The elusive Indextron

[jr_tech]

I believe that the voltage shown on the schematic for pin 18 is incorrect. I measure close to zero... the only pin in that section (13-19) with much measurable voltage is pin 14, with about 4.8 volts.

jr

[JeremyAbel]

Originally Posted by jr_tech

I believe that the voltage shown on the schematic for pin 18 is incorrect. I measure close to zero... the only pin in that section (13-19) with much measurable voltage is pin 14, with about 4.8 volts.

jr

Another thing I'm noticing is that a lot of the signals shown in the oscilloscope screenshots are reading way low on my scope. Like the signal shape and frequency looks correct but the amplitude is often 10x lower than the service manual states. Like a signal that the manual says should be 0.2v p-p reads 20mV p-p on my scopes.

[Electronic M]

Originally Posted by JeremyAbel

Another thing I'm noticing is that a lot of the signals shown in the oscilloscope screenshots are reading way low on my scope. Like the signal shape and frequency looks correct but the amplitude is often 10x lower than the service manual states. Like a signal that the manual says should be 0.2v p-p reads 20mV p-p on my scopes.

Are you using a 1x or 10X scope probe?