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You should first check the output voltages comes out from its main power regulator section; and to rectify the cause of this shut down first. Then only, there is any need to enter its service mode. If you're sound in electronics, and wish to get more details,
check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic
/ Time slide, can be selected by the drop-down list, at the top left
of the display window, will make surf easy. You can also do a search, by type in the brand name/model
number/IC used, in the search box at the top right of the display window. Service mode entry, adjust and exit procedure to many brand TVs are given in detail.
If you have a hot air gun like used for dry the hair, apply hot air on the vertical section, if the trouble is solved sure is an electrolitic capacitor, find it hoting one by one with de solder, if not, may be is the defletion yoke, the impedance is not less then 7 ohms.Another probe for the yoke: disconect the vertical wires and supply 12 VAC with a transformer to vertical coil and turn on the tv and watch, if the vertical size is ok, the yoke is ok.
TDA 8362B IC which have vertical freq.output is at pin no.43. (vert.osc)
for fixing this problem minimise brightness to avoid crt burn.
proceed as follows
1 if you are getting sawtooth at output of ic tda 8362 pin 43 then check
1 supply at vertical output ic from eht.
2 yoke connector loose .
3 check vertical output ic parts.
4 finally vertical ic.
please check for normal output from power supply even though fault gets rectified just for protection.
Timm,What you have Is Vert Failure,Toshiba is Noted for Bad Conns On the Vert Ic,Pull the Back off and Gently tap with a NonConductive Inturment and watch the Sceen Look for Heatsinks and Tap on those,If you know,or you caqn solder do so ,Do run the tv for a long time with no Vert or it will Cause BURN IN in the Phophurus
If you are getting static on screen you dont necessarily rule out the FBT, but if there is a fusible resistor by the FBT that is blowing it may be supplying current to the vert IC, the IC may be shorted internally or externally, check your connections and try replacing IC. Also check the pump up cap and if it is powered off the FBT the rectifier diode.
If hitting the set gets the vert to come back then you have bad solder connections on the vert. outputs.. If it dosent then your gonna need to measure the voltage first on the vert output IC see if its about 24 or so volts If it is replace the IC. If its not the replace the vert B+ drive capacitor off the flyback xformer. If you cant find these things then your gonna need to get a schemtic from sams photo facts and post the vertical section and I will tell you or assist youin this repair. If you have had experience in soldering and curcuit work your already ahead in the repair. post the schematic.
You dont have enough vertical sweep!! Best thing to check is the vert output device and I think its an IC . BUT before that check the b+ going to that device and see if its low. I will run through a silicon diode right next to the ic. Measure both sides of the diode and if theres a big voltage drop then the diodes bad. Now also these sets are common for the b+ filter cap off thge flyback transformer. Its the voltage line that feeds that diode and the vert output section. Now measure all caps out of cucuit as most will measure good if you dont. Also just for giggles right nrxt to the big IC that has the vert ,horizontal video and sound drive there is if im not mistaking the vert parts start with c4-- or the ic will be ic4-- Its a small cap that will sayc4-- attached to nothing but the ground and one pin of the ic. I've seen this cap cause all sorts of vert problems in the past as its the vert waveshaper capacitor for the vert osc/drive. Good Luck