[tvservice] Re: Mitsubishi cs-20203
- From: "Mo Dale" <feys@xxxxxxxxxxx>
- To: <tvservice@xxxxxxxxxxxxx>
- Date: Fri, 5 Dec 2003 18:36:54 -0600
Replace "Shorted" Hor. Output Transistor Q602 - D2095 (Replaced With =
D2499).
Replace R719 - 5.6 Ohm 5 Watt "Stand-Off Resistor".
Only tech tip I had...
Suggest that you bring up set with collector of new HOT unsoldered...& =
check
B+ [`135vdc]
Usually if the HOT shorts, then the B+ goes too...
If this resistor R702 is in line with B+ then I would still examine =
supply
for HOT...
If the fuse & bridge good ... [And is a switch mode] see if primary is
working 160 dc [raw B+ off bridge]... 315vac [from chopper/regulator]to
primary side of SMPS x-former... If that good, then recifier on
secondary...that and resistor to that ckt..
Call me 1877-799-0971
9-1 cst...sat.
Mo Dale
Fey's Electronics
2027 S. Main St. Suite 2
Bloomington, Il 61704
FON 309-829-7151
FAX 309-829-0619
Feys@xxxxxxxxxxx
-----Original Message-----
From: tvservice-bounce@xxxxxxxxxxxxx =
[mailto:tvservice-bounce@xxxxxxxxxxxxx]
On Behalf Of Matthew McNeely
Sent: Friday, December 05, 2003 12:29 PM
To: tvservice@xxxxxxxxxxxxx
Subject: [tvservice] Mitsubishi cs-20203
I am trying to repair a Mitsubishi cs-20203. it was dead and I have =
found=20
that the horizontal output transistor Q602 is shorted and that fusible=20
resistor R702 is open. I am assuming that the output transistor shorted =
and=20
then the fusible opened because of the excessive current. is there =
anything=20
else that I should look for before I install the new output transistor =
and=20
fusible resistor?
Thanks in advance,
Matt
Matthew E. McNeely
Electronic Engineer
Brandeis University
Physics Department
415 South St.
Waltham,Ma. 02454
MS057
Phone 781-736-2824
Fax 781-736-2915
Pager 781-496-7274
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