JVC 330 Service Manual page 20

Chapter 2—Functional Descriptions
2. +24V Standby and Arc Lamp power supplies turn on.
3. When Arc Lamp lights (run voltage sensed by a window comparator in the
SPS), SPS pulls /LAMPLIT line low.
4. SCB senses /LAMPLIT low and awaits further instructions.
Electronics only power-up:
1. Upon receipt of Electronics-On command, SCB pulls /FANENBL and
/LVPSNBL lines low.
2. +24V Standby and Low voltage supplies turn on.
3. SCB senses +5V supply at correct level and enters normal program
sequence, lamp can be turned on at any time.
Table 2-1 System Power Supply Voltage Distribution
F
HV
Voltage a
PS
n
+5v
+5v Stb
+6.3v
+15v
-15v
+24v
+24v Stb
+48v
+107v
+170v
2–8
CRT SCB HDB
Model 330, 340SC, and 370SC Service Manual
VDB VPB RTG
Arc
VAB Lamp/
Ignitor