Transistor & Diode Circuit - HP D8904 Service Manual

5-3 TRANSISTOR & DIODE CIRCUIT
LOCATION
D901 ~ D904
D910
D918, D919
D922
D923
D925
D929
Q901
Q907, Q908
Q909, Q910
Q912, Q920
Q913
Q921
Q401
Q402
Q407, Q408
Q426
Q404, Q405
Q406
Q703
Q704, Q705
Q601
Q740 ~ Q742
Q821 ~ Q823,
Q830 ~ Q832
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 B+ Supply
B+ Feed Back Rectifier from F.B.T Pulse
MOS FET for Switching Power Control.
Use for Off-Mode to Cut-off 6.3V Supply Voltage
Use for Standy-By or Suspend Mode to Cut-off 14V Supply Voltage
Push-Pull Topology to Drive Q911
Degaussing Switcher Transistor
5V Regulator Transistor
Turn-on at Power ON/OFF and Change Mode to Protect Hor.Block
HOR. Driver Transistor
As a Switcher for Horizontal S Correction CKT
Horizontal s correction control MOSFET
As Differential Amp. to Drive Q406
Transistor for H-Size Control
As a Switcher to Mute Screen
Brightness Control CKT
Blanking Signal output transistor
V-Dynamic focus CKT
Video DC Restoration control transistor