Editing Sega CD Service Manual (section)

== What this manual settles ==

* The Model 1 Mega CD has three boards, each with its own parts list, schematic and mount diagram, and each numbers its parts from 1. A designator such as C41 means nothing without the board name.
* Main board ICs: IC1 HD68HC000CP-12; IC2 the Sega custom MCE2, MB634120, part 315-5548; IC3 the custom RF5C164A, part 315-5476A; IC6 MB3790; IC7 and IC8 TC511664BZ-80; IC10 and IC11 TC51832FL-10; IC13 LC8951; IC14 and IC15 MB8464A-80. Sub board: IC1 LC7883KM, IC2 LC7881M-C, IC3 to IC5 µPC844G2.
* Electrolytic capacitors, from the parts lists (pp. 96 and 98):
** Main board: C41 to C50, 10 µF 16 V chip electrolytics (150-0400, or the alternative 150-0400-01); C51 and C52, 100 µF 6.3 V radial (150-0401). C53, C54 and C56 to C58 are not used.
** Sub board: C1 to C14, 10 µF 16 V radial (150-0402); C40 and C42, 100 µF 6.3 V 105 °C (150-0404); C41, 100 µF 6.3 V radial (150-0401); C43, 100 µF 16 V (150-0059). C36 to C39 are not used.
** Connect board: none. Its only capacitors are eighteen 150 pF ceramic chips.
* Unlike the Mega Drive boards, these lists group capacitors by type in consecutive designator runs, and the run of identical electrolytics at C41 to C50 is what Sega's list gives. The part number series still marks the dielectric: 150-xxxx electrolytic, 151-xxxx ceramic.