[Techtoolslist] Assman "Ribbon Cable Tester"

[John Robertson]

The Toshiba TMP47P400VN is a CMOS CPU with onboard RAM/ROM. looks like 
it can be read as a 2764 with appropriate jumpers, etc. Guess I better 
carefully back it up soon!

http://pdf1.alldatasheet.com/datasheet-pdf/view/104802/TOSHIBA/TMP47P400VN.html

John :-#)#

On 2017/11/16 1:33 PM, John Robertson wrote:
> Assman WSW Components used to sell these devices:
>
> https://www.digikey.ca/product-detail/en/assmann-wsw-components/ACT-PC-SO/AE1207-ND/308611 
>
>
> No longer supported (I asked). They have no info on outdated tools.
>
> The CPU is a Toshiba TMP47P400VN whatever that is (digging).
>
> My problem appears to be with the op-amp battery level comparator, 
> either it is defective or the various jumper wires were done 
> incorrectly. My rough drawing caught the error with a jumpered power 
> connection to the LM358 that accounted for the rapid 9V battery drain 
> even when off.
>
> John :-#)#
>
> On 2017/11/16 12:49 PM, Jess Askey wrote:
>> Im trying to figure out where the 'Assman' prefix came from?  I was 
>> expecting some sort of Seinfeld reference. 😊
>>
>> -----Original Message-----
>> From: Techtoolslist [mailto:techtoolslist-bounces at flippers.com] On 
>> Behalf Of John Robertson
>> Sent: Thursday, November 16, 2017 1:08 PM
>> To: techtoolslist at flippers.com
>> Subject: [Techtoolslist] Assman "Ribbon Cable Tester"
>>
>> Anyone else playing with one of these? It is a ribbon cable tester I 
>> found on eBay and you teach it for each cable being tested. It only 
>> remembers the current cable under test. Inside it says "Ribbon B2 
>> Hobbes CO." on the main PCB. Doesn't appear to be any town called 
>> Hobbes in Colorado...(Calvin & Hobbes pops up of course)
>>
>> This device runs off 9VDC wall wart or has a battery which you can 
>> also run it off. My unit drains the battery rather quickly when off 
>> and the wall wart is not plugged in. The 9V battery is not used to 
>> retain memory, that function is covered with a HM6265WH-70 CMOS RAM 
>> which is maintained by a 10Ufd cap that is charged by a diode to the 
>> 5VDC buss.
>> That size cap drained from 4.8VDC to 2.6VDC overnight. If you want to 
>> store longer, then use a bigger cap.
>>
>> The annoying thing about this tester is the 9V battery drainage means 
>> there is always a LOW BATTERY warning on the display. So I have to 
>> sketch out the 9V battery circuit and figure out why there are so 
>> many jumpers installed from the factory for that battery.
>>
>> I have uploaded manual and photos of the outside and inside of the 
>> gizmo in case you are curious to:
>>
>> ftp://ttl.arcadetech.org/TTL/Test_Equipment/Assman
>>
>> We are producing ribbon cables for arcade games and it will be nice 
>> to have this working correctly.
>>
>> John :-#)#
>>
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>

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