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Hi,
Installed cap kit to Welss Gardner K7000 and new flyback transformer. After few weeks and only few games played, monitor blows fuse.
Chassis is P447. Checked all diodes (out of circuit) and all are ok.
Main suspect is IC4 STR3123 regulator. R301 and R302 are parallel with IC4 pins 1 and 4.
Measured both resistors R301 and R302 and those are ok.
Diode testing (in circuit testing) IC4 pins 1 and 4 multimeter shows 0.002 V (both ways). Resistance over pins 1 and 4 are about 2 ohm.
Is that IC4 the reason why fuse blows?
When I removed resistor R103 and put power on then fuse stays ok, degaussing coil was disconnected during this test.
Q11 2SD1398 transistor changed, but not tested to play the game after that, because need to be sure that everything else is ok.
I don't have new IC4 yet, so can't make comparison. What is the correct resistance between IC4 pins 1 and 4?
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