11 Self Diagnosis Display Function
This unit is equipped with the self diagnosis display function, which alarms faulty operation with error code. Use this function during
servicing.
11.1. Automatically Displayed Error Codes
An error code automatically appears on the display (FXX) when faulty operation is detected. Refer to Fig. 11.1. For error codes,
refer to Section 11.2.
<Fig.11.1>
11.2. Error Code Display Details
Refer to the following table for error codes.
FL Display
Symptom
Cause and Remedy
OVERLOAD
Speaker short, amplifier failure.
Speaker short and failure in power
amplifier, pre-amplifier circuits. Check for
faulty parts and replace with new parts if
necessary.
Humidity protection activated.
FAN LOCK
The fan stops suddenly.
Failure in fan or fan control circuits. Check
for faulty parts and replace with new parts
if necessary.
F70
Communication error between sub micro
processor and its peripheral LSI
Failure sub-micro processor and its
peripherals LSI. Check for faulty aprts and
replace with new parts if necessary.
F76
When the power is turned on, the unit
power autimatically turns off, the power
cannot be turned on.
Failure in the power circuit system of the
unit. This may happen when the direct
current electricity is supplied to speaker
terminals. Check for the above and replace
with new parts if necessary.
11.3. Activating Self Diagnosis Function (Doctor Mode)
This mode can be used during servicing.
1. With the following operation, the processing of this mode begins.
·
Press and hold down the “INPUT SELECTOR” button and the “HARMONIC BASS” button, and then press the “POWER”
button at the same time.
* At this time, initialize all setting and set the following frequency to Tuner. FL display will display “_DOCTOR_” for 3
seconds.
E1: 99.7 MHz, E2/3: 93.40 MHz, JAPAN: 87.8 MHz
* The display is always blinked with 1Hz cycle to indicate that DOCTOR MODE is activated.
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SA-HT17PP
