Sony Mp3 Player Accessories Ac Dn2B Users Manual Maintenance
AC-DN2B - Maintenance AC-DN2B - Maintenance
Sony MP3 Player Accessories AC-DN2B AC-DN2B - Maintenance
AC-DN2B to the manual d1ecc918-bdf2-4630-8ca9-0a98861dced7
2015-01-23
: Sony Sony-Sony-Mp3-Player-Accessories-Ac-Dn2B-Users-Manual-295358 sony-sony-mp3-player-accessories-ac-dn2b-users-manual-295358 sony pdf
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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 _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 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
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