Question about Philips 60PP9352 60" Rear Projection Television
I have put this unit on a color bar gen. The tint has no control at all, I have checked all connections to no avail. I would appreciate any help in this matter.
The first thing that comes to mind is that the coolant needs replacement in the CRTs especially the blue and the green. remove the rear panel and while the set is playing look directly into the lens of the Blue and the Green CRTs. You will notice right away if the coolant is comgealed or has bacterial growth in it. The red is hardly ever affected. My quess is that the coolant will need replacement.
Posted on Jan 22, 2009
This is a rear projection CRT TV, on this kind of set a convergence problem can easily be confused with RGB gain problem.
If you cannot set up RGB using color bar generation, ensure that all CRTs are working, and test the STKs and pico fuses on the convergence board.
If convergence and CRTs are OK, then test RGB circuit.
Posted on Jan 21, 2009
Either can be the effect of the magnetic field causing this.this mostly causes if its placed near to any such electronic device thats breaking the megnetic effect on the tv screen.keep it away from all the other electronic devices for two three hours and then check.keep the tv on for that 2-3 hoursbut away from the devices.
if that does noit solves the problem.then it could be the inner main circuit board problem.the stk ic must be checked and replaced.
Posted on Jan 20, 2009
I do not have schematics of this TV, Philips, 60PP9352 but what comes to mind, does TV show green tint in Color or in gray scale picture (colors off)
If TV gives green tint in colors, then it can be problem of Burst signal, reference signal from fly-back (H-pulse) in color decoding circuit.
If green tint in gray-scale (colors off, black n white) then its problem of white balance adjustment. Requires RGB gain adjustment.
I need service manual or exact model number of this TV to go further in diagnosis.
Posted on Jan 20, 2009
I will say that you probably still have the clear liquid (Glycol) still on the board. I recommend cleaning with a degreaser spray and brush it off with a clean 1inch paint brush. You can get the spray at Radio Shack The glycol is hard to remove and is conductive to electricity.
Posted on Jan 20, 2009
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Posted on Jan 02, 2017
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You have a problem with the three factors, and they are screen voltage, focus voltage, and control (focus 2) voltage. Basically these voltages have to be adjusted since the components in this section have aged some. These controls are usually located in the television on the IHVT (Integrated High Voltage Transformer) or as it is also called the flyback transformer. these controls must be adjusted together, along with the color controls. Here is how the adjustment is done (You will need a schematic diagram, a DC volt meter, and a color bar generator to do these measurments):
1) turn color and tint fully counter clockwise until you have a black and white picture.
2) connect the color bar generator to the TV (ch 3) and turn it on, you should see bars in various shades of gray
3) adjust as best as possible the color and tint controls to obtain the color bars on the screen Red Green Blue.
4) measure the voltages on the focus, screen and control grids of the CRT and match them to the schematic digram measurements.
5) adjust the focus screen and control grids to match the ones on the schematic diagram
6) once this is done then you adjust the color controls once again to obtain the red green and blue bars on the TV screen.
This should help if the CRT (picture tube) electron guns are still good and if the flyback transformer voltage supply is working.
However if you do not have a background in electronics please take the TV to a shop for repairs.
I hope this helps,
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