G07 Perfect Picture, B+ 148v

sconfu

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new flyback, hot, width coil, caps

B+ at end of R1 will vary from 147.5v to 148v with pot adjustment

other end of R1 that comes off hot is 155v

tested the pot for b+, checks good goes from 8 to 2.07k ohm

ceramic resistors check out ok

X04, X901 and X902 check out ok , swapped from good board, still same problem

start looking at 900 Resistors?

any ideas?
 
Last edited:
replaced R908, now b+ stuck at 108v.

getting better but no cigar

will check more Rs
 
I just finished a chassis with a similar problem. The B+ was wandering between 155 and 172 vdc yet producing a nice but wide and wavy picture. Mine ended up being an open R908

Try your X902 or the R910 resistor or your B+ pot
 
B+ at end of R1 will vary from 147.5v to 148v with pot adjustment

other end of R1 that comes off hot is 155v

Just to clarify, you mean the end that connects to the Regulator 2sc1106?

The HOT is on the other side of the chassis next to the fly.
 
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