Featured
Latest
Share:
Notifications
Clear all

Forum 1

VCR Panasonic DMR EX98V

12 Posts
6 Users
0 Reactions
95 Views
colourmaster
(@colourmaster)
Posts: 425
Honorable Member Registered
Topic starter
 

Hi everyone 

My hard drive dvd VHS machine has locked up displaying U99. Any help would be greatly appreciated. I've done the usual and unplugged it.

Kind regards Gary 

 

 
Posted : 19/01/2025 10:38 pm
Nuvistor
(@nuvistor)
Posts: 4652
Famed Member Registered
 

@colourmaster Don’t know if this will help.

https://archive.org/details/panasonic_dmr-ex98veb_veg_vec_vol.1-1/page/19/mode/1up

It states U99 error.

Displayed when communication error has occurred between Main microprocessor and Timer microprocessor.

 

Frank

 
Posted : 19/01/2025 11:26 pm
Cathovisor
(@cathovisor)
Posts: 6684
Famed Member Registered
 

@colourmaster A lot of the faults on these machines are down to the small electrolytics drying out in the various little switching regulators that generate 'odd' rails like the 1.8V supply. There's usually a six-pin chip and small inductor as part of the circuit. I have the predecessor machine (the EX95) and changed a few caps in that.

 
Posted : 20/01/2025 5:53 am
crustytv
(@crustytv)
Posts: 12249
Vrat Founder Admin
 

Fully agree with @cathovisor, about seven years ago I repaired an earlier model, that was exhibiting all sorts of strange errors. Once the electrolytics were replaced, normal service was resumed. Get your soldering iron out, It may not be a G8 😉 but it's highly probable a simple fix.

CrustyTV Television Shop: Take a virtual tour
Crusty's TV/VCR Collection: View my collection

 
Posted : 20/01/2025 8:29 am
Cathovisor
(@cathovisor)
Posts: 6684
Famed Member Registered
 

@crustytv As long as the EX98 hasn't changed those electrolytics to surface mount ones 😉

I'm amazed at the prices those machines still realise on ebay and the like.

 
Posted : 20/01/2025 8:59 am
irob2345
(@irob2345)
Posts: 741
Honorable Member Registered
 

Actually I find the SMD electros easier to change than the through-hole ones.

 
Posted : 20/01/2025 9:06 am
Michael Dranfield
(@michael-dranfield)
Posts: 365
Reputable Member Registered
 

SMD easy if your pace soldering station comes with this tool.

IMG 20250120 092656

 

 
Posted : 20/01/2025 9:32 am
crustytv
(@crustytv)
Posts: 12249
Vrat Founder Admin
 

The service manual for the device is now in the library for you. 👍 

p.s

U99 is a DVD self diagnosis error code, not related to the VHS, or HD side, so at least you know where to start.

CrustyTV Television Shop: Take a virtual tour
Crusty's TV/VCR Collection: View my collection

 
Posted : 20/01/2025 9:53 am
Cathovisor
(@cathovisor)
Posts: 6684
Famed Member Registered
 

@irob2345 Depends if they've been glued or not. I still view the damned things - along with lead-free solder - as Engines of Satan.

 
Posted : 20/01/2025 11:45 am
Cathovisor
(@cathovisor)
Posts: 6684
Famed Member Registered
 

Posted by: @crustytv

U99 is a DVD self diagnosis error code, not related to the VHS, or HD side, so at least you know where to start.

I wonder if that generation of machine still ties the "digital" board to the DVD mechanism? AFAIK the calibration of the DVD mech (servos, laser power etc.) is all stored on that board.

 
Posted : 20/01/2025 11:47 am
colourmaster
(@colourmaster)
Posts: 425
Honorable Member Registered
Topic starter
 

Hi everyone,

Many thanks for all your advice, I've ordered a Panasonic repair kit for this model so I'll keep you posted.

Kind regards 

Gary.

 
Posted : 22/01/2025 10:53 pm
Cathovisor
(@cathovisor)
Posts: 6684
Famed Member Registered
 

@colourmaster I didn't know those repair kits existed? Could be useful in the future...

 
Posted : 23/01/2025 6:08 am
Share: