Just finished repairing a few faults on a Raiden II board (I've repaired many hundreds if not thousands of old arcade boards over the years). The Raiden II has been a bit of a pain for various reasons, including a lack of schematics, but now I find that it's not saving the high score table after a power cycle even though I've added a suitable 3.6v lithium battery.
Am I missing something obvious?
Does anyone happen to know which chip the battery is backing up with the high score data?
Thanks
Raiden II - high score saving?
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PC Engine Fan X!
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On the Japanese Raiden II PCB Operator's Manual, it mentions something about the 3.6v lithium battery. Since it's entirely in Japanese, I can't read nor understand what it is talking about. Perhaps one of our fellow shmuppers fluent in Japanese can give us a hand on that particular issue. ^_~
I do recall back in 1995-1997, I saw some Raiden II dedicated cabinets that saved high scores upon being powered down for the night. And I've seen some other Raiden II cabinets that did not save high scores whatsoever. Depends on if they were endowed with the necessary 3.6v lithium battery and the proper hardware to accomodate it.
It really is an intriguing issue that Seibu Kaihatsu would allow some of it's Raiden II PCBs to have high score saving whereas on other Raiden II PCBs, that's not the case since there's no back-up battery installed in the first place.
I do have such a Raiden II PCB with the original factory installed 3.6v lithium battery, however, it does not save high scores upon powering it down for the day but it still is playable as usual.
PC Engine Fan X! ^_~
I do recall back in 1995-1997, I saw some Raiden II dedicated cabinets that saved high scores upon being powered down for the night. And I've seen some other Raiden II cabinets that did not save high scores whatsoever. Depends on if they were endowed with the necessary 3.6v lithium battery and the proper hardware to accomodate it.
It really is an intriguing issue that Seibu Kaihatsu would allow some of it's Raiden II PCBs to have high score saving whereas on other Raiden II PCBs, that's not the case since there's no back-up battery installed in the first place.
I do have such a Raiden II PCB with the original factory installed 3.6v lithium battery, however, it does not save high scores upon powering it down for the day but it still is playable as usual.
PC Engine Fan X! ^_~
Fascinating reply, most helpful, many thanks. 
So, can anyone here read Japanese? Any chance you could scan the relevant page from the manual please and upload it?
The board I have didn't have a battery (I assume it had been removed as it does have the two pronged connector which the battery plugs into - would seem a bit mad to fit that connector if it wasn't meant to use a battery).
I notice there's a couple of diodes missing near the battery (there are still two other diodes present, and some resistors and caps) but on looking at pictures of Raiden 2 boards with the battery in place these diodes are missing on them too, so I guess they're not needed.
There's also some jumper pads on the PCB near the battery (JP081 and JP082).
So, can anyone here read Japanese? Any chance you could scan the relevant page from the manual please and upload it?
The board I have didn't have a battery (I assume it had been removed as it does have the two pronged connector which the battery plugs into - would seem a bit mad to fit that connector if it wasn't meant to use a battery).
I notice there's a couple of diodes missing near the battery (there are still two other diodes present, and some resistors and caps) but on looking at pictures of Raiden 2 boards with the battery in place these diodes are missing on them too, so I guess they're not needed.
There's also some jumper pads on the PCB near the battery (JP081 and JP082).