Test Mode - Sony STR-DE845 Service Manual

Fluorescent Indicator Tube Test Mode
All fluorescent segments are tested. When this test is activated,
all segments turn on at the same time, then each segment turns on
one after another.
Procedure:
1. While depressing, the
multaneously, press the power
power.
2. All segments turn on at the same time, then each segment turns
on press the
Factory Set Mode
All preset contents are reset to the default setting.
Procedure:
1. While depressing the
simultaneously, press the power
main power. The message Factry Set appears and the present
contents are reset to the default values.
All Clear Mode
All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
1. While depressing the
the power
chine enters the DEMO mode.
DEMO mode: Wait a while, then the demonstration starts. If
the power
started, the power is turned off, and the demonstration resumes
if the power
ALL CLEAR mode; Press the
+ ]
( ) , and
Sound Field Clear Mode
The preset sound field is cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
1. While depressing the
the power
sage S.F Initialize appears and initialization is performed.
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[A.F.D] [DIMMER]
and the
button to turn on the main
`/1
[A.F.D]
button.
[SET UP] [DIMMER]
, and the
button to turn on the
`/1
[SET UP]
button simultaneously, press
`/1 button to turn on the main power. The ma-
`/1 button is pressed often the demonstration has
button is pressed again.
`/1
[A.F.D] [SOUND FIELD MODE
,
`/1 buttons.
[SOUND FIELD MODE + ]
button to turn on the main power. The mes-
`/1
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SECTION 3

TEST MODE

AM Channel Step 9 kHz/10 kHz
Selection Mode (US, Canadian, and E Models)
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
buttons si-
1. Set the FUNCTION to AM. Turn off the main power.
2. While depressing the
TUNING +]
main power.
3. Either the message AM 9kHz Step or AM 10kHz Step appears.
Select the desired step.
DSP Test Mode
It tests whether the DSP works correctly or not. When the DSP
buttons
test is activated, the test data is output from the DSP (IC1401:
CXD2712R) of the DIGITAL board and is written in the RAM
(IC1402: IDT71V016S). When the test data is read from the RAM
by the DSP, the data output must be equivalent to the original data.
If they disagree, an error is triggered. Errors can be caused by the
broken data line or defective soldering.
Procedure:
1. While pressing the
buttons, press the
2. The message DSP TEST MODE appears. When an error oc-
curs, the message DSP2 ERROR is displayed. When there is
no error, the message DSP2 NO ERROR appears and the 1
kHz signal is output to all channels.
3. Use the
THROUGH, or IMPLUSE mode.
Version Mode
When this mode is used, the microprocessor version number is
displayed.
Procedure:
1. Press the
MER]
buttons to turn on the power. The microprocessor ver-
sion number appears as follows.
( )
button, press
[TUNING+]
button or the
button, press the power `/1 button to turn on the
[SOUND FIELD MODE + ]
`/1 button to enter the DSP test mode.
[MUTING]
button, when selecting the SINE WAVE,
[MUTING]
button while pressing the
`/1
[PRESET
[DIMMER]
( )
and
[DIM-
, and
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