Re: Marshall Stanmore Repair
how did you know that its shorted?
hann
Member
Last Activity: 06-12-2023, 12:12 AM
Joined: 07-31-2019
Location: Cebu
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Re: Marshall Stanmore Repair
its near on the pwm IC...Leave a comment:
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Re: Marshall Stanmore Repair
whu are you changing that parts?
is it defective?...Leave a comment:
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Re: Marshall Stanmore Repair
pls see attached...Leave a comment:
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Re: Marshall Stanmore Repair
pla see my drawn schem its near OB2269...Leave a comment:
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Re: Marshall Stanmore Repair
the pointer of my multimeter go straight to zero ohm and slowly going back. i thought its ok. but i already suspected the ecap as i have read on the datasheet. that it should charge to make the ic run....Leave a comment:
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Re: Marshall Stanmore Repair
I only tested that cap with analog multimeter that is i didn't see its bad. HeheheLeave a comment:
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Re: Marshall Stanmore Repair
thank you sir R_J...Leave a comment:
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Re: Marshall Stanmore Repair
sir R_J thanks for the input sir. i have found the fault. its the 3.3/50 volts e cap, replaced it then voila! power restored. i studied the datasheet on the pwm ic. the e cap doesn't charge that is why the ic wont start. a very big thank to you sir.Leave a comment:
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Re: Marshall Stanmore Repair
ZD3 on pcb with blue band, ss14 check out in the circuit, zd1 is ok....Leave a comment:
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Re: Marshall Stanmore Repair
there is full B+ on fet drain pin, both .1 ohms good, both windings were ok, diode us1m reads .412 volts and ss14 reads .144 on dmm diode test. 5.1 ohms good, 100/63 good....Leave a comment:
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Re: Marshall Stanmore Repair
sorry for the drawing, its parallel on the opto. thanks for the correction. great help here....Leave a comment:
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Re: Marshall Stanmore Repair
thank for the comment, i try measure it again.there is no markings on zener....Leave a comment:
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Re: Marshall Stanmore Repair
tested some voltage mark with arrows, but still no output...Leave a comment:
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Re: Marshall Stanmore Repair
here is my board and i drawn a schem to find the culprit...Leave a comment:
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Re: Marshall Stanmore Repair
hi im hann, my problem with stanmore is no power. On supply section. Already replaced pwm chip ob2269. Still to success.Leave a comment:
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