Hello,
Got two of these that won´t power up.
PSU is IP-35155A, inverter transformer is TM-0917.
First one got bad caps in the 5V line C109 and C110 ( two 1000 uF x 10V, Samwha XC ) . Swapped them and the one 820 uF x 25V near them. ( C113 , also Samwha XC ).
Well, now the psu gives correct voltages in the CN2 connector, with and without the logic board connected.
Then the other : none of the caps were bulged. Just to be sure, I swapped most of the caps ( C190 and C110 , 1000uF x 10V, C113, C112 and C316, 820uF x 25V ). All were Samwha XC.
Connecting just the psu gets the voltages in the CN2 connector ok. Starting it up with the logic board connected gives just about 1V in the 5V line, and 3.something in the 15V line.
Have swapped C107 ( 47uF x 50V SamYoung LXV) and the controller ( FSDM0465R ) to no avail. Have also tried with both logic boards, it made no difference.
Now for the interesting part :
If I connect just the IP board, turn it on, measure the voltages to see it is working, turn it off. Wait for the big cap to discharge, then connect the logic board and turn the thing on, it will not start ( Voltages between pin 2 - 3 of the D0465 stay around 9.7 - 10.3V ) . Output voltages in 1V for 5V and 3.2 for 15V.
But if I connect the logic board before the big cap has time to discharge fully, and turn power again fast, the smps will start, voltage between pin 2-3 will be around 12.4V, and output voltages are ok ( 5.1V and 14.7 - 14.9V ) .
As I have the two boards , and one seem to work, I´ve tried :
Swapping the NTC TH101 ( 5 ohms, SCK-053 ). No difference.
Swapping the big cap ( Samwha WL 100uF x 400V ) . No difference. By the way, in the other board it is a SamYoung KMF 100uF x 400V.
Any suggestion of other things to troubleshoot ?
Got two of these that won´t power up.
PSU is IP-35155A, inverter transformer is TM-0917.
First one got bad caps in the 5V line C109 and C110 ( two 1000 uF x 10V, Samwha XC ) . Swapped them and the one 820 uF x 25V near them. ( C113 , also Samwha XC ).
Well, now the psu gives correct voltages in the CN2 connector, with and without the logic board connected.
Then the other : none of the caps were bulged. Just to be sure, I swapped most of the caps ( C190 and C110 , 1000uF x 10V, C113, C112 and C316, 820uF x 25V ). All were Samwha XC.
Connecting just the psu gets the voltages in the CN2 connector ok. Starting it up with the logic board connected gives just about 1V in the 5V line, and 3.something in the 15V line.
Have swapped C107 ( 47uF x 50V SamYoung LXV) and the controller ( FSDM0465R ) to no avail. Have also tried with both logic boards, it made no difference.
Now for the interesting part :
If I connect just the IP board, turn it on, measure the voltages to see it is working, turn it off. Wait for the big cap to discharge, then connect the logic board and turn the thing on, it will not start ( Voltages between pin 2 - 3 of the D0465 stay around 9.7 - 10.3V ) . Output voltages in 1V for 5V and 3.2 for 15V.
But if I connect the logic board before the big cap has time to discharge fully, and turn power again fast, the smps will start, voltage between pin 2-3 will be around 12.4V, and output voltages are ok ( 5.1V and 14.7 - 14.9V ) .
As I have the two boards , and one seem to work, I´ve tried :
Swapping the NTC TH101 ( 5 ohms, SCK-053 ). No difference.
Swapping the big cap ( Samwha WL 100uF x 400V ) . No difference. By the way, in the other board it is a SamYoung KMF 100uF x 400V.
Any suggestion of other things to troubleshoot ?
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