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 Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102088
10/19/15 04:05 PM
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Joined: Mar 2008
Posts: 1,044
Shideravan
Very Senior Member
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Very Senior Member
Joined: Mar 2008
Posts: 1,044 |
Awesome! 
"A user interface is like a joke. If you have to explain it, it's not that good."
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102089
10/19/15 04:49 PM
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Joined: Mar 2006
Posts: 1,042
Lord Nightmare
Very Senior Member
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Very Senior Member
Joined: Mar 2006
Posts: 1,042 |
PlgDavid: can you ask slydc to flip the pcb over in this pic: http://1.bp.blogspot.com/-S0V0h08qeQ8/ViRDlpe0uPI/AAAAAAAAASc/NLHVDKUgaCw/s1600/battle%2Bvader.jpg and take a picture of the back?
The 'two missile pins' and 'two start pins' thing is confusing. Are they shorted together when the button is pushed?
LN
"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102092
10/19/15 05:13 PM
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Joined: Aug 2009
Posts: 191
plgDavid
OP
Senior Member
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OP
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Joined: Aug 2009
Posts: 191 |
No need here are scans of mine (after removing the chip)  
Last edited by plgDavid; 10/19/15 05:14 PM.
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102094
10/19/15 05:17 PM
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Joined: Aug 2009
Posts: 191
plgDavid
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Senior Member
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OP
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Joined: Aug 2009
Posts: 191 |
And the Cassette Vision JR PCB scan  
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102095
10/19/15 05:19 PM
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Joined: Aug 2009
Posts: 191
plgDavid
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OP
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Posts: 191 |
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102100
10/19/15 07:32 PM
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Joined: Mar 2006
Posts: 1,042
Lord Nightmare
Very Senior Member
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Very Senior Member
Joined: Mar 2006
Posts: 1,042 |
On the cartridge:
capacitor C01, I see one leg connects to upd pin 18; where does the other leg go?
Also what are the markings on capacitors C01 thru C04?
Also is resistor R02 5.6K or 5.7K? the stripe is poorly visible.
Also are there any markings on R04 to show what value/type of resistor pack it is?
LN
Last edited by Lord Nightmare; 10/19/15 07:34 PM. Reason: add question about R04
"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102102
10/19/15 08:29 PM
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Joined: Mar 2006
Posts: 1,042
Lord Nightmare
Very Senior Member
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Very Senior Member
Joined: Mar 2006
Posts: 1,042 |
"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102103
10/19/15 09:47 PM
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Joined: Aug 2009
Posts: 191
plgDavid
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Senior Member
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OP
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Joined: Aug 2009
Posts: 191 |
C01 1uF 50v (neg terminal goes to ground)
C02 10uF 16v
C03 1200pF (122)
C04 47nF (473)
R02 is green brown red gold (hence 5.1k Ohms 5%)
R04 7X682M
Last edited by plgDavid; 10/19/15 09:48 PM. Reason: typo
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Re: Epoch Cassette Vision and uPD77X chips
[Re: plgDavid]
#102105
10/19/15 11:31 PM
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Joined: Mar 2006
Posts: 1,042
Lord Nightmare
Very Senior Member
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Very Senior Member
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Posts: 1,042 |
"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
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