kelleyphd
Member
Did you figure out the problem? I am having the same problem.
Daniel
Daniel
G07 Blows F901 on Startup
- Thread starter Fudd
- Start date
OP
OP
Fudd
Active member
nope, changed out the flyback and still blew f901.....your's is most likely a issue with the hot.
kelleyphd
Member
I have a new flyback and hot and f901 blows everytime.
Daniel
Daniel
Mark Hooks
New member
No, that blows the large fuse IIRC
Mark Hooks
New member
I think a short in the deflection circuitry can cause this if fusible resistor 401 (FR401) has replaced with a non fusible resistor.
kelleyphd
Member
Thanks
I will check that. I just verified the HOT is still good.
I will check that. I just verified the HOT is still good.
Dokert
Well-known member
test both FR401 & R908
kelleyphd
Member
I took a look and the FR401 looks correct. It is the white rectangular type - 68 ohms, 2 watts. How is this tested?
Is it all corroded? Make sure the legs have continuity to the bottom of the board.
Dokert
Well-known member
just like a resistor
kelleyphd
Member
I appreciate the help. I assumed that but wanted to double check. I get 5.63K ohms for R908. I get 68 ohms for FR401. I have another chassis and I checked that one too and got 8.65K ohms for R908 and the same for FR401. Am I correct that the R908 should be about 47K ohms?
Daniel
Last edited:
Dokert
Well-known member
can't test R908 in circuit, need to lift one leg
kelleyphd
Member
OK, that make sense. I tested it and it has the proper resistance (47.3K ohms).
OP
OP
Fudd
Active member
worked on mine some more today, still the same result......something is shorting somewhere.....
OP
OP
Fudd
Active member
i need a second set of eyes, i can't find out whats wrong, view the link to help me out
http://picasaweb.google.com/gtapper/G07?authkey=Gv1sRgCNjd2rSxtpymGw&feat=directlink
http://picasaweb.google.com/gtapper/G07?authkey=Gv1sRgCNjd2rSxtpymGw&feat=directlink
OP
OP
Fudd
Active member
the big white resistor that the VR hooks to...
with nothing hooked to it i get around 220 ohm
with the white wire hooked to the VR i get about 30ohm
with all wires hooked up properly i get about 10-15 ohm..
i checked out a couple working chassis i have here and i should be able to measure 220 ohm with everything hooked up...this has got to be causing my short, but what?
the VR tests good, diode setting, red to case of VR and black to frame i get .463 and is brand new..
with nothing hooked to it i get around 220 ohm
with the white wire hooked to the VR i get about 30ohm
with all wires hooked up properly i get about 10-15 ohm..
i checked out a couple working chassis i have here and i should be able to measure 220 ohm with everything hooked up...this has got to be causing my short, but what?
the VR tests good, diode setting, red to case of VR and black to frame i get .463 and is brand new..
Dokert
Well-known member
Replace your VR, it is bad. You should be reading something with 4 digits.
OP
OP
Fudd
Active member
my meter is only reads or is set to 3 digits...i tested a known working VR and got .526
OP
OP
Fudd
Active member
got the VR figured out, wiring was causing some problems, got a good 220ohm on the white resistor now....fuse f901 (small fuse) still pops......not fun
Dokert
Well-known member
hot or fly or both
