cdtv now not working

terexuk · 16 March 2011, 20:09

Hi all,
As in the great tradition of me having a simple project too look forward to at the weekend everything has gone tits up!! . As mentioned in an earlier thread i was going too network my cdtv too the 1200 via parnet .
Orderded cable got the s/w together ready too roll

Switched on cdtv last night, booted ok then mouse pointer nosedived into the bottom right hand corner ,

oh dear i said ,so i switched it off and slowly backed out of the room muttering that it will be ok tommorrow.

suitably medicated i tried again tonight , nothing ,nada ,zilch just a black screen, oh flip i said as i manically grabbed my screwdriver set and whipped the casing off ,half an hour later having reseated all cables and chips she spung into life

replaced casing plugged everything back in and switched on and....................nothing, back to black screen

so before i go in for more deeper surgery and possibly knackering it completely any ideas ?

tia

cpiac64 · 16 March 2011, 21:42

verify voltage on psu

terexuk · 16 March 2011, 23:21

Quote:

Originally Posted by cpiac64

verify voltage on psu

voltages seem ok except connector c20 which is 5v thought it would be 12v and cn19 which is showing 3.6v which seems a bit low ?(should be 5v)
but being know expert i could be talking complete bollocks

cpiac64 · 16 March 2011, 23:31

cn 19 are power on/off
cn20 are 5v
verify cn121 are 12, 5 and -12 volt

terexuk · 17 March 2011, 20:45

Quote:

Originally Posted by cpiac64

cn 19 are power on/off
cn20 are 5v
verify cn121 are 12, 5 and -12 volt

right just checked those again and they seem fine

cpiac64 · 17 March 2011, 21:54

move jumper near fatagnus for exclude cd-rom end extended rom

connect an external floppy for boot with wb

terexuk · 17 March 2011, 22:15

ok update !!

replaced 2591 chip and with a.n other from old 500 and its sprung into life downside being no lcd display or ir remote control but fully boots up. Keyboard works ok but i have not got a mouse to try. if i can source a mouse im guessing this will work ok. so ,what does this chip control (2591)
and have you got a spare

time to source another broken cdtv. so to recap fully bootable, but no cursor control or lcd display , keyboard works fine ,cd reading disks

cpiac64 · 17 March 2011, 22:31

2591?

terexuk · 17 March 2011, 22:39

Quote:

Originally Posted by cpiac64

2591?

its the chip directly above the cd eject button full wording on chip as follows

252609-02
@1991 cbm
2591 14

as an aside what is the port on front hidden beneath a bit of plastic looks like a pcmia slot ?

tia

cpiac64 · 17 March 2011, 22:55

ok, you need a identic chip

rkauer · 18 March 2011, 06:38

Which chip you called 2591??????

The CDTV have all the same Amiga custom chips of the A500:

8520 CIA chips: lots of inputs and outputs
8371/8372/8375 Agnus (on UK/European models): Chip/video memory controller
8362 (OCS) or 8373 (ECS) Denise: video and right mouse button
8364 Paula (audio and ports)
5719 Gary chip.

The 252609-02 is the LCD controller chip.

Hewitson · 18 March 2011, 08:49

2591 is the date code

cpiac64 · 18 March 2011, 22:37

http://cgi.ebay.it/CDTV-Motherboard-...item3f0846bb1d

16 March 2011, 20:09	#1
terexuk Users Awaiting Email Confirmation Join Date: Dec 2008 Location: leicester Posts: 196	cdtv now not working Hi all, As in the great tradition of me having a simple project too look forward to at the weekend everything has gone tits up!! . As mentioned in an earlier thread i was going too network my cdtv too the 1200 via parnet . Orderded cable got the s/w together ready too roll Switched on cdtv last night, booted ok then mouse pointer nosedived into the bottom right hand corner , oh dear i said ,so i switched it off and slowly backed out of the room muttering that it will be ok tommorrow. suitably medicated i tried again tonight , nothing ,nada ,zilch just a black screen, oh flip i said as i manically grabbed my screwdriver set and whipped the casing off ,half an hour later having reseated all cables and chips she spung into life replaced casing plugged everything back in and switched on and....................nothing, back to black screen so before i go in for more deeper surgery and possibly knackering it completely any ideas ? tia

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16 March 2011, 21:42	#2
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	verify voltage on psu

16 March 2011, 23:31	#4
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	cn 19 are power on/off cn20 are 5v verify cn121 are 12, 5 and -12 volt

17 March 2011, 21:54	#6
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	move jumper near fatagnus for exclude cd-rom end extended rom connect an external floppy for boot with wb

17 March 2011, 22:15	#7
terexuk Users Awaiting Email Confirmation Join Date: Dec 2008 Location: leicester Posts: 196	ok update !! replaced 2591 chip and with a.n other from old 500 and its sprung into life downside being no lcd display or ir remote control but fully boots up. Keyboard works ok but i have not got a mouse to try. if i can source a mouse im guessing this will work ok. so ,what does this chip control (2591) and have you got a spare time to source another broken cdtv. so to recap fully bootable, but no cursor control or lcd display , keyboard works fine ,cd reading disks

17 March 2011, 22:31	#8
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	2591?

17 March 2011, 22:55	#10
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	ok, you need a identic chip

18 March 2011, 06:38	#11
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Which chip you called 2591?????? The CDTV have all the same Amiga custom chips of the A500: 8520 CIA chips: lots of inputs and outputs 8371/8372/8375 Agnus (on UK/European models): Chip/video memory controller 8362 (OCS) or 8373 (ECS) Denise: video and right mouse button 8364 Paula (audio and ports) 5719 Gary chip. The 252609-02 is the LCD controller chip.

18 March 2011, 08:49	#12
Hewitson Registered User Join Date: Feb 2007 Location: Melbourne, Australia Age: 41 Posts: 3,772	2591 is the date code

18 March 2011, 22:37	#13
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	http://cgi.ebay.it/CDTV-Motherboard-...item3f0846bb1d

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