Rf/Servo Circuit - NAD T 751 Service Manual

5. RF/Servo Circuit

A.
CHECK POINT(General)
Does signal goes
"High" to IC201 Pin194 when the
power is on?
YES
Does signal pulse
input to IC201 Pins 58, 59 when
the power is on?
YES
Does
TTL pulse output to
IC201 Pins 140, 142?
YES
Is IC201
Pins 83, 84, 88, 89 voltage
about 2.2V?
YES
END
NO
NO
Check "2.PANTERA Part".
NO
33.8688MHz clock input
to IC201 Pin 63?
YES
Replace IC201
(IC206 soldering or IC defect).
NO
Check power circuit.
Does
NO
3-8
Replace X201 or IC206
(30MHz clock defect)