Скачать или смотреть Roland R-8 - Installing the display to the target R-8 - Restoration Part 4

Installing the donor Roland R-8 display into the target machine leads to an unexpected result.

Basically the donor display displays the same issue in the target machine as the target machine's display.

This has resulted in me comparing the main board from the target and donor machines. Following the comparison I have decided to change the direction of the project.

Background

The Roland R-8 was acquired as a job lot with another instrument. I am a sucker for a drum machine, so the acquisition of this Roland R-8 was a bonus. The second bonus was that when I opened the box containing the Roland R-8 I also found a Roland R-5. But the R-5 will be the subject of another video series.

On acquisition I noticed that the screen on the R-8 was not displaying the characters correctly. After a bit of Googling and reviewing a number of the forums it appeared that R-8's having defective screens was a known issue and would require the screen to be replaced to fix the problem.

This created a problem in itself. Most instruments of this era were supplied with an LCD screen and back light combination. And there are after market screens based on OLED technology that, with a few changes, can be fitted to the instrument. This is not the case for the Roland R-8. This LCD screen made by Samsung has a custom display and is no longer manufactured. There is no OLED equivalent that replicates this custom display.

Once I started to strip the drum machine down I found that there was additional work required to bring this instrument back into use within my studio.

The equipment mentioned above (if you can still buy it!):
Roland R-8 (Used): https://themusictechguyuk.me/3ewF3ZE

Tools and spares used to make this video:
Stanley Ratchet Screwdriver : https://themusictechguyuk.me/3m4eMFQ
Bosch Screw Driver Bits: https://themusictechguyuk.me/2WcZR3l

📖Chapters:
00:00 Introduction
00:17 Removing the display from the target Roland R-8
00:57 removing the foil shield from the target Roland R-8
02:04 Target and donor display observations
02:26 Fitting the donor display into target R-8
05:00 Roland R-8 faders
05:35 Channel promotion
05:58 Powering up the target R-8 display
06:16 Analysis of what I am seeing
06:47 Comparing the target and donor main boards
09:19 Change of plan
11:47 Donor main board with target display test
12:12 New plan and way forward

#rolandr8 #RolandR8DrumMachine #r8 #Roland #drummachine

Videos in this series:
Part 1:    • Roland R-8 - Assessment of the project - R...  
Part 2:    • Roland R-8 - Accessing the drum machine - ...  
Part 3:    • Roland R-8 - Removing the display from the...  
Part 4:    • Roland R-8 - Installing the display to the...  
Part 5:    • Roland R-8 - Removing the rear plate for r...  
Part 6:    • Roland R-8 - Repainting the Backplate - Re...  
Part 7:    • Roland R-8 - Reassembling the circuits to ...  
Part 8:    • Roland R-8 - Cleaning the top for assembly...  
Part 9:    • Roland R-8 - At last the final assembly - ...  

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Roland R-8 - Installing the display to the target R-8 - Restoration Part 4 - 2025-06-28