Panel And Button Control Circuits - Cambridge Audio Azur 752BD Service Manual

Section VI Panel and button control circuits
3.6.1: Block diagram of panel circuit:
VDD
Receiver
module
3.7.1 Block diagram of power supply circuit is shown in figure 3.7.1.1:
B1
KBP206G
Overvoltage
protection
HOST GND
circuit
Power system
filter
Power-off
control
circuit
Power socket
16
FLAC1
FLAC2
VFD
power supply
circuit
GRID1~12
FL-24V
Reset
REST#
circuit
Q1C12
VFD_OFF
KEY_L/P/U KEY_R_D
Press
OPEN_KEY STBY_KEY
button
IR_FP_IN
Figure 3.6.1.1 Block diagram of panel
Section 7 Power supply circuit
Absorbing
circuit
HOST GND
NCP1271P65
Switching IC
FB
HOST GND
Figure 3.7.1.1 Block diagram of power circuit
VFD
SEG1~35
VDATA
VSTB
Pt6302
VCLK
MCU_ISP_SDA
MCU
MCU_ISP_SCL
IR_MCU
Remote
input and
output circuit
Rectifying
Rectifying
Rectifying
Rectifying
MOS tube
Rectifying
Opto-
coupler
-14-
Mt8580
Filtering
Filtering
Filtering
Filtering
Filtering
Sampling
LM 431A
circuit
-15VAU
+15VAU
+15VBD
+5V