PC Engine ROM2AMP (AMP-30) Capacitor map

[Ptolomey I]

Hi,

I recently got a PC Engine ROM2AMP accessory as I have seen it produces a nice sound, and I like the design a lot!

I am preventively replacing the caps, so I have created a capacitor chart.

It is based on the image uploaded by user thearthur777 on reddit ( https://www.reddit.com/r/TurboGrafx/comments/1e8uclk/pc_engine_amp30_capacitor_replacement_chart/ )
There is a discrepancy on one capacitor between their capacitor list and my unit.

Maybe my board is a different revision, but given the low sales of this accessory I doubt that there's more than one revision. So, I think the best would be for everyone to verify all their cap values before any de-soldering.

Capacitor map and table:

Item	Capacitance (uF)	Voltage (V)
C103	2,2	50
C104	2,2	50
C107	0,33	50
C108	0,33	50
C109	47	50
C110	47	50
C111	100	10
C112	100	10
C125	22	25
C126	22	25
C201	10	63
C202	100	10
C203	4,7	50
C204	47	10
C205	100	63
C206	1000	35
C301	10	50
C302	10	50
C305	10	50
C306	10	50
C307	22	25
C403	4,7	50
C404	4,7	50
C407	10	50
C409	4,7	50
C411	10	50
C412	4,7	50
C413	10	50
C415	47	25
C416	10	50
C417	10	50
C418	10	50
C501	1	50
C502	10	50
C505	47	10
C506	10	50
C509	4,7	50
C512	10	50
C515	1	50
C601	4700	35
C602	4700	35
C605	220	35
C606	220	35
C607	100	16
C608	100	16
C609	100	10

Then, the usual disclaimer that I am not responsible of any possible negative impact on your console following the information shared.

And finally, if there is any error, please let me know for correction.


Thanks to this forum for the support!

[Ptolomey I]

In addition to the cap map, I want to say that if you have the loudspeakers that came with it and they don't sound good, there's a solution:
If you remove the metal mesh in front (a sharp object through it and some gentle leverage might do the trick) you will discover 4 screws that hold the 2 parts of the case together.
Inside, there is a standard 4-inch loudspeaker with a square support plate.
The speaker itself has 8 ohms and rated at 15W max
Space in the case is relatively tight: the loudspeaker is 6cm tall, and I'm not sure if any size bigger than that might fit
In any case it should be easy to find a replacement, de-solder, and re-solder the new part

Hope it helps!