ViewSonic N3260wM, Service Manual

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4. Circuit Description
Power Circuit:
Switching mode power supply provided 3 sets of Vcc power 5V, +12V and +24V. The
Details please refer to page 26 of schematic.
Vcc +5V : supply to Stand-By U48 chip and Main Board or Panel LVDS .
Vcc +12V : supply to Audio Processor, Audio Class-D AMP or Panel LVDS.
Vcc +24V : supply to Panel’s inverter.
A.
Cold-Opening Mode
：
i.
Switching power will p5V when plug in and transmit to the Vsub pin of Stand-By U48 chip
via J17.
ii.
This machine is in Stand-By Mode now.
B.
Stand-By Mode(+5V)
：
i. When this machine is in Stand-By mode, only U48 SM5964C40J keep working, so the system can
assure the consumption power is < 1.0W in Stand-by Mode.
C. Power ON Mode(+5V ,+12V)
i. Receives the start order
When the system receives the start order by Power Key of the remote control
（
signal mark IRup
）
or Power ON/OFF of the control panel
（
signal mark PWSW
）
, it will process the following action.
ViewSonic Corporation Confidential - Do Not Copy N3260w_N3760w
N4060w
10