SONY VRD MC5 DVDIRECT DVD BURNER RECORDER

[Wild_Bill]

I haven't found any info regarding repair of these DVDirect recorders, and
was wondering if anyone had accomplished any repairs.
http://store.sony.com/p/VRD-MC5/en/p/VRDMC5
The production date is 2007.
These Sony VRD DVDirect recorders record to DVD from sources of composite or
S-video, digital video/firewire, and memory cards.. or directly from some
models of Handycams.

The unit appears to be dead, except that the "power on" LED turns on when
the Power button is pressed (but doesn't turn off when pressed again).
No display on the LCD, no drawer extend when Eject is pressed and no other
LEDs are illuminated (there are several mounted directly to the board for
diagnostic purposes, presumably).
The circuit board is marked with some voltage test points, and the only
voltages which are present are 12V (input voltage) and 5V.

Missing are 3.3, 1.8 and 1.25V, however I'm not certain that all of these
are standby voltages.

I've only seen and checked 1 fuse (a dual 3A device) and there doesn't
appear to be any others.

Any info related to the missing voltages and functions would be very much
appreciated.

--
Cheers,
WB
..............

 

[N_Cook]

Wild_Bill <wb_wildbill@XSPAMyahoo.com> wrote in message
news:6cpss.771079$%Q3.644592@en-nntp-15.dc1.easynews.com...

I haven't found any info regarding repair of these DVDirect recorders, and
was wondering if anyone had accomplished any repairs.
http://store.sony.com/p/VRD-MC5/en/p/VRDMC5
The production date is 2007.
These Sony VRD DVDirect recorders record to DVD from sources of composite
or
S-video, digital video/firewire, and memory cards.. or directly from some
models of Handycams.

The unit appears to be dead, except that the "power on" LED turns on when
the Power button is pressed (but doesn't turn off when pressed again).
No display on the LCD, no drawer extend when Eject is pressed and no other
LEDs are illuminated (there are several mounted directly to the board for
diagnostic purposes, presumably).
The circuit board is marked with some voltage test points, and the only
voltages which are present are 12V (input voltage) and 5V.

Missing are 3.3, 1.8 and 1.25V, however I'm not certain that all of these
are standby voltages.

I've only seen and checked 1 fuse (a dual 3A device) and there doesn't
appear to be any others.

Any info related to the missing voltages and functions would be very much
appreciated.

--
Cheers,
WB
.............

are there "missing" devices outlined/labelled on the overlay?
the traces from the /some 3.3,1.8,1.25 probably go to those missing devices
if you trace them along

 

[Wild_Bill]

After spending some time checking various other marked test points to make
some notes, also checked the ESR of the aluminum electrolytic surface-mount
caps (absolutely fantastic tool.. thanks, Bob Parker).

Out of the 8 caps marked 10uF 16V, 5 of 'em had ESR readings of 9 or 10
ohms.
The larger value caps (100uf, 220uf 16V) had reasonable ESR readings.

One of the larger caps(?) is clearly marked 220C UD.. I dunno what that's
supposed to mean, but it looks identical to the other 220uF caps, including
the black semicircle for the negative terminal.
Anyone familiar with these markings?

I'll see if I can get some replacement caps, and report back with any
changes.

--
Cheers,
WB
..............


"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:6cpss.771079$%Q3.644592@en-nntp-15.dc1.easynews.com...

The unit appears to be dead> The circuit board is marked with some voltage
test points, and the only voltages which are present are 12V (input
voltage) and 5V.

Missing are 3.3, 1.8 and 1.25V, however I'm not certain that all of these
are standby voltages.

Cheers,
WB
.............

 

[Wild_Bill]

That's a possibility, but I won't be able to trace the double-sided
(populated both sides) surface mount board since the traces are fairly
complex.. passing under components and a multitude of opposite side vias.

Ya gotta admire the process of developing products like these, but they're
not very service-friendly. Some components are as small as a few grains of
common table salt.

Since you asked, unlike many modern devices, there is only 1 omitted large
IC and relatively few scattered smaller components.

--
Cheers,
WB
..............



"N_Cook" <diverse@tcp.co.uk> wrote in message
news:k8takc$aii$1@dont-email.me...

are there "missing" devices outlined/labelled on the overlay?
the traces from the /some 3.3,1.8,1.25 probably go to those missing
devices
if you trace them along

 

[Franc Zabkar]

On Sun, 25 Nov 2012 08:39:05 -0500, "Wild_Bill"
<wb_wildbill@XSPAMyahoo.com> put finger to keyboard and composed:

I haven't found any info regarding repair of these DVDirect recorders, and
was wondering if anyone had accomplished any repairs.

http://store.sony.com/p/VRD-MC5/en/p/VRDMC5

The production date is 2007.

I couldn't locate a free service manual, but FWIW I found the
following documents during my search.

Technical Bulletin - No Sound when Dubbing / Error Message Appears:
http://www.getmanual.com/gmn/sb/sony/08hv001.pdf

Technical Bulletin - Format Error / No Sound:
http://www.getmanual.com/gmn/sb/sony/08hv009.pdf

Instruction Manual:
ftp://ftp.vaio-link.com/pub/manuals/consumer/VRD-MC5.PDF

Operating Instructions Supplement:
http://portalsso.vansd.org/portal/page/portal/Staff_Portal/Staff_Pages/VSAA_STAFF_PAGES/VSAA_ALT_Jeffers/VSAA_Jeffers_SUBPAGE1/TAB1710002/TAB2501109/Sony_DVD_Recorder_Supplement.pdf

Quick Guide:
http://portalsso.vansd.org/portal/page/portal/Staff_Portal/Staff_Pages/VSAA_STAFF_PAGES/VSAA_ALT_Jeffers/VSAA_Jeffers_SUBPAGE1/TAB1710002/TAB2501109/Sony_DVD_Recorder_QUICK.pdf

These Sony VRD DVDirect recorders record to DVD from sources of composite or
S-video, digital video/firewire, and memory cards.. or directly from some
models of Handycams.

The unit appears to be dead, except that the "power on" LED turns on when
the Power button is pressed (but doesn't turn off when pressed again).
No display on the LCD, no drawer extend when Eject is pressed and no other
LEDs are illuminated (there are several mounted directly to the board for
diagnostic purposes, presumably).

The circuit board is marked with some voltage test points, and the only
voltages which are present are 12V (input voltage) and 5V.

Missing are 3.3, 1.8 and 1.25V, however I'm not certain that all of these
are standby voltages.

I'd look for 3-terminal linear regulators, something like an LD1117-33
or LD1117-18:

http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXuqtqv.pdf

Alternatively, look for switchmode step-down buck regulators. These
will be located near coils. I suspect that 3.3V and 1.8V may the Vio
supplies for the main microcontroller and for the SDRAM and flash
memory ICs. The Vcore supply may be 1.25V.

If I'm right, then it could be that the device is in fact in standby
mode, and it may require a common enable signal to turn on each of
these supplies.

I've only seen and checked 1 fuse (a dual 3A device) and there doesn't
appear to be any others.

Any info related to the missing voltages and functions would be very much
appreciated.

A photo would help a lot.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Wild_Bill]

You always seem to find info that few others are able to Franc, thank you.

I'd seen the consumer/user manuals on the Sony site, but hadn't found
anything else not even from the eservice site.
I was a bit surprised that none of the various Sony VRD-MCx models had been
mentioned in the SER archives (attributable to the throw-away society
mentality, I guess).

I haven't been doing repair work for quite some time, but I sometimes buy
as-is stuff to see if there's anything interesting to discover (a 2007 model
is far newer than equipment I was familiar with).
I have experience with voltage regulators, and your recommendation is a
sensible approach, if the devices are clearly marked.. I've got
magnification, but odd numbering methods quickly turn a repair into a major
research project.

I'll see if I can get some decent pics posted to Flickr. Replacing caps may
turn out to be a waste of time, but then I'll know better than to buy any
more of this particular model.

--
Cheers,
WB
..............


"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:6lk7b85gpnlve8nr1uuur5rrilisbp3vue@4ax.com...

I couldn't locate a free service manual, but FWIW I found the
following documents during my search.

Technical Bulletin - No Sound when Dubbing / Error Message Appears:
http://www.getmanual.com/gmn/sb/sony/08hv001.pdf

Technical Bulletin - Format Error / No Sound:
http://www.getmanual.com/gmn/sb/sony/08hv009.pdf

Instruction Manual:
ftp://ftp.vaio-link.com/pub/manuals/consumer/VRD-MC5.PDF

Operating Instructions Supplement:
http://portalsso.vansd.org/portal/page/portal/Staff_Portal/Staff_Pages/VSAA_STAFF_PAGES/VSAA_ALT_Jeffers/VSAA_Jeffers_SUBPAGE1/TAB1710002/TAB2501109/Sony_DVD_Recorder_Supplement.pdf

Quick Guide:
http://portalsso.vansd.org/portal/page/portal/Staff_Portal/Staff_Pages/VSAA_STAFF_PAGES/VSAA_ALT_Jeffers/VSAA_Jeffers_SUBPAGE1/TAB1710002/TAB2501109/Sony_DVD_Recorder_QUICK.pdf

I'd look for 3-terminal linear regulators, something like an LD1117-33
or LD1117-18:
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXuqtqv.pdf

Alternatively, look for switchmode step-down buck regulators. These
will be located near coils. I suspect that 3.3V and 1.8V may the Vio
supplies for the main microcontroller and for the SDRAM and flash
memory ICs. The Vcore supply may be 1.25V.

If I'm right, then it could be that the device is in fact in standby
mode, and it may require a common enable signal to turn on each of
these supplies.


A photo would help a lot.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Tue, 27 Nov 2012 07:57:25 +1100, Franc Zabkar
<fzabkar@iinternode.on.net> put finger to keyboard and composed:

Instruction Manual:
ftp://ftp.vaio-link.com/pub/manuals/consumer/VRD-MC5.PDF

Oops, I mistook that for an English manual.

There are also manuals in other languages, but I can't find an English
one:
ftp://ftp.vaio-link.com/pub/manuals/consumer/

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Wild_Bill]

For those who may be interested, the operation/user manuals are on the Sony
site:
http://esupport.sony.com/US/p/model-home.pl?mdl=VRDMC5&template_id=1&region_id=1&tab=manuals#/manualsTab

Other related info:
http://esupport.sony.com/US/p/model-home.pl?mdl=VRDMC5&LOC=3&session_id=64c00a33c34229ed4c75f37fcfd75e14#/howtoTab

--
Cheers,
WB
..............


"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:ndt8b8h2gsfsnf0qcceokq8omig5ga261n@4ax.com...

On Tue, 27 Nov 2012 07:57:25 +1100, Franc Zabkar
fzabkar@iinternode.on.net> put finger to keyboard and composed:

Instruction Manual:
ftp://ftp.vaio-link.com/pub/manuals/consumer/VRD-MC5.PDF

Oops, I mistook that for an English manual.

There are also manuals in other languages, but I can't find an English
one:
ftp://ftp.vaio-link.com/pub/manuals/consumer/

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Wild_Bill]

I've posted several pics of the VRD-MC5 circuit board with brief
descriptions in a Flickr set.
http://www.flickr.com/photos/52345158@N03/sets/72157632122389280/detail/

Some photo viewer programs will allow considerable enlargement with the zoom
feature, enough to make all the silkscreened designations on the board
easily readable (pics taken in 3MB mode are about 800KB in size).

--
Cheers,
WB
..............


"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:6lk7b85gpnlve8nr1uuur5rrilisbp3vue@4ax.com...

A photo would help a lot.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Wed, 28 Nov 2012 05:35:48 -0500, "Wild_Bill"
<wb_wildbill@XSPAMyahoo.com> put finger to keyboard and composed:

I've posted several pics of the VRD-MC5 circuit board with brief
descriptions in a Flickr set.
http://www.flickr.com/photos/52345158@N03/sets/72157632122389280/detail/

For those that wish to avoid a click-fest, here are your hires photos:

http://farm9.staticflickr.com/8339/8225769047_3897c72ff6_k.jpg
http://farm9.staticflickr.com/8069/8225768901_e0e168394c_k.jpg
http://farm9.staticflickr.com/8201/8225768973_2dd5ddcf70_k.jpg
http://farm9.staticflickr.com/8482/8226840940_47385404db_k.jpg
http://farm9.staticflickr.com/8197/8226840872_8253d08a78_k.jpg
http://farm9.staticflickr.com/8067/8226840802_34585756fb_k.jpg
http://farm9.staticflickr.com/8489/8225768647_f0b7e45142_k.jpg
http://farm9.staticflickr.com/8208/8226841246_2273232b3b_k.jpg
http://farm9.staticflickr.com/8198/8225769109_bdde961f4d_k.jpg

I couldn't find any data on the Mediatek MT1888E DSP/RF or MT8108ADE,
but the following service manual has some useful circuit diagrams:

Daewoo DVD Recorder Service Manual (models DW-K3AD2N-DS, DW-K3BD2N-DS,
DW-R631/DW-R632):
http://www.daewoo.cl/sta-info/manuals/vidvd/DW-R631.pdf

The above unit contains a Mediatek MT1888E DSP/RF and MT8105B MPEG
codec. I suspect that the MT8105B might be functionally similar to the
MT8108ADE (or MT8108BDE), but that's only a guess.

Both chips require +3.3V and +1.8V supplies. The board has a
ISL6227CAZ dual PWM controller adjacent to the 3.3V and 1.8V test
points, so I suspect that this IC is responsible for these two
supplies. Each PWM controller has its own enable pin, so I would check
these.

There is also a MOSFET (RSS040P03) near the DC power socket which
appears to function as a high-side power switch. I would confirm that
it is switching +12V.

The AT1796-50A part appears to be responsible for the +5V supply.

The switches are a bit of an enigma. I would have expected that there
would be a microcontroller associated with the display, and that this
would be responsible for waking the board from standby. So why are the
switches on the main board on not on the display PCB? AFAICS, neither
the MT1888E nor the MT8108ADE could be controlling the dual PWM
controller IC (since they are both dependent on the supplies from this
IC). Alternatively, could the power button be connected to some simple
latch logic?

Here are some datasheets that may be helpful:

AT1796-50A, Aimtron, 150kHz, 3A Step-Down Switching Regulator:
http://www.electro-tech-online.com/custompdfs/2012/01/at1796-50_488409.pdf

ISL6227CAZ, Intersil, Dual Mobile-Friendly PWM Controller with DDR
Option:
http://www.intersil.com/content/dam/Intersil/documents/fn90/fn9094.pdf

RSS040P03, Rohm, P-channel MOSFET, -30V, -4A:
http://doc.chipfind.ru/pdf/rohm/rss040p03.pdf

90C46D, OnSpec, ATA/ ATAPI Host to Flash Media R/W Controller:
http://www.onspecinc.com/90C46DMoreInfo/90C46D_Desc.htm
http://www.onspecinc.com/90C46DMoreInfo/90C46D/90C46D_REV0_9.pdf
http://www.google.com.au/search?q=90C46D+filetype%3Apdf+site%3Aonspecinc.com


- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Wed, 28 Nov 2012 05:35:48 -0500, "Wild_Bill"
<wb_wildbill@XSPAMyahoo.com> put finger to keyboard and composed:

I've posted several pics of the VRD-MC5 circuit board with brief
descriptions in a Flickr set.
http://www.flickr.com/photos/52345158@N03/sets/72157632122389280/detail/

I believe U15 is the 2.5V regulator for the SDRAM.

G950T65, Global Mixed-mode Technology, 2.5V 1A Regulator:
http://www.gmt.com.tw/product/datasheet/EDS-950.pdf

G2996, Global Mixed-mode Technology, DDR I/II Termination Regulator:
http://www.gmt.com.tw/product/datasheet/EDS-2996.pdf

BTW, T3 looks more like a common mode line filter rather than a dual
3A fuse. The logo appears to belong to TDK.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Thu, 29 Nov 2012 21:10:26 +1100, Franc Zabkar
<fzabkar@iinternode.on.net> put finger to keyboard and composed:

G2996, Global Mixed-mode Technology, DDR I/II Termination Regulator:
http://www.gmt.com.tw/product/datasheet/EDS-2996.pdf

This device appears to be responsible for the 1.25V supply. It has a
shutdown pin (SD). It might be an idea to see where this pin goes. I
suspect it will go to the same chip as the enable pins for the 3.3V
and 1.8V supplies.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[N_Cook]

Wild_Bill <wb_wildbill@XSPAMyahoo.com> wrote in message
news:6cpss.771079$%Q3.644592@en-nntp-15.dc1.easynews.com...

I haven't found any info regarding repair of these DVDirect recorders, and
was wondering if anyone had accomplished any repairs.
http://store.sony.com/p/VRD-MC5/en/p/VRDMC5
The production date is 2007.
These Sony VRD DVDirect recorders record to DVD from sources of composite
or
S-video, digital video/firewire, and memory cards.. or directly from some
models of Handycams.

The unit appears to be dead, except that the "power on" LED turns on when
the Power button is pressed (but doesn't turn off when pressed again).
No display on the LCD, no drawer extend when Eject is pressed and no other
LEDs are illuminated (there are several mounted directly to the board for
diagnostic purposes, presumably).
The circuit board is marked with some voltage test points, and the only
voltages which are present are 12V (input voltage) and 5V.

Missing are 3.3, 1.8 and 1.25V, however I'm not certain that all of these
are standby voltages.

I've only seen and checked 1 fuse (a dual 3A device) and there doesn't
appear to be any others.

Any info related to the missing voltages and functions would be very much
appreciated.

--
Cheers,
WB
.............

Before getting bogged-down in hardware fault scenarios, did someone try
de-zoning it , via firmware upload?

 

[mike]

On 11/25/2012 5:40 PM, Wild_Bill wrote:

After spending some time checking various other marked test points to
make some notes, also checked the ESR of the aluminum electrolytic
surface-mount caps (absolutely fantastic tool.. thanks, Bob Parker).

Out of the 8 caps marked 10uF 16V, 5 of 'em had ESR readings of 9 or 10
ohms.
The larger value caps (100uf, 220uf 16V) had reasonable ESR readings.

One of the larger caps(?) is clearly marked 220C UD.. I dunno what
that's supposed to mean, but it looks identical to the other 220uF caps,
including the black semicircle for the negative terminal.
Anyone familiar with these markings?

I'll see if I can get some replacement caps, and report back with any
changes.

Before you spend a lot of effort finding and replacing caps, I suggest
you bridge the suspected caps with standard leaded caps and see if the
system can be revived.

Consider this scenario.
You have a buck converter that converts 20V down to 5V.
As the caps age and increase in ESR and/or decrease in value,
ripple starts to appear. The end-stage is an open cap and
20V spikes with 25% duty factor. The average value is still 5V cuz the
regulator
probably tries to average it. And that might still be what
you read on your voltmeter, depending on its topology.

Problem is that the 20V killed the IC's some time ago.
No amount of cap replacing will fix that.

--
Cheers,
WB
.............


"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:6cpss.771079$%Q3.644592@en-nntp-15.dc1.easynews.com...

The unit appears to be dead> The circuit board is marked with some
voltage test points, and the only voltages which are present are 12V
(input voltage) and 5V.

Missing are 3.3, 1.8 and 1.25V, however I'm not certain that all of
these are standby voltages.

Cheers,
WB
.............

 

[Wild_Bill]

Thanks Mike, I agree with the scenario you presented as being a
possibility.. so troubleshooting with an oscilloscope would likely be much
more revealing.

I was expecting to get lucky since the unit is nearly completely dead, but
that seems less likely now.

--
Cheers,
WB
..............


"mike" <ham789@netzero.net> wrote in message
news:k97i8r$3f3$1@dont-email.me...

Before you spend a lot of effort finding and replacing caps, I suggest
you bridge the suspected caps with standard leaded caps and see if the
system can be revived.

Consider this scenario.
You have a buck converter that converts 20V down to 5V.
As the caps age and increase in ESR and/or decrease in value,
ripple starts to appear. The end-stage is an open cap and
20V spikes with 25% duty factor. The average value is still 5V cuz the
regulator
probably tries to average it. And that might still be what
you read on your voltmeter, depending on its topology.

Problem is that the 20V killed the IC's some time ago.
No amount of cap replacing will fix that.

 

[Wild_Bill]

You've delivered a great amount of information Franc.. thanks for your
efforts.

So why are the switches on the main board on not on the display PCB?

There is only the one board in the VRD-MC5. Not included in the pics, but
the LCD display flex cable connects to the slim brown connector in the upper
left sector (below the coil marked 820 of pic VRD-MC5e).
The 4 switches (north, south, east, west) around a centered switch are for
navigating the displays' menu selections.

I wanted one of these units to use for transferring my body-worn DVR and
camera images directly to DVD without needing a computer.

I received a previous model of this unit this week, the previous years'
VRD-MC1.
The MC1 has a smaller LCD, and the board is vaguely similar to the MC5.
The MC1 uses a conventional ATAPI DVD drive (the MC5 uses a different type
with only 2 flex cables), so if the drive fails, it may be possible to swap
it out.

--
Cheers,
WB
..............


"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:1r7eb8tkrnq5iqp6tj6mts559ihe8uhfsc@4ax.com...

For those that wish to avoid a click-fest, here are your hires photos:

http://farm9.staticflickr.com/8339/8225769047_3897c72ff6_k.jpg
http://farm9.staticflickr.com/8069/8225768901_e0e168394c_k.jpg
http://farm9.staticflickr.com/8201/8225768973_2dd5ddcf70_k.jpg
http://farm9.staticflickr.com/8482/8226840940_47385404db_k.jpg
http://farm9.staticflickr.com/8197/8226840872_8253d08a78_k.jpg
http://farm9.staticflickr.com/8067/8226840802_34585756fb_k.jpg
http://farm9.staticflickr.com/8489/8225768647_f0b7e45142_k.jpg
http://farm9.staticflickr.com/8208/8226841246_2273232b3b_k.jpg
http://farm9.staticflickr.com/8198/8225769109_bdde961f4d_k.jpg

I couldn't find any data on the Mediatek MT1888E DSP/RF or MT8108ADE,
but the following service manual has some useful circuit diagrams:

Daewoo DVD Recorder Service Manual (models DW-K3AD2N-DS, DW-K3BD2N-DS,
DW-R631/DW-R632):
http://www.daewoo.cl/sta-info/manuals/vidvd/DW-R631.pdf

The above unit contains a Mediatek MT1888E DSP/RF and MT8105B MPEG
codec. I suspect that the MT8105B might be functionally similar to the
MT8108ADE (or MT8108BDE), but that's only a guess.

Both chips require +3.3V and +1.8V supplies. The board has a
ISL6227CAZ dual PWM controller adjacent to the 3.3V and 1.8V test
points, so I suspect that this IC is responsible for these two
supplies. Each PWM controller has its own enable pin, so I would check
these.

There is also a MOSFET (RSS040P03) near the DC power socket which
appears to function as a high-side power switch. I would confirm that
it is switching +12V.

The AT1796-50A part appears to be responsible for the +5V supply.

The switches are a bit of an enigma. I would have expected that there
would be a microcontroller associated with the display, and that this
would be responsible for waking the board from standby. So why are the
switches on the main board on not on the display PCB? AFAICS, neither
the MT1888E nor the MT8108ADE could be controlling the dual PWM
controller IC (since they are both dependent on the supplies from this
IC). Alternatively, could the power button be connected to some simple
latch logic?

Here are some datasheets that may be helpful:

AT1796-50A, Aimtron, 150kHz, 3A Step-Down Switching Regulator:
http://www.electro-tech-online.com/custompdfs/2012/01/at1796-50_488409.pdf

ISL6227CAZ, Intersil, Dual Mobile-Friendly PWM Controller with DDR
Option:
http://www.intersil.com/content/dam/Intersil/documents/fn90/fn9094.pdf

RSS040P03, Rohm, P-channel MOSFET, -30V, -4A:
http://doc.chipfind.ru/pdf/rohm/rss040p03.pdf

90C46D, OnSpec, ATA/ ATAPI Host to Flash Media R/W Controller:
http://www.onspecinc.com/90C46DMoreInfo/90C46D_Desc.htm
http://www.onspecinc.com/90C46DMoreInfo/90C46D/90C46D_REV0_9.pdf
http://www.google.com.au/search?q=90C46D+filetype%3Apdf+site%3Aonspecinc.com


- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Wild_Bill]

I should'a looked at the board designation, but I was expecting to see a
fuse, and when it was marked with 3A and some other numbers, I "saw" a fuse.

Good catch Franc.

--
Cheers,
WB
..............


"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:qvceb8l71up2jr47l61ccjfesh3i3n9hgq@4ax.com...

On Wed, 28 Nov 2012 05:35:48 -0500, "Wild_Bill"
wb_wildbill@XSPAMyahoo.com> put finger to keyboard and composed:


I believe U15 is the 2.5V regulator for the SDRAM.

G950T65, Global Mixed-mode Technology, 2.5V 1A Regulator:
http://www.gmt.com.tw/product/datasheet/EDS-950.pdf

G2996, Global Mixed-mode Technology, DDR I/II Termination Regulator:
http://www.gmt.com.tw/product/datasheet/EDS-2996.pdf

BTW, T3 looks more like a common mode line filter rather than a dual
3A fuse. The logo appears to belong to TDK.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Wild_Bill]

Certainly a possibility Nigel.. there are firmware updates for these units,
although I don't have any experience with failed updates so I don't know
what the corruption results would appear as.

This unit was a used, as-is item, so its history is unknown, although it was
easy to determine that someone had previously disassembled it.. broken flex
connector, missing drive drawer faceplate and other signs.

--
Cheers,
WB
..............


"N_Cook" <diverse@tcp.co.uk> wrote in message
news:k97gq5$reo$1@dont-email.me...

Before getting bogged-down in hardware fault scenarios, did someone try
de-zoning it , via firmware upload?

 

[N_Cook]

Wild_Bill <wb_wildbill@XSPAMyahoo.com> wrote in message
news:cSVus.270211$%p1.117032@en-nntp-02.dc1.easynews.com...

Certainly a possibility Nigel.. there are firmware updates for these
units,
although I don't have any experience with failed updates so I don't know
what the corruption results would appear as.

This unit was a used, as-is item, so its history is unknown, although it
was
easy to determine that someone had previously disassembled it.. broken
flex
connector, missing drive drawer faceplate and other signs.

--
Cheers,
WB
.............


"N_Cook" <diverse@tcp.co.uk> wrote in message
news:k97gq5$reo$1@dont-email.me...

Before getting bogged-down in hardware fault scenarios, did someone try
de-zoning it , via firmware upload?

As a favour to a good customer I said I'd look at his non working DVD and
went down much the same path as you are. The next day he said , oh by the
way it stopped working after I borrowed a de-zoning disk.
If anyone knows a signature to look out for , characteristic of this
soft/firmware condition as distinct from hardware failure?