Apple 076-8119 Power Transformer AppleColor Monitor 100 YEK UT-5505 CRT

Apple 076-8119 Power Transformer AppleColor Monitor 100 YEK UT-5505 CRT

The Apple 076-8119 is the original OEM power transformer for the AppleColor Monitor 100, Apple's early color CRT display designed for use with the Apple II series and early Macintosh-era systems. The transformer is manufactured by YEK (model UT-5505) and steps down AC mains voltage to supply the monitor's internal circuitry. It features a laminated steel core construction, gold-colored chassis mounting tabs, and a flying-lead harness with a keyed connector for direct board connection.

Specifications & What's Included

• Apple Part Number: 076-8119
• Transformer Manufacturer / Model: YEK UT-5505
• Internal Part Number (printed on unit): 2809-245-0103
• Additional marking on unit: EM 22 PY
• Type: Chassis-mount power transformer, open-frame laminated core
• Compatible with: Apple AppleColor Monitor 100 CRT
• Lead configuration: Flying leads with keyed multi-pin connector harness (red, black, and white leads visible)
• Mounting: Bracket/tab mount with gold-colored steel mounting ears
• Includes: Original white cardboard box (opened, storage wear)

Applications

The AppleColor Monitor 100 was Apple's first color RGB monitor, introduced in the mid-1980s to accompany the Apple IIe and Apple IIc systems. It was a composite and RGB CRT display that brought color output to Apple's home and educational computing line. Replacement power transformers for this monitor are a rare find today, as the AppleColor 100 has a dedicated collector and vintage computing restoration community. This transformer is the correct OEM Apple-sourced part for anyone repairing or restoring an AppleColor Monitor 100. CRT monitors of this era relied on a dedicated step-down power transformer to supply regulated voltages to the deflection, video, and high-voltage boards — making this part essential for a complete restoration.