Nintendo NES-001

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Long Term Reliability

The NES has gotten a bit of a bad rap regarding its reliability, perhaps deservedly so. The good news is that bringing it back to original working is not too much of a challenge.

Read our guide: Improving NES-001 Reliability


Chip Info


Schematics


Capacitor List (Main PCB)

Purchase these parts as a kit

NES PCB

Main NES PCB

C1	100uF	6.3V
C9	2.2uF	50V
C23	1uF	50V


Capacitor List (Power Supplies)

Alps Power & Modulator PCB (with Discreet Diodes)

Alps Power/Mod PCB (Discreet Diodes)
C21	2200uF	25V
C25	100uF	10V
C23	100uF	25v
C29	1uF	50V
C35	1uF	50V
C36	10uF	16v


Alps Power & Modulator PCB (with Discreet Diodes) (Alternate)

Similar to the above PCB but with a slightly different layout and several capacitor orientation changes.

Alps Power/Mod PCB (Discreet Diodes, alternate)
C21	2200uF	25V
C25	100uF	10V
C23	100uF	25v
C29	1uF	50V
C35	1uF	50V
C36	10uF	16v


Alps Power & Modulator PCB (with BA20 Diode Bridge)

Alps Power/Mod PCB (Diode Bridge)
This list is unconfirmed - please verify before removing components
C1	10uF	35v (25v is fine here)
C21	2200uF	25V
C25	100uF	10V
C23	100uF	25v
C29	1uF	50V

Mitsumi Power & Modulator PCB TDK-T12V

Mitsumi Power/Mod PCB TDK-T12V
This list is unconfirmed - please verify before removing components
C2	1uF	50v
C6	1uF	50v
C8	2200uF	25v
C29	100uF	16v
C31	100uF	25v
C32	10uF	16v


Mitsumi Power & Modulator PCB MTM-8V-0

C5	10uF	35v (25v is fine here)
C20	2200uF	25v
C21	100uF	16v
C24	100uF	10v


Mitsumi Power & Modulator PCB TDK-T31V

Mitsumi Power/Mod PCB TDK-T31V
C6	10uF	16v
C21	2200uF	25v
C22	100uF	16v
C25	100uF	10v

Recapping Tip: Power / RF Module

PCB shown after Power / Modulator has been removed

When removing the power module, your first instinct may be to desolder all of the connections on the bottom-side of the NES PCB and withdraw the module, signal pins and all.

The problem with removing the 5 pins along with the modulator is that the PCB traces leading to the pins are only present on the top-side of the NES PCB. Since these pins can be challenging to properly desolder, you may end up removing or dislodging one of the vias. If that happens you may be missing a signal or two upon reinstallation.

Our solution is to remove the top shield on the power module and desolder the 5 pins on the power PCB instead of the NES PCB. Then desolder the ground tabs.

The benefits are:

  1. This leaves the signal pin connection to the NES PCB undisturbed
  2. The signal pin soldering to the NES PCB can be inspected and/or reworked
  3. Signal pin traces on the Power PCB are accessible topside. This makes accidentally pulling out a via a non-issue