Maker Pro
Maker Pro

Mitsubishi model CS35607 no blue

This set has no blue to the picture. I did some checking and found that
there is 225V on the collector of Q656 and it runs cold, while the
other two outputs run around 150V. (I'm assuming that Q656 is the blue
output). The other seemingly abnormal thing is that there appears to be
no signal on the base of Q653, while the other two transistors which
again I'm assuming are the red and green drivers have signal. (And
again since I have no schematic I'm making an assumption that Q653 is
the blue driver). So I'm going to have to look further however the
demodulated video signals seem to come from a vertically mounted board
which because of its placement will be almost impossible to
troubleshoot without a schematic or at least further help. Can anyone
please assist me with this set? Thanks very much for any help. Lenny
Stein, Barlen Electronics.
 
R

RonKZ650

Jan 1, 1970
0
Follow your wiring from the CRT board down to the chassis and look for
a small IC near there. It's only a simple 8 or 10 pin single row IC.
Forget the number and not near the shop now, but replacing the chip
should restore the blue, although chances are the problem may return
again in a few months.
 
L

Leonard Caillouet

Jan 1, 1970
0
IC6F01, AN5862K, IIRC. The problem should not return if you add the diode
modification as per the Mitsubishi service bulletin. I have never had a
repeat repair on one of these, using either the chips supplied by Mitsubishi
or from other vendors.

Leonard
 
S

stingray

Jan 1, 1970
0
leonard, can you email me a copy of this service bulletin. i have a
mits 35707 with no green and in termitent loss of blue once loss of red
with only blue then screen went black . are all ic's an5862k and what
is the diode? 125? and where to put it? sam
 
L

Leonard Caillouet

Jan 1, 1970
0
Just do a google search for the info. Help yourself before expecting techs
to waste their time doing your research for you. The info has been posted
previously in at least two technicians forums publicly available on the
internet referenced to the model number. It has likely been posted on this
group, too. Come on, guys, you didn't even need to ask the question if you
had looked. I pointed you in the right direction and with the info I gave
you probably would narrow the search to the specific answer. I don't mind
helping, but gee whiz, do I have to go look it up for you?

Isn't this kind of research routine and trivial for techs these days? I
spend a good hour of my day doing research to make my shop run more
efficiently and find fixes just like this all the time. Am I the oddball?
If I don't find a fix in the databases I have, the forums that I search, or
from the manufacturer, I always at least google it before expecting others
to look it up for me. Only after doing the research myself do I post a
question on the newsgroups, forums, or listserves.

I go out of my way for other techs all the time, but I know them and know
that they will reciprocate, that they have likely done their homework first,
and that they are qualified to use the info properly. I am not going to go
very far out of my way for someone who does not identify who they are and
the company that they work for. I will give advice from memory to anyone,
but if you want to stay anonymous don't expect much more.

Leonard
 
Leonard, I am not anonymous. I gave my name and company name in the
very first post. If YOU had taken the the time to read it before you
had written your unfortunate tirade you might have noticed that. I've
been a participant in this NG for many years. Just for the record most
of us are running shops here, so you are not in the minority. What you
are alone in however is being a person who instead of wanting to help a
fellow tech, you would rather insult their intellegence. I help people
too when I have the answer to a question. I don't dangle a carrot in
front of their nose with half a story. Just how many times have you
seen me ask for assistance in this column this year anyway? You would
think my sole mission in life was to waste your precious time. It just
so happens, and just for your information I did do an online search
for this problem, and gee whiz but I'm so sorry that I didn't find the
answer, and subsequently put you to all this trouble sir. I really
wouldn't have asked in the first place if I really didn't need the
help, but you have my sincere appologies for bothering you. Please,
don't bother to "help" me any more. Lenny Stein, Barlen Electronics.
 
L

Leonard Caillouet

Jan 1, 1970
0
The point of my "tirade" was obviously missed. That is, part of the job of
any decent tech these days should be to do internet research. Asking
questions is not a problem and I do not have a problem answering them and
helping other techs, even consumers, as my postings demonstrate. I would
not even post a question, however, without doing the basic searching first.
I have more respect for YOUR time than that, and am more professional than
to expect others to do my work for me. It is not as if the info was not
available to you.

A few things to consider:

I did not dangle a carrot. I gave the info that there was a mod and the
chip description from memory and assumed that you could do a little simple
searching for the details, like I would have to do if I needed the same
info.
Your last message was just signed Lenny, and I did not recognize you as a
tech. I responded to someone else's post, if YOU would notice from the
reply, and do not make a practice of going back to the original post when I
have something to contribute that does not require it. I read the usenet
groups intermittently exactly because there are more than just techs here.
I don't recall every mod, nor keep the info at hand at home.
A quick google search shows the info is available on the following:
network54.com
techassist listserve
wa6ati.com
euras.com
All but the last one have archives that are searchable to some degree for
free. Techassist has a great site with tips and other stuff available for a
pittance in a much more organized form than the freelists archives, but the
info comes up in a google search on this matter. Searching google with
"mitsubishi cs35607" gets this from techassist via the freelist archives
with just a few links checked:

replace ic6f01 part no.264p045040 and install a diode1s2471m with the anode
connected to the anode of d6xa1 and the cathode connected to the
cathode of d6f04

I don't think pointing out that you could have done that 2 minutes of
looking yourself is insulting your intelligence. It just points out that
you are either lazy or inconsiderate. Now go fix the set with the info that
I found FOR YOU.

Leonard
 
Leonard-
I looked at the siites you supplied and did find the WA6 one very
helpful, and not too hard to navigate. I'm not lazy, I'm busy like the
rest of us, but I'm just surprised that I never ran into that one
before. In any case in spite of the fact that I asked you not to help
me any more, you did and I do appreciate it. Lenny Stein, Barlen
Electronics.
 
Top