I have an 8 year old 35" Sony Trinitron that offers a challenge for all you brilliant folks - to repair or not to repair.
With little notice, my Sony's picture has decided to fail. When I turn it on, I'll three thin colored horizontal lines across the top of the screen and then the picture will keystone in the top half of the screen. The image is fuzzy, with many horizontal lines visible across the image. Sometimes (after a 10 seconds or so), I'll get a full screen image. But inevitably, it won't hold and the screen turns black. And when I say black, I don't mean nothing - it is an illuminated black.
Following some message boards on the internet, I tried cleaning the dust on the boards and turing the 2 knobs on the inside (picture and scroll?). They seemed to do nothing, but maybe by coincidence I was able to get an image that held for the duration of the Bears game. Maybe I did something, or maybe it was an NFL miracle. However, in the morning I realized my luck was limited and I agail have full failure.
I have read about the auto kine bias, or AKB, failures in Sony Trinitrons. Would this be very expensive to repair/replace? I'm looking for sound advice on whether I should keep my repair appointment (minimum $200 charge) or just dump the boat anchor. If you know how to fix it, it would also be appreciated.
THANKS!!!
Well my freind, it is 8 years old and yes was a very expensive set. It sounds as though you have a problem in the pincussion correction circuit. It could be a simple solder connection as thats a very big issue with sets of this age. Beleive you me, once this connection is fixed, there will be more. If you do have this set repaired, be ready to start having to drop in more money every so often and it wont be the techs fault, but tVs do wear down, and anything can be repair and fixed, but there is a line you dont want to cross. In my opinion, its time for a early holiday gift. I think you should read this. http://www.techlore.com/article/10602/How-to-Determine-if-you-Should-Repair-a-Broken-Device/ Good luck and please let us know what you decided to do.
Here are the blinking codes I found online here. I've also found that you can order a complete G Board (power supply) part no. A1316399A for the KV-35S42 at www.tritronicsinc.com for $116.25. Something to think about if you KNOW the problem is on that board.
Unit is dead, No blinks - Problem in the standby power section. Might check fuse, R607, Q601, IC601, R612 and VDR601 (should show open).
Continuous blink once a second, no pausing - No reply from the jungle IC301 (data bus is busy, shorted to ground, or held high), IK video path is defective. I have found no such part in the Service Manual for KV-35S42.
One blink - not used for the self-diagnosis
Two blinks - B+ over current protection (OCP), the unit goes into standby mode then displays the 2 blink fault. This could be a short in the power supply of any of the circuits.
Three blinks - B+ over voltage protection (OVP), the unit goes into standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672.
Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505
Five blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly.
Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206.
Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
Eight blinks - Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code. Check IC406 audio amp, PS401, and 402. On some projection models of Sony TV sets, this code means that T8005 (fly back transformer), or the associative components in the high voltage circuits are defective on the D board.
Nine blinks - Replace D 6116 and D 6301 on the "G" board, do not resolder as this will fix the problem temporary. This could also be a Panel Module Error or Thermal Error. If it is intermittent 9 blinks, meaning sometimes the TV comes on and other times you get flashing, then change the switching regulator on the "G" board or check connections. Make sure the regulator is -12 or -13 (negative).
Ten blinks - Check Q8014 and Q8013 for shorts, leakage, or bad solder connections on the "D" board. If the transistors are bad, check R8051 and IC8005, also on the "D" board.
you can contact ptscorp.com and see how much they charge to rework the board for you.
I wish to thank Kevin Cook for his appraisal and problem-solving solutions listed for resolving the STANDBY lock-up problems with Sony TV's. In my case, the seven blinks from the diode light suggested my problem--I had too many circuits connected to a single outlet. Mr. Cook, you saved me a lot of anguish and expense, and I thank you wholeheartedly! KL
Mr. Lyons you are very welcome sir. I've always enjoyed this site for that very reason. People helping people ... not so corny when something happens to us and we need help BADLY.
Hats off to Tech-Lore as well.
Take care my friend. KC
I have continuous blinks, clicks like it is going to turn on, then no picture or sound. The "stereo" light under "stand by" also lights up but steady. I have tried the various reset maneuvers but nothing working. Any ideas?