Tatung VM5ERDA Service Manual page 11

5-5 TRANSISTOR & DIODE CIRCUIT
LOCATION
D901 ~ D904
D910
D919
D922
D923
D925
D930
D927
D929
Q907, Q908
Q909, Q910
Q912, Q920
Q401
Q402
Q407, Q408
Q410, Q426
Q404, Q405
Q406
Q703
Q704, Q705
Q601, Q707
Q101
Q940
CIRCUIT FUNCTION DESCRIPTION
Bridge Rectifier for AC Source
Clamp Diode for Snubber CKT
Rectifier for Output Voltage
Rectifier for Output Voltage
Rectifier for Output Voltage
Rectifier for Output Voltage
Rectifier for Output Voltage
Forward Bias when Q403 Turn-off to Protect B+ Block CKT
B+ Feed Back Rectifier from F.B.T Pulse
Use for Off-Mode to Cut-off 6.3V Supply Voltage
Use for Standy-By or Suspend Mode to Cut-off 15V Supply Voltage
Push-Pull Topology to Drive Q911
Turn-on at Power ON/OFF and Change Mode to Protect Hor.Block
HOR. Driver Transistor
As a Switcher for H-Size Correction CKT
H-Size Corection Mosfet
As Differential Amp. to Drive Q406
Darlington Transistor for H-Size Control
As a Switcher to Mute Screen when Abnormal Qccurring
Unit Brightness Control CKT
Develop Blanking Signal
Use for 5V regulator
Use for 12V regulator