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Sony STR-DB925 Service Manual

Sony STR-DB925
62 pages
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MICROFILM
AEP Model
UK Model
Australian Model
SPECIFICATIONS
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
STR-DB925
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Sony STR-DB925 Specifications

General IconGeneral
TypeStereo Receiver
Number of Channels2
Total Harmonic Distortion (THD)0.09%
Input Sensitivity (MM)2.5 mV
Signal-to-Noise Ratio100 dB
Signal to Noise Ratio (line)100 dB
Digital inputscoaxial, optical
Power Output100 W per channel
Output Power100 W per channel (8 ohms, 20 Hz - 20 kHz, THD 0.09%)
Frequency Response10Hz to 50kHz
THD0.09%
Speaker load impedance8 Ω
Video ConnectionsComposite video

Summary

Specifications

Amplifier Section

Details power output for stereo and surround modes, including impedance and frequency response.

Inputs (Analog)

Lists sensitivity and impedance for various analog audio inputs like PHONO, CD, TAPE, MD/DAT.

Outputs

Specifies output voltage and impedance for TAPE/MD/DAT REC OUT, VIDEO OUT, and WOOFER.

Servicing Note

Factory Set

Procedure to set the unit to its original shipment settings.

Initialization

Erases all preset settings, used when returning the unit to the customer.

Precautions on Removing the Front Panel

Notes on potential issues when the front panel is removed, affecting volume control and display.

DSP Self Diagnosis Function

Assignment of Signals in DSP Test Mode

Table detailing how input signals are assigned to output channels during DSP test mode.

Display of Errors and Main Causes

Lists potential error messages during self-diagnosis and their causes/countermeasures.

General

Front Panel Descriptions

Identifies and explains the function of each control and indicator on the front panel.

Location of Parts and Controls

A diagram showing the numbered parts and controls on the front panel.

Diagrams

Circuit Boards Location

Illustrates the physical placement of various circuit boards within the unit.

Block Diagrams - Input Section

Shows the functional blocks and signal flow for the input processing section.

Schematic Diagram - Power AMP Section

Detailed circuit diagram for the power amplifier stages of the receiver.

Printed Wiring Board - Display Section

Layout of components and traces on the display circuit board.

Exploded Views

Case and Back Panel Section

Exploded view of the unit's exterior casing and rear panel components.

Front Panel Section

Exploded view detailing the assembly of the front panel and its controls.

Chassis Section

Exploded view showing the internal chassis, boards, and major components.

Electrical Parts List

Capacitors

List of all capacitors used, including part number, type, and value.

Resistors

List of all resistors used, including part number, type, and value.

Transistors

List of all transistors used, including part number and type.

ICs

List of all integrated circuits used, including part number and function.

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