Daewoo DSJ-6000LN, Руководство по обслуживанию

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(2) MAIN Power Operation
(2-1) PWR SWITCH ON(HIGH) Signal is supplied from U-COM to the Base of Q804 via
P805M CONNECTOR, Positive Terminal Relay(Y801) is activated, then Starting
Voltage is supplied to the No.4 pin (Vin) of STR-F6656(IC802, IC803) via R836 and
R844.
(2-2) AC Power is rectified in the Bridge Diode(D801), and is applied to P winding of the
TRANS, and reaches 16V of TRANS Auxiliary Winding (No.7 pin), then Control
Circuit is active by the operation of Start Circuit.
(2-3) The winding voltage of the Auxiliary Winding (No.6 pin) is rectified, 18 V is upplied
to 1601(FA5332M) No. 3/16 pins, and the phase of Voltage/Current is compensated,
No.13 Pin Reference Voltage/No. 15 Pin OSC Timing C/R oscillates internally, and
mixed to AND Gate, passes to No.13 pin, and its voltage is elevated to DC380V
from L805 by FET Switching via Debias Stabilization Circuit (Q801/802). The
elevated 380V
is smoothed through Diode(D802), and is supplied to the Ballast via P804B.
(3) Specification of STR-F6656
STR-F6656 is the Hybrid IC for the power of Flyback Converter-type Switching where
Power MOSFET and IC for Control is installed. The characteristics of this IC are parts to
be added are just a few, and various protection functions such as Transient Current
Protection, Transient Voltage Protection, Overheat Protection), and has the Quasi-
Resonance function proper for miniaturization and standardization.
The detailed specifications of this IC is as follows.
Pin Number Symbol Name Function
1 OCP/F.B OCP/F.B OCP detection input and Feed Back
2 S Source MOS FET Source
3 D Drain MOS FET Drain
4 Vin Vin Control circuit voltage Input
5 GND GND Ground
Symbol Function
OVP Over voltage protect
TSD Over temperature protect
<Extra Function>