graantjes

sold! thanks to all

Thanks strophlex I live in Germany now and I am currently talking to skunks to sell the unit. best regards, Joeri

I am selling this allmost completely build MB6582 with all parts included. I stopped this project because I had 2 bad power supplys and didnt have the time to look for a decent old one when I needed it. I have had the board sent to strophlex and he confirmed it was working with his power supply. I am looking for 450 euro, shipping can be to anywhere, payment trough bank transfer or paypall best regards, Joeri

the bottom ones measure 9vac but only the left one of the middle pads measures 5v, is this ok? next I measure the switch or? thanks, best regards, Joeri

ok, so looking at MB-6582_Base_PCB_Mono.pdf we have 7 contact points on the back of the power connector J1 The bottom ones are 9v? and the middle one on the left is 5 v? What are the other ones? best regards, Joeri

So how do the pins underneath the test pads measure out with you guys? If I can confirm that this psu works, I can exclude this from being the problem. Orange hand: So in case of the psu with 5v on pin 5, is it normal to not measure it on the test pad? thanks!

Well, sadly enough that pin 4 on my psu measures nothing, it is pin 5 on the other side of pin 2 that measures 5v (I am orienting my connecter the same way as you with the opening on top) There seems to be many different c64 power supply` s in rotation. thanks, best regards, Joeri

The pin labeled 5 on the picture above mates with pin 5 here: http://www.allpinouts.org/index.php/Commodore_C64_Power_Supply Following that same pinout, pin 4 is not assigned on my power supply. So if pin 4 on the above picture I posted mates with the 5v trace, I can change the cables inside the wire to give 5v to pin 4?

-PSU is still ok -no continuity between inner pads -continuity between pin 2 and gnd -no continuity between pin 5 and 5v (continuity between pin 4 and 5v)

female power connector on the board best regards, Joeri

ok, that explains a lot. Now the power supply measures ok. So doing this one step at a time, I looked at the base pcb pdf and turned the board around with the psu connected and the switch off. the outer lugs measure 9vac but when I measure the inner lugs (red probe on 5v, black probe on gnd) it measure nothing. thanks for the patience :) It` s really appreciated. best regards, Joeri

5 and 2 are ok, But when I measure ground (1 or 3) against 6 or 7 I get strange readings (and I do know how to set the multimeter to AC) thanks

Today I measured the psu again and found that according to http://www.allpinouts.org/index.php/Commodore_C64_Power_Supply (looking at the picture as a MALE connector) I get 5vdc between pins 2 and 5 and only there but the 9vac confuses me, I get 9vac between pins 2 and 7, and 5vac (sometimes 12 or 2) between pins 1 and 6 or 3 and 7 Is this correct? thanks

ok, So I got a ``new`` power supply in the mail today and the 7 pins measure out fine, what` s the next thing to do considering the 2 almost broken pads and the bridge that is gone. I don` t want to brake something so I am taking it slow this time. best regards, Joeri

I also measured the psu pins and I have a correct 5VDC pin and a 9VAC pin I know,that was before, who knows how I broke the psu? I have a new c64 psu on the way. I also took it apart and it seems it doesn` t have an internal fuse, so something must be broken. I will get there eventually :) technobreath: the psu was fine before, it seems to be broken now... the beginning and end checks I understand, it` s when it comes to understanding the circuit itself and looking for errors there when I need some help. Thanks everybody, I will post next resulst when my new psu is in. best regards, Joeri

Hi Strophlex, The fuse is still ok, I replaced it with a new one and it gave me the same results. The power connections on the back don` t give me the needed voltages though. I guess I will be searching for another power supply. Thanks, best regards, Joeri

With the outside fuse I mean the one you can see a little in the bottom-left corner of the psu in the picture. It is a cylindrical hole with a fuse inside next to the power chord. With the square connector I mean the square pad on the bottom of the psu connection which should measure 9vac according to the base pcb diagram. I will replace the inside fuse tomorrow and let you know. thanks! best regards, Joeri

I think you may be right, I only concentrated on the fuse of the psu on the outside, which is fine but there is one in the inside as well? I used to have 9vac at both pins on the connector at the backside, now I only have 9vac at the round connection and not at the square one. 5vdc is absent. thanks again for the patience, best regards, Joeri

I am sorry, I meant voltage. So I only measure with the switch off? or both? best regards, Joeri

With the PSU connected and the powerswitch off, I measure no DC current between the power connector pins. I follow your reasoning but I really don` t want to break anything. Thanks. best regards, Joeri

With the powerswitch off it didn` t beep, with the powerswitch on it beeped a little while but stopped beeping. best regards, Joeri

that` s correct,except that I did get a beep on the backside sometimes between J73:pin2 and J3:GND, but the contact on the backside (from J73:pin2) is loose from trying to desolder the bridge, so now it doesn` t beep anymore... hope this helps :) best regards, Joeri

That` s correct Strophlex, I get a beep between pin 1 and 2 of the switch. I still don` t have 5v beyond the psu input pins on the bottom though.... (as demonstrated by the dots on your picture) best regards, Joeri

Without the power on, none of them beep. I am sorry to inform you that I have been checking the continuity with the power on, a friend told me it was done that way but I guess he was wrong... On the bright side: I will never forget this again :) best regards, Joeri

Hi Strophlex, thanks again for taking the time to help me out, With the power on, only the connection between pins 1 and 2 of the switch beep. All other continuity checks fail. best regards, Joeri