Sony HCD-LX5, HCD-LX6, HCD-LX30, HCD-LX50 Service manual

HCD-LX5/LX6/LX30/LX50

SERVICE MANUAL

HCD-LX5/LX6/LX30/LX50 are the
Amplifier, CD player, Tape Deck and Tuner
section in LBT-LX5/LX6/LX30/LX50.

Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ; are trade­marks of Dolby Laboratories Licensing Corporation.

Photo: HCD-LX50

CD
Section

TAPE
Section

US Model

HCD-LX30/LX50

Canadian Model

HCD-LX50

AEP Model

UK Model

HCD-LX5

E Model

Australian Model

HCD-LX6

Model Name Using Similar Mechanism HCD-D290/G3300/XB3
CD Mechanism Type CDM37M-5BD32L
Base Unit Name BU-5BD32L
Optical Pick-up Name KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-DR4
Tape Transport Mechanism Type TCM-230PWR1

SPECIFICATIONS

– Continued on next page –

COMPACT Hi-Fi STEREO SYSTEM

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 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 MANU AL OR IN SUPPLEMENTS PUB­LISHED BY SONY.

2

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0
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.

TABLE OF CONTENTS

SECTION 1

SERVICING NOTES

1. SERVICING NOTES............................................... 3

2. GENERAL

Location of Controls ....................................................... 4

Setting the Time .............................................................. 6

3. DISASSEMBLY ......................................................... 7

4. DIAGRAMS

4-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 11

4-2. Printed Wiring Board – BD Board – .............................. 12

4-3. Schematic Diagram – BD Board – ................................ 13

4-4. Printed Wiring Boards – CD MOTOR Section –.......... 14

4-5. Schematic Diagram – CD MOTOR Section – .............. 15

4-6. Printed Wiring Board – AUDIO Board – ...................... 16

4-7. Schematic Diagram – AUDIO Board – ......................... 17

4-8. Printed Wiring Board – LEAF SW Board –.................. 18

4-9. Schematic Diagram – LEAF SW Board –..................... 18

4-10. Printed Wiring Board – MAIN Board – ........................ 19

4-11. Schematic Diagram – MAIN Board (1/3) – .................. 20

4-12. Schematic Diagram – MAIN Board (2/3) – .................. 21

4-13. Schematic Diagram – MAIN Board (3/3) – .................. 22

4-14. Printed Wiring Board – PANEL FL Board –................. 24

4-15. Schematic Diagram – PANEL FL Board –.................... 25

4-16. Printed Wiring Board – PANEL VR Board –................ 26

4-17. Schematic Diagram – PANEL VR Board –................... 27

4-18. Printed Wiring Boards – TC-A/TC-B/CD-L/

CD-L2/CD-R/CD-R2 Boards – ...................................... 28

4-19. Schematic Diagram – TC-A/TC-B/CD-L/

CD-L2/CD-R/CD-R2 Boards – ...................................... 29

4-20. Printed Wiring Boards – FRONT INPUT/

HEADPHONE/MIC Boards – ........................................ 30

4-21. Schematic Diagram – FRONT INPUT/

HEADPHONE/MIC Boards – ........................................ 31

4-22. Printed Wiring Board – PA Board – .............................. 32

4-23. Schematic Diagram – PA Board – ................................. 33

4-24. Printed Wiring Boards – TRANS/SUB TRANS

(LX5/LX30/LX50) Boards – .......................................... 34

4-25. Schematic Diagram – TRANS/SUB TRANS

(LX5/LX30/LX50) Boards – .......................................... 35

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 for AC 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. Follo w 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” indica­tion is 0.75 V, so analog meters must have an accurate low­voltage 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 2 V A C range are suit­able. (See Fig. A)

To Exposed Metal
Parts on Set

AC

1.5 k

0.15 µF

Fig. A. Using an AC voltmeter to check AC leakage.

Ω

Earth Ground

voltmeter
(0.75 V)

5. EXPLODED VIEWS................................................ 38

6. ELECTRICAL PARTS LIST ............................... 46

3

SECTION 2

GENERAL

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.

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK 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.

LOCATION OF CONTROLS
– Front Panel –

2 43

1
wf

wd

ws
wa
w;
ql

qk

qj

5
6

7

8
9

0

qa
qs

qd

qfqgqh

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, observe from more than 30 cm away from the objective lens.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam­aged 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 ra­diation exposure.

– Rear Panel –

2

1

9
8
7
6

5

4 3

4

1 ?/1 (POWER) button
2 DAILY button

REC button
SLEEP button
c/CLOCK SET button

3 Display
4 SYNC EQ button

SYNC BASS button
SURROUND button
MIX GUITAR/KARAOKE button

5 FUNCTION button
6 v/B/V/b button
7 VOLUME control
8 DECK B
9 PHONES jack
0 DECK B operating button

g button G button x button
m button M button X button
z REC button HI SPEED DUB button

CD SYNC button

qa . AMS > control
qs CD operating button

G X button x button m button
M button DISC SKIP button

qd VIDEO 2 INPUT jack
qf PLAY MODE button

REPEAT button

qg Z A EJECT

Z B EJECT

qh DISC1-5 button
qj LOOP button

FLASH button
NON-STOP button
EDIT button

qk DECK A operating button

g button G button x button
m button M button

DIRECTION button
DOLBY NR button

ql MIC MIX jack

GUITAR jack

w; DECK A
wa SUPPER WOOFER MODE button

MIC LEVEL control
GUITAR LEVEL control

ws EJECT button

GROOVE button
SUPER WOOFER button

wd TUNER/BAND button

TUNING +/– button
ENTER/NEXT button
TUNER MEMORY button
STEREO/MONO button
TUNING MODE button
PTY button (LX5 only)

wf POWER SAVE/DEMO (STAND BY) button

DISPLAY button
SPECTRUM ANALYZER button

1 DJ MIX jack
2 ANTENNA terminal
3 REAR SURROUND SPEAKER terminal (LX50 only)
4 FRONT SPEAKER terminal
5 CD DIGITAL OUT terminal
6 VIDEO OUT jack
7 VIDEO 1 jack
8 MD IN/OUT jack
9 PHONO IN jack

5

6

SECTION 3

)

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

CASE

6 case

1 three screws

(CASE3 TP2)

4

5

2 five screws

(BVTT3 × 6)

3 two screws

(BVTP3 × 8)

FRONT PANEL SECTION

1 wire (flat type)

3 three screws

(BVTP3 × 8)

1 wire (flat type)

1 wire (flat type)

(17 core) (CN304)

(13 core) (CN431)

(15 core) (CN303)

5

4

1 three screws

(CASE3 TP2)

2 two connectors

(CN452, 702)

MAIN BOARD (Page 8)
CD MECHANISM DECK
(Page 9)

3 screw

(BVTP3 × 8

4 lug

4 two lugs

2 connector

(CN802)

5 screw (BVTP3 × 8)

6 claw

7 front panel section

5 four screws

(BVTP3 × 8)

7

TAPE MECHANISM DECK (TCM-230PWR1)

2 two screws

(BVTP3 × 8)

1 wire (flat type) (17 core)

(CN1001)

1 wire (flat type) (15 core)

(CN601)

2 two screws

(BVTP3 × 8)

3 tape mechanism deck

(TCM-230PWR1)

MAIN BOARD

7 wire (flat type) (19 core)

(CN411)

6 back panel

2 nine screws

(BVTP3 × 8)

1 wire (flat type) (15 core) (LX5)

wire (flat type) (13 core) (LX6/LX30/LX50)
(CN441)

4

3 jumper plug

(LX5/LX6: Mexican/LX30/LX50)

2 screw (BVTP3 × 8)

(LX5/LX6: Mexican/
LX30/LX50)

2 three screws (BVTP3 × 8)

2 screw (BVTP3 × 8)

(LX50)

2 two screws (BVTP3 × 8)

5 connector (CN903)

qa MAIN board

9 two screws

(BVTP3 × 8)

8 connector

(CN412)

0 two connector

(CN803, 804)

8

CD MECHANISM DECK (CDM37M-5BD32L)

1 wire (flat type) (19 core)

(CN411)

3 three screws

(BVTP3 × 8)

2 connector

(CN412)

4

6

3 three screws

(BVTP3 × 8)

5 Open the two cable clamps.

4

3 two screws

(BVTP3 × 8)

7 five screws

8 CD mechanism deck

(CDM37M-5BD32L)

(BVTP3 × 8)

9

BASE UNIT (BU-5BD32L)

w

e

3 base unit

(BU-5BD32L)

2 boss

1 BU fitting scre

DISC TABLE

Note: When the disc table is installed, adjust the positions of roller cam

and mark B as shown in the figure, then set to the groove of disc
table.

A

1 two screws

(BVTP3 × 8)

3 step screw

2 two brackets (BU)

4 disc tabl

A

10

SECTION 4

d

d

DIAGRAMS

4-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

(In addition to this, the necessary note is printed in each block)

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

f

•

• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)

Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.

• Indication of transisitor.

: internal component.

Q

B

CE

These are omitted.

Q

B

CE

These are omitted.

C

Q

B

E

These are omitted.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in Ω and 1/
specified.

f

•

• 2 : nonflammable resistor.

• 5 : fusible resistor.

• C : panel designation.

• U : B+ Line.

• V : B– Line.

• H : adjustment for repair.

• Voltages are tak en with a V OM (Input impedance 10 MΩ).

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

• Abbreviation

: internal component.

Note:

The components identi­fied by mark 0 or dotted
line with mark 0 are criti­cal for safety.
Replace only with part
number specified.

Voltage variations may be noted due to normal produc­tion tolerances.

Voltage variations may be noted due to normal produc­tion tolerances.

F : TUNER (FM/AM)
E : PLAYBACK (DECK A)
d : PLAYBACK (DECK B)
G : RECORD
J : CD PLAY (ANALOG OUT)
c : CD PLAY (DIGITAL OUT)
N : MIC INPUT

AUS : Australian model
AR : Argentine model
EA : Saudi Arabia model
MY : Malaysia model
MX : Mexican model
SP : Singapore model

4

Note:

Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.

W or less unless otherwise

• Circuit Boards Location

MIC board

TC-A board

CD-L board

TRANS board

PANEL FL board

P ANEL VR board

CD-R board

LEAF SW board

SUB TRANS board
(LX5/LX30/LX50)

TUNER (FM/AM)

MAIN board

PA board

HEADPHONE boar

TC-B board

FRONT INPUT board

TABLE SENSOR board

CD MOTOR board

BD boar

AUDIO board

LED board

1111

HCD-LX5/LX6/LX30/LX50

4-2. PRINTED WIRING BOARD – BD Board – • See page 11 for Circuit Boards Location.

)(

TP(GND)

TP(VC)

TP(RF)

TP

(AGCCON)

TP(FE)

TP(TE)

TP(FE1)

21

31

31,,

21

05

05

)(

)(

(Page 19)

19

21

21

31

31,,

• Semiconductor
Location
(Side A)

Ref. No. Location

Q101 C-3

KSS-213D/Q-NP

• Semiconductor
Location
(Side B)

Ref. No. Location

IC101 C-2
IC102 B-1
IC103 B-1

1212

4-3. SCHEMATIC DIAGRAM – BD Board – • See page 23 for Waveforms. • See page 36 for IC Block Diagrams.

HCD-LX5/LX6/LX30/LX50

(Page 21)

• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
( ) : CD PLAY

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.

1313

HCD-LX5/LX6/LX30/LX50

4-4. PRINTED WIRING BOARDS – CD MOTOR Section – • See page 11 for Circuit Boards Location.

TABLE SENSOR BOARD

TO

D

C

TO

CD MOTOR BOARD

C

LED BOARD

B

(Page 19)TO

D

TO

CD MOTOR BOARD

1414

4-5. SCHEMATIC DIAGRAM – CD MOTOR Section – • See page 36 for IC Block Diagrams.

HCD-LX5/LX6/LX30/LX50

B

(Page 21)

• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD STOP

1515

HCD-LX5/LX6/LX30/LX50

4-6. PRINTED WIRING BOARD – AUDIO Board – • See page 11 for Circuit Boards Location.

(

)

05

E

(Page 19)

1616

4-7. SCHEMATIC DIAGRAM – AUDIO Board – • See page 36 for IC Block Diagrams.

HCD-LX5/LX6/LX30/LX50

(PLAYBACK)

PB EQ AMP

(DECK A)

PB EQ AMP

(DECK B)

SWITCHING

PB LEVEL (L)

(DECK A)

PB LEVEL (R)

(DECK A)

PB LEVEL (L)

(DECK B)

PB LEVEL (R)

(DECK B)

NC
A +7.5V
APB–LCH
APB–RCH
AGND
BPB–LCH
BPB–RCH
A –7.5V

–VBIAS (–7.5V)
+VBIAS (+7.5V)
B–REC–RCH
B–REC–LCH
TC–HEAD–GND

E

(Page21)

REC BIAS (R)

(DECK B)

BIAS OSC

REC BIAS (L)

(DECK B)

-6.8

REC BIAS

• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAY
( ) : RECORD

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.

1717

HCD-LX5/LX6/LX30/LX50

4-8. PRINTED WIRING BOARD – LEAF SW Board – • See page 11 for Circuit Boards Location.

DECK A

PLUNGER

4

3

1

2

(DECK A PLAY)

05

(DECK A HALF)

(DECK A 120/70)

(

4-9. SCHEMATIC DIAGRAM – LEAF SW Board –

)

(DECK A REC)

CONTROL SWITCH

F

(Page 19)

(DECK B PLAY)

4

1

(DECK B HALF)

DECK B

PLUNGER

3

2

(DECK B 120/70)

(DECK B REC)

12
12

(CAPSTAN)

DECK B

PLUNGER

DECK A

PLUNGER

(DECK A 120/70)

(DECK A HALF)

(DECK A REC)

(DECK B HALF)

(DECK B REC)

(DECK B 120/70)

ROTATION DETECT SENSOR

(DECK A)

ROTATION DETECT
SENSOR (DECK B)

CAPM–
CAPM+
CAPM–H/L
A–TRGM
TRGM–GND
B–TRGM

A–SHUT
DGND
A–HALF
+5V
A–120/70
B–SHUT
A PLAY
B–HALF / REC–A / REC–B
B–120/70
B PALY
NC

F

(Page 21)

(DECK A PLAY)

(DECK B PLAY)

• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAY
( ) : RECORD

: Impossible to measure

∗

1818

4-10. PRINTED WIRING BOARD – MAIN Board – • See page 11 for Circuit Boards Location.

(Page 30)

HCD-LX5/LX6/LX30/LX50

• Semiconductor
Location

Ref. No. Location

D191 B-7
D192 B-7
D193 A-6
D194 B-6
D333 I-3
D334 I-3
D335 I-4
D336 I-4
D501 I-6
D534 G-7
D801 I-6
D802 H-7
D803 H-8
D804 I-7
D805 H-8
D806 H-7
D807 H-8
D808 I-6
D911 E-10
D912 F-9
D913 F-10
D931 G-10
D951 B-10

IC101 D-3
IC181 B-5
IC191 B-7
IC301 G-2
IC501 H-6
IC601 B-1
IC781 A-12
IC801 I-7
IC901 C-11
IC911 E-10
IC931 G-10
IC932 G-11
IC932 G-12
IC933 H-11
IC951 B-11

(Page 26)

(Page 16)

(Page 18)

(Page 24)

Q111 D-5
Q112 D-5
Q113 D-5
Q115 D-4
Q161 E-5

(Page 32)

(Page 32)

(Page 14)(Page 12)

Q162 E-5
Q163 E-5
Q165 E-3
Q331 I-2
Q332 I-2
Q333 I-2
Q334 I-2
Q335 I-4
Q336 I-3
Q337 I-3
Q338 I-4
Q339 I-4
Q340 I-3
Q341 I-3
Q342 I-3
Q343 I-3
Q801 H-7
Q802 H-9
Q803 H-8
Q804 I-8
Q901 C-11
Q902 B-11
Q903 B-11
Q904 B-11
Q905 B-11
Q906 B-11
Q911 F-9
Q912 F-9
Q913 F-9
Q914 F-9
Q931 G-10
Q932 G-9
Q961 A-10
Q962 A-10

1919