46
Troubleshooting
Flow Chart
START
Assure radio and battery
are not faulty by thorough
tests or substitution
Repair or
replace battery
Turn on
power supply.
Set to 13.8V
Is
supply current
>10mA?
Load radio, set volume
off with discharged
battery in adapter,
per install figure #5
Turn
radio on
Does
the supply
current increase
by 0.12A?
Check
L10, R109, R6,
VR12, U5
Check
D4, D6,
VR52
Is
radio to
TX?
END
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
Good
Good
Bad
Check
fuses
Check
DC switch
Q6, Q19, Q4
Check charger
Q1, Q2, Q3,
Q20, Q13, U3
Is
supply current
>400mA?
Is charger
LED red?
Rapid
charge
is OK
Press PTT
on mic
Is mode
LED red?
Check
Q16, D2,
R169, L8,
Q26, R1,
R168, L7, R2,
VR25, VR51,
VR8, VR62
Speak
into mic while
pressing PTT
Check radio
on channel,
U4 pin7, Q24, Q7,
U2, U4-1
Is U3
pin 5
>2V?
Check
Q10, D1
Is
supply current
approx
120mA?
Is charger
LED green?
Trickle charge
is OK
Check P,
R74 to R81,
U3
Is radio
modulated
>3kHz?
Check
VR30, U4-14,
R214, VR52
Generate a
modulated carrier
RF into XTVA
Is
connected
PA/SPKR
loud?
Use room
temperature
battery. Check
U5 pin 48 = 2.34v
check R26
Check U5
pin 48 = 2.34v
pin 50 = 0.79v
Turn on
yellow
wire’s
power
source
Summary of Contents for Astro Dimetra MTP
Page 1: ...1 XTS DIMETRA MTP Portable Radios Vehicular Adapter XTVA Instruction Manual MAEFP 26768 O ...
Page 14: ...4 Notes ...
Page 34: ...24 Notes ...
Page 54: ...44 Notes ...
Page 60: ...50 Notes Notes ...
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