820-3435 , PP18V5_DCIN_ISOL_R is low

[rubelpabel@gmail.com]

hi ,
board no 820-3435
R7005 pin 1 : 16.5v
pin 2 : 3.0v
changed U7090 : still same
L7095 diode value is 0.335 both side
if make jumper r7005 pin 1 to D7005 pin 3 board turn on ,,,
help me pls

 

[2informaticos]

"R7005 pin 1 : 16.5v
pin 2 : 3.0v"
Change R7005...

 

[rubelpabel@gmail.com]

changed ... still same

 

[2informaticos]

Is R7005 10 ohms?

 

[rubelpabel@gmail.com]

yes but not sure . i will chk tomorrow

 

[2informaticos]

Is not normal to have such voltage over 10 ohm resistor.
It should get really hot.
Because you've said board works when bypass R/D7005.
Change C7090-92 and D7005 too.

 

[rubelpabel@gmail.com]

Its done after change R7005 , ( allready changed before but that R7005 also damaged )
it was 280 ohms ..
tnx .

 

[2informaticos]

So you didn't even measure the resistor when I asked you .
You should have the machine repaired yesterday...

 

[rubelpabel@gmail.com]

acctually i was at home that time ... i thaught i changed the R7005 it will good . sorry about this