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

– 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

– 9 –

!∞

1

CD lid

2

6 (CD) button

3

Display window

4

Remote sensor

5

MD 

^ button and indicator

6

MD 

p button

7

VOLUME +/– buttons

8

6 (MD) button

9

CD 

p button

0

CD 

^ button and indicator

!¡

1/u button

!™

FUNCTION button

!£

TUNER/BAND button

!¢

PHONES jack

!∞

=0 button

!§

)+ button

!¶

MD disc slot

!•

CD-MD SYNC button

!ª

REC button and indicator

1

TAPE OUT jacks

2

TAPE IN jacks

3

SPEAKER terminals

4

VOLTAGE SELECTOR switch

(Singapore and Hong Kong models)

5

FM ANTENNA terminal

6

AM ANTENNA terminals

!¢

!£

!• !ª

!¶

!§

!™

!¡

!º

9

8

7

6

5

4

3

1

(Upper panel)

2

(Upper panel)

1

2

5

6

3

4

– 10 –

1

FUNCTION button

2

SLEEP button

3

CD, OPEN/CLOSE button

4

1/u button

5

MODE, PLAY/TUNING button

6

REPEAT, STEREO/MONO button

7

VOL +/– buttons

8

DBFB button

9

BAND, TUNER button

0

–, PRESET button

!¡

+, PRESET button

!™

MD 

( button

!£

MD 

P button

!¢

MD 

p button

!∞

MD 

= button

!§

MD 

+ button

!¶

MD SCROLL button

!•

CD 

( button

!ª

CD 

P button

@º

CD 

p button

@¡

CD 

= button

@™

CD 

+ button

@£

DISPLAY, CHARACTER button

@¢

EDIT button

@∞

– button

@§

+ button

@¶

SELECT, CLOCK/TIMER button

@•

N, CURSOR button

@ª

n, CURSOR button

#º

SET, CLOCK/TIMER button

#¡

YES, ENTER button

#™

NO, CANCEL button

#£

MUSIC MENU button

1 2 3 4

#º #¡ #™ #£

8

6

5

7

9 !º !¡

!™ !£ !¢

!∞ !§ !¶

!• !ª @º

@¶ @• @ª

@¢ @∞ @§

@¡ @™ @£