[TechAssist] Re: 27" Magnavox no Picture,no Sound, no OSD

From: peggs <peggs@xxxxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
Date: Wed, 18 Feb 2004 12:47:12 -0800
1. I can't enter the Service mode/find the Software Version by
volume Down........0,0,0..........Display.
All I get is the same Blank Raster.
The micro is A22V02, model 27ms345s, so I guess 4835 310 57596
is the one.

2. Should this set turn on with the EEprom removed ???
This one does(but with the bad symptoms).
I know the older Philips Mag chassis would as they were just
memory IC's.

I'm leaning toward Micro/EEprom as I seem to have strange
'control' problems.

Peggs

At 09:51 AM 2/18/04, Gemini Computer & TV wrote:
>This is all I could find:
>
>Symptom:
>A small number of these models may show the following symptoms:
>
>1) Sluggish response to turn-on command.
>it may take up to 15 commands to turn on the TV.
>
>2) Clock will loose vast amounts of time when TV is
>in off (in standby).
>CLUE The symptoms will only occur if there is a stereo signal at turn off.
>
>Cause:
>Software bug.
>
>Resolution:
>Install software patch by replacing the memory IC002.
>This is a 8 pin DIP.  Use only preprogrammed part.
>
>The part must match both the MCU version and the model.
>
>To view the s/w version press the volume down on the TV and hold when it
>reaches zero.  While holding the volume down at the TV press zero on the
>remote 3 times.  A letter D will appear in the upper right corner to
>indicate the
>Service Mode.  Press the remote DISPLAY to see the MCU at the bottom
>of the screen.  Press STANDBY to exit.
>MODEL             SOFTWARE VERSION DISPLAYED    SOFTWARE FIX NUMBER
>27MS343S  MCU: A22V01 - TO  4835 310 57593
>27MS345S  MCU: A22V01 - TO  4835 310 57594
>27MS343S  MCU: A22V02 - TO  4835 310 57595
>27MS345S  MCU: A22V02 - TO  4835 310 57596
>
>Complete instructions are included with the part ordered.
>
>Applies To:
>, 27MS343S, 27MS343S99, 27MS345S, 27MS345S99
>
>Bob Waterman, CET=AE #RI-28
>Master Technician License #9109
>Service Manager / Parts Manager
>Gemini Computer, TV, & Security Alarms
>(508)695-7302
>(508)695-7769 FAX
>geminitv@xxxxxxxxxxxxxxxx
>geminitv@xxxxxxx
>www.geminicomputertvsecurityalarms.com
>
>----- Original Message -----
>From: "peggs" <peggs@xxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>
>Sent: Wednesday, February 18, 2004 2:50 PM
>Subject: [TechAssist] Re: 27" Magnavox no Picture,no Sound, no OSD
>
>
> > I just removed the Audio output,fired the set up with the same symptom,
> > no picture,no sound(duh), and no OSD.
> > I then removed the EEprom, IC002, fired the set up with the same=
 symptom,
> > no picture,no sound, no OSD.
> >
> > Peggs
> >
> > At 09:14 AM 2/18/04, TechAssist wrote:
> > >I have one on the bench now that we believe to have a bad eeprom . Deat
>set
> > >but the red power led remains lit. We are gathering a bit of info on=
 this
> > >new cheap chassis.
> > > >From a tech line phone call:
> > >  tech suggests lifting Pins 5 and 6. If set
> > >comes on replace the eeprom.
> > >and
> > >For  Magnavox Model 27MS343S
> > >
> > >
> > >Look on the eeprom for the version number.
> > >
> > >a. If it is version A22V02 use 4835 310 57595,
> > >
> > >b. If it is version A22V01 use 4835 310 57593.
> > >
> > >
> > >To enter the service mode,
> > >
> > >a. Press Volumn down on the set untio "0",
> > >
> > >b. Then press "0" on the remote 3 times. This will put a "D" on the
>screen.
> > >
> > >c. Now press display on the remote.
> > >
> > >
> > >Jay
> > >Jay's TV
> > >Clarksburg, WV
> > >----- Original Message -----
> > >From: "peggs" <peggs@xxxxxxxxxxxxx>
> > >To: <techassist@xxxxxxxxxxxxx>
> > >Sent: Wednesday, February 18, 2004 2:03 PM
> > >Subject: [TechAssist] 27" Magnavox no Picture,no Sound, no OSD
> > >
> > >
> > > > This thing is only 6 months old.
> > > > model 27ms345s
> > > > no chassis # found
> > > > man. July 2003
> > > > Customer's complaint was it had no Audio originally.
> > > > He called 'help line',they said unplug it for 15 minutes to Reset=
 it.
> > > > When he plugged it back in, it wouldn't even come on.
> > > >
> > > > He's close but not exactly.........
> > > > No picture,Sound or OSD on Tuner or A/V input.
> > > > HV is OK.
> > > > Vertical Deflection is OK.
> > > > Filament is OK.
> > > > Turning up Screen Control(G2) produces Blank Raster.
> > > >
> > > > All voltages seem fine on PS Secondary Rectifiers,any TO220
> > > > regulators(5v,9v,12v),B+ is on Audio Output also.
> > > >
> > > > Stand-by Light comes on at Plug-in.
> > > > Both Power Switch and Remote will turn the set on(stand-by light=
 goes
> > > > out)............
> > > > ..........more troubleshooting...........
> > > >
> > > > The Set turned on with the Remote fine but no Audio.
> > > > Channels changed(Blue Screen til I hit an active channel), had
> > > > reception,OSD.....
> > > > ......everything but Sound.
> > > > Turned set Off,and back On.......Blank Raster,no Sound no OSD.
> > > > Haven't been able to get it to come back on properly
> > > >
> > > > Peggs
> > > > Peggs' Electronics
> > > > 1519 West 2nd Street
> > > > Owensboro,KY 42301
> > > > 270-926-4968
> > > > fax 270-686-7399
> > > > peggs@xxxxxxxxxxxxx
> > > >
> > > >
> > >
> >=
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> >
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References:
- [TechAssist] 27" Magnavox no Picture,no Sound, no OSD
  - From: peggs
- [TechAssist] Re: 27" Magnavox no Picture,no Sound, no OSD
  - From: peggs
- [TechAssist] Re: 27" Magnavox no Picture,no Sound, no OSD
  - From: Gemini Computer & TV
[TechAssist] Re: 27" Magnavox no Picture,no Sound, no OSD

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