ID-5001 LED Backlighting Conversion

Version 2 with Ultra Bright White LEDs

 

Figure 1. Schematics (click for full-size image)

Backlight Conversion Schematic Version 2

Figure 2. LED Circuit Board Layout (click for full-size image)

LED Circuit Board Layout

 

Figure 3. Power Supply Board Modifications

Original Power Supply (1987)

Power Supply Board showing modifications

 

Updated Power Supply (1989)

Power Supply Board showing modifications

Parts

Radio Shack

Part number Description Quantity Unit Price*
276-1778 LM-317T Voltage Regulator 1 $1.99
276-1396A Prepunched Perfboard (6” x 8”) 1 $3.49
276-0688 Two 5-Lug Solder Terminals (package of 4) 1 $1.29
640-2361 Package of Permamount Tape 1 $1.99
276-1141 3-Amp Rectifiers (package of 2) 1 $0.99
272-1047 1000 mfd 50WVDC Electroytic Capacitor 1 $3.59
  47-Ohm 1/2W Resistor  1 $0.79
  15-Ohm 1/2W Resistor 1 $0.79
272-0135 0.1 mfd Capacitors (package of 2) 1 $0.69
640-3052 Tap-in Squeeze Connectors (package of 10) 1 $1.69
  20 AWG Wire 24"  
  24 AWG Wire 24"  

LEDs

TheLEDLight.com

Part number Description Quantity Unit Price*
T1 3/4-20W 5,600 mcd White LED 6 $2.90

-- or --

BGMicro.com

Part number Description Quantity Unit Price*
LED1044 5,600 mcd White LED 6 $2.95

Click the "Shop Online" tab and enter "LED1044" in Search Keyword field.

-- or --

Alltronics.com

Part number Description Quantity Unit Price*
SE5084J 5,600 mcd White Jumbo High Brite LED 6 $4.95

Click "Search Our Site" and enter "SE5084J".

 

* Prices may vary.

Assembly Instructions

Disassembly

  1. Disconnect ID-5001 from 120VAC.
  2. Remove main cover and lamp cover.
  3. Remove the main circuit and power supply boards.
  4. Cut the two traces that supply power to the fluorescent lamp (see Figure 3).
  5. Remove fluorescent lamp and lamp sockets.
  6. Reinstall the power supply and main circuit boards.

LED Circuit Board (refer to Figure 2)

  1. Cut perfboard to 1" by 8".
  2. Install LM-317 constant current regulator, resistors, capacitors, and diodes as shown.
  3. Mount LEDs 1" apart on the board, flat-side to the left, long lead to the right.
  4. Line lamp enclosure with highly reflective and non-conductive material such as engineering-grade reflective vinyl.
  5. Install LED circuit board on the removable light panel using permamount tape - BE SURE ALL WIRES ON THE BACK SIDE OF THE BOARD ARE COVERED WITH ELECTRICAL TAPE BEFORE MOUNTING IT.
  6. Aim LEDs downward to reflect off of the bottom lamp enclosure.
  7. Connect (A) to green/yellow wire of power transformer.
  8. Connect (B) and (C) to green wires of power transformer.

Disclaimers

Thunderhead Technologies assumes no responsibly for the accuracy of the ID-5001 LED Backlighting Conversion, availability of its parts, its fitness for any purpose, or any damages - direct or inconsequential - to persons or property.

The ID-5001 LED Backlighting Conversion is intended for individuals experienced in electronics assembly. Consult a qualified professional if you are unsure of your ability to perform the required steps. Always follow safe practices while working with electronics including wearing an anti-static wrist strap to avoid damage to any electronic component.

Use of any vendors' parts does not constitute an endorsement of that vendor.

 

Contact Information

For questions about the ID-5001 LED Backlighting Conversion, contact Ron Spatafora.

Last updated: November 5, 2001