Hello i am working on a tv and need to replace the HOT (horizontal output transistor) which is a panasonic 2SC5904, but i cannot find this part for sale any where online and was wondering if anyone here knows of a good alternative for it that i can buy.

 

Hello i am working on a tv and need to replace the HOT (horizontal output transistor) which is a panasonic 2SC5904, but i cannot find this part for sale any where online and was wondering if anyone here knows of a good alternative for it that i can buy.

If you have a circuit diagram,compare the circuitry with that of another similar TV.
Some years back,we used to replace the 2SC series HOTs in Sony Profeel picture Monitors with Philips BU208D Transistors used in 27" Philips TVs.
Sony were very good at quick parts supply,but the Philips devices were either in our store,or locally available.

 

Have you tried lookingat ebay? But anyway see if this help you http://alltransistors.com/crsearch....e=600&ueb=7&ic=17&tj=150&ft=3&cc=0&hfe=5&caps=

 

2sc5905 will do or Bu208d

 

Have you tried lookingat ebay? But anyway see if this help you http://alltransistors.com/crsearch....e=600&ueb=7&ic=17&tj=150&ft=3&cc=0&hfe=5&caps=

my only issue with the ones from ebay is that they are used i would rather buy a new one than buy one that may have been pulled from a bad set

edit after checking Bu208d it would not work as there is not enough room for that type of hot on the board

 

Yeah,BU208D is a T03 package---try BU508D which is in a similar package to your original one,& if I remember correctly,is electrically identical to the BU208D.

 

2SC5904; Polarity: NPN
Maximum collector power dissipation (Pc), W: 65
Maximum collector-base voltage |Ucb|, V: 1700
Maximum collector-emitter voltage |Uce|, V: 600
Maximum emitter-base voltage |Ueb|, V: 7
Maximum collector current |Ic max|, A: 17
Package = TOP-3E-A1

It has NO body diode, so you can't use a BU508D, you should use a BU508.

But a BU508 is probabaly not large enough Ic? The 5904 is rated for 17A Ic and peak Ic of 27A! That's quite high. It must be a real big screen TV.

(edit) the 5904 datasheet direct link is here;
http://alltransistors.com/pdfdatasheet_panasonic/2sc5904.pdf

 

thank you all for all your help, i went online and looked up how to test these transistors with my meter and the HOT tested fine so thats not it, however i tested Q504 which im not sure what it is yet, but anyway i tested one leg and got a reading and then i tested the other and didnt get anything at all, im thinking whatever Q504 is, its bad and needs to be replaced, now i just need to find a diagram and find out what exactly it is and see if i can find a replacement

 

for some reason i cannot edit my post above, but i desolder the part and using a magnifying glass i got the following off of it

ST w3s428

p15nk507

 

Why bother repairing a old eol crt tv ? Lcd/plasma is much higher quality picture and much higher resolution than any blurry worn out phosphor crt can ever dream of.

I threw out everything crt years ago and never wanna go back ever again.

 

Why bother repairing a old eol crt tv ? Lcd/plasma is much higher quality picture and much higher resolution than any blurry worn out phosphor crt can ever dream of.

I threw out everything crt years ago and never wanna go back ever again.

before this tv died it had a great picture, plus its free and i plan to use it with my video game consoles, but i also love fixing things and i like a challenge

 

For a gaming console, an old crt tv is the last thing i'd use. Ive used a plasma for 4-5 years now and i cannot even tolerate beeing near a crt tv anymore, that high pitched whine and flickery picture gives me epilepsy.

 

For a gaming console, an old crt tv is the last thing i'd use. Ive used a plasma for 4-5 years now and i cannot even tolerate beeing near a crt tv anymore, that high pitched whine and flickery picture gives me epilepsy.

i like crt better for stuff like my consoles from the 80's and 90's but to each their own, if anyone knows what that part is and may know of a alternative please let me know thanks

 

I'd say pretty much any transistor with similar voltage, current and hfe(current gain) rating in the same package and same pinout as the original will work.

 

I'd say pretty much any transistor with similar voltage, current and hfe(current gain) rating in the same package and same pinout as the original will work.

only thing is i cant find any info on it on google unless im using the wrong number or something

EDIT ok i found the service manual and found this for Q504

Q504 AE004387 TJXG15NK50 FET STP15NK50ZFP

 

oops sorry wrong forum for that reply

 

That Q504 looks more like the main psu switching fet. The HOT is usually a 1200V rated bipolar transistor from what i remember.

 

Why bother repairing a old eol crt tv ? Lcd/plasma is much higher quality picture and much higher resolution than any blurry worn out phosphor crt can ever dream of.

I threw out everything crt years ago and never wanna go back ever again.

LCD is OK,but Plasmas look like an analog CRT TV with differential phase problems!

 

LCD is OK,but Plasmas look like an analog CRT TV with differential phase problems!

Uh WRONG!!! LCD and plasma look flawless compared to any crt i ever seen.

I cannot stand crt at all, gives me nausea, headaches and epilepsy.

 

Uh WRONG!!! LCD and plasma look flawless compared to any crt i ever seen.

Some old technology like light guns on old consoles/computers don't work without a CRT. Also some people like the retro look of scanlines.

Beauty is in the eye of the beholder.