Yamaha TG77 Installation Manual Download Page 1

Page: 1 / 20

Yamaha TG77 LCD Replacement Guide

produced by: glitchscience.com

2011©

2022©

Yamaha TG77

Replacement Display

Install Guide

glitchscience.com

Replacement TG77 LCDs can be purchased via E-bay

Summary of Contents for TG77

Page 1: ...TG77 LCD Replacement Guide produced by glitchscience com 2022 1 Yamaha TG77 Replacement Display Install Guide glitchscience com Replacement TG77 LCDs can be purchased via E bay glitchscience items on...

Page 2: ...t Resistor and Potentiometer p 6 8 Installing LCD Power Connector p 9 13 Front Panel Removal p 14 16 LCD Panel Removal LCD Installation p 17 18 Finishing the Installation p 19 Read this entire documen...

Page 3: ...ing equipment I recommend using a good quality solder sucker A good quality solder sucker will simplify the process of desoldering components Below are some affiliate links to a couple that can be pur...

Page 4: ...p sides and back of the case Remove the 2 screws from the top front the locations are shown above in Fig 0 Remove two screws from both sides the locations are shown in Fig 1 on page 5 Remove three scr...

Page 5: ...Yamaha TG77 LCD Replacement Guide produced by glitchscience com 2022 5 Fig 1 Side Case Screw Locations Circled in Red Fig 2 Back of the Case Screw Locations Circled in Red...

Page 6: ...esistor labeled R476 and the contrast potentiometer labeled VR301 CONTRAST VOL need to be removed and replaced These parts are both located in the upper right corner as shown in the photo above Fig 3...

Page 7: ...Yamaha TG77 LCD Replacement Guide produced by glitchscience com 2022 7 Fig 4 Inside Circuit Board Screw Locations Circled in Red Fig 5 Backside Circuit Board Screw Location Circled in Red...

Page 8: ...VOL replaced with provided 10K potentiometer Step 2 Desolder R476 from the circuit board and solder the provided 3 3K Ohm resistor in its place Desolder VR301 CONTRAST VOL from the circuit board and...

Page 9: ...cuit board needs to be desoldered and replaced with the white 2 pin connector part that is provided with the replacement LCD In order to desolder CN605 the power supply circuit board needs to be remov...

Page 10: ...Yamaha TG77 LCD Replacement Guide produced by glitchscience com 2022 10 Fig 8 Metal Box Covering the Inverter Circuit Board Fig 9 Metal Box Screw Locations Circled in Red...

Page 11: ...replacement LCD The 2 pin connector that was unplugged from the inverter is connected to the power supply board and labeled CN605 As stated CN605 needs to be desoldered from the power supply board Re...

Page 12: ...aha TG77 LCD Replacement Guide produced by glitchscience com 2022 12 Fig 11 Locations of Screws on Power Supply Board Circled in Red Fig 12 CN605 2 pin Wired Connector needs to be Desoldered and Remov...

Page 13: ...s desoldered and removed the included white 2 pin connector needs to be soldered in its place as shown in Fig 13 above Be sure to correctly orient the connector as shown with the slots facing the edge...

Page 14: ...ortion can be easily pulled off from the front The bottom portion needs to be pushed from the back in order to be pulled off from the front The Data Entry knob can also be easily pulled off from the f...

Page 15: ...Yamaha TG77 LCD Replacement Guide produced by glitchscience com 2022 15 Fig 15 Top Front Panel Screw Locations Circled in Red Fig 16 Side Front Panel Screw Location Circled in Red...

Page 16: ...LCD Replacement Guide produced by glitchscience com 2022 16 Fig 17 Inside Front Panel Screw Location Circled in Red 2of 3 Screws Shown Fig 18 Inside Front Panel Screw Location Circled in Red Remaining...

Page 17: ...readed through the case openings so you can later properly thread the wiring of the new replacement LCD Once the LCD front panel is removed from the case you will find the LCD is attached to it with 4...

Page 18: ...Yamaha TG77 LCD Replacement Guide produced by glitchscience com 2022 18 Fig 20 LCD Ribbon Cable Connection shown in Red Fig 21 LCD Screw Locations shown in Red...

Page 19: ...g up the installation Now that the new LCD is installed before screwing the case back together it would be a good idea to test that your installation of the LCD is working Adjust the LCD contrast knob...

Page 20: ...e com 2022 20 This guide is not to be distributed or redistributed without explicit permission from the owner of the document contact glitchscience at gmail dot com with inquiries Replacement TG77 LCD...