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:
[A.F.D]
1. While depressing, the
multaneously, press the power
power.
2. All segments turn on at the same time, then each segment turns
[A.F.D]
on press the button.
Factory Set Mode
All preset contents are reset to the default setting.
Procedure:
[SET UP]
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:
[SET UP]
1. While depressing the
the power button to turn on the main power. The ma-
`/1
chine enters the DEMO mode.
DEMO mode: Wait a while, then the demonstration starts. If
the power button is pressed often the demonstration has
`/1
started, the power is turned off, and the demonstration resumes
if the power `/1 button is pressed again.
ALL CLEAR mode; Press the
+ ]
( ) , and buttons.
`/1
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:
[SOUND FIELD MODE + ]
1. While depressing the
the power `/1 button to turn on the main power. The mes-
sage S.F Initialize appears and initialization is performed.
SECTION 3

TEST MODE

[DIMMER]
and the buttons si-
button to turn on the main
`/1
[DIMMER]
, and the buttons
button to turn on the
`/1
button simultaneously, press
[A.F.D] [SOUND FIELD MODE
,
( ) button, press
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:
1. Set the FUNCTION to AM. Turn off the main power.
[TUNING+]
2. While depressing the
TUNING +]
button, press the power
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
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:
[SOUND FIELD MODE + ]
1. While pressing the
buttons, press the `/1 button to enter the DSP test mode.
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.
[MUTING]
3. Use the button, when selecting the SINE WAVE,
THROUGH, or IMPLUSE mode.
Version Mode
When this mode is used, the microprocessor version number is
displayed.
Procedure:
1. Press the button while pressing the
`/1
MER]
buttons to turn on the power. The microprocessor ver-
sion number appears as follows.
[PRESET
button or the
button to turn on the
`/1
[DIMMER]
( )
and
[MUTING] [DIM-
, and
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