[TechAssist] Re: Sony projo G2 adjust
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 28 Jan 2005 16:02:30 -0500
Probably go for lunch and worry about it later.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
Kevin wrote:
> What is the 12 o'clock rule?
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of becyn
> Sent: Friday, January 28, 2005 8:18 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Sony projo G2 adjust
>
> when all else fails....use the 12 'oclock rule and work your way out
> fron there!
>
> Jim McVey
> McVey Alltronix
> 327 Broadway
> Newburgh N.Y. 12550
>
> "If it doesn't play...
> CALL MCVEY !!!!!!"
> Factory authorized
> service for over 20
> major brands.
> 845 561 8383
> (Last of the Mohegans)
>
> damon101@xxxxxxxxxxxxxx wrote:
>
>
>>No.....that's IK Screen setup.....the foundation of Crt White Balance.
>>
>>You gotta do a lot more for white balance.....and I ain't got the time
>
> to
>
>>tell you.
>>
>>Damon Brunger
>>Telrad Electronics
>>Fort Wayne IN
>>----- Original Message -----
>>From: "peggs" <peggs@xxxxxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>
>>Sent: Thursday, January 27, 2005 1:56 PM
>>Subject: [TechAssist] Re: Sony projo G2 adjust
>>
>>
>>
>>
>>
>>>Do you mean..
>>>turn up the Red til visible, then down to black(barely not visible)
>>>turn up the Green till visible,then down to black(barely not visible)
>>>turn up the Blue til visible,then down to black(barely not visible)
>>>The you have 'decent' Grey Scale ???
>>>Peggs
>>>
>>>At 05:19 AM 1/27/05, damon101@xxxxxxxxxxxxxx wrote:
>>>
>>>
>>>
>>>>Out in the field I just switch to an unused video input, turn up the
>>>>
>>>>
>>
>>screens
>>
>>
>>
>>>>and down to black.....works 99% of the time.
>>>>If I'm feeling "tweaky" I'll then measure the cathode voltage and see
>
> if
>
>>>>it's within 5 volts of each other. If it's outside of 20V dc
>
> variation,
>
>>>>
>>>>
>>
>>then
>>
>>
>>
>>>>the oddball one is your bad tube. Feeling "super tweaky"?? Pull out
>
> your
>
>>>>scope and measure the IK pulses for the oddball one......normally I
>
> use
>
>>>>
>>>>
>>
>>that
>>
>>
>>
>>>>with intermittant color shifting reported by the customer.
>>>>
>>>>Damon Brunger
>>>>Telrad Electronics
>>>>Fort Wayne IN
>>>>----- Original Message -----
>>>>From: "Leonard Caillouet" <lcaillo@xxxxxxxxxxxx>
>>>>To: <techassist@xxxxxxxxxxxxx>
>>>>Sent: Thursday, January 27, 2005 7:56 AM
>>>>Subject: [TechAssist] Re: Sony projo G2 adjust
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Good question. What I have found is when I have a tracking problem,
>>>>>
>>>>>
>>
>>it is
>>
>>
>>
>>>>>usually mostly in one tube. I like to start with the G2 dead on as
>
> a
>
>>>>>reference and sometimes the bad tube needs to be tweaked of a bit.
>
> I
>
>>>>>
>>>>>
>>
>>find
>>
>>
>>
>>>>>it helps to have the other two tracking as close as possible as a
>>>>>
>>>>>
>>
>>start.
>>
>>
>>
>>>>>Reduce the variables, then fudge it if you have to. The jig seems
>
> to
>
>>>>>minimize the interactions with the other adjustment, btw, though on
>
> a
>
>>>>>
>>>>>
>>
>>set
>>
>>
>>
>>>>>with poor tracking you still have to fudge at least one tube. I try
>>>>>
>>>>>
>>
>>to
>>
>>
>>
>>>>>leave the one that tests best as a reference and don't touch the G2
>
> on
>
>>>>>
>>>>>
>>>>
>>>>that
>>>>
>>>>
>>>>
>>>>>one again.
>>>>>
>>>>>I also like to set the G2 by looking in the CRTs. I find it easier
>
> to
>
>>>>>
>>>>>
>>
>>be
>>
>>
>>
>>>>>sure of the level and it is not always possible to make the room
>
> dark.
>
>>>>>
>>>>>
>>>>
>>>>Sony
>>>>
>>>>
>>>>
>>>>>makes this a PITA because the screens are hard to remove much of the
>>>>>
>>>>>
>>
>>time,
>>
>>
>>
>>>>>so I can't always do so unless we have pulled the chassis to the
>
> shop,
>
>>>>>
>>>>>
>>>>
>>>>then
>>>>
>>>>
>>>>
>>>>>it is easy, but final tweaking has to be done on the screen.
>>>>>
>>>>>Also, always remember to tweak the gray scale looking at the set
>>>>>
>>>>>
>>
>>straight
>>
>>
>>
>>>>>on, not from one side or the other. While the sets in recent years
>>>>>
>>>>>
>>
>>have
>>
>>
>>
>>>>>become much better about it, there is still a gray scale shift from
>>>>>
>>>>>
>>
>>side
>>
>>
>>
>>>>to
>>>>
>>>>
>>>>
>>>>>side due to the angles of the tubes. I prefer the stairstep
>
> patterns
>
>>>>>
>>>>>
>>
>>with
>>
>>
>>
>>>>>the horizontal bars. Since I have an older Sencore unit that has
>
> the
>
>>>>>vertical bars, and don't have a portable, I use the DVE disc in the
>>>>>
>>>>>
>>
>>field
>>
>>
>>
>>>>or
>>>>
>>>>
>>>>
>>>>>tweak on a b&w pix. The latter is my preference if the tubes are
>>>>>
>>>>>
>>
>>tracking
>>
>>
>>
>>>>>normally, but you need a stairstep to see which tube is non linear
>>>>>
>>>>>
>>
>>with
>>
>>
>>
>>>>the
>>>>
>>>>
>>>>
>>>>>others and at what levels.
>>>>>
>>>>>Leonard Caillouet
>>>>>Electronics World
>>>>>1261 NW 76 Blvd
>>>>>Gainesville, FL 32606
>>>>>352-332-5608
>>>>>FAX 352-332-5668
>>>>>
>>>>>
>>>>>----- Original Message -----
>>>>>From: "Bob Derrick" <bderrick@xxxxxxxxxxxxxxx>
>>>>>To: <techassist@xxxxxxxxxxxxx>
>>>>>Sent: Wednesday, January 26, 2005 10:23 PM
>>>>>Subject: [TechAssist] Re: Sony projo G2 adjust
>>>>>
>>>>>
>>>>>I have only used the course and make the room as dark as I can or
>>>>>
>>>>>
>>
>>throw a
>>
>>
>>
>>>>>quilt over the set and me. Leonard in the case where "there is a
>
> gray
>
>>>>>
>>>>>
>>>>
>>>>scale
>>>>
>>>>
>>>>
>>>>>tracking problem" did the jig dramatically improve the tracking, or
>
> to
>
>>>>>
>>>>>
>>
>>the
>>
>>
>>
>>>>>point that you were satisfied with the result?
>>>>>
>>>>>Robert Derrick
>>>>>Leader tv and Video
>>>>>Rochester, NY
>>>>>
>>>>>-----Original Message-----
>>>>>From: techassist-bounce@xxxxxxxxxxxxx
>>>>>[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Leonard
>
> Caillouet
>
>>>>>Sent: Wednesday, January 26, 2005 12:00 PM
>>>>>To: techassist@xxxxxxxxxxxxx
>>>>>Subject: [TechAssist] Re: Sony projo G2 adjust
>>>>>
>>>>>
>>>>>I have done both the coarse and the fine adjustments and found that
>>>>>
>>>>>
>>
>>the
>>
>>
>>
>>>>>voltages are pretty close with the coarse adjustment, so I don't
>>>>>
>>>>>
>>
>>bother
>>
>>
>>
>>>>with
>>>>
>>>>
>>>>
>>>>>the fine adjustment and the jig unless there is a gray scale
>
> tracking
>
>>>>>problem. If you need the jig I can send you the .pdf.
>>>>>
>>>>
>>>>>From Sony:
>>>>
>>>>>3-1. SCREEN VOLTAGE ADJUSTMENT
>>>>>(COARSE ADJUSTMENT)
>>>>>1. Receive the Monoscope signal.
>>>>>2. Set 50% BRIGHTNESS and minimum PICTURE.
>>>>>3. Turn the red VR on the FOCUS block all the way to the left
>>>>>and then gradually turn it to the right until the point where you
>>>>>can see the retrace line.
>>>>>4. Next gradually turn it to the left to the position where the
>>>>>retrace line disappears.
>>>>>
>>>>>3-2. SCREEN (G2) ADJUSTMENT
>>>>>(FINE ADJUSTMENT)
>>>>>Fine Mode is recommended to set screen controls to their optimal
>>>>>condition. It is necessary to build the simple jig, illustrated
>
> below,
>
>>>>>using 3-watt resistors. Please note, that if the proper voltage is
>
> not
>
>>>>>obtained with their listed values, resistors, then please increase
>
> or
>
>>>>>decrease one of the values in the resistor network to obtain the
>>>>>correct voltage.
>>>>>1. Select VIDEO1 mode without signals.
>>>>>2. Connect G2 JIG.
>>>>>3. SW on JIG.
>>>>>4. Connect an oscilloscope to the TP701(KR), TP732(KG) and
>>>>>TP761(KB) of CR board, CG board and CB board.
>>>>>5. Adjust R, G and B screen voltage to 170-173V with screen
>>>>>VR on the Focus block.
>>>>>
>>>>>
>>>>>Leonard G. Caillouet
>>>>>Electronics World
>>>>>1261 NW 76 Blvd
>>>>>Gainesville, FL 32606
>>>>>352-332-5608
>>>>>352-332-5668 FAX
>>>>>----- Original Message -----
>>>>>From: "Tony S" <tcselectronics@xxxxxxxxx>
>>>>>To: <techassist@xxxxxxxxxxxxx>
>>>>>Sent: Wednesday, January 26, 2005 10:41 AM
>>>>>Subject: [TechAssist] Sony projo G2 adjust
>>>>>
>>>>>
>>>>>Hi guys,
>>>>>Just wondering if anyone has a simple method to precise adjustment
>
> for
>
>>>>>
>>>>>
>>
>>G2
>>
>>
>>
>>>>>adjust on SONY big screens with out hauling out the scope and making
>
> a
>
>>>>>
>>>>>
>>>>
>>>>test
>>>>
>>>>
>>>>
>>>>>jig.
>>>>>
>>>>>many thanks,
>>>>>
>>>>>Tony Saracco
>>>>>TCS ELECTRONICS
>>>>>406 Andra Ct.
>>>>>Gilberts, IL 60136
>>>>>tcselectronics@xxxxxxxxx
>>>>>
>>>>>
>>>>>
>>>>>
>>>
>>>----------------------------------------------------------------------
>
> ----
>
>>>
>>>
>>>
>>>>--
>>>>
>>>>
>>>>
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>>>>>Checked by AVG Anti-Virus.
>>>>>Version: 7.0.300 / Virus Database: 265.7.4 - Release Date: 1/25/05
>>>>>
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>>>>>
>>>>>
>>>>>
>>>>>
>>>
>>>----------------------------------------------------------------------
>
> ----
>
>>>
>>>
>>>
>>>>--
>>>>
>>>>
>>>>
>>>>>-
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>>>>>
>>>
>>>----------------------------------------------------------------------
>
> ----
>
>>>
>>>
>>>
>>>>--
>>>>
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>>>>
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>>>>>
>>>>>
>>>
>>>----------------------------------------------------------------------
>
> ----
>
>>>
>>>
>>>
>>>>---
>>>>
>>>>
>>>>
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>>>>>
>>>>
>>>>
>>>>
>>>
>>>----------------------------------------------------------------------
>
> -----
>
>>>
>>>
>>
>>--
>>
>>
>>
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>>>
>>>--
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>>>
>>>
>>>
>>>----------------------------------------------------------------------
>
> ----
>
>>>
>>>
>>
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>>
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>>
>>
>>
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