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NEC — PC Engine CoreGrafx

NEC PC Engine CoreGrafx Recap, 7805 & Jailbar Fix

December 15, 20251 thread~1 min read
Jailbars
RecapVoltage-regulator swap

A quick pre-dinner recap on this NEC PC Engine CoreGrafx, plus the standard 7805 voltage regulator replacement and jailbar fix caps thrown in for good measure. Short job.

Parts & Tools (3)

Turbo Everdrive Pro

Turbo Everdrive Pro by Krikzz, the PC Engine flashcart used to load games for testing.

EDFX

EDFX by Krikzz, a plug-and-play RGB AV adapter for the PC Engine and TurboGrafx that taps RGB from the console's rear expansion port (no mod needed), used here with a Mega Drive 2 RGB cable to feed the test display.

Jailbar fix capacitors

0805 4.7uF 16V X7R MLCCs fitted at C135 and C121 for the jailbar fix, per the Console5 wiki.

hitmanmcc
hitmanmcc

December 15, 2025· Thread 1· 2 tweets

View on X ↗View on Bluesky ↗

Took some time before dinner to quickly knock off the Core Grafx's maintenance. Cleaning off the dust bunnies, replacing the capacitors, the voltage regulator and applying the caps for the jailbar fix. #retrogaming #pcengine

2 / 2

Testing with some Rondo of Blood and Winds of Thunder. #Castlevania

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