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NEC PC Engine

PC Engine Power Connector

Plug Type Coaxial / Barrel Connector
Size 5.5mm Outer Diameter / 2.1mm Inner Diameter
Voltage 9V DC
Amperage 650mA
Polarity Center Negative

Audio/Video Output Connector

PC Engine

The original PC Engine only has a single RF output. This has composite video and left and right audio mixed to mono.

PC Engine CoreGrafx & CoreGrafx II

The second & third edition of the PC Engine was updated with a multi-out.

Pin Signal
1 Composite Video (CVBS)
2 Right Audio
3 Ground
4 +5V
5 Left Audio

Controller Pad Connector Pinout

Pin Name Direction Function
1 VDD - Power Supply
2 DI0 I Data 0
3 DI1 I Data 1
4 DI2 I Data 2
5 DI3 I Data 3
6 SEL 0 Select
7 CLR 0 Clear
8 GND - Signal Ground

Expansion Bus Interface Pinout

Only the pins relevant to modding have been included here.

  01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
C Right Audio Analog Ground I/O                                     +5V Out Composite Sync Blue Video
B                                             Green Video
A Left Audio +5V Out                                     Analog Ground I/O Composite Video Red Video

PC Engine Capacitor List

Original white PC Engine

Board Revision: PWD-623A

Location Capacitance Voltage
C101 22 16
C102 47 25
C103 47 16
C105 10 16
C108 1 50
C109 1 50
C110 1 50
C111 1 50
C112 1 50
C113 1 50
C114 1 50
C115 1 50
C116 10 16
C117 47 16
C149 10 16

CoreGrafx & CoreGrafx II

Board Revision: PWD-814A

Location Capacitance Voltage
C101 22 25
C102 47 25
C103 47 25
C108 1 50
C109 1 50
C110 1 50
C111 1 50
C112 1 50
C113 1 50
C114 1 50
C115 1 50
C116 10 50
C154 1 50
C155 1 50
C156 1 50
C159 47 25
C160 47 25
C162 470 16
C163 10 50
C201 10 16