View previous topic :: View next topic |
Author |
Message |
SiliHead Guest
|
Posted: Mon Jan 03, 2011 5:46 am Post subject: panasonic TV TX-28F250A |
|
|
Hi
Need some help on fault finding.
This TV started going off focus over time.
It now has bright horizontal lines when it is turned on.
After about 30 seconds it switches the screen off & seems to go to standby mode.
There's a red blinking LED at the power switch.
This chassis may be same as the TX-32F250A.
1. What voltages should I look for? and at which points?
2. What components should I check for short or open circuits?
Cheers |
|
Back to top |
|
|
Guest
|
Posted: Sun Jan 09, 2011 5:35 pm Post subject: |
|
|
It might be the GP2 chassis. Try to find out which it has. If it is the GP2, check these:
- IC880 temperature sensitive (with small black heatsink to the right of the tuner). 9V at CRT socket L2 pin 1 drops to approximately 7V, then appliance switches off.
- IC371 defective. Check resistors associated with the circuit.
- D558 is S/C and R57 is O/C. |
|
Back to top |
|
|
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Service Manual Search -
Jabse.InK -
onTap.bg
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
FFH-376 trouble LG • Canon BJC-8200 Service Manual CANON • 04vari NOKIA • 019ABLK LG • 2sa1815 Sanyo • Philco PH42LED A2 LED TV SM PHILCO • 19 Marantz • L20V36 ZENITH • Aqarius CTD00 Hotpoint • 2raars NOKIA •
|