FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Electronix » Repair
philips no hv
Post new topic   Reply to topic Page 1 of 1 [1 Post] View previous topic :: View next topic
Author Message
yhan
electronics forum beginner


Joined: 13 Sep 2005
Posts: 36

PostPosted: Thu Jul 20, 2006 1:19 am    Post subject: philips no hv Reply with quote

hi!

philips monitor 14" model no: 104s12, chassis: CM214.

Checked voltage in the primary and secondary of the low voltage psu.
Voltages are with right specs. (I based the voltages in the volts value
of primary & secondary caps.). The heater is lit upon turn on. But
there is no static on the screen. There is no indication of hv. HOT is
ok. There is no voltage on the collector of the HOT when measured. So
follow the supply line. What I discover is a different design from
which I am familiar with (design of most monitors I repair). Usually
the primary pins of the flyback transformer where collector of the HOT
is connected is physically beside each other. This one is different.
Flyback pin no. 1 is connected to the collector. I thought pin no. 2 is
the the other side of the primary winding but its connected to ground.
I cant figure out now the other side of the flyback primary winding so
i cannot trace now where the collector voltage of the HOT is being
lost. There are other components connected to the collector through
jumper wire. But I dont trace the collector voltage there because what
I know is collector voltage that comes from the main supply passes
through the primary winding of the flyback.
If anyone is familiar with this monitor. Please advise me.

I resoldered already every suspected cold solder in the mainboard and
crt board.

thank you....



Ian
Back to top
Google

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 1 of 1 [1 Post] View previous topic :: View next topic
The time now is Tue Dec 11, 2018 10:20 pm | All times are GMT
Forum index » Electronix » Repair
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts Philips Zener Diode Values and Power transistor ydoubleuz@gmail.com components 2 Tue Jul 18, 2006 12:43 am
No new posts help for videoprojector lcp5000/10r philips lukez Repair 0 Thu Jul 13, 2006 9:54 am
No new posts Need Philips AZ9001 service manual Unomano Repair 0 Sun Jul 09, 2006 6:16 pm
No new posts Philips PM2525 manual request Bertrand Equipment 0 Sat Jul 08, 2006 4:04 pm
No new posts Philips XFMR's for trade or??? Barry & Nikki components 1 Thu Jul 06, 2006 11:42 pm

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums |  Medicine forum |  Science forum  |  Send and track newsletters


Powered by phpBB © 2001, 2005 phpBB Group