akira 21WHBN, Service Manual

Page: 10 / 20

10
Model No: 21WHS3BN
Version 1.0
Power supply
The IC of KA5Q0765RT is adapted in this chassis; it is the product of Fairchild. It supplies four DC
voltages, one is the +B
＝
110V, another is Hcc
＝
26V, the third is 13V (the sound drive voltage), the
fourth is +16V. The +16V can generate the +8V. The fifth is +12V, it generate the +5V and +3.3V by
the special generators.
Fig.1 The power supplies illustration
L501
L503
VD503
VD504
VD505
VD506 C507
N501
T501
N504
VD543
VD522
+13V To N101
+26V To V450, T450
+12V To N505
VD47
VD47
VD470
+190V To CRT
+15V To Pin 2 of N401
-15V To Pin 4 of N401
+5V
R561
VD564
Pin 1 of N301 is high level V504 is ON
+3.3V To
+8V
VD524
R480
HEARTER VOLTAGE
+12 V542 N503
AC 22V DC VD52