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

– 4 –

Displays the recording time in the form of “rππππππh”.

The displayed time is the total number of hours the laser is high power, which is about one-fourth of the actual
recording time. The time is displayed in decimal digits between 0h to 65535h.

Displays the playback time in the form of “pππππππh”.

The displayed time is the total actual play time. The paused time is not counted. The time is displayed in
decimal digits between 0h to 65535h.

Displays the total number of retries during recording and retry errors during playback in the form of “rππpππ”.

“r” indicates the retries during recording while “p” indicates the retry errors during playback. The number of
retries is displayed in hexadecimal digits between 00 to FF.

Displays the total number of errors in the form of “total ππ”.

The number of errors is displayed in hexadecimal digits between 00 to FF.

Displays the 10 latest errors in the form of “0π E@@”.

The π indicates the history number. The smaller the number, the newer is the error. (00 is the latest error.)

The @@ indicates the error code. Refer to the following table for details. Press the 

[VOLUME+/–]

 button to

switch the  error history.

Mode which erases all the error histories.

The error history serves as a reference for when to replace the optical pick-up. Perform this procedure when the
optical pick-up has been replaced in order to erase past error histories and not at other times. Press the  

p (CD)

button when “er refresh??”  is displayed. The history will be erased and “Complete!” will be displayed momen-
tarily. Be sure to check the following when this mode has been executed.

• Check that the data has been erased.

• Perform recording and playback, and check that the mechanism operates normally.

Display

total rec

total play

retry err

total err

err history

er refresh?

Details of History

No error

Disc error. Cannot read PTOC

(Disc is ejected out)

Disc error. UTOC error

(Disc is not ejected out)

Loading error

Cannot read address (Servo has deviated)

Error Code

E00

E01

E02

E03

E04

E05

E06

E07

E08

E09

E0A

FOK has deviated

Unfocused (Servo has deviated)

Recording retry

Recording retry error

Play retry error

(Access error)

Playback retry error (C2 error)

Details of Error

Error Code

Details of Error

– 5 –

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

3

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

6

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

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

– 6 –

• 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