Sony HCD-EX8T, HCD-EX9T, HCD-EX9, HCD-EX8, HCD-EX6 User Manual

HCD-EX6/EX6T/EX8/

EX8T/EX9/EX9T

SERVICE MANUAL

Ver. 1.1 2010.12

• HCD-EX6 is the amplifi er, USB, CD player
and tuner section in MHC-EX6.

• HCD-EX6T is the amplifi er, USB, CD player,
tape deck and tuner section in MHC-EX6T.

• HCD-EX8 is the amplifi er, USB, CD player
and tuner section in MHC-EX8.

• HCD-EX8T is the amplifi er, USB, CD player,
tape deck and tuner section in MHC-EX8T.

• HCD-EX9 is the amplifi er, USB, CD player
and tuner section in MHC-EX9.

• HCD-EX9T is the amplifi er, USB, CD player,
tape deck and tuner section in MHC-EX9T.

• MPEG Layer-3 audio coding technology and pat-

ents licensed from Fraunhofer IIS and Thomson.

• Windows Media is a registered trademark of

Microsoft Corporation in the United States and/or
other countries.

CD Section

Tape Deck Section
(HCD-EX6T/EX8T/EX9T)

Photo: HCD-EX9T

E Model

Model Name Using Similar Mechanism New

Mechanism Type CDM88CL-D1BD74UR

Optical Pick-up Block Name DA11MMVGP

Model Name Using Similar Mechanism HCD-EC69T/EC79T/EC99T

Tape Transport Mechanism Type TCM-J1 or CS-21SC-901TP

Amplifi er section

The following measured at AC 127 V,
60 Hz (Mexican model)
The following measured at AC 220 V,
50/60 Hz (Argentine model)
The following measured at AC 120 V,
220 V, 240 V, 50/60 Hz (Other models)

HCD-EX9/EX9T

Front Speaker:
Power output (rated):
Low channel
40 W + 40 W (at 8 Ω, 1 kHz, 1%
THD)
High channel
40 W + 40 W (at 8 Ω, 1 kHz, 1%
THD)
RMS output power (reference):
Low channel
85 W + 85 W (per channel at 8 Ω,
1 kHz)
High channel
85 W + 85 W (per channel at 8 Ω,
1 kHz)
Subwoofer:
RMS output power (reference):
125 W (at 4 Ω, 80 Hz)

HCD-EX8/EX8T

Power output (rated):
Low channel
50 W + 50 W (at 8 Ω, 1 kHz, 1%
THD)
High channel
50 W + 50 W (at 8 Ω, 1 kHz, 1%
THD)

SPECIFICATIONS

RMS output power (reference):
Low channel
100 W + 100 W (per channel at 8 Ω,
1 kHz)
High channel
100 W + 100 W (per channel at 8 Ω,
1 kHz)

HCD-EX6/EX6T

Power output (rated):
40 W + 40 W (at 6 Ω, 1 kHz, 1%
THD)
RMS output power (reference):
90 W + 90 W (per channel at 6 Ω,
1 kHz)

Inputs

PC IN (stereo mini jack):
Sensitivity 800 mV, impedance
22 kilohms

Outputs

PHONES (stereo mini jack):
accepts headphones with an
impedance of 8 Ω or more
SPEAKERS: impedance
HCD-EX9/EX9T/EX8/EX8T: 8 Ω
HCD-EX6/EX6T: 6 Ω
SUBWOOFER (HCD-EX9/EX9T only):
impedance 4 Ω

USB section

Supported bit rate:
MP3 (MPEG 1 Audio Layer-3):
32 kbps – 320 kbps, VBR
WMA: 48 kbps – 192 kbps
AAC: 48 kbps – 320 kbps

Sampling frequencies:
MP3 (MPEG 1 Audio Layer-3):
32/44.1/48 kHz
WMA: 44.1 kHz
AAC: 44.1 kHz

(USB) port:
Maximum current:
500 mA

CD player section

System:
Compact disc and digital audio
system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6μW
* This output is the value
measurement at a distance of
200mm from the objective lens
surface on the Optical Pick-up
Block with 7mm aperture.
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB

Tape deck section (HCD-EX9T/
EX8T/EX6T only)

Recording system: 4-track 2-channel, stereo

Tuner section

FM stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna

FM tuner section:

Tuning range:

87.5 MHz ‒ 108.0 MHz (50 kHz step)
Intermediate frequency: 225 kHz

AM tuner section:

Tuning range
Latin American models:
530 kHz ‒ 1,710 kHz (10 kHz step)
531 kHz ‒ 1,710 kHz (9 kHz step)
Other models:
531 kHz ‒ 1,602 kHz (9 kHz step)
530 kHz ‒ 1,610 kHz (10 kHz step)
Intermediate frequency: 53 kHz

– Continued on next page –

HCD-EX6/EX8/EX9

COMPACT DISC RECEIVER

HCD-EX6T/EX8T/EX9T

COMPACT DISC DECK RECEIVER

9-889-803-02

2010L04-1

2010.12

©

Sony Corporation

Published by Sony Techno Create Corporation

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

General

Power requirements
Mexican model:
AC 127 V, 60 Hz
Argentine model:
AC 220 V, 50/60 Hz
Other models:
AC 120 V, 220 V or 230 V ‒ 240 V,
50/60 Hz, adjustable with voltage
selector
Power consumption
HCD-EX9/EX9T: 175 W
(0.5 W at the Power Saving Mode)
HCD-EX8/EX8T: 170 W
(0.5 W at the Power Saving Mode)
HCD-EX6/EX6T: 110 W
(0.5 W at the Power Saving Mode)
Dimensions (W/H/D) (excl. speakers)
Approx. 200 mm × 306 mm ×
350 mm
Mass (excl. speakers)
HCD-EX9: Approx. 6.7 kg
HCD-EX9T: Approx. 7.0 kg
HCD-EX8: Approx. 6.6 kg
HCD-EX8T: Approx. 6.9 kg
HCD-EX6: Approx. 5.6 kg
HCD-EX6T: Approx. 5.9 kg

Design and specifi cations are subject to
change without notice.

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 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 specifi ed herein may result in hazardous radia-
tion exposure.

TABLE OF CONTENTS

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

2. DISASSEMBLY

2-1. Side Panel (R)/(L) .......................................................... 7

2-2. Top Panel Section ........................................................... 7

2-3. Tape Mechanism Deck (HCD-EX6T/EX8T/EX9T) ....... 8

2-4. Front Panel Section ......................................................... 8

2-5. MAIN Board ................................................................... 9

2-6. Back Panel Section ......................................................... 10

2-7. CD Mechanism Section .................................................. 11

2-8. Belt (DLM3A) ................................................................ 11

2-9. Base Unit ......................................................................... 12

2-10. BD74 Board .................................................................... 12

3. TEST MODE ............................................................ 13

4. MECHANICAL ADJUSTMENTS ...................... 15

5. ELECTRICAL ADJUSTMENTS ........................ 15

6. DIAGRAMS

6-1. Block Diagram –CD/Tuner Section– .............................. 21

6-2. Block Diagram –Tape/Audio Section– ........................... 22

6-3. Block Diagram –Display/Power Supply Section– .......... 23

6-4. Printed Wiring Board –CD Section– .............................. 24

6-5. Schematic Diagram –CD Section– ................................. 25

6-6. Printed Wiring Board –USB Section– ............................ 26

6-7. Schematic Diagram –USB Section– ............................... 27

6-8. Printed Wiring Board –Panel Section– ........................... 28

6-9. Schematic Diagram –Panel Section– .............................. 29

6-10. Printed Wiring Board –USB-JACK Section– ................. 30

6-11. Schematic Diagram –USB-JACK Section– .................... 30

6-12. Printed Wiring Boards –MAIN-AMP Section– .............. 31

6-13. Schematic Diagram –MAIN-AMP Section (1/2)–.......... 32

6-14. Schematic Diagram –MAIN-AMP Section (2/2)–.......... 33

6-15. Printed Wiring Board –Power Supply Section– ............. 34

6-16. Schematic Diagram –Power Supply Section– ................ 35

6-17. Schematic Diagram –Tape Deck Section

(HCD-EX6T/EX8T/EX9T)– .......................................... 36

6-18. Printed Wiring Board –Tape Deck Section

(HCD-EX6T/EX8T/EX9T)– .......................................... 37

This appliance is classifi ed as
a CLASS 1 LASER product.
This marking is located on the
rear exterior.

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

7. EXPLODED VIEWS

7-1. Overall Section ............................................................... 46

7-2. Front Panel Section ......................................................... 47

7-3. Top Panel Section (HCD-EX6T/EX8T/EX9T) .............. 48

7-4. Chassis Section ............................................................... 49

7-5. MAIN Board Section ...................................................... 50

7-6. CD Mechanism Section (CDM88CL-D1BD74UR) ....... 51

8. ELECTRICAL PARTS LIST .............................. 52

Accessories are given in the last of the electrical parts list.

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

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 fl exible 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 refl ective surface by the objective lens in the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C.
Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to fl ow)

than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

RELEASING THE DISC TRAY LOCK

The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.

MODEL IDENTIFICATION
– Back Panel –

Model Number Label

Model Part No.

EX6T: E4 model

EX6: AR model

EX8T: E4 model

EX8: AR model

EX8: MX model

EX9T: E4 model

EX9: AR model

EX9: MX model

EX6: E2, E51 models

EX8: E2, E51 models

EX9: E2, E51 models

• Abbreviation
E4 : 220 – 240V AC area in E model
AR : Argentina model
MX : Mexican model
E2 : 120V AC area in E model
E51 : Chilean and Peruvian models

: Since the HCD-EX6/EX8/EX9: E2 and E51 models have their

*

4-178-730-0[]

4-178-731-0[]

4-178-733-0[]

4-178-734-0[]

4-178-735-0[]

4-178-736-0[]

4-178-737-0[]

4-178-738-0[]

*

*

*

model number labels marked directly on the back panel, the
model number labels have no relative part numbers.

Because of this, determine the model through the marked model

number when comparing the difference between these models.

Releasing Procedure:

1. Press [

] button to turn the power on.

?/1

2. Press the [FUNCTION] button to select CD function.

3. While pressing the [x] button, press the [Z] button for more 5
seconds).

4. The message “UNLOCKED” is displayed and the disc tray is
unlocked.

Note: When “LOCKED” is displayed, the slot lock is not released by turn-

ing power on/off with the [

?/1

] button.

3

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF

Note: Please take out the side panel (R) from a set refer to DISASSEMBLY (page 7).

Pull the tray by the hand.

2

HOW TO REMOVE THE KNOB (VOL)

VOL knob

2

state of opening the CD tray

lever

gear

front panel block
(back view)

Turn a gear by a driver

1

till a lever rises up
to the position of the figure.

Push the VOL knob by the flat head driver.

hole

1

4

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION

Note: Please take out the side panel (R) from a set refer to DISASSEMBLY (page 7).

PT-POWER board

(Right side view)

In checking the PT-POWER board, make a capacitor discharge
of C013 and C014 for electric shock prevention.

PRECAUTION WHEN INSTALLING A NEW OP UNIT/
PRECAUTION BEFORE UNSOLDERING THE STATIC
ELECTRICITY PREVENTION SOLDER BRIDGE

PT-POWER board

C013 C014

00 ȍW 00 ȍW

HOW TO DISTINGUISH TAPE MECHANISM DECK
(HCD-EX6T/EX8T/EX9T only)

Two kinds of tape mechanism decks installed by this set exist.

Please do the repair exchange after confi rming which tape mecha-
nism deck set of the repair according to how to distinguish the
fi gure below.

When installing a new OP unit, be sure to connect the fl exible
printed circuit board fi rst of all before removing the static electric-
ity prevention solder bridge by unsoldering.
Remove the static electricity prevention solder bridge by unsolder­ing after the fl exible printed circuit board has already been con-
nected.
(Do not remove nor unsolder the solder bridge as long as the OP
unit is kept standalone.)

motor

Metal part: TCM-J1
Mold part: CS-21SC-901TP

Tape Deck Name

TCM-J1 A-1527-851-A

CS-21SC-901TP 1-797-575-11

Tape Deck

Part No.

tape deck

Belt Part No.

2-670-389-01 BELT (1)
3-214-817-01 BELT (FR)

2-688-621-01 BELT (R/F)
2-688-622-01 BELT (MAIN)

5

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

SECTION 2

DISASSEMBLY

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

SET

2-1. SIDE PANEL (R)/(L)
(Page 7)

2-2. TOP PANEL SECTION
(Page 7)

2-3. TAPE MECHANISM DECK
(HCD-EX6T/EX8T/EX9T)
(Page 8)

2-5. MAIN BOARD
(Page 9)

2-4. FRONT PANEL SECTION
(Page 8)

2-7. CD MECHANISM SECTION
(Page 11)

2-8. BELT (DLM3A)
(Page 11)

2-6. BACK PANEL SECTION
(Page 10)

2-9. BASE UNIT
(Page 12)

2-10. BD74 BOARD
(Page 12)

6

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

2-1. SIDE PANEL (R)/(L)

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

8 two screws
(case 3 TP2)

7 two screws
(case 3 TP2)

0 two claws

qs side panel (L)

qa

9 two screws

(+BVTP 3 u10)

6 side panel (R)

4 two claws

5

2 two screws

(case 3 TP2)

3 two screws
(+BVTP 3 u10)

2-2. TOP PANEL SECTION

EX6T/EX8T/EX9T EX6/EX8/EX9

5 top panel section

3 two screws

(+BVTP 3 u10)

4 wire (flat type) (9 core)
(CN605)

2 screw
(+KTP 3 u10)

2 screw
(+KTP 3 u10)

1 two screws
(case 3 TP2)

4 top panel section

3 two screws

(+BVTP 3 u10)

1 screw
(+KTP 3 u10)

1 screw
(+KTP 3 u10)

7

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

2-3. TAPE MECHANISM DECK (HCD-EX6T/EX8T/EX9T)

1 Open the cassette box.

2 four screws

(

+BVTP 2.6 u8

)

4 bracket (deck)

6 DECK board

2-4. FRONT PANEL SECTION

9 screw

5 wire (flat type) (9 core)

(CN604)

4 wire (flat type) (19 core)
(CN603) (EX6/EX8/EX9)
wire (flat type) (21 core)
(CN602) (EX6T/EX8T/EX9T)

(+BVTP 3 u10)

7 tape mechanism deck

0 lug

5 CN501 (8P)

8 wire (flat type) (25 core)

(CN902)

3 two screws
(

+BVTP 3 u6

)

7 wire (flat type) (13 core)
(CN302)

state of opening the CD tray

lever

2 Pull the tray by hand.

6 wire (flat type) (11 core)

(CN011)

Turn a gear by a driver

3 loading panel

qs front panel section

gear

qa three screws
(+BVTT 3 u8)

1

till a lever rises up to the
position of the figure.

8

2-5. MAIN BOARD

EX6/EX6T

q; MAIN board

3 wire (flat type) (19 core)

(CN603) (EX6)
wire (flat type) (21 core)
(CN602) (EX6T)

8 two screws
(transistor)

9 screw
(+BVTP 3 u10)

7 screw
(+BVTP 3 u10)

4 wire (flat type) (9 core)
(CN604)

5 CN609 (3P)

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

2 CN701 (3P)

1 CN012 (10P)

6 two screws

(+BVTP 3 u10)

EX8/EX8T

qa screw
(+BVTP 3 u10)

9 screw
(+BVTP 3 u10)

qs MAIN board

5 wire (flat type) (19 core)

(CN603) (EX8)
wire (flat type) (21 core)
(CN602) (EX8T)

6 wire (flat type) (9 core)
(CN604)

EX9/EX9T

qa screw
(+BVTP 3 u10)

9 screw
(+BVTP 3 u10)

qs MAIN board

0 two screws

(transistor)

7 CN609 (3P)

0 four screws

(transistor)

4 CN701 (3P)

1 screw

(+BVTP 3 u10)

2 HOLD board

4 CN701 (3P)

1 screw

(+BVTP 3 u10)

2 HOLD board

8 four screws

(+BVTP 3 u10)

3 CN012 (10P)

8 six screws

(+BVTP 3 u10)

5 wire (flat type) (19 core)
(CN603) (EX9)
wire (flat type) (21 core)
(CN602) (EX9T)

6 wire (flat type) (9 core)
(CN604)

3 CN010 (13P)

7 CN609 (3P)

9

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

2-6. BACK PANEL SECTION

EX6/EX6T

1 CN701 (3P)

3 two screws

(+BVTP 3 u10)

2 Cut the clamp.

4 six screws

(+BVTP 3 u10)

5 back panel section

Installation of the power cord
when assembling the set.

EX8/EX8T

1 screw
(+BVTP 3 u10)

EX9/EX9T

1 screw
(+BVTP 3 u10)

3 CN701 (3P)

3 CN701 (3P)

2 HOLD board

2 HOLD board

5 four screws

(+BVTP 3 u10)

4 Cut the clamp.

6 six screws

(+BVTP 3 u10)

7 back panel section

5 six screws

(+BVTP 3 u10)

4 Cut the clamp.

Installation of the power cord
when assembling the set.

Installation of the power cord
when assembling the set.

10

6 six screws
(+BVTP 3 u10)

7 back panel section

2-7. CD MECHANISM SECTION

4 CD mechanism section

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

3

2-8. BELT (DLM3A)

1 two screws

1 two screws

(+BVTP 3 u10)

2 two screws
(+BVTP 3 u10)

2 two screws

3 cover

4 belt (DLM3A)

5 belt (DLM3A)

11

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

2-9. BASE UNIT

1 wire (flat type) (25 core)
(CN403)

8 insulator

2 two floating

(+PTPWH M2.6)

screw

4 two floating
(+PTPWH M2.6)

5 two coil springs
(insulator)

screw

9 insulator

0 insulator

6

CD mechanism block
(bottom view)

3 two coil springs
(insulator)

7 insulator

qa base unit

2-10. BD74 BOARD

OP base assy

1 wire (flat type) (16 core)
(CN201)

3 BD74 board

2 Remove the four solders.

12

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

SECTION 3

TEST MODE

COLD RESET

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

Procedure:

1. In the standby status, press the [

] button to turn the power

?/1

on.

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

] simultane-

?/1

ously.

3. When “RESET” appears, the set enters standby status.

PANEL TEST MODE
Enter The Panel Test Mode
Procedure:

1. In the standby status, press the [

] button to turn the power

?/1

on.

2. Press three buttons of [DISPLAY], [x] and [OPTIONS] simul­taneously.

3. When the panel test mode is activated, all LEDs and segments
of the liquid crystal display panel are all turned on.

Version Check
Procedure:

1. In the panel test mode (all LEDs and segments of the liquid
crystal display panel are turned on), press the [FUNCTION]
button.

2. On the liquid crystal display panel, date and version are dis­played “xxxxVxxx”.

3. From this status, press the [u] button, and the destination and
model name are displayed.

4. To release from this mode, press three buttons of [DISPLAY],
[x] and [OPTIONS] simultaneously.

Key Test Mode
Procedure:

1. In the panel test mode (all LEDs and segments of the liquid
crystal display panel are turned on), press the [x] button.

2. The message “KEY0 0 0” displayed. Whenever any buttons
are pressed and the [VOLUME] control is turned, the value is
changed.

3. To release from this mode, press three buttons of [DISPLAY],
[x] and [OPTIONS] simultaneously.

CD REPEAT 5 LIMIT CANCEL MODE

Number of repeats for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode enables CD to repeat playback for
limitless times.

Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Press the [FUNCTION] button to select CD function.

3. Press three buttons of [DISPLAY], [x] and [TUNING + M

] simultaneously.

L

4. It enters the CD repeat 5 limit cancel mode and displays “NO
LIMIT”.

5. To release this mode, press the [

] button to turn the power

?/1

off.

CD TRAY LOCK

This mode is for the antitheft of CD disc in shop. (not for transport)

Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Press the [FUNCTION] button to select CD function.

3. Insert a disc.

4. While pressing the [x] button, press the [Z] button for more 5
seconds.

5. The message “LOCKED” is displayed and the disc tray is
locked. (Even if releasing from this mode, the disc tray is still
locked)

6. If press the [Z] button to eject the disc, the message “LOCKED”
is displayed and can not eject the disc.

7. To release this lock, while pressing the [

] button for 5 seconds again.

[

Z

] button, press the

x

8. The message “UNLOCKED” is displayed and the disc tray is
unlocked.

CD POWER MANAGE

This mode is for switch the CD power supply on/off. Even if this
state pulls out AC plug, it is held.

Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Press the [FUNCTION] button to select CD function.

3. Press the [

] button again to turn the power off (standby).

?/1

4. After pressing the [DISPLAY] button, while pressing the [x]
button, press the [

?/1

] button.

5. It turns power on and display “CD/USB”, then display “PWR
ON” or “PWR OFF”.

CHANGE-OVER THE AM TUNING INTERVAL

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

Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Press the [FUNCTION] button to select TUNER AM function.

3. Press the [

] button again to turn the power off (standby).

?/1

4. After pressing the [DISPLAY] button, while pressing the
[TUNING + M L] button, press the [

?/1

] button.

5. It turns power on and display “9k STEP” or “10k STEP”, and
thus the tuning interval is changed over.

CD SHIP MODE

This mode can run the CD sled motor optionally. Use this mode,
for instance, when cleaning the optical pick-up.

Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Confi rm there is no disc in all trays.

3. Press the [FUNCTION] button to select CD function.

4. Press two buttons of [u] and [

] simultaneously.

?/1

5. Set to the CD ship mode (chucking on).

6. After blink “STANDBY”, “LOCK” is displayed, disconnect
the AC plug.

CD SHIP AND COLD RESET
Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Confi rm there is no disc in all trays.

3. Press the [FUNCTION] button to select CD function.

4. Press three buttons of [CD], [– TUNING l m] and [

?/1

simultaneously.

5. After blink “STANDBY”, “RESET” is displayed, disconnect
the AC plug.

]

13

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

CD SERVO TEST MODE

This mode can check the servo system operations of the optical
pick-up system (= optical unit + BD74 board).

Note 1: Do not enter the this mode while any other test mode is in prog-

ress.

Note 2: Do not enter any other test mode while the this mode is in prog-

ress.

How to Enter the CD Servo Test Mode
Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Press the [FUNCTION] button to select CD function.

3. Press three buttons of [u], [TUNING + M L] and [

?/1

simultaneously.

4. It enters the CD servo test mode and displays “xx xxxx”.

How to Exit from the CD Servo Test Mode
Procedure:

1. Press three buttons of [u], [TUNING + M L] and [

?/1

simultaneously.

2. It releases from the CD Servo Test Mode and returns to the
ordinary CD function.

Key Operation:

[TUNING + M L], [– TUNING l m]:
Use these keys to move the cursor to the right digit

or to the left digit in the six-digit number, when
changing the numeric value.

Press [TUNING + M L] to move the cursor to

the right, and press [– TUNING l m] to return
the cursor to the left.

CD SERVICE MODE

This mode can move the SLED of the optical pick-up, and also can
turn the optical pick-up laser power on and off.

Procedure:

1. Press the [

2. Press three buttons of [u], [ENTER] and [

] button to turn the power on.

?/1

] simultane-

?/1

ously.

3. Press the [FUNCTION] button to select CD function.

4. It enters the CD service mode and displays “SERVICE”.

5. To release from this mode, press three buttons of [u], [EN­TER] and [

] simultaneously.

?/1

Key Operation:

[TUNING + M L], [– TUNING l m]:
Use these keys to move the SLED. When [TUN-

ING + M L] is pressed in this mode, the SLED
moves to outer circumference and the message
“SLED OUT” is displayed.

When [– TUNING

l m

] is pressed in this
mode, the SLED moves to inner circumference and
the message “SLED IN” is displayed.

[CD]:
Use this key to turn the optical pick-up laser power

on and off. When the laser power is turned on, the
message “LD ON” is displayed. When the laser
power is turned off, the message “LD OFF” is dis­played.

CD FACTORY MODE

Note 1: Do not enter the this mode while any other testmode is in prog-

ress.

Note 2: Do not enter any other test mode while the this mode is in prog-

ress.

Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Press the [FUNCTION] button to select CD function

3. Press three buttons of [u], [USB] and [

] simultaneously.

?/1

4. It enters the CD factory mode and the message “FACTORY”
is displayed. When the [CD] button is pressed four times, the

]

following message (initial display) is displayed.

– – ON S

S character mode setting

]

Key Operation:

[CD]:
The display changes in the following order when-

[DSGX]:
RF gain setting changes whenever the button is

“-- --”: No gain fi xation.
“AL”: Fix to the gain for AL disc.
“RW”: Fix to the gain for RW disc.

[USB]:
Tracking servo setting changes whenever the but-

“ON”: Tracking servo ON.
“OFF”: Tracking servo OFF.

[FUNCTION]:
S character mode setting changes whenever the but-

“ ”: S character mode OFF.
“S”: S character mode ON.

5. To release from this mode, press three buttons of [u], [USB]
and [

?/1

Tracking servo setting
RF gain setting

ever the button is pressed.

(Initial display)

FSCAG ** (**: Focus AGC value)

TRKAG ** (**: Track AGC value)

RF_AG ** (**: RF AGC value)

pressed.

ton is pressed.

ton is pressed.

] simultaneously.

14

SECTION 4

MECHANICAL ADJUSTMENTS

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

SECTION 5

ELECTRICAL ADJUSTMENTS

HCD-EX6T/EX8T/EX9T only:
Precaution

1. Clean the following parts with a denatured-alcohol-moistened
swab:

record/playback head pinch roller
erase head rubber belts
capstan idlers

2. Demagnetize the record/playback head with a head demag­netizer. (Do not bring the head magnetizer close to the erase
head.)

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the
parts adjusted.

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

Torque Measurement

Mode Torque meter Meter reading

FWD CQ-102AS

FWD
Back tension

FF CQ-201AS

REV CQ-201B

CQ-102C

2.0 – 8.0 mN • m
(20 to 80 g • cm)

(0.28 – 1.12 oz • inch)

0.15 – 0.6 mN • m
(1.5 to 6 g • cm)

(0.021 – 0.083 oz • inch)

5 – 17.7 mN • m

(50 to 177 g • cm)

(0.7 – 2.48 oz • inch)

5 – 17.7 mN • m

(50 to 177 g • cm)

(0.7 – 2.48 oz • inch)

Tape Tension Measurement

Mode Tension meter Meter reading

FWD CQ-403A

more than 80 g

(more than 2.82 oz)

DECK SECTION

0 dB = 0.775V

HCD-EX6T/EX8T/EX9T only:

1. Demagnetize the record/playback head with a head demagne­tizer.

2. Do not use a magnetized screwdriver for the adjustments.

TEST TAPE

Tape Signal Used for

P-4-A063 6.3 kHz, –10 dB Azimuth Adjustment

RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT

Adjustment Location: Record/Playback Head (See page 16)

Note: Perform this adjustments for both decks.

Procedure:

1. Mode: Playback

test tape
P-4-A063
(6.3 kHz, –10 dB)

USB-JACK board
PHONES jack
(J551)

set

level meter

+

–

2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1 dB of peak.

Output
level

within
1 dB

within
1 dB

L-CH
peak

R-CH

Screw
position

peak

L-CH
peak

R-CH
peak

Screw
position

3. Mode: Playback

test tape
P-4-A063
(6.3 kHz, –10 dB)

in phase 45º 90º 135º 180º

USB-JACK board
PHONES jack
(J551)

set

waveform of oscilloscope

good wrong

oscilloscope

H

V

4. After the adjustments, apply suitable locking compound to the
pats adjusted.

15

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

Adjustment Location: Record/Playback Head

CD SECTION

Note:

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

2. Use YEDS-18 disc (Part No. 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 specifi ed value with the following checks.

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

FOCUS BIAS CHECK

oscilloscope

(DC range)

BD74 board

CL102 (RFOUT)

CL117 (VREF)

Procedure:

1. Connect the oscilloscope to CL102 (RFOUT) and CL117
(VREF) on the BD74 board.

2. Press the [

] button to turn the power on, and press the

?/1

[FUNCTION] button to select CD function.

3. Set disc (YEDS-18) and press the [u] button to playback.

4. Confi rm that oscilloscope waveform is as shown in the fi gure
below (eye pattern).

A good eye pattern means that the diamond shape (◊) in the

center of the waveform can be clearly distinguished.

+
–

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

Checking Location:
– BD74 Board (Side B) –

CL117

(VREF)

CL102

(RFOUT)

IC101

level:

1.1 ± 0.4 Vp-p

IC301

16

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

TUNER SECTION

FM AUTO STOP CHECK

set

0 dB = 1 μV

signal

generator

+

75 :

–

Procedure:

1. Turn the power on.

2. Input the following signal from Signal Generator to FM an­tenna input directly.

Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)

Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You

cannot use video cable for checking.

Please use SG whose output impedance is 75 ohm.

3. Set to FM tuner function and scan the input FM signal with
automatic scanning.

4. Confi rm that input Frequency of A, B and C detected and auto-
matic scanning stops.

The stop of automatic scanning means “The station signal is re­ceived in good condition”.

17

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

SECTION 6

• Circuit Boards Location

DIAGRAMS

REG board

PANEL board

USB board

DECK board
(HCD-EX6T/EX8T/EX9T)

USB-JACK board

MAIN board

PT-POWER board

BD74 board

18

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)

For Printed Wiring Boards.

Note:

• X : Parts extracted from the component side.

• Y : Parts extracted from the conductor side.

• W : Indicates side identifi ed with part number.

• : Pattern from the side which enables seeing.

(The other layers’ patterns are not indicated.)

Caution:

Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)

• Abbreviation

AR : Argentina model
E2 : 120V AC area in E model
E4 : 220 – 240V AC area in E model
E51 : Chilean and Peruvian models
MX : Mexican model

Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.

For Schematic Diagrams.

Note:

• All capacitors are in μF unless otherwise noted. (p: pF) 50

WV or less are not indicated except for electrolytics and
tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specifi ed.

• f : Internal component.

• 2 : Nonfl ammable resistor.

• C : Panel designation.

Note: The components identifi ed by mark 0 or dotted

line with mark 0 are critical for safety.

Replace only with part number specifi ed.

• A : B+ Line.

• B : B– Line.

• H : Adjustment for repair.

• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.

– BD74 Board –

no mark : CD PLAY

– Other Boards –

no mark : TUNER (FM/AM)

( ) : CD PLAY
< > : TAPE PLAY
[ ] : TAPE REC
* : Impossible to measure

• Voltages are taken with VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal production

tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production

tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : TUNER (FM)
f : TUNER (AM)
J : CD
E : USB
q : PC IN
d : TAPE PLAY
: TAPE REC

• Abbreviation

AR : Argentina model
E2 : 120V AC area in E model
E4 : 220 – 240V AC area in E model
E51 : Chilean and Peruvian models
MX : Mexican model

19

HCD-EX6/EX6T/EX8/EX8T/EX9/EX9T

• Waveforms

– BD74 Board –

1 IC101 2 (RFOUT)

(CD play mode)

200 mV/DIV, 500 nsec/DIV

2 IC101 us (XOUT)

16.934 MHz

1 V/DIV, 20 nsec/DIV

0.7 to 1.5 Vp-p

2.8 Vp-p

– PANEL Board –

1 IC301 qf (X1A)

32.768 kHz

1 V/DIV, 10 Psec/DIV

2 IC301 os (X1)

6 MHz

1 V/DIV, 100 nsec/DIV

3.2 Vp-p

2.8 Vp-p

– USB Board – – MAIN-AMP Board –

1 IC901 7 (CF2)

12 MHz

1 V/DIV, 20 nsec/DIV

2.8 Vp-p

1 IC801 qh (CLK IN)

32.768 kHz

200 mV/DIV, 5 Psec/DIV

0.15 Vp-p

20