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.)
Check +215V output voltage (between GND and + electrode of C961 on the POWER PWB) and confirm
whether the voltage falls approx. 0V.
Expected failure point
IC102 or Q100 of MAIN PWB, or Q966 or Q967
on the POWER PWB
The voltage falls.
Check the LED color.
Green
Unlit
Expected failure point
IC102
,
Q100
,
R110 or LED101
on the MAIN PWB
Check whether the power save function is turned OFF with 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 or Q902 on the POWER PWB, or peripheral circuits
HIGH
:
Approx. 5V
3-15
Summary of Contents for DPro2070SB
Page 22: ...1 15 Fig 7 The principle of DDCC compensation ...
Page 23: ...1 16 Fig 8 a DDCC adjustment item ...
Page 24: ...1 17 Fig 8 b DDCC adjustment item ...
Page 25: ...1 18 Fig 9 DDCC circuit diagram ...
Page 103: ...4 Wave form 1 POWER 2 CONTROL MAIN 3 DEFL MAIN 4 DEFL SUB COIL DRIVE MAIN 5 VIDEO ...