There are several elements to the battery that need to be correct. Obviously the battery itself must be good and properly connected, then there is the germanium diode which you can test with most DMM's (Digital Multimeter ... not expensive, buy one if you plan to work on your gear), then there is a jumper on the bottom of the board (it can become unsoldered).
You will need to verify the battery voltage right on the RAM ICs with the unit powered off to know if the correct voltage (around 2.5v to 3v) is appearing on the RAM. I wouldn't go by just the built-in battery voltage reading menu.
GB
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On 6/29/2021 7:13 AM, david covino via groups.io wrote:
Good morning, all.? I need your help.? My DX7 is one of those from Japan with the lamp cord power cord.? Recently, I've received this display and figured the battery was bad, so I changed it out, and reloaded the sounds from the cartridge to internal memory.? My problem is that the memory does hold the sounds for more than maybe 10 minutes, and internal memory reads as you see here, and it doesn't emanate any sound.
Strangely, in cartridge mode, all sounds are normal and they work fine.
Has anyone seen this before and have any suggestions?? Battery voltage reads 4.6 volts with a new battery.? (As I recall, these models normally read more than the 3.3 volts for the CR2032)
Thanks very much in advance!
Kind regards,
L. David Covino
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-----Original Message-----
From: David Covino <ldcbox@...>
To: ldcovino@... <ldcovino@...>
Sent: Tue, Jun 29, 2021 10:02 am
Subject: Fwd: kB
-----Original Message-----
From: DAVID COVINO <ldcbox@...>
To: ldcbox@...
Sent: Tue, Jun 29, 2021 9:58 am
Subject: kB
