Sony STR-DE135 Service Manual

MICROFILM
SERVICE MANUAL
FM STEREO/FM-AM-RECEIVER
US Model
AEP Model
UK Model
STR-DE135
SPECIFICATIONS
Photo: US model
Audio power specifications (US model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
With 8-ohm load, both channels driven, from 20 – 20,000 Hz,
rated 100 watts per channel minimum RMS power, with no
more than 0.09 % total harmonic distortion from 250 milli-
watts to rated output.
Amplifier section
Stereo mode (8 ohms at 20 Hz – 20 kHz less than
0.09 % total harmonic distortion)
100 W + 100 W (US model)
(DIN 1 kHz, 4 ohms)
60 W + 60 W (AEP, UK models)
Frequency response TV/SAT, CD, MD/TAPE, VIDEO
(US model)
TV/LD, CD, MD/TAPE, VIDEO
(AEP, UK models)
10 Hz – 50 Hz ± 1 dB
Inputs
Sensitivity Impedance S/N
CD,
MD/TAPE,
150 mV
50
78 dB
TV/SAT, kilohms
VIDEO
(US model)
Sensitivity Impedance S/N
CD,
MD/TAPE,
150 mV
50
78 dB
TV/LD, kilohms
VIDEO
(AEP, UK models)
outputs MD/TAPE REC OUT:
Voltage: 150 mV,
impedance: 10 kilohms
VIDEO AUDIO OUT:
Voltage: 150 mV,
impedance: 10 kilohms
PHONES: Accepts low and high
impedance headphones
Muting Full mute
BASS BOOST + 10 dB at 70 Hz
TONE ± 8 dB at 100 Hz and 10 kHz
Tuner Section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna terminals 75 ohms, unbalanced
Intermediate frequency 10.7 MHz
Sensitivity Mono: 18.3 dBf, 4.5 µV
Stereo: 38.3 dBf, 45 µV (US model)
Mono: 18.3 dBf, 2.2 µV/75 ohms
Stereo: 38.3 dBf, 22.5 µV/75 ohms
(AEP, UK models)
Usable sensitivity 11.2 dBf, 2 µV (IHF) (US model)
11.2 dBf, 1 µV/75 ohms (IHF)
(AEP, UK models)
S/N Mono: 76 dB
Stereo: 70 dB
Harmonic distortion at 1 kHz Mono: 0.3 %
Stereo: 0.5 %
Separation 45 dB at 1kHz
Frequency response 30 Hz – 15 kHz dB
Selectivity 60 dB at 400 kHz
AM tuner section
Tuning range 10 kHz interval*
530 – 1710 kHz
9 kHz interval
531 – 1710 kHz (US model)
531 – 1602 kHz (AEP, UK models)
+0.5
–2
– Continued on next page –

Sony STR-DE135 Specifications

General

Total Harmonic Distortion	0.09%
Speaker Load Impedance	8 ohms
Speaker Impedance	8 - 16 ohms
Frequency Response	10 Hz - 50 kHz
Dimensions	430 x 132.5 x 298 mm
Tuning Range	FM: 87.5 MHz - 108.0 MHz, AM: 530 kHz - 1710 kHz
Input Sensitivity	150 mV (line)

Summary

Specifications Overview

Audio Power Output

Details RMS power and total harmonic distortion for US models.

Amplifier Section

Lists stereo mode power output and frequency response specifications.

Tuner Section

Covers FM tuner specifications including tuning range and sensitivity.

AM Tuner Section

Lists AM tuner tuning range and interval selection.

Section 1 Servicing Notes

Safety Check-Out

Procedure for performing a safety check after service.

Leakage Test

Methods for measuring AC leakage current from exposed parts.

Section 2 General

Location of Controls

Identifies controls on the front and rear panels of the unit.

Section 3 Disassembly

CASE

Procedure for removing the outer case.

FRONT PANEL SECTION

Steps to disassemble and remove the front panel.

REAR PANEL SECTION

Procedure for removing the rear panel assembly.

MAIN BOARD

Steps for accessing and removing the main circuit board.

Section 4 Test Mode

Fluorescent Indicator Tube Test Mode

Activates all display segments for testing purposes.

AUTO-BETICAL Check Mode

Auto-scans and memorizes RDS stations.

AM Tuning Interval Selection Mode

Allows selection between 9 kHz and 10 kHz AM tuning intervals.

Software Version Display Mode

Displays the current software version of the unit.

Section 5 Diagrams

Circuit Boards Location

Illustrates the physical placement of internal circuit boards.

Notes for Printed Wiring Boards and Schematic Diagrams

Explains symbols and conventions used in diagrams.

Printed Wiring Board – MAIN Board

Shows the layout and component placement for the main board.

Schematic Diagram – MAIN Board (1/2)

The first part of the circuit schematic for the main board.

Printed Wiring Boards – PANEL Section

Layouts for the display and key circuit boards.

Schematic Diagram – PANEL Section

Circuit schematic for panel-related boards.

Printed Wiring Boards – SPK Switch, Secondary, Primary, Standby Trans Boards

Layouts for speaker switch, secondary, primary, and standby boards.

Schematic Diagram – Main Board (2/2) and Other Boards

Second part of main board schematic and other board schematics.

IC Pin Function Description

Details the function of each pin for key integrated circuits.

Section 6 Exploded Views

Case Section Exploded View

Diagram showing the breakdown of the unit's case components.

Front Panel Section Exploded View

Diagram illustrating the exploded view of the front panel assembly.

Chassis Section Exploded View

Diagram showing the chassis and its internal components.

Section 7 Electrical Parts List

Display Board Parts List

Lists all electrical components for the display board.

Key Board Parts List

Lists all electrical components for the key board.

Main Board Parts List (Capacitors)

Details the capacitors used on the main circuit board.

Main Board Parts List (Diodes, Transistors, Resistors)

Lists diodes, transistors, and resistors on the main board.

Hardware List

Hardware List

Lists screws, fasteners, and other hardware used in the unit.

Accessories & Packing Materials

Accessories and Packing Materials

Lists included accessories and packing items for the unit.