Editing Amstrad GX4000 Capacitor Replacement Guide (section)

== Where they are ==

The RGB converter schematic places several of these parts in the television outputs. C102, C103 and C104 (470&nbsp;µF) are in series with the red, green and blue outputs of the CXA1145P encoder (IC101) to the Peritel socket, and C121 (470&nbsp;µF) is in the composite output to the same socket. C113 to C116 (22&nbsp;µF) are on the red, green, blue and sound lines at the encoder.<ref name="smgx" /> A failed coupling capacitor in the Peritel outputs shows as one weak or missing colour on a television; the monitor DIN socket does not use them. See [[Capacitor Failure Symptoms]].

[[File:Amstrad GX4000 main board.jpg|thumb|center|600px|An MC0123C board. C102, C103 and C104 are beside the sound switch SW101 next to the RF modulator, C121 is below the Peritel socket, and C182 is beside the DC sockets at top right.]]

The board in the photograph is revision MC0123C (2700-017P-4); the manual draws MC0123A (2700-017P-3).<ref name="smgx" /><ref name="mbphoto">Evan-Amos, [https://commons.wikimedia.org/wiki/File:Amstrad-GX4000-Motherboard-Flat-Top.jpg "Amstrad-GX4000-Motherboard-Flat-Top.jpg"], Wikimedia Commons, 2017 (public domain). Retrieved 2026-10-02. Board markings MC0123C and 2700-017P-4, the positions of C102, C103, C104, C121 and C182, the fitted C109 and the empty C185 position.</ref>