Sega Hang On

[Dave_c]

Ok finally got my hang on working a few weeks back, the game plays but there are no bends in the road, the sign to say there's a bend coming comes up but the road continues straight.
Any Ideas??

 

[Guests]

nice fault, take a video

 

[Dave_c]

It makes it easy to complete the game and gives a time taken of 9999999999. I'll try to do a vid the weekend

 

[PaulSwan]

Some sort of test mode switch somewhere?

 

[JohnBud]

get some decent smoke and a fan blower

ease off with the revs and enjoy the ride

 

[Dave_c]

Test mode is what i thought but no such luck

 

[Guests]

there is a service mode for hangon (according to mame anyway) with a memory test in it

 

[Dave_c]

Ive been through that before and all ram and roms come back as ok.

 

[trm]

Got any video yet? Once you've got it on youtube you can link it directly into your post. Am quite keen to see what this looks like.

 

[Dave_c]

Sorry been busy, ive got the weekend off so i'll do it then

 

[trm]

Sorry - didn't mean to make it sound like I was bugging you but it sounds like an interesting problem which should have an interesting fix! I look forward to helping.

 

[Dave_c]

No worries, i didnt think anything of it anyway

 

[karlcdoe]

Did you ever get this fixed? Although I believe the PCBs are a lot different AFAIK Hang on still uses 2x 68K CPUs as per (turbo)Outrun and I have just chanced on the following repair log that might help:

http://www.arcadecomponents.com/repairlogs.html#66687

"Sega Turbo Outrun is missing obstacles and
backgrounds
This was a strange one. The sky and road obstacles were
missing. The buildings were there but the road and the car never moved
left or right. This was a problem with the subprocessor. Built-in tests
showed one of the ROMs bad. ROM read good in an EPROM programmer and a
replacement ROM gave the same symptoms. Checked all the pins on the
socket for continuity. The ROM pairs (High & Low) had a common CE
line. This was driven by a 74LS138. The chip had badly rusted legs.
Replaced the chip and the game worked normally. The rust had travelled
up the body of the chip."

 

[Dave_c]

Thanks i'll ave a read. Ive not had much time to look at it recently ive been busy at work and rewiring the games room, plastering, flooring etc hopefully i'll get some time as it just sitting in the corner gathering dust