Sam Goldwasser wrote:
bigtom writes:


Sam Goldwasser wrote:

"James Sweet" writes:


"bigtom" wrote in message
...


TPG 17" monitor Model TP785XE

No HV, led comes on, heater glows, HOT ok.

i tested the resistance from the flyback anode(big red wire) to chassi
and got a reading of 2.68M ohm.

is it a faulty flyback?


It could be, but it's more likely something else. Do you have B+ at the HOT?

If you measured 2.68M ohm or lower in both directions between the
anode cap and anyplace else, the flyback is bad. The resistance
should be in the hundreds of M ohmz to infinity range.

i had another look and measured the resistance both ways but now im not
getting any readings. the monitor has been inside next to the heater.
maybe temp. is affecting readings?


Even if it was baking, the resistance shouldn't be less than a few hundred
M ohms, and probably not less than infinity on a typical meter.


i did a few voltage measurements at the crt pins with the 40w lamp
across C/gnd.


Do you mean HOT C to ground? Not sure what that proves other than you
have B+, which from a previous post, sounded like it might be reasonable.


G1 20v
G2 167v


This is probably low, but due to your meter loading the circuit.


G B & R 120v


If I interpret what your saying here, in cutoff.


HTR 7v



if its not the flyback and i have B+ then what should i look at next?


Did you try turning up the G2 pot to see if you can get a raster?

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i put the HOT back in and tried the G2 pot, no raster.
tried a neon globe around the flyback but it doesnt light up.
theres a fluttering sound coming from the yoke area(deflection circuit?)
G2 on the crt pin has gone up from 167v to 242v.