The Roland JD-800 is a virtual analog synthesizer produced from 1991 to 1996. Like the D-50, it uses Linear Arithmetic synthesis, which combines samples with digital synthesis. There are 108 built-in waveforms, with the ability to expand this with cards. This is a JD-800 I acquired that was in sad shape - it was suffering greatly from the "red glue of death" - a common problem with Roland synths of the time. This epoxy failure causes sticky, red glue to drip out of the keys and into the synthesizer, gluing keys in place and destroying circuit boards. In this video, I show how I take the synth apart, fix the red glue mess, then do some modifications to the aftertouch and power supply.

Parts:

Silicone Buffer Hose: [ Ссылка ]
Silicone Lubricant Spray: [ Ссылка ]
IEC Socket: [ Ссылка ]
Dust-Off: [ Ссылка ]
Sodium Hydroxide: [ Ссылка ]
Replacement Felt: [ Ссылка ]
Totally Awesome Cleaner: [ Ссылка ]
Lithium Grease: [ Ссылка ]
Brake Cleaner Solvent: [ Ссылка ]
Plasti-Dip: [ Ссылка ]

Tools:
Anhydrous Isopropyl Alcohol: [ Ссылка ]
Pro Honda Spray Cleaner: [ Ссылка ]
3M Spray Adhesive: [ Ссылка ]
Vessel JIS Screwdrivers: [ Ссылка ]
Desoldering Pump: [ Ссылка ]
Soldering Station: [ Ссылка ]
DeOxit D5 Contact Cleaner: [ Ссылка ]
DeOxit F5 Fader Cleaner: [ Ссылка ]
Rigol DS1054Z Oscilloscope: [ Ссылка ]
Thermal (infrared) camera: [ Ссылка ]

Microphone Amazon: Rode PodMic [ Ссылка ]
Microphone Thomann: Rode PodMic [ Ссылка ]
Microphone Boom Amazon: Rode PSA-1 [ Ссылка ]
Microphone Boom Thomann: Rode PSA-1 [ Ссылка ]

0:00 Introduction/Overview
1:59 Red Glue of Death
2:50 Initial Disassembly
4:14 Keybed Glue
5:21 Keybed Locking Strips
6:39 Removing Keys
9:24 Removing Rubber Actuators
10:14 Failed Buffers
10:35 Removing Glue From Keys
13:02 Epoxying Weights Into Keys
15:49 Removing & Replacing Buffers
17:43 Cleaning Key Contacts
18:30 Replacing Rubber Actuators
19:57 Reinstalling Key Springs
21:44 Replacing Keys - Problem!
22:36 Buffer Fix
23:42 Replacing Keys & Reassembling Keybed
24:38 Replacing Felt
25:24 Removing Glue From Case
26:00 Removing Circuit Boards
29:03 Cleaning Sliders
31:08 Replacing Switches
33:40 Reinstalling Circuit Boards
34:21 Power Supply Modification
38:09 Aftertouch Modification
38:33 DAC Linearity Check
38:59 Battery Replacement
39:12 Final Reassembly
39:59 Sounds of the JD-800

#Roland #JD800 #Restoration

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