SEN-561, SEN-561A, SEN-T581, ST-JX661, ST-SE200 — Sony Audio Service Manual (repair manual)

Model
SEN-561 SEN-561A SEN-T581 ST-JX661 ST-SE200
Pages
14
Size
187.04 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / S/M ST-JX661/SE200 96 US CAN E
File
sen-561-sen-561a-sen-t581-st-jx661-st-se200.pdf
Date

View Sony SEN-561 / SEN-561A / SEN-T581 / ST-JX661 / ST-SE200 Service Manual online

ST-JX661/SE200
FM STREO/FM-AM TUNER
US  Model
Canadian  Model
ST-JX661
AEP  Model
UK  Model
E  Model
Australian  Model
ST-JX661/SE200
Chinese  Model
ST-SE200
SERVICE MANUAL
MICROFILM
SPECIFICATIONS
Photo : ST-JX661
FM tuner section
Frequency range
87.5–108  MHz
Antenna terminals
75 ohms, unbalanced
Intermediate frequency
10.7 MHz
Sensitivity
at 50 dB quieting (mono) 22.1 dBf, 7
µ
V/75
 (stereo) 42.1dBf, 7
µ
V/75
Usable sensitivity (IHF)
19.5 dBf, 5
µ
V/75
at 75 kHz deviation
S/N
80 dB (mono), 75 dB (stereo)
Harmonic distortion
at 1 kHz
0.3% (mono), 0.5% (stereo)
Frequency response
30 Hz–15 kHz
(+0.5/–2.0 dB)
Separation
35 dB at 1 kHz
Selectivity
55 dB at 400 kHz
Output
at 75 kHz deviation
775 mV, 4.7 kilohms
AM tuner section
Frequency range
US, Canadian model :
   531–1,710 kHz (9 kHz)
   530–1,710 kHz (10 kHz)
AEP, UK, German, Italian model :
   522–1,611 kHz (9 kHz)
E, Singapore, Australian, Chinese, Malaysia,
Saudi  Arabia model :
   531–1,602 kHz (9 kHz)
   530–1,710k Hz (10 kHz)
Intermediate frequency
450 kHz
Usable sensitivity
(with AM loop antenna) AM : 500
µ
V/m
Signal-to-noise ratio
54 dB (500mV/m, 999 kHz)
Harmonic distortion
0.5 % (50 mV/m, 400Hz)
Selectivity
50 dB
General
Power requirements
US, Canadian model :
   120 V AC, 60 Hz
AEP, German, Italian model :
   220-230 V AC, 50/60Hz
UK, Australian model :
   240 V AC, 50/60Hz
E, Singapore, Chinese, Malaysia,
Saudi  Arabia model :
   110-120 V/220-240 V AC,
   50/60 Hz adjustable
Power consumption
7 W
Dimensions
430 x 82 x 279 mm (w/h/d) (17 x
3
1
/
4
 x 11 inches)
Mass
Approx. 2.4 kg (5 lb 4 oz)
Supplied accessorise
Audio cord (1)
AM loop antenna (1)
FM wire antenna (1)
Design and specifications are subject to change without notice.
– 2 –
TABLE OF CONTENTS
Section
Title
Page
Specifications ................................................................................ 1
1. GENERAL
Location of Controls ............................................................... 3
2. ADJUSTMENTS
............................................................... 4
3. EXPLANATION OF IC TERMINALS
.......................... 5
4. DIAGRAMS
4-1. Circuit Boards Location ................................................... 7
4-2. Printed Wiring Boards ..................................................... 8
4-3. Schematic Diagram ........................................................ 11
5. EXPLODED VIEW
5-1. Front Section .................................................................. 15
6. ELECTRICAL PARTS LIST
........................................ 17
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 re-
turn to chassis, must not exceed 0.5mA (500 microampers).
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 0.75V,
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)
        
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
AC 
Voltmeter
(0.75V)
0.15   F
µ
1.5k
To Exposed Metal
Parts on Set
MODEL NO.
ST-JX661
ST-SE200
FM STEREO/FM-AM TUNER
MODEL IDENTIFICATION
– Model Number Label –
US, Canadian model : AC 120
60Hz
 UK, Australian model : AC 240
50Hz
AEP, German, Italian model : AC 220–230V
50Hz
E, Singapore, Chinese,
Malaysia, Saudi Arabia model : AC 110–120 V/220–240 V
50/60 Hz
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 
! SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 
! OR DOTTED LINE WITH
MARK 
! 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.
– 3 –
SECTION 1
GENERAL
1 2 3
4
5
6
7
8
1 POWER button
2 MEMORY SCAN button
3 STEREO/MONO button
5 Numeric buttons
6 TUNING buttons
7 MEMORY button
4 Display window
8 BAND button
LOCATION OF CONTROLS
– 4 –
 TUNER SECTION
Note 1 : The adjustment should be performed in the publication.
(AM 
n FM)
Note 2 : As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
AM Section Adjustment
Setting :
   
set
loop antenna A
loop antenna B
60cm
AM RF signal
generator
Carrier frequency : 1,050kHz (US, Canadian)
 
999kHz (EXCEPT US, Canadian)
Modulation : 400Hz, 30% modulation
FM Section Adjustment
Setting :
            
set
FM ANTENNA terminal (TM1)
75
Ω 
coaxial
FM RF signal
generator
Carrier frequency : 98MHz 
Modulation : 1kHz, 75kHz deviation
AM Tuned Indication Lighting Level Adjustment
Band : AM
Procedure :
1. Set loop antenna A so that the loop antenna B input level becomes
316.2
µ
V (50dB
µ
)
2. Tune the set to 1,050kHz (US, Canadian) or 999kHz (EXCEPT
US, Canadian).
3. Adjust RV41 so that the TUNED light up.
4. Confirm that the TUNED light off with AM RF signal generator
output level set at 251.2
µ
V (48dB
µ
)
5. Confirm the FM tuned indication lighting level and adjust if nec-
essary.
Adjustment Location : TUNER board
SECTION 2
ADJUSTMENTS
FM Tuned Indication Lighting Level Adjustment
Band : FM
Procedure :
1. Supply a 31.6
µ
V (30dB
µ
) 98 MHz signal to the ANTENNA ter-
minal (TM1).
2. Tune the set to 98MHz.
3. Adjust RV42 so that the TUNED light up.
4. Confirm that the TUNED light off with FM RF signal generator
output level set at 25.1
µ
V (28dB
µ
).
Adjustment Location : TUNER board
RV41 : AM Tuned Level
RV42 : FM Tuned Level
[ TUNER BOARD ]
 
– Component side –
Page of 14
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Here you can view online or download Sony SEN-561 / SEN-561A / SEN-T581 / ST-JX661 / ST-SE200 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony SEN-561 / SEN-561A / SEN-T581 / ST-JX661 / ST-SE200 Audio. Information contained in Sony SEN-561 / SEN-561A / SEN-T581 / ST-JX661 / ST-SE200 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).