SECTION 3 TEST MODE

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 [A.F.D] and the [DIMMER] buttons si- multaneously, press the power `/1 button to turn on the main power.

2.All segments turn on at the same time, then each segment turns on press the [A.F.D] button.

Factory Set Mode

All preset contents are reset to the default setting. Procedure:

1.While depressing the [SET UP], and the [DIMMER] buttons simultaneously, press the power `/1 button to turn on the 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 [SET UP] button simultaneously, press the power `/1 button to turn on the main power. The ma- chine enters the DEMO mode.

DEMO mode: Wait a while, then the demonstration starts. If the power `/1 button is pressed often the demonstration has

started, the power is turned off, and the demonstration resumes

if the power `/1 button is pressed again.

ALL CLEAR mode; Press the [A.F.D], [SOUND FIELD MODE (+)], and `/1 buttons.

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 [SOUND FIELD MODE (+)] button, press the power `/1 button to turn on the main power. The mes- sage S.F Initialize appears and initialization is performed.

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.

2.While depressing the [TUNING+] button or the [PRESET TUNING +] button, press the power `/1 button to turn on the 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:

1.While pressing the [SOUND FIELD MODE(+)] and [DIMMER] 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.

3.Use the [MUTING] 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 `/1 button while pressing the [MUTING], and [DIM- MER] buttons to turn on the power. The microprocessor ver- sion number appears as follows.

9

Page 8 Page 10
Page 9
Image 9
Sony STR-DE845 service manual Test Mode
Page 8 Page 10

STR-DE845 specifications

The Sony STR-DE845 is a vintage yet impressive 5.1-channel surround sound receiver that has captivated audio enthusiasts since its release. As part of Sony's esteemed line of home audio equipment, this model exemplifies a combination of classic design, robust build quality, and advanced features that enhance the listening experience.

One of the standout features of the STR-DE845 is its power output, capable of delivering 100 watts per channel at 8 ohms. This ample power ensures that your audio experience remains vibrant and dynamic, whether you’re enjoying music or watching movies. The receiver supports a range of speaker configurations, making it versatile enough to accommodate various home theater setups.

Another key characteristic of the STR-DE845 is its compatibility with Dolby Pro Logic and DTS surround sound formats. These technologies bring a cinematic experience into the home, allowing sound to envelop listeners from all directions. The receiver's ability to decode these formats enhances the clarity and immersion of soundtracks, providing an impressive auditory experience.

The STR-DE845 boasts a wide array of connectivity options, including multiple analog and digital inputs, which allow you to connect various audio sources such as CD players, VCRs, and gaming consoles. The inclusion of an AM/FM tuner also opens up the possibility for listening to local radio stations. For convenience, the receiver includes a remote control, enabling users to adjust settings and change inputs from a distance.

In terms of audio processing, the STR-DE845 features Advanced Digital Sound Field Processing (DSFP), which allows users to customize their listening experience based on room acoustics and personal preferences. This technology helps replicate the ambiance of live music venues and movie theaters, delivering an optimized sound experience regardless of the room's characteristics.

The design of the STR-DE845 is another highlight. With a sleek black finish and intuitive layout, this receiver fits seamlessly into any home entertainment setup. The front panel features a clear display, and the user-friendly interface makes navigating settings and configurations straightforward.

Moreover, the receiver's durability is noteworthy. Built with quality components, the STR-DE845 is designed to withstand the test of time, making it a dependable option for audiophiles and casual listeners alike.

In conclusion, the Sony STR-DE845 is a feature-packed surround sound receiver that combines quality, functionality, and a user-friendly experience. With its powerful output, advanced surround sound technologies, and versatility in connectivity, it remains a respectable choice for those looking to elevate their audio and home theater systems.
Top Page Image Contents