Download Sony MP3 User's Manual

AC ADAPTOR
AC-DN2B
MAINTENANCE MANUAL
1st Edition
Serial No. 10001 and Higher
! WARNING
This manual is intended for qualified service personnel only.
To reduce the risk of electric shock, fire or injury, do not perform any servicing other than that
contained in the operating instructions unless you are qualified to do so. Refer all servicing to
qualified service personnel.
! WARNUNG
Die Anleitung ist nur für qualifiziertes Fachpersonal bestimmt.
Alle Wartungsarbeiten dürfen nur von qualifiziertem Fachpersonal ausgeführt werden. Um die
Gefahr eines elektrischen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind bei
Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen. Andere als die angegeben
Wartungsarbeiten dürfen nur von Personen ausgeführt werden, die eine spezielle Befähigung
dazu besitzen.
! AVERTISSEMENT
Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien. Afin
de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les
réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres.
Pour toute réparation faire appel à une personne compétente uniquement.
AC-DN2B
Table of Contents
Manual Structure
Purpose of this manual ........................................................................................ 3 (E)
Related manual .................................................................................................... 3 (E)
Contents ............................................................................................................... 3 (E)
1. Service Overview
1-1.
1-2.
1-3.
1-4.
1-5.
1-6.
1-7.
1-8.
1-9.
Connectors and Cable ........................................................................... 1-1 (E)
1-1-1. Recommended DC OUT Cable ............................................ 1-1 (E)
1-1-2. Recommended Power Cords ................................................ 1-1 (E)
1-1-3. Connector Input/Output Signals ........................................... 1-2 (E)
Operating Environment ......................................................................... 1-2 (E)
Checking the Fan Operation .................................................................. 1-2 (E)
Removing the Cabinets ......................................................................... 1-3 (E)
Replacing the Fuse ................................................................................ 1-4 (E)
Replacing the Fan .................................................................................. 1-4 (E)
Notes on Repair Parts ............................................................................ 1-5 (E)
Printing of the Reference Numbers on Printed Boards ......................... 1-5 (E)
Optional Fixture .................................................................................... 1-5 (E)
2. Electrical Alignment
2-1.
2-2.
2-3.
Preparations ........................................................................................... 2-1 (E)
Output Voltage Adjustment .................................................................. 2-1 (E)
Note after Adjustment ........................................................................... 2-1 (E)
3. Spare Parts
3-1.
3-2.
3-3.
3-4.
AC-DN2B
Exploded Views .......................................................................................... 3-1
Electrical Parts List ..................................................................................... 3-3
Supplied Accessory ..................................................................................... 3-4
Optional Fixture .......................................................................................... 3-4
1 (E)
4. Diagrams and Board Layouts
Overall .................................................................................................................... 4-1
MAIN ..................................................................................................................... 4-2
SUB01 .................................................................................................................... 4-3
SUB02 .................................................................................................................... 4-3
Frame ...................................................................................................................... 4-4
2 (E)
AC-DN2B
Manual Structure
Purpose of this manual
This manual is the maintenance manual for AC Adaptor AC-DN2B.
This manual describes the information items on maintenance, and items that premise
the service based on the components parts such as alignment, schematic diagram,
board layout and spare parts list, assuming use of service engineers.
Related manual
Besides this maintenance manual, the following manual is available for this unit.
. Operation Manual (Supplied with this unit)
This manual is necessary for application and operation of this unit.
Part number : 3-204-884-0X
Contents
The following are summaries of the each section for understanding the manual.
Section 1 Service Overview
Describes information about connector input/output signals, recommended power
cords, and replacement of part.
Section 2 Electrical Alignment
Describes electrical adjustment.
Section 3 Spare Parts
Describes parts list, exploded view, and supplied accessories used in the unit.
Section 4 Diagrams and Board Layouts
Describes block diagram, schematic diagram and board layouts.
AC-DN2B
3 (E)
Section 1
Service Overview
1-1. Connectors and Cable
1-1-2. Recommended Power Cords
1-1-1. Recommended DC OUT Cable
The following power cords are available separately for this
unit. See the following table to determine the proper
power code for your location.
When connecting a cable to the DC OUT connector (XLR,
4P), be sure to use the specified connector/complete cable
assemblies.
Connection Connector
. XLR 4P, MALE : 1-508-369-11
Connection Cable
. CORD WITH CONNECTOR : 1-790-446-11
(0.26 m, supplied with the unit)
. CCDD-X2 (2 m, option)
SONY POWER CORD (2.4 m) DK-2401L (Angle type)
Fig.
Power cord
Rated current
Rated voltage
1
DK-2401L (UC)
7A
125 V
2
P/N 1-557-377-11
10 A
3
P/N 1-782-167-11
7A
4
P/N 1-782-165-11
10 A
5
P/N 1-782-168-11
10 A
6
P/N 1-782-164-11
250 V
250 V
1
2
3
4
5
6
AC-DN2B
1-1 (E)
1-1. Connectors and Cable
1-2. Operating Environment
1-3. Checking the Fan Operation
1-1-3. Connector Input/Output Signals
1-2. Operating Environment
AC IN
AC 100 V to 240 V, 200 W
Operating Temperature : 0 dC to +40 dC
Storage Temperature : _5 dC to +45 dC
Humidity :
No condensation
DC OUT (4P FEMALE)
1-3. Checking the Fan Operation
4
1
3
2
_ EXT VIEW _
Pin No.
Signal
Specifications
1
GND
GND for UNREG
2
NC
No connection
3
NC
No connection
4
DC OUT
+16.4 to +17.0 V, 9 A MAX
DC OUT (5P FEMALE)
1
2
3
4
5
The unit is provided with a fan. It is designed to run
automatically when temperature of the heat sink inside the
equipment exceeds over 55dC. If there is any doubt that the
fan or fan motor control circuit fails, check the fan operation as follows.
Equipment Required
. Electric Load
Hewlett-Packard
HP6051A + HP60501B
1. Set the electric load to 9 A in the CC (constant current)
mode.
2. Connect the electric load as follows and make sure that
the fan starts up within ten minutes.
_ EXT VIEW _
<Connection for 5P terminal>
Pin No.
Signal
Specifications
1
GND
GND for DC OUT
2
NC
No connection
3
NC
4
NC
5
DC OUT
To
Electric Load
Lower cover
(_)
(+)
+16.4 to +17.0 V, 9 A MAX
DC OUT (3P)
1
2
3
_ EXT VIEW _
Pin No.
Signal
Specifications
1
BATT (_) OUT
GND for DC OUT
2
BATT (+) OUT
+16.5 to +16.9 V, 2.2 A MAX
3
RID IN
SENS
1-2 (E)
AC-DN2B
1-4. Removing the Cabinets
1-4. Removing the Cabinets
1. Remove the four screws (B3 x 6) securing the BKWL601 and loosen the two screws (PSW3 x 8).
B3 x 6
4. Remove the screw securing the earth wire and disconnect the harnesses from the connector (CN1) on the
main board.
5. Disconnect the harness from the connectors (CN252,
CN253) on the SUB02 board.
B3 x 6
BKW-L601
SUB 02 board
CN253
CN252
SMP
4x8
PSW3 x 8
CN1
Earth wire
Main board
6. Assemble the parts in reverse order of the disassembling procedure.
2. Remove the four screws (PSW3 x 8) and remove the
upper case.
3. Remove the two screws (B3 x 6) securing the shield plate.
PSW3 x 8
PSW3 x 8
Upper case
Shield plate
B3 x 6
AC-DN2B
1-3 (E)
1-5. Replacing the Fuse
1-6. Replacing the Fan
1-5. Replacing the Fuse
1-6. Replacing the Fan
w
The fuse is critical to safe operation. For replacement, be
sure to use the specified part.
Fan used in the unit is a periodic replacement part. For
replacement, be sure to use the specified part.
Sony P/N : ! 9-885-009-46
Sony P/N : 1-763-098-11
Recommended Replacement Period : Every five years
5 A 250 V
1. Remove the cabinets while referring to Section 1-4.
2. Remove the three spacer 1s and the one spacer 2.
1. Remove the cabinets while referring to Section 1-4.
2. Pull the fan socket out of the upper case.
Spacer 1
Spacer 1
Spacer 2
Upper case
Spacer 1
Fan socket
3. Raise the switching regulator and remove the two solderings as shown in the figure. Then, replace the fuse.
Switching
regulator
Fuse
Remove the
solderings.
4. Assemble the unit in the reverse order of removal.
Spacer 1/Spacer 2 tightening torque : 4 N.m (40 kgf.cm)
1-4 (E)
AC-DN2B
1-6. Replacing the Fan
1-7. Notes on Repair Parts
1-8. Printing of the Reference Numbers on Printed Boards
1-9. Optional Fixture
3. Remove the two screws and remove the fan.
PTP3 x 8
1-7. Notes on Repair Parts
1. Safety Related Components Warning
w
Components marked ! are critical to safe operation.
Therefore, specified parts should be used in the case of
replacement.
2. Standardization of Parts
Some repair parts supplied by Sony differ from those
used for the unit. These are because of parts commonality and improvement.
Parts list has the present standardized repair parts.
3. Stock of Parts
Parts marked with “o” at SP (Supply Code) column of
the spare parts list may not be stocked. Therefore, the
delivery date will be delayed.
4. Install a new fan in the reverse order of removal.
Note at installation
Install the fan to the fan socket with care so that air flows
in the direction of the arrow.
4. Harness
Harnesses with no part number are not registered as
spare parts.
In need of repair, get components shown in the list and
repair using them.
1-8. Printing of the Reference Numbers
on Printed Boards
PTP3 x 8
Only the lower two digits of the reference numbers of the
SUB01 board and SUB02 board are shown respectively on
the printed board. Note that these indications differ from
those on the schematic diagram, block diagram and
electrical parts list.
(example)
Board
Indication on the
printed board
Ref.No.
in the manual
SUB01
CN01
CN101
SUB02
VR51
VR251
Air flows
1-9. Optional Fixture
The following special driver is separately available as a
fixture to remove the screws securing the V shoe to the
unit.
AC-DN2B
Description
Sony Part No.
5-wing screwdriver DF-018 (for M3)
J-6530-180-A
1-5 (E)
Section 2
Electrical Alignment
2-1. Preparations
2-2. Output Voltage Adjustment
Equipment Required
. Electric Load
Hewlett-Packard
. DC Voltmeter
Preparation
. Set the electric load to 9 A in the CC (constant current)
mode.
Test Points :
Pins (+), (_)/5P terminal
Adj. Point :
1VR251 (SUB02 board)
Specifications : 16.7 ± 0.3 V
HP6051A + HP60501B
Connection
<Connection for 5P terminal>
To
Electric Load
Lower cover
(_)
(+)
To
DC Voltmeter
VR251
1
SUB02 board (B side)
2-3. Note after Adjustment
After adjustment has been completed, be sure to lock
1VR251 with paint.
AC-DN2B
2-1 (E)
AC Adaptor
Section 3
Spare Parts
3-1. Exploded Views
B3 x 6
SMP
4x8
B3 x 6
a
b
c
*2
7
10
B3 x 6
*1
PSW
3x8
6
8
B3 x 6
8
c
*1
Precision
P 2.6 x 6
PTP2.6 x 6
a
b
P2 x 4
11
NUT4,
HEXAGON CAP
1
14
12
15
*2
2
PTP3 x 8
3
13
4
5
No.
Part No.
SP Description
1
2
3
4
5
1-509-185-31
1-763-098-11
2-378-311-01
3-193-925-01
3-193-926-01
s
s
o
o
o
CONNECTOR (RECEPTACLE) 4P
FAN, DC (40 SQUARE)
NUT(XLR), PLATE
SHOE (AC), V
SCREW (M3X7), 5LR PLATE SMALL
6
7
8
9
10
3-692-186-01
3-724-723-01
9-885-004-70
9-885-009-68
9-885-009-69
s
s
o
o
o
HOLDER,CABLE
RUBBER (BATT), DROP PROTECTION
HARNESS ASSY, INLET(WITH SW)
CASE, UPPER
HARNESS ASSY, OUTPUT
No.
Part No.
SP Description
11
12
13
14
15
9-885-009-71
9-885-009-72
9-885-009-73
9-885-009-74
9-885-009-75
o
o
o
o
o
LENS, LED
SOCKET, FAN
CASE, LOWER
CONNECTOR ASSY, BATTERY
HARNESS ASSY, XLR
7-627-553-47
7-627-556-77
7-682-547-09
7-684-221-00
7-685-752-09
s
s
s
s
s
SCREW PRECISION +P2X4
SCREW PRECISION +P2.6X6 TYPE1
SCREW +B3X6
NUT 4, HEXAGON CAP
SCREW +PTT3X8
7-685-792-09 s SCREW +PTP2.6X6
AC-DN2B
3-1
Battery Adaptor
101
108
110
P2 x 3
107
P2 x 3
P2 x 3
109
B3 x 5
B3 x 5
111
104
103
P2.6 x 4
113
106
P2.6 x 4
114
105
PSW3 x 8
112
102
P2.6 x 4
P2.6 x 4
P2.6 x 4
No.
Part No.
101
102
103
104
105
A-8278-025-C
1-766-377-12
3-606-344-01
3-606-345-01
3-606-346-02
s
s
o
o
o
MOUNT, V ASSY
CONNECTOR, BATTERY
PLATE (ID)
SEAL
SEAL (FRONT)
106
107
108
109
110
3-669-596-00
3-679-648-02
3-679-688-02
3-679-690-02
3-680-952-01
s
o
o
o
o
WASHER (2.3), STOPPER
SPRING, COMPRESSION
LEVER, RELEASE
MOUNT, V
KNOB, RELEASE LEVER
3-2
SP Description
No.
Part No.
SP Description
111
112
113
114
3-680-996-02
3-680-997-02
3-680-998-02
3-680-999-02
o
o
o
o
PLATE
INSULATOR
PLATE (+)
PLATE (-)
7-627-553-38
7-627-556-38
7-682-546-09
7-682-948-01
s
s
s
s
SCREW, PRECISION +P 2X3
SCREW +P 2.6X4.0
SCREW +B 3X5
SCREW +PSW 3X8
AC-DN2B
3-2. Electrical Parts List
---------MAIN BOARD
---------Ref.No.
or Q’ty Part No.
C1
C2
C3
C4
C5
!
!
!
!
(MAIN BOARD)
SP Description
9-885-009-14
9-885-009-15
9-885-009-16
9-885-009-16
9-885-009-17
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
1uF/AC250
0.22uF/AC250
1500PF/AC250
1500PF/AC250
470PF/AC250
C6
C7
C8
C9
C10
9-885-009-18
9-885-009-18
9-885-009-19
9-885-009-20
9-885-009-21
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
0.47uF/450V
0.47uF/450V
270uF/450V
47uF/50V
100uF/50V
C11
C12
C13
C14
C15
9-885-009-22
9-885-009-23
9-885-009-24
9-885-009-25
9-885-009-25
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
47uF/50V
220uF/25V
15000PF/630V
1000PF/630V
1000PF/630V
C17
C18
C19
C20
C21
9-885-009-26
9-885-009-27
9-885-009-28
9-885-009-29
9-885-009-30
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
0.22uF/25V
4700PF/50V
0.1uF/50V
0.1uF/50V
10000PF/50V
C22
C23
C24
C25
C26
9-885-009-31
9-885-009-31
9-885-009-31
9-885-009-31
9-885-009-32
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
470PF/630V
470PF/630V
470PF/630V
470PF/630V
0.22uF/25V
C27
C28
C29
C30
C31
9-885-009-32
9-885-009-33
9-885-009-34
9-885-009-35
9-885-009-36
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
0.22uF/25V
10000PF/50V
470PF/50V
10000PF/50V
4700PF/50V
C32
C33
C34
C51
C52
9-885-009-37
9-885-009-37
9-885-009-37
9-885-009-38
9-885-009-38
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
10000PF/630V
10000PF/630V
10000PF/630V
680uF/25V
680uF/25V
C53
C54
C55
C56
C57
9-885-009-38
9-885-009-39
9-885-009-40
9-885-009-41
9-885-009-41
s
s
s
s
s
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
680uF/25V
100uF/25V
10000PF/AC250
470PF/630V
470PF/630V
C58
C59
C60
9-885-009-42 s CAPACITOR 0.1uF/50V
9-885-009-43 s CAPACITOR 1uF/25V
9-885-009-43 s CAPACITOR 1uF/25V
D1
D2
D3
D4
D5
9-885-009-05
9-885-009-06
9-885-009-07
9-885-009-07
9-885-009-08
s
s
s
s
s
DIODE
DIODE
DIODE
DIODE
DIODE
D5SB60
SF10L60U
U1DL44A-TE12L
U1DL44A-TE12L
U1JU44-TE12L
D6
D7
D8
D9
D10
9-885-009-09
9-885-009-09
9-885-009-09
9-885-009-09
9-885-009-09
s
s
s
s
s
DIODE
DIODE
DIODE
DIODE
DIODE
1SS184-TE85L
1SS184-TE85L
1SS184-TE85L
1SS184-TE85L
1SS184-TE85L
D11
D12
D13
D14
D51
9-885-009-09
9-885-009-09
9-885-009-09
9-885-009-10
9-885-009-11
s
s
s
s
s
DIODE
DIODE
DIODE
DIODE
DIODE
1SS184-TE85L
1SS184-TE85L
1SS184-TE85L
U2JC44
FCH30A06
AC-DN2B
Ref.No.
or Q’ty Part No.
SP Description
D52
9-885-009-11 s DIODE FCH30A06
F1
! 9-885-009-46 s FUSE 215005ME600
IC1
IC2
IC3
IC4
9-885-008-98
9-885-008-97
9-885-008-99
9-885-009-00
s
s
s
s
IC
IC
IC
IC
L1
L2
L3
L51
! 9-885-009-76
9-885-009-77
9-885-009-78
9-885-009-79
s
s
s
s
COIL
COIL
COIL
COIL
9-885-009-01
9-885-009-02
9-885-009-02
9-885-009-03
9-885-009-04
s
s
s
s
s
FET 2SK2837
FET 2SK2842
FET 2SK2842
TRANSISTOR 2SA1298-TE85L
TRANSISTOR RN2404
Q1
Q2
Q3
Q4
Q5
RY1
SW51
T1
T2
TA78M18S
IR2101
MC34262D
NJM431U-TE1
! 9-885-009-80 s RELAY
9-885-009-47 s SWITCH OHD5R-60B
! 9-885-009-44 s TRANSFORMER
9-885-009-45 s TRANSFORMER
TH51 ! 9-885-009-13 s THERMISTOR
ZD1
ZD2
9-885-009-12 s DIODE 02CZ20
9-885-009-12 s DIODE 02CZ20
3-3
----------SUB01 BOARD
----------Ref.No.
or Q’ty Part No.
3-3. Supplied Accessory
Ref.No.
or Q’ty Part No.
SP Description
IC101
9-885-009-48 s IC MC34067P
Q101
Q102
Q103
Q104
9-885-009-49
9-885-009-49
9-885-009-50
9-885-009-51
ZD101
9-885-009-52 s DIODE 02CZ6.8Y
s
s
s
s
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
2SC2712-TE85L
2SC2712-TE85L
2SA1162-TE85L
DTC114EKA-T146
1pc
SP Description
1-790-446-11 s CORD, CONNECTION (XLR TYPE 4P)
3-4. Optional Fixture
Part No.
SP Description
J-6530-180-A o SCREW DRIVER, 5-WING (FOR M3)
----------SUB02 BOARD
----------Ref.No.
or Q’ty Part No.
SP Description
D251
D252
D253
9-885-009-62 s DIODE FCH30A06
9-885-009-63 s DIODE 1SS184-TE85L
9-885-009-64 s DIODE 1SS181-TE85L
IC251
IC252
IC253
9-885-009-53 s IC NJM2903M-TE2
9-885-009-54 s IC NJM2904M-TE2
9-885-009-55 s IC NJM431U-TE1
PC201 ! 9-885-009-56 s PHOTO COUPLER TLP621D4-GB-LF2
PC202 ! 9-885-009-56 s PHOTO COUPLER TLP621D4-GB-LF2
PC203 ! 9-885-009-56 s PHOTO COUPLER TLP621D4-GB-LF2
Q251
Q252
Q253
Q254
Q255
9-885-009-57
9-885-009-58
9-885-009-59
9-885-009-60
9-885-009-61
s
s
s
s
s
FET 2SJ334
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
Q256
9-885-009-61 s TRANSISTOR 2SA1162-TE85L
ZD251
ZD252
ZD253
9-885-009-65 s DIODE HZM5.1N B2-TL
9-885-009-66 s DIODE HZM18N B2-TL
9-885-009-65 s DIODE HZM5.1N B2-TL
2SC2655 TPE6
DTC114EKA-T146
2SC2712-TE85L
2SA1162-TE85L
----------SUB03 BOARD
----------Ref.No.
or Q’ty Part No.
D301
SP Description
9-885-009-67 s DIODE TLG223
----FRAME
----Ref.No.
or Q’ty Part No.
SP Description
HN001
9-885-009-69 o
HN002 ! 9-885-009-70 o
HN003
9-885-009-74 o
HN004
9-885-009-75 o
3-4
HARNESS ASSY, OUTPUT
HARNESS ASSY, INLET (WITH SW)
CONNECTOR ASSY, BATTERY
HARNESS ASSY, XLR
AC-DN2B
Overall
Overall
Section 4
Diagrams and Board Layouts
AC-DN2B (SY) : S/N 10001 and Higher
!
!
!
!
!
4
1
3
!
2
!
!
MAIN
Overall
LOT NO. 085-
AC-DN2B
4-1
4-1
MAIN
AC-DN2B (SY) : S/N 10001 and Higher
MAIN
MAIN -A SIDE-
4-2
MAIN -B SIDE-
4-2
AC-DN2B
SUB01, SUB02
SUB01, SUB02
AC-DN2B (SY) : S/N 10001 and Higher
SUB01 -A SIDE-
AC-DN2B (SY) : S/N 10001 and Higher
AC-DN2B
SUB01 -B SIDE-
SUB02 -A SIDE-
SUB02 -B SIDE-
4-3
4-3
Frame
Frame
AC-DN2B (SY) : S/N 10001 and Higher
1
D5
!
SW1
CN1
D51
!
L51
CN52
2
1
C22
Q2
F1
AC(H)IN
GND
AC(C)IN
R37
IC2
C26
!
1
8
2
3
4
7
6
5
ZD01
HN004
+
GND
C23
S
R38
C1
HN002
R46
R45
L1 !
CN51
R56
Q3
4
C59
R39
C51
C24
C34
C33
C32
C52
C53
R55
C60
3
2
C54
R40
D13
ZD02
S
!
1
C25
DC OUT
NC
NC
GND
5
4
3
2
1
DC OUT
NC
NC
NC
GND
3
2
1
RID IN
BATT(+)OUT
BATT(-)OUT
HN003
+
+
GND
GND
T2
RY1
4
3
2
1
R9
R8
9
R10
D10
8
4
D11
D52
C109
D9
R11
C29
R44
C102
D251
C30
R122
6
5
!
R251
4
3
T1
R109
7
R253
C101
C56
C107
8
R110
C4
R254
R112
C28
C3
C2
Q251
R258
R256
R255
C57
R277
R42
IC1
R275
D4
PC202
D12
C255
(2/2)
R41
10
3
!
R54
1
2
16 15 14 13 12 11 10
ZD251
R264
R111
R113
!
C254
R43
4
C110
!
2
1
R257
5
+
+
SENS
GND
GND
S
!
R51
R271
2
3
5
SW51
9
R289
IC101
R276
R260
C252
VR251
C258
R290
2
HN001
CN252
C13
R108 C108
1
5
6
7
IC252
R263
R52
IC252
D252
(1/2)
(2/2)
C11
C12
IC253
Q254
C27
R278
R272
TH51
1 2 3 4 5 6 7 8
!
7
C260
C58
ZD252
R262
PC201
(2/2)
R103
11
R279
R259
R261
!
C105
C251
1
2
R102
6
R106 C106
R104 R107
3
C103 R101
SUB01
3
C104
R105
9
R268
!
PC203
FAN
(2/2)
R269
R265
R291 C259
R270
R47
D253
R286
R285
5
6
7
Q253
R292
R252
R115
R6
R7
C113
D14
R266
IC251
R114
(2/2)
R121
Q103
D1
L3
L2
D2
Q104
2
Q256
Q255
2
3
R293
5
Q252
1
R281
9
R267
R120
Q1
IC251
Q101
R118
ZD101
(1/2)
Q102
R12
R284
R4
D8
R282 C261
ZD253
C253
C256 R280
S
R17
D3
R119
C112
R117 C111 C114 C115
R13
C257
R287
C14
C9
4
C8
D7
R36
R288
C6
C7
R1
R14
C15
R2
R35
R3
R16
3
1
2
R5
PC203
(1/2)
C5
R202
13
!
PC202
R21
Q4
(1/2)
R26
12
Q5
R31
!
IC3
R22
R27
11
R18
C20
1
2
8
7
3
4
6
5
R201
R23
R19
R32
C17
PC201
(1/2)
R28
C202
IC4
R20
R24
R29
R25
R30
C201
D6
!
10
C10
R34
C18
C31
R15
C21
C16
C19
C55
SUB02
5
MAIN
Frame
4-4
A
B
C
D
4-4
AC-DN2B
E
F
G
H
4
1
3
2
For the U.S.A. and Canada
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safety checks before
releasing the set to the customer :
Check the 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. 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 lowvoltage 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 2 V AC range
are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
0.15 µF
1.5 kZ
AC
voltmeter
(0.75V)
Earth Ground
Fig A. Using an AC voltmeter to check AC leakage.
AC-DN2B
AC-DN2B (SY) J, E
9-968-578-01 (1)
Sony Corporation
Communication System Solutions Network Company
Printed in Japan
2000. 10 16
©2000