Recent content by marcelv

C4 is NOT connected to ground, but to C72 end L10

R309 , Brown Black gold gold , 1 ohm ? First band not clear, maybe grey. Just recapped one of these psu's, R309 on this psu is also not readable, measures around 1 ohm Some pics found on the nternet

Guess there are 2 options: (From tinkerdifferent) "The purple board is now Revision 1.3, and the C15 has holes for film capacitor. *Also has holes for electrolytic capacitor"

the schematic is for the 820-0395-A (early classic) so the flyback is compatible with the SE

is the flyback from a classic ? according to the bomarc schematic MC-FBM-008

********************************************************************** J U M P E R S ********************************************************************** CONNER CP3040 PRODUCT MANUAL 00501-016 Jumper setting -------------- J2 SCSI Connector Pin...

looks like someone replaced the flyback with a different type which does not need the connection which has been removed

I have a classic with even more damage from the leaking battery. Removed RTC and sound chip, D1, D2, Y1, C1, C2 to clean beneath and repair a lot of tracks. Tested the board before replacing these components.

You can remove the RTC chip, the classic will start without the chip present (if no other problems exist on the board)

probably combination analog board I still see capacitor fluid residu from the old capacitors, please clean that you can use pp1 to adjust the 5v/12v voltage , take care, high voltages around!!! adjust the 5V a bit higher, but also measure 12V so that it is not too high logic board probably...

did you try resetting the PRAM? Reset PRAM (hold down command-option-P-R while pressing the power button, continue holding these keys down until the computer chimes at least 3 times, then release). could you try booting without the battery present

You could check the diodes on the back of the analog board, had a problem once with dp5 or dp8 (iirc ) which caused simliar problem

checklist I used for the audio repair on the classic II rev A board C3 47uF 16V - gnd + R2, R7, R15 C4 47uF 16V - phones switch + pin 5 U1 C5 10uF 16V - gnd + pin 8 U2 (78L08), R21 C6 10uF 16V - gnd + R6 (4k7 to R15) C7 10uF 16V - gnd + pin 7 U11 , R33 C8 10uF 16V - gnd + pin 3 U1 C9...

Can someone confirm the bomarc schematic for the classic II is wrong regarding pin 1 and 2 of the DFAC? wrong version (pin 1 connected to pin 2 and swapped) corrected version Second question where does the via next to C11 go