Sony DHC-MD333 / HCD-MD333 Service Manual ▷ View online
– 5 –
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
other than those specified herein may result in hazardous ra-
diation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperatur e of 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.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER PROD-
UCT MARKING is located on
the rear exterior.
a CLASS 1 LASER product.
The CLASS 1 LASER PROD-
UCT MARKING is located on
the rear exterior.
This caution
label is located
inside the unit.
label is located
inside the unit.
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 PAR 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.
PARTS No.
4-993-849-5π
4-993-849-6π
4-993-849-7π
4-993-849-6π
4-993-849-7π
MODEL
AEP, UK, EE model
MY, SP, JE, HK, AR, AUS model
US, CND model
MY, SP, JE, HK, AR, AUS model
US, CND model
MODEL IDENTIFICATION
— BACK PANEL —
— BACK PANEL —
• Abbreviation
CND : Canadian model
EE
EE
: East European model
HK
: Hong Kong model
SP
: Singapore model
MY
: Malaysia model
AR
: Argentine model
AUS : Australian model
JE
JE
: Tourist model
– 6 –
TABLE OF CONTENTS
1. SERVICING NOTE
.......................................................... 7
2. GENERAL
.......................................................................... 8
3. DISASSEMBLY
3-1. Case .................................................................................... 10
3-2. Front Panel/MD Mechanism Deck Section ........................ 10
3-3. Back Panel, Jack Board ....................................................... 11
3-4. MD Mechanism Deck (MDM-3D) ..................................... 11
3-5. CD Mechanism Deck (CDM13C-5BD19).......................... 12
3-6. BD (MD) Board .................................................................. 12
3-7. Disc Table .......................................................................... 13
3-8. Sub Chassis ......................................................................... 13
3-9. Optical Pick-up (KSS-213B/K-N) ...................................... 14
3-10. Over Write Head ............................................................... 14
3-11. Slider Complete ASSY ...................................................... 15
3-12. Shutter ASSY .................................................................... 16
3-2. Front Panel/MD Mechanism Deck Section ........................ 10
3-3. Back Panel, Jack Board ....................................................... 11
3-4. MD Mechanism Deck (MDM-3D) ..................................... 11
3-5. CD Mechanism Deck (CDM13C-5BD19).......................... 12
3-6. BD (MD) Board .................................................................. 12
3-7. Disc Table .......................................................................... 13
3-8. Sub Chassis ......................................................................... 13
3-9. Optical Pick-up (KSS-213B/K-N) ...................................... 14
3-10. Over Write Head ............................................................... 14
3-11. Slider Complete ASSY ...................................................... 15
3-12. Shutter ASSY .................................................................... 16
4. SERVICE MODE
............................................................. 17
5. TEST MODE
..................................................................... 18
6. ELECTRICAL ADJUSTMENTS
............................... 24
7. DIAGRAMS
7-1. Circuit Boards Location ...................................................... 31
7-2. Block Diagrams
7-2. Block Diagrams
• CD Section ....................................................................... 33
• MD Section ...................................................................... 35
• Main Section .................................................................... 37
• MD Section ...................................................................... 35
• Main Section .................................................................... 37
7-3. Schematic Diagram – CD Section – ................................... 41
7-4. Printed Wiring Board – CD Section – ................................. 43
7-5. Schematic Diagram – MD (1/3) Section – .......................... 45
7-6. Schematic Diagram – MD (2/3) Section – .......................... 47
7-7. Schematic Diagram – MD (3/3) Section – .......................... 49
7-8. Printed Wiring Board – MD Section – ................................ 51
7-9. Schematic Diagram – MD Switch Section – ...................... 53
7-10. Printed Wiring Board – MD Switch Section – ................. 54
7-11. Schematic Diagram – Main (1/3) Section – ..................... 55
7-12. Schematic Diagram – Main (2/3), (3/3) Section – ........... 57
7-13 Printed Wiring Board – Main Section – ........................... 59
7-14. Schematic Diagram – Audio Section – ............................. 61
7-15. Printed Wiring Board – Audio Section – .......................... 63
7-16. Schematic Diagram – Panel Section – ............................. 65
7-17. Printed Wiring Board – Panel Section – ........................... 67
7-18. Schematic Diagram – Jack Section – ............................... 69
7-19. Printed Wiring Board – Jack Section – ............................ 71
7-20. Schematic Diagram – ST Terminal/Loading Section – .... 73
7-21. Printed Wiring Board – ST Terminal/Loading Section – . 74
7-22. Schematic Diagram – Trans Section – ............................. 75
7-23. Printed Wiring Board – Trans Section – ........................... 76
7-24. Schematic Diagram – Power AMP Section – ................... 77
7-25. Printed Wiring Board – Power AMP Section – ................ 79
7-26. IC Block Diagrams ........................................................... 81
7-27. IC Pin Functions ............................................................... 88
7-4. Printed Wiring Board – CD Section – ................................. 43
7-5. Schematic Diagram – MD (1/3) Section – .......................... 45
7-6. Schematic Diagram – MD (2/3) Section – .......................... 47
7-7. Schematic Diagram – MD (3/3) Section – .......................... 49
7-8. Printed Wiring Board – MD Section – ................................ 51
7-9. Schematic Diagram – MD Switch Section – ...................... 53
7-10. Printed Wiring Board – MD Switch Section – ................. 54
7-11. Schematic Diagram – Main (1/3) Section – ..................... 55
7-12. Schematic Diagram – Main (2/3), (3/3) Section – ........... 57
7-13 Printed Wiring Board – Main Section – ........................... 59
7-14. Schematic Diagram – Audio Section – ............................. 61
7-15. Printed Wiring Board – Audio Section – .......................... 63
7-16. Schematic Diagram – Panel Section – ............................. 65
7-17. Printed Wiring Board – Panel Section – ........................... 67
7-18. Schematic Diagram – Jack Section – ............................... 69
7-19. Printed Wiring Board – Jack Section – ............................ 71
7-20. Schematic Diagram – ST Terminal/Loading Section – .... 73
7-21. Printed Wiring Board – ST Terminal/Loading Section – . 74
7-22. Schematic Diagram – Trans Section – ............................. 75
7-23. Printed Wiring Board – Trans Section – ........................... 76
7-24. Schematic Diagram – Power AMP Section – ................... 77
7-25. Printed Wiring Board – Power AMP Section – ................ 79
7-26. IC Block Diagrams ........................................................... 81
7-27. IC Pin Functions ............................................................... 88
8. EXPLODED VIEWS
8-1. Front Panel Section ............................................................. 96
8-2. Chassis Section ................................................................... 97
8-3. MD Mechanism Deck Section-1 (MDM-3J) ...................... 98
8-4. MD Mechanism Deck Section-2 (MDM-3J) ...................... 99
8-5. CD Mechanism Deck Section-1 (CDM13C-5BD19) ....... 100
8-6. CD Mechanism Deck Section-2 (BU-5BD19) ................. 100
8-2. Chassis Section ................................................................... 97
8-3. MD Mechanism Deck Section-1 (MDM-3J) ...................... 98
8-4. MD Mechanism Deck Section-2 (MDM-3J) ...................... 99
8-5. CD Mechanism Deck Section-1 (CDM13C-5BD19) ....... 100
8-6. CD Mechanism Deck Section-2 (BU-5BD19) ................. 100
9. ELECTRICAL PARTS LIST
...................................... 102
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
ing safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
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 microampers). Leak-
age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers). Leak-
age 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.
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 low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15
µ
F
To Exposed Metal
Parts on Set
Parts on Set
1.5k
Ω
AC
voltmeter
(0.75V)
voltmeter
(0.75V)
Earth Ground
– 7 –
SECTION 1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
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.
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 emission, ob-
serve from more than 30 cm away from the objective lens.
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output three times.
that the S curve waveform is output three times.
Note:
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.
DISC TABLE GETTING OUT PROCEDURE ON THE
POWER SUPPLY IS OFF
POWER SUPPLY IS OFF
1. Insert the tweezers to a hole on bottom of the chassis as shown a
figure, then tern fully it toward direction
2.
2. Pull out the disc table.
cam
disc table
1
tweezers
2
3
PRECAUTIONS ON REMOVING WINDOW (FL) FROM
FRONT PANEL
FRONT PANEL
• Use the following procedure to prevent scratches on the front panel.
1
Remove the Knob (VOL).
2
Remove the nut.
3
Remove the
ornament (VOL).
4
Remove the window (FL) using the notch.
– 8 –
Location of Parts and Controls
1
1/u button
2
MD indicator
3
MD disc slot
4
6 (MD) button
5
^ (MD) button and indicator
6
p (MD) button
7
VOLUME knob
8
^ (CD) button and indicator
9
p (CD) button
10
FUNCTION button
11
MD/CD ) +/TUNING + button
12
MD/CD = 0/TUNING – button
13
TUNER/BAND button
14
6 (CD) button
15
r REC button and indicator
16
CD-MD SYNC button
17
CD disc tray
18
CD indicator
19
REPEAT/STEREO/MONO button
20
PLAY MODE/TUNING MODE button
21
PHONES jack
22
Remote sensor
23
Display window
SECTION 2
GENERAL
Front Panel
15
12
13
11
16
17
14
19
20
18
21
7
8
9
10
2
3
4
5
6
1
22
23
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