It appears to be 18 ohms (brown, grey, black) or a 1R8 precision resistor (brown, grey, black, gold) 10% ?? What does it measure with a meter?
The colour bands don't seem to make sense to me, so I may not have seen this coding before. If the schematic where this resistor is was available, that would give a good clue.
-Chris
The colour bands don't seem to make sense to me, so I may not have seen this coding before. If the schematic where this resistor is was available, that would give a good clue.
-Chris
strikes me as kind of strange how the service manual dont tell you the value or wattage?
yet it does for the rest of the components? only a part number,
will a 1 watt 18 ohm be ok? as im not sure on the wattage of this resistor.
this one here http://www.dalbani.co.uk/catalogue/product_details.php?id=21777
yet it does for the rest of the components? only a part number,
will a 1 watt 18 ohm be ok? as im not sure on the wattage of this resistor.
this one here http://www.dalbani.co.uk/catalogue/product_details.php?id=21777
Hi mrlennon,
Just a complete guess. It appears to be a 1/4 or 1/2 W resistor, I can't tell by the number and I'm going from the picture. So a 1W might be just fine. There is usually a guide that says all resistors are X watts unless marked otherwise. Sometimes in the parts list somewhere there is an explaination on how their part numbers work.
Give it a shot.
-Chris
Just a complete guess. It appears to be a 1/4 or 1/2 W resistor, I can't tell by the number and I'm going from the picture. So a 1W might be just fine. There is usually a guide that says all resistors are X watts unless marked otherwise. Sometimes in the parts list somewhere there is an explaination on how their part numbers work.
Give it a shot.
-Chris
ok thanks mate,
i unsure as well if its a 1/4 or 1/2 W resistor?
i have emailed karmon about the part number and hopefully will get a reply fingers crossed,
i also heard this model is a rebadged avr 4550 is if anyone has the service manual laying around maybe they could check for me,
i still have not had the rest of the parts come i ordered as of today, still waiting for them to arrive, so i can make a start, but they will hopefully be here any day now and i just got to find the wattage of this 18 ohm resistor as previously described.
i did have a quick look around for the avr 4550 but cant find a schematic to find out the value.
i unsure as well if its a 1/4 or 1/2 W resistor?
i have emailed karmon about the part number and hopefully will get a reply fingers crossed,
i also heard this model is a rebadged avr 4550 is if anyone has the service manual laying around maybe they could check for me,
i still have not had the rest of the parts come i ordered as of today, still waiting for them to arrive, so i can make a start, but they will hopefully be here any day now and i just got to find the wattage of this 18 ohm resistor as previously described.
i did have a quick look around for the avr 4550 but cant find a schematic to find out the value.
Ok just a update, i had a search through my older service manuals and it seems the 330 has same layout so i can confirm it is a Carbon 18 OHM 1/4W resistor.
now im trying to find a source for this resistor, had a quick look on Maplins
can seem to see one i could use, maybe someone woul be kind enough to have a look through and see if they can find one suitable.
thanks.
now im trying to find a source for this resistor, had a quick look on Maplins
can seem to see one i could use, maybe someone woul be kind enough to have a look through and see if they can find one suitable.
thanks.
ok just a update,
my parts arrived today at last.
will start fitting them today.
just a quick question i have never tryed a light bulb in series before so has anyone got a picture to show me how you rig a light bulb up in series?
also i have the bias picture for this amp, could someone also tell me how i go about adjusting with a dmm acording to the schematic? again never done it before but i know a bit about voltages so im not going to go sky high lol,
just need some pointers and advice.
heres the pic to the bias adjustment.
my parts arrived today at last.
will start fitting them today.
just a quick question i have never tryed a light bulb in series before so has anyone got a picture to show me how you rig a light bulb up in series?
also i have the bias picture for this amp, could someone also tell me how i go about adjusting with a dmm acording to the schematic? again never done it before but i know a bit about voltages so im not going to go sky high lol,
just need some pointers and advice.
heres the pic to the bias adjustment.
Hi mrlennon,
This one seems to run a little warm.
First, rig up an AC outlet and plug where the light bulb is wired in series with the outlet. Do this carefully and insulate everything. You are 230VAC and that is deadly. Plug this assembly into the wall, make sure the receiver is off and plug it in, you can reverse this procedure if it's easier (wall plug last).
Turn the set on while watching the lamp brightness, and for smoke from the receiver. The lamp should light brightly and dim down, try a 60W first. If the lamp stays close to normally bright, you have something wrong, turn it off. If not, change to a 120W lamp and try again. Watch the amplifier board for smoke. If the lamp is dim, measure the bias points and report. Turn off.
-Chris
This one seems to run a little warm.
First, rig up an AC outlet and plug where the light bulb is wired in series with the outlet. Do this carefully and insulate everything. You are 230VAC and that is deadly. Plug this assembly into the wall, make sure the receiver is off and plug it in, you can reverse this procedure if it's easier (wall plug last).
Turn the set on while watching the lamp brightness, and for smoke from the receiver. The lamp should light brightly and dim down, try a 60W first. If the lamp stays close to normally bright, you have something wrong, turn it off. If not, change to a 120W lamp and try again. Watch the amplifier board for smoke. If the lamp is dim, measure the bias points and report. Turn off.
-Chris
ok thanks,
im starting to replace the components tonight.
quick question, i did a test on this light bulb method on my tv,
what happens is the light bulb lights up dim for 2 secs when tv is switched on then goes off then it flashes 3 times and repeats at the same time i can hear a clicking at the back of tv, also the tv does not power up, however cocidering ur limiting the voltage supply i would guess this it wouldent power on ?
i may be wrong? is this normal?
im starting to replace the components tonight.
quick question, i did a test on this light bulb method on my tv,
what happens is the light bulb lights up dim for 2 secs when tv is switched on then goes off then it flashes 3 times and repeats at the same time i can hear a clicking at the back of tv, also the tv does not power up, however cocidering ur limiting the voltage supply i would guess this it wouldent power on ?
i may be wrong? is this normal?
ok just a update,
i finished putting the amp back together,
i put light bulb in series with a 120w bulb,
when i switch the amplifier on, its glows very dim for about 4 seconds then after about 4 seconds the bulb goes bright for 1 second, then the ampifier goes back into standby?
is this normal?
thanks
i finished putting the amp back together,
i put light bulb in series with a 120w bulb,
when i switch the amplifier on, its glows very dim for about 4 seconds then after about 4 seconds the bulb goes bright for 1 second, then the ampifier goes back into standby?
is this normal?
thanks
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