Power Supply Section; Block Diagram Of Power Supply Section - Canon BJC-55 Service Bulletin

BJC-50

4.3 Power Supply Section

4.3.1 Block diagram of power supply section

AC Universal Adapter
Protective Circuit
Fuse (4.0A)
CNBT
Lithium Ion
Battery
10-14.3Vdc
Shutdown
Control Circuit
NMI
Connector
13.5 Vdc
Noise
Filter
Recharge
Circuit
CHG- ON
Battery
P85 LPC 0 V2
ON
A S I C ( I C 6 )
Vcc PWRON
Vcc1
Power button
Figure 4-28 Block Diagram of Power Supply Section
CNDC 1
Vpp Output
Supply the power to motor and beeper
Step-down
Transformer
DC/DC
Converter
V2- ON
Vcc2, Vcc3
ON/OFF
Circuit
V3- ON
Step-up Transformer
VH- ON
DC/DC
Converter
Reset Circuit
Voltage Level
Detection
V3 VHON DC RESET
ON LEV
4-39
Part 4: Technical Reference
Vcc 1 Output
(5.1±0.25Vdc)
Vcc 2 Output
(5.0±0.25Vdc)
Vcc 3 Output
(5.0±0.25Vdc)
VH Output
(24.12±0.35Vdc)