Sony HCDM-70 Service manual

Tape player section

Recording system 4-track 2-channel stereo
Frequency response 50 - 13,000 Hz (±3 dB),

using a Sony TYPE I
cassette

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range
North American model: 87.5 - 108.0 MHz

(100-kHz step)

Other models: 87.5 - 108.0 MHz

(50-kHz step)
Antenna FM wire antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz

AM tuner section

Tuning range
Pan-American model: 530 - 1,710 kHz

(with the tuning interval

set at 10 kHz)

531 - 1,710 kHz

(with the tuning interval

set at 9 kHz)
European model: 531 - 1,602 kHz

(with the tuning interval

set at 9 kHz)

Amplifier section
For the U.S. model
AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:

With 6-ohm loads, both channels driven, from
70 - 20,000 Hz; rated 18 watts per channel
minimum RMS power, with no more than 0.9%
total harmonic distortion from 250 milliwatts to
rated output.

North American model:

Continuous RMS power output (reference):

20 + 20 W
(6 ohms at 1 kHz, 10%

THD)
Total harmonic distortion less than 0.07% (6 ohms at
1 kHz, 12 W)

European model:

DIN power output (rated): 15 + 15 W

(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):

20 + 20 W

(6 ohms at 1 kHz, 10%

THD)
Music power output (reference):

40 + 40 W

DIN power output (rated): 15 + 15 W

(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

18 + 18 W
(6 ohms at 1 kHz, 10%

THD)
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 12 + 12 W

(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):

15 + 15 W

(6 ohms at 1 kHz, 10%

THD)
Inputs

AUDIO IN MD (VIDEO) (phono jacks):

Sensitivity 500/250 mV,

impedance 47 kilohms
Outputs

OPTICAL DIGITAL OUT (CD):

Optical
PHONES: Accepts headphones with

an impedance of 8 ohms

or more
SPEAKER: 6 ohms

Other models:

The following measured at 230 V AC, 60 Hz

CD player section

System Compact disc and digital

audio system
Laser Semiconductor laser

(λ = 780 nm)

Emission

duration: continuous
Wavelength 780 - 790 nm
Frequency response 2 Hz - 20 kHz (±0.5 dB)

HCD-M70

SERVICE MANUAL

Ver. 1.3 2005.03

HCD-M70 is the Amplifier, CD player, Tape
Deck and Tuner section in CMT-M70/M70K.

CD
Section

TAPE
Section

US Model

Canadian Model

AEP Model

UK Model

E Model

Austr alian Model

Model Name Using Similar Mechanism HCD-CP100
CD Mechanism Type CDM55F-K6BD41A
Optical Pick-up Name KSS-213DCP

Model Name Using Similar Mechanism NEW

9-873-633-04 Sony Corporation

2005C05-1 Personal Audio Group
© 2005.03 Published by Sony Engineering Corporation

SPECIFICATIONS

MICRO Hi-Fi COMPONENT SYSTEM

– Continued on next page –

HCD-M70

r

Other models: 530 - 1,710 kHz

Antenna AM loop antenna, external
Intermediate frequency 450 kHz

General

Power requirements
North American model: 120 V AC, 60 Hz
European model: 230 V AC, 50/60 Hz
Mexican model: 120 V AC, 60 Hz
Australian model: 230 V AC, 50/60 Hz
Thailand model: 220 V AC, 50/60 Hz
Other models: 110 - 120 V or 220 -

Power consumption
European model: See the nameplate

Other models: See the nameplate
Dimensions (w/h/d) Approx. 159 × 217 ×

Mass Approx. 4.5 kg
Design and specifications are subject to change

without notice.

(with the tuning interval
set at 10 kHz)
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)

antenna terminal

240 V AC, 50/60 Hz
Adjustable with voltage
selector

0.5 W (in the standby
mode)

315 mm incl. projecting
parts and controls

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 leaka ge 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 A C milliammeter. The Data Precision 245
digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a V OM
or battery-operated A C 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 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

0.15 µF

1.5 k

Ω

voltmete
(0.75 V)

Earth Ground

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

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 MANUAL 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.

HCD-M70

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra­diation 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.

CAUTION :

INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.

ADVARSEL :

SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE
FOR STRÅLING.

VORSICHT :

ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.

VARO! :

TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

VARNING :

OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.

ADVERSEL :

SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.

VIGYAZAT! :

GÁRVESZÉLY! KERÜLJE A BESUGÁRZÁST!

INVISIBLE LASER RADIATION WHEN OPEN AND

USYNLIG LASERSTRÅLING VED ÅBNING NÅR

UNSICHTBARE LASERSTRAHLUNG, WENN

AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-

OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD

USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG

A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU-

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.

TABLE OF CONTENTS

1. SERVICING NOTES............................................... 4

2. GENERAL ................................................................... 5

3. DISASSEMBLY

3-1. Disassembl y Flow ........................................................... 6

3-2. Panel (Side) (L), Panel (Side) (R) .................................. 7

3-3. Top Panel Section............................................................ 7

3-4. Mechanical Deck (Tape) ................................................. 8

3-5. F ront Panel Section ......................................................... 8

3-6. Back Panel Assy .............................................................. 9

3-7. MAIN Board ................................................................... 9

3-8. CD Mechanism Deck (CDM55F-K6BD41A) ................ 10

3-9. Base Unit (BU-K6BD41A) ............................................. 11

3-10. Loading Board................................................................. 11

3-11. Cam (CDM55) ................................................................ 12

4. TEST MODE.............................................................. 13

5. ELECTRICAL ADJUSTMENTS

Deck Section ................................................................... 13

CD Section ...................................................................... 13

6. DIAGRAMS

6-1. Block Diagram – CD SERVO Section – ....................... 14

6-2. Block Diagram – TUNER/TAPE DECK Section – ...... 15

6-3. Block Diagram – MAIN Section – ................................ 16

6-4. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 17

6-5. Printed Wiring Board – CD Board – ............................. 18

6-6. Schematic Diagram – CD Board – ................................ 19

6-7. Printed Wiring Board – TC Board –.............................. 20

6-8. Schematic Diagr am – TC Board –................................. 21

6-9. Schematic Diagram – MAIN Board (1/2) – .................. 22

6-10. Schematic Diagram – MAIN (2/2)/JACK Boards –...... 23

6-11. Printed Wiring Boards – MAIN/JACK Boards – .......... 24

6-12. Printed Wiring Boards

– CONTROL/LOADING/VIDEO Boards – .................. 26

6-13. Schematic Diagram – CONTROL/LOADING/

SWITCH (1/2)/VIDEO Boards – ................................... 27

6-14. Printed Wiring Board – SWITCH Board – ................... 28

6-15. Schematic Diagram – SWITCH Board (2/2) – ............. 29

6-16. Printed Wiring Board – POWER Board – ..................... 30

6-17. Schematic Diagram – POWER Board –........................ 31

6-18. IC Pin Function Description ........................................... 34

7. EXPLODED VIEWS

7-1. Panel (Side) Section ........................................................ 36

7-2. F ront Panel Section ......................................................... 37

7-3. Top Panel Section............................................................ 38

7-4. Chassis Section-1 ............................................................ 39

7-5. Chassis Section-2 ............................................................ 40

7-6. CD Mechanism Deck (CDM55F-K6BD41A) ................ 41

7-7. Base Unit (BU-K6BD41A) ............................................. 42

8. ELECTRICAL PARTS LIST ............................... 43

3

HCD-M70

TC board (CN301)

main board (CN301)

Connect jig (extension cable J-2501-167-A)
to the main board (CN301) and TC board (CN301).

SECTION 1

SERVICING NOTES

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.

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 objectiv e lens.

MODEL IDENTIFICATION
– Rear Panel –

Part No.

SERVICE POSITION

In checking the CD block, prepare jig (extension cable J-2501­011-B: 1.25 mm Pitch, 19 cores, Length 300 mm).

Connect jig (extension cable J-2501-011-B)
to the control board (CN805) and CD board (CN101).

control board (CN805)

Any box to put.

Model Name Part No.

AEP and UK models 4-238-716-0
US and Canadian models 4-238-888-0
Singapore model 4-238-889-0
Mexican model 4-239-812-0
Australian model 4-240-890-0
Korean model 4-240-891-0
Thai model 4-240-892-0

CD board (CN101)

[]

[]

[]

[]

[]

[]

[]

In checking the tape deck section, prepare jig (extension cable J­2501-167-A: 1.25 mm Pitch, 17 cores, Length 300 mm).

4

List of Button Locations and Reference Pages

How to use this page

Use this page to find the location of buttons and other
parts of the system that are mentioned in the text.

Main unit

ALPHABETICAL ORDER

A – F

CD disc tray 9 (8)
CD SYNCHRO qa (13, 14)
CD SYNCHRO indicator w; (14)
CD N 7 (8, 9)
CD X 7 (8)
DIRECTION q; (12–14)
Display window 2
DSG qk (15, 18)
FUNCTION ql (8–14, 18)

P – V

PHONES jack qf
PLAY MODE/TUNING MODE

qd (8–11, 14)
Remote sensor 4
REPEAT/FM MODE qs (8, 11)
TAPE nN qj (12–14)
TAPE X qj (12–14)
TUNER AM qg (9–11)
TUNER FM qg (9–11)
TUNING +/– 3 (9–11)
VOLUME +/– 6 (17)

SECTION 2

GENERAL

Illustration number

PLAY MODE qg (9, 13, 14)

Name of button/part Reference page

r

RR

BUTTON DESCRIPTIONS

@/1 (power) 1 (7, 10, 15, 17)
m/M 3 (8, 12)
l/L 3 (8, 9, 14)
x 5 (8, 12, 13)
Z CD 8 (8)
z REC qh (13)

Remote Control

ALPHABETICAL ORDER

A – M

CD REPEAT qk (8)
CD N ws (8, 9)
DIR MODE ql (12–14)
DISPLAY 2 (11, 16)
DSG 1 (15)
ENTER qd (7, 10, 14, 15, 17)
FM MODE 9 (11)
FUNCTION qj (8–14, 18)
MEMORY qh (10)

This section is extracted from
instruction manual.

S – V

SLEEP qf (16)
TAPE nN w; (12–14)
TIMER SELECT qs (15, 17)
TIMER SET qg (7, 14, 17)
TUNER/BAND wa (9–11)
TUNING MODE/PLAY MODE

q; (8–11, 14)

VOL +/– qa (17)

123

HCD-M70

BUTTON DESCRIPTIONS

X 4 (8, 12, 14)
x 5 (8, 9, 12–14)
./> 6 (7–10, 14, 15, 17)
m/M 7 (8–12)
@/1 (power) 3 (7, 15, 17)
z REC 8 (13)

w;
ql

qk

qj

qh
qg

GB

4

Setting the clock

1

Turn on the system.

2

Press TIMER SET on the remote.

3

Press ./> on the remote
repeatedly to set the hour.

4

Press ENTER on the remote.

The minute indication flashes.

5

Press ./> on the remote
repeatedly to set the minute.

6

Press ENTER on the remote.

The clock will begin operating.

To adjust the clock

1

Press TIMER SET on the remote.

2

Press . or > on the remote to select
“SET CLOCK”, then press ENTER on the
remote.

3

Do the same procedures as step 3 to 6
above.

1

?/1

nN N

z

2

ws
wa

ML

3

lm

4

x

5
6

XX

7

Z

8

w;
ql
qk

qj
qh

qg
qf

5
6
7
8

9

0

qa

9

qsqd

0qaqsqdqf

GB

5

4

5

HCD-M70

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SET

3-2. PANEL (SIDE) (L),

PANEL (SIDE) (R)
(page 7)

3-3. TOP PANEL SECTION

(page 7)

SECTION 3

DISASSEMBLY

3-4. MECHANICAL DECK (TAPE)

(page 8)

3-5. FRONT PANEL SECTION

(page 8)

3-6. BACK PANEL ASSY

(page 9)

3-7. MAIN BOARD

(page 9)

3-8. CD MECHANISM DECK

(CDM55F-K6BD41A)
(page 10)

3-9. BASE UNIT (BU-K6BD41A)

(page 11)

3-10.LOADING BOARD

(page 11)

3-11.CAM (CDM55)

(page 12)

6

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

1

four screws
(BTP3

×

10)

2

3

panel (side) (L)

1

screw
(BTP3

×

10)

4

screw
(BTP3

×

10)

4

four screws
(BTP3

×

10)

5

6

panel (side) (R)

)

3-2. PANEL (SIDE) (L), PANEL (SIDE) (R)

HCD-M70

3-3. TOP PANEL SECTION

3

wire (flat type) (17 core)
(CN301)

4

top panel section

1

screw
(BTP3 × 10

2

7

HCD-M70

)

3-4. MECHANICAL DECK (TAPE)

qd

mechanical deck
(tape)

9

0

MD bracket (L)

two screws
(BVTT2.6

×

5)

2

3

shield case (TC)

5

connector

1

two screws
(BVTP3

4

FFC cable 8P

×

6

two screws
(BVTT2.6

8)

3-5. FRONT PANEL SECTION

1

FFC cable 18P (CN802)

1

FFC cable 20P (CN803)

1

two screws
(BVTP3

qa

two screws
(BVTT2.6

×

5)

8

TC board

7

6

screw
(BVTT2.6

×

5)

×

8)

qs

MD bracket (R

×

5)

1

FFC cable 15P (CN801)

2

4

front panel section

3

three screws
(BTP3 × 10)

connector
(CN304)

8

3-6. BACK PANEL ASSY

1

connector
(CN809)

3

back panel assy

2

four screws
(BTP3

2

two screws
(BTP3

×

10)

×

10)

HCD-M70

3-7. MAIN BOARD

1

FFC cable 17P (CN804)

1

FFC cable 21P (CN806)

2

connector
(CN101)

4

main board

3

screw
(BTP3 × 12)

9

HCD-M70

k

)

3-8. CD MECHANISM DECK (CDM55F-K6BD41A)

1

screw
(BVTP3

×

8)

3

Remove the CD mechanism dec
in the direction of the arrow.

2

two claws

7

control board

5

connector
(CN807)

6

four screws
(DIA. 2.6 × 8)

4

flexible flat cable (19 core
(CN805)

8

two screws
(BTP3

×

8)

10

9

bracket (MPEG)

0

CD mechanism deck
(CDM55F-K6BD41A)

3-9. BASE UNIT (BU-K6BD41A)

2

belt (CDM55)

B

3

Pull the tray pushing B.

4

two screws
(BTP2.6

×

6)

5

loading board

1

Rotate the gear(B) in
the direction of arrow

A

.

A

2

base unit
(BU-K6BD41A)

1

floating screw
(PTPWHM2.6)

HCD-M70

3-10. LOADING BOARD

11

HCD-M70

3-11. CAM (CDM55)

3 spacer (55)

4 pulley (LDG)

2 lever (SW)

1 torsion spring

6 gear (B)

5 gear (A)

7 roller

8 cam (CDM55)

12

V

attenuator

set

MAIN board
AUDIO IN (MD/VIDEO) jack (SJ302)
L-CH, R-CH

1) 315 Hz

2) 10 kHz

50 mV (– 23.8 dB)





600

Ω

blank tape
CN-123

AF OSC

+
–

set

recorded
portion

MAIN board
SPEAKER terminals (SJ301)
L-CH, R-CH

level meter

RV101 (L)

RV201 (R)









REC Bias
Adjustment

– TC BOARD (Component Side) –

SECTION 4

TEST MODE

HCD-M70

SECTION 5

ELECTRICAL ADJUSTMENTS

[COLD RESET]

• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:

1. Turn ON the power.

2. Press three buttons of x , [DSG], and CD X simultaneously.

3. The set is reset.

[LIQUID CRYSTAL DISPLAY ALL LIT CHECK
MODE]

Procedure:

1. Set to standby state.

2. Press three buttons of x , [DSG], and

[PLAY MODE/TUNING MODE] simultaneously.

3. Liquid crystal display are all turned on.

4. To exit from this mode, press the I/1 button to turn the power

OFF.

[TAPE DECK AGING MODE]

This mode can be used for operation check of tape deck section.

Procedure:

1. Set a tape in the tape deck.

2. Set to standby state.

3. Press three buttons of x , [DSG], and [CD SYNCHRO] si-

multaneously.

4. The aging is executed in bellow sequence.

5. To exit from the aging mode, press the I/1 button to turn the

power OFF.

Aging mode sequence:

FWD Play

REC pause for 3 seconds

FWD REC

Fast forward

REV Play

Start

1 minute

3 minutes

Shut off

Shut off

Shut off

[CD AGING MODE]

This mode can be used for operation check of CD section.

Procedure:

1. Load a CD disc.

2. Set to standby state.

3. Press three buttons of x , [DSG], and [REPEAT/FM MODE] simul-
taneously.

4. The aging is executed in bellow sequence.

5. To exit from the aging mode, press the I/1 button to turn the
power OFF.

Aging mode sequence:

Start

Open the disc tray

Close the disc tray

Play the last track

[CHANGE-OVER MD/VIDEO]

Procedure:

1. Set to standby state.

2. Press the [DSG] and the [FUNCTION] buttons simultaneously.

3. The function change over to MD or VIDEO by turns.

[CHANGE-OVER THE AM TUNING INTERVAL]
(Except AEP and UK models)

•The AM tuning interval can be changed over 9 kHz or 10 kHz.

Procedure:

1. Press the I/1 button to turn the power ON.

2. Select the function “TUNER”, and press the [TUNER AM]

button to select the “AM”.

3. Press the I/1 button to turn the power OFF.

4. Change over to 9 kHz:

Press the [TUNING --] and the [TUNER AM] buttons simulta-
neously.
Change over to 10 kHz:
Press the [TUNING +] and the [TUNER AM] buttons simulta­neously.

DECK SECTION

Note: Confirm each contents of this section first of all. If the results are

not satisfied, do the adjustment.

0 dB=0.775 V

1. The adjustments should be performed with the rated power sup­ply voltage unless otherwise noted.

2. The adjustments should be performed in the order given in this
service manual.

3. The adjustments should be performed for both L-CH and R­CH.

REC Bias Adjustment

Procedure:

1. Mode: REC

FUNCTION: VIDEO

2. Mode: Playback

3. Confirm playback the signal recorded in step 1 become speci-

fied values as follows.
If these values are out of specification values, adjust the RV101
(L-CH) and RV201 (R-CH) on the TC board to repeat steps
1and 2.

Specified values:Playback output of 315 Hz to playback

output of 10 kHz: ± 0.5 dB

Adjustment Location: TC board

CD SECTION

Note:

1. CD Block is basically constructed to operate without adjust­ment.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the fol­lowing checks.

5. Check the focus bias check when optical block is replaced.

Focus Bias Check

BD board

TP (RF)
TP (VC)

Procedure :

1. Connect oscilloscope to TP (RF) and TP (VC) on the CD board.

2. Press the I/1 button to turn the power on, and press
the Z CD button to open the CD disc tray.

3. Put disc (YEDS-18) in and press the CD N button to play-
back.

4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.

Checking Location:

– CD BOARD (Conductor Side) –

oscilloscope

(DC range)

+
–

level:

1.1

s

VOLT/DIV: 200 m
TIME/DIV: 500 ns

±

0.2 Vp-p

REC pause for 3 seconds

REV REC

Rewind

1 minute

3 minutes

Shut off

IC103

TP (RF)

TP (VC)

1313

HCD-M70

6-1. BLOCK DIAGRAM – CD SERVO Section –

SECTION 6

DIAGRAMS

PICK-UP BLOCK

(KSS-213DCP)

DETECTOR

LASER DIODE

OPTICAL

I-V AMP

VCC

7 D+5V

4

2

1

5

10

6

LD

LDPD

PD

AUTOMATIC

POWER

CONTROL

Q101

FOCUS/TRACKING ERROR AMP

A

5

B

6

C

7

D

8

F

10

FI-V AMP

E

11

EI-V AMP

LD

3

APC LD

AMP

APC PD

AMP

PD

4

RF AMP

IC103

RF

SUMMING

AMP

ERROR AMP

FOCUS

TRACKING

ERROR AMP

RF EQ

AMP

RFO

LD ON

HOLD SW

FILTER

54 56 53 55

ERROR

FILI

PCO

FILO

CLTV

CORRECTOR

16k

RAM

RFAC

16

FE

14

TE

13

22

21

ASYMMETRY

51

CORRECTION

ASYI

49

ASYO

48

XLON

SUBCODE

PROCESSOR

CPU INTERFACE

SQSO

DIGITAL

PLL

SENS

DEMODULATOR

SERVO AUTO

SEQUENCER

XLAT

SCOR

CLOK

EFM

DATA

SQCK

2576208114

DIGITAL SIGNAL PROCESSOR,

DIGITAL FILTER, D/A CONVERTER

IC101 (1/2)

D/A

INTERFACE

INTERNAL BUS

SERVO

INTERFACE

MIRR/DFCT/FOK DETECTOR

SSTP

IC101 (2/2)

SCLK

9 27

TO

S101

(LIMIT)

DIGITAL

SERIAL

IN

INTERFACE

DIGITAL

CLV

MDP

26

OUT

NOISE SHAPER

XRST

3

DIGITAL

FILTER

INTEGRATOR

CLOCK

GENERATOR

TIMING

LOGIC

XTAL

X101

16.9344MHz

Q800

Q800, 801

CD ON SWITCH

PWM

&

XTAO

6766

Q801

D OUT

AOUT1

AOUT2

60

70

77

AIN1

515171

AIN2

76

BUFFER

CLK

SQSO

LOUT1

LOUT2

72

75

OPTICAL

TRANSCEIVER

IC321

R-CH

DIGITAL OUT (CD)

CD-L

CLK, SQSO

OPTICAL

A

B

(Page 16)

(Page 15)

2-AXIS DEVICE

(TRACKING)

(FOCUS)

M102

(SLED)

M101

(SPINDLE)

10

CD-DATA

11

C-SQCK
C-LATCH

19

C-SENSE

18

C-SCOR

100

C-RST

86

13

HOLD

41 39 4340

FE

TE

SE

RFDC

SPINDLE/SLED MOTOR DRIVE,
FOCUS/TRACKING COIL DRIVE

IC102

CH2OUTF

12

CH2OUTR

11

CH1OUTF

14

CH1OUTR

13

CH3OUTF

17

MM

MM

18

CH4OUTF

15

CH4OUTR

16

CH3OUTR

MOTOR

COIL

DRIVE

DRIVE

COIL

DRIVE

MOTOR

DRIVE

MOTOR

DRIVE

CH2 FIN
CH2RIN

CH1FIN

CH1RIN

CH3FIN

CH3RIN

CH4SIN

5
6

2
3

24
23

25

TRDR

31

TFDR

30

FRDR

33

FFDR

32

SFDR

28

SRDR

29

A/D

CONVERTER

PWM GENERATOR

FOCUS/TRACKING/SLED

SERVO DSP

FOCUS/TRACKING/SLED

TO

SERVO
INTERFACE
IC101 (1/2)

DETECTOR

MIRR/DFCT/FOK

DFCT

FOK

23 2224

MIRR

DIGITAL SERVO

PROCESSOR

IC101 (2/2)

R-CH : R-ch is omitted due to same as L-ch.

SIGNAL PATH

: CD PLAY (ANALOG)

: CD PLAY (DIGITAL OUT)

SYSTEM CONTROLLER

IC801 (1/3)

CD-ON

C

(Page 16)

MUTE

MUTE

20

1414

6-2. BLOCK DIAGRAM – TUNER/TAPE DECK Section –

TU1

TUNER UNIT

FM ANT

ANT GND

ANT GND

AM ANT

4

L-CH

3

R-CH R-CH

5

TUNED

9

DI

8

CK

10

CE

7

DO

TUNER ON SWITCH

Q804

(Page 16)

(AEP, UK)

FM75Ω

FM75Ω

(EXCEPT AEP, UK)

AM

TU-ON

D

ANENNA

17

TUNED

5

TU-DATA

8

C-CLK/TU-CLK

31

TU-CE

23

TU-COUNT

SYSTEM CONTROLLER

IC801 (2/3)

MOT-CON

SOL-CON

SENSOR

T-MODE

TC-SW

HCD-M70

TU-L

(TAPE DECK BLOCK)

30

29

1

6

32

CAPSTAN/REEL

MOTOR DRIVE

Q341, 343

TRIGGER

PLUNGER DRIVE

Q342, 344

MM

(CAPSTAN/REEL)

E

(Page 16)

(Page 14)

CLK, SQSO

B

L-CH

R-CH

HRPE901

(RECORD/PLAYBACK/ERASE)

ERASE

RV201

REC BIAS

(R)

MUTING

Q100, 101

REC BIAS

BIAS OSC

T401

DET AMP

Q302

RV101

(L)

1

FM DET MUX

(AEP, UK)

R-CH

R-CH

4

X301

4.332MHz

R-CH

REC BIAS

SWITCH

Q402, 403

X1 X0

13 14

MUTING

CONTROL SWITCH

Q404, 405

RDATA

RDS DECODER

COM +8V

RCLK

IC326

6
5

INPUT2
INPUT1

LOADING

MOTOR DRIVE

IC320

OPEN

CLOSE

10

OUT2

2

OUT1

DISC TRAY

OPEN/CLOSE DETECT

M901

MM

(LOADING)

S1

D321

2

16

CLK

SQSO

12

C-SQSO/RDS-DATA

2

RDS-IN

D401

ALC21REC/PB

14

REC-MUTE20L-MUTE

16

TRAY-OPEN

TRAY-CLOSE

TRAY-SW

95
94

33

R-CH : R-ch is omitted due to same as L-ch.

SIGNAL PATH

: TUNER (FM/AM)

: TAPE PLAY

: REC

TC-L

REC-L

F

G

(Page 16)

(Page 16)

T101

BIAS

TRAP

34

16

BIN (L)

REC-OUT
(L)

REC/PB EQ AMP, ALC

IC401

EQ

R-CH

ALC

R-CH

EQ-OUT (L)

REC-IN

(L)

ALC

(L)

11

1513 14

A/B

ALC

MUTE

REC MUTE

28

24

23

27

MUTE

TAI (L)

PB-OUT

(L)

26

BIAS OSC

Q401

1515

HCD-M70

6-3. BLOCK DIAGRAM – MAIN Section –

REC-L

(Page 15)

(Page 14)

(Page 15)

(Page 15)

G

A

F

E

AUDIO IN

MD (VIDEO)

X800

32.768KHz

X801

4.19MHz

CD-L

TC-L

TU-L

SJ302

L

R

TX

92

93

TEX

XTAL1

40

EXTAL1

39

R-CH

54 – 85

SEG0 – SEG31

R-CH : R-ch is omitted due to same as L-ch.

SIGNAL PATH

: TUNER (FM/AM)

: TAPE PLAY

: REC

: CD PLAY

: MD (VIDEO)

(Page 15)

(Page 14)

TU-ON

D

CD-ON

C

LIQUID CRYSTAL

DISPLAY

LCD801

COM0 – COM3

D814

(STANDBY)

D812

TAPE

50 – 53

L4

11

L3

12

L2

13

L1

14

S801 – 820

LED DRIVE

Q810, 811

LED DRIVE

Q808

INPUT

LSELO

SELECT

SWITCH

REMOTE CONTROL

RECEIVER

IC802

3

SIRCS

10

98

36 – 34

STAND-BY LED

TC-ON96

LIN

VOLUME

9

CONTROL

CPU

INTERFACE

DI

CL2CE

301

88

28

87

SCK

SDA

AU-CE

SYSTEM CONTROLLER

IC801 (3/3)

KEY1 – KEY3

TONE

CONTROL

INPUT SELECT SWITCH,

ELECTRICAL VOLUME,

TONE CONTROL

IC323

97AU-MUTE

22AMP-MUTE

24H/P CHK

9SPK PROTECT

99

WP

RST

38

26

DSG

CD-SYNC

27

25TU-ON

15CD-ON

7

REG-CON

LOUT

5

LED DRIVE

Q807

LED DRIVE

Q809

MUTING

CONTROL SWITCH

Q312, 313

WAKE UP

SWITCH

Q802, 803

RESET SIGNAL

GENERATOR

IC803

D811

DSG

D813

CD SYNC

LED DRIVE

Q806

LED DRIVE

Q805

SW +5V

U-COM +5V

D804, 805,

D807, 808

(LCD BACK LIGHT)

D811

TUNER

D809

CD

MUTING

Q100

POWER ON

MUTING

Q330

TC +5V

CD +5V

D309

R-CH

D801

D802

COM +12V

REGULATOR

HEADPHONE AMP

IC324

IN+

3

4

IN+
MUT

MUTE STBY

R-CH

BACKUP +5V

COM +8V

+5V

Q309

CD +8V

TU +9.5V

TUNER ON

SWITCH

Q303, 304

+5V

REGULATOR

Q306

CD ON

SWITCH

Q307, 308

STANDBY/MUTE

10

9

REGULATOR

+8V

REGULATOR

IC304

+8V

REGULATOR

IC306

+9.5V

REGULATOR

Q301

+9.5V

REGULATOR

Q305

R-CH

MOS GAIN &
LEVEL SHIFT

ING STAGE

R-CH

+5V

Q901, 903

COM +12V

MUTING

Q408, 409

OUTPUT

D917

+12V

REGULATOR

Q355

MOS

STAGE

AMP +16V

AMP – 16V

SHORT

CIRCUIT

PROTECTION

POWER AMP

IC101

RECT

D910 – 913

OUT

14

RECT

D906 – 909

RECT

D902 – 905

POWER ON/OFF

RELAY DRIVE

RELAY DRIVE

Q902
Q902

R-CH

DC DETECT

Q310, 311

T901

SUB POWER

TRANSFORMER

T902

MAIN POWER

TRANSFORMER

RY901

R-CH

R-CH

J301

PHONES

+

L

–

–

R

+

(EXCEPT Singapore)

SJ301

SPEAKER

IMPEDANCE

USE 6 – 16Ω

VOLTAGE

SELECTOR

S901

(Singapore)

(AC IN)

1616

HCD-M70

d

6-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• W : indicates side identified with part number.

f

•

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

• Indication of transistor.

: internal component.

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

•

• C : panel designation.

• A : B+ Line.

• B : B– Line.

• H : adjustment for repair.

•Voltages are taken 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 : TAPE PLAY
a : REC
J : CD PLAY (ANALOG)
c : CD PLAY (DIGITAL OUT)
j : MD (VIDEO)

AUS: Australian model
CND : Canadian model
KR : Korean model
MX : Mexican model
SP : Singapore model
TH : Thai 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

POWER board

VIDEO board

SWITCH board

MAIN board

JACK board

TC board

CONTROL boar

CD board

LOADING board

1717