Data General Dasher D2

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Data General Dasher D2

Preliminary Information
Release Year	1975
Leak Risk	Medium
Batteries	None
Mounting Technology	Through Hole
Capacitor Types	Aluminum Electrolytic, Tantalum, Ceramic
Destructive Entry	No

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Known Issues

Symptom or Problem Encountered

Causes

• Description of cause

Solutions

• Solution to the problem

Disassembly Notes

The Asynchronus Interface Board has a ribbon cable that requires removing the upper case. The other boards can be slid out by only removing the front panel.

Removing the top cover will expose dangerous high voltage CRT components!

Original Parts

Asynchronus Interface Board

Board Number 10700059602

Drawing Number 005-6760, 005-6759

Revision 08

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
	9	6.8 µF	35 V	Axial Through Hole	4.55 mm	12.25 mm	20.50 mm		Tantalum	Kemet	T314
	11	47 nF		Axial Through Hole	2.30 mm	4.20 mm	11.25 mm		Ceramic	Corning Glass Works
	1	47 µF	6 V	Through Hole	5.00 mm	9.90 mm	2.75 mm		Tantalum

Display Control

Board Number 10700059802

Drawing Number 005-6766, 005-6765

Revision 04

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
	12	6.8 µF	35 V	Axial Through Hole	4.55 mm	10.00 mm	20.50 mm		Tantalum		700
	17	47 nF		Axial Through Hole	2.00 mm	5.80 mm	11.30 mm		Ceramic	ITW - Paktron

Display Memory

Board Number 10700059504

Drawing Number 005007551, 005007550

Revision 11

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
	14	6.8 µF	35 V	Axial Through Hole	4.55 mm	10.00 mm	20.00 mm		Tantalum
	19	47 nF		Axial Through Hole	2.40 mm	4.00 mm	11.30 mm		Ceramic	Corning Glass Works
	1	10 nF		Axial Through Hole	2.65 mm	4.40 mm	11.65 mm		Ceramic	Corning Glass Works
	1	150 pF		Axial Through Hole	2.25 mm	4.40 mm	11.40 mm		Ceramic	Corning Glass Works
	1	820 pF		Axial Through Hole	2.30 mm	5.80 mm	12.20 mm		Ceramic	Corning Glass Works

Display Video

Board Number 1070076501

Drawing Number 4379

Revision 02

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
	14	6.8 µF	35 V	Axial Through Hole	4.57 mm	10.67 mm	20.30 mm	125°C	Tantalum	Kemet	T322
	21	47 nF		Axial Through Hole	2.40 mm	4.40 mm	10.50 mm		Ceramic	Corning Glass Works

Replacement Parts

Asynchronous Interface Board

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
	9	173D685X0035XE3	DigiKey Mouser
	11	C410C473K5R5TA / CT4G-0805-2X1-100V-0.047μF-K	DigiKey Mouser LCSC
	1	TAP476K006CRW / 178MU0043	DigiKey Mouser LCSC

Display Control

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
	12	173D685X0035XE3	DigiKey Mouser
	17	C410C473K5R5TA	DigiKey Mouser

Display Memory

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
	14	173D685X0035XE3	DigiKey Mouser
	19	C410C473K5R5TA	DigiKey Mouser
	1	C410C103M1U5TA7200 / CC1H103ZA1ED3F4D1100	DigiKey Mouser LCSC
	1	C410C151J1G5TA7200 / CC1H151KC1EDB44B1100	DigiKey Mouser LCSC
	1	C410C821K1R5TA / R07B1B821KN0B0S0N0	DigiKey Mouser LCSC

Display Video

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
	14	173D685X0035XE3	DigiKey Mouser
	21	C410C473K5R5TA / CT4G-0805-2X1-100V-0.047μF-K	DigiKey Mouser LCSC

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Kits

• Digikey BOM: https://www.digikey.com/

Related Links

• Videos or other things that might be helpful to check out