ST-SE370 — Sony Audio Service Manual (repair manual)

Model
ST-SE370
Pages
21
Size
1.22 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
st-se370.pdf
Date

View Sony ST-SE370 Service Manual online

SERVICE MANUAL
FM STEREO FM-AM TUNER
US Model
AEP Model
UK model
E Model
Australian Model
SPECIFICATIONS
ST-SE370
Ver. 1.1  2006.02
9-873-833-12
Sony Corporation
2006B05-1
Home Audio Division
© 2006.02
Published by Sony Techno Create Corporation
FM tuner section
Frequency range
87.5 - 108.0 MHz
(U.S. models: 100 kHz
step, other models: 50 kHz
step)
Aerial terminals
75 
Ω, unbalanced
U.S. models: F-TYPE
CONNECTOR,
other models: IEC-male
Intermediate frequency
10.7 MHz
Sensitivity
at 26 dB quieting (mono)
10.3 dBf, 0.9 
µV/75 Ω
at 46 dB quieting (stereo)
38.5 dBf, 23 
µV/75 Ω
Usable sensitivity (IHF)
10.3 dBf, 0.9 
µV/75Ω
S/N
at 40 kHz deviation
74 dB (mono), 69 dB
(stereo)
Harmonic distortion
0.09% (mono),
0.18% (stereo)
Frequency response
30 Hz - 15 kHz
(+0.5/–1.0 dB)
Separation
45 dB at 1 kHz
Selectivity
at 400 kHz
85 dB
at 300 kHz
70 dB
Output
at 40 kHz deviation
600 mV
AM tuner section
Frequency range
MW:
U.S. models:
530 - 1,710 kHz
(10 kHz step*)
Singaporean and Australian models:
531 - 1,710 kHz
(9 kHz step)
Other models:
531 - 1,602 kHz
(9 kHz step)
LW:
144 - 288 kHz
(1 kHz step)
Intermediate frequency
450 kHz
Usable Sensitivity
(with AM loop aerial)
MW:
200 
µV/m
LW:
700 
µV/m
Signal-to-noise ratio
MW:
54 dB
(50 mV/m, 999 kHz)
LW:
50 dB
(50 mV/m, 216 kHz)
Harmonic distortion
0.3% (50 mV/m,
400 Hz)
Selectivity
50 dB
General
Power requirements
U.S. models:
120 V AC, 60 Hz
Australian models:
230 V AC, 50 Hz
Other models:
230 V AC, 50/60 Hz
Power consumption
10 W
Dimensions
430 x 83 x 290 mm
(w/h/d)
Weight
2.5 kg
Supplied accessories
Audio cord (1)
AM loop antenna (1)
FM wire antenna (1)
* (U.S. models only.) You can change the AM tuning
interval to 9 kHz. After tuning in any AM station,
turn off the tuner. Hold down the numeric button 9
and press the POWER button. To reset the scale to
10 kHz, hold down the numeric button 0 and press
the POWER button to turn on the tuner. All preset
stations will be erased when you change the tuning
interval.
Design and specifications are subject to change
without notice.
2
ST-SE370
TABLE  OF  CONTENTS
1.
GENERAL
...................................................................
3
2.
DISASSEMBLY
2-1. Disassembly Flow ...........................................................
4
2-2. Case (407026) .................................................................
4
2-3. MAIN Board ...................................................................
5
3.
TEST  MODE
..............................................................
6
4.
ELECTRICAL  ADJUSTMENTS
.........................
8
5.
DIAGRAMS
5-1. Note for Printed Wiring Boards and
Schematic Diagrams .......................................................
9
5-2. Printed Wiring Boards – MAIN Section – ..................... 10
5-3. Schematic Diagram – MAIN Section – .......................... 11
5-4. Printed Wiring Boards – DISPLAY Section – ............... 12
5-5. Schematic Diagram – DISPLAY Section – .................... 13
5-6. IC Pin Function Description ........................................... 14
6.
EXPLODED  VIEWS
6-1. Case Section .................................................................... 15
6-2. Front Panel Section ......................................................... 16
6-3. Chassis Section ............................................................... 17
7.
ELECTRICAL  PARTS  LIST
............................... 18
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  PUB-
LISHED  BY  SONY.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are
suitable.  (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
3
ST-SE370
SECTION  1
GENERAL
This section is extracted from
instruction manual.
LOCATION  OF  CONTROLS
– Front Panel –
AUTO BETICAL SELECT (European model only)
qh
 (7, 12)
BAND qd (9, 10, 12)
CHARACTER 5 (11)
DIRECT 0 (9)
DISPLAY  3 (10, 11, 13)
ENTER 9 (9, 11, 12, 14)
FM MODE qf (9, 10)
MEMORY 2 (8, 11)
MENU 8 (9, 11, 14)
Numeric buttons qs (7–9)
POWER 1 (7, 8, 12)
PTY (European model only) qg (14, 15)
RETURN 7 (9)
SHIFT qa (8, 11)
TUNE MODE 6 (8, 10)
TUNING/SELECT 4 (7–12, 14)
1
2
3
4
5
6
7
8
9
0
1
2 3
5 6
4
7
8
9
0
qa
qs
qd
qf
qg
qh
1
FM ANTENNA terminal
2
AM ANTENNA terminal
3
LINE OUT jack
– Rear Panel –
ANTENNA
LINE  OUT
FM
U
75
  COAXIAL
R
L
AM
2
1
3
ST-SE370
4
• This set can be disassembled in the order shown below.
2-1.
DISASSEMBLY  FLOW
SECTION  2
DISASSEMBLY
Note:
 Follow the disassembly procedure in the numerical order given.
2-2.
CASE (407026)
2-2. CASE (407026)
(Page 4)
2-3. MAIN BOARD
(Page 5)
SET
1
two screws 
(case 3 TP2)
2
two screws 
(case 3 TP2)
3
three screws 
(case 3 TP2)
4
case (407026)
ST-SE370
5
2-3.
MAIN  BOARD
5
MAIN board
2
connector (CNP701)
2
connector (CNP702)
2
connector (CNP951)
2
connector (CNP901)
1
wire (flat type) (15 core)
(CN101)
3
screw 
(BV/RING)
3
screw 
(BVTP3 
×
 8 (S))
4
screw 
(BVTT3 
×
 6 (S))

Download Sony ST-SE370 Service Manual (Repair Manual)

Here you can view online or download Sony ST-SE370 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony ST-SE370 Audio. Information contained in Sony ST-SE370 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).