Motorola ASTRO W3 User Manual

Troubleshooting 5-13 6881096C77-O September 26, 2003
Figure 5-5. W4 Control Head (Sheet 1 of 2)
START
Check U45
(+5V Reg.)
Repair
Is
+5V OK
?
With no buttons pressed, check U1
pins 8-11 for activity.
Activity
on all pins
?
(8-11)
Activity
on one pin
only
?
No activity
at all
Check U1 for
proper operation
and repair
Check that pin for a shorted button closure somewhere on the line. Check return lines (U1 pins 13-15). Check R120-R122.
Press buttons and
check return lines
(U1 pins 13-17).
Check R120-R124
Repair
MAEPF-22619-A
CONTROL UNIT POWERS UP
PROPERLY BUT BUTTON PRESSES
DO NOT WORK.
YES
YES NO YES
NO NO
NO

Motorola ASTRO W3 Specifications

General

Brand	Motorola
Model	ASTRO W3
Category	Radio
Language	English