Looking for a hitachi 3390fsp smps circut

Replace that STR. Before replacing, check all the related component/s at the SMPS section [HOT] side. any one damaged component will make the replaced STR to fail. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
SMPS Circuit diagrams [STRW6754] of many popular brand TVs and other devices are given.
Search the site by type in the "BRAND NAME" or the STR number; of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" or the "STR number" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts.

This is the SMPS Power suply drive and the IC fails ONLY if there is fault in the circuit. You need to check on the SMPS section
check this link below for tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Next you need to check if the LINE output transformer has failed. If so this will have a higher current drain and so switch off the SMPS unit. check for the EHT drivers, capacitors in the HT circuit.

Refer to Hitachi Canada for Electrical Board Circuit Reference...
Or.... From the net On any Browser Type....Download Hitacchi Model board !.... Manufacture Number serial code.. ext. chose the one you need But Be Patient, Good Luck.

circuit diagrams exist at the factory where they were designed. Though I have looked before they cannot be found. I do not believe they exist.

pls. open H-output trangister and out side of pcb and check voltage B+ 135v dc is ok ?.
if yes.then ...H-OUTPUT trangister checked and replace
if not then check SMPS .
1.fuse
2.STR
3.output Dyode
check
1st fuse is open then check rectifier dyode cantunity. if sort then replace all 4 dyode.(rectifier)
and if dyode is ok .then check STR cantunity is sort then Replace with New STR but 1st 220uf/450v dc capaciter cheked / 2nd. in SMPS stage any P.F and capciter likage or sort cheked or chenged first after the NEW STR use
*. note: smps pcb checkd any dry canaction pls. Resolder first.

If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts. Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

your model uses two STK392-110 Convergence ICs. Hitachi also recomends replacing the feed resistors which are two 2.2 ohm 1watt, two 1.5 ohm 1watt, one 3.3 ohm 1watt and one 1.8 ohm 1watt resistor. You can get repolacement ICs and resistors at the following link and they provide step by step installation instructions with pictures. Heres the link.
http://servicemanuals.vstore.ca/

smps is not working

please see web site www.eserviceinfo.com hitachi model no c-3390fsp tv component detail &circuit design for more details of ckt diagram thanks