[TechAssist] Re: Sony projo G2 adjust
- From: becyn <becyn@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 28 Jan 2005 11:18:16 -0500
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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