TROUBLESHOOTING GUIDE
Is the voltage at cathode
of D512 about 5V?
No
Yes
Is the voltage at pins 15, 22
and 70 of IC1001 about 5V?
No
Yes
Check IC1001.
Check AT+5.2V line and the
check peripheral circuit.
Check Around T501.
POWER DOES NOT TURN ON
<HR-J3009UM>
Is the voltage at cathode
of D512 about 5V?
No
Yes
No
Yes
Check IC1001.
Check AT+5.2V line and the
check peripheral circuit.
Check Around T501.
POWER DOES NOT TURN ON
<HR-J4009UM>
Is the voltage at pins 15 and
22 of IC1001 about 5V?
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Summary of Contents for HR-J3009UM
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