Sony AVD-S50 User manual

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Model Name Using Similar Mechanism NEW
Mechanism Type CDM66D-DVBU15
Base Unit Name DVBU15
Optical Pick-up Name TDP022W
SERVICE MANUAL
US Model
Canadian Model
AVD-S50ES
AEP Model
UK Model
AVD-S50
AVD-S50/S50ES
SUPER AUDIO CD/DVD RECEIVER
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (AVD-S50ES)
POWER OUTPUTAND TOTAL HARMONIC DISTORTION:
With 6 ohm loads, both channels driven, from 20 – 20,000 Hz; rated
100 watts per channel minimum RMS power, with no more than 0.7 %
total harmonic distortion from 250 milliwatts to rated output.
Amplifier section
Stereo mode 100 W + 100 W (6 ohms, 20 – 20,000 Hz, THD 0.7 %)
Surround mode Front: 100 W + 100 W
Center*: 100 W
Rear*: 100 W + 100 W (6 ohms, 20 – 20,000 Hz, THD 0.7 %)
* Depending on the sound field settings and the source, there may be no sound output.
Inputs (Analog) ANALOG IN:
Sensitivity: 150 mV
Impedance: 50 kilohms
Inputs (Digital) DIGITAL IN OPTICAL:
Sensitibity: —
DIGITAL IN COAXIAL:
Sensitibity: 0.5 V
Impedance: 75 ohms
Outputs (Analog) ANALOG OUT:
Voltage: 2 V
Impedance: 1 kilohms
SUBWOOFER ANALOG OUT:
Voltage: 3 V
Impedance: 47 kilohms
PHONES:
Accepts low- and high-impedance headphones
Outputs (Digital) DIGITAL OUT OPTICAL
Sensitibity: — – Continued on next page –
Ver 1.4 2004. 09
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
9-874-154-05
2004I04-1
© 2004. 09

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Super Audio CD/DVD system
Laser Semiconductor laser
(Super Audio CD/DVD: λ= 650 nm)
(CD: λ= 780 nm)
Emission duration: continuous
Signal format system AVD-S50: PAL
AVD-S50ES: NTSC
Frequency response (at 2 CH STEREO mode)
DVD (PCM): 2 Hz to 22 kHz (±1.0 dB)
CD: 2 Hz to 20 kHz (±1.0 dB)
Signal-to-noise ratio More than 80 dB (VIDEO 1 (AUDIO) connectors only)
Harmonic distortion Less than 0.03 %
FM tuner section
System PLL quartz-locked digital synthesizer system
Tuning range 87.5 – 108.0 MHz (100 kHz step)
Antenna FM wire antenna
Antenna terminals 75 ohms, unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
System PLL quartz-locked digital synthesizer system
Tuning range AVD-S50ES:
530 – 1,710 kHz (with the interval set at 10 kHz)
531 – 1,710 kHz (with the interval set at 9 kHz)
AVD-S50:
531 – 1,710 kHz (with the interval set at 9 kHz)
Antenna Loop antenna
Intermediate frequency 450 kHz
Video section (AVD-S50ES)
Inputs S-video:
Y: 1 Vp-p 75 ohms
C: 0.286 Vp-p 75 ohms
Outputs S-video:
Y: 1 Vp-p 75 ohms
C: 0.286 Vp-p 75 ohms
Video section (EURO AV) (AVD-S50)
Input Video: 1 Vp-p 75 ohms
Output Video: 1 Vp-p 75 ohms
General
Power requirements AVD-S50ES: 120VAC, 60 Hz
AVD-S50: 230 V AC, 50/60 Hz
Power consumption 180 W
1.5 W
(at the Power Saving Mode)
Dimensions (approx.) 430 ×98 ×453 mm (17 ×3 7/8 ×17 7/8 inches) (w/h/d)
incl. projecting parts
Mass (approx.) 7.5 kg (16 lb. 9 oz.)
Operating temperature 5 °C to 35 °C (41 °F to 95 °F)
Operating humidity 5 % to 90 %
Design and specifications are subject to change without notice.
AVD-S50/S50ES
SELF DIAGNOSIS FUNCTION

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SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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.
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts forAC 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 aVOM
or battery-operatedAC voltmeter. The “limit” indication is 0.75
V, 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 AC range are suitable. (See Fig. A)
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR 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.
AVD-S50/S50ES
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270˚C during
repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
1.5 k Ω 0.15 µ FAC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
US, Canadian model
AEP, UK model

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TABLE OF CONTENTS
SELF DIAGNOSIS FUNCTION ........................................ 2
1. SERVICING NOTES ........................................................ 5
2. GENERAL
Location of Controls................................................................ 6
3. DISASSEMBLY ............................................................... 10
3-1. Case ................................................................................... 10
3-2. Loading Panel Assy ........................................................... 11
3-3. Front Panel Assy ............................................................... 11
3-4. Back PanelAssy, Power Sw Board ................................... 12
3-5. DigitalAmp Board, Power Board, DVD Board ................ 12
3-6. Mechanism Deck............................................................... 13
3-7. Pick-up Unit ...................................................................... 13
3-8. Belt (LD), Loading Board, Motor (L) Assy ...................... 14
4. TEST MODE ..................................................................... 15
5. DIAGRAMS
5-1. IC Pin Function Description ............................................. 22
5-2. Circuit Boards Location .................................................... 40
5-3. Note for Printed Wiring Boards and
Schematic Diagrams .......................................................... 40
5-4. Printed Wiring Board –RF Section– ................................. 42
5-5. Schematic Diagram –RF Section– .................................... 43
5-6. Printed Wiring Board –DVD Section–.............................. 44
5-7. Schematic Diagram –DVD Section (1/10)– ...................... 46
5-8. Schematic Diagram –DVD Section (2/10)– ...................... 47
5-9. Schematic Diagram –DVD Section (3/10)– ...................... 48
5-10. Schematic Diagram –DVD Section (4/10)– ...................... 49
5-11. Schematic Diagram –DVD Section (5/10)– ...................... 50
5-12. Schematic Diagram –DVD Section (6/10)– ...................... 51
5-13. Schematic Diagram –DVD Section (7/10)– ...................... 52
5-14. Schematic Diagram –DVD Section (8/10)– ...................... 53
5-15. Schematic Diagram –DVD Section (9/10)– ...................... 54
5-16. Schematic Diagram –DVD Section (10/10)–.................... 55
5-17. Printed Wiring Board –DigitalAmp Section– .................. 56
5-18. Schematic Diagram –Digital Amp Section (1/2)– ............ 58
5-19. Schematic Diagram –Digital Amp Section (2/2)– ............ 59
5-20. Printed Wiring Board –Video Section– ............................. 60
5-21. Schematic Diagram –Video Section–................................ 61
5-22. Printed Wiring Board –RGB Section– .............................. 62
5-23. Schematic Diagram –RGB Section– ................................. 63
5-24. Printed Wiring Boards –In/Out Section– ..........................64
5-25. Schematic Diagram –In/Out Section–............................... 65
5-26. Printed Wiring Boards –Display Section– ........................ 66
5-27. Schematic Diagram –Display Section–............................. 67
5-28. Printed Wiring Board –Speaker Section– ......................... 68
5-29. Schematic Diagram –Speaker Section– ............................ 69
5-30. Printed Wiring Boards –Power Section–........................... 70
5-31. Schematic Diagram –Power Section– ............................... 71
5-32. IC Block Diagrams............................................................ 72
6. EXPLODED VIEWS
6-1. Case Section ...................................................................... 81
6-2. Front Panel Section ........................................................... 82
6-3. Chassis Section ................................................................. 83
6-4. Back Panel Section............................................................ 84
6-5. CD Mechanism Deck Section ........................................... 85
6-6. Base Unit Section .............................................................. 86
7. ELECTRICAL PARTS LIST ........................................ 87
AVD-S50/S50ES

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AVD-S50/S50ES
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
Ver 1.4
DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure:
1. Press two buttons of [FUNCTION ] and [ PREV]
simultaneously.
2. The message “UNLOCKED” is displayed and the tray is
unlocked.
Note:When “LOCKED” is displayed, the tray lock is not released
by turning power on/off with the [POWER] button.
.
–
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “DVD section adjustment” and
check that the S curve waveforms is output three times.
NOTE OF REPLACING THE DVD BOARD
When replacing the DVD board, since the adjustment value is not
set up correctly, “Drive Auto Adjustment” can’t be performed.
In this case, initialize Memory in the following procedures.
Procedure:
1. Set the test mode. (See page 15)
2. Press the [2] key of the remote commander, and set the “DRIVE
MANUAL OPERATION”. (See page 17)
3. Press the [6] key of the remote commander, and set the “2-6,
Memory Check”. (See page 19)
4. Press the [CLEAR] key of the remote commander, and initialize
Memory.

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AVD-S50/S50ES SECTION 2
GENERAL This section is extracted
from instruction manual.
LOCATION OF CONTROLS

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AVD-S50/S50ES
AVD-S50:
AVD-S50ES:

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AVD-S50/S50ES

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AVD-S50/S50ES

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AVD-S50/S50ES
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE
SECTION 3
DISASSEMBLY
Note: This set can be disassemble according to the following sequence.
3-1. CASE
(Page 10)
3-2. LOADING PANEL ASSY
(Page 11)
SET
3-4. BACK PANEL ASSY,
POWER SW BOARD
(Page 12)
3-5. DIGITAL AMP BOARD,
POWER BOARD,
DVD BOARD
(Page 12)
3-3. FRONT PANEL ASSY
(Page 11)
3-6. MECHANISM DECK
(Page 13)
3-7. PICK-UP UNIT
(Page 13) 3-8. BELT (LD), LOADING BOARD,
MOTOR (L) ASSY
(Page 14)
1 two screws
(flat head screw
)
2 two screws
(flat head screw)
3 three screws
(flat head screw
)
4 case