Sanyo AVM-2550S Training Manual page 40

PWM D/A
CPU Converter
Memory
(L.P.F)
R/C
Receiver
R/C
Transmitter
Conventional Bright Level Adjustment System
IC101 Signal Processor
BUS
IC801
IC802 Data
CPU
Memory
(C-003)
ALWAYS
5V
A1901
D843
R/C
Receiver
C829
R/C
Transmitter
Beam Current Detection Circuit
AVM-2780G Automatic Bright Level Adjustment System
Tuner
DC
Voltage
Signal
Processor
Sub-Bright Level
Control
A101
Special Signal
Tuner
Input
Brightness
BUS Contrast
Control
Interface Bright
Register
+B(130V)
R493
R494
D834
ABL
(18V)
R833
R491
C493
D836
R492
R831
D487
CRT
FBT
HV
CRT
T402
FBT
HV
– 37 –
Vcc
A/D Input Voltage at 0 beam current
57/128 Vcc
53/128 Vcc
49/128 Vcc
45/128 Vcc
5 steps (20/128 Vcc)
41/128 Vcc
37/128 Vcc
33/128 Vcc
29/128 Vcc
0 100
A/D Input Voltage
Standard Voltage: A
Reference Voltage for specified
beam current during FACTORY
PRESET mode
Suggested Beam Current for
12 IRE flat video signal input
during FACTORY PRESET mode
200
AVERAGE BEAM CURRENT ( µ A)