Sony STR-DB798 Service Manual

SERVICE MANUAL
FM STEREO FM/AM RECEIVER
AEP Model
UK Model
Taiwan Model
SPECIFICATIONS
STR-DB798
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
This receiver incorporates Dolby* Digital and Pro
Logic Surround and the DTS** Digital Surround
System.
* Manufactured under license from Dolby
Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are
trademarks of Dolby Laboratories.
**“DTS” and “DTS Digital Surround” are registered
trademarks of Digital Theater Systems, Inc.
– Continued on next page –
9-879-775-01
2005G05-1
© 2005.07
Amplifier section
Power Output
Models of area code CEL, CEK, TW
Rated Power Output at Stereo Mode
(8 ohms 20 Hz – 20 kHz, THD 0.09%)
100 W + 100 W
1)
(8 ohms 1 kHz, THD 0.7%)
110 W + 110 W
1)
(8 ohms 1 kHz, THD 10%)
135 W + 135 W
1)
Reference Power Output
1)
(8 ohms 20 Hz – 20 kHz, THD 0.09%)
FRONT
2)
: 100 W/ch
CENTER
2)
: 100 W
SURR
2)
: 100 W/ch
SURR BACK
2)
: 100 W/ch
(8 ohms 1 kHz, THD 0.7%)
FRONT
2)
: 110 W/ch
CENTER
2)
: 110 W
SURR
2)
: 110 W/ch
SURR BACK
2)
: 110 W/ch
(8 ohms 1 kHz, THD 10%)
FRONT
2)
: 135 W/ch
CENTER
2)
: 135 W
SURR
2)
: 135 W/ch
SURR BACK
2)
: 135 W/ch
1) Measured under the following conditions:
2) Depending on the sound field settings and the
source, there may be no sound output.
Frequency response
Inputs (Analog)
3) INPUT SHORT.
4) Weighted network, input level.
Inputs (Digital)
Outputs (Analog)
Outputs (Digital)
Equalizer
Area code Power requirements
AEP, UK 230 V AC, 50 Hz
Taiwan 110 V AC, 60 Hz
PHONO RIAA equalization curve
±0.5 dB
MULTI CH IN, SA-CD/
CD, MD/TAPE, DVD,
TV/SAT, VIDEO 1, 2, 3
10 Hz – 100 kHz
+0.5/–2 dB (when
ANALOG DIRECT is
selected)
PHONO Sensitivity: 2.5 mV
Impedance: 50 k ohms
S/N
3)
: 86 dB
(A, 2.5 mV
4)
)
MULTI CH IN, SA-CD/
CD, MD/TAPE, DVD,
TV/SAT, VIDEO 1, 2, 3
Sensitivity: 150 mV
Impedance: 50 k ohms
S/N
3)
: 96 dB
(A, 150 mV
4)
)
DVD, SA-CD/CD
(Coaxial)
Sensitivity: –
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
DVD, TV/SAT,
MD/TAPE, VIDEO 3
(Optical)
Sensitivity: –
Impedance: –
S/N: 100 dB
(A, 20 kHz LPF)
MD/TAPE (OUT),
VIDEO 1, 2
(AUDIO OUT)
Voltage: 150 mV
Impedance: 2.2 k ohms
SUB WOOFER Voltage: 2 V
Impedance: 1 k ohm
MD/TAPE (Optical) Sensitivity: –
Gain levels ±10 dB, 1 dB step
Ver. 1.0 2005.07

Sony STR-DB798 Specifications

General

Impedance	8 Ω
Supported radio bands	FM
Radio Data System (RDS)	Yes
Channels quantity	7 channels
I/O ports	Output(Component x 1, Optical Digital x 1, Composite x 1, S-Video x 1), Input(Component x 2, Optical Digital x 4, S-Video x 4, Coaxial Digital x 2, Composite x 4)

Summary

Disassembly Procedures

Disassembly Flow and Case Removal

Step-by-step flow and procedure for case removal.

Board Removal Procedures

Test Mode Operations

System Test Modes Description

Electrical Adjustments

Bias Adjustment Procedure

Procedure for adjusting bias voltage on the MAIN board.

Diagrams and Waveforms

Block Diagrams

System block diagrams for various sections.

Waveforms

IC Pin Function Descriptions

DIGITAL Board IC Pin Functions

Pin function description for ICs on the DIGITAL board.

A/V Sync Board IC Pin Functions

Pin function description for IC2010 on the A/V SYNC board.

Electrical Parts List

Component Lists by Board