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It has all the information you will need to fix it. The main circuit diagram is only A4 but being a PDF, you can print it to any size - I did it on two sheets of A3 and it didnt lose any detail - just made it readable when pinned up above the bench. I've found the fault, just need to buy some obscure bits to get it going again!
I cant fault the process, I paid for the manual in the morning and it was ready to download by lunch time.
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Very good copy in a 54 pages PDF archive. This is my sixth purchase here. :)
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Another excellent buy! File too clear and explanatory.
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A manual hard to find. It was very helpful to restore my device.
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I am very grateful for this manual. Without it could not repair my receiver.
voltage, and +5 volts. The EHTINFO line is the DAG line. This line is fed back to the Signal Processor IC, 7250, to adjust the Picture level to compensate for changes in Beam Current. The EHTINFO line is also connected to resistor 3478 and zener diode 6480. If this line should go excessively negative, which would be caused by excessive Beam Current, transistor 7481 will turn On. This will place a High on the P9STBYON_PROT line shutting the set Off. The Filament voltage is monitored for no voltage or excessive voltage. The Filament voltage is rectified by 6463 and fed to the base of transistor 7462. If the voltage on the base of 7462 goes above 6.8 volts, 7462 will turn On, turning 7463 On. This
will place a High on the HEW_PROT line. This will shut the Horizontal drive Off. The EW_DRIVE from the Signal Processor drives transistor 7470 to make linearity corrections in the Horizontal Drive. If Horizontal drive should fail, the source leg of 7470 will go High, placing a High on the P9STBYON_PROT line shutting the set down. MICROPROCESSOR SWITCHING 6) (Figure
In the Standby mode, Pin 19 of the Microprocessor, 7600, is held Low by a switching circuit inside the IC. When Set is turned On, this circuit switches
FIGURE 6 - MICROPROCESSOR
PAGE 10
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