Editing Amstrad CPC 464 Capacitor Replacement Guide (section)

== Monitor Capacitor Replacement (Brief Pointers) ==

The CTM-640 / CTM-644 colour monitors and the GT-64 / GT-65 green monitors are the second most-common capacitor-failure site in a CPC 464 setup. Full recap procedures are in the monitor-specific Capacitor Replacement Guides; key points:

* '''Bulk capacitor''' (typically 100 µF/400 V on the GT-64 / 220 µF/400 V on the CTM-640) holds a lethal charge after the monitor is powered off. Discharge before any work.
* '''Secondary side electrolytics''' (multiple 47 µF / 100 µF / 220 µF / 470 µF / 1000 µF at 10&ndash;35 V) provide ripple smoothing on the +5 V, +12 V and CRT cathode supplies. Recap with 105 °C low-ESR equivalents.
* '''X2-class line suppression capacitor''' on the mains input may be a RIFA, which is known to crack and fume after 30+ years. Replace with a modern X2-class cap of equal value.
* '''CRT yoke / flyback drive electrolytics''': replace only if specific yoke fault is suspected. These caps drive the CRT scan and replacement requires monitor re-alignment afterward.