How To Prevent RGB From Triggering 16:9 Ratio

[OptimusPrime]

my remote control had a function to switch between 4:3 and 16:9 ratios but I've long since lost that and I can't stand the cheap widescreen look that the RGB sets off.

any ideas?

[sam1981]

Not sure quite what you mean, but if you want a replacement remote...

http://www.telly-parts.co.uk/

[hobo]

the teletext button returns my TV to normal after RGB sets off the widescreen look but that was probably on your remote control too

[wod]

u need to alter the scart lead , i think its pin 8 u cut the resistor or something like that.

[fuzzybee]

u need to alter the scart lead , i think its pin 8 u cut the resistor or something like that.

Yes pin 8 is the RGB/16-9 autoswitch pin but if he did cut the pin how would he select the AV channel as it would not then autoswitch to the RGB/AV channel I suspect a universal remote would do the trick and they are as little as ?8

[gIzzE]

Just remove pin 8, you will still get RGB but it will leave it in 4:3.
Pin 8 gives out 5v to switch your tv to widescreen and with the cable snipped you get round this.
you may find that pin 8 is linked to pin 16, if this is the case try and leave pin 16 connected still.

[mallet]

I had to do this fix recently due to my DVD player making my TV switch when it shouldn't. Open one end of the lead and just snip the wire. doddle.

[OptimusPrime]

Just remove pin 8, you will still get RGB but it will leave it in 4:3.
Pin 8 gives out 5v to switch your tv to widescreen and with the cable snipped you get round this.
you may find that pin 8 is linked to pin 16, if this is the case try and leave pin 16 connected still.

didn't work . what i got was 4:3 ratio all the time as well as composite output (not RGB) regardless of whether I set the switch on the cable to DVD (Composite) or Game (RGB).

So now I'm not getting RGB. All I did was snip the wire going into pin 8. Or did I do something wrong.

That dreadful dot crawl is back. I hate that.

EDIT: It gets worse. This how the story went:

(1)

brown wire to pin eight has been snipped. There is another wire going from pin 8 to 16. That is intact.

(2)

I got constant 4:3 ratio output on TV BUT in composite mode. A quick consultation with http://www.gamesx.com/hwb/co_Scart.html tells me that I've disabled the cable's RGB switch AS WELL as the 16:9 triggering thing.

(3)

So I says to myself, **** composite I want RGB back at all costs, 4:3 ratio or not. So I do an amatuer thing and join the copper from the snipped brown wire back to the portion of the brown wire copper that is still soldered to pin 8. I inter-twine the two segments TIGHTLY together.

(4)

result. Well in Composite/DVD mode I get a black screen. In RGB/Game mode I get a blue screen.

(5)

What now?

[gIzzE]

the wire that went to pin 8 should have a resistor or another wire going to pin 16 to.
did you completly cut it hence cutting it from pin 16 too ???
you should have cut it leaving pin 16 connected.
this is the pin that needs voltage to tell it it is RGB, just attach the cut wire to pin 16 bypassing pin 8.

[OptimusPrime]

the wire that went to pin 8 should have a resistor or another wire going to pin 16 to.
did you completly cut it hence cutting it from pin 16 too ???
you should have cut it leaving pin 16 connected.
this is the pin that needs voltage to tell it it is RGB, just attach the cut wire to pin 16 bypassing pin 8.

refer to my edited post above yours.

so no I didn't cut the wire going from 8 to 16. that is still there. (phew)

so ok, i should now plug the brown wire into pin 16, right? i'll give it a try..

[gIzzE]

you need to make sure pin 8 and 16 are not connected together, but you need that wire you cut to be connect to just pin 16.

[Zed]

I get the same problem, apparently with some TV types you can hold down a certain button combination to enter diagnostic or service mode, whereby you can disable the auto-switching feature.

http://www.epanorama.net/links/servicemanuals.html

For a Sony TV it seems to be (not tested yet):

HOW TO ENTER SERVICE MODE
First, turn off power with the main switch on the front panel.
Hold the plus and minus buttons on the front panel and turn on power. Wait for picture, then release the plus and minus buttons. It now shows "TT" (test mode) on screen.
Once "TT" isdisplayed, select a number from the remote:
The newer Sony televisions use a different procedure to senter service mode:
Turn on the main power switch and enter into the stand-by mode.
Press the following sequence of buttons on the Remote Control:
info/disp (OSD)
5 (Number 5)
vol+ (Volume Up)
TV
-or-
[it]
[5] (Number 5)
[vol+] (Volume Up)
[teletext off]
The television will turn on and "TT" will appear in the upper right corner of the screen. Other status information will also be displayed. Press "MENU" on the remote control to obtain the following menu on the screen: Picture Adjustment Geometry Wide IC Status MSP Current TV status
Also you can enter "TT" mode by opening the little hatch on the front, holding [P+] and [P-] (prog. button) switching main power on - then pressing menu twice enters the service menu.
Move to the corresponding adjustment using the button on the remote. Press the + button to enter the selected adjustment. Turn off the power to quit the service mode or enter 0, 0 (zero twice) when adjustments have been completed.


ITEM DESCRIPTION
-------------------------------------------------------------
00 TT Mode off
01 Service menu on
02 No function
03 Set vol to 30%
04 Service menu in "Service Mode"
05 Serve menu in "production Mode"
06 Set vol. to 80%
07 Aging mode
08 Shipping condition (Production request)
09 Language reset
13 Display of software version
14 Production info display
22 Operating timer and error mem. display

NAVIGATE IN SERVICE MODE
The service menu (01):
Up/Down (menu keys) you may select the module (controller chip) to modify.
OK selects the highlighted module.
Choose a parameter with Up/Down. OK then selects the parameter.
Up/Down changes the value.
OK writes the value to memory.
"Speaker Off" will toggle the display of the menu. The function is kept even when the menu is not displayed.

he two items relating to aspect change are:

14 ASP Aspect Ration Control 4:3 Mode 0-63 FIX 47 47 0: 75%(16x9 CRT Full), 31: 100%(4x3 CRT Full), 63: 110%
15 ASP1 Aspect Ration Control 16:9 Mode 0-63 FIX 47 47 0: 75%(16x9 CRT Full), 31: 100%(4x3 CRT Full), 63: 110%

[shortround]

i believe pin 8 requires +12v to auto switch to 4:3 (+5v = 16:9). so what you could do is reconnect all the wires back to how they were originally, but add a capacitor between the wire and pin 8 to increase the voltage to +12. i'm not sure what value capacitor you'd need but any electronics shop should be able to advise.

[OptimusPrime]

you need to make sure pin 8 and 16 are not connected together, but you need that wire you cut to be connect to just pin 16.

hang on I thought you said to keep the wire that was going from 8 -> 16? The one with the resistor in the middle? Should I cut that connection too?

Oh and the brown wire that went to 8 that I should now fix to 16 is too short in length to reach pin 16. Any ideas? Could I lengthen it by using any old copper wire? And does the connection have to be soldered?

[gIzzE]

pictures are far easier