Pioneer SX-20-K, Service Manual

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35
SX-20-K
5 6 7 8
5 6 7 8
A
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D
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3.3 TEMP (AMP overheat) error detection
After a TEMP error is detected, the count of protection activation detections will be updated.
Key operations will not be prohibited even after the unit shuts itself OFF after detection of such an error.
(The unit can be turned ON.)
Counter: Temp
PORT: PROT_TEMP
Normal Operations
Deduct 3 from the current VOL
value. Have "TEMP" flashing
on the FL display for 3 sec.
POWER OFF (STBY)
*1
*1: The detection interval must be 1 sec or less.
Prohibit detection of
PROT_TEMP for 2 min.
Is PROT_TEMP
detected?
Is the VOL value 5
or less?
No
No
No
Yes
Yes
Yes
Detection of PROT_TEMP
is resumed after 2 min.
Is PROT_TEMP detected?
(Auto)
usually
Key Operation FL Display
(Normal display)
(POWER PROTECTION
detection)
Time (sec.) Description of Indications
Immediately after a POWER PROTECTION error is detected, muting is turned ON and speaker relay is turned OFF, then the
unit is turned OFF.
If the unit automatically shuts itself OFF after such an error is detected, no key input will be accepted afterward.
(The power will not be turned ON.)
To turn it on again, see “[4] How to cancel the status after detection of a DC or POWER PROTECTION error” below.
A S C D / C D
A S C D / C D
(RECEIVER POWER OFF)
3.4 POWER PROTECTION error detection
usually
Key Operation FL Display
(STANDBY state)
[FM/AM] + [+/

] buttons
(press and hold the keys for
2 seconds.)
Time (sec.) Description of Indications
Simultaneously holding the [FM/AM] and [+/

] keys for 2 seconds will cancel Key Input Inhibition mode after the DC or
POWER PROTECTION error detection and turn the unit ON.
[Detailed explanations]
A S C D / C D
(Normal display)
[4] How to cancel the status after detection of a DC or POWER PROTECTION error