Okay, I am in the process of repairing my JVC AV-56WP84 Rear Projection
Television. I found component Q522 shorted which is JVC part number
2SC5904-RL. JVC wants $45.57 for a new one. It has been quite some
time since I repaired a television and I design electronic circuits for
a living. Since when does it cost that much money for a transistor?
So my questions a 1. Where can I buy this component for a better
price? 2. Is there a cross reference I can use?
Here are some additional JVC part numbers I would like to cross:
1. D932 JVC part number 31DF6N-FC5 JVC wants $10.06
2. IC805 JVC part number STK394-220 JVC wants 48.94

Thanks for the help
Kevin

How did the set fail? Convergence IC failure usually doesn't kill the
horizontal output. Q522
is the output transistor, you MAY have a high voltage capacitor, or
even the flyback MAY be bad, or just cold solder joints @ T 501
horizontal drive transformer. Also, check C 503 2.2 uf @ 50 volt cap in
the drive stage. Does Q522 measure shorted out of circuit? Change IC
805, & IC804 in pairs, & don't use generic IC's. Check CP934 circuit
protector ( ICP-N70-T), on the + 13.5 volt line. It's an IC PROTECTOR.
2.5A.


There are two versions of this T.V. AV-56WP84, or AV-56WP84HA ( HA
would be at the end of the serial number).
Look he http://www.globalsemi.com/ Mississauga, Ontario Canada.
2SC5904-RL is $31.97 each. Datasheet he

http://pdf1.alldatasheet.com/datashe...C/2SC5904.html

Hope this hepls, Dani.

Hello Dani
I purchased this TV from a private party as non-working. I was told
that Q522 (2SC50804-RL) was shorded. When I took the set apart Q522
was missing. Currently when the set is turned on without this IC the
front LED turns on as normal, the speakers make some noise for a moment
and the screen is blank and all the CRT lamps are dark. So I believe I
need to replace this IC before I spend additional time troubleshooting.
I check most of the diodes (in circuit) with a meter and found D932
shorted which is JVC part number 31DF6N-FC5. So my plan for now is to
order Q522, D932 (Do you have a cross for D932?), IC804, IC805 and all
the parts you just recommended except T501. When these new parts are
installed I will start troubleshooting again. I am hoping nothing is
wrong with the lamps or Picture Tubes. I will also carefully check the
solder joints and PCB around T501.

Kevin

wrote:
How did the set fail? Convergence IC failure usually doesn't kill the
horizontal output. Q522
is the output transistor, you MAY have a high voltage capacitor, or
even the flyback MAY be bad, or just cold solder joints @ T 501
horizontal drive transformer. Also, check C 503 2.2 uf @ 50 volt cap in
the drive stage. Does Q522 measure shorted out of circuit? Change IC
805, & IC804 in pairs, & don't use generic IC's. Check CP934 circuit
protector ( ICP-N70-T), on the + 13.5 volt line. It's an IC PROTECTOR.
2.5A.


There are two versions of this T.V. AV-56WP84, or AV-56WP84HA ( HA
would be at the end of the serial number).
Look he http://www.globalsemi.com/ Mississauga, Ontario Canada.
2SC5904-RL is $31.97 each. Datasheet he

http://pdf1.alldatasheet.com/datashe...C/2SC5904.html

Hope this hepls, Dani.

My set is model number AV-56WP84. I am not sure what the difference is
when the HA is added.

Kev wrote:
Hello Dani
I purchased this TV from a private party as non-working. I was told
that Q522 (2SC50804-RL) was shorded. When I took the set apart Q522
was missing. Currently when the set is turned on without this IC the
front LED turns on as normal, the speakers make some noise for a moment
and the screen is blank and all the CRT lamps are dark. So I believe I
need to replace this IC before I spend additional time troubleshooting.
I check most of the diodes (in circuit) with a meter and found D932
shorted which is JVC part number 31DF6N-FC5. So my plan for now is to
order Q522, D932 (Do you have a cross for D932?), IC804, IC805 and all
the parts you just recommended except T501. When these new parts are
installed I will start troubleshooting again. I am hoping nothing is
wrong with the lamps or Picture Tubes. I will also carefully check the
solder joints and PCB around T501.

Kevin

wrote:
How did the set fail? Convergence IC failure usually doesn't kill the
horizontal output. Q522
is the output transistor, you MAY have a high voltage capacitor, or
even the flyback MAY be bad, or just cold solder joints @ T 501
horizontal drive transformer. Also, check C 503 2.2 uf @ 50 volt cap in
the drive stage. Does Q522 measure shorted out of circuit? Change IC
805, & IC804 in pairs, & don't use generic IC's. Check CP934 circuit
protector ( ICP-N70-T), on the + 13.5 volt line. It's an IC PROTECTOR.
2.5A.


There are two versions of this T.V. AV-56WP84, or AV-56WP84HA ( HA
would be at the end of the serial number).
Look he http://www.globalsemi.com/ Mississauga, Ontario Canada.
2SC5904-RL is $31.97 each. Datasheet he

http://pdf1.alldatasheet.com/datashe...C/2SC5904.html

Hope this hepls, Dani.