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CC-BY-SA 3.0

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PC ENGINE DUO/TURBO DUO RGB 7374 COMPLETE copy

1 year ago 169
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
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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 copy

PCE RGB FINAL copy

BOM

ID Name Designator Footprint Quantity Mounted
1 SIP1 RO,GO,BO,RAI,LAI,RAO,LAO,C HDR1X1 8 Yes
2 1u C12,C13 C1210 2 Yes
3 Header-Male-2.54_1x1 1VI,5V,GND,GNDI HDR-1X1/2.54 4 Yes
4 1k R14,R15,R16,R1,R7,R4,R5,R6,R19,R18,R20,R21,R3,R8,R9 0603 15 Yes
5 1u C2,C4,C5 C1411 3 Yes
6 THS7374IPW U4 TSSOP-14 1 Yes
7 CTTL JP2 SJ_2S 1 Yes
8 6.98k R2 0603 1 Yes
9 10k R17 0603 1 Yes
10 1u C3,C6,C8,C9,C10 0603 5 Yes
11 CTTL2 JP1 SJ_2S 1 Yes
12 lpfon JP3 SJ_2S 1 Yes
13 si P1 HDR-1X1/2.54 1 Yes
14 Header 1*1P BI,GI,RI HDR-1X1/2.54 3 Yes

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