Service manual

3.3.2 Power Management Functional Operation Error
First of all, disconnect the signal cables from the signal source.
(If a signal input is removed, the high voltage (HV) falles and the LED turns to ORANGE.)
Expected failure point
IC102, Q100 of MAIN PWB, Q966，Q967 on the
POWER PWB
The voltage falls.
Check the LED color.
Green
Unlit
Expected failure point
IC102，Q100，on the MAIN PWB, R110 o
r
LED101
Check whether the power save function is turned OFF at the OSM.
+215V is maintained.
State of ON setting State of OFF setting
Reset to ON and check +215V output voltage.
+215V is maintained.
The voltage falls to approx. 0V.
Check the output voltage at Pins 5 and 42 of IC102.
Output from IC102 in power save mode is LOW: Approx. 0V.
(HIGH in the ON mode: Approx. 5V)
LOW: Approx.0V
Expected failure point
IC102
Expected failure point
Q962, PC903, Q903, Q902 on the POWER PWB and peripheral circuits
HIGH
：
Approx. 5V
Check +215V output voltage (between GND and + electrode of C961 on the POWER PWB) and confirm
whether the volta
g
e falls a
pp
rox. 0V.
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