Pioneer KRP-500P - [3] PROCESSING IN ABNORMALITY

67
KRP-500P
5
6 7 8
5
6 7 8
A
B
C
D
E
F
Specifications for port monitoring
Port Name SD/PD Indication Determination Condition
DC_IN PA NEL MAIN power
(MB-POW)
If the signal to DC IN does not become H
within 5 seconds after the PON command
is issued, the unit will shut itself off.
Monitoring conditions
• During panel screen ON
Operation
Shutdown occurs immediately
Blue LED flashes 13 times
Power supply
SW_REG
MAIN
POWER
SW
MODULE_Ucom
Inverter
DC_IN
AC_DET_B
AC shutdown
detection
Voltage
detection
PON/POFF
Command
Command
MAIN_UCOM
POWER SUPPLY Unit
DIGITAL ASSY
MAIN Assy
Circuit configuration
V+3_4V_STB_MAIN
AC_DET
RELAY1
V+6_5V
PULL_D
PULL_U
[3] PROCESSING IN ABNORMALITY
Specifications for port monitoring
Operation specifications of the main CPU
Conditions for resetting the circuits
Port Name SD/PD Indication Determination Condition
A_NG_B AUDIO
Shutdown occurs when the signal is "L."
30 mS ∗ 10 times
OTW AUDIO
Shutdown occurs when the signal is "L."
120 mS ∗ 3 times
Monitoring conditions
DC_IN = "H" (always)
(Monitoring starts 2 sec
after the above conditions
are established.)
Operation
The main CPU operations described below will be
performed when either "A_NG_B = L" or "OTW = L" is
detected (established) under the monitoring conditions.
Speaker short-circuit
A_NG_BA_NG_B
PULL_D
OTWOTW
MAIN Assy
AUDIO Assy
(1) Establish the short-circuit of the speaker by the main CPU
• After a warning indication is displayed for 5 sec, a shutdown is generated (the blue LED flashes 5 times).
• A warning indication is displayed for all input-signal types.
• Example of a warning indication: "The speaker terminals are short-circuited. After reconnection, turn the unit on again."
(2) Display conditions
When the panel is on: A warning indication is displayed immediately.
When the panel is off: A warning indication is not displayed immediately but is displayed when the panel is turned on.
Note: A warning indication is displayed each time the panel is turned on if the conditions for a shutdown persist.
The circuits will be reset upon Standby ON/OFF.
PA NEL_
MAIN_UCOM
DIGITAL
POWER
AMP IC
Circuit configuration
PULL_D