DOWNLOAD Sony HCD-MD1DX / HCD-MD1EX (serv.man2) Service Manual ↓ Size: 5.69 MB | Pages: 94 in PDF or view online for FREE

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3

..............................................

6

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9

......................................................... 12

...................................................... 19

.............................................................. 20

MD Section ..................................................................... 26
CD Section ...................................................................... 31

7-1. Block Diagram  – CD Section – ..................................... 33
7-2. Block Diagram  – MD Section – .................................... 35
7-3. Block Diagram  – MAIN Section – ................................ 37
7-4. Block Diagram

 – DISPLAY/POWER SUPPLY Section – ..................... 39

7-5

Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 42

7-6. Printed Wiring Board  – BD (CD) Section – .................. 43
7-7. Schematic Diagram – BD (CD) Section – ...................... 45
7-8. Printed Wiring Board  – BD (MD) Section – ................. 47
7-9. Schematic Diagram – BD (MD) Section (1/3) – ............ 49
7-10. Schematic Diagram – BD (MD) Section (2/3) – ............ 51
7-11. Schematic Diagram – BD (MD) Section (3/3) – ............ 53
7-12. Printed Wiring Board  – MAIN Board (side A) – .......... 55
7-13. Printed Wiring Board  – MAIN Board (side B) – .......... 57
7-14. Schematic Diagram  – MAIN Section (1/2) – ................ 59
7-15. Schematic Diagram  – MAIN Section (2/2) – ................ 61
7-16. Printed Wiring Boards  – PANEL Section – .................. 63
7-17. Schematic Diagram – PANEL Section – ........................ 65
7-18. Printed Wiring Boards

– AMP/TRANSFORMER Section – .............................. 67

7-19. Schematic Diagram

– AMP/TRANSFORMER Section – .............................. 69

7-20. Printed Wiring Board  – POWER Section – ................... 71
7-21. Schematic Diagram – POWER Section – ...................... 73
7-22. Printed Wiring Boards  – MOTOR/SW Section – ......... 75
7-23. Schematic Diagram – MOTOR/SW Section – ............... 76
7-24. IC Pin Function Description ........................................... 86

................................................ 96

............................. 103

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• Keep the temperature of the soldering iron around 270 ˚C dur-

ing 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.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type

anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens

instruksjoner.

Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
 rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.

Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.

Udskiftning må kun ske med batteri

af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer’s instructions.

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.

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.

Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing 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.

!

!

Note:
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.

– 7 –

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.

This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

The following caution label is located inside the unit.

After correcting the original service problem, perform the follow-
ing safety check 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.

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.).
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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)

1.5 k

Ω

0.15 

µ

F

AC
voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

– 8 –

1. Remove Side panel (L), (R). (Refer to page 12)
2. Rotate the Worm gear ass’y to direction of the arrow A.

1. Open the CD lid.
2. Turn on S104 and S916 as following figure.
3. Confirm that the laser diode emission while observing the ob-

jecting lens. When there is no emission, Auto Power Control
circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.

CD lid

Worm gear ass’y

A

Insert a precision
screwdriver and
push S916.

S104: ON

Front Panel

PART No.

MODEL

PART No.

AEP and UK models

4-212-516-0

π

Singapore and Hong Kong models

4-212-516-1

π

US and Canadian models

4-212-516-3

π