Yamaha TG77 Installation Manual
Replacement display
Hide thumbs
Also See for TG77:
- Operating manual (208 pages) ,
- Owner's manual (139 pages) ,
- Reference (74 pages)
Related Manuals for Yamaha TG77
Summary of Contents for Yamaha TG77
- Page 1 Yamaha TG77 LCD Replacement Guide Yamaha TG77 Replacement Display Install Guide glitchscience.com Replacement TG77 LCDs can be purchased via E-bay glitchscience items on E-bay produced by: glitchscience.com 2022©...
- Page 2 Yamaha TG77 LCD Replacement Guide Yamaha TG77 LCD Replacement Guide Table of Contents Required Tools and Additional Info ..................p. 3 Installation ..........................p.4 - 19 Opening the Case........................ p. 4-5 Replacing Contrast Resistor and Potentiometer ……............p. 6-8 Installing LCD Power Connector..................p. 9-13 Front Panel Removal ......................
- Page 3 Soldering Equipment on Amazon.com or just do a Google search to find what you need. ************************************************** ELECTRICAL SHOCK HAZARD! UNPLUG the TG77 before working on the inside, the voltages inside have the potential to be very dangerous! produced by: glitchscience.com 2022©...
- Page 4 Fig. 0 - Top Case Screw Locations Circled in Red Step 0: You will need to open the TG77. First, be sure to unplug the TG77. Now, to remove the top of the case you will need to remove the screws from the top, sides, and back of the case.
- Page 5 Yamaha TG77 LCD Replacement Guide Fig. 1 - Side Case Screw Locations Circled in Red Fig. 2 - Back of the Case Screw Locations Circled in Red produced by: glitchscience.com 2022©...
- Page 6 Yamaha TG77 LCD Replacement Guide Fig. 3 - Contrast resistor labeled R476 and contrast potentiometer labeled VR301 CONTRAST VOL. Both located in the Upper Right Corner Step 1: Both the contrast resistor labeled R476 and the contrast potentiometer labeled VR301 CONTRAST VOL. need to be removed and replaced.
- Page 7 Yamaha TG77 LCD Replacement Guide Fig. 4 - Inside Circuit Board Screw Locations Circled in Red Fig. 5 - Backside Circuit Board Screw Location Circled in Red produced by: glitchscience.com 2022©...
- Page 8 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 solder the provided 10K potentiometer in its place. Reinstall the circuit board into the TG77 and screw the circuit board back into place. produced by: glitchscience.com...
- Page 9 Yamaha TG77 LCD Replacement Guide Fig. 7 - Location of CN605 which needs to be removed Step 3: In order to power the backlight of the new replacement LCD the wired connector labeled CN605 located on the power supply circuit board needs to be desoldered and replaced with the white 2-pin connector part that is provided with the replacement LCD.
- Page 10 Yamaha TG77 LCD Replacement Guide Fig. 8 - Metal Box Covering the Inverter Circuit Board Fig. 9 - Metal Box Screw Locations Circled in Red produced by: glitchscience.com 2022©...
- Page 11 Yamaha TG77 LCD Replacement Guide Fig. 10 - Metal Box Covering Removed from the Inverter Step 4: Once the metal box is removed, you will find a small inverter circuit board with two wired connections. Unplug both of these connections and remove the inverter circuit board, it is held in place by two screws.
- Page 12 Yamaha TG77 LCD Replacement Guide Fig. 11 - Locations of Screws on Power Supply Board Circled in Red Fig. 12 - CN605 2-pin Wired Connector needs to be Desoldered and Removed produced by: glitchscience.com 2022©...
- Page 13 Yamaha TG77 LCD Replacement Guide Fig. 13 - Included 2-pin Connector soldered into CN605 Position Step 5: Once the CN605 2-pin wired connector is desoldered and removed, the included white 2-pin connector needs to be soldered in its place as shown in Fig.
- Page 14 Yamaha TG77 LCD Replacement Guide Fig. 14 - Knob Locations on Front Panel Shown in Red Step 6: Remove the front panel. In order to remove the front panel you will need to remove the Data Entry knob and the Volume knob. The volume knob consists of two knobs, a top portion and a bottom portion.
- Page 15 Yamaha TG77 LCD Replacement Guide Fig. 15 - Top Front Panel Screw Locations Circled in Red Fig. 16 - Side Front Panel Screw Location Circled in Red produced by: glitchscience.com 2022©...
- Page 16 Yamaha TG77 LCD Replacement Guide 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 Screw Shown produced by: glitchscience.com 2022©...
- Page 17 Yamaha TG77 LCD Replacement Guide Fig. 19 - Screw Locations on LCD Front Panel shown in Red Step 7: Remove the LCD front panel. There are 4 screws that hold the LCD front panel in place as shown in the photo above Fig.
- Page 18 Yamaha TG77 LCD Replacement Guide Fig. 20 - LCD Ribbon Cable Connection shown in Red Fig. 21 - LCD Screw Locations shown in Red produced by: glitchscience.com 2022©...
- Page 19 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 on the back of the TG77 as needed. Once you have verified your LCD installation works, screw everything back together and you are finished.
- Page 20 Yamaha TG77 LCD Replacement Guide 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 LCDs can be purchased via E-bay glitchscience items on E-bay produced by: glitchscience.com...