RadioShack.
The scanner shows System Tests: Select a
Test... Exits if no key is pressed. Then press 5 .
The scanner shows EEPROM Test Erase
Momory ENTER if APPROVE CLEAR to EXIT.
Then press ENT .
The scanner shows Testing, and automatically
starts the EEPROM test program.
The scanner initializes the working memory.
Is the voltage
of TP2 about 20 V at
1300 MHz?
Is the voltage
of TP3 about 2.0 V at
512 MHz?
YES
YES
NO
NO
EEPROM check program
procedure as follows:
Note: This procedure clears all information you
stored in the scanner's working memory.
TROUBLESHOOTING
Reception Check
10
Does the
display work
properly?
NO
YES
Does display
freeze showing Waiting
for DSP or DSP
Loder ....
NO
Proceed to DSP
section (Boot
section) check.
YES
The scanner shows GLOB EEPROM area
initialized to defaults. Press any key. Then press
any key.
The scanner shows Initializing the File system
then File system initialized to defaults. Press any
key. Then press any key.