Toshiba 28YT56, Service Manual

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2.2.4.2 SECONDARY BLOCK
Switching primary winding of SMT induces voltages to secondary windings of SMT. Induced
voltages are then rectified by secondary recitification diodes and capacitors.
Secondary block consist of following main parts,
Optocoupler for feedback (IC805),
Shunt Requlator for Requlation at Normal Mode (IC806),
B+ Sense Resistors for Apply Shunt Requlator (R833, R834, VR800, R831),
Rectifier and DC line Components for B+ (D817, C827, C828, C826, L805, D811, R867),
B+ Over Current Sense Components (R837,C840,R850, R838, Q806, R851, R853, C850,D813),
Audio + and - Supply Rectifiers and DC line Components (D818,C829, C831, R839, C841, D820, C830,
C832, R840, C842)
+ 14 Supply Rectifiers and DC line Components (D819, C833,C843),
+ 8V Supply Rectifiers and DC line Components (D808, C834, C844),
+ 8V Controller Supply Rectifiers and DC line Components at
Normal Mode (D809,C836),
+ 8V Controller Supply Rectifiers and DC line Components at
Stand by Mode (IC802, L804, R847,
D822),
IC 415 (Tristor) Trigering components (R848, C849),
IC 415 (Tristor) Trigering Control Components (C848, R849, Q810, R846),
Short Circuit Sense For +5V (R862, R863, Q813, R861, D815 ),
Power Fail or Short Circuit Inform Circuit to Controller (R859, R860, C851, Q812),
SMT secondary voltages / currents;