Sony PBD-D50 Service manual

PBD-D50

RM-PBD1

SERVICE MANUAL

SPECIFICATIONS

US Model

Canadian Model

9-928-104-11

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PORTABLE DVD-ROM DRIVE

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety checks before releasing the set to the customer.

1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are "pinched" or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair . Point them out to the customer and recommend their replacement.

4. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

5. Check the line cord for cracks and abrasion. Recommend the replacement of any such line cord to the customer.

6. Check the B+ voltage to see it is at the values specified.

7. Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

T o Exposed Metal

Parts on Set

0.15

1.5 k

Ω

Voltmeter (0.75 V)

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 0.5mA (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 TW-540A. Follo w the manufacturers' instructions to use these instruments.

2. A battery-operated A C 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 v oltmeter. 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 A C range are suitable. (See Fig. A)

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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.

Earth Ground

Fig. A. Using an A C v oltmeter to check A C leakage.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

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TABLE OF CONTENTS

SERVICE NOTE ·························································· 4

1. GENERAL ·································································· 1-1

2. DISASSEMBLY

2-1. SUB BOARD ································································· 2-1 2-2. DVD MECHANISM (DVDM-D50), MAIN BOARD ·· 2-1 2-3. UPPER LID ASSEMBLY ·············································· 2-2 2-4. OCONTROL FLEXIBLE BOARD ······························· 2-2

3. BLOCK DIAGRAMS

3-1. OVERALL BLOCK DIAGRAM ··································· 3-1 3-2. RF SERVO BLOCK DIAGRAM ··································· 3-3 3-3. SCSI INTERFACE BLOCK DIAGRAM ······················ 3-5 3-4. VIDEO/AUDIO BLOCK DIAGRAM ··························· 3-7 3-5. SYSTEM CONTROL BLOCK DIAGRAM·················· 3-9 3-6. POWER BLOCK DIAGRAM ····································· 3-11

4. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

• MAIN PRINTED WIRING BOARD·························· 4-1

• MAIN (RF) SCHEMATIC DIAGRAM ······················ 4-5

• MAIN (DECODER) SCHEMATIC DIAGRAM ········ 4-8

• MAIN (CD DSP) SCHEMATIC DIAGRAM ··········· 4-11

• MAIN (SYSTEM CONTROL)

SCHEMATIC DIAGRAM ········································ 4-15

• MAIN (DVD DSP) SCHEMATIC DIAGRAM ········ 4-19

• MAIN (SCSI) SCHEMATIC DIAGRAM ················· 4-21

• MAIN (MOTOR DRIVER)

SCHEMATIC DIAGRAM ········································ 4-23

• MAIN (AV CONTROL) SCHEMATIC DIAGRAM ········································ 4-26

• MAIN (CONNECTOR) SCHEMATIC DIAGRAM ········································ 4-29

• MAIN (POWER SUPPLY) SCHEMATIC DIAGRAM ········································ 4-31

• REMOTE PRINTED WIRING BOARD ·················· 4-33

• REMOTE SCHEMATIC DIAGRAM ······················· 4-34

• SUB PRINTED WIRING BOARD··························· 4-35

• SUB (MPEG DECODER)

SCHEMATIC DIAGRAM ········································ 4-37

• SUB (VIDEO D/A CONVERTER) SCHEMATIC DIAGRAM ········································ 4-40

• SUB (CONNECTOR) SCHEMATIC DIAGRAM···· 4-43

5. IC PIN FUNCTION DESCRIPTION

5-1. SYSTEM CONTROL MICON

(MAIN BOARD IC801)················································· 5-1

5-2. A/V CONTROL MICON (MAIN BOARD IC901)······· 5-3

6. SELF DIAGNOSIS FUNCTION ·························· 6-1

7. ELECTRICAL ADJUSTMENT

7-1. CHARGE VOLTAGE ADJUSTMENT ························· 7-1 7-2. VIDEO ADJUSTMENT················································· 7-1

8. REPAIR PARTS LIST

8-1. EXPLODED VIEWS 8-1-1.LOWER CABINET SECTION······································ 8-1 8-1-2.UPPER CABINET SECTION ······································· 8-2 8-2. ELECTRICAL P ARTS LIST ········································· 8-3

Service T ool List

Ref.No. Name Part Code Usage

1 Extension cable 1 J-2500-129-1 Extension cable between the MAIN board CN453 and the SUB board CN454 2 Extension cable 2 J-2500-130-1 Extension cable between the MAIN board CN651 and the MD sled motor 3 FFC Extension cable J-2500-131-1 Extension cable between the MAIN board CN652 and the MD spindle motor 4 Serial Extension cable J-2500-132-1 RS-232C cable between the MAIN board CN802 PC (with conversion board) 5 Rewriting froppy disc J-2500-133-1 Rewriting software 6 Test Disc (ROM) 8-797-401-80 The CPC ROM is also used here. 7 Test Disc (ROM) 8-797-402-00 The CPC ROM is also used here.

456, 7

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SER VICE NOTE

Do not unpack or install or repair the optical pickup unit KHS-190A series without the grounding processing as shown below.

1. Grounding the human body

Be sure to wear a grounding wrist strap (10 Ω or less) around your wrist to ground the static electricity accumulated in human body.

2. Grounding the work bend

Place a conductive sheet (10 Ω or less) or a copper plate on the work bench on which the merchandise to be repaired is placed. (The black sheet that is used for packaging the optical pickup unit, is a conductive sheet.) Connect the conductive sheet or the copper plate to an electrical ground.

3. Be careful that your clothes do not touch the optical pickup unit because the static electricity accumulated in your clothes are not grounded through the grounding wrist strap.

4. When the optical pickup unit is shipped from the factory , the laser diode pins are shorted to protect the laser diode from static electricity. To open the shorting, connect the laser diode to an appropriate APC (Automatic laser Power Control) circuit first, then remove the soldering quickly with a soldering iron having the insulation resistance of 1M or more.

Optical pickup unit (KHS-190A/J1N)

Optical pickup unit

DVD mechanism (DVDM-D50)

1 Grounding wrist strap

1MΩ

Flexible board

2 Conductive sheet or copper plate

[Caution] After installing the optical pickup unit, remove soldering.

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