Sony HCD-BX9, HCD-DX9 Service Manual

HCD-BX9/DX9

SERVICE MANUAL

Ver 1.2 2001.08

HCD-BX9/DX9 is the tuner, deck, CD and
amplifier section in MHC-BX9/DX9.

Photo: HCD-DX9

CD

SECTION

TAPE DECK

SECTION

Model Name Using Similar Mechanism HCD-BX7/DX7/DX7J

CD Mechanism Type CDM58-K2BD38

Base Unit Type BU-K2BD38

Optical Pick-up Type KSM-213DAP/ZNP

Model Name Using Similar Mechanism HCD-BX7/DX7/DX7J

Tape Transport Mechanism Type TCM-230MWR11

AEP Model

UK Model

HCD-BX9

E Model

Australian Model

HCD-DX9

Amplifier section

European model:

DIN power output (rated)

130 + 130 W
(6 Ω at 1 kHz, DIN)

Continuous RMS power output (reference)

170 + 170 W
(6 Ω at 1 kHz, 10% THD)

Other models:

The following measured at AC 120, 220, 240 V
50/60 Hz
DIN power output (rated)

220 + 220 W
(4 Ω at 1 kHz, DIN)

Continuous RMS power output (reference)

300 + 300 W
(4 Ω at 1 kHz, 10% THD)

Inputs
MD/VIDEO (AUDIO) IN:
(phone jacks)

voltage 450 mV/250 mV,
impedance 47 kΩ

MIC:
(phone jack)

sensitivity 1 mV,
impedance 10 kΩ

Outputs
PHONES:
(stereo mini jack)

accepts headphones of 8 Ω or more

FRONT SPEAKER:

HCD-BX9:
accepts impedance of 6 to 16 Ω
HCD-DX9:
accepts impedance of 4 to 16 Ω

9-929-239-13

2001H0200-1

© 2001.8

Sony Corporation

Home Audio Company

Shinagawa Tec Service Manual Production Group

SPECIFICATIONS

CD player section

System

Compact disc and digital audio system

Laser

Semiconductor laser (λ=780 nm)
Emission duration: continuous

Laser output

Max. 44.6 µW*
*This output is the value measured at a
distance of 200 mm from the objective
lens surface on the Optical Pick-up Block
with 7 mm aperture.

Frequency response

2 Hz – 20 kHz (±0.5 dB)

Wavelength

780 – 790 nm

Signal-to-noise ratio

More than 90 dB

Dynamic range

More than 90 dB
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)

Wavelength 660 nm

Output Level –18 dBm

Tape player section

Recording system

4-track 2-channel stereo
Frequency response (DOLBY NR OFF)

40 – 13,000 Hz (±3 dB),

using Sony TYPE I cassette

COMPACT DISC DECK RECEIVER

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range

87.5 – 108.0 MHz

Antenna

FM lead antenna

Antenna terminals

75 Ω, unbalanced

Intermediate frequency

10.7 MHz

AM tuner section

Tuning range
BX9, Saudi Arabia models:

531 – 1,602 kHz
(with the interval set at 9 kHz)

Other models:

531 – 1,602 kHz
(with the interval set at 9 kHz)
530 – 1,710 kHz
(with the interval set at 10 kHz)

Antenna

AM Loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz

— Continued on next page —

1

SECTION 4

TEST MODE

[MC 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. Press three buttons x , ENTER , and ?/1 simulta-neously.

2. The fluorescent indicator tube displays “COLD RESET” and

the set is reset.

[CD Ship Mode]

• This mode moves the pickup to the position durable to vibra­tion. Use this mode when returning the set to the customer after
repair.

Procedure:

1. Press ?/1 button to turn the set ON.

2. Press CD button and ?/1 button simultaneously.

3. After the "STANDBY" display blinks six times, a message

“LOCK” is displayed on the fluorescent indicator tube, and the
CD ship mode is set.

[MC Hot Reset]

• This mode resets the set with the preset data kept stored in the
memory. The hot reset mode functions same as if the power
cord is plugged in and out.

Procedure:

1. Press three buttons x , ENTER , and DISC 1 simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[CD Service Mode]

• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.

Procedure:

1. Press ?/1 button to turn the set ON.

2. Select the function “CD”.

3. Press three buttons x , ENTER , and OPEN/CLOSE simul-

taneously.

4. The CD service mode is selected.

5. With the CD in stop status, turn the shuttle knob clockwise to

move the pickup to outside track, or turn the shuttle knob
counter-clockwise to inside track.

6. To exit from this mode, perform as follows:

1) Move the pickup to the most inside track.

2) Press three buttons in the same manner as step 2.

Note: • Always move the pickup to most inside track when exiting from

this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be
chipped.

[Change-over of MW Tuner Step between 9 kHz and
10 kHz]

• A step of MW channels can be changed over between 9 kHz
and 10 kHz.

Procedure:

1. Press ?/1 button to turn the set ON.

2. Select the function “TUNER”, and press TUNER/BAND

button to select the BAND “MW”.

3. Press ?/1 button to turn the set OFF.

4. Press ENTER and ?/1 buttons simultaneously, and the display

of fluorescent indicator tube changes to “MW 9 k STEP” or
“MW 10 k STEP”, and thus the channel step is changed over.

[GC Test Mode]

• This mode is used to check the software version, FL tube, LED,
keyboard and VACS.

Procedure:

1. Press three buttons x , ENTER , and DISC 2 simultaneously.

2. LEDs and fluorescent indicator tube are all turned on.

3. When you want to enter the software version display mode,

press DISC 1 . The model number and destination are displayed.

4. Each time DISC 1 is pressed, the display changes starting

from MC version, GC version, VC version, CD version, CM
version, ST version, TC version, TA version, TM version and
BR version in this order, and returns to the model number and
destination display.

5. When DISC 3 is pressed while the version numbers are being

displayed except model number and destination, year, month
and day of the software creation appear. When DISC 3 is
pressed again, the display returns to the software version display.
When DISC 1 is pressed while year, month and day of the
software creation are being displayed, the year, month and day
of creation of the software versions are displayed in the same
order of version display.

6. Press DISC 2 button, and the key check mode is activated.

7. In the key check mode, the fluorescent indicator tube displays

“KEY0 VOL0”. Each time a button is pressed, “KEY” value
increases. However, once a button is pressed, it is no longer
taken into account.
“VOL” value increases like 1, 2, 3 ... if rotating VOLUME
knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.

8. Also when DISC 3 is pressed after lighting of all LEDs and FL

tubes, value of VACS appears.

9. To exit from this mode, press three buttons in the same manner

as step 1, or disconnect the power cord.

[VACS ON/OFF Mode]

• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).

Procedure:

Press the ENTER and SPECTRUM buttons simultaneously. The
message “VACS OFF” or “VACS ON” appears.

12

[MC Test Mode]

• This mode is used to check operations of the respective sections
of Amplifier, Tuner, CD and Tape.

Procedure:

1. Press the ?/1 button to turn on the set.

2. Press the three buttons of x , ENTER and DISC 3

simultaneously.

3. A message “TEST MODE” appears on the FL display tube.
4 When f (CURSOR UP) button is pressed, GEQ increases to

its maximum and a message “GEQ ALL MA” appears.

5. When F (CURSOR DOWN) button is pressed, GEQ decreases

to its minimum and a message “GEQ ALL M1” appears.

6. When g (CURSOR LEFT) or G (CURSOR RIGHT) button

is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.

7. When the VOLUME control knob is turned clockwise even
slightly, the sound volume increases to its maximum and a
message “VOLUME MAX” appears for two seconds, then the
display returns to the original display.

8. When the VOLUME control knob is turned counter-clockwise
even slightly, the sound volume decreases to its minimum and
a message “VOLUME MIN” appears for two seconds, then
the display returns to the original display.

9. In the test mode, the default-preset channel is called even when
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory, by operating the Shuttle
knob. (It means that the memory is cleared.)

10. When CD is selected and the EDIT button is pressed, the disc
that is being chucked at this moment becomes the default
setting. It means that the default disc only is accessed when
any other discs are selected even though the display indication
changes accordingly. At the same time, the DISC SKIP EX­CHANGE and OPEN/CLOSE cannot be accepted. (It means
that the tray motor and the turntable motor are disabled of their
operation.)

11. When a tape is inserted in Deck B and recording is started, the
input source function selects VIDEO automatically.

12. When x button is pressed to stop recording, the Tape (Deck)
B is selected and tape is rewound using the Shuttle knob, tape
is rewound, tape is stops at around the record-starting position
and playback of the recorded portion of the tape is started. If
PAUSE is inserted even once during recording, tape is rewound
to the position around the PAUSE position and is played back.

13. When the CD SYNC HI-DUB Button is press during playback
of Deck B, either normal speed or high speed can be selected
by this button.

14. Select the desired loop by pressing the PLAY MODE button.
Insert a test tape AMS-110A or AMS-RO to Deck A.

15. Press the SPECTRUM button to enter the AMS test mode.

16. After a tape is rewound first, the FF AMS is checked, and the
mechanism is shut off after detecting the AMS signal twice.

17. Then the REW AMS is checked and the mechanism is shut off
after detecting the AMS signal twice.

18. When the check is complete, a message of either OK or NG
appears.

19. When you want to exit this mode, press the ?/1 button twice.
The cold reset is enforced at the same time.

13

[Aging Mode]

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

• If an error occurred:
The aging operation stops and display status.

• If no error occurs:
The aging operation continues repeatedly.

1. Operating method of Aging Mode

Turn on the main power and select “CD” of the function.

1) Set a disc in DISC1 tray. Select ALL DISC CONTINUE, and REPEAT OFF.

2) Load the tapes recording use into the decks A and B respectively.

3) Press three buttons x , ENTER , and

DISC SKIP/EX-CHANGE simultaneously.

4) Aging operations of CD and tape are started at the same time.

5) To exit the aging mode, perform [MC Cold Reset].

3. Aging Mode in CD section

1) Display state

• No error occurs

Display

AGING[*][*][*][*]

Note:

[*][*][*][*]

Error display

E ** s ## $$ %%

12 34 5

1 **

2 s
3 ##

4 $$

5 %%

: Number of aging operations

The error No. 00 indicates the newest error. As the error No. increases, it means the older error.
When you want to retrieve the error history, press the PLAY MODE button in the case of mechanism error.
Or press the REPEAT button in the case of NO DISC error.

M: Mechanism error

Don’t care

High order digits only
D: Stopped during closing due to problems other than mechanism.
E: Stopped during opening due to problems other than mechanism.
C: Stopped during chucking due to problems other than mechanism.
F: Stopped during EX-opening due to problems other than mechanism.

Emergency related errors (High order digits only)
1: Stopped during chuck-up
2: Stopped during chuck-down
3: Time out by EX-OPEN
5: Time out by EX-CLOSE

D: No disc error

01: FOCUS ERROR
02: GFS ERROR
03: SETUP ERROR

01: NO DISC judgment without chucking retry
02: NO DISC judgment after chucking retry

Status at the time of NO DISC judgment
(High order digits only)
1: STOP
2: SETUP
3: TOC READ
4: ACCESS
5: PLAY BACK
6: PAUSE
7: MANUAL SEARCH (PLAY)
8: MANUAL SEARCH (PAUSE)

• When the buttons x , ENTER and DISC 1 are pressed simultaneously, number of time of the mechanism error and the NO DISC error
can be checked.
Display: EMC**EDC** **: Number of times of error (Maximum three times)

EMC: Mechanism error
EDC: NO DISC error

• When aging operation is complete, be sure to perform the MC Cold Reset to reset the error history.

14

2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) The disc tray opens and closes.
(2) The mechanism accesses DISC 2 and makes an attempt to

read TOC. However, since there are no discs, a message
“CD2 NO DISC” appears.

(3) The mechanism accesses DISC 3 and a message “CD3 NO

DISC” appears.
(4) The disc tray turns to select a disc1.
(5) A disc is chucked.
(6) TOC of disc is read.
(7) The pickup accesses to the track 1, and playing 2 seconds.
(8) The pickup accesses to the last track, and playing 2 seconds.
(9) Every time when an aging operation of step 1 to step 8 is

complete, the display “AGING[*][*][*][*]” value increases

as the number of aging operations is counted up.
(10) Returns to step 1.

3. Aging Mode in Tape Deck section

1) Display state

• No error occurs

Display action now

• Error occurred

Display action last time

NO. Display action Action contents Final timing

1 TAPE A AG-1 Rewind the TAPE A, B The top of tape

2 TAPE A AG-2 FWD play the TAPE A 2 minutes playing

3 TAPE A AG-3 F.F. the TAPE A 20 second FF or the end

4 TAPE A AG-4 REV play the TAPE A 2 minutes playing

5 TAPE A AG-5 Rewind the TAPE A The top of tape

6 TAPE B AG-2 FWD play the TAPE B 2 minutes playing

7 TAPE B AG-3 F.F. the TAPE B 20 second FF or the end

8 TAPE B AG-4 REV play the TAPE B 2 minutes playing

9 TAPE B AG-5 Rewind the TAPE B The top of tape

of tape

of tape

2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) Rewind is executed up to the top of tape A and B.
(2) A tape on FWD side is played for 2 minutes.
(3) FF is executed up to either made for 20 second or the end of

tape.

(4) A tape is reversed, and the tape on REV side is played for 2

minutes.
(5) Rewind is executed up to the top of tape.
(6) Returns to step 2, and repeat steps from 2 to 5.

[Function Change Mode]

* elect either VIDEO or MD of the external FUNCTION input.

Procedure:

1. Turn on the power.

2. Press the two buttons ENTER and ?/1 at the same time.

The main power is turned on and the other function of the
previous function is selected and displayed. “MD” or
“VIDEO”.

15

HCD-BX9/DX9

7-2. BLOCK DIAGRAMS

– TUNER/CD SECTION –

FM 75Ω

AM

G

TM601

1

1

1

3

DX9 MODEL

FE601

ANT IN

BX9 MODEL

FE603

ANT IN

RB641

IF OUT

OSC OUT

13

1

FM IF

9

IF OUT

12

AM/IF

24

AM OSC

13

VCO STOP

8

IF REQ MUTE

20

AM RF IN

22

AM OSC

23

V REG

AM/FM IF MPX

IC601

AM MIX OUT

FM SD ADJ

FM/AM DET

TUNED

STEREO

L OUT

R OUT

11

10

18AM IF IN

19

3

16

6

17

BUFFER

Q611

R-CH

IFT601

RV611

IC681

31

XT681

4.332MHz

Q602

Q602

RF IF
AMP

10

1

24

15

18

17

19

FM

XIN

XOUT

FM OSC

VT1 IN

VT1

PD1

PLL

IC651

FM/AM IF

AM OSC

12

FM

7

14

2VCO STOP

8IF REQ

DO

6DO

DI

DI

4DI

CL

CE

CL

5

CE

3

7

8

VT

5

7IF OUT

8OSC OUT

5VT

14

4

55

1511

67

R601

9

CF601 CF602

+B A+12V

X651

4.5MHz

LPF601

LPF

4

14

13

MUX

XO

XI

MODEL

RDS

IC682

DATA

BX9

INT

L-CH

A

MAIN

SECTION

• RCH is omitted

• Signal Path

: FM

(Page 23)

: CD

: DIGITAL OUT

MASTER CONTROL

IC401(1/2)

2

16

21

20

24

23

RDS DATA

RDS INT

TUNED

STEREO

OPTICAL PICK-UP

BLOCK

(KSM-213DAP)

VC

A

B

C

D

E

F

LD

GND

PD

VR

F+

FOCUS

09

COIL

TRACKING

COIL

F-

T+

T-

+5V

Q101

DRIVE

M102
SLED

MOTOR

M101

SPINDLE

MOTOR

22

122

DO

DI

CL

CE

DIGITAL SERVO

DIGITAL SIGNAL PROC.

RF AMP

IC103

12

VC

5

6

7

8

11

10

LD

3

4

MOTOR/COIL DRIVE

13

CH1RO

14

CH1FO

11

CH2RO

12

CH2FO

18

CH3RO

RFO

IC102

RFI

FE

TE

CH1RI

CH1FI

CH2RI

CH2FI

CH3RI

16

17

14

13

22LD ON

21HOLD SW

3

2

6

5

23

A

B

C

D

E

F

LD

PD

D/A CONV.

IC101

D OUT

60

51

RFAC

43

RFDC

L OUT

R OUT

SCLK

SCOR

SQSO

SSTP

XTAI

XTAO

72

75

5DATA

7CLOK

6XLAT

2SQCK

9

20

1

27

66

67

R-CH

X101

16.9344MHz

39

FE

41

TE

40

SE

14

XLON

32

FFDR

33

FRDR

30

TFDR

31

TRDR

29

SRDR

S101
LIMIT
IN SW

IC201

OPTICAL

DIGITAL

OUT

CD

DIGITAL OUT

L OUT

B

MAIN

SECTION

(Page 23)

ST MUTE

27

ST DIN

26

ST DOUT

28

ST CLK

25

ST CE

33

CD DATA

37

CD CLK

42

XLT

33

SQ CLK

19

SCOR

32

SQ DATA

BU UP/DOWN SW

MTR CNT2

T SENS

IC701

44

45MTR CNT1

49

46OPEN SW

47CLOSE SW

48

9

MOTOR

DRIVE

7

TBL ADDRESS

4

2

IC711

SENSOR

OPEN/CLOSE

S701

S711

BU UP/

DOWN

M721

M

TURN

MOTOR

M

17

16

CH3FO

CH4RO

24CH3FI

25CH4INS

28

SFDR

26

MDP

3XRST

43

XRST

M

15

CH4FO

MUTE

20

41

HOLD

22

22