Processing In Abnormality - Pioneer PRO-110FD Service Manual

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5.6.3 PROCESSING IN ABNORMALITY

A
Protection of the Power Amplifier
Circuit configuration
TANSHI Assy
B
Specifications for port monitoring
Port Name SD/PD Indication
A_NG_B AUDIO
OTW AUDIO
Operation specifications of the main CPU
(1) When a shutdown decision is made 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.
C
• Example of a warning indication: "The speaker terminals are short-circuited. After reconnection, turn the unit on again."
(For 50-inch models) (For 42-inch models, an indication declaring a forced power-off is displayed.)
(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.
Conditions for resetting the circuits
The circuits will be reset upon Standby ON/OFF.
D
E
F
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1
2
OTW
DIGITAL
POWER
A_NG_B
AMP IC
Active
Shutdown occurs when the signal is "L."
30 mS ∗ 3 times
Shutdown occurs when the signal is "L."
130 mS ∗ 3 times
PDP-5010FD
2
3
MAIN Assy
OTW
A_NG_B
PULL_D PULL_D
Monitoring conditions
RST4 = "H" (always)
The main CPU operations described below will be
(Monitoring starts 2 sec
performed when either "A_NG_B = L" or "OTW = L" is
after the above conditions
detected (established) under the monitoring conditions.
are established.)
3
4
IF_UCOM
MAIN_UCOM
Operation
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