Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Cyberhome CH-DVD 452 (DVD452) - Screen and St-By Light goes blank
Cyberhome CH-DVD 452 (DVD452) - Screen and St-By Light goes blank
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 29th November 2017, 10:05 AM   #1
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default Cyberhome CH-DVD 452 (DVD452) - Screen and St-By Light goes blank

Basically, this is based on a defective switching power supply. But on my two devices of the same model power supply provides all voltages with correct values (all electrolytic capacitors on the SPS-PCB already replaced).

If I open the tray (drawer) without connecting mains plug in the wall power outlet, closes the tray 5 seconds after plugging in the mains plug, but without lighting up of display and StBy LED and without any command acceptance.

Thus there are still the following possibilities:

1) damaged MPEG audio-video decoder chip
2) faulty local voltage regulation on the MPEG main board
3) RESET procedure necessary (maybe the most likely cause, but I don't find the according instructions)

Maybe this is a known bug of this model and maybe there is a schematic diagram available anywhere.

Thank you very much for advices in advance.

P.S. under
BBK DV718SI SM Service Manual download, schematics, eeprom, repair info for electronics experts
you will find the service manual of BBK's DV718SI, where the same MPEG video-audio decoder is in use (MT1389).
In the flow chart for "Power Not On" troubleshooting on page 34 to page 38 there are helpful advices.
The schematic of the DVD452 from Cyberhome would transform this troubleshooting to an easy task. Unfortunately this schematic I haven't.

Last edited by tiefbassuebertr; 17th March 2018 at 04:10 PM.
  Reply With Quote
Old 17th March 2018, 10:59 AM   #2
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default Pre-Programmed Failure Date on DVD Players?

I have heard, that there are several dvd player brands with pre-programmed failure date. Maybe this is just the case by this brand.
Since I now know many people who have the same problem as described in post #1, this could indeed be the case.
  Reply With Quote

Reply


Cyberhome CH-DVD 452 (DVD452) - Screen and St-By Light goes blankHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
To Screen or not to screen Vbe multiplier leads in HK1400 db0360 Solid State 2 13th August 2014 08:17 PM
Red Light District Amp Screen Reg mach1 Tubes / Valves 20 28th February 2007 09:37 PM
Blank screen when I click on the thumnails QSerraTico_Tico The Lounge 2 11th February 2005 09:50 PM


New To Site? Need Help?

All times are GMT. The time now is 03:35 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki