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Moderated by: Robert

EurAsia : Index PS2 PS2 Cmos Battery Problem
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Author PS2 Cmos Battery Problem
SegaCDSaturn



private

Registered: 2017-09-01
From: United Kingdom
Messages: 11
Status: Offline
 _#36176 posted 2018-10-04 @ 21:17 GMT   
So I though it to be necessary to change the Cmos battery in my Version 3 PS2. And it works (Saves time and date fine) but after changing, CD based games have stopped working. They only work again if I select "Diagnostic Mode" in the PS2 bios options. Then when I reset the PS2 it goes back to not working correctly. DVD based games are fine.

The correct Cmos battery was used (CR2032) and the PS2 is chipped with a Modbo 4 v1.99 with a new laser.

Anyone know what's happened? NOTHING was damaged during battery changing as it reads fine when in Diagnostic Mode. The top half of the PS2 where the disc drive is was never even touched.

Thanks

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modrobert



donor

Registered: 2003-10-17
From: Bangkok
Messages: 6459
Status: Online
 _#36182 posted 2018-10-05 @ 10:08 GMT   
As far as I know the battery in PS2 is only for the RTC (Real Time Clock), the drive related settings are stored in an EEPROM.
  _____________________________ ____________     __________________ /\________
  \    __________________      \      _____/____/     _    \       /_        /
 /     /       |       l/     _/    ____)     _/      _     \     \/  cREAM /
/______________l_______/       \______________\_______|      \_   /________/
 -+--Mo!-------------- \________/ ------------------- l_______/_____\ -----+-

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SegaCDSaturn



private

Registered: 2017-09-01
From: United Kingdom
Messages: 11
Status: Offline
 _#36183 posted 2018-10-05 @ 17:59 GMT   
Hm, strange. Maybe in earlier PS2s some drive information was stored on the cmos battery? Doesn't seem likely though.

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modrobert



donor

Registered: 2003-10-17
From: Bangkok
Messages: 6459
Status: Online
 _#36185 posted 2018-10-06 @ 04:41 GMT   
What PS2 model number is it?
  _____________________________ ____________     __________________ /\________
  \    __________________      \      _____/____/     _    \       /_        /
 /     /       |       l/     _/    ____)     _/      _     \     \/  cREAM /
/______________l_______/       \______________\_______|      \_   /________/
 -+--Mo!-------------- \________/ ------------------- l_______/_____\ -----+-

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SegaCDSaturn



private

Registered: 2017-09-01
From: United Kingdom
Messages: 11
Status: Offline
 _#36186 posted 2018-10-06 @ 12:32 GMT   
SCPH-30003
GH-07 Motherboard

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SegaCDSaturn



private

Registered: 2017-09-01
From: United Kingdom
Messages: 11
Status: Offline
 _#36198 posted 2018-10-14 @ 23:25 GMT   
Update on supposed "Cmos Battery Problem"

I got another Version 3 to test my theory of CD information being stored on the Cmos. I changed the battery on the new Version 3 and no issues were had afterwards so that isn't the case.

I inspected EVERY circuit board in the PS2 and checked every fuse, all fine even the BA5810FP IC was fine. At this point I'm confused as hell. As a last resort before giving up I replaced the two ribbon cables (The big silver one to the drive board and the small orange one to the laser from the drive board) the silver one made no difference but when I replaced the laser one, it started working again!

The laser ribbon looked fine physically but when testing continuity with the pins, the end pin had no connection. I must of damaged it while changing laser which is odd as it was working fine at first and only went bad after when changing the Cmos (Even though I didn't even touch the Disc drive while doing so)

In conclusion, the Cmos battery doesn't save CD laser data.

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modrobert



donor

Registered: 2003-10-17
From: Bangkok
Messages: 6459
Status: Online
 _#36199 posted 2018-10-15 @ 05:37 GMT   
Good, you fixed it! Happy ending repair. Sometimes the process of elimination is the only way.
  _____________________________ ____________     __________________ /\________
  \    __________________      \      _____/____/     _    \       /_        /
 /     /       |       l/     _/    ____)     _/      _     \     \/  cREAM /
/______________l_______/       \______________\_______|      \_   /________/
 -+--Mo!-------------- \________/ ------------------- l_______/_____\ -----+-

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