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 B+ voltage to see it is at the values specified.
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.
To Exposed Metal
Parts on Set
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 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 voltmeter. The “limit” indica-
tion is 0.75V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63T rd are e x-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2V A C range ar e suit-
able. (See Fig. A)
AC
0.15 µF
1.5 k
Ω
Earth Ground
Voltmeter
(0.75 V)
Fig. A Using AC voltmeter to check AC leakage
WARNING!!
WHEN SERVICING, DO NO T APPR O A CH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMISSION,
BE SURE TO OBSERVE FROM A DISTANCE OF
MORE THAN 25 cm FROM THE SURFACE OF THE
OBJECTIVE LENS ON THE OPTICAL PICK-UP BLOCK.
CAUTION:
The use of optical instrument with this product will increase eye
hazard.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR 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.
– 2 –
TABLE OF CONTENTS
Section Title Page Section Title Page
Service Note ............................................................................ 4
5. IC PIN FUNCTION DESCRIPTION
1. GENERAL
This Player Can Play the Following Discs .................... 1-1
Getting Started .............................................................. 1-1
Basic Operations ........................................................... 1-2
Playing Discs in Various Modes .................................... 1-4
Setting and Adjustments ............................................... 1-8
Dolby Digital Surround .................................................. 1-9
Additional Information ................................................... 1-10
2. DISASSEMBLY
2-1. Case Removal ............................................................... 2-1
2-2. Front Panel Section Removal ....................................... 2-1
2-3. MB-78 Board Removal .................................................. 2-1
2-4. AU-197 Board Removal ................................................ 2-1
2-5. MD Block Ass’y Removal .............................................. 2-2
2-6. TK-47 Board Removal................................................... 2-2
2-7. Tray Removal ................................................................. 2-2
2-8. Skew Motor (M902) Removal........................................ 2-2
2-9. Sled Motor (M501) Removal ......................................... 2-3
2-10. Spindle Motor (M901) Removal .................................... 2-3
2-11. Optical Pick-up Removal ............................................... 2-3
2-12. Internal Views ................................................................ 2-4
2-13. Circuit Boards ................................................................ 2-5
3. BLOCK DIAGRAMS
3-1. Block Diagram 1 (RF, Servo, Power)............................. 3-1
3-2. Block Diagram 2 (Signal Process) ................................ 3-6
4. PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS
4-1. Frame Schematic Diagram............................................ 4-1
4-2. Printed Wiring Boards and Schematic Diagrams ......... 4-5
TK-47 Printed Wiring Board .......................................... 4-5
TK-47 Schematic Diagram ............................................ 4-7
MB-78 Printed Wiring Board ......................................... 4-12
MB-78 (AV Decoder) Schematic Diagram .................... 4-17
MB-78 (Video Encoder) Schematic Diagram................ 4-21
MB-78 (Drive), FG-43 Schematic Diagrams................. 4-25
MB-78 (DSP) Schematic Diagram ................................ 4-30
MB-78 (BIAS) Schematic Diagram ............................... 4-33
MB-78 (IF µ-com) Schematic Diagram ......................... 4-37
MB-78 (ARP, L Gate Array, Decrypt)
Schematic Diagram ....................................................... 4-41
MB-78 (System µ-com, S Gate Array)
Schematic Diagram....................................................... 4-45
MB-78 (AC3 Decoder) Schematic Diagram.................. 4-49
AU-197 Printed Wiring Board........................................ 4-53
AU-197 Schematic Diagram ......................................... 4-57
FL-88, FR-133, LE-19 Printed Wiring Boards .............. 4-61
FL-88, FR-133, LE-19 Schematic Diagrams ................ 4-65
YS-14, HP-96 Printed Wiring Boards and
Schematic Diagrams ..................................................... 4-69
POWER BLOCK (HS-930SF) Printed Wiring Board
and Schematic Diagram................................................ 4-73
POWER BLOCK (HS-930SU) Printed Wiring Board
and Schematic Diagram................................................ 4-76
5-1. Interface Control Pin Function (MB-78 Board IC604) .. 5-1
5-2 System Control Pin Function (MB-78 Board IC805) .... 5-2
6. TEST MODE
6-1. Starting up Test Mode ................................................... 6-1
6-2. Selection of Check Item ................................................ 6-1
6-3. Error Display.................................................................. 6-2
6-4. General Description of Checking Method..................... 6-2
6-5. Drive Auto Adjustment................................................... 6-10
6-6. Drive Manual Operation ................................................ 6-14
6-6-1. Drive Manual Operation menu screen..................... 6-14
6-6-2. Disc Type .................................................................. 6-14
6-6-3. Manual Control 1...................................................... 6-14
6-6-4. Manual Control 2...................................................... 6-15
6-6-5. Manual Control 3...................................................... 6-15
6-6-6. Manual Adjust 1........................................................ 6-15
6-6-7. Manual Adjust 2........................................................ 6-16
6-6-8. Auto Adjust ............................................................... 6-16
6-6-9. Check ....................................................................... 6-16
6-6-10. EEPROM Data screen Display ................................ 6-17
6-7. Other Operation............................................................. 6-18
7. ELECTRICAL ADJUSTMENT
7-1. Power Supply Check ..................................................... 7-1
1. HS-930SF/930SU Board............................................... 7-1
7-2. Adjustment of System Control ...................................... 7-2
1. 27 MHz Free Run .......................................................... 7-2
7-3. Adjustment of Video System
1. Video Level Adjustment ................................................ 7-2
2. S-Terminal Output Check .............................................. 7-2
3. Checking Composite Video Output B-Y ........................ 7-2
4. Checking Composite Video Output R-Y ....................... 7-3
5. Checking Composite Video Output Y............................ 7-3
6. Checking S Video Output S-C....................................... 7-3
7. Checking S Video Output DC Level .............................. 7-3
7-4. Adjustment Related Parts Arrangement ....................... 7-4
8. REPAIR PARTS LIST
8-1. Exploded Views ............................................................. 8-1
8-1-1. Case Assembly (S500D).......................................... 8-1
8-1-2. Front Panel Assembly (S500D) ............................... 8-2
8-1-3. Case Assembly (S505D).......................................... 8-3
8-1-4. Front Panel Assembly (S505D) ............................... 8-4
8-1-5. Chassis Assembly .................................................... 8-5
8-1-6. DVD Mechanism Chassis Assembly (1).................. 8-6
8-1-7. DVD Mechanism Chassis Assembly (2).................. 8-7
8-2. Electrical Parts List........................................................ 8-8
– 3 –
2. NOTE ON REMOVE THE CASE
1) Remove six tapping screws. (See Fig. 1)
2) Open the side of case. (See Fig. 1)
3) Remove the case as lift straight. (See Fig. 1)
Two tapping screws
Two tapping screws
Two tapping screws
Fig. 1
4. HOW TO SERVICE MB-78 BOARD
1) Remove the case from the set. (Refer to 2-1)
2) Remove the cover (upper). (Refer to 2-3)
3) Set the MB-78 board as shown in Fig. 3.
Note: Do not disconnect wiring.
Case
3. DISK REMOVAL PROCEDURE
(at POWER OFF)
1) Insert a cross-tip screwdriver into a hole at the bottom, and
rotate the cam gear 1 in direction A. (See Fig. 2)
Note: To pr event a damege of cam gear, rotate it in direction
A by 1/4 turn.
2) Draw out the tray 2 in direction B by hand, and remove a
disk. (See Fig. 2)
1 Cam gear
B
2 Tray
Hole
Fig. 3
A
Fig. 2
– 5 –
7-2. Cleaning Spindle Motor Turntable
1) Remove the tray. (Refer to 2-7)
2) Clean the spindle motor turntable if disc antiskid rubber (black)
is dirty. (See Fig. 9)
7-4. Deformation of Insulator
1) Assemble the spindle base into the base unit.
2) Lock with 4 shoulder screws. (See Fig. 11)
3) Check if 4 insulators deformed. (See Fig. 11)
Spindle motor
Turntable
Fig. 9
7-3. Aligning Phase of Cam Gear and
Drive Gear
1) Align triangle marks when assembling the cam gear and drive
gear. (See Fig. 10)
Four step screws
Two insulators
Insulator
Two insulators
Good NG
Fig. 11
7-5. Note on Mounting FG-43 Board
1) Align two bosses. (See Fig. 12)
2) Fix the board securely with screws (PTPWH2 × 5). (The sen-
sor will not function normally if the board floats up.)
Drive gear Cam gear
Align triangle marks.
Screw
(PTPWH2 × 5)
FG-43 board
Two bosses
Fig. 10
Fig. 12
– 9 –