Service Manual - AMS Neve

SynchroNet ES/2 Service Manual
ES/2 TEST SOFTWARE
The ES/2 will then set the film direction to backwards and repeat the above test. If this test fails then
the following screen is displayed :
Tach divider output wrong re-run >
(reverse) Press to continue >
Pressing the re-run key (key 3) now will re-run the whole tach divider test, pressing the continue key
(key 4) will enter the test select menu. If the test passes then the screen will display:
TEST 19 : setup
Checking Tach divider accuracy
Test 18 Okay.. Press to continue >
This test has 4 parts to it and allows the test engineer to set up the tach and servo phase locked
loops. It also prompt the test engineer to record the value of DCout when DC gain and DC offset are
set to standard values.
On running this test the ES/2 will display the following screen:
Setup the servo phase locked loop
Test 19 Press to continue >
The 1.12 sets the servo generator to 400Hz and waits until the okay key (key 4) is pressed. The test
engineer can then set up the servo phase locked loop for minimum jitter.
Pressing the continue key (key 4) allows the engineer to set up the 5x tach phase locked loop. The
parallel machine connector dongle is required for this test. The ES/2 sets the film output to tach and
direction, enables and starts the film output. The tach circuitry is set to tach and direction, and the
divider is enabled and set to 7. Tach interrupts are enabled and the ES/2 waits for the user to press
the continue key displaying the following:
Setup the 5x tach phase lock loop
Press to continue >
When the user presses the continue key (key 4) the ES/2 disables tach interrupts, sets the DC gain
to 0 and the DC offset to 128. The DCout signal should be 0V plus errors due to component
tolerances. The screen shows:
Check the DC offset
Press to continue >
When the user presses the continue key (key 4) the ES/2 sets the DC gain to 128 and the offset to 0.
The DC out should be close to the -12V rail. The following screen is displayed:
Check the DC gain
Press to continue >
Pressing the continue key returns to the test select screen.
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