I tried to solve this trouble,but still can't fix it.signal is present in pin 66,67,68 of I.C.TA1360AFG ABL circuit is normal. blanking circuit normal also.I'm wondering if theres something to do with service mode. Any one knows how to open the service mode for this model? Any comment will be very much appreciated.
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You have a CRT projection TV. There's no lamps in this that can be swapped out. The technology is very similar to a glass tube CRT TV.
If the picture disappeared but you still have sound then you haven't pressed the wrong input or pressed the picture mute because sound would go too. As a quick check, try any function (vol, contr, bri etc) that normally brings up an onscreen display. If that has gone too then it's a TV issue with the drives to the three tubes. If the OSD is still visible, then the problem is either a source signal issue (broken or disconnected cable; menu changed to affect the signal output of an external source) or the TV isn't processing the signal correctly.
For TV problems where something has broke, the answer is getting the TV repaired or replaced.
If you have OSD (on screen display) but no video or sound, you may have a problem with your video input switching or video processor. Either way this could require tracing the signal with an oscilloscope and could get expensive.
Can you please explain what you mean by an unstable signal? Without details, the problem can be anything from a weak signal being presented to the tuner to a defective tuner to poor signal processing later on. Also, check the picture and sound using different inputs to the set. If hte problem is the same regardless of hte input signal, that tells us that the problem is in the video signal processing circuitry. Also, place a menu on the screen. Is the instability present with the menu display?
if you can find this in your TV options I cut and pasted it from the manual, see the line with Closed caption settings see if yours matches, sorry about the formatting this furm post will not cut and paste properlyeach of the #'s below corosponds to the bold headings.
AAVL 1 1 1 1 1 Auto Volume Level via Sound Menu
ACS 0 0 0 1 0 Auto Convergence
AOUT 1 1 1 1 1 Audio Out
APC 1 1 1 1 1 Auto Picture Control
AV3 1 1 1 1 1 Side AV Source
AV5 0 1 1 1 1 (yes this is blank)
BNUM 1 1 1 1 1 Numerics Displayed in Menus
C169 1 1 NA 0 NA Compress 16:9 mode available
CBFL 1 1 1 1 1 Comb Filter Present
CCAP 1 1 1 1 1 Closed Caption
CFMU NA NA 1 1 1 Comb Filter Menu Item
I also found this with the word search but it makes no sense to me sorry...
The HDR2002 has two microprocessors. The Microprocessor, 7001, on the SSB monitors the Keyboard and the Remote sensor during standby. This IC controls the Tuner, Video switching on the SSB, generates the consumer OSD. Pin 5 of 7001 monitors the Keyboard for a voltage change to generate a command. The Front Detect line on Pin 6 monitors the AV inputs on the Side Jack panel. If a problem develops, the Front Detect will go Low, preventing 7001 from receiving any commands. The Power Fail input on Pin 79 goes High if the set looses power while the set is On. Composite Video is fed to Pin 31 for Closed Caption decoding. Horizontal and Vertical sync on Pins 53 and 55 synchronize the OSD and Closed Captions display signals, which are output on Pins 46, 47, and 48. Fast Blanking for the OSD is output on Pin 52 There are three I2C busses on 7001. The Bus on Pins 78, 80, and 97 communicates with the MemoryIC 7012. This IC stores Customer setup information, Option codes, and Error codes. I2C busses, Sand F communicate with the Tuner on the PIP panel, and the ICs on the SSB. The S bus also controlsthe Tuner on the SSM and the Audio and Video switching on the SSM. Data lines on Pins 16 and 17communicate with the Microprocessor on the ACS module.
BTW if you don’t plan on trying this and are going to throw out the TV, I still need a IC convergence board for a 51MP392H/17 TV I'm fixing, I'm willing to pay S/H and buy your IC board that’s not been tampered with. Edwinkraus@hotmail.com
Picture quality problems (such as lines, fuzzy image, or wrong colors)Check the cables and connections:
Make sure that cable connections are securely fastened to the connectors and try reaseating the connectors. If connecting a device using component cables, make sure all three color-coded cables are connected correctly into the corresponding connectors.
Check the condition and length of the cables. Cables that are longer than 3 meters (10 feet), become more susceptible to promoting signal degredation (small dots "sparkling" on the screen and image ghosting). Cables that have been bent or pinched may also cause picture quality problems. Replace the cable or try a different cable type. Press the CH button to display a different channel. Picture quality problems on a single channel or on all channels may be caused by the TV station signal (antenna) or the cable signal source.
Make sure that the image quality issue is not coming from your source signal. For example: if the image quality issues occur while viewing TV, switch the source to a DVD player to see if the image quality problems go away. If selecting a different input source (using the remote control) causes the problem to go away, troubleshoot the source device causing the problem - adjust aerial antennas, call the cable company for assistance, and . If a picture quality problem occurs on all sources, the TV or its settings may be the cause of the problem. NOTE: Higher resolution TVs will make it much easier to view signal problems coming from source signals - especially TV signals. For example, if your TV cable company experiences heavy load on their system, you may be able to detect small miscolored squares that briefly scatter across the screen (macro-blocking). On a smaller standard TV, this type of quality problem is much less noticeable on a standard TV, but can become very annoying when viewed with greater detail.
Open OSD to adjust the picture: Press the Menu button to open the OSD. Select the Picture menu and adjust the image as needed. If you cannot adjust the TV to fix the problem, reset the settings from the OSD to see if the problem goes away.
Unplug the TV from its power source. With the power cord unplugged, press and hold the power button for five seconds. Turn on the TV. If the image quality problems still exists across all types of signal sources, the TV should be serviced.
If this dosent solve your problem, letus know and we will find another solution, Dahaka
Good Day, marvy21; try theses ideas, they will fix the TV # 3 is most common, you might start there.
1). VERTICAL ROLLING, VERTICAL BLANKING BAR LOCKING IN THE MIDDLE OF THE PICTURE, ALSO MAY HAVE HORIZONTAL PULLING OR TEARING. CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB. 2). CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.2). CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.
3). CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB. Good Luck, big IRISH.
The lamp has to be lit for the OSD to be present. the video processor is likely where the problem lies. I would suggest one of the following circuits SD Ram Circuit, Scaler input and or Capture circuittry and quite possibly the light engine itself all though the light engine would be very last on the list.
It sound like the components are ok. Are any of the component leads
discolored from excessive heat? If so it may be that the resolder looks
ok but is not actually adhering to the lead. Use solder wick or a
desolder iron to remove the old solder, clean the lead(s) by scraping
with a sharp knife edge to bare good metal and resolder.
This problem is related to ABL control .
Trace ABL signal from Pin no 11 of flyback transformer.Mostlikely value for the resistor in abl line has gone high.First case reduse the G2 voltage and see if the unit works for long.
Second case its sure that its ABL problem.
When you say you have tried all the inputs you are not clear if you mean tuner, vcr, dvd, aux, etc. If you are talking about only the cable input it sounds like you have a bad tuner. To obtain picture in picture there are 2 tuners in your set. This would explain why the small picture is ok while the main picture is bad. You should be able to swap the signals (see your ops manual). Try this. If the snow moves the one tuner is bad. If you have put other signals in (besides cable)such as dvd then the problem is in the matrix circuitry where the two signals merge. Either problem should be easy for a good tech to solve and not cost a whole lot.