powerbook 1400 charger..

[leosadvs]

hi!.. im waiting my "new" powerbook 1400 what i get free.. but it not have the Charger.. and i dont know if i can get the charger in my city.. so.. anyone knows if i can buy some of the generics chargers to make it work? or its have a special charger connector?

and what are the V. and the A to make it works?

Thanks! :beige:

 

[russman]

I believe its 45 watts 9 volts but i am not completely sure, i know a charger from a lombard will work and i think a charger from a pismo will as well.

 

[equill]

The 'correct' charger is a Macintosh PowerBook 45W Power Adapter, M4896 (1996), 100-240VAC 1.2A in and 24VDC 1.87A out. The M3037 (1995) for a PB 5300 looks similar, and has a similar input/output, but has an unsuitable plug for a 1400.

There is also an M4328 (1997) adapter for the 2400c with identical input/output and a suitable plug to fit the PB 1400. You may be lucky enough to find an Asian eBay seller (local338) who can supply a new version of the M4328 for about USD5.00 (plus USD14.00 postage), but it is nearly three years since I got one from him.

de

 

[Bunsen]

The chargers from the Powerbook Duo series will work also. They won't give you enough charge to both run the laptop and charge a flat battery at the same time, but you can do one or the other.

If you can't find a Powerbook charger, you can use a stereo 6.5mm jack plug - ie a large size headphone plug, also known as TRS (Tip Ring and Sleeve). You need to put a small rubber ring (also known as a "grommet" or "cable grommet") around the base of the jack so that the divisions in the plug line up properly with the connectors inside the Powerbook. And it must be a stereo plug, not mono. I don't know the correct pinout for power, sorry.

Note I haven't tried the above, it's what I've read on Applefritter and other places.

It is definitely 24 volts you want, not 9 volts. As for the amps, anything above 1.5A (1500mA) should do it. The Powerbook will only draw as many amps as it needs, so a higher amp rating is OK. Make sure it is a regulated 24 volts though.

 

[russman]

Yeah 24 volt is right, just said 9 off the top of my head. I know a charger from a lombard will work though.

 

[leosadvs]

Thanks! great info.. i have the charger of my old stolen laptop. it is 24V, I must try the thing about using a 6.5mm plug

 

[wally]

There is a somewhat obscure note on PowerBook power adapter sense circuits at

http://developer.apple.com/qa/qa2001/qa1266.html which specifies clearly where the +24V and Gnd connect to the augmented sense shell equiped stereo plug. For the 45W Yo-Yo supply, the ground shield of the coax is gnd, inner wire is +24. Note that the coax cable ground shield does not connect to that outer sense shell of the plug. I measure approximately 410K ohms between that sense shell and coax ground shield on the temporarily disconnected plug of a 45W M7332 Yo-Yo supply I am repairing tonight, probably a small 412K ohm programming resistor potted within the plug.

 

[Bunsen]

Note that refers to the Powerbook G4 15" and 17", which I believe take the newer, smaller (but similarly shaped) power connector. So it may not be relevant to a 1400.

By "outer sense shell" do you mean the metal ring around the connector? The OP's first language is not English (no offence intended leosadvs, your written English is very good). Mine is, and I had trouble parsing your post.

 

[wally]

Note that refers to the Powerbook G4 15" and 17", which I believe take the newer, smaller (but similarly shaped) power connector. So it may not be relevant to a 1400.
By "outer sense shell" do you mean the metal ring around the connector? The OP's first language is not English (no offence intended leosadvs, your written English is very good). Mine is, and I had trouble parsing your post.

The M7332 model number comes with two variants, the larger plug that fits both the PB1400 and others including the Pismo, and another variant with the smaller plug that fits newer models. The larger plug version is compatible with the PB1400, and I verified it is connected per the drawings by measurement. I refer to that document because it happens to have a drawing that correctly identifies ground and +24V connections, the tip being a no connection and the shell (as designated in the drawings and connected to a net called Adapter Sense) as a means to sense power adapter types, If I knew of a document for the PB1400 I would have used it. See figures 3, 4, 5 for what I mean by shell.

 

[Bunsen]

Got it, thanks.

I wonder though, whether the 1400 even has the Adapter Sense circuits mentioned.

 

[wally]

...I wonder though, whether the 1400 even has the Adapter Sense circuits mentioned.

Excellent question. As I write this I have a PB1400 running and charging powered from 24V with that shell just floating, no connection, as an experiment. To avoid an unfortunate incident extreme care is advised making and verifying the connections. I am using a standard stereo Y cable that has no shell contact and is inserted so its shoulder does not touch the PB1400 shell sensing metal. Kind of looks like there is no sense circuit. But I cannot be sure if it has some kind of sense circuit and power manager programming to stop charging in the airline adapter powered configuration for some worse case running load situation, say with a maxed out PB1400 with accelerated CPU and disk and CDROM going simultaneously. I suspect just carefully hooking up a regulated 24VDC source will work fine but cannot guarantee it. Should future experimenters see a failure to charge while running, I conjecture that just adding a single 412k ohm resistor sense shell to gnd would make their jury rigged supply more equivalent to the Yo-Yo design. Also, it may be that the more commonly available value 390K would work also.