https://www.cbmstuff.com/forum/ Sat, 11 Apr 2026 08:11:26 +0000 MyBB https://www.cbmstuff.com/forum/showthread.php?tid=1227 Sun, 16 Nov 2025 22:42:17 -0500 Chuck]]> https://www.cbmstuff.com/forum/showthread.php?tid=1227
    Having trouble with a second ICS64 build.  The board keeps failing during the diagnostic sound test (586220 diagnostic cartridge).  It stalls sounding one tone.  All the chips work when placed in the the first build.  The OLED display works fine and I can change to different OS systems loaded in the kernal chip.  Sometimes after turning on the board, without a diagnostic cartridge, the screen hick-ups and freezes with a fast blinking prompt.  The board passes the dead test.
    I'm wondering if I could have cooked some SMD components the backside.  Any suggestions? 

Thanks]]>
    Having trouble with a second ICS64 build.  The board keeps failing during the diagnostic sound test (586220 diagnostic cartridge).  It stalls sounding one tone.  All the chips work when placed in the the first build.  The OLED display works fine and I can change to different OS systems loaded in the kernal chip.  Sometimes after turning on the board, without a diagnostic cartridge, the screen hick-ups and freezes with a fast blinking prompt.  The board passes the dead test.
    I'm wondering if I could have cooked some SMD components the backside.  Any suggestions? 

Thanks]]> https://www.cbmstuff.com/forum/showthread.php?tid=991 Thu, 06 Apr 2023 03:26:16 -0400 pquinton]]> https://www.cbmstuff.com/forum/showthread.php?tid=991
During the voltage tests I've found the User Port voltage measurement is at the max recommended level on Page 89 at 5.25v. Other voltages are within range, it's just this one. Is this okay, or should I be looking somewhere specific for a fault/component issue?

Thanks,
Phil.]]>
During the voltage tests I've found the User Port voltage measurement is at the max recommended level on Page 89 at 5.25v. Other voltages are within range, it's just this one. Is this okay, or should I be looking somewhere specific for a fault/component issue?

Thanks,
Phil.]]> https://www.cbmstuff.com/forum/showthread.php?tid=944 Sun, 06 Nov 2022 08:58:45 -0500 aircraftmech123@gmail.com]]> https://www.cbmstuff.com/forum/showthread.php?tid=944
Thanks,
Byron]]>
Thanks,
Byron]]> https://www.cbmstuff.com/forum/showthread.php?tid=927 Fri, 19 Aug 2022 05:42:58 -0400 aircraftmech123@gmail.com]]> https://www.cbmstuff.com/forum/showthread.php?tid=927
I have tried to include an image to no avail as well. It keeps saying image is larger than 500 kilobytes?

Thanks in Advance,
Byron]]>
I have tried to include an image to no avail as well. It keeps saying image is larger than 500 kilobytes?

Thanks in Advance,
Byron]]> https://www.cbmstuff.com/forum/showthread.php?tid=862 Mon, 18 Oct 2021 18:41:53 -0400 dwestbury]]> https://www.cbmstuff.com/forum/showthread.php?tid=862
I'm nearly done with my ICS64 build and just waiting for a couple more IC sockets to show up in the mail.

While testing, I ran into some issues with the 5v rail, which doesn't seem to be working at all?

I suspected that I might have a problem with the 1A 7805 regulator @ VR2, so I replaced it with a Recom R-78B-1.5, but so far this hasn't made a difference?


Here are the voltages I'm readings at various test points:

TP1 12.38 DC
TP2 9.23 DC
TP3 9.23 DC
TP4 9.34 DC
TP5 GND
TP6 0 (this should be the 5v rail?)
TP7 6.3 AC
TP8 6.14 AC

VIC Pin 40 9.22 DC
SID Pin 28 9.29 DC
RF Mod 12.4 DC


Here are the jumper settings I've selected on the bottom of the board:

JP2 Open (what does this one do?)
JP3 5v (using an 8565 R2 @ 5v)
JP4 24 (will use standard ROM)
JP5 24
JP6 24
JP10 24 (will use standard ROM)
JP11 24
JP12 24
A13 - A15 Open (plan to use Kernal switcher)


  IMG_1961.jpeg (Size: 183.14 KB / Downloads: 6)


  IMG_1960.jpeg (Size: 229.59 KB / Downloads: 7)


Any tips or leads?
Thanks!]]>
I'm nearly done with my ICS64 build and just waiting for a couple more IC sockets to show up in the mail.

While testing, I ran into some issues with the 5v rail, which doesn't seem to be working at all?

I suspected that I might have a problem with the 1A 7805 regulator @ VR2, so I replaced it with a Recom R-78B-1.5, but so far this hasn't made a difference?


Here are the voltages I'm readings at various test points:

TP1 12.38 DC
TP2 9.23 DC
TP3 9.23 DC
TP4 9.34 DC
TP5 GND
TP6 0 (this should be the 5v rail?)
TP7 6.3 AC
TP8 6.14 AC

VIC Pin 40 9.22 DC
SID Pin 28 9.29 DC
RF Mod 12.4 DC


Here are the jumper settings I've selected on the bottom of the board:

JP2 Open (what does this one do?)
JP3 5v (using an 8565 R2 @ 5v)
JP4 24 (will use standard ROM)
JP5 24
JP6 24
JP10 24 (will use standard ROM)
JP11 24
JP12 24
A13 - A15 Open (plan to use Kernal switcher)


  IMG_1961.jpeg (Size: 183.14 KB / Downloads: 6)


  IMG_1960.jpeg (Size: 229.59 KB / Downloads: 7)


Any tips or leads?
Thanks!]]> https://www.cbmstuff.com/forum/showthread.php?tid=806 Sat, 20 Mar 2021 23:18:01 -0400 admin]]> https://www.cbmstuff.com/forum/showthread.php?tid=806
If you have a donor motherboard, nearly everything can be transferred over to the ICS64S, saving you from having to purchase all new components.  Of course, new (modern) components results is a vastly superior setup!

https://www.cbmstuff.com/index.php?route...ation_id=8]]>
If you have a donor motherboard, nearly everything can be transferred over to the ICS64S, saving you from having to purchase all new components.  Of course, new (modern) components results is a vastly superior setup!

https://www.cbmstuff.com/index.php?route...ation_id=8]]>