Copyright A.Mionnet (created
11/08/2007 updated 21/08/2007)
Trouble on power
This page is on the
report of the failure of 2* WBL-3265PW sub-assembly used on
Most of chimical capacitor
(ELNA manufacturer, brown color) may have a small electrolyte leakage
on the main board.
Unfortunately this may stop the
Power supply investigated
is DPS-002190.(older may be DPS-002093)
DPS date code 92-1: failure end
of 2001 (installed on R3271), the power supply was replaced by a new
I investigate the old one, that
have been kept, few days ago. (small electrolyte leakage, under C142
pattern + 20v / -15v burnt (carbon)).
80 to 90 % of Elna capacitor
have a small electrolyte leakage.
DPS date code 92-2 failure now
(installed on R3265) also the fan seems not powered and the internal
temperature seems have been increased before the failure.(small
electrolyte leakage, under C142 + 20v pattern cutted) cleaned and the
pattern repaired, the instrument is temporary ok. (the problem for
the fan must fixed and all the capacitor renewed)
A third instrument have no
DPS date code 92-1 no failure
(installed on R3271) (small electrolyte leakage) The board will be
The big but thin power
supply.... top/bottom boards (All ELNA capacitors are removed and 80%
replaced by Panasonic FM capacitors on this picture)
DPS date code
Burnt under C142
After a simple cleaning (C52
was removed in order to have an easier access), less than 90 Ohms
found between -15v and +20v pattern. The power supply switches in
After complete cleaning (carbon
powder removed) > 1 MOhm , the power supply is ok but all chemical
capacitors must be renewed. This have started with Panasonic FM serie
DPS date code
Pattern is cutted...for the
+20v output. Then the current sense detect an overload and the power
supply switches in security mode.
Now the reason why
the fan don't run....
CN3 connector is for the
The pattern is also cutted
under C30, then no power on the connector for the fan.
On this board the leakage
was more important but the run time was shorter.
R3265/3271 have the same failure, please give details
To be continued....