Goodmans W325NST E/W fault


	FORUM HOME	SEARCH POSTS	WHO'S ONLINE	LOG IN	RULES F.A.Q.

TV Forums: TV Equipment: TV Repair Forum:
Goodmans W325NST E/W fault

Print Thread

PurpleRoadie
Novice

May 19, 2008, 8:43 AM

Post #1 of 21 (224 views)
Shortcut

Goodmans W325NST E/W fault	Can't Post

I have a Goodmans W325NST tv with an East/West fault. It has the FPC2001 twist Chassis. The screen width has shrunk and is pinched in at the sides.

techchris
Veteran

May 19, 2008, 5:45 PM

Post #2 of 21 (214 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

probably the east/west correction diodes are faulty

PurpleRoadie
Novice

May 27, 2008, 8:29 AM

Post #3 of 21 (195 views)
Shortcut

Re: [techchris] Goodmans W325NST E/W fault [In reply to]	Can't Post

which diodes are these, part no's? tested various components in the circuit, i do appear to have a short across R167 and L19, could this cause the fault

techchris
Veteran

May 27, 2008, 8:40 AM

Post #4 of 21 (191 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

usually BA148 and BY228 in series across horizontal out transistor.No manual so i dont have part numbers or positions,but they are near the flyback transformer.

PurpleRoadie
Novice

Jun 24, 2008, 5:36 PM

Post #5 of 21 (160 views)
Shortcut

Re: [techchris] Goodmans W325NST E/W fault [In reply to]	Can't Post

ok finally got a full picture back but now need to know how to set the geometries up, i have something that says for service mode press OSD (i presume its the M button) near power switch on tv and OFF on the remote, but this does not work. any help appreciated.

(This post was edited by PurpleRoadie on Jun 24, 2008, 5:38 PM)

ernie
User

Jun 24, 2008, 7:33 PM

Post #6 of 21 (155 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

service mode HOLD IN VOL+ ON TV AND R/C STBY, SWITCH ON AT MAINS SWITCH

PurpleRoadie
Novice

Jun 25, 2008, 2:12 PM

Post #7 of 21 (151 views)
Shortcut

Re: [ernie] Goodmans W325NST E/W fault [In reply to]	Can't Post

this does not work

techchris
Veteran

Jun 25, 2008, 4:09 PM

Post #8 of 21 (147 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

you have to press them really fast or it wont work

PurpleRoadie
Novice

Jun 29, 2008, 10:45 AM

Post #9 of 21 (135 views)
Shortcut

Re: [techchris] Goodmans W325NST E/W fault [In reply to]	Can't Post

had to press M on tv and OFF on r/c at same time and YELLOW to save settings

PurpleRoadie
Novice

Jul 3, 2008, 8:00 AM

Post #10 of 21 (123 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

the tv has gone faulty again, it appears R114 is getting burning hot to the touch, what could be causing this, TR15 has been replaced with an equivalent part just slightly higher rated

rrobor
Veteran

Jul 4, 2008, 6:16 AM

Post #11 of 21 (114 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

The shut off speed is wrong, If you replaced diodes they need to be fast switching, or your transistor is too slow.

PurpleRoadie
Novice

Jul 6, 2008, 1:18 PM

Post #12 of 21 (106 views)
Shortcut

Re: [rrobor] Goodmans W325NST E/W fault [In reply to]	Can't Post

replaced D21 and D22, parts came from a tv repair shop, will replace TR15 back to the old one, i presume this was ok, now also left with just a bright white line in middle of screen

rrobor
Veteran

Jul 7, 2008, 4:06 AM

Post #13 of 21 (97 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

I would question what you are doing. You started out with a pin correction issue, now you have killed the vertical scan. I can find no lagical connection, well there is a vague issue but highly unlikely. The most common issue is you did something that you are not telling us about, so what are you doing? Rob

PurpleRoadie
Novice

Jul 7, 2008, 6:39 AM

Post #14 of 21 (94 views)
Shortcut

Re: [rrobor] Goodmans W325NST E/W fault [In reply to]	Can't Post

i have left nothing out, i just want to get this fixed, if i have killed something i dont know what it is

techchris
Veteran

Jul 7, 2008, 4:15 PM

Post #15 of 21 (91 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

is the line vertical or horizontal?

PurpleRoadie
Novice

Jul 7, 2008, 5:06 PM

Post #16 of 21 (88 views)
Shortcut

Re: [techchris] Goodmans W325NST E/W fault [In reply to]	Can't Post

horizontal

techchris
Veteran

Jul 8, 2008, 4:20 AM

Post #17 of 21 (84 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

check you have about 25-35 volts supply on one pin of the vertical ic which is on a finned heatsink near the flyback transformer. if not then the feed comes from the flyback via a low value resistor and diode in series. if the voltage is there then the ic has probably died and needs to be changed.BTW did this occur after the other parts were changed or did the tv work for a while then fail again?

PurpleRoadie
Novice

Jul 8, 2008, 12:58 PM

Post #18 of 21 (78 views)
Shortcut

Re: [techchris] Goodmans W325NST E/W fault [In reply to]	Can't Post

worked for a few days after the parts were changed

techchris
Veteran

Jul 8, 2008, 1:42 PM

Post #19 of 21 (74 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

probably the ic has croaked then.

PurpleRoadie
Novice

Jul 13, 2008, 12:46 PM

Post #20 of 21 (63 views)
Shortcut

Re: [techchris] Goodmans W325NST E/W fault [In reply to]	Can't Post

looks like the ic had croaked could only get 16.7V on pin 7 of i/c and 10V at one side of R169. and for further complications no screen at all just a beep form the board, so now 1 fault has turned into 3, help

techchris
Veteran

Jul 14, 2008, 3:54 PM

Post #21 of 21 (56 views)
Shortcut

Re: [PurpleRoadie] Goodmans W325NST E/W fault [In reply to]	Can't Post

i think you are getting in too deep and things are going from bad to worse.take it in for repair or cut your losses and dump it.

Print Thread

Search for (options)

Web Design by Web Ideas - Page loaded in: 0.30 s on (CGI/1.1)