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Most likely a usb port is physically damaged or a piece of a usb plug is still in the jack. Seems like the repair shop would check that.
Not sure what that would have to do with an eeprom. Did they get it fixed for you?
Larry G
Yep, had factory training by GE to service those starting back in the 80's. The magnetron tube has a very powerful spiral magnetic field to rotate the electron emission across a sinewave shaped metal housing to generate a high power RF signal guaranteed to sunburn your skin. Power supplied to it...
If you wanted, the Sony will have a horizontal centering control somewhere (probably inside) that you could move the raster slightly left to hide it or adjust the horizontal width slightly wider. I bet your raster is real close to the edge of the phosphor and normally is overscanned slightly...
You're welcome. I still have that manual. I built the 50W amp on page 696 back in the 70's on a tube TV chassis and used it for like 20 years. Cost about $200 for parts back then. Wish I still had it but got tossed :(
Larry G
The service manual was easy to find online. Essentially you should have equal positive and negative power supplies with zero volts DC at the speaker contacts. Any failure causing imbalance will put a DC on the speaker line and make the relay open. The speaker contacts on the relay itself can...
The feedback circuit is always negative feedback based. The primary side circuit should supply all the power needed to initially power on, then as the secondary sample voltage comes up, the feedback
voltage will be returned to the primary to reduce power. That's power regulation in it's simplest...
It appears you now have two problems. Since the width of the line doesn't fill the entire screen, you have a problem in the horizontal deflection as well as no vertical deflection. I'm sorry to say, your board looks pretty scary with all the pulled foils and wire patches. If the damage to the...
First, if a piece of the ferrite core of the HV transformer broke and that's what you glued, then it should be ok. The core helps tune the transformer and having it physically together usually accomplishes the tuning. The vertical output IC is usually an inline IC (all pins in a single row) of...
Are the dvd's original or recorded copies ? Are they the same format as your TV ? NTSC and PAL are different formats, including horizontal scan rate.
Purchased movies have copyguard in the sync and if copied will quite often have sync problems.
I've attached a link for the TDA9367 pdf. Everything happens in that IC, video detection, the sync separation and the decision for PAL or NTSC. Does the video look ok, just rolling? Try cleaning very well the pins of the IC and the crystal leads, even removing crystal to clean if necessary...
Rolling down is usually one of two problems. Either the vertical sync is not getting to the main IC or the master oscillator is off frequency determined by the crystal next to it. That shiny metal can looks rusty in your photo? What is the part number on the main IC? Does the crystal have a...
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