Pioneer SX-20-K Service Manual page 34

1
A
[3] The unit's operation when a error is detected
[Purpose]
• The unit's operation when a DC/OVER/TEMP/POWER error is detected is described here.
• How to cancel the status after detection of the DC and POWER errors are described here, because no key input will be
accepted after the DC or POWER error detection.
[How to enter/exit]
During Standby mode, simultaneously press and hold the [FM/AM] and [+/l] buttons for 2 seconds to enter this mode.
The display will return to the normal indication when no key operation is performed for 5 seconds.
[Basic operations]
B
3.1 DC (AMP is abnormality) error detection
Key Operation
(Normal display)
(DC detection)
(Auto)
(RECEIVER POWER OFF)
C
Processes when a DC (AMP abnormality) error is detected
The following processes will take place:
[1] Immediately after a DC error is detected, muting is turned ON and speaker relay is turned OFF.
[2] The DC error count is increased by 1.
[3] The DC circuit is monitored for 3 sec.
[3-1] If the circuit is normalized within 3 sec., the unit will return to a normal mode.
[3-2] If the circuit cannot be normalized within 3 sec., the unit will shut itself OFF.
[3-3] If a user turns the unit OFF within 3 sec. after the detection, it will be turned OFF.
[4] If the unit shuts itself OFF as mentioned in [3-2], you cannot turn it ON unless you perform the procedures described in
"How to cancel the status after detection of a DC or POWER PROTECTION error."
D
3.2 OVERLOAD (overcurrent) error detection
Key Operation
(Normal display)
(OVERLOAD detection)
(Auto)
(RECEIVER POWER OFF)
E
Processes when an OVERLOAD (overcurrent) error is detected
The following processes will take place:
[1] Immediately after an OVERLOAD (overcurrent) error is detected, muting is turned ON and speaker relay is turned OFF,
then the unit is turned OFF.
The processes of muting ON and speaker-relay OFF must be completed before the unit is turned OFF.
[2] The OVERLOAD (overcurrent) error count is increased by 1.
Key operations will not be prohibited even after detection of such an error. (The unit can be turned ON.)
F
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FL Display
S A C D / C D
S A C D / C D
FL Display
S A C D / C D
S A C D / C D
SX-20-K
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3
Time (sec.) Description of Indications
usually
Time (sec.) Description of Indications
usually
3
4
4