Give me a single panel Surfmaster PI (White's) / PCB

[silver]

probably this schematic

can you post picture of board around 78l05, and picture of bottom of board ?

Hi silverdog and thanks

[silverdog]

Have you a new 7660 yet ?

Lt1054 is a possible replacement

[silver]

Hi silverdog
i have not a new 7660 yet so i will try to find lt1054, many thanks
silverdog, can you see any problem in my board? if you see please let me know.
regards

[silver]

i am using 1n4007 instead 1n4001.

[bernte_one]

hello
christi

use mpsa13 instead of bc
then the partprinting ist ok if u use bc look for correct pinout mybe you have to turn it 180 degree

[silverdog]

surf pi board

Hi silverdog
i have not a new 7660 yet so i will try to find lt1054, many thanks
silverdog, can you see any problem in my board? if you see please let me know.
regards

not easy to see, funny looking C7 ?
If you have 5v at 7660 pin8 then ok upto that point
If 7660 ok, then gnd on pin3 ok ? C7, C14,C15 ok ?

where are you maybe someone near can help ?

[silver]

not easy to see, funny looking C7 ?
If you have 5v at 7660 pin8 then ok upto that point
If 7660 ok, then gnd on pin3 ok ? C7, C14,C15 ok ?

where are you maybe someone near can help ?

Hi silverdog
thanks but how i can know that gnd on pin3 is ok?!
C14,C15 are 220uf 25v and C7 is 470nf - C17 is two 120pf in parallel that gave me about 240pf, yes it is a few funny but i cant find 220pf !!!
thanks so many
silver

[bernte_one]

look here maybe you find a c with 0,22nf
http://www.convertworld.com/de/elektrische-kapazitat/

[silverdog]

Silver

you can test gnd on pin 3 using your voltmeter in continuity setting

http://www.firehow.com/200912125665/...a-circuit.html

one lead on any gnd part of pcb, maybe battery negative, the other onto pin3, you should get a sound or display will show zero

You should use your schematic and test each connection

[silver]

Hi
thanks for help dear bernte one
thank silverdog, yes pin3 is connected to gnd.
i trsted it several time but ok i will test each connection again.
many thanks

[bklein]

If you end up placing a parts order you might think of just replacing all the ceramic caps with mylar film ones. Much more stable over temperature and preferred. Where are you located that you can't order parts easily?
I thought from earlier posts that the 7660 was working as you had like 11V in and -9V out back then (thought 5V regulator was bad).
Try Digikey for parts.

[silver]

Hi bklein and thanks
i am from iran and we are in new year holidays so shops is closed yet!! i was ordered 7660 but it will arrive after about one week when holidays finish!.
yes i must chenge the ceramic cap's with mylar film ones, thanks.
my 7660 is broken, because pin8 is +5v and pin 5 is +0.7v now( i did changed broken 78L05).
when 7660 arrive, i will post the result.
many thanks for your helps
silver

[bklein]

You might want to check out www.taydaelectronics.com for some of your parts.
They have good prices and I get my stuff packed well and delivered in a week.
I just got a big collection of mylar caps I hope to use for my metal detector projects.

Barry

[silver]

Hi barry thanks
but my country is in boycott of western country!!!!!!!!!! any way thanks a lot for your help.
best regards
silver

[bklein]

So Digikey is out but Tayda is in Thailand.
My shipments come from the US though so I don't know how it would work for you.
Ebay has a ton of sources from HongKong etc. though.
What are your ordering restrictions?
Another thing, looking through forum entries regarding your board there was a problem with suggested orientation of a transistor - I think it was Q6. Did you get that right?