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-   -   Apple Cinema Display 23" (PCB Q49C or info about transistor) (http://www.ehmac.ca/showthread.php?t=84366)

issic Feb 7th, 2010 07:08 PM

Apple Cinema Display 23" (PCB Q49C or info about transistor)
 
2 Attachment(s)
Hi,

looking for info about Apple Cinema Display Power Board. Mine is burned out. Actually maybe only one transistor. See attachment.

Looking for PCB Q49C V115 (main powerboard) for replacement for 23" ACD HD

OR

Info about what is WRITTEN on that TRANSISTOR (where the red arrow is or the one burned in the detail photo) if somebody can open or have open your 23" cinema display and let me know...Position of the transistor is "Q1"

Any help appreciated.

sim Sep 18th, 2010 05:49 AM

Hello! I am investigating another monitor with a similar broken board. The 3.3V regulator was shot but it also seems that the transistor you mention is shorted and the (LM)2672 nearby also has 0V on all pins except Vin (probably also shot). The transistor in your picture reads "HEVQ9" on mine, but I am not sure what that means. Any luck on yours in the meantime?

issic Oct 27th, 2010 06:09 PM

No no luck. it sits in corner disassembled for the 9 months already. Anybody know or have a part Q4849C-M1.BRD ? I will buy it...

sim Oct 27th, 2010 06:28 PM

Hey,

I did manage to get mine working. It turns out it was just the regulator, and the circuits around it which were reading 0V are 0V until the monitor gets a video signal.

Do you still need a pic of that transistor? I forgot to get one for you specifically, but here is one slightly out of focus one of my post-mod: http://0x.ca/sim/tmp/387068-f.jpg (look on the very edge).

What is part Q4849C-M1.BRD ?

Cheers :)

issic Oct 27th, 2010 06:36 PM

Hey congratulation! Q4849C is the whole logic board. or 0171-2282-2281.

I found out just one on Ebay! But they will not ship to Europe. Damn! And I couldn't find a way to contact the seller. He has no EMAIL ADDRESS!!! Not even on his original websites! Even on TWITER I can't find it! Grrrrr I'm so close and far away....

Apple 23" Cinema Display HD Logic Board - eBay (item 270630615845 end time Nov-02-10 11:01:26 PDT)

That's THE PIECE! I want it and pay 200$ or more! Damn!

issic Oct 27th, 2010 06:48 PM

Hey Sim, can you get some values out of that piece you described please "HEVQ9"? What kind of transistor this could be? The number on it didn't return any results.... so I may find something similar and just solder it there...any idea?

sim Oct 27th, 2010 08:33 PM

He seems to be hard to find, but there is a phone number on idavidcomputers.com. Maybe try that? Kind of sucks to pay that much if all you need is a transistor, though. I'd probably rather look for a dead monitor at that price. Chances are you could steal just that part or find out what it is and maybe get two working monitors. :)

I'll have to take mine apart again to check out that part, which is kind of a pain. I'll see if I can find some time to do it.

issic Oct 27th, 2010 08:35 PM

Sure understand, it is pain :-) It's good is working. If you have any info what kind of transistor is it and possible replacement, let me know. Thanks Sim.

kkmanuele May 17th, 2011 09:21 AM

hi, i'm italian. sorry my english, but i have some problems.
My transistor q1 is down, my q1 is H6FU9 on mine, but I can not find anything with this symbol !
can you help me?

kkmanuele May 18th, 2011 04:59 AM

hi guys!!
i have found this documents, vq9 is SC70!!!
but were i found this transistor??


http://www.gioiepergioco.com/foto/Cattura.JPG

chimo May 19th, 2011 11:25 AM

Quote:

Originally Posted by kkmanuele (Post 1095661)
hi guys!!
i have found this documents, vq9 is SC70!!!
but were i found this transistor??

SC70 is a case style. Those are not transistors in the diagram.

issic:
From the pics, the board seems to have at least three voltage regulator circuits.

The transistor that's blown seems to have some heat sinking (there are a few vias visible in sim's pic around the device. If thay are just for this transistor, then that can help narrow the search a bit.

Are there components on both sides?
Can you provide some better macro photos of the board that shows the traces and the top marks of the devices in that area?
Is the black connector a power connector?

kkmanuele May 19th, 2011 11:40 AM

replacing the transistor with two 1N4148 Dioni find 24 volts on the anode of a diode and 12 volts on the anode of the other diode. but to pin 7 V in the LM2672 can not find tension.

GlassOnion May 21st, 2011 02:25 PM

Quote:

Originally Posted by kkmanuele (Post 1095661)
hi guys!!
i have found this documents, vq9 is SC70!!!
but were i found this transistor??


http://www.gioiepergioco.com/foto/Cattura.JPG

Try Electronic Components Distributor | DigiKey Corp. | CA Home Page

bradkarhu Aug 10th, 2011 03:41 PM

My Q1 looks exactly the same as yours issic. The right side is blown off. What's left reads H6F and a partial U so I'm guess it's the H6FU9 that kkmanuele mentioned.

All I've been able to find is this information on H6:

Device = BCW89R
Manufacturer = Phi (Phillips)
Base = R (?)
Package = SOT23R

The 3rd char is F which refers to this:

___|G|___
|________|
. |D| . . . |S| (ignore the spacing dots)

What does the U9 refer to? Any clues what replacement part I need?

risck Mar 14th, 2012 11:42 AM

CFD 1081/1082 Transistor Q1
 
Quote:

Originally Posted by bradkarhu (Post 1120798)
My Q1 looks exactly the same as yours issic. The right side is blown off. What's left reads H6F and a partial U so I'm guess it's the H6FU9 that kkmanuele mentioned.

All I've been able to find is this information on H6:

Device = BCW89R
Manufacturer = Phi (Phillips)
Base = R (?)
Package = SOT23R

The 3rd char is F which refers to this:

___|G|___
|________|
. |D| . . . |S| (ignore the spacing dots)

What does the U9 refer to? Any clues what replacement part I need?


The thread i9s somewhat outdated, but I think there are many questions left.

I found this for Q1:

There are several codes referred here to Q1 like:

H6 FU9
HE VQ9
HF XS5

I think that only the first two letters are signicant together with the package
(SOT-23 or 2.9 x 1.5 mm).

H6 should be a pnp-Transistor like BCW89R, but Q1 is not pnp.

HE may be a npn-transistor 2SC3123 or 2SC4250 (Toshiba).
HF is similar 2SC3124 (Toshiba)

The three following letters ar not significant.

I think this information may help someone out there.

hexdiy Apr 1st, 2012 11:25 AM

Vielen Dank, Herr risck. I think I have to add the ID of my "Q1" to the list: HEZ H4 According to this link, H4 is: a BCW69R, a BC177A equivalent in a SOT23R package. H6 is: a BCW89R, a BC556 equivalent, also in a SOT23R package. Both the BC177A and the BC556 come in a TO-92 package.
I believe a 2N4403 will do also, but please do check the specsheets! SOT23 equivalent of this reads 2T.
Both H4 and H6 are PNP, but in a reversed package. Could this be the reason for your remark
Quote:

H6 should be a pnp-Transistor like BCW89R, but Q1 is not pnp
?
Whichever equivalent you use, be very sure to mind the difference in pinout for the different packages!
Anyhow, I will be acting on these specs presently and post the results ASAP.
Thanks again for your post!

drewreece Apr 1st, 2012 01:34 PM

Hey,
Welovemacs has this board…
0171-2242-1471 20" & 23" Apple Aluminum Cinema Display Main Inverter Board
It claims to be an inverter board, but the picture is the main board, worth confirming if you are interested in getting the entire board.

issic's old ebay link had a few main boards on sale…
Apple | eBay

I have this bad picture I took when I fixed a different LDO on a friends 23" ACD…
http://dl.dropbox.com/u/59660/IMG_1608.JPG
I can't identify the ic from the picture, sorry.

I have a working 23" display but I haven't opened it at all, I don't know if it would actually help to have another pic of the component? Isn't the main problem identifying the part from the info printed on it?
I guess I could put a meter across it to see what it's operating voltage is but is everyone sure what type of component it is?

I don't really want to short out an unknown component in a working display.

hexdiy Apr 1st, 2012 09:03 PM

Thanks, Drew! Just so you know: I am very intrigued by this ACD issue, and by sheer stubbornness I've been at mine all day. Not that I am really in need of a 20" or 22" lcd display, I just want to know.
I do not really want to spend more money on it (only spent 30€ in the first place), I just want to get the component level repair done properly, and in doing so, maybe find out what is bugging such an awful lot of these machines.
Quote:

Isn't the main problem identifying the part from the info printed on it?
Indeed, for the main part it is: SMD nicknames are quite a bother to decipher! Although I am now fairly sure Q1 on my ACD 20" is either an H4 or H6 transistor, meaning a simple BC177A or BC556 equivalent in a SOT23R package. In my last post I was mistaken: although the BC556 indeed comes in a TO-92 package, the BC177A seems to be dressed in an ancient TO-18 full metal jacket :-)
The issue right now is the pinout for SOT 23R: on the Net, e.g. there seem to be circulating faulty pinouts in different locations. Whereas the right one, I think is just the mirror image of the SOT 23 (confirmed by this quote:
Quote:

Reverse joggle devices do present a few problems. They oftern have an 'R' in the type number. A reverse
package is one where the lead have been bent up instead of down. So it's a mirror image of a conventional
device. Identification is usually possible from the code number, but some manufacturers use the same code. In
these cases, it's a case of looking at the device with a magnifying glass. The leads of most normal packages
come out closer to the circuit board side of the device; conversely a reverse joggle package will have them
coming out closer to the 'top' of the device.
So following this logic, the right pinout will read in my opinion: top/id print view; Collector on top, Emitter bottom left, Base bottom right.
Please do not harm any component in a working display on my account! I am just experimenting with a faulty display mainly out of curiosity. With an eventual bonus of having a working specimen, of course.
A pretty good picture of the whereabouts of Q1 in question have already been posted earlier in this thread.
Anyhow, thanks an awful lot for your kind cooperation! I intend to get to the bottom of this, but do not follow my folly if you have a regular dayjob!

risck Apr 2nd, 2012 07:28 AM

Q1 Code
 
Quote:

Originally Posted by hexdiy (Post 1183667)
my "Q1" to the list: HEZ H4

I think your "Q1" reads "HExxx" not "xxxH4".

On my board "Q1" is "HEXS5" and definetely not a reverse package, since the leads are near the board.

hexdiy Apr 3rd, 2012 10:14 AM

Sorry for my persistance, but given these specs of the2SC3123:
Quote:

Type Designator: 2SC3123
Material of transistor: Si
Polarity: npn
Maximum collector power dissipation (Pc): 150mW
Maximum collector-base voltage (Ucb): 18V
Maximum collector-emitter voltage (Uce): 20V
Maximum emitter-base voltage (Ueb): 3V
Maximum collector current (Ic max): 50mA
Maximum junction temperature (Tj): 180°C
Transition frequency (ft): 900MHz
Collector capacitance (Cc), Pf: 0.5
Forward current transfer ratio (hFE), min/max: 40/300
Manufacturer of 2SC3123 transistor: TOSHIBA
Package of 2SC3123 transistor: TO236
Application: RF, Medium Power General Purpose
,
and seeing one of its contacts are connected directly to the 24.675 V of the powerbrick, I think it should immediately blow up. Or am I completely mistaken?
Also, the form factor does not seem right.
Moreover, why am I unable to locate any HE or HF types in different SMD codebooks?
Great thanks for thinking along, BTW!

risck Apr 4th, 2012 10:23 AM

Info about transistor Q1
 
Quote:

Originally Posted by hexdiy (Post 1184203)
Moreover, why am I unable to locate any HE or HF types in different SMD codebooks?

Look here for marking HF
<http://www.datasheetcatalog.org/datasheet/toshiba/1264.pdf>
2SC3124

and here for marking HE
<http://www.datasheetcatalog.org/datasheet/toshiba/1283.pdf>
2SC4250

Form factor is SOT-23 just like Q1.

ixusss Sep 29th, 2015 10:18 AM

loking at this link found different models/ I'm confused:cool:
Data Sheet Catalog: Begin marking SMD with H
In additional to previous I have Q1- H7XZ1


H6xxx Si2366DS SOT-23 N-Channel 30 V (D-S) MOSFET

H7xxx Si2367DS SOT-23 P-Channel 20-V (D-S) MOSFET

HExxx AP130-38R SOT23R-3L 3.8V 300mA Low Dropout (LDO) Linear Regulator

HFxxx AP130-39R SOT23R-3L 3.9V 300mA Low Dropout (LDO) Linear Regulator

Johnbonham Jan 14th, 2019 05:34 AM

1 Attachment(s)
My 23" Cinema display Q1 transistor died. The code is HFMV. Anyone help me to which component i should use?

pm-r Jan 14th, 2019 07:04 PM

Quote:

Originally Posted by Johnbonham (Post 2677992)
My 23" Cinema display Q1 transistor died. The code is HFMV. Anyone help me to which component i should use?


Have you tried some Google searches such as this:
https://www.google.com/search?q=23%2...hrome&ie=UTF-8

And this one from there looks rather similar and maybe some of the contacts are still available who can help:
https://www.ehmac.ca/mac-iphone-ipad...ransistor.html


But is that display really worth fixing considering the improvements that have been made to monitors all these last several years? And most have dropped their prices for actually comparatively much better quality displays.




- Patrick
======

Johnbonham May 6th, 2019 07:30 PM

Quote:

Originally Posted by pm-r (Post 2678088)
Quote:

Originally Posted by Johnbonham (Post 2677992)
My 23" Cinema display Q1 transistor died. The code is HFMV. Anyone help me to which component i should use?


Have you tried some Google searches such as this:
https://www.google.com/search?q=23%2...hrome&ie=UTF-8

And this one from there looks rather similar and maybe some of the contacts are still available who can help:
https://www.ehmac.ca/mac-iphone-ipad...ransistor.html


But is that display really worth fixing considering the improvements that have been made to monitors all these last several years? And most have dropped their prices for actually comparatively much better quality displays.




- Patrick
======



Thank you. I tried too much things. And i need still help for this situation, because i think its worth to me.


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