Hitachi 61HDX98B Service Manual page 77

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R-SW (R-Rear) '>(I1 aw
Center dI
$-Se1 t (NTS~)~~-------
1
WARNING:
All analog signals between DM-1 and PTV Chassis are differential
outputs. All signals except
"data communications"
have matching "reference"
output.
To measure, hook scope probe to convenient
ground and measure signal. The "reference"
for any given signal is the same but 180 degrees out of phase.
Always consult the schematic for the actual pin number of the desired signal. Connecting
the ground clip of
a grounded
scope to the REF line will cause damage to components.
PAGE 02-06
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