ELECTRICAL TROUBLESHOOTING GUIDE
Reset or Power Check.
Check it after connecting the power cable
only for NO Reset or Power ON.
Are the pin 41, 44 of CN201
+12V, +5V respectively after the power
cable connecting?
YES
Does the pin 3
of IC203 change 0V to 3.3V
at the power supply initial
input mode?
YES
Are the X201, X301 oscillating?
YES
<Power>
•Is the pin 3 of IC304 3.3V?
•Is the pin 3 of IC303 2.5V?
YES
<Reference>
•1V(IREF):Check pin 109 of IC202
•1.5V(REFIN):Check pin 142 of IC202
•1.25V(REFOUT):Check pin 149 of IC202
•2.25V(REFI2):Check pin 12 of IC107
•2.25V(REF01):Check pin 13 of IC107
•2.5V(FPDVREF):Check pin 28 of IC107
•2.5V(REFI):Check pin 39 of IC107
•1.5V(REF02):Check pin 40 of IC107
YES
OK
RL-01A LOADER PART
NO
NO
NO
NO
3-98
•Check the power(5V,12V)short.
•Check the PC power cable.
•Repair the PC power supply.
•Check the IC304(3.3V reg.IC).
•Check the IC202,IC302
•Check the X201,X301
•Check the IC202,IC302
•Check the IC303,IC304