STR-DE185 - Sony Audio Service Manual (repair manual)

Model
STR-DE185
Pages
30
Size
4.05 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-de185.pdf
Date

View Sony STR-DE185 Service Manual online

1
SERVICE MANUAL
US Model
AEP Model
UK Model
STR-DE185
FM STEREO/FM-AM RECEIVER
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 8 ohm loads, both channels driven, from
40 – 20,000 Hz; rated 100 watts per channel
minimum RMS power, with no more than
0.09 % total harmonic distortion from 250
milliwatts to rated output (Models of area code
US only).
Amplifier section
POWER OUTPUT
Models of area code US
Rated Power Output at Stereo Mode
(8 ohms 40 Hz – 20 kHz, THD 0.09 %)
100 W + 100 W
Models of area code AEP, UK
Rated Power Output at Stereo Mode
(
8 ohms 1 kHz, THD 0.7 %)
100 W + 100 W
 1)
1) Measured under the following conditions:
Area code
Power requirements
AEP, UK
230 V AC, 50 Hz
Frequency response
CD, MD/TAPE,
20 Hz – 50 kHz
VIDEO 1, VIDEO 2
+0/–0.5 dB (with bass
boost bypassed)
Inputs (Analog)
CD, MD/TAPE,
Sensitivity: 250 mV
VIDEO 1, VIDEO 2
Impedance: 50 kilohms
S/N
 2)
 : 85 dB
(A, 250 mV
 3) 
)
2) INPUT SHORT.
3) Weighted network, input level.
SPECIFICATIONS
Outputs
MD/TAPE, VIDEO 1
Voltage: 250 mV
Impedance: 10 kilohms
Bass Boost:
+8 dB at 70 Hz
Tone:
±10 dB at 100 Hz and
10 kHz
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, 2.2 µV/75 ohms
Stereo:
38.3 dBf, 22.5 µV/75 ohms
Usable sensitivity
11.2 dBf, 1 µV/75 ohms
S/N
Mono:
76 dB
Stereo:
70 dB
Harmonic distortion at 1 kHz
Mono:
0.5%
Stereo:
0.8%
Separation
35 dB at 1 kHz
Frequency response
30 Hz – 15 kHz,
+0.5/–2 dB
Selectivity
60 dB at 400 kHz
Ver 1.1  2003. 11
9-873-586-02
2003K04-1
© 2003.11
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
– Continued on next page –
2
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.
STR-DE185
AM tuner section
Tuning range
Models of area code US
With 10-kHz tuning scale: 530 – 1710 kHz
 4)
With 9-kHz tuning scale: 531 – 1710 kHz
 4)
Models of area code AEP, UK
With 9-kHz tuning scale: 531 – 1602 kHz
Antenna
Loop antenna
Intermediate frequency
450 kHz
Usable sensitivity
50 dB/m (at 1,000 kHz or
999 kHz)
S/N
45 dB (at 50 mV/m)
Harmonic distortion
1.0 % (50 mV/m,
400 Hz)
Selectivity
     At 9 kHz:
35 dB
     At 10 kHz:
40 dB
4) You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in any AM station, turn off
the receiver. Hold down PRESET TUNING + and
press ?/1. All preset stations will be erased when
you change the tuning scale. To reset the scale to
10 kHz (or 9 kHz), repeat the procedure.
General
Power requirements
Area code
Power consumption
US
120 V AC, 60 Hz
AEP, UK
230 V AC, 50/60 Hz
Power consumption
Area code
Power consumption
US
190 W
AEP, UK
210 W
Power consumption (during standby mode)
0.5 W (for models of all area code)
AC outlets
Area code
AC outlets
US
1 switched, 120 W/1A MAX
AEP, UK
1 switched, 100 W MAX
Dimensions
430 
× 145 × 300 mm
(16 
7/8
 
× 5 
6/8
 
× 11 
6/8
 in.)
including projecting parts
and controls
Mass (Approx.)
7.0 kg (15 lb 7 oz)
Supplied accessories
FM wire antenna (1)
AM loop antenna (1)
Remote commander RM-U185 (1)
R6 (size-AA) batteries (2)
Design and specifications are subject to change without
notice.
MODEL IDENTIFICATION
— BACK PANEL —
Part No.
MODEL
PART No.
US
4-238-277-0s
AEP
4-238-277-1s
UK
4-238-277-2s
3
TABLE OF CONTENTS
1. GENERAL
Main unit ................................................................................. 4
Remote button description ....................................................... 5
2. DISASSEMBLY
2-1.   Case ..................................................................................... 6
2-2.   Front Panel Section ............................................................. 7
2-3.   Back Panel ........................................................................... 7
2-4.   Main Board ......................................................................... 8
3. TEST  MODE
........................................................................ 9
4. DIAGRAMS
4-1.   IC Pin Description ............................................................. 10
4-2.   Circuit Boards Location .................................................... 11
4-3.   Block Diagram – Main Section – ...................................... 12
4-4.   Block Diagram – Power Section – .................................... 13
4-5.   Printed Wiring Board – Main Section – ............................ 14
4-6.   Printed Wiring Boards – H/P, Outlet Section – ................. 15
4-7.   Schematic Diagram – Main Section (1/2) – ...................... 16
4-8.   Schematic Diagram – Main Section (2/2) – ...................... 17
4-9.   Schematic Diagram – Display Section – ........................... 18
4-10. Printed Wiring Board – Display Section – ........................ 19
4-11. Printed Wiring Board – Power SW Section – ................... 20
5. EXPLODED VIEWS
5-1.   Case Section ...................................................................... 21
5-2.   Front Panel Section ........................................................... 22
5-3.   Chassis Section ................................................................. 23
6. ELECTRICAL PARTS LIST
......................................... 24
STR-DE185
1.5 k
0.15 
µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the following
safety check 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 TEST
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)
4
STR-DE185
SECTION 1
GENERAL
This section is extracted
from instruction manual.
List of Button 
Locations and 
Reference Pages
5
GB
List of Button Locations and Reference Pages
Main unit
How to use this page
Use this page to find the location of buttons that are
mentioned in the text.
Illustration number
r
NAME 5 (18)
R
R
Name of button/part
Reference page
ALPHABETICAL ORDER
A – H
AM 8 (13, 14)
BALANCE L/R q; (12)
BASS +/– wa (12)
BASS BOOST ql (12)
CD qg (8, 12)
DIRECT wg (13)
DISPLAY  qa (12, 16)
Display 9 (11-16, 18, 19)
FM 6 (13, 14)
FM MODE wd (14)
I – O
IR (receptor) 2 (4, 22)
SHIFT wh (15)
SLEEP (models of area code U)
4
 (19)
SPEAKERS A wj (10, 12)
SPEAKERS B wk (10, 12)
T – Z
TREBLE +/– w; (12)
TUNER qh (8, 12-15, 18)
TUNING/CHAR +/– ws (14, 18)
VIDEO 1 qs (12)
VIDEO 2 qd (8, 12)
BUTTON DESCRIPTIONS
?/1
 (power) 1 (11, 13, 23)
MASTER VOLUME qj (12, 20)
MD/TAPE qf (8, 12)
MEMORY/ENTER wf (13, 15,
18)
MUTING qk (12, 20)
NAME 5 (18)
Numeric buttons 3 (13)
P – S
PHONES wl (12, 21)
PRESET/PTY SELECT +/–
(models of area code CEL,
CEK) 7 (15, 16)
PRESET TUNING +/– (models of
area code U) 7 (15, 23)
PTY (models of area code CEL,
CEK) 4
 
(16)
1
2
3
456
7
8
9q;
qa
qs qd qf qg qh
qj
qk
ql
w;
wa
ws
wd
wf
wg
wh
wj
wk
wl

Download Sony STR-DE185 Service Manual (Repair Manual)

Here you can view online and download Sony STR-DE185 Service Manual in PDF. STR-DE185 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony STR-DE185 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.