Details Of Parts - Sony VPL-PX20 Service Manual

3-12-6. Details of Parts

R2139, R2140 Resistors for protecting the main and standby converters. When a problem occurs in
the later stage circuit, the line is opened to protect other parts.
IC2102 Control IC of the sub converter. Comes in the same package as the PWM control IC
and 700V MOS-FET.
T2102 Switching regulator transformer for the sub-converter. As it is of the flyback type,
the secondary side goes OFF when the primary side is ON, and vice versa.
D2118, D2121 Snubber circuit of the sub converter. The noise is suppressed by the switching pulse
of the sub converter.
IC2101 PWM control IC of the main converter.
T2100 Switching regulator transformer for the main converter. As it is of the forward type,
when the primary side is ON, the secondary side also turns ON, and when the
primary side is OFF, the secondary side also goes OFF.
R2145, R2146, R2147, C2121, D2119
Reset circuit of the main converter. Snubber circuit which consumes the exciting
current accumulated in the primary coil of T2100 for every switching pulse.
D2124, D2134, S2135, D2136, D2137, D2138, D2139, D2127, D2129, D2132, D2128, D2130, D2131
Diode for the secondary rectification of the main converter.
L2105, L2106, L2107, L2108, L2101, L2109, L2102, L2103
Choke coil for the main converter.
VPL-PX20/PX30
3-21