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Mike De Petris
Guest
Fri Aug 13, 2010 11:56 am
My laptop freezes when I connect the power cord, works well on battery
only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51 CA+MIC
MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 T5300
5648B999 SL9WE
1.73/2M/533
INTEL... copyright 06
Ken
Guest
Fri Aug 13, 2010 12:43 pm
Mike De Petris wrote:
Quote:
My laptop freezes when I connect the power cord, works well on battery
only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51 CA+MIC
MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 T5300
5648B999 SL9WE
1.73/2M/533
INTEL... copyright 06
I don't know about acquiring a schematic for trouble shooting the MB,
but the first thing I would do is test the power adapter with a load
attached. I have repaired several that output the correct voltage but
failed to regulate when loaded down.
Also, some Toshiba Satellite computers were notorious for having power
connector problems. I trust this computer does NOT have such a problem?
Mike De Petris
Guest
Fri Aug 13, 2010 2:55 pm
On Aug 13, 1:43 pm, Ken <K...@invalid.com> wrote:
Quote:
Mike De Petris wrote:
My laptop freezes when I connect the power cord, works well on battery
only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51 CA+MIC
MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 T5300
5648B999 SL9WE
1.73/2M/533
INTEL... copyright 06
I don't know about acquiring a schematic for trouble shooting the MB,
but the first thing I would do is test the power adapter with a load
attached. I have repaired several that output the correct voltage but
failed to regulate when loaded down.
Also, some Toshiba Satellite computers were notorious for having power
connector problems. I trust this computer does NOT have such a problem?
no problems on the connector
tried different power supplies, even stabilized laboratory psu
Meat Plow
Guest
Fri Aug 13, 2010 5:23 pm
On Fri, 13 Aug 2010 04:55:24 -0700, Mike De Petris wrote:
Quote:
On Aug 13, 1:43Â pm, Ken <K...@invalid.com> wrote:
Mike De Petris wrote:
My laptop freezes when I connect the power cord, works well on
battery only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51 CA+MIC
MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 Â Â T5300
5648B999 Â SL9WE
1.73/2M/533
INTEL... copyright 06
    I don't know about acquiring a schematic for trouble
    shooting the MB,
but the first thing I would do is test the power adapter with a load
attached. Â I have repaired several that output the correct voltage but
failed to regulate when loaded down.
    Also, some Toshiba Satellite computers were notorious for
    having power
connector problems. Â I trust this computer does NOT have such a
problem?
no problems on the connector
tried different power supplies, even stabilized laboratory psu
Did you try cleaning the air ducts? When on batter the CPU 'may' be at a
reduced clock speed via Toshiba Power Management when on battery. When on
the PSU, the CPU will go to full speed and may just be over heating.
Food for thought --
--
Live Fast, Die Young and Leave a Pretty Corpse
Mike De Petris
Guest
Fri Aug 13, 2010 7:25 pm
On Aug 13, 4:23 pm, Meat Plow <mhyw...@yahoo.com> wrote:
Quote:
On Fri, 13 Aug 2010 04:55:24 -0700, Mike De Petris wrote:
On Aug 13, 1:43 pm, Ken <K...@invalid.com> wrote:
Mike De Petris wrote:
My laptop freezes when I connect the power cord, works well on
battery only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51 CA+MIC
MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 T5300
5648B999 SL9WE
1.73/2M/533
INTEL... copyright 06
I don't know about acquiring a schematic for trouble
shooting the MB,
but the first thing I would do is test the power adapter with a load
attached. I have repaired several that output the correct voltage but
failed to regulate when loaded down.
Also, some Toshiba Satellite computers were notorious for
having power
connector problems. I trust this computer does NOT have such a
problem?
no problems on the connector
tried different power supplies, even stabilized laboratory psu
Did you try cleaning the air ducts? When on batter the CPU 'may' be at a
reduced clock speed via Toshiba Power Management when on battery. When on
the PSU, the CPU will go to full speed and may just be over heating.
Food for thought --
thank you, anyway please consider the laptop is completely teared a
part, non problems of air flow, and when connectinh power it locks
immediately even if in the BIOS pages
Meat Plow
Guest
Fri Aug 13, 2010 7:41 pm
On Fri, 13 Aug 2010 09:25:13 -0700, Mike De Petris wrote:
Quote:
On Aug 13, 4:23Â pm, Meat Plow <mhyw...@yahoo.com> wrote:
On Fri, 13 Aug 2010 04:55:24 -0700, Mike De Petris wrote:
On Aug 13, 1:43Â pm, Ken <K...@invalid.com> wrote:
Mike De Petris wrote:
My laptop freezes when I connect the power cord, works well on
battery only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51
CA+MIC MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 Â Â T5300
5648B999 Â SL9WE
1.73/2M/533
INTEL... copyright 06
    I don't know about acquiring a schematic for trouble
    shooting the MB,
but the first thing I would do is test the power adapter with a load
attached. Â I have repaired several that output the correct voltage
but failed to regulate when loaded down.
    Also, some Toshiba Satellite computers were notorious
    for having power
connector problems. Â I trust this computer does NOT have such a
problem?
no problems on the connector
tried different power supplies, even stabilized laboratory psu
Did you try cleaning the air ducts? When on batter the CPU 'may' be at
a reduced clock speed via Toshiba Power Management when on battery.
When on the PSU, the CPU will go to full speed and may just be over
heating.
Food for thought --
thank you, anyway please consider the laptop is completely teared a
part, non problems of air flow, and when connectinh power it locks
immediately even if in the BIOS pages
Had no way of knowing since you didn't mention these additional facts in
your original post.
--
Live Fast, Die Young and Leave a Pretty Corpse
Mike De Petris
Guest
Fri Aug 13, 2010 8:14 pm
On Aug 13, 6:41 pm, Meat Plow <mhyw...@yahoo.com> wrote:
Quote:
On Fri, 13 Aug 2010 09:25:13 -0700, Mike De Petris wrote:
On Aug 13, 4:23 pm, Meat Plow <mhyw...@yahoo.com> wrote:
On Fri, 13 Aug 2010 04:55:24 -0700, Mike De Petris wrote:
On Aug 13, 1:43 pm, Ken <K...@invalid.com> wrote:
Mike De Petris wrote:
My laptop freezes when I connect the power cord, works well on
battery only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51
CA+MIC MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 T5300
5648B999 SL9WE
1.73/2M/533
INTEL... copyright 06
I don't know about acquiring a schematic for trouble
shooting the MB,
but the first thing I would do is test the power adapter with a load
attached. I have repaired several that output the correct voltage
but failed to regulate when loaded down.
Also, some Toshiba Satellite computers were notorious
for having power
connector problems. I trust this computer does NOT have such a
problem?
no problems on the connector
tried different power supplies, even stabilized laboratory psu
Did you try cleaning the air ducts? When on batter the CPU 'may' be at
a reduced clock speed via Toshiba Power Management when on battery.
When on the PSU, the CPU will go to full speed and may just be over
heating.
Food for thought --
thank you, anyway please consider the laptop is completely teared a
part, non problems of air flow, and when connectinh power it locks
immediately even if in the BIOS pages
Had no way of knowing since you didn't mention these additional facts in
your original post.
I'm sorry, I'm just forgetting pieces as I wrote this long story many
time in different newsgroups and forums, and still need to find a
solution.
Anyway I can still use the laptop on battery, or giving 12V with an
ATX PSU in place of the positive battery pole, leaving other battery
contacts in place.
Ken
Guest
Fri Aug 13, 2010 8:54 pm
Mike De Petris wrote:
Quote:
On Aug 13, 6:41 pm, Meat Plow<mhyw...@yahoo.com> wrote:
On Fri, 13 Aug 2010 09:25:13 -0700, Mike De Petris wrote:
On Aug 13, 4:23 pm, Meat Plow<mhyw...@yahoo.com> wrote:
On Fri, 13 Aug 2010 04:55:24 -0700, Mike De Petris wrote:
On Aug 13, 1:43 pm, Ken<K...@invalid.com> wrote:
Mike De Petris wrote:
My laptop freezes when I connect the power cord, works well on
battery only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51
CA+MIC MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 T5300
5648B999 SL9WE
1.73/2M/533
INTEL... copyright 06
I don't know about acquiring a schematic for trouble
shooting the MB,
but the first thing I would do is test the power adapter with a load
attached. I have repaired several that output the correct voltage
but failed to regulate when loaded down.
Also, some Toshiba Satellite computers were notorious
for having power
connector problems. I trust this computer does NOT have such a
problem?
no problems on the connector
tried different power supplies, even stabilized laboratory psu
Did you try cleaning the air ducts? When on batter the CPU 'may' be at
a reduced clock speed via Toshiba Power Management when on battery.
When on the PSU, the CPU will go to full speed and may just be over
heating.
Food for thought --
thank you, anyway please consider the laptop is completely teared a
part, non problems of air flow, and when connectinh power it locks
immediately even if in the BIOS pages
Had no way of knowing since you didn't mention these additional facts in
your original post.
I'm sorry, I'm just forgetting pieces as I wrote this long story many
time in different newsgroups and forums, and still need to find a
solution.
Anyway I can still use the laptop on battery, or giving 12V with an
ATX PSU in place of the positive battery pole, leaving other battery
contacts in place.
Have you looked at the MB power bus (+5v I would assume) for ripple
when you attach the external power supply?
Meat Plow
Guest
Fri Aug 13, 2010 10:13 pm
On Fri, 13 Aug 2010 10:14:22 -0700, Mike De Petris wrote:
Quote:
On Aug 13, 6:41Â pm, Meat Plow <mhyw...@yahoo.com> wrote:
On Fri, 13 Aug 2010 09:25:13 -0700, Mike De Petris wrote:
On Aug 13, 4:23Â pm, Meat Plow <mhyw...@yahoo.com> wrote:
On Fri, 13 Aug 2010 04:55:24 -0700, Mike De Petris wrote:
On Aug 13, 1:43Â pm, Ken <K...@invalid.com> wrote:
Mike De Petris wrote:
My laptop freezes when I connect the power cord, works well on
battery only.
I want to check the motherbard in search for the faulty
component, where could I find pinouts and voltages to check
for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51
CA+MIC MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 Â Â T5300
5648B999 Â SL9WE
1.73/2M/533
INTEL... copyright 06
    I don't know about acquiring a schematic for trouble
    shooting the MB,
but the first thing I would do is test the power adapter with a
load attached. Â I have repaired several that output the correct
voltage but failed to regulate when loaded down.
    Also, some Toshiba Satellite computers were notorious
    for having power
connector problems. Â I trust this computer does NOT have such a
problem?
no problems on the connector
tried different power supplies, even stabilized laboratory psu
Did you try cleaning the air ducts? When on batter the CPU 'may' be
at a reduced clock speed via Toshiba Power Management when on
battery. When on the PSU, the CPU will go to full speed and may just
be over heating.
Food for thought --
thank you, anyway please consider the laptop is completely teared a
part, non problems of air flow, and when connectinh power it locks
immediately even if in the BIOS pages
Had no way of knowing since you didn't mention these additional facts
in your original post.
I'm sorry, I'm just forgetting pieces as I wrote this long story many
time in different newsgroups and forums, and still need to find a
solution.
Anyway I can still use the laptop on battery, or giving 12V with an ATX
PSU in place of the positive battery pole, leaving other battery
contacts in place.
Usually those things run off a 19 volt 95 watt PSU.
--
Live Fast, Die Young and Leave a Pretty Corpse
Ken
Guest
Fri Aug 13, 2010 10:25 pm
Mike De Petris wrote:
Quote:
On Aug 13, 9:54 pm, Ken<K...@invalid.com> wrote:
Have you looked at the MB power bus (+5v I would assume) for ripple
when you attach the external power supply?
this is what I am asking for, I tought I should measure it at the
socket pin holes, how can I idetify the +5V line on the motherboard?
My guess is the hard drive is operating on +5v. You could measure it
there.
Quote:
And how would you measure (and fix the cause) a ripple on the bus? I
have a couple of scopes and multimeters for that, but how?
First determine if it has ripple. You can normally take a volt meter
set for AC and measure the ripple on a DC bus. Old VOM's used a cap to
isolate the AC from the DC component, but the new DVM's generally work
for this. If you did find ripple, look for a cap that is bad or
possibly a diode that is shorted. First determine if it exists.
Mike De Petris
Guest
Fri Aug 13, 2010 11:03 pm
On Aug 13, 9:54 pm, Ken <K...@invalid.com> wrote:
Quote:
Have you looked at the MB power bus (+5v I would assume) for ripple
when you attach the external power supply?
this is what I am asking for, I tought I should measure it at the
socket pin holes, how can I idetify the +5V line on the motherboard?
And how would you measure (and fix the cause) a ripple on the bus? I
have a couple of scopes and multimeters for that, but how?
Mike De Petris
Guest
Fri Aug 13, 2010 11:05 pm
On Aug 13, 9:13 pm, Meat Plow <mhyw...@yahoo.com> wrote:
Quote:
Anyway I can still use the laptop on battery, or giving 12V with an ATX
PSU in place of the positive battery pole, leaving other battery
contacts in place.
Usually those things run off a 19 volt 95 watt PSU.
yes of course, but this motherboard does not like it any more, 12V
from the battery (or external, faking the battery connector) is still
ok instead
whit3rd
Guest
Fri Aug 13, 2010 11:19 pm
On Aug 13, 9:25 am, Mike De Petris <mikedepet...@gmail.com> wrote:
Quote:
... the laptop is completely teared a
part, non problems of air flow, and when connectinh power it locks
immediately even if in the BIOS pages
There's a second CPU (a little tiny one) that handles the power
sequencing. The 'BIOS pages' are only for the big CPU, it's that
little battery-monitor one that runs into some kind of trouble, and
it has that problem every time the external power is applied and
it tries to do the natural thing, run the computer from external
power and charge the battery. Somehow it senses overvoltage
or overcurrent and shuts down.
Look for small-value current sense resistors that are open, or
for semiconductor switches that are shorted (can't turn off).
There are often PMOS power switch transistors involved.
Also, look for fuses (they might not LOOK like fuses, though).
Battery charge current might be channeled through a switchmode
regulator, those have always had problems if a capacitor fails.
larry moe 'n curly
Guest
Sat Aug 14, 2010 2:30 am
A schematic of the Toshiba A205 series can be found in this forum:
www.reepair.net/en
Here's a really good website about Toshiba laptops:
www.IrisVista.com
`ZACK`
Guest
Sat Aug 14, 2010 6:36 am
"Mike De Petris" <mikedepetris_at_gmail.com> wrote in message
news:b76de8d0-9d51-41df-829f-0599838d7c0c_at_i31g2000yqm.googlegroups.com...
Quote:
My laptop freezes when I connect the power cord, works well on battery
only.
I want to check the motherbard in search for the faulty component,
where could I find pinouts and voltages to check for?
Toshiba Satellite A205-S4577 (PSAF0U-01Q009)
Laptop Motherboard: MAIN BOARD 945GM. Main Board 945GM EXC+51 CA+MIC
MDC 1310A2120812 Alternate Part Numbers: V000108030
Processor:
LF80537 T5300
5648B999 SL9WE
1.73/2M/533
INTEL... copyright 06
try here
http://www.reepair.net/en/forumdisplay.php/30-Laptop-Schematics
zack
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