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
5
STR-DE185
24
GB
Remote button description
You  can use the remote RM-U185 to operate
the components in your system.
>10
0
7
8
9
4
5
6
1
2
3
ENTER
CD
VIDEO 2
MD/TAPE
VIDEO 1
DVD 
TUNER
SYSTEM
STANDBY
SHIFT
 CH/PRESET 
+
TREBLE
MUTING
BASS BOOST
TV/VIDEO
– /– –
ANT
TV/VTR
+
BASS
+
TV VOL
TV CH
+
+
L    BALANCE    R
MASTER
VOL
RETURN
D. TUNING
TOP MENU
DVD MENU
ENTER
f
F
G
g
SLEEP
AV
?/1
?/1
D.SKIP
The tables below show the settings of each
button.
Remote
Operations
Function
Button
SLEEP
Receiver
Activates the sleep
function and the duration
which the receiver turns
off automatically.
?/1
Receiver
Turns the receiver on or
off.
VIDEO 1
Receiver
To watch VCR.
(VTR mode 3)
VIDEO 2
Receiver
To watch VCR.
(VTR mode 1)
DVD
Receiver
To watch DVD.
MD/TAPE
Receiver
To listen to Minidisc or
audio tape.
CD
Receiver
To listen to compact disc.
TUNER
Receiver
To listen to radio
programs.
SHIFT
Receiver
Press repeatedly to select
a memory page for
presetting radio stations
or tuning to preset
stations.
D.TUNING Receiver
Tuner station direct
key-in-mode.
BALANCE Receiver
Adjust the balance.
L/R
BASS
Receiver
Reinforce the bass.
BOOST
TREBLE
Receiver
Adjust the treble tone
+/–
quality.
MUTING Receiver
Mutes the sound from the
receiver.
BASS +/– Receiver
Adjust the bass tone
quality.
Note
When you press the function buttons (VIDEO 1,
VIDEO 2, DVD), the input mode of the TV might not
switch to the  corresponding input mode that you
want. In this case, press the TV/VIDEO button to
switch the input mode of the TV.
X
x
N
m
M
.
>
O
6
STR-DE185
Note : This set can be disassemble according to the following sequence.
SECTION 2
DISASSEMBLY
2-1. CASE
2-1.
CASE
(Page 6)
2-2.
FRONT PANEL SECTION
(Page 7)
2-3.
BACK PANEL
(Page 7)
SET
2-4.
MAIN BOARD
(Page 8)
Note : Follow the disassembly procedure in the numerical order given.
1
two screws
(case 3 TP2)
2
two screws
(case 3 TP2)
3
two screws
(case 3 TP2)
4
case
7
STR-DE185
2-2. FRONT PANEL SECTION
2-3. BACK PANEL
6
front panel section
4
two screws
(BVTP3 x 8)
1
CN4
2
CN5
3
CNP801
5
four screws
(BVTP3 x 8)
1
CN3
2
CNP901
3
CNP907
4
three screws
(BVTP3 x 8)
5
two screws
(BVTP3 x 8)
6
two screws
(BVTP3 x 8)
7
 screw
(BVTP3 x 8)
8
 screw
(BVTP3 x 8)
9
 back panel (DE1)
8
STR-DE185
2-4. MAIN BOARD
4
two screws
(BVTP3 x 8)
5
screw
(BVTP3 x 8)
8
MAIN board
6
screw
(BVTP3 x 8)
7
3
two screws
(BVTP3 x 8)
1
CNP904
2
CNP905
9
STR-DE185
SECTION 3
TEST MODE
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:
1. While pressing the five function buttons of [VIDEO 1], [VIDEO 2],
[MD/TAPE], [CD] and [TUNER] simultaneously, press the  
?/1
button to turn the power ON.
2. The FL tube will illuminate in half light on. The following dis-
play will be repeated whenever the five function buttons are
pressed.
  • Operation of function buttons
3. Press any button other than the function buttons to release the
check mode.
AUTO-BETICAL Check Mode (AEP, UK models)
To auto-scanning and memories of RDS station.
Procedure:
1. While pressing the [MEMORY/ENTER] button, press the  
?/1
button to turn the power ON.
2. The message “AUTO-BETICAL SELECT” are scrolled.
AM Tuning Interval Selection Mode (US model)
Either 9 kHz step or 10 kHz step can be selected for the AM tuning
interval.
Procedure:
1. While pressing the [TUNING/CHAR  +] button, press the  
?/1
button to turn the power ON.
2. Either the message “9k STEP” or “10k STEP” appears.
3. Select the desired step.
Software Version Display Mode
The software version is displayed.
Procedure:
1. While pressing the two buttons of [SPEAKERS B] and [VIDEO 1]
simultaneously, press the  
?/1
  button to turn the power ON.
2. The software version is displayed.
all light on      half light on 1      half light on 2      all light off
ex.)
US model
:  U   
*.**
 
AEP, UK model :  CE   
*
.
**
Area
Shift version
10
STR-DE185
SECTION 4
DIAGRAMS
1 to 7
DIG7 to 1
O
Digit drive signal output to the fluorescent indicator tube (FL201).
8
+5V
Power supply pin (+5 V)
9
CL
O
Serial clock signal output to FM/AM tuner pack.
10
DO
O
Serial data signal output to FM/AM tuner pack.
11
DI
I
Serial data signal input from FM/AM tuner pack.
12
CE
O
Serial chip enable signal output to FM/AM tuner pack.
13
VOL DATA
O
Serial data signal output to sound control IC.
14
VOL CE
O
Serial clock signal output to sound control IC.
15
RDS DATA
I
RDS data signal input from FM/AM tuner pack. (AEP, UK model only)
16
PROTECTOR
I
Overload detection signal input
17
RESET
I
Reset signal input
18
TUNED
I
TUNED indicator detection signal input from FM/AM tuner pack.
19
STEREO
I
STEREO indicator detection signal input from FM/AM tuner pack.
20
AVSS
Analog ground
21
VERSION
I
Destination select signal input (Fixed at H: US model, L: AEP, UK model)
22
FM SIGNAL OUT
I
FM/AM signal meter voltage detection signal input from FM/AM tuner pack.
(AEP, UK model only)
23 to 28
AD6 to 1
I
Function keys signal input
29
AVDD
A/D converter power supply pin (+5 V)
30
AVREF
A/D converter reference voltage input (+5 V)
31
NC
Not used. (Connect to AVREF pin in this set)
32
OPEN
Not used. (Open)
33
GND
Ground
34
X1
I
Master clock input (4.19 MHz)
35
X2
O
Master clock output (4.19 MHz)
36
REC SW1
O
VIDEO 1 ON/OFF signal output
37
REC SW2
O
MD/TAPE ON/OFF signal output
38, 39
VOL A, B
I
Master volume JOG data input A, B
40
FUNC.MUTE
O
Not used. (Fixed at L in this set)
41
CK
O
Serial clock signal output to electoric volume IC.
42
DATA
O
Serial data signal output to electoric volume IC.
43
STB
O
Serial data strobe signal output to electoric volume IC.
44
SYS.POWER
I
System power signal input
45
AC MUTE
O
A-Class mute signal output
46
RDS INT
I
RDS clock signal input from FM/AM tuner pack. (AEP, UK model only)
47
STOP
I
Stop signal input from reset signal generator IC.
48
VSS
Ground
49
SIRCS
I
Sircs signal input from remote control receiver IC.
50
TUNER MUTE
O
Muting control signal output to FM/AM tuner pack.
51
NC
Not used. (Open)
52
+5V
Power supply pin (+5 V)
53
BASS B. LED
O
BASS BOOST LED drive signal output
54
SPK A LED
O
SPEAKERS A LED drive signal output
55
SPK B LED
O
SPEAKERS B LED drive signal output
4-1. IC PIN DESCRIPTION
• IC201  µPD78044FGF-200-3B9 (SYSTEM CONTROLLER, FL DRIVER)
Pin No.
Pin Name
I/O
Pin Description

Download Sony STR-DE185 Service Manual (Repair Manual)

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