I believe the component identified by the arrow in the attached picture is an inductor (high Q, multilayer chip inductor?), but I need specifications sufficient to allow me to find a replacement. I damaged this component with a solder splatter while replacing the USB port. There is virtually no CDMA/LTE signal reception without it.
Even if a schematic can be found out there on the interwebs (I haven't found one, though), would it help me identify it? Any leads? Thanks folks.
Related
Hello,
i want to connect external wifi antenna to S620 and i need some small help with that.
I dismantled the phone and removed shields from all ICs.
On picture 2 and 3 are Texas Instruments WiFi chips.
On picture 1 is other side of the board, with some metal piece and connector, which might be external wifi connector.
The connector is at opposite side in left bottom corner if you look at image 2, between PASS sticker and mounting hole, at the corner of large PCB ground pole.
Is that metal piece integrated antenna?
That connector is probably not U.FL.
Anyone know what type of connector is that?
Thanks.
Not sure but follow the link below for the service manual, it may give you some insight:
http://forum.xda-developers.com/showthread.php?t=402998&highlight=service+manual
if you managed tu connect it, let us know everything...
hope you can do it succesfully!!!
Ok, so i looked at the service manual, the connector is diagnostic (RF measurement) type, with switch.
MM8430-2600RA1
Probably will be in all HTC devices. So i will try to search on the forum, if anybody done this on different phone.
See page 9 and 10 for switch schematics and pinout
http://www.murata.com/catalog/o30e8.pdf
There are "probe" cables for it, but the probe connector is too big to hide under the cover.
I have a friend with experience with SMD, so i asked him if he can desolder it and solder pigtail with RSMA.
Cable can be taken out of the phone by using free space around hole which covers the GSM antenna connector.
I verified that by putting the cable in and closing the phone.
I also tried to hold stripped cable on the connector, with attached directional antenna and i picked up the APs in that direction, so it is working. (and really well)
The problem is that ground poles of the connector maybe connects ground to the power button, so after desoldering, it might not be possible to turn it on...
The safe way can be removing that piece of metal (yes, it is wifi antenna) and solder pigtail instead of it.
It should be simple, because under it are only two "paths" in PCB.
However, the best way is probably to solder it on opposite side, there is a PCB path from Wifi chips, going through the PCB, ending on middle pin of the connector.
But that cannot be done, because there is no way how to get the cable out of the phone.
I still prefer desoldering the connector, because it is placed "before" the antenna, so connecting it there would give a bit better results.
Edit: i searched the forum a bit, but all i found is service manual for Diamond, which seems to have U.FL connector. But i will not buy it because of that, only maybe when it will cost 80 USD like S620.
Hi,
When tearing down the phone to replace the front bezel, I have managed to disconnect the GPS antenna from its connector.
As the connector and cable are both very small, i'm unsure if I can repair it. I can also find no information online regarding the type of cable, and connector. it looks like a very small coaxial cable, complete with shielding.
I also looked online for a replacement GPS module for the phone, but cannot find any information as to what GPS module and antenna is in the phone, or source replacement parts.
i was wondering if anyone had experienced the same problems? If anyone can offer tips / advice on :
* how to either repair the antenna
* any technical information for the gps antenna / module part numbers manufacturers etc
* any resources that stock this gps module and antenna.
if anyone happens to have spare parts lying around, I am more than happy to pay for the GPS module / antenna if you can part with it
Thanks for your help
Allan
It seems that I have either been too careless when changing my broken display, or I have a typical monday example from the production floor... Because the big flat cable connector mounted on the mainboard has cracked and a corner piece has broken off completely.
I managed to glue it back into place, but there's some plastic missing between the wired connection points. This means (seems to anyway) that my MicroSD slot is busted and is currently short circuiting the whole phone if any MicroSD is mounted.
Now my question:
Is there anyway to buy an entirely new one of these connector ports?
I've looked high and low online (eBay and otherwise), however I really don't know the proper terminology to search accurately.
I work in electronic manufacturing and we actually have connectors in stock, very similar to the one I need, but obviously similar doesn't cut it - I need the exact model used. If I had one I could easily solder it in place at work...
Does anyone have any ideas of how to find one?
I include one picture to clarify which connector I am talking about. It is not a pic of my actual mainboard, but a pic from eBay that I marked, just to give a general idea.
Hi,
I want to make a small project and I thought of using N7 2013 LCD because this display have full-hd resolution 16:10. I know how to hook up a previous N7 lcd (2012 aka gen1) to DVI-LVDS adapter, but I wanted higher resolution
FYI: Designing and building pcb circuit is not difficult thing to do for me so this is not issue.
I tried to get in my hands a datasheet for LCD panel but no luck. The number printed on LCD is almost different for each display photo that I found - so this is not a panel symbol.
So the point is: I would like to ask someone that have ME571K repair guide, if he/she could share with me a part (screenshot) where is a LCD connector on motherboard described (signal names, pinout, connector manufacturer & part number).
I would be really happy, I sb actually shared a more information: a whole way from CPU to the LCD panel - this would be terrific - but this a little too much to ask
saper_2 said:
I would like to ask someone that have ME571K repair guide, if he/she could share with me a part (screenshot) where is a LCD connector on motherboard described (signal names, pinout, connector manufacturer & part number)
Click to expand...
Click to collapse
Hi, I don't have the pinouts nor repair guide, but here are manufacturer & part numbers...
Just search online for lcd monitor driver board ...you will find some good results
@k23m - thanks, but actually I need a other side connector of the LCD FPC P/N the one you connect to main board:
@deadgiveaway - you mean DVI/HDMI to LVDS adapter board? I know them (and I plan to use one but this is not issue), but I'm looking at least for a pinout of LCD FPC connector or the mainboard connector to lcd FPC (on the attached photo). Without this information the "adapter board" (DVI/HDMI to LVDS) is useless. I've done some reverse engineering on the FPC connecting mainboard with LCD and I've got in result some questions, e.g.: I'm certain there is a 6 differential signal pairs, but LVDS commonly use: 4 or 8, but I found in some datasheet there might be 6 too (rare case). Also the CPU Snapdragon have multiple video interfaces: HDMI, LVDS and (the worst case for me) MIPI-DSI.
Just got an some idea, there might be some information about display interface in /sys (linux/android file system path ) on Nexus 7.
Hi,
Thanks for attempts to help me. Unfortunatly I found out looking at /sys/calss/graphics/fb0/msm_fb_type ...
Code:
[email protected]:/sys/class/graphics/fb0 $ ls
bits_per_pixel
blank
console
cursor
dev
mode
modes
msm_fb_fps_level
msm_fb_type
name
pan
power
rotate
state
stride
subsystem
uevent
virtual_size
vsync_event
[email protected]:/sys/class/graphics/fb0 $ cat msm_fb_type
mipi dsi cmd panel
MIPI-DSI interface is no good for any use for me (there is no doc publicly available...). So I'm going to use lcd from N7 2012
Ps. For interested, is possible to use LCD from nexus 7 2012. A user aBUGSworstnightmare @ Raspberrypi forum, managed to hook up LCD from N7 2012 to DVI-LVDS converter/adapter: https://www.raspberrypi.org/forums/viewtopic.php?p=1052828#p1052828
!close
Im trying to find the pinout moto x play or any other mobile displays. But I wasn't get any success
Can you tell me how did you get these pinout information
I'm doing a project on HDMI input to the display I found a module on hackaday project
Look fo service manual schematic for you phone. But almost always in displays that have resolution over 640*480 you find only mipi dsi interface. To get datasheet from manufacturer ( and MIPI DSI interface spec too ) is almost impossible [emoji3525] - unless you work for company and sign NDA with them for docs ...
Sent from my VTR-L29 using Tapatalk
Since I've purchased the Joying JY-UQD11N6G I have had nothing but problems with it. Such as:
The device will not power off or sleep when the ignition is switched off no matter the configuration.
The connected amp constantly remains on.
4G does not work with one of the suggested provider's SIM (T-Mobile). The SIM is recognized, works in other phones, but zero bars. Support has zero solution, and the solution in the blog does nothing.
A one pixel wide red line from top to bottom exists in the display. Support will not replace it.
These are just a few of the issues. So i've decided to scrap the board. I'm going to keep the display and the case and put either a Raspberry Pi 4 or a Radxa Rock 3a w/ 8GB of RAM in the case. I'll put a Hi-fi Berry hat or something similar on top for digital audio output and 5.1 signal processing to run to the amp. I could really use some help with the pinout of the UIS7862 40 pin display connector from the community. I can't find this or a schematic for the device anywhere. I'm not certain if this is just using the same protocols as the GPIO standard or if it's something custom.
Looking inside the display case one finds a board with a large 40 pin connector on the back. Its mipi dsi/csi to edp converter is the Lontium LT8911EXB chip, but the board has no part number on it, so again, I can find no schematics/manual. Both the LCD display connect to this via a 40-pin ribbon and 2-pin wire harness, and the capacitive touchscreen via a 6-pin ribbon. I've attached pics of the board and the PDF that has some info about the chip.
So I'm not sure if the display connector on the UIS7862 is an unconventional adaptation of a DSI 40-pin output or a GPIO interface, but whatever it is, it carries the display data, touch data, and power for both. If anyone has a schematic showing the pinout, the actual FYT manual from this year or the last few years, or any information about this display that would be appreciated!
Bump