TF330 Red and Green screen on Diagrom

68030 + SDRAM + IDE

Moderators: terriblefire, Terriblefire Moderator

User avatar
kulamario
Posts: 237
Joined: Fri Nov 29, 2019 7:20 pm
Location: Greystones

TF330 Red and Green screen on Diagrom

Post by kulamario »

Due to the fact that I have no idea what may be wrong with this card, I am assuming this post
patient is tf330 in cd32 diagrom
cpld changed already 4 times so I exclude cpld problem
On all cpld I have the same effect
From TF330 I took the buffers and memory too, it didn't change anything
adds a video of how the card behaves





Maybe someone can give me some advice ?
The last thing that comes to mind is the cpu socket
maybe there is a short circuit from the bottom or something is not connected
terriblefire
Moderator Team
Moderator Team
Posts: 5368
Joined: Mon Aug 28, 2017 10:56 pm
Location: Glasgow, UK

Re: TF330 Red and Green screen on Diagrom

Post by terriblefire »

That is bad chip ram on cd32.. or at least TF330 is not happy with chip ram... Does it boot to diagrom without TF330? Is there bad pins in the riser maybe?
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
User avatar
kulamario
Posts: 237
Joined: Fri Nov 29, 2019 7:20 pm
Location: Greystones

Re: TF330 Red and Green screen on Diagrom

Post by kulamario »

I have other few TF330 what working perfect on same cd32 and same riser
Only my last two boards have some problem with run
One of this is in this post second I not show yet
Cd32 working on diagrom without this TF330
Is very strange behaviour I never have this b4
terriblefire
Moderator Team
Moderator Team
Posts: 5368
Joined: Mon Aug 28, 2017 10:56 pm
Location: Glasgow, UK

Re: TF330 Red and Green screen on Diagrom

Post by terriblefire »

Where did you get the PCB?
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
User avatar
kulamario
Posts: 237
Joined: Fri Nov 29, 2019 7:20 pm
Location: Greystones

Re: TF330 Red and Green screen on Diagrom

Post by kulamario »

jlcpcb
but other PCBs from this batch working
terriblefire
Moderator Team
Moderator Team
Posts: 5368
Joined: Mon Aug 28, 2017 10:56 pm
Location: Glasgow, UK

Re: TF330 Red and Green screen on Diagrom

Post by terriblefire »

kulamario wrote: Tue May 18, 2021 1:01 pm jlcpcb
but other PCBs from this batch working
can you put a serial adaptor into the ESP header and see what diagrom is saying... to me it looks like chip ram ... maybe a stuck / shorted control pin. Or a stuck address pin that meant it couldnt hit the CIA addresses to disable rom overlay...

Whatever the problem is its not simple and will take a lot of effort to figure out.. maybe its not worth it.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
User avatar
kulamario
Posts: 237
Joined: Fri Nov 29, 2019 7:20 pm
Location: Greystones

Re: TF330 Red and Green screen on Diagrom

Post by kulamario »

terriblefire wrote: Tue May 18, 2021 1:13 pm
kulamario wrote: Tue May 18, 2021 1:01 pm jlcpcb
but other PCBs from this batch working
can you put a serial adaptor into the ESP header and see what diagrom is saying... to me it looks like chip ram ... maybe a stuck / shorted control pin. Or a suck address pin that meant it couldnt hit the CIA addresses to disable rom overlay...

Whatever the problem is its not simple and will take a lot of effort to figure out.. maybe its not worth it.
tell me one thing
whether tf330 on diagrom should start only with cpu and cpld or must there be these four buffers?
I think diagrom should boot but not sure now
I forgot about connecting through the series hehehe
I'll connect in a moment and see what it shows
terriblefire
Moderator Team
Moderator Team
Posts: 5368
Joined: Mon Aug 28, 2017 10:56 pm
Location: Glasgow, UK

Re: TF330 Red and Green screen on Diagrom

Post by terriblefire »

The buffers are only there for fastram. CPLD + Crystal + CPU + regulator is enough to boot.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
User avatar
kulamario
Posts: 237
Joined: Fri Nov 29, 2019 7:20 pm
Location: Greystones

Re: TF330 Red and Green screen on Diagrom

Post by kulamario »

Code: Select all


Amiga DiagROM V1.2.1 - 16-Jul-20  - By John (Chucky/The Gang) Hertell


Testing if serial loopbackadapter is installed: <> NOT DETECTED
- Parallel Code $ff - Start of ROM, CPU Seems somewhat alive
    Checking status of mousebuttons for different startups:

    Set all Interrupt enablebits (INTENA $dff09a) to Disabled: Done
    Set all Interrupt requestbits (INTREQ $dff09c) to Disabled: Done
    Set all DMA enablebits (DMACON $dff096) to Disabled: Done

Testing if OVL is working: OK
- Parallel Code $fe - Test UDS/LDS line
  - Test of writing word $FFFF to $400 OK
  - Test of writing word $00FF to $400 OK
  - Test of writing word $FF00 to $400 OK
  - Test of writing word $0000 to $400 OK
  - Test of writing byte (even) $ff to $400 OK
  - Test of writing byte (odd) $ff to $401 OK
- Parallel Code $fd - Start of chipmemdetection

Addr $00000400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00008400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00010400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00018400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00020400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00028400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00030400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00038400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00040400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00048400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00050400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00058400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00060400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00068400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00070400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00078400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00080400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00088400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00090400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00098400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000A0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000A8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000B0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000B8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000C0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000C8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000D0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000D8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000E0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000E8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000F0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $000F8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00100400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00108400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00110400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00118400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00120400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00128400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00130400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00138400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00140400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00148400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00150400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00158400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00160400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00168400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00170400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00178400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00180400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00188400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00190400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $00198400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001A0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001A8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001B0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001B8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001C0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001C8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001D0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001D8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001E0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001E8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001F0400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED
Addr $001F8400
       Write: $AAAAAAAA  10101010101010101010101010101010
        Read: $AAAAAAA2  10101010101010101010101010100010  FAILED

       Write: $0F0F0F0F  00001111000011110000111100001111
        Read: $0F0F0F07  00001111000011110000111100000111  FAILED

NO Chipmem detected
- Parallel Code $fc - Trying to find some fastmem (as no chipmem found)
- Parallel Code $fb - Memorydetection done
- Parallel Code $80 - NO Chipmem detected
- NO MEMORY FOUND - HALTING SYSTEM


You have right no see chip memory but why this is a question
terriblefire
Moderator Team
Moderator Team
Posts: 5368
Joined: Mon Aug 28, 2017 10:56 pm
Location: Glasgow, UK

Re: TF330 Red and Green screen on Diagrom

Post by terriblefire »

kulamario wrote: Tue May 18, 2021 3:29 pm
You have right no see chip memory but why this is a question
D3 is shorted to ground... its pretty obvious from that.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Post Reply

Return to “TF330”