STR-DG300 - Sony Audio Service Manual (repair manual)

str-dg300 service manual
Model
STR-DG300
Pages
48
Size
4.69 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-dg300.pdf
Date

Read Sony STR-DG300 Service Manual online

1
SERVICE MANUAL
AEP Model
STR-DG300
FM STEREO/FM-AM RECEIVER
Amplifier section
Stereo Power Output
 1)
, Reference Power Output
 1) 2)
8 ohms 20 Hz – 20 kHz, THD 0.09 %
90 W + 90 W, 110 W/ch
8 ohms 1 kHz, THD 0.7 %
105 W + 105 W, 120 W/ch
8 ohms 1 kHz, THD 10 %
130 W + 130 W, 160 W/ch
1) Measured under the following conditions:
230 V AC, 50 Hz
2) Reference power output for front speakers.
Depending on the sound field settings and
the source, there may be no sound output.
Frequency response
Analog
10 Hz – 70 kHz
+0.5/–2 dB (with sound
field and tone bypassed)
SPECIFICATIONS
Inputs
Analog
Sensitivity: 500 mV/
50 kohms
S/N
 3)
 : 96 dB
(A, 500 mV
 4)
 )
Digital (Coaxial)
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
Digital (Optical)
S/N: 100 dB
(A, 20 kHz LPF)
Output (Analog)
AUDIO OUT
Voltage: 500 mV/10 kohms
SUB WOOFER
Voltage: 2 V/1 kohm
Tone
Gain levels
±6 dB, 1 dB step
3) INPUT SHORT (with sound field and tone bypassed).
4) Weighted network, input level.
Ver. 1.0  2006. 06
9-887-325-01
2006F04-1
© 2006. 06
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
Manufactured under license from Dolby Laboratories.
“Dolby” and the double-D symbol are trademarks of
Dolby Laboratories.
“DTS” and “DTS 2.0” are trademarks of Digital
Theater Systems, Inc.
– Continued on next page –
Photo: Black type
2
STR-DG300
FM tuner section
Tuning range
87.5 – 108.0 MHz
Intermediate frequency
10.7 MHz
Useable sensitivity
11.2 dBf, 1 µV/75 ohms
S/N
Mono/Stereo
76 dB/70 dB
Harmonic distortion at 1 kHz
Mono/Stereo
0.3%/0.5%
Separation
45 dB at 1 kHz
Frequency response
30 Hz – 15 kHz,
+0.5/–2 dB
AM tuner section
Tuning range
With 9-kHz tuning scale: 531 – 1,602 kHz
Intermediate frequency
450 kHz
Usable sensitivity
50 dBµ/m (at 1,000 kHz or
999 kHz)
General
Power requirements
230 V AC, 50/60 Hz
Power consumption
220 W
Power consumption (during standby mode)
0.2 W
AC outlets
1 switched, 100 W/0.4A
MAX
Dimensions (w/h/d) (Approx.)
430 
×
 157.5 
×
 316 mm
including projecting parts
and controls
Mass (Approx.)
7.5 kg
Supplied accessories
FM wire antenna (1)
AM loop antenna (1)
Remote commander RM-AAU007 (1)
R6 (size-AA) batteries (2)
Design and specifications are subject to change
without notice.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED  LINE
WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS  WHOSE
PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  MANUAL  OR
IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
MODEL IDENTIFICATION
— BACK PANEL —
Part No.
MODEL
PART No.
AEP
2-665-982-0s
3
STR-DG300
TABLE OF CONTENTS
1. GENERAL
Description and location of parts ............................................. 4
2. DISASSEMBLY
2-1.   Case ..................................................................................... 6
2-2.   Front Panel Section ............................................................. 7
2-3.   Back Panel Section .............................................................. 7
2-4.   DIGITAL Board .................................................................. 8
2-5.   MAIN Board Section .......................................................... 8
2-6.   STANDBY Board ............................................................... 9
3. TEST MODE
..................................................................... 10
4. DIAGRAMS
4-1.   Block Diagram – Tuner/Audio Section – .......................... 11
4-2.   Block Diagram – Digital Section – ................................... 12
4-3.   Block Diagram – Key/Display Section – .......................... 13
4-4.   Block Diagram – Power Section – .................................... 14
4-5.   Circuit Boards Location .................................................... 15
4-6.   Printed Wiring Boards – Main Section – .......................... 16
4-7.   Schematic Diagram – Main Section (1/2) – ...................... 17
4-8.   Schematic Diagram – Main Section (2/2) – ...................... 18
4-9.   Printed Wiring Board – Digital Section (Side A) – ........... 19
4-10. Printed Wiring Board – Digital Section (Side B) – ........... 20
4-11. Schematic Diagram – Digital Section (1/5) – ................... 21
4-12. Schematic Diagram – Digital Section (2/5) – ................... 22
4-13. Schematic Diagram – Digital Section (3/5) – ................... 23
4-14. Schematic Diagram – Digital Section (4/5) – ................... 24
4-15. Schematic Diagram – Digital Section (5/5) – ................... 25
4-16. Printed Wiring Board – Front B Speaker Section – .......... 26
4-17. Schematic Diagram – Front B Speaker Section – ............. 26
4-18. Printed Wiring Boards – Display Section – ...................... 27
4-19. Schematic Diagram – Display Section – ........................... 28
4-20. Printed Wiring Board – Power Section – .......................... 29
4-21. Schematic Diagram – Power Section – ............................. 30
5. EXPLODED VIEWS
5-1.   Case Section ...................................................................... 38
5-2.   Front Panel Section ........................................................... 39
5-3.   Chassis Section ................................................................. 40
6. ELECTRICAL PARTS LIST
........................................ 41
4
STR-DG300
SECTION 1
GENERAL
This section is extracted
from instruction manual.
4
GB
Description and location of parts
Getting Started
Front panel
?/1
VIDEO 3 IN/ 
PORTABLE AUDIO IN
SPEAKERS
(OFF/A/B/A+B)
PHONES
TREBLE
BASS
A.F.D.
MOVIE
MUSIC
DIRECT
TUNING MODE
DISPLAY
INPUT MODE
INPUT SELECTOR
TUNING
+
WOOFER
ON/OFF
MUTING
MASTER VOLUME
3
7
5
9
q;
ql
qa
qs
qj
qk
qd
qf
qg
qh
1
2
4
6
8
Name
Function
A ?
/
1
Press to turn the receiver 
on or off (page 19, 23, 24, 
32, 34).
B
SPEAKERS 
(OFF/A/B/A+B)
Press to select the speaker 
system (page 20).
C
TUNING MODE
Press to select the tuning 
mode (page 33, 36).
D
Display
The current status of the 
selected component or a 
list of selectable items 
appears here (page 6). 
E
Remote sensor
Receives signals from 
remote commander.
F
DISPLAY
Press to select information 
displayed on the display 
(page 37, 38).
Name
Function
G
INPUT MODE
Press to select the input 
mode when the same 
components are connected 
to both digital and analog 
jacks (page 38).
H
MASTER 
VOLUME
Turn to adjust the volume 
level of all speakers at the 
same time (page 21, 22, 
23, 24).
I
MUTING
Press to mute the sound 
(page 22).
J
WOOFER 
 
ON/OFF
Press to turn the sub 
woofer on or off.
K
INPUT 
SELECTOR
Turn to select the input 
source to playback (page 
22, 23, 24, 31, 33, 36, 38, 
39).
L
DIRECT
Press to listen to high 
quality analog sound 
(page 31).
5
GB
Gettin
g
 Sta
rted
Name
Function
M
MOVIE, 
 
MUSIC
Press to select sound fields 
for movie or music (page 
29).
N
A.F.D.
Press to select A.F.D. 
mode (page 29).
O
TREBLE +/–
Press to adjust the treble 
level of the front speakers 
(page 28).
P
BASS +/–
Press to adjust the bass 
level of the front speakers 
(page 28).
Q
TUNING +/–
Turn to scan a station 
(page 33, 35).
R
VIDEO 3 IN/
PORTABLE 
AUDIO IN jack
To connect a portable 
audio such as MP3 player, 
etc. (page 15, 22).
S
PHONES jack
Connects to a headphone 
(page 43).
6
GB
About the indicators on the display
MEMORY
L
C
R
SL
SR
SW
LFE
SP A
SP B
RDS
STEREO MONO
A.DIRECT
D.RANGE
SLEEP OPT COAX
DIGITAL
;
DTS
q;
9
qd
qf
qa
qs
8
6
7
4
3
5
2
1
Name
Function
A
SW
Lights up when you press 
WOOFER ON/OFF on the 
receiver to turn on the sub 
woofer and the audio signal is 
output from the SUB WOOFER 
jack.
B
LFE
Lights up when the disc being 
played back contains an LFE 
(Low Frequency Effect) 
channel and the LFE channel 
signal is actually being 
reproduced.
C
SP A/SP B
Lights up according to the 
speaker system used. However, 
these indicators do not light up 
if the speaker output is turned 
off or if a headphone is 
connected.
D ;
DIGITAL
Lights up when Dolby Digital 
signals are input.
Note
When playing a Dolby Digital 
format disc, be sure that you 
have made digital connections 
and that INPUT MODE is not 
set to “ANALOG” (page 38).
E
DTS
Lights up when DTS signals are 
input.
Note
When playing a DTS format 
disc, be sure that you have made 
digital connections and that 
INPUT MODE is not set to 
“ANALOG” (page 38).
F
MEMORY
Lights up when a memory 
function, such as Preset 
Memory (page 35), etc., is 
activated.
Name
Function
G
A.DIRECT
Lights up when ANALOG 
DIRECT is selected (page 31).
H
Preset 
station 
indicators
Lights up when using the 
receiver to tune in radio stations 
you have preset. For details on 
presetting radio stations, see 
page 35.
I
Tuner 
indicators
Lights up when using the 
receiver to tune in radio stations 
(page 32), etc.
J
D.RANGE
Lights up when dynamic range 
compression is activated (page 
27).
K
COAX
Lights up when INPUT MODE 
is set to “AUTO IN” and the 
source signal is a digital signal 
being input through the 
COAXIAL jack, or when 
INPUT MODE is set to “COAX 
IN” (page 38).
L
OPT
Lights up when INPUT MODE 
is set to “AUTO IN” and the 
source signal is a digital signal 
being input through the 
OPTICAL jack, or when 
INPUT MODE is set to “OPT 
IN” (page 38).
M
SLEEP
Lights up when the sleep timer 
is activated (page 39).
7
GB
Gettin
g
 Sta
rt
ed
Name
Function
N
Playback 
channel 
indicators
 
L
 
R
 
C
 
SL
 
SR
The letters (L, C, R, etc.) 
indicate the channels being 
played back. The boxes around 
L and R show the receiver 
downmixes the source sound to 
2 channels.
Front Left
Front Right
Center (monaural)
Surround Left
Surround Right
Example:
Recording format (Front/
Surround): 3/2.1
Sound Field: A.F.D. AUTO
L
C
R
SL
SR
SW
Page of 48
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Download Sony STR-DG300 Service Manual (Repair Manual)

Here you can read online and download Sony STR-DG300 Service Manual in PDF. STR-DG300 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony STR-DG300 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.