AMPEX MM 1200 and MM 1100 - Low Repro or Sync Audio or Distortion on all tracks...


Let's Fix it !!!


If you have GLOBAL bad or very Low Audio in the Reproduce and Sync modes
the likely culpret is one of three things...

1) Bad Power... 
	Go Check the Power Supply Voltages at the rear of the machine
	if bad... you will need to fix it.  I HIGHLY suggest hiring a good
	Tech to fix any Power Supply problems you have !!!
	
2) Bad BIAS
	You will need to check the Frequency of the Bias and the 
	Quality of the bias signal... 
	
3) Bad Speed EQ Control Signals
	Often one or both of the Speed EQ command transistors goes bad
	and you will lose the EQ Command Signals, meaning the EQ for a 
	speed will be OFF and thus not work.... check to see if the machine works fine
	in the second speed but not in the first speed.... though it is possible
	that BOTH speed EQ commands are bad...
	
	The Speed EQ Command lines are on the Transport Card.
	Look in your Manual for the EQ Command Drive Transistors, and check that they 
	turn ON and Off when the speed is changed.  If one transistor does NOT switch,
	change that transistor.

	
			



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