[TechAssist] Re: Goldstar GCV1924M TV/VCR - FIXED
- From: "Roger G./Mr Fix-It" <rogerfixit@xxxxxxxxxxx>
- To: Premium Technologies <premtech@xxxxxxxxxxxxxx>, TECHASSIST <techassist@xxxxxxxxxxxxx>
- Date: Mon, 21 Nov 2005 23:43:55 -0500
Bill & Chris
Replaced IC101 - 6volt regulator - unit came back to life.
IC checked ok but obviously not. Guess it supplies standby voltage to
micro which was not activating load motor IC.
Thanx
Roger G.
Mr. Fix-It Harrisburg, PA 17110
WebSite- http://mrfixit.netfirms.com
Alternate - rogerfixit@xxxxxxxx
FAX 510-740-3641; Tel: 717-540-0799 (shop)
Premium Technologies wrote:
> Roger,
> Try replacing Ic101 (AN7806) the 6v regulator and also check Ic102 (AN7812) -
> 12v regulator.
> Ic101 is a common failure that can cause the symptoms you're describing.
> Bill
>
> William Rayburn, CET
> Premium Technologies
> PO Box 442
> Long Beach, WA. 98631
> 360-642-4993
>
> ----- Original Message -----
> From: "Roger G./Mr Fix-It" <rogerfixit@xxxxxxxxxxx>
> To: "TECHASSIST" <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, November 19, 2005 10:48 PM
> Subject: [TechAssist] Re: Goldstar GCV1924M TV/VCR - mechanismproblem-Further
>
>
> Changed the motor driver IC (BA6209 type) but nothing changed.
> Do not get voltage to load motor.
> About to blame micro and bag it unless someone has another idea.
> TIA
>
> Roger G.
>
> Mr. Fix-It Harrisburg, PA 17110
> WebSite- http://mrfixit.netfirms.com
> Alternate - rogerfixit@xxxxxxxx
> FAX 510-740-3641; Tel: 717-540-0799 (shop)
>
> Roger G./Mr Fix-It wrote:
>> Chris-
>> I appreciate your taking the time to post. I did rotate the load mtr off
>> of stop but it never moved at all. I think there is one of those 10-pin
>> motor drive IC's which I can check. Problem with this unit- unlike some
>> where you can power up the VCR separately, it is awkward to troubleshoot
>> - but somebody has to do it !!
>> Roger G.
>>
>> Mr. Fix-It Harrisburg, PA 17110
>> WebSite- http://mrfixit.netfirms.com
>> Alternate - rogerfixit@xxxxxxxx
>> FAX 510-740-3641; Tel: 717-540-0799 (shop)
>>
>> Christopher Barnak wrote:
>>> Roger,
>>> After re-reading your post. Maybe it is the Micro.
>>> But, many combo's will not come on until the stop
>>> or eject mode is correct. So if the mode switch is manually set to
>>> stop and it still does not come on,
>>> then I would suspect the micro, BUT check the power
>>> supply, micro oscillator, B+ to micro and the reset pin
>>> to make sure it is normal. I suspect a missing voltage,
>>> as the Micro failure is rare and I've been bit by it so many
>>> times, only to find out it was something other than the Micro.
>>> But, it still could be the Micro.
>>>
>>> Chris
>>>
>>>
>>>
>>>>>> cbarnak@xxxxxxxxxxxxx 11/10/05 7:28 AM >>>
>>> Maybe the load motor SHOULD BE running and it can't
>>> because there is no voltage supplied to it.
>>> Unplug set. Rotate the motor to move the guideposts up alittle to
>>> put the mechanism in a position that the unit would normally try to
>>> reset to the stop postion upon plug in.
>>>
>>> If the unit does not try to correct itself, then check the
>>> voltage being supplied to the load motor. It should be
>>> there and ususally about 12 volts.
>>>
>>> If not, then check that the Micro is actually telling the loading
>>> motor IC to do it's job. If you do not have the
>>> schematic, then look up an equivalent IC in the NTE
>>> book and find what pins are the control pins.
>>>
>>> If the IC does not get a control signal from the Micro,
>>> then either the micro is partially not working or look
>>> for the most overlooked - A broken pattern.
>>>
>>> You may already know all this stuff, but I'm just
>>> writing it in case you don't.
>>>
>>> Good Luck,
>>>
>>> Chris
>>>
>>>
>>>
>>>>>> rogerfixit@xxxxxxxxxxx 11/09/05 7:04 PM >>>
>>> Load motor does NOT run; take up reel does.
>>> Resoldered sensor board; reconditioned mode switch; cleaned surfaces
>>> on
>>>
>>> reels - no difference.
>>> Note = power switch has no effect and TV does not come on either.
>>> Starting to suspect micro problem.
>>>
>>> Anything else ??
>>> Thanx
>>> Roger G.
>>>
>>> Mr. Fix-It Harrisburg, PA 17110
>>> WebSite- http://mrfixit.netfirms.com Alternate - rogerfixit@xxxxxxxx
>>> FAX 510-740-3641; Tel: 717-540-0799 (shop)
>>>
>>> Christopher Barnak wrote:
>>>> Roger,
>>>> If the loading motor runs when set is plugged in, then the cassette
>>>> load or tape load mechanism is bound up and the mode switch never
>>>> reachs the stop or eject position.
>>>> Could be the mode switch, I refurbish almost all mode switchs
>>>> on units that come in with a control type of problem.
>>>> And I If the load motor does not run, but the unit takeup reel
>>>> turns on power up, then I would suspect that the unit
>>>> has a reel sensor under the supply reel and it is not working. It is
>>>> common in many VCR's for the Micro to
>>>> run the takeup reel and then look for a pulse from the
>>>> the supply reel sensor. This is to make sure no slack
>>>> is in the tape. (Remember the Sharps that would not
>>>> eject a broken tape).
>>>>
>>>>
>>>> Christopher Barnak, CET
>>>> Norfolk Public Schools
>>>> Electronics Maintenance
>>>> 966 Bellmore Ave.
>>>> Norfolk, Va. 23504
>>>>
>>>> Phone 757 628 3385
>>>> Fax 757 628 3392
>>>> cbarnak@xxxxxxxxxxxxx
>>>>
>>>>>>> rogerfixit@xxxxxxxxxxx 11/08/05 10:37 PM >>>
>>>> Goldstar GCV1924M Combo
>>>> Problem- Customer said was playing a tape then stopped. Tape is
>>> stuck.
>>>> I found unit in full load condition with tape broken and all of it
>>> on
>>>
>>>> take-up reel. Power-on starts takeup reel turning.
>>>> Ran load motor (with external power) to eject tape and reset unit.
>>>> Reattached to unit expecting it to work BUT - all that happens is
>>>> takeup reel turns - power button or eject btns do not function.
>>>>
>>>> Pulled tape transport. Checked alignment; bottom slider; mode switch
>>>> sensor circuit board - all looked ok. Load motor is ok - ran it to
>>>> eject.
>
-----------------------------------------------------------------------------
This Email List is accessible to the general public through search engines.
Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
- » [TechAssist] Re: Goldstar GCV1924M TV/VCR - FIXED
