![background image](http://html.mh-extra.com/html/panasonic/sa-xr700eg/sa-xr700eg_service-manual_276419021.webp)
6 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.
6.1. Automatically Displayed Error Codes
An error code automatically appears on the display (LCD) when faulty operation is detected. Refer to Fig. 6.1.
Fig. 6.1
6.2. Display Details
Refer to the following table.
LCD 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
F70
Communication error between sub micro-
processor and its peripheral LSI
Failure sub-micro processor and its
peripherals LSI. Check for faulty parts and
replace with new parts if necessary.
F76
When the power is turned on, the unit
power automatically 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.
6.3. Overload/Shutdown Detection intenal Condition
It detects OVERLOAD, POWER MALFUNCTION with [THRM_DET], [SHORT_DET] and [DC_DET] input port. It detects the
following condition depending on the input of the port as below table.
(H: DC ± 5V / L: DC ± 0V)
PROT
Detection of malfunction
Display and operation
SHORT_DET
THRM_DET
DC_DET
H
L
H
Normal
-----
H
H
H
High Temp
Refer to ´THERMAL PROTECTION´
L
L
H
Speaker Short, Malfunction of Amplifier
[OVERLOAD] / POWER OFF
L
H
H
Detection of THERMAL PROTECTION
-
-
L
Detection of POWER MALFUNCTION
[ _ _ _ F76 _ _ _ ] / POWER OFF
6.4. Overload/Thermal Detection Display
When overload is detected, automatic POWER OFF will occur. But if any key on the remote control other than the [POWER] key
is pressed before that (including the [HELP] key), the scroll display will show [SWITCH_OFF_POWER]. Then, 1 second after
display of message, [OVERLOAD] will be shown on the scroll display.
6.5. Activating Self Diagnosis Function (Servicing Mode)
This mode can be used during servicing.
1. Plug the AC adapter to the power source. Press and hold down the [ENTER] button and the [SPEAKERS A] button, and then
press the [POWER] button at the same time.
2. The message, [SERVICE] appears on the display for three seconds, and then it will display the following. Refer to Fig. 6.2.
21
SA-XR700EG
Содержание SA-XR700EG
Страница 5: ...1 2 Caution for AC Cord 5 SA XR700EG ...
Страница 11: ...5 Operating Instructions Procedures 5 1 Remote Control Operation 11 SA XR700EG ...
Страница 12: ...5 2 Main Unit Operation 12 SA XR700EG ...
Страница 13: ...5 3 Main Unit Connections 5 3 1 Video Audio Terminals 13 SA XR700EG ...
Страница 14: ...5 3 2 S Video Audio Terminals 14 SA XR700EG ...
Страница 15: ...5 3 3 Component Audio Terminals 15 SA XR700EG ...
Страница 16: ...5 3 4 Other Connections 16 SA XR700EG ...
Страница 17: ...17 SA XR700EG ...
Страница 18: ...18 SA XR700EG ...
Страница 19: ...5 3 5 For Speakers 19 SA XR700EG ...
Страница 20: ...5 3 6 For FM AM antennas 20 SA XR700EG ...
Страница 24: ...Fig 6 4 24 SA XR700EG ...
Страница 27: ...7 2 Advanced Digital Pictures 7 3 Advanced Digital Sound 7 4 Easy to Use 27 SA XR700EG ...
Страница 32: ...8 3 Main Parts Location Diagram 32 SA XR700EG ...
Страница 64: ...SA XR700EG 64 ...
Страница 74: ...SA XR700EG 74 ...
Страница 76: ...76 SA XR700EG ...
Страница 116: ...SA XR700EG 116 ...
Страница 120: ...120 SA XR700EG ...
Страница 121: ...17 Exploded Views 17 1 Cabinet Parts Location SA XR700EG 121 ...
Страница 122: ...SA XR700EG 122 ...
Страница 123: ...17 2 Packaging SA XR700EG 123 ...
Страница 124: ...SA XR700EG 124 ...