Pioneer SX-20-K Service Manual page 35

5
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.)
3.4 POWER PROTECTION error detection
Key Operation
(Normal display)
(POWER PROTECTION
detection)
(Auto)
(RECEIVER POWER OFF)
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.
[4] How to cancel the status after detection of a DC or POWER PROTECTION error
Key Operation
(STANDBY state)
[FM/AM] + [+/] buttons
(press and hold the keys for
2 seconds.)
(Normal display)
[Detailed explanations]
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.
5
6
Counter: Temp
Normal Operations
Is PROT_TEMP
detected?
Yes
Is the VOL value 5
or less?
No
Deduct 3 from the current VOL
value. Have "TEMP" flashing
on the FL display for 3 sec.
Prohibit detection of
PROT_TEMP for 2 min.
Detection of PROT_TEMP
No
is resumed after 2 min.
Is PROT_TEMP detected?
FL Display
S A C D / C D
S A C D / C D
FL Display
S A C D / C D
SX-20-K
6
7
PORT: PROT_TEMP
*1: The detection interval must be 1 sec or less.
*1
No
Yes
POWER OFF (STBY)
Yes
Time (sec.) Description of Indications
usually
Time (sec.) Description of Indications
usually
7
8
A
B
C
D
E
F
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