The LCD screen on my Roland Fantom XR rack synthesizer has gone blank. I managed to get the schematics for the connection to the LCD.
The standard LCD has D0 to D7 pinouts (in addition to the normal VDD, VSS, CS, RES, RW, EN etc).
Can someone help me to identify what V1 to VR is for? Also how does VR work?
Any help is truly much appreciated....
No content found
Please log in to your account to view your subscribed posts.
| Directory | Topics | Posts | Last Post | |||
|---|---|---|---|---|---|---|
| Badcaps Capacitor & Electronics Repair Forum | ||||||
|
Frequently Asked Questions (No Posting)
All new members, PLEASE READ HERE FIRST! Posting only allowed by established members.
Topics: 45
Posts: 733
|
45 | 733 |
|
|||
|
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 235
Posts: 42,506
|
235 | 42,506 |
|
|||
| Document & Software Archive | ||||||
|
Common Parts Library - Datasheets
Share or download datasheets or application notes for electronic components and other parts. Contribute your knowledge or ask questions. Before using please read our Terms of Service.
Topics: 2
Posts: 5
Last Post:
ncp81208 datasheet
|
2 | 5 |
|
|||
| General Topics | ||||||
|
General Capacitor Questions & Issues
Questions and answers for identifying whether your device has bad capacitors. Also post general capacitor-related questions and issues here.
Topics: 3,195
Posts: 32,740
Last Post:
How can I test non-polarized capacitor?
|
3,195 | 32,740 |
|
|||
|
General Computer & Tech Discussion
Have just a general computer question, post it here. This can be anything from an OS issue, hardware issue not related to capacitors, upgrade question, or whatever basic tech-related issue is on your mind.... This is also a good place to share your tech projects!
Topics: 4,507
Posts: 74,894
Last Post:
Find owner of MacBook air with icloud lock
|
4,507 | 74,894 |
|
|||
| Troubleshooting Hardware & Devices and Electronics Theory | ||||||
|
General Electronics Technical Discussion
If you have a general question concerning basic electronics theory or component function & usage, here's where it goes.
Topics: 3,996
Posts: 44,537
|
3,996 | 44,537 |
|
|||
|
Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Technical discussions covering any type of desktop motherboard, video/graphics card, controller card, or whatever other desktop peripheral you need help with. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 6,898
Posts: 37,720
Last Post:
bios dump for HP Prodesk 600 G2 sff Desktop
|
6,898 | 37,720 |
|
|||
|
Sub-Forums:
| ||||||
|
Troubleshooting & Designing Networks
Post your computer network questions, ideas, gripes, and so on in here. This can be any type of network, whether its cabled, wireless, or whatever. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 502
Posts: 5,457
Last Post:
4G LTE router sim socket replacement
|
502 | 5,457 |
|
|||
|
Troubleshooting Laptops, Tablets, and Mobile Devices
Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 32,280
Posts: 308,912
|
32,280 | 308,912 |
by Deby
Yesterday, 03:11 PM
|
|||
|
Sub-Forums:
| ||||||
|
Troubleshooting Computer Displays
Technical discussions covering any type of PC/computer display, whether it be CRT, LCD, or anything else. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 5,332
Posts: 75,746
Last Post:
Dell U3011 no display after a few minutes
|
5,332 | 75,746 |
|
|||
|
Troubleshooting TVs and Video Sources
Technical questions about your defective television, projection screen, LCD/plasma, or any other type of video device. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 27,506
Posts: 375,310
Last Post:
Rca RWOSU7047 No Picture
|
27,506 | 375,310 |
|
|||
|
Troubleshooting Power Supplies and Power Supply Design
Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 4,196
Posts: 65,354
Last Post:
Dell optiplex PSU problem
|
4,196 | 65,354 |
|
|||
|
Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices
Technical questions about your defective laser or ink printer, plotter, copier, scanner, and other imaging & printing devices. This section also includes digital cameras. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 307
Posts: 1,689
Last Post:
Celestron PentaView LCD Digital Microscope
|
307 | 1,689 |
|
|||
|
Troubleshooting Audio Equipment
Technical discussion on audio equipment troubleshooting and installation. This can be anything from a home/car stereo, guitar amp, and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 2,343
Posts: 27,607
|
2,343 | 27,607 |
|
|||
|
Troubleshooting Appliances and other Household Electronic Stuff
Technical discussion on household appliances & other household electrics & electronics; including troubleshooting and installation. This can be anything from a washer/dryer, dishwasher, microwave oven, other sordid kitchen electrics and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 227
Posts: 3,940
Last Post:
Xiaomi Roidmi EVE Pro battery died!
|
227 | 3,940 |
|
|||
|
Troubleshooting Game Consoles & Other Weird Devices
This can be anything from game consoles to arcade games to anything else that doesn't really fit into any of the above categories. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 1,022
Posts: 10,973
Last Post:
Steelshock 4 v2 controller
|
1,022 | 10,973 |
|
|||
|
Equipment Usage, Soldering, Techniques, and Reviews
Technical discussions concerning soldering techniques, usage of test equipment, how it works, what's best, and some pointers in using it all.
Topics: 1,382
Posts: 19,499
|
1,382 | 19,499 |
|
|||
-
Yesterday, 08:27 PM
-
I have a 5W lamp on 12Volts battery, I want it to be half as bright, so I will add a resistor. What resistor should I supply?
A = W = 5 = 0.416mA
_ _
V 12
R = V = 12 = 28.84 Ohms (R) this is resistance of lamp
_ _____
I 0.416
So I will add one resistor 28.84 Ohms
I will have 28.84 + 28.84 = 57.6 Ohms
Or 28.84 + 28.84 = 14.42 Ohms
I don't know if it will work in series or in parallel
voltage would be 6V and amp current mA = 0.208mA We divide everything by two
W= V * I...Today, 01:58 AM -
Dell Latitude 5590 ST FH1MNQ2
DDM80 LA-F411P REV 1
pwb mp3pg rev A00
Can you help me?
Thx...05-20-2024, 04:37 AM -
I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm
And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,...06-02-2024, 07:31 PM -
I need asus zenbook bios motherboard is UX562UG
R2.1
here is my old bios...Today, 12:48 AM -
Hello I have changed the Main board of a vestel tv with same board but colors are inverted can someone explain me why?...Today, 02:39 AM
-
Is there a way to find out who owns the original email on a macbook air M1 locked with icloud?06-02-2024, 09:18 AM
-
Tv powers on and has backlights but no picture.All voltages from power supply to main board are correct.06-02-2024, 09:45 PM
-
Acer One 10 / N15P2 / S1002, MB=T10IBT1_MB_V30_0508C
found in the trashbin
initial state: Windows 10 loading until begin photo + time display, touchscreen/keyboard/trackpad no response, restart in recovery by F2 key showed a working kb and touchscreen
second state: after a card wash in warm water, drying with heat gun but forgot to remove bottom plastic foil glued on it, fed power, no sign of life apart power led and charge led lit still, after found slight moisture under that foil (grrrr, sgrunt), no more power 1,8v on the bios flash, rarely found 1,8v on the cap...06-01-2024, 01:59 PM -
I have two of these microscopes, both take power and the lights for the specimen bed light up but there is not signs of life on the screen, I have checked the power button for the screen and the screen is getting power.
I need help identifying some SMD components on the board
For the first one has a model number of 44348 there is a three legged component (transistor/mosfet) with the marking N011V (Q4 AND Q5 in picture)
The board has several numbers on it but they do not show any meaningful results on Google and I can't seem to find schematics for either of the boards (they...Today, 03:18 AM
-
I have a 5W lamp on 12Volts battery, I want it to be half as bright, so I will add a resistor. What resistor should I supply?
A = W = 5 = 0.416mA
_ _
V 12
R = V = 12 = 28.84 Ohms (R) this is resistance of lamp
_ _____
I 0.416
So I will add one resistor 28.84 Ohms
I will have 28.84 + 28.84 = 57.6 Ohms
Or 28.84 + 28.84 = 14.42 Ohms
I don't know if it will work in series or in parallel
voltage would be 6V and amp current mA = 0.208mA We divide everything by two
W= V * I...Today, 01:58 AM -
Hello I have changed the Main board of a vestel tv with same board but colors are inverted can someone explain me why?...Today, 02:39 AM
-
I need asus zenbook bios motherboard is UX562UG
R2.1
here is my old bios...Today, 12:48 AM -
I have two of these microscopes, both take power and the lights for the specimen bed light up but there is not signs of life on the screen, I have checked the power button for the screen and the screen is getting power.
I need help identifying some SMD components on the board
For the first one has a model number of 44348 there is a three legged component (transistor/mosfet) with the marking N011V (Q4 AND Q5 in picture)
The board has several numbers on it but they do not show any meaningful results on Google and I can't seem to find schematics for either of the boards (they...Today, 03:18 AM -
HI
I have a HP 15s-eq1096AU with a failed bios
I found a HP exe that allowed me to pull the bin and i entered my key in @8000-8030 & serial @00-FF
This booted to a screen saying clearing bios block 0-630 then restarted to blinking caplocks key reporting broken bios again
If anyone could make me a bios with the DMA info etc from this dump that would be greatly appreciated...Yesterday, 11:39 PM -
I get backlights that stay on not there is no image. The tv does not automatically power on when plugged in either which I generally see happen when there is a fault. It responds as it should to the power button.
I checked the test points on the TCON and I have proper voltages except for at 1P15V. I don't know if that is supposed to be 15V or 5V, but either way I only get 1.134V on that point. I have 12V, 8V, VCC, and a small amount on the CKV point.
I tried heating up the SoC on the main board but that made no difference. Disconnecting either ribbon from the TCON also...06-01-2024, 08:55 PM -
Guys I have set top box which has no power on in specific case. When I insert antenna plug which has 12V on it because of dB gain device on top of antenna, device if its turned off, it will not turn on.
After I need to open the case and short + and - on ABS10 chip and after that device will turn on, without antenna plugged in, after its turned on I can plug in antenna and it will work fine, but I notice there is some extra heat inside the unit.
Is this chip okay? Rectifier bridge ABS10 JQC I don't think there should be connection like additional diode between plus and minus...06-02-2024, 03:09 AM -
Hey everyone, I have an LG 65uq7050zud with a black picture but backlight is on. I tested the measurements from the PSU and they check out. I can’t find any service manual so I’m suspecting the main board. Any advice before I replace the board? Found them for around $60...06-02-2024, 12:10 PM
-
I have Asus Z170 Pro Gaming motherboard, it's working fine apart from the reset and shutdown commands. It doesn't restart when exit the bios or choose to restart in the operating system. Shut down also doesn't work, everything works normally until the moment it should turn off. The only way to turn off is by keep pressing power button for a few seconds. What could it be? This would be my first motherboard repairToday, 12:57 AM
-
The HILTI CPC battery flashes green but no tool starts or works. when testing the battery has 19.2v what could be the problem with them because I have three similar ones but there is nothing written on them all the patches are removed in the first B22 /4.0 with 19.2v the second one B22 /5.2 with 21.8v the third B22 /4.0 with18.3v are all three destroyed ? a bit difficult to believe have also tried other Hilti tools the same thing if someone who can help very grateful...Yesterday, 08:05 AM