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PC ENGINE DUO/TURBO DUO RGB 7374 COMPLETE

3 years ago 1782
  • Description
  • Documents
  • BOM
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Description

This uses the expansion port, top is towards the black plastic 23x3 output connector.

Found correct values for the pull up resistor and input capacitors online (3.6M and 82nf) however I dont have a resistor divider network on the output to turn 1.6v into the standard 1.4v p-p. Instead I have a resistor divider on the input. Why not turn the 0.8v input to 0.7v ? That made more sense to me but there is possibly something I am missing...

At any rate after ordering and testing if I don't get why I expect ill adjust the output instead.

Documents

PCE SCHEMATIC

PCE RGB FINAL

BOM

ID Name Designator Footprint Quantity BOM_Manufacturer Part
1 Header-Male-2.54_1x1 GND,5V HDR-1X1/2.54 2 Header-Male-2.54_1x1
2 SIP1 GO,C,RO1,BO1 LABLED OVAL SOLDER PAD 120X60 MILL 4 ?
3 SIP1 RAO,LAO HDR1X1 2 ?
4 1uf C13,C12 C1210 2 ?
5 lpfon JP3 SJ_2S 1 ?
6 CTTL2 JP1 SJ_2S 1 ?
7 CTTL JP2 SJ_2S 1 ?
8 3.6m? R18,R21,R20 0603 3 ?
9 1k R4,R7,R5,R6,R19,R3,R8,R9 0603 8 ?
10 10k R17 0603 1 ?
11 6.98k R2 0603 1 ?
12 THS7374IPW U4 TSSOP-14 1 ?
13 220uf C2,C5,C4 C1411 3 ?
14 0.1uf C8,C9,C10,C6 0603 4 ?
15 75 R1,R16,R15,R14 0603 4 ?
16 PCE EXP ADAPTER P2 TURBOGRAFX EXPANSION 1 IDC Box 2X6 2.54MM

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