STR-DE635 - Sony Audio Service Manual (repair manual). Page 5

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* 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:

While depressing the ENTER, the LEVEL and the EQ buttons
simultaneously, press the power [

1/u] button to turn on the main

power.  All segments turn on at the same time, then each segment
turns on press the ENTER button..

* All preset contents are reset to the default setting.
* Procedure:
While depressing the SET UP, the LEVEL and the ENTER buttons
simultaneously, press the power [

1/u] button to turn on the main

power.  The message Factry Set appears and the present contents
are reset to the default values.

* All preset contents are cleared when this mode is activated.  Use

this mode before returning the product to clients upon completion
of repair.

* Procedure:

While depressing the SET UP button simultaneously, press the
power [

1/u] button to turn on the main power. The machine enters

the DEMO mode.DEMO mode: Wait a while, then the
demonstration starts. If the power [

1/u] button is pressed often

the demonstration has started, the power is turned off, and the
demonstration resumes if the power [

1/u] button is pressed again.

ALL CLEAR mode; If the power [

1/u] button is pressed often

the machine enters the DEMO mode, but before the demonstration
starts, the display is turned off. Press [

1/u] again. No response is

returned. The press [

1/u] again. The preset data is cleared and

the machine enters the normal power-on state.

* 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:

While depressing the SOUND FIELD MODE button, press the
power [

1/u] button to turn on the main power.  The message S.F

Initialize appears and initialization is performed.

* Either the 9 kHz step or 10 kHz step can be selected for the AM

channel step.

* Procedure:

Set the FUNCTION to AM.  Turn off the main power.
While depressing the TUNING+ button or the PRESET TUNING
+ button, press the power [

1/u] button to turn on the main power.

Either the message AM 9kHz Step or AM 10kHz Step appears.
Select the desired step.

* 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

While pressing the SETUP, LEVEL and SUR buttons, press the
POWER button to enter the DSP test mode.  The message DSP
TEST MODE appears.  When an error occurs, 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.
Then, the mode can be switched the (SIGN WAVE) (THROUGH)
and (INPULSE) mode.

* This mode is installed in the Europe models only. When this mode

is used, the receiver scans the broadcasts that can be received by
tuner, and sets up the broadcasts. Be sure to start scanning after
connecting the antenna.
Procedure:
Check that the antenna is connected. Press the POWER button
while pressing the MEMORY button to turn on the power. The
message “Autobetical select” appears and scanning starts by tuner.

* When this mode is used, the microprocessor version number is

displayed.

* Procedure:

Press the POWER button while pressing the ENTER, LEVEL,
and SUR buttons to turn on the power. The microprocessor version
number appears as follows.

1. When the front panel is removed, the VR board is removed at the

same time.  Consequently the LEDs cannot be turned on and the
sound volume cannot be increased or decreased from the remote
control.

2. When servicing the DIGITAL board, be sure to connect the earth

land of the DIGITAL board with the chassis frame so that the
earth potential of the DIGITAL board must not be floated from
the chassis frame.

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0

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1

ANTENNA

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DIGITAL

3

5.1 CH INPUT

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SPEAKERS (FRONT)

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SPEAKERS (REAR)

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SPEAKERS (CENTER)

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WOOFER

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INPEDANCE SELECTOR

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AC power cord

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AC OUTLET

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S-LINK

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VIDEO 1

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VIDEO 2

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DVD/LD (US, Canadian models)
DVD (AEP model)

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TV/SAT (US, Canadian models)
TV/LD (AEP model)

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MONITOR

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MD/TAPE

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CD

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