Quote:
Originally Posted by zeno
For manual
IIRC KV30HS420 was the common model with 2 IC's. Its SAMS 5162.
SAMS KV34..... models are 5429, 5398, 5460. No XBR's listed.
Try running on SAMS the chassis number SCC-### without varieties,
just the chassis family.
Only remember bad IC's & one or two FBT's on these sets. If the blink is for
over current its probably the FBT.
To test start the set a few times & see if the HOT is getting hot !
Another test is unplug the DGS, turn set on, watch the current.
If it goes over 1 amp usually FBT. Normal running current is @.8 amps.
And finally dont forget this has two or three grounds so gotta use the
right ground point for measurements.
73 Zeno 
LFOD ! |
I'm going to stick with the factory manual. I don't have any Sam's above 1800 as typically 1970s Zenith Chromacolor II sets are the only solid state sets I'll touch, don't have budget to be buying from Sam's.
I had to turn it on a dozen times (goes into shutdown within 2-3 seconds so measuring 26 pins takes time) to take measurements and the flyback FETs stayed cool.
EDIT: Also looking at the schematic the Horizontal deflection doesn't come from the flyback on the DA-4 sets. The flyback only makes HV. And the horizontal sweep is it's own independent circuit separate from the HV supply for the CRT.....Sort of like a late 1940's electrostatic TV...What's old is new again.