Sony HCD GX450 Service Manual Ver 1.3

HCD-GX450

SERVICE MANUAL

Ver. 1.3 2006.10

• HCD-GX450 is the tuner, deck, CD and
amplifier section in MHC-GX450.

CD
Section

Tape deck Model Name Using Similar Mechanism New New
Section T ape Transport Mechanism Type CWM43FF-05 CWM43FF-05

Model Name Using Similar Mechanism New New
CD Mechanism Type CDM74-F1BD81
Optical Pick-up Name

US Model

Canadian Model

Former Type Models

KSM-215DCP/C2NP KSM-213DCP/C2NP

New Type Models

CDM74KF-K6BD81C

Amplifier section
AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:

With 6 ohm loads, both channels driven, from
120 – 10,000 Hz: rat ed 125 watts per ch annel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 mil liwatts to
rated output.

Front speaker
Continuous RMS power output (reference):

125 + 125 watts (6 ohms at
1 kHz, 10% THD)

Total harmonic distortion less than 0.07% (6 ohms at

1kHz, 60 W)
Sub woofer
Continuous RMS power output (reference):

150 watts (6 ohms at

50 Hz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at

50 Hz, 75 W)

CD player section

System Compact disc and dig ital

audio system

SPECIFICATIONS

Laser Semiconductor laser

(λ=780 nm)
Emission duration:

continuous

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

Tape deck section

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

using Sony TYPE I
cassettes

Tuner section

FM stereo, FM/AM super he ter odyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz

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

AM tuner section

Tuning range 530 – 1,710 kHz

(with the tuning interv al
set at 10 kHz)
531 – 1,710 kHz
(with the tuning interv al
set at 9 kHz)

Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz

General

Power req uirements 120 V AC, 60 Hz
Power consumption
USA models: 265 watts
Canadian models: 330 VA
Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/CD section:

Approx. 280 × 327 ×
425 mm

Mass Approx. 10.0 kg

Design and specifications are subject to change
without notice.

9-877-534-04

2006J16-1
© 2006.10

MINI HI-FI COMPONENT SYSTEM

Sony Corporation

Home Audio Division
Published by Sony Techno Create Corporation

HCD-GX450

SAFETY CHECK-OUT

After correcting the original service problem, perform the
following safety checks 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

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 v oltmeter. The “limit” indication
is 0.75 V, so analog meters must hav e an accurate lo w-v oltage
scale. The Simpson 250 and Sanwa SH-63Trd are e xamples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)

To Exposed Metal

Parts on Set

AC

0.15 µF

1.5 kΩ

Earth Ground

Voltmeter
(0.75 V)

The release method of a CD disc tray LOCK function

There is a disc lock function for the disc theft prevention for a
demonstration at a shop front in this machine.
Procedue:

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

2. Press two buttons of x and Z (EJECT) simultaneously for
five seconds.

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

4. Press two buttons of x and Z (EJECT) simultaneously for
five seconds again.

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

6. To exit from this mode, press the ?/1 button to turn the set
off.

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 flow) 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.

Fig. A. Using an A C v oltmeter to check A C 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 .

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

À LA SÉCURITÉ!

2

HCD-GX450

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 pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.

TABLE OF CONTENTS

1. SERVICING NOTE·························································· 4

2. GENERAL ·········································································· 6

3. DISASSEMBLY

3-1. Cover (Top) ····································································· 9
3-2. CD Door·········································································· 9
3-3. Front Panel Section ······················································· 10
3-4. CD Mechanism Deck (CDM74-F1BD81) ···················· 10
3-5. Tape Mechanism Deck, Game Jack Board ··················· 11
3-6. PANEL Board ······························································· 11
3-7. Back Panel Section, SUB-TRANS Board ···················· 12
3-8. Power Transformer·······················································12
3-9. MAIN Board ································································· 13
3-10. SUB-WOOFER Board················································ 13
3-11. AMP Board ································································· 14
3-12. BD81A Board ····························································· 14
3-13. CONNECT Board·······················································15
3-14. DRIVER Board, SW Board ········································ 15
3-15. Optical Pick-up (KSM-215DCP/C2NP) ····················· 16
3-16. SENSOR Board ·························································· 16
3-17. MOTOR (TB) Board··················································· 17
3-18. MOTOR (LD) Board ·················································· 17

4. TEST MODE ···································································· 18

This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.

CAUTION

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

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.

5. DIAGRAMS

5-1. Block Diagrams – PANEL Section – ···························· 22

– MAIN Section – ······················································· 23
– BD/DRIVER Section – ············································ 24

– SUB-WOOFER Section – ········································ 25
5-2. Printed Wiring Board – BD81A Section –··················· 26
5-3. Schematic Diagram – BD81A Section – ····················· 27
5-4. Printed Wiring Board

– CD MECHANISM Section – ··································· 28
5-5. Schematic Diagram – CD MECHANISM Section –···29
5-6. Printed Wiring Board – MAIN Section – ···················· 30
5-7. Schematic Diagram – MAIN Section (1/2) – ·············· 31
5-8. Schematic Diagram – MAIN Section (2/2) – ·············· 32
5-9. Printed Wiring Board – PANEL COMB Section –······ 33
5-10. Schematic Diagram – PANEL COMB Section – ······34
5-11. Printed Wiring Board – SUB-WOOFER Section – ··· 35
5-12. Schematic Diagram

– SUB-WOOFER Section – ········································ 36
5-13. Printed Wiring Board – PANEL Section –················· 37
5-14. Schematic Diagram – PANEL Section (1/2) – ··········38
5-15. Schematic Diagram – PANEL Section (2/2) – ··········39
5-16. Printed Wiring Board – TRANS Section – ················ 40
5-17. Printed Wiring Board – AMP Section –····················· 41
5-18. Schematic Diagram – AMP POWER Section – ········42
5-19. IC Pin Function Description ······································· 46

6. EXPLODED VIEWS

6-1. MAIN Section·······························································51
6-2. Front Panel Section ······················································· 52
6-3. MAIN Board Section ···················································· 53
6-4. CD Mechanism Deck Section -1 (CDM74-F1BD81)··· 54
6-5. CD Mechanism Deck Section -2 (CDM74-F1BD81)··· 55

7. ELECTRICAL PARTS LIST ······································· 56

3

HCD-GX450

d

• SERVICE POSITION -1 (AMP BOARD)

To inspect the AMP board, turn both of the front panel
and the CD mechanism deck so that the left side of the product faces down.

CD mechanism deck

SECTION 1

SERVICING NOTE

front panel

AMP boar

4

• SERVICE POSITION -2 (BD81A BOARD)

k

Remove the CD mechanism deck and place it on top of the pedestal as shown.
Inspect the BD81A bard in this set up.

HCD-GX450

BD81A board

CD mechanism dec

5

HCD-GX450

Illustrati

SECTION 2

GENERAL

List of button locations and reference pages

How to use this page

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

Main unit

ALPHABETICAL ORDER

A – O P – Z

ALBUM +
ALBUM –
CD eg (9, 11, 14, 19, 20)
CD SYNC wj (19)
Deck A wk (18)
Deck B qj (18, 19, 20, 24)
DISC 1 – 3 q; (12, 14, 35)
DISC SKIP/EX-CHANGE qs

Disc tray 9 (11)
DISPLAY 2 (17, 27, 28)
Display window 5
EFFECT ON/OFF 8 (22)
ENTER qa (14, 15 , 22)
EQ BAND 7 (22)
GAME es (20, 23, 30)
GAME INPUT AUDIO L/R jacks

GAME INPUT VIDEO jack wf

GAME MIXING wh (23)
GROOVE 8 (21)
ILLUMINATION
Operation Dial

qh (12, 14, 19)

wg (12, 14, 19)

(11, 12, 14, 19)

wd (20, 29)

(29)

3 (28)

(– EQ +/l L) 6 (12,
14, 19, 22)

P FILE qd (22)
PHONES jack ql
PLAY MODE wl (12, 14, 18, 19,

20, 35)
Power illuminator qk (28)
PRESET EQ qd (22)
REC PAUSE/START wj (19, 20,

23, 24)
Remote sensor 4
SURROUND 8 (23)
TAPE A/B ed (18, 19, 20, 24)
TUNER/BAND ef (15, 16, 20)
TUNING MODE wl (15, 16, 35)
TUNING + qh (15, 16)
TUNING – wg (15, 16)
VOLUME control w; (21)

12345 6 78 9

eg
ef
ed
es

e;
wl
wk
wj

on number

r

TAPE A/B ed (18, 19 , 2 0, 24)

Name of button/pa rt Reference page

RR

BUTTON DESCRIPTIONS

?/1 (power) 1 (8, 16, 27, 30, 33,

35)

X (pause) wg (12, 19)
Z (eject) qf (11)
PUSH Z (deck B) (eject) qg (18)
x (stop) wg (12, 19, 24, 35)
M (fast forward) qh (12, 19)
H (play) qh (12, 18, 19)
m (rewind) wg (12, 19)
Z PUSH (deck A) (eject) e; (18)

q;

qa

j

ALBUM

S

s

TUNING TUNING

J

ALBUM

H

h

qs
qd
qf
qg
qh
qj
qk

ql

6

wh

wfwg

wd

w;

HCD-GX450

Remote control

ALPHABETICAL ORDER

A – E

ALBUM – qd (12, 14)
ALBUM + qa (12, 14)
CD qk (11, 14)
CLEAR qg (14)
CLOCK/TIMER SELECT 2

(26, 27)

CLOCK/TIMER SET 3 (10, 25,

26)
DISC SKIP q; (12, 14)
DISPLAY wa (17, 27, 28)
ENTER 9 (10, 14, 15, 25, 26)
EQ qf (22)

F – Z

FM MODE 4 (17)
FUNCTION 6 (11, 14, 15, 16)
PLAY MODE w; (12, 14, 18)
REPEAT 4 (13)
SLEEP ws (25)
TAPE qj
TUNER BAND 5 (15, 16)
TUNER MEMORY ql (15)
TUNING MODE w; (15, 16)
VOLUME +/– qs (21, 25)

BUTTON DESCRIPTIONS

?/1 (power) 1 (8, 26)
m/M (rewind/fast forward)

7 (12, 19)
–/+ (tuning) qh (15)
./> (go back/go forward)

qh (10, 12, 19)

N (play) 8 (12, 18)
X (pause) 8 (12, 19)
x (stop) 8 (12, 19)

Setting the clock

Use buttons on the remote for the operation.

1

Press ?/1 to turn on the system.

2

Press CLOCK/TIMER SET.

3

Press . or > repeatedly to set the
hour.

4

Press ENTER.

5

Press . or > repeatedly to set the
minute.

6

Press ENTER.

The clock starts working.

To adjust the clock

1

Press CLOCK/TIMER SE T.

2

Press . or > repeatedly to select
“CLOCK SET”, then press ENTER.

3

Do the same procedures as step 3 to 6
above.

Notes

The clock settings are canceled when you disconnect

the power cord or if a power failure occurs.

ws
wa
w;
ql
qk
qj

qh

qg
qf

qd

1
2
3
4
5
6

7
8

9
q;

qa
qs

7

HCD-GX450

Note: Disassemble the unit in the order as shown below.

SET

3-1.COVER (TOP)

(Page 9)

3-2.CD DOOR

(Page 9)

SECTION 3

DISASSEMBLY

3-3.FRONT PANEL SECTION

(Page 10)

3-4.CD MECHANISM DECK

(CDM74-F1BD81)

(Page 10)

3-12.BD81A BOARD

(Page 14)

3-7.BACK PANEL SECTION,

SUB-TRANS BOARD

(Page 12)

3-8.POWER TRANSFORMER

(Page 12)

3-5.TAPE MECHANISM DECK,

GAME JACK BOARD

(Page 11)

3-13.CONNECT BOARD

(Page 15)

3-14.DRIVER BOARD,

SW BOARD

(Page 15)

3-9.MAIN BOARD

(Page 13)

3-10.SUB-WOOFER BOARD

3-6.PANEL BOARD

(Page 11)

3-15.OPTICAL PICK-UP

(KSM-215DCP/C2NP)

(Page 16)

(Page 13)

3-16.SENSOR BOARD

(Page 16)

3-17.MOTOR (TB) BOARD

(Page 17)

3-18.MOTOR (LD) BOARD

(Page 17)

3-11.AMP BOARD

(Page 14)

8

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

3-1. COVER (TOP)

qs

qf

cover

(top)

6

two screws (Case 3 TP2)

cover

(Side-L)

qa

two

screws (+BVTP 3

×

HCD-GX450

10)

7

screw (case 3 TP2)

3-2. CD DOOR

9

screw

(+BVTP 3

× 10

)

8

screw

(+BVTP 3

q;

× 10

qs

)

qd

cover

(Side-R)

5

3

3

two claws

(+BVTP 3

1

two screws

(case 3 TP2)

4

(+BVTP 3

2

screw (Case 3 TP2)

screw

screw

× 10

× 10

)

)

CD mechanism deck (CDM74)

1

Turn the pulley to the direction of arrow.

Front panel side

pulley

2

Pull-out the disc tray.

4

CD door

9

HCD-GX450

)

3-3. FRONT PANEL SECTION

0

connector 3p (CN304C)

8

wire (flat type) 17 core (CN253)

6

connector 2p (CN805)

3

screw (+BVTP 3

×

10)

4

screw (+BVTP 3

× 8

)

5

screw (+BVTP 3

× 8

)

qd

front panel section

3-4. CD MECHANISM DECK (CDM74-F1BD81)

2

screw (+BVTP 3

qs

connector 8p (CN103)

9

connector 5p (CN309)

7

wire (flat type) 29 core (CN302)

1

three screws (+BVTP 3

qa

connector 3p (CN102B)

× 8

)

1

three

×

10)

screws (+BVTP 3

×

10

10

4

CD mechanism deck (CDM74-F1BD81)

3

connector 9p (CN254)

2

connector 12p (CN701)

3-5. TAPE MECHANISM DECK, GAME JACK BOARD

)

)

1

wire (flat type) 13 core (CN602)

3

tape mechanism deck

HCD-GX450

2

six

screws

(+BVTP 2.6

×

8

3-6. PANEL BOARD

2

seven

claws

5

GAME JACK board

4

two

(+BVTP 2.6

3

connector 6p (CN604)

screws

×

8)

4

connector 5p (CN605)

5

PANEL board

1

ten

screws

×

(+BVTP 2.6

8

11

HCD-GX450

)

r

3-7. BACK PANEL SECTION, SUB-TRANS BOARD

7

8

SUB-TRANS board

6

(+BVTT 3

1

connector

2p (CN904)

two

screws

× 10

)

connector

2p (CN901)

3

connector

3p (CN308)

9

back panel section

5

(+BVTT 3

three

screws

×

10)

4

two

screws

(+BVTP 3

×

10

3-8. POWER TRANSFORMER

1

connector

3p (CN905)

2

wire (flat type) 11 core (CN101)

5

four

screws

(+ITC 4

× 8

)

6

power transforme

3

screw

(+BVIT 3

× 8R

)

12

2

connector

10p (CN907)

4

earth wire

3-9. MAIN BOARD

d

d

1

connector

10p (CN907)

2

connector

4p (CN501)

5

MAIN

Main board

HCD-GX450

boar

3-10. SUB-WOOFER BOARD

2

two

(transistor)

screws

4

13p (CN441)

3

two

(+BVTP 3

1

connector

7p (CN502)

3

two

(+BVTP 3

connector

screws

× 8

)

screws

× 8

)

4

SUB-WOOFER boar

13

HCD-GX450

)

)

3-11. AMP BOARD

3

two

screws

(+BVIT 3

4

two

screws

(transistor)

× 8R

)

6

AMP

2

screw

(+BVTP 3

board

×

14)

1

two

screws

(+BVTP 3

5

heat sink

× 8

3-12. BD81A BOARD

4

Remove soldering from the four points.

1

wire (flat type) 27 core (CN202)

3

screw

(+BVTP 2.6

5

BD81A

board

× 8

)

2

wire (flat type) 16 core (CN101

14

3-13. CONNECT BOARD

2

two

(+BVTP 2.6

3

CONNECT

screws

board

1

wire (flat type) 27 core (CN251)

× 8

)

HCD-GX450

3-14. DRIVER BOARD, SW BOARD

1

(+BTTP (M2.6))

4

DRIVER

2

wire (flat type) 5p (CN702)

two

screws

board

3

connector

4p (CN703)

5

screw

(+BTTP (M2.6))

6

SW board

15

HCD-GX450

3-15. OPTICAL PICK-UP (KSM-215DCP/C2NP)

2

h

qh

optical pick-up

(KSM-215DCP/C2NP)

0

two

insulators

9

two

coil springs

(insulator)

8

t

wo stoppers (BU)

older (213) ASSY

qa

1

floating

(+PTPWH M2.6)

6

two

insulators

5

two

coil springs

(insulator)

3

screw

(BVTT M2.6)

4

floating

(+PTPWH M2.6)

screw

screw

3-16. SENSOR BOARD

2

t

ray

7

(BVTT M2.6)

qd

Remove the four solderings of motor.

1

floating

(+PTPWH M2.6)

6

floating

(+PTPWH M2.6)

screw

8

s

(+BTTP (M2.6))

screw

t

wo screws

crew

0

SENSOR board

9

connector

(

CN731)

qf

CN101 (flat type)

qg

B

D81A board

qs

s

crew (+BVTP 2.6x 8)

3

b

elt (table)

4

floating

(+PTPWH M2.6)

5

screw

p

ulley (table)

16

7

g

ear (geneva)

3-17. MOTOR (TB) BOARD

2

stopper

4

1

stopper

5

t

able motor assy (M741)

HCD-GX450

3-18. MOTOR (LD) BOARD

4

Remove the two solderings of motor.

5

l

oading motor assy (M751)

3

7

MOTOR (TB) board

6

Remove the two solderings of motor.

5

two

screws

(+BTTP (M2.6))

2

two

screws

(+BTTP (M2.6))

3

MOTOR (LD) board

wire (flat type) 5 core (CN742)

1

b

elt (loading)

17

HCD-GX450

SECTION 4

TEST MODE

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

•A step of AM channels can be changed ov er 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 “AM”.

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

4. Press PLAY MODE/TUNING MODE and ?/1 buttons si-

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

[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 , PLAY MODE/TUNING MODE ,

and DISC 1 simultaneously.

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

the set is reset.

[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 is displayed status.

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

1. Operating method of Aging Mode

Press ?/1 button to turn the set ON and select “CD” of the function.

1) Set three discs in tray . Press the

PLA Y MODE/TUNING MODE
button to set the “ALL DISCS” mode, and the PRESET EQ
button to “REPEAT” off.

2) Load the tapes recording use into both decks.

3) Press three buttons x , PLAY MODE/TUNING MODE ,
and EX-CHANGE simultaneously.

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

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

2. Aging mode in CD section

1) Operation during aging mode

• In the agining mode ,the program is excuted in the following

sequence.
(1) The disc tray opens and closes.
(2) The disc tray turns to select a disc 3.
(3) The pick-up accesses to the first track, and plays 3 seconds.
(4) The pick-up accesses to the last track, and plays 3 seconds.
(5) The disc tray opens and closes.
(6) The disc tray turns to select a disc 1.
(7) The same operation starts like step (3).
(8) After a disc 1 aging operation, a disc 2 is selected.
(9) When an aging operation of a disc 3 is completed, the display

“AGING ∗∗∗∗” value increases.

(10) If no error occurs, the aging operation continues repeatedly.

2) Error display

Disc error

Display Error

E00D01022 Focus error (No disc)
E00D02022 Sub Q error (Focus is good)
E00D02023 TOC reading error
E00D02014 Access error (Unable within regular time)

Mechanism error

Display Error

E00M__E_0 Error during opening tray
E00M__C_2 EX-CHANGE disc error
E00M__D_0 Error during closing tray
E00M__F_3 EX-OPEN error
E00M__D_5 EX-CLOSE error
E00M__C_2 Chuck-up error
E00M__C_3 Unchucking error

3. Aging mode in Tape Deck section

1) Operation during aging mode

• In the agining mode, the program is excuted in the following
sequence.

Step

1

Rewind the TAPE A

2

Rewind the TAPE B

3

Play the TAPE A (1 minute)

4

Stop the TAPE A (1 second)

5

Play the TAPE A (3 minutes)

6

Rewind(AMS) the TAPE A

7

F.F.(AMS) the TAPE A

8

Play the TAPE B (1 minute)

9

Stop the TAPE B (1 second)

10

Record the TAPE B (3 minutes)

11

Rewind(AMS) the TAPE B

12

F.F.(AMS) the TAPE B

Operation

Display

TAPE AAG-1
TAPE BAG-2
TAPE AAG-2
TAPE AAG-3
TAPE AAG-4
TAPE AAG-5
TAPE AAG-6
TAPE BAG-2
TAPE BAG-3
TAPE BAG-4
TAPE BAG-5
TAPE BAG-6

2) Error display

• If error occurred, the display remains like “TAPE BAG-2”.

4. Exiting from the aging mode

• Be sure to perform Cold Reset to exit from the aging mode.

18

HCD-GX450

[P ANEL T est Mode]

• All fluorecent segments and LEDs are tested.

•Keyboard check.

Procedure:

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

2. To enter the test mode, press the three buttons x , PLAY
MODE/TUNING MODE and ENTER simultaneously.

3. All segments and LEDs (without STANDBY LED) are turned
on.

4. Press X and ENTER buttons simultaneously, and the key
check mode is activated.

5. The message “KEY 0 0 0 ” is displayed.
Each time a button is pressed, the key code number is displayed.

6. Press X and ENTER buttons simultaneously, and the key
count mode is activated.

7. The message “KEYCNT 0” is displayed.
Each time a button is pressed, “KEYCNT 0” value increased.
However, once a button is pressed, it is no longer taken into
account.

8. Press X and ENTER buttons simultaneously, and the head
phone detect mode is activated.

9. The message “H_P OFF” is displayed when a headphone jack
is not inserted.
“H_P ON ” is displayed when a headphone jack is inserted.

10. Press X and ENTER b uttons simultaneously , and the volume
control detect mode is activated.

11. The message “VOLUME FLAT” is displayed.
“VOLUME UP” is displayed if rotating MASTER VOLUME
knob clockwise, or “VOLUME DO WN” is displayed if rotating
counterclockwise.

12. To exit from the GC test mode after the head phone detect mode,
press X and ENTER buttons simultaneously.

[Version and Destination Display Mode]

•The version or destination is displayed.

Procedure:

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

2. To enter the test mode, press the three buttons x , PLAY
MODE/TUNING MODE and DISC 2 simultaneously.

3. The destination is displayed.

4. Press DISPLAY buttons simultaneously.

5. The version is displayed.

6. To exit from this mode, press the three buttons x , PLAY
MODE/TUNING MODE and DISC 2 simultaneously and
press ?/1 button to turn the set OFF.

[CD Service Mode]

•This mode can run the CD sled motor freely. Use this mode, for

instance, when cleaning the pick-up.

Procedure:

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

2. Select the function “CD”.

3. To enter the test mode, press three buttons x , PLAY MODE/
TUNING MODE , and Z simultaneously.

4. The CD service mode is selected.

5. With the CD in stop status, press M button to move the
pick-up to outside track, or press m button to inside track.

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

1) Move the pick-up to the most inside track.

2) Press ?/1 button to turn the set OFF.

Note: • Always move the pick-up 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.

[MC Test Mode]

•This mode is used to test the function of the equalizer.

Procedure:

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

2. To enter the test mode, press the three buttons x , PLAY
MODE/TUNING MODE and DISC 3 simultaneously.

3. Press the EQ + button.
The function of the equalizer is set to “MAX”.

4. Press the EQ - button.
The function of the equalizer is set to “MIN”.

5. Press the PRESET EQ button.
The function of the equalizer is set to “EQ FLAT”.

6. MASTER VOLUME up and down.
“VOLUME MIN” “VOLUME 16” “VOLUME MAX” is
displayed.

7. Press the GROOVE button.
The message “VACS OFF” or “VACS ON” is displayed.

8. To exit from this mode, press ?/1 button to turn the set OFF.

[CD Ship Mode (LOCK) ]

•This mode moves the pick-up to the position durable to vibra-

tion. Use this mode when returning the set to the customer after
repair.

Procedure:

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

2. Select the function “CD”.

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

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

5. The “STANDBY” display blinks instantaneously, the message
“LOCK” is displayed and the CD ship mode is set.

[CD Ship (LOCK) & COLD RESET MODE]

Procedure:

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

2. Select the function “CD”.

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

4. Press three buttons x , CD and DISPLAY simultaneously.

5. The “ST ANDBY” display blinks instantaneously and CD ship

mode is set.

6. To fluorescent indicator tube displays “COLD RESET” and

the set is reset.

[Disc T ray Lock]

Procedure:

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

2. Select the function “CD”.

3. Press two buttons of x and Z simultaneously for five seconds.

4. The message “LOCKED” is displayed and the tray is locked.

(Even if exiting from this mode, the tray is still locked.)

5. Press two buttons of x and Z simultaneously for f ive seconds

again.

6. The message “UNLOCKED” is displayed and the tray is

unlocked.

7. To exit from this mode, press the ?/1 button to turn the set

OFF.

19

HCD-GX450

[CD Repeat 5 Times Limit Release Mode]

Procedure:

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

2. Select the function “CD”.

3. Press three buttons x , CD and ENTER simultaneously.

4. The message “LIMIT OFF” is displayed.

5. Press ?/1 button the set OFF.

[AMP TEST MODE]

Procedure:

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

2. To enter the test mode, press three buttons x , PLAY
MODE/TUNING MODE and ENTER simultaneously.

3. Press the DISPLAY button.
The message “V0 0 0” “ 000” is displayed.

4. Press the GROOVE button.
The message “DBFB ON” “DBFB OFF” is displayed.

5. Press the SURROUND button.
The message “SURROUND ON” “SURROUND OFF” is
displayed.

6. Press the EQ BAND button.
The message “LOW” “MID” “HIGH” is displayed.

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

20

SECTION 5

d

DIAGRAMS

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

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 and waveforms are dc with respect to ground

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

•Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

: 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.

under no-signal (detuned) conditions.
Voltage variations may be noted due to normal produc-

tion tolerances.
no mark : FM
( ): CD STOP

Voltage variations may be noted due to normal produc­tion tolerances.

F : TUNER
E : PB (DECK A)
d : PB (DECK B)
G : REC (DECK B)
J : CD
f : AUDIO

4

W or less unless otherwise

Note:

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

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• b : Pattern from the side which enables seeing.

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

• Indication of transistor.

C

These are omitted.

Q

B

CE

These are omitted.

•Abbreviation
CND : Canadian model

Q

B

HCD-GX450

Circuit Boards Location

SENSOR board

SW board

MOTOR (LD) board

CONNECT board

E

TRANS board

SUB-TRANS board

BD81A board

MOTOR (TB) board

DRIVER board

SUB-WOOFER boar

AMP board

VIDEO OUT board

• Wavef orms
– PANEL BOARD –

1

IC601 qd (I-XT2)

30.5 s
2 V/DIV, 10 s/DIV

2

IC601 qh (CF2)

100 ns

2 V/DIV, 40 ns/DIV

5.2 Vp-p

4.9 Vp-p

REM board

PANEL board

MAIN board

6 STREAM LED board

GAME JACK board

H/P JACK board

2121

HCD-GX450

5-1. BLOCK DIAGRAMS – PANEL SECTION –

IC601(1/2)

SYSTEM CONTROLLER

BD/DRIVER

SECTION

A

SCOR

XTCN
XRST

XL-T-CD

CD-DATA

SENS

CD-CLK

MP3-DO

MP3-DI

MP3-CLK

MP3-CS

MP3-CP
MP3-ACK
MP3-REQ

MP3-RESET

MP3-STB

MASTER VOLUME

CN603

C1
C2
C3
C4
C5
C6
C7
C8

C9
C10
C11
C12
C13
C14
C15
C18

S641-S650

FUNCTION

KEY

S601-S612

FUNCTION

KEY

S621-S630

FUNCTION

KEY

S851

ENCODER

IC610

REMOTE

CONTROL

RECIEVER

C18
C15
C14
C13
C12
C11
C10
C9
C8
C7
C6
C5
C4
C3
C2
C1

X601

32.768kHz

X602

10MHz

25 KEY3

27 KEY1

26 KEY2

9 VOLUME-IN1

10 VOLUME-IN2

283SIRDS-IN

MP3-TTB

80

MP3-RESET

6

MP3--REQ

4

MP3-ACK

3

MP3-CS

2

MP3-CS'

1

MP3-CLK

100

MP3-DI

99

MP3-DO

98

CD-CLK

97

SENS

96

CD-DATA

95

XLT

94

XRES

93

XTCN

92

SCOR

5

12 I-XT1

13 I-XT2

15 CF1

16 CF2

G01-G13

S1-S21

POWER RELAY

Q610

82STREM-LED1

80STREM-LED3

81STREM-LED2

77STREM-LED6

78STREM-LED5

79STREM-LED6

76POWER LED

42
30

43
45
47
50
52
65

74

11RESET

29ACCUT

LED

DRIVER

Q612

LED

DRIVER

Q611

LED

DRIVER

Q614

LED

DRIVER

Q615

LED

DRIVER

Q613

LED

DRIVER

LED601

FLUORESCENT

INDICATOR

Q605

RESET

SWITCH

FL601

TUBE

LED610

LED612

LED611

LED615

LED614

LED613

VF

-VFL

IC604

RESET

+3.5V

+3.5V

+9V

+9V

PT901

POWER TRANSFORMER

VF

D902-905

SUB TRANSFORMER

RY901

AC

IN

PT902

AC3

AC4

IC603

REG

F904

F905

F906

F907

RELAY
DRIVE

15

IC302

REG

12

4

Q301,Q302

SWITCH

IC301

REG

13

-VFL

IC303

REG

13

IC304

REG

13

13

+B

-B

Q902

REG

D401

D301-D304

D902

D305-D308

D309-D312

Q361,Q362,Q314,Q315

+3.3V

2222

– MAIN SECTION –

BD/DRIVER

SECTION

GAME INPUT

VIDEO OUT

B

J804

VIDEO

L

R

J803

VIDEO

DECK-A

LRHP2

HP1

DECK-B

L

HRP2

R

HRP1

HE1

TAPE

MECHANISM DECK

PWDEWC B

MODE B
MODE A

B HALF

A HALF
A-PHOTO
B-PHOTO

COMP

SOLA

CD-L
CD-R

R-CH

R-CH

R-CH

R-CH

TUNER

TUNER-L

TUNER-R

CLK

TUNED

STEREO

TU-MUTE

DO

DI

CE

Q304-Q307

REC SW

9

P/B SW

7

SELECTOR

IC201

CD-MUTE

R-CH

CLK

TUNED

STEREO

CONT

SWITCH

DO

DI

CE

L101

4

DATA

RCLK

Q321
BIAS

OSC

1 CDL

61 TUNER_L

19 SI

18 SO

59 GAME-L

9 TAPEA1

11 TAPEB1

15 REC-OUT1

Q324

Q322,Q323

SWITCH

IC101

SOUND PROCESSOR

+9V

CD-MUTE

FAN
LM-R
LM-F
TM-R
TM-F

BBNF1

BBIN1

BBNF2

SAOUT2

SAOUT1

11 Q5

12 Q6

7Q1

6Q0

10 Q4
17 Q11

13 Q7
14 Q8
15 Q9
16

32VOUT2
33VOUT1

25 5 1SW OUT

34

35

31BBNF2

30

55

56

40ASMOUT

Q308,Q309

Q313

SWITCH

IC371

SP DRIVER

Q601

CAP M

DRIVE

Q602

B TRIG

DRIVE

Q603

A TRIG

DRIVE

R-CH

STK

DATA

CLOCK

LCH

Q106

BUFFER

Q107

BUFFER

Q327

BUFFER

3
4
5Q10

IC102

BUFFER

Q351,Q352

SWITCH

RCLK
DATA

TUNED
STEREO

DI
CE
DO

CLK
LCH

MOTOR

SOLB

SOLA

MUTE

Q101-Q104

IC104

BUFFER

Q105

SWITCH

Q303

DEF

SYSTEM CONTORLLER

24 I-STREEMA/VACS
75 SYSTEM-MUTE
69 ASM

88

CLK

91

DATA

67

TUNED

68

STEREO

83

DI

84

CE

85

DO
CLK

86

LCH

87

23

TAPE B START+

22

TAPE A START+
I-REEL-A

70

I-REEL-B

71

2

MOTOR

3

SOLBSOLB

4

SOLA

+Vcc

IC601(2/2)

HCD-GX450

CN443

GND

OVERLOAD/DC

RY441

+B

RELAY+

RELAY-

FAN

Q310-Q312

FAN

DRIVE

+10V

IC441

POWER AMP

11

Q108

SWITCH

-VFL

TH441

Q371

19WFR/HP/MIC
18PROTECT

INVERTER

4
5

13

Q489

MUTESTK

Q483,Q484

OVERHEAT

R-CH

DET

Q481,Q482

OVERLOAD

DET

Q441,Q442

OVERLOAD

DET

Q485-Q488

RELAY
DRIVE

SWITCH

AC4

Q308,

Q309,Q313

CN306

SW ON/OFF
SW OUT

SW LIMITER

C

SUB-WOOFER

SECTION

CN201

IC602

VIDEO BUFFER

CD NO SENS

CD OPEN/CLOSE

CD ENCORDER

BD/DRIVER

D

SECTION

• R-CH is omitted due to same as L-CH

• Signal Path

73SENSOR

21CD-OPEN/CLOSE
20CD ENCORDER

LM-R

LM-F

TM-R

TM-F

DO

CLK
LCH

SOL-A

SOL-B

MOTOR

3 DATA

18 SO

4 CLK
5 LCK

6 SOL-A

7

SOL-B

8

MOTOR

E

JK441

R-CH

: TUNER

: CD

: PB(DECK A)

: PB(DECK B)

: REC(DECK B)

: AUDIO

SUB-WOOFER

SECTION

L

R

FAN

SPEAKER

J801

PHONES

2323

HCD-GX450

– BD/DRIVER SECTION –

OPTICAL PICK-UP

BLOCK

(KSM-215DCP/C2NP)

DETECTOR

VCC

VC

FOCUS

COIL

TRACKING

COIL

(SPINDLE)

M102

(SLED)

A

B

C

D

E

F

LD

GND

PD

VR

M101

+1.7V
+3.3V

Q10

DRIVER

IC251

SL/SP MOTOR

DRIVER

F+

16

CH2OUT-F

F

15

CH2OUT-R

T+

17

CH1OUT-R

T

18

CH1OUT-F

19

CH4OUT-F

M

20

CH4OUT-R

21

CH3OUT-R

M

CH3OUT-F

22

LD

CH1FIN

CH1RIN

CH2FIN

CH2RIN

SFDR

SRDR

OPIN+

MUTE

IC301

11

SDO0

16

LRCKIA

19

SFSY/LRCK1B

14

SDIO

15

BCKIA

18

SBSY/BCK1B

DIGITAL SIGNAL

PROCESSOR

STANBY

PO11/BUCK/AD1

SRMSTB

VDD

VDD

VDDM

MIACK

MICK

MIDIO

MILP

MICS

RESET

IC303

55

21

40

3

36

8
7

6

5

4

2

41

5 1

REG

SCOR

SENS
CLOCK

XLT

DATA

XRST

XTACN

3.3V

CN201

MP3STB

MP3REQ
MIACK

MICK
MIDIO

MILP

MICS

MP3RST

SRMSTB

SCOR

SENS
CLOCK

XLT

DATA

XRST

XTACN

LOUT

ROUT

DOUT

• R-CH is omitted due to same as L-CH

• Signal Path

PANEL

SECTION

A

MAIN

SECTION

B

: CD

MAIN

SECTION

D

LMR

LMF

TM-R

TM-F

TBL ADDRESS SW

E-1
E-2
E-3

OPEN SW

(LEVER SW)

E-3
E-2
E-1

CN701

S751

RE701

ROTARY

ENCODER

IC701

(LD)MOTOR DRIVER

RIN

OUT1

9

FIN

9
7

IC712

RIN
FIN

Q731

SWITCH

OUT2

OUT1
OUT2

11

TBL MOTOR DRIVER

4
2

4
2

M

M

IC731

(TABLE SENSOR)

M751(LOADING)

M741(TBL)

+3V

IC101

RF AMP

26

A

27

B

28

C

29

D

19

E

20

F

36

LD

XTAO

100

77

78

37

11

12

13

14

30

29

7

6

XTAI

PD

SSTP

TFDR

TRDR

FFDR

FRDR

CH3FIN

CH3RIN

MPD

XRST

X171

16.9MHz

+3.3V

SW101

5

6

7

8

9

10

3

24

PCMD1

LRCK1

LRCK

PCMD

BCK

BCK1

XTACN

XRST

DATA

XLAT

CLOCK

SENS

SCOR

GFS

C2PO

FOK

AOUT1

AOUT2

DOUT

100

102

104

105

107

115

113

114

61

62

63

65

66

60

95

1

2

3

81

86

71

XTACN

XRST

DATA

XLAT

CLOCK

SENS

SCOR

2424

– SUB-WOOFER SECTION –

HCD-GX450

IC501

AMP

+B

MAIN

SECTION

MAIN

SECTION

C

E

CN501

SW-SIG-IN

GND

SW-LIMIT

SW-SENCE

CN502

GND

OVERLOAD/DC

RELAY+ +B

PT-2

2

Q507

DETECT

Q503

DETECT

SW IN

3

-RE

8 12

+RE

13

Q502

CN503

SWITCH

CONTROL

Q501

OVERCOAR

DETECT

RY501

JK501

SUB WOOFER OUT

RELAY-

Q506,Q505

DETECT

2525

HCD-GX450

5-2. PRINTED WIRING BOARD – BD81A SECTION –

12

A

B

C302

C305

C303

R313

C315

C316

C314

R302

C

C312

R162

R165

X172

X171

C308

R191

C174

R171

D

R205

R201

FB301

C301

C201

C203

C318

C184

C210

C183

C182

C209

C151

E

R173

C172

R172

C171

• See page 21 for Circuit Boards Location.

3456789

R405

R351

R352

R354

R353

C258
C259

C196

C134

C195

C125

R121

C123

C15

C11

C10

C16

Q10

C257

C18

R11

E

C255

C14

R12

R13

R10

C260

R253

C116

C17

• : Uses unleaded solder.

C252

IC251

R252

R251

C251

C113

C114

R113

C112

C111

M101

SPINDLE

MOTOR

R114

R111

R112

CN101

OPTICAL
PICK-UP

BLOCK

(KSM–215DCP)

C320

C115

C307

C122

R411

C306

IC301

R307

C309

R303

R407

C163

IC101

C124

R132

C133

R133

R131

IC303

3

S101

(LIMIT)

R419

R404

C313

C310

R409

C212

C211

R163

C143

C132

R141

C142

R143

C131

4

C311

1

5

R301

R306

C194

C181

C162

C161

C152

R142
C141

R403

R304

R401

R408

R412

R203

C304

C317

R402

C213

R406

R161

R151

R305

R410

R182

R181

C186

C185

R204

M102

SLED

MOTOR

CN201

CN202

CONNECT

BOARD

CN251

(Page 33)

• Semiconductor

Location

Ref. No. Location

IC101 D-7
IC251 C-6
IC301 C-7
IC303 B-7

Q10 E-4

2626

HCD-GX450

5-3. SCHEMATIC DIAGRAM – BD81A SECTION –

10k

R307

TP433

MP3VDD

FB301

BLM21B272S

C308

C309

0.1 F

C307

0.1 F

47
4V

R303

100k

C310

0.1 F

IC303

BH15FB1W

C302

C303

0.1

0.1

F

F

TP422

MP3GND

CN201

27P

C311

0.1 F

TP401

TP402

TP403

TP404

TP405

TP406

TP407

TP408

TP417

TP416

TP415

TP414

TP413

TP412

TP419

TP434

TP410

TP411

TP409

IC301

TC94A34FG-002

C305

TP186

MVDD

TP187

MGND

MP3STB

MP3REQ

MIACK

MICK

MIDIO

MILP

MICS

MP3RST

R205

SCOR

SENS

CLK

XLT

DATA

XRST

XTCN

AVDD

ROUT

LOUT

DOUT

R204

0

TP304

0.0022 B

TP
301

0

306
R

C312

0.1 F

220

4V

R411

0

R410

R409

R408

R407

R406

R412

C213

22p CH

R313

220

100

100

100

100

100

100

100

22p CH

C211

DVDD

C212

TP435

C315

0.1 B

C316

• See page 46 for IC PIN FUNCTION DESCRIPTION.

R203

0

TP302

TP303

R351

100

10k

R405

R404

R419

R403

R402

R401

R301

C317

0.01 B

0.1 F

47 4V

C306

0.1 F

100

100

100

100

100

100

C318

0.01
B

100k

R305
100k

C320

0

TP436

AVDD

C201

100

0

10V

R201

TP420

AGND

C203
100
10V

B
09
C2

.01

0

TP421

DGND

R302

C313

C314

220p CH

C174

0.1 F

C15

C10C11

10

10

0.1

6.3

6.3

F

B

C13

NM

R253

10k

IC251
BA5947FM
(HSOP28)

B

C259

0.1

C258

F

0.1

+
P

SL+

S

SL-

2

1

3

25

25

25

TP

TP

TP

F

257

.1

C

0

B

C134

0.1 F

5

42
1

01

C

C151

100
10V

0

1

1

2

15

15

R

C

C143

0.1 F

TP427
PCMDI

TP103

R352

LRCK

100

R353

100

TP104

PCMD

R354

100

TP105

C161

0.1 F

R173

0

C185

2200p CH

R181
100

C186

2200p CH

BCK

R161

100

0.1 F

C162

R171C171

47022p CH

R172

1M

X171C172

16.9MHz27p CH

C181

0.1 F

C183

22 6.3V

C184

22 6.3V

R182

100

0.1 F

C182

C194

0.1
F

142
P
T

0

165
R

C210

0.1 B

0.0

43
1

.3k
3

R

B

141
C

0.1

142

1k

R

.7k
4

41
1
R

K

8

SO

EXC

P14

SB

T

TP149

C163

0.1

3

0

16

10

R

R162

47k

B

1

0.0

33
C1

133
R

32
1
R

IC101

CXD3059AR

0.1

96
C1

B

132
C

.47
0

H
C

0p

CI

10

1M

FA
R

1

31

13

180k

R

C1

125
TP

10k

0
1

19
R

C125

0.1 F

CH

B

4

p

12

O

C

C

0.1

15k

A

330

F
R

121

R
124
P
T

K

F
G

FC

144

145

U
X

W

TP

TP

22

B

0.1

3

C1

C12

K

3

47

C
XP

TP1

TP15

2

123

12

TP

TP

O
C

121

FD
R

TP

R111

1k

C111

0.0033 B

R112

15k

C112

470p

C113

JPO102

JPO103

C115

0.1 F

TP167
LOCK

TP178

FOK

TP166

DFCT

TP165

MIRR

K

O

0

T

C

146

2P

P

GFS

C

T

U

D

162

16

O

P

C

W

T

TP

R193

NM

0.0033

FEI

R114

R113

TEI

S101

SW

15k

1k

C114

470p B

C116

100
10V

0.1 F

C195

+
25
4

SW

P
T

-

426

SW

TP

C17

R12

220

100k

4V

JPO10

TP177

VC

TP432

MDP

R11

TP429

FFDR

TP431

TFDR

R251

10k

C260

220 10V

0

TP428

TP430

R252

JPO004

MDP

22k

C251

0.0068

APC

TP423

IOP1

C16

R13

1

1

F

TP424

IOP2

R10

3.3

Q10

2SB1690K

C18

0.001 B

FRDR

TRDR

B

C252

0.1 F

C255

0.1 F

CN101

16P

E

TP10

D

TP11

A

TP12

B

TP13

C

TP14

F

TP102

PD

TP15

F+

TP16

F-

TP17

T-

TP18

F-

TP19

P-

250

S

TP

M101

M102

2727

HCD-GX450

5-4. PRINTED WIRING BOARD – CD MECHANISM SECTION –

1

234567891011121314

A

B

C

D

• See page 21 for Circuit Boards Location.

CN704

C751

C737

C736

C735

JW710

R723

R722

CN703

R721

R702

D701

R701

D711

C741

R713

CN702

R735

JW709

R734

JW708

R732

R733

JW711

JW707

JW706

JW705

CN705

JW712

Q731

R751

C752

CN741

CN742

C715

E

F

G

H

• Semiconductor

Location

Ref. No. Location

D701 D-6
D711 D-7

CN721

JW713

JW714

IC701

R711

R712

JW701

IC712

JW704

JW703

JW702

R731

C731

CN701

MAIN

BOARD

CN301

(Page 30)

IC731

CN751

CN731

S751

(LEVER SW)

IC701 F-6
IC712 F-7
IC731 E-11

Q731 C-9

2828

5-5. SCHEMATIC DIAGRAM – CD MECHANISM SECTION –

HCD-GX450

IC701

BA6956AN

LD MOTOR

DRIVER

M751

(LOADING)

CN721

2P

CN704

2P

R713

22k

R702

100

MTZJ-T-77-5.1A

R712

4.7k

D701

R701

470

C751

0.01

R711

1k

VREF

VREF

OUT2

OUT2

RNF

RNF

OUT1

VM

IC712

BA6956AN

TBL MOTOR

DRIVER

OUT1

VM

VCC

VCC

FIN

FIN

GND

GND

RIN

RIN

C715

100

16V

R751

4.7k

C752

0.1

CN705

2P

CN701

12P

CN301

32

S751

(LEVER SW)

CN751

2P

IC731

RPI-576

TABLE

SENSOR

CN731

3P

CN741

3P

M741
(TBL)

CN742

5P

C741

0.01

CN702

5P

D711

MTZJ-T-77-3.6B

R735

100

R734

12k

R733

1k

R732

10k

DTC114ESA

TBL ADDRES

SENS SWITCH

2929

R731

100

Q731

C731

10

50V

R721

4.7k

C735

0.1

R722

4.7k

C736

0.1

no mark : FM

R723

4.7k

C737

0.1

CN703

4P

CN751

4P

RE701

ROTARY

ENCODER

E-3
E-2
E-1

HCD-GX450

5-6. PRINTED WIRING BOARD – MAIN SECTION –

12

345678910111213

A

JW146

R310

JW108

JW121

29

JW93

JW122

JW137

R308

C374

Q309

E

JW151

JW123

JW124

C354

JW128

JW129

JW130

JW131

JW132

JW133

JW134

D325

D326

JW98

JW97

JW96

JW95

JW94

C353

JW91

JW89

JW90

JW92

B

C

D

E

F

G

PB

HEAD

REC/PB

HEAD

ERASE
HEAD

L CH

R CH

R CH

L CH

HP1

HP2

HE1

HRP2

HRP1

CONNECT

(Page 33)

(Page 37)

DECK-A

(PLAY)

DECK-B

(REC/PLAY)

BOARD

CN254

PANEL

BOARD

CN601

Q313

R311

E

C376

R312

JW125

JW126

JW127

CN302

28

JW135

JW136

1

2

3

1

2

3

4

3

4

H

LP303

1

H/P JACK

I

BOARD

CN804

(Page 33)

CN309

5

R219

R217

R218

R216

J

JW138

• See page 21 for Circuit Boards Location.

Q308

E

R306

R383

R381

R382

R384

IC371

R374

FB203

FB202

C222

R203

E

CN112

R248

E

R247

R214

E

Q351

R354

JW87

JW201

R379

R380

JW109

JW145

R377

R378

R375

R376

FB204

10

C216

R212

R208

Q307

R209

E

Q306

JW141

R210

R206

C211

R205

R207

R204

Q305

Q304

R201

C111

3

C265

1

C112

C264

91

Q322

E

JW100

R246

Q324

E

R252

R213

C351

R351

R353

R356

R357

D215

JW88

JW81

R363

R394

C235

JW110

E

E

JW101

JW99

1

R264

C259

JW86

R388

R395

JW120

C212

JW142

C213

Q102

R105

C107

R202

IC201

CN103

R266

D214

R265

D322

R392

R393

R389

R390

LP304

EP101

JW119

R211

R281

E

C258

R313

R397

JW112

JW113

JW114

JW115

JW116

R138

C159

C101

C102

R101

R104

R103C105

C106

C104

R198

C193

C110

R108

C206

C108

R106

R283

R282

R245

C267

R387

JW202

R284

JW106

C113

JW102

C249

C266

8

C251

R262

R263

Q327

C253

D212

D213

C321

R322

JW84

JW157

D321

JW85

R391

R385

R386

R396

Q371

E

C103

C247

JW156

R280

R139

C109

R109

C114

R244

9

6

C246

R253

C252

R364

R321

R325

LP302

R307

C375

C373

C372

C371

R371

R372

R373

JW150

R272

FB201

C217

C214

JW140

JW139

D324

Q323

R249

C250

D211

R251

R250

C352

R358

R352

E

Q352

C115

L101

JW117

R197

JW159

C245

E

E

• : Uses unleaded solder.

GAMEJACK

BOARD

CN801

(Page 33)

JW107

1

3

CN314

R141

R142

JW311

C151

R135

C270

C120

C117

JW103

R136

C150

C149

C146

R117

C122

C248

R242

D310

C148

C142

C144

C141

C275

R132

C133

C127

C126

C125

C124

R115

JW42

C242

E

JW78

1

IC304

JW67

D311

C305

CN303

JW69

R273

R133

R134

C145

R127

C274

C136

R126

R125

JW38

JW39

C123

JW43

Q321

R241

C318

3

C147

R176

R131

C140

C139

Q106

R128

Q107

C135

R177

R124

C134

R123

C128

JW37

R196

JW40

JW41

JW44

JW45

1

IC303

JW75

JW74

JW76

JW77

C313

JW66

D305

D307

D309

JW68

D306

C303

C304

1

C162

C152

C153

JW155

C121
C119

R116

R112

R114

R194

JW104

C118

C241

C244

C243

R362

Q361

E

R361

Q314

E

JW80

R324

D316

C316

D312

C306

11

C164

JW118

C157

C154

C160

R137

IC101

R107

R113

C191

R111

R110

C116

R195

R243

1

C192

33

JW79

Q362

R323

Q315

R274

R275

JW83

JW82

JW158

1

R346

R347

JW33

C143

E

R129

E

R121

R120

R119

C131

C129

C311

C315

3

R168

C138

R169

JW34

C180

C137

C186

C132

C187

R172

C130

R118

C308

D313

3

1

IC301

JW71

JW72

JW73

C310

JW65

JW64

D301

D302

D303

D308

C302

C301

CN301

R345

IC102

JW35

R182

C309

JW70

D304

DRIVER
BOARD

CN701

(Page 28)

CN101

JW2

JW3

JW4

JW5

12

JW18

R348

R342

R341

R344

R343

C342

JW8

C166

JW1

TUNER

• Semiconductor Location

JW6

JW7

C165

CN308

1

C228

LP301

3

FAN

Ref. No. Location

D201 I-10
D202 H-10
D203 H-11
D204 H-11
D205 I-11

Ref. No. Location

IC301 G-8
IC302 E-9
IC303 G-7
IC304 G-7
IC371 B-4

D206 I-10

JW17

JW16

JW15

JW14

JW13

JW12

JW11

JW10

R167

R166

C179

C177

JW36

R170

C181

C183

R171

C184

JW50

D315

JW63

JW305

C176

R164

C178

R160

R161 R165

C185

C312

1

JW32

3

IC302

JW301

D314

JW46

JW47

JW48

JW49

R153

E

Q102

Q101

R152

E

C175

R151

R156

JW61

JW62

JW59

13

JW58

JW22

JW21

JW23

JW24

JW29

JW30

JW31

R154

R155

R158

R157

JW52

JW56

E

JW148

R159

Q104

E

R163

Q103

JW51

JW53

JW54

R223

JW55

JW57

R222

JW149

CN307

JW9

JW19

JW20

R189

JW27

Q105

R173

C190

C189

E

Q310

R226

R225

C229

R227

C230

D202

E

R232

Q312

R231

R230

D201

R221

R220

R229

1

JW144

JW143

C199

R186

R184

IC104

C202

C198

JW26

C196

R181

R187

R182

E

C203

R174

R175

R268

R269

C188

R270

JW105

R228

Q311

E

D203

D204

D205

D207

D206

JW302

JW303

R199
R192

Q303

R178

E

C194

R193

Q108

E

R271

C231

1

4

CN306

R147

SUB-WOOFER

BOARD
CN501

(Page 35)

12

EP301

D207 I-10
D211 F-4
D212 G-5
D213 G-5
D214 G-5
D215 G-4
D301 I-8
D302 I-8
D303 I-8
D304 I-8
D305 I-7
D306 I-7
D307 I-7
D308 I-7
D309 I-7
D310 I-6
D311 I-6
D312 I-6
D313 F-8
D314 F-9
D315 H-8
D316 G-6
D321 H-5
D322 H-5
D324 E-4
D325 E-4
D326 F-4

IC101 D-6
IC102 D-8
IC104 D-11
IC201 E-5

Q101 H-9
Q102 H-9
Q103 H-9
Q104 H-10
Q105 E-10
Q106 D-7
Q107 D-7
Q108 F-11
Q303 E-11
Q304 E-4
Q305 E-4
Q306 B-4
Q307 B-4
Q308 B-4
Q309 B-3
Q310 H-10
Q311 H-11
Q312 H-10
Q313 B-3
Q314 G-6
Q315 G-6
Q321 F-7
Q322 F-4
Q323 F-4
Q324 F-4
Q327 G-5
Q351 G-4
Q352 G-4
Q361 G-6
Q362 G-6
Q371 I-5

(CHASSIS)

(CHASSIS)

K

TRANS

BOARD

CN907

(Page 40)

AMP

BOARD

CN441

(Page 41)

3030