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DP-4X POWER SUPPLY RELAY CONTROL EXPLANATION
Continued from Previous Page
See The DP-4X Power On and Off Circuit Diagram for details. (Page 01-16)
(5) RY105 DC (SW +5.7V) Supply to the Low Voltage Regulators Relay
When the set is turned on, the POWER DM command is supplied from pin 91 of the
Microprocessor I004. This high is sent to Q028 and Q029 then to the PPS1 connector
pin 12. From here this high goes to the Deflection PWB through R126 to the Base of
Q104. The Base goes high and the transistor turns on. This action supplies a ground
return for the coil inside RY105 and the relay turns on supplying SW 5.7V to the con-
nector PPS1 pins 25, 26 and 27. Then to the Signal PWB and on to the following Low
Voltage Regulators and ICs.
SIGNAL 5 of 5 DIAGRAM (AV Selector).
•
IY01 +3.3V Regulator.
◊
IY02 +5V Regulator.
◊
IY08 SW +5V Regulator.
◊
SIGNAL 4 of 5 DIAGRAM (3D Y/C)
•
IV01 +2.5V Regulator.
◊
SIGNAL 1 of 5 DIAGRAM (Micro).
•
I010 Bus Select Switch.
◊
I013 +3.3V Regulator.
◊
I006 AV Control IC
◊
I008 IR Blaster Select Switch.
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PAGE 01-15
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