Pioneer PRO-110FD Service Manual page 117

5
Power supply and DC-DC converter
Circuit configuration
POWER SUPPLY Unit
SW_REG
MAIN
POWER
SW
RELAY
MODULE_Ucom
DIGITAL ASSY
Specifications for port monitoring
Port Name SD/PD Indication
RST2 ASIC power
(M-DCDC)
RST3 AC power
RST4 MAIN power
(RELAY)
5
6
V+3.3V_UCOM
AC_DET
Inverter
V+12V
V+5.1V
PULL_U
PULL_D
V+6.5V
PULL_U
PULL_D
DC/DC Converter
Active Monitoring conditions
Shutdown occurs when the
• Panel ON (RST4 = H and
signal is "L."
PSW1 = L)
for 5 sec after PSW1 is ON.
• While awaiting restoration
or
of RST2 (RST2 = L)
for 2 sec while the unit is
ON.
AC_OFF when the signal is • Active STB (including SD/PD
statuses)
"H."
• Functional STB
• Panel ON
• (Areas other than North America)
While the main power switch is
set to OFF (M_SW_DET_B = H)
• (North America) While the main
power switch is set to OFF
(M_SW_DET_B = H)
• While awaiting restoration of AC
power (RST3 = H)
• While awaiting restoration of
RST2 (RST2 = L)
• While awaiting restoration of
RST4 (RST4 = L)
Shutdown occurs if the • Functional STB
• Panel ON
signal is "L."
• (Areas other than North America)
for 5 sec after RELAY is
While the main power switch is
ON.
set to OFF (M_SW_DET_B = H)
or
• While awaiting restoration of
for 2 sec while the unit is
RST2 (RST2 = L)
ON or in Functional STB.
• While awaiting restoration of
RST4 (RST4 = L)
PDP-5010FD
6
7
MAIN Assy
RST3
RST4
AND
V+5.1V
V+5V_USB
V+3.3V_D
PULL_U
Overvoltage
Detection
PULL_U
PULL_D
EMG_
USB
RST2
AND
EMG_DDC
PSW1
Command
The SD timer starts when "RST2 = L" is detected under
monitoring conditions. If "RST3 = H," "M_SW_DET_B = H," or
"RST4 = L" is detected, or if a power-down or shutdown in the
module microcomputer system is not generated, the unit waits
for 30 mS. Then, if the SD timer continues to count for 2 sec
or more, a shutdown is determined, and a shutdown process
starts. A specific LED flash pattern (blue LED, 13 times)
starts. The next PON operation is valid, and the flag is cleared
upon the next power-on.
If RST2 is H, a restoration process starts according to the
latest power-on/-off status.
If "RST3 = H" (AC_OFF) is detected under the
monitoring conditions, a power-off process starts.
Monitoring of the RST3 port is continued, while
monitoring of other ports is interrupted.
Communication is controlled only by the IF
microcomputer. The port outputs are set as specified.
If the signal at the RST3 port continues to be H after
30 mS of waiting, monitoring is continued.
If RST3 is L, a restoration process starts according to
the latest power-on/-off status.
The SD timer starts when "RST4 = L" (power-off of
devices in the functional STB system) is detected under
monitoring conditions.
The RST4 initialization process starts, and input
monitoring, communication setting, and output-terminal
setting are performed.
The RST4-SD timer starts. If either "RST3 = H" or
"M_SW_DET_B = H" is detected, or if a power-down or
shutdown in the module microcomputer system is not
generated, the unit waits for 30 mS. Then, if the SD
timer continues to count for 2 sec or more, a shutdown
is determined, and a shutdown process starts.
A specific LED flash pattern (blue LED, 13 times) starts.
The next PON operation is valid, and the flag is cleared
upon the next power-on.
If RST4 is H, a restoration process starts according to
the latest power-on/-off status.
7
8
MAIN_UCOM IF_UCOM
AC shutdown
detection
Voltage
detection
Startup
Main ucom
ACTIVE
Voltage
detection
DC_DC Converter
output control
PON/POFF
Command
Operation
8
A
B
C
D
E
F
77