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buzzingout2gsocket [2008/01/23 09:44] 76.100.119.159 |
buzzingout2gsocket [2008/01/23 09:47] 76.100.119.159 |
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Check for continuity of the tracks to the EPROM as follows (note that there is a 100 ohm series resistor between EPROM pin 22 and IC2 pin 44): | Check for continuity of the tracks to the EPROM as follows (note that there is a 100 ohm series resistor between EPROM pin 22 and IC2 pin 44): | ||
- | ||EPROM||IC2||IC1||Notes|| | + | ^ EPROM ^ IC2 ^ IC1 ^Notes ^ |
- | ||01||25||63|| | | + | | 01| 25| 63| | |
- | ||02||28||60|| | | + | | 02| 28| 60| | |
- | ||03||34||55|| | | + | | 03| 34| 55| | |
- | ||04||35||54|| | | + | | 04| 35| 54| | |
- | ||05||36||53|| | | + | | 05| 36| 53| | |
- | ||06||37||52|| | | + | | 06| 37| 52| | |
- | ||07||38||51|| | | + | | 07| 38| 51| | |
- | ||08||39||50|| | | + | | 08| 39| 50| | |
- | ||09||40||49|| | | + | | 09| 40| 49| | |
- | ||10||41||48|| | | + | | 10| 41| 48| | |
- | ||11||45||11|| | | + | | 11| 45| 11| | |
- | ||12||46||12|| | | + | | 12| 46| 12| | |
- | ||13||47||13|| | | + | | 13| 47| 13| | |
- | ||14|| || ||GND| | + | | 14| | |GND| |
- | ||15||48||14|| | | + | | 15| 48| 14| | |
- | ||16||49||15|| | | + | | 16| 49| 15| | |
- | ||17||50||16|| | | + | | 17| 50| 16| | |
- | ||18||51||17|| | | + | | 18| 51| 17| | |
- | ||19||52||18|| | | + | | 19| 52| 18| | |
- | ||20|| || ||GND| | + | | 20| | |GND| |
- | ||21||30||58|| | | + | | 21| 30| 58| | |
- | ||22||44|| ||100 ohms| | + | | 22| 44| |100 ohms| |
- | ||23||29||59|| | | + | | 23| 29| 59| | |
- | ||24||31||57|| | | + | | 24| 31| 57| | |
- | ||25||32||56|| | | + | | 25| 32| 56| | |
- | ||26||27||61|| | | + | | 26| 27| 61| | |
- | ||27||26||62|| | | + | | 27| 26| 62| | |
- | ||28|| || ||+5V| | + | | 28| | |+5V| |
Pin numbers for IC1 and IC2 are printed on the PC board. The EPROM pins are numbered as follows: | Pin numbers for IC1 and IC2 are printed on the PC board. The EPROM pins are numbered as follows: | ||
{{http://www.dsmlink.com/images/forums/m27c512.gif}} | {{http://www.dsmlink.com/images/forums/m27c512.gif}} |