Resistor question

[1supertech]

Re: Resistor question

test in ohm R903/4/5

Ok I found them meter set at 20k
R903 3.29 K
R904 3.29k
R905 3.2k

[budm]

Re: Resistor question

Post 25.

q207
b&c 0.02
c&e 0.00
b&e 0.02

q206
b&c 0.01
c&e 0.00
b&e 0.02

q203
g&s 0.00
g&d 0.02
d&s 0.02

[Davi.p]

Re: Resistor question

supertech read what budm said, you have to dismount the 3 inverter transistors and retry..

[1supertech]

Re: Resistor question

Q206
B&C 0.L
C&E 26.32
E&B 26.55

Q207
B&C 0.L
C&E 25.31
E&B 25.92

Q203
G&D 0.L
D&S 11.82
S&G 0L

I have no idea if these reading are any good but my dca55 shows no shorts
numbers of each q203,q207,q206 readings were fluctuating I just picked the number it stayed on the longest.
maybe I need a better multimeter .

[selldoor]

Re: Resistor question

you need to say if the results are ohms kohms, volts or what
also can you read the part numbers (numbers off the parts, not the board numbers

[1supertech]

Re: Resistor question

Post 64 is all in ohms

Q203 PU401 OR BE6A11

Q207 D1805

Q205 D1805

[selldoor]

Re: Resistor question

The 3 resistors MAY be ok but you may have your zero s mixed up.
They have on them 334 so should be 330kohms not 3.3kohms??
I suppose you had better check them again but at least they are not open.

I have been trying to get my head round something for a while - In your first post you say this monitor is an Acer 1906 and I have been looking at threads on that monitor to try and help us. Many things did not make sense and I am now wondering if your set it really an acer 1916 as there are very few hits showing this power supply with a 1906.

I still think the 3 Qs are bad (less than 30ohms) If one of them is a double diode can you test it as a diode. ( Reversing the leads and advising the result
in both directions)

[Davi.p]

Re: Resistor question

the 3 resistors are marked "332", the 3 Q are transistor for sure because them are on the inverter area, i'm not usual testing them in ohm so i don't know if them are good..

[1supertech]

Re: Resistor question

SELLDOOR, and everyone thank you very much for trying to help me with this but I learned allot from you but I going to give up on this board. I buy non working monitors from recyclers maybe I will run into a Acer1906 with a cracked screen.
Thanks

[selldoor]

Re: Resistor question

Ok - Sorry we couldnt fix it - better luck with the next one.

[budm]

Re: Resistor question

"Q206
B&C 0.L
C&E 26.32
E&B 26.55

Q207
B&C 0.L
C&E 25.31
E&B 25.92

Q203
G&D 0.L
D&S 11.82
S&G 0L"
"Post 64 is all in ohms

Q203 PU401 OR BE6A11

Q207 D1805

Q205 D1805"

That means they are bad.

[Davi.p]

Re: Resistor question

You will never grow up if you give up at theese very basic steps, the next step is very easy, remove those 3 q , power up and see if led remains on.

[budm]

Re: Resistor question

We are getting close to the source of the problem based on the resistance readings of those transistors.