DOWNLOAD Sony STR-DE375 Service Manual ↓ Size: 8.45 MB | Pages: 31 in PDF or view online for FREE

Model
STR-DE375
Pages
31
Size
8.45 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-de375.pdf
Date

Sony STR-DE375 Service Manual ▷ View online

3
STR-DE375
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.
    After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
    The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY  CHECK-OUT
To Exposed Metal 
Parts on Set
0.15 
µF
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 
0
 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
TABLE OF CONTENTS
1. GENERAL
·········································································· 4
2. TEST MODE
······································································ 6
3. DIAGRAMS
3-1.
Circuit Boards Location ····················································· 7
3-2.
Block Diagram ··································································· 9
3-3.
Printed Wiring Board   Main Section ······························· 10
3-4.
Schematic Diagram   Main Section (1/3) ························· 11
3-5.
Schematic Diagram   Main Section (2/3) ························· 12
3-6.
Schematic Diagram   Main Section (3/3) ························· 13
3-7.
Printed Wiring Board   Panel Section ······························· 14
3-8.
Schematic Diagram    Panel Section ································ 15
3-9.
Printed Wiring Board   Power Section ····························· 16
3-10. Schematic Diagram    Power Section ······························· 17
3-11. IC Block Diagrams ··························································· 18
3-12. IC Pin Function Description ············································· 18
4. EXPLODED VIEWS
4-1.
Front Panel Section ·························································· 20
4-2.
Chassis Section ································································· 21
5. ELECTRICAL PARTS LIST
······································· 22
4
STR-DE375
SECTION 1
GENERAL
Front Panel
1
2
3
4
5
qs
qa
qf
qd
q;
7 8
6
9
qg
qh
qj
1
?/1
(POWER) button
2
DISPLAY button
3
DIMMER button
4
PHONES jack
5
PRESET/PTY SELECT  +  ,  –  buttons
TUNING  +  ,  –  buttons
MEMORY button
SHIFT button
PTY button
FM MODE button
FM/AM button
6
SET UP button and indicator
7
NAME button and indicator
8
LEVEL button and indicator
9
SUR button and indicator
q;
VIDEO button
TV/SAT button
DVD/MULTI CH button
MD/TAPE button
CD button
TUNER button
qa
MENU  <  ,  >  buttons
qs
MENU  +  ,  –  buttons
qd
ENTER button
qf
SOUND FIELD ON/OFF
(and indicator),
MODE  +  ,  –  buttons
qg
TREBLE  +  ,  –  buttons
BASS  +  ,  –  buttons
qh
MUTING button
qj
MASTER VOLUME control
5
STR-DE375
This section is extracted
from instruction manual.
qs
qa
3 4 5 6 7
9
q;
1
2
8
1
ANTENNA (AM/FM)
2
DVD/MULTI CH
3
CD
4
MD/TAPE
5
TV/SAT
6
VIDEO
7
SUB WOOFER
8
SPEAKERS SURROUND
9
SPEAKERS CENTER
q;
SPEAKERS FRONT
qa
VOLTAGE SELECTOR
(except Singapore, Malaysia and
Canada models)
qs
AC power cord
Rear Panel
6
STR-DE375
SECTION 2
TEST MODE
FACTORY SET MODE
* All preset contents are reset to the default setting.
* Procedure:
While depressing the  VIDEO  and the  CD  buttons simultaneously,
press the power  ?/1   button to turn on the main power.  The
message “FACTORY” 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:
While depressing the  TUNER  and the  MD/TAPE  buttons
simultaneously, press the power  ?/1  button to turn on the main
power.  The message “INITIAL” appears and initialization is
performed.
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:
While depressing the  TV/SAT  and the  CD  buttons simultaneously,
press the power  ?/1  button to turn on the main power.
1. All segments turn on.
SET UP, SOUND FIELD LED turn on.
2. Press the  VIDEO  button, confirm display
SET UP, NAME LED turn on.
3. Press the  VIDEO  button, confirm display
SOUND CONTROL LEVEL, SOUND CONTROL SUR and
SOUND FIELD LED turn on.
4. Press the  VIDEO  button, All segments turn off.
5. Every pressing of the  VIDEO  button turns on each segment
one after another in the following order.
(Not only the  VIDEO  button, but also the other buttons such as
 TV/SAT ,  MD/TAPE ,  CD ,  TUNER  can be used.)
AM CHANNEL STEP 9 kHz/10 kHz
SELECTION MODE
* Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
* Procedure:
Set the FUNCTION to AM.  Turn off the main power.
While depressing the  TUNING+  button or the  PRESET+  button,
press the power  ?/1  button to turn on the main power.  Either
the message “AM 9 k STEP” or “AM 10 k STEP” appears.  Select
the desired step.
* For Canadian/E model only
SOFTWARE VERSION DISPLAY MODE
* The software version is displayed.
* Procedure:
While depressing the  TUNER  and the  VIDEO  buttons
simultaneously, press the power  ?/1  button to turn on the main
power.  The model name, destination and the software version are
displayed.
AUTOBETICAL MODE (AEP Model only)
* This mode is installed in the Europe models only. When this mode
is used, the receiver scans the broadcasts that can be received by
tuner, and sets up the broadcasts. Be sure to start scanning after
connecting the antenna.
* Procedure:
Check that the antenna is connected. Press the power  ?/1  button
while pressing the  MEMORY  button to turn on the power. The
message “Autobetical select” appears and scanning starts by tuner.
SURROUND 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:
While depressing the  SOUND FIELD ON/OFF  button, press
the power  ?/1  button to turn on the main power.  The message
“SURR CLR” appears and initialization is performed.
KEY CHECK MODE
* Button check
* Procedure:
While depressing the  MD/TAPE  and the  CD  buttons
simultaneously, press the power  ?/1  button to turn on the main
power.
“RES 36 KEY” appears.
Every pressing of any button other than  ?/1  counts down the
buttons.  The buttons which are already counted once are not
counted again.  When all buttons are pressed “RES 00 KEY”
appears.
When  MASTER VOLUME  is rotated in clockwise direction,
“VOL MIN”, “VOL 1” to “VOL 30”, “VOL MAX” appear.
Page of 31
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  • DOWNLOAD Sony STR-DE375 Service Manual ↓ Size: 8.45 MB | Pages: 31 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony STR-DE375 in PDF for free, which will help you to disassemble, recover, fix and repair Sony STR-DE375 Audio. Information contained in Sony STR-DE375 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.