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SynchroNet ES/2 Service Manual
ES/2 TEST SOFTWARE
TEST 15 : mach sel
This test requires the parallel machine connector dongle in order to read the resistors on the cable
selector input. The ES/2 sets the DC gain to 112 and reads the state of the MS1 and MS2 lines via
the tally latch. If these lines are not both low then the test fails. If they are both low then the DC gain
is set to a value of 120 and the state of MS1 and MS2 is checked. If these lines are now both high
then the test passes and following screen is displayed:
Checking machine cable selector
Test 15
Okay.. Press to continue >
If the test fails then the screen displays:
Machine Cable Selector
re-run >
circuitry failed
Press to continue >
In either case the DC gain is continually incremented until the continue key (key 4) is pressed to
allow the user to investigate the circuit further.
TEST 16 : tach dir
The parallel machine connector dongle is required for this test, in order to loop the FILMA and
FILMB outputs into the TACHA and TACHB inputs. The test dongle allows the ES/2 to switch the
TACHA signal between SONY_SER output and FILMA output using the servo relay. The servo
relay has to be switched on (connecting the SERVO_COM to the SERVO_NO) for this test to work.
This routine sets the film output and the tach input to bi-phase. It then toggles the film output’s
direction and checks that the tach direction read changes. If the tach direction does not match the
film direction the the following screen is displayed and the user is asked to re-run the test (key 3) or
continue with the next test (key 4).
Tach dir out to in
re-run >
failed (Bi-phase)
Press to continue >
The next test sets the film output and tach input to tach and direction. It again toggles the film
direction output and displays the following screen if the tach input does not match what was
expected.
Tach dir out to in
re-run >
failed (Tach+Dir)
Press to continue >
The software will then wait until the continue key (key 4) is pressed to enter the test select menu or
the re-run key (key 3) to restart the test from the beginning.
If the test passes the screen will show :
Checking Tach dir out to Tach dir in
Test 16
Okay.. Press to continue >
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