Sanyo DP50741, Service Manual

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DP50710-00 / 01
p#3
DP50740-00 / 02 / 03 & DP50741-01
11/04/10
SMPS & Digital Processor
Apply power to the SMPS. No cables attached to SMPS or Digital
Bd., except cable from D25 to P25.
These voltages should be present:
Connector:
P2
p1 191.2 P7 p1 5.0 P25 p1 15.5
p2 p2 p2 15.5
p3 p3
P6 p1 15.5 p4 p4
p2 15.5 p5 p5 5.0
p3 p6 p6
p4 p7 p7
p5 p8 p8
p6 p9 p9 3.0
p7 p10 p10
p8 p11
p9 P35 p1 55.5
p10 P11 p1 191.2 p2 55.5
p11 p2 p3
p3 15.5 p4
IF YOU BELIEVE THE SMPS IS DEFECTIVE
The SMPS can be checked, but all cables & flat ribbons from the SMPS & Digital Processor PCB
must be unplugged. The only exception is the cable from D25 (D Bd.) to P25 (SMPS) must be
connected. With everything disconnected except this one cable, and when power is applied to
the SMPS, the SMPS should turn ON.
If the SMPS is working OK, please reconnect all connectors to the SMPS & Digital Processor. If
one of the other PCBs is defective, it is possible to damage the SMPS, w/o the flat ribbons
connected to the Digital Processor.