Sony HCD-GX255, HCD-RG170, HCD-RG470 Service Manual

HCD-GX255/RG170/RG470

Amplifier section Canadian model: HCD-GX255

Continuous RMS power output (reference):

65 + 65 watts (6 ohms at 1kHz, 10% THD)

Total harmonic distortion less than 0.07% (6 ohms at

1kHz, 40 W)

European and Russian models: HCD-RG470

DIN power output (rated): 110 + 110 watts (6 ohms at

1kHz, DIN)

Continuous RMS power output (reference):

140 + 140 watts (6 ohms at 1kHz, 10% THD)

Music power output (reference):

280 + 280 watts (6 ohms at 1kHz, 10% THD)

HCD-RG170

DIN power output (rated): 20 + 20 watts (6 ohms at

1kHz, DIN)

Continuous RMS power output (reference):

25 + 25 watts (6 ohms at 1kHz, 10% THD)

Music power output (reference):

50 + 50 watts (6 ohms at 1kHz, 10% THD)

Other models: HCD-RG470

The following measured at AC 120, 127, 220, 240 V 50/60 Hz DIN power output (rated): 130 + 130 watts (6 ohms at

1kHz, DIN)

Continuous RMS power output (reference):

160 + 160 watts (6 ohms at 1kHz, 10% THD)

HCD-RG170

The following measured at AC 120, 127, 220, 240 V 50/60 Hz DIN power output (rated) : 50 + 50 watts ( 6 ohms at

1kHz, DIN)

Continuous RMS power output (refe rence):

65 + 65 watts ( 6 ohms at 1kHz, 10% THD)

Inputs AUDIO IN (stereo mini jack):

voltage 250 mV, impedance 47 kilohms

MIC (phone jack) (Latin American model only):

sensitivity 1 mV, impedance 10 kilohms

Outputs PHONES (stereo mini jack):

accepts headphones of 8ohms or more

VIDEO OUT (phono jack) (Mexican model only):

max. output level 1Vp-p, unbalanced, Sync negative, load impedance 75 ohms

SPEAKER: accepts impedance of 6 to

16 ohms

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 len s sur f ace on the Optical Pick-up Block with 7mm aperture.

Frequency response 2 Hz − 20 kHz (±0.5 dB) Signal-to-noise ratio More than 90 dB Dynamic range More than 90 dB

SERVICE MANUAL

Canadian Model

HCD-GX255

Ver. 1.1 2005.05

AEP Model

E Model

HCD-RG170/RG470

Australian Model

HCD-RG170

HCD-GX255 is the amplifier, CD play er, tape dec k and tuner section in MHC-GX255. HCD-RG170 is the amplifier, CD play er , tape deck and tuner section in MHC-RG170. HCD-RG470 is the amplifier, CD play er , tape deck and tuner section in MHC-RG470.

Model Name Using Similar Mechanism NEW CD CD Mechanism Type CDM74KFS-F1BD81C (Except Mexican model)/CDM74KFS-F1BD84 (Mexican model) Section Base Unit Name BU-F1BD81C (Except Mexican model)/BU-F1BD84 (Mexican model)

Optical Pick-up Block Name KSM-215DCP TAPE Model Name Using Similar Mechanism HCD-GX355/RG270 Section Tape Transport Mechanism Type CWM43FF13

Photo: HCD-GX255

9-879-612-02

Sony Corporation

Personal Audio Group Published by Sony Engineering Corporation

SPECIFICATIONS

COMPACT DISC DECK RECEIVER

– Continued on next page –

HCD-GX255/RG170/RG470

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 superheterodyne tuner

FM tuner section

Tuning range North American model: 87.5 − 108.0 MHz

(100 kHz step)

Other models: 87.5 − 108.0 MHz

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

AM tuner section

Tuning range Pan-American models: 530 − 1,710 kHz

(with the tuning interval

set at 10 kHz)

531 − 1,710 kHz

(with the tuning interval

set at 9 kHz) European, Russian and Saudi Arabian mode ls :

531 − 1,602 kHz (with the

tuning interval set at

9kHz) Other models: 530 − 1,710 kHz

(with the tuning interval

set at 10 kHz)

531 − 1,602 kHz

(with the tuning interval

set at 9 kHz) Antenna AM loop antenna Intermediate frequency 450 kHz

General

Power requirements North American model: 120 V AC, 60 Hz European and Russian models:

230 V AC, 50/60 Hz Australian model: 230 − 240V AC, 50/60 Hz Argentine model: 220 V AC, 50/60 Hz Mexican model: 127 V AC, 60 Hz Saudi Arabian model: 120 − 127, 220 or

230 − 240V AC, 50/60 Hz

Adjustable with voltage

selector Other models: 120 V, 220 V or

230 − 240V AC, 50/60 Hz

Adjustable with voltage

selector Power consumption

Canadian model: HCD-GX255: 110 watts European and Russian models: HCD-RG470: 240 watts

0.25 watts (at the Power

Saving Mode) HCD-RG170: 70 watts

0.25 watts (at the Power

Saving Mode) Other models: HCD-RG470: 170 watts HCD-RG170: 125 watts

Dimensions (w/h/d) (excl. speakers)

Approx. 280 × 325 ×

430 mm Mass (excl. speakers)

Canadian model: HCD-GX255: Approx. 8.5 kg European and Russian models: HCD-RG470: Approx. 10.0 kg HCD-RG170: Approx. 7.2 kg Other models: HCD-RG470: Approx. 10.4 kg HCD-RG170: Approx. 8.5 kg

Design and specifications are subject to change without notice.

2

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

CAUTION

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

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

HCD-GX255/RG170/RG470

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

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQ UE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

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 viscou-s (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.

3

HCD-GX255/RG170/RG470

SERVICING NOTES

HCD-GX255/RG170/RG470

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 DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveforms is output three times.

DISCRIMINATION OF THE MAIN BOARD

There are two types of suffix-11 and suf fix-12 of the MAIN boards used in set as follows.

– MAIN BOARD (Component Side) –

• MODEL IDENTIFICATION – Back Panel –

Model number labe

Label indication Model

2-560-990-01 GX255 2-560-991-01 RG170: AEP, EE, RU 2-560-993-01 RG470: E2, E3 2-560-994-01 RG170: EA 2-560-996-01 RG170: AUS 2-560-997-01 RG170: E51 2-560-998-01 RG170: AR 2-580-000-01 RG470: AEP, EE, RU 2-580-001-01 RG470: E2 2-580-002-01 RG470: E51 2-580-003-01 RG470: MX 2-580-004-01 RG470: AR

Part Number AEP, EE, RU models : 1-865-919-12 only Other models : 1-865-919-11 or 1-865-919-1

• Abbreviation

AR : Argentina model AUS: Australian model CND : Canadian model E2 : 120V AC Area in E model E3 : 240V AC Area in E model E51 : Chilean and Peruvian models EA : Saudi Arabia model EE : East European model MX : Mexican model RU : Russian model

5

HCD-GX255/RG170/RG470

12345678 q

• Location of Controls

Main unit

ALPHABETICAL ORDER

A – O P – Z

ALBUM +/− qs AUDIO IN wl AUDIO IN jack wf CD es CD SYNC wj Deck A wg Deck B qk DISC 1 − 3 qa DISC SKIP/EX-CHANGE qd

Disc tray 0 DISPLAY 3 Display window 5 ECHO LEVEL EFFECT ON/OFF 4 ENTER 4 EQ BAND qs GROOVE 4 ILLUMINATION 2 MIC jack MIC LEVEL MULTIPLEX Operation Dial

(− EQ +/l L/

− TUNING +) qj

2)

wd

2)

ws

1)

6

wa

SECTION 2

GENERAL

P FILE 4 PHONES jack w; PLAY MODE 8 Power illuminator qg PRESET EQ 4 REC PAUSE/START wl Remote sensor 7

SURROUND 4 TA P E A/B e; TUNER/BAND ea TUNING MODE 8 VOLUME control ql

es ea e; wl wk wj wh wg

wf

This section is extracted from instruction manual.

BUTTON DESCRIPTIO

?/1 (power) 1

X (pause) qs x (stop) qs M (fast forward) qs N (play) qs m (rewind) qs Z (eject) qf PUSH Z (deck B) (eject) qh Z PUSH (deck A) (eject) wh

1)

Mexican model only

2)

Latin American model only (Mexican model comes with 2microphone jacks)

NS

;

L

l

j

A

H

S

s

B

qa qs qd qf qg qh qj qk ql w;

6

wd

ws

wa

Remote control

HCD-GX255/RG170/RG470

ALPHABETICAL ORDER

A – E

ALBUM + qa ALBUM − qd CD qk CLEAR qg CLOCK/TIMER SELECT 2

CLOCK/TIMER SET 3 DISC SKIP q; DISPLAY wa ENTER 9 EQ qf

F – Z

FM MODE 4 FUNCTION 6

PLAY MODE w; REPEAT 4 SLEEP ws TAPE qj TUNER BAND 5 TUNER MEMORY ql TUNING MODE w; VOLUME +/− qs

ws wa w; ql qk qj

qh

BUTTON DESCRIPT

?/1 (power) 1 m/M (rewind/fast forward)

7

N (play) 8 X (pause) 8 x (stop) 8

+/− (tuning) qh ./> (go back/go forward)

qh

IONS

1 2 3 4 5 6

7

qg qf

qd

8

9 q;

qa qs

7

HCD-GX255/RG170/RG470

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

3-1. DISASSEMBLY FLOW

SET

3-2. CASE (TOP)

(Page 9)

3-3. DOOR (CD)

(Page 9)

3-4. FRONT PANEL SECTION

(Page 10)

SECTION 3

DISASSEMBLY

3-6. CD MECHANISM DECK

(CDM74KFS-F1BD81C (EXCEPT MX MODEL)/ CDM74KFS-F1BD84 (MX MODEL)) (Page 11)

3-7. BACK PANEL SECTION

(Page 11)

3-8. MAIN BOARD

(Page 12)

3-5. MECHANICAL DECK

3-9. BD BOARD/

CD BOARD (Page 12)

3-10. DRIVER BAORD,

(CWM43FF13) (Page 10)

3-11. OPTICAL PICK-UP

SW BOARD (Page 13)

(KSM-215DCP) (Page 13)

3-12. SENSOR BOARD

(Page 14)

3-13. MOTOR (TB) BOARD

(Page 14)

3-14. MOTOR (LD) BOARD

(Page 15)

8

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

3-2. CASE (TOP)

0

case (top)

5

6

case (side-R)

two screws (B3)

8

HCD-GX255/RG170/RG470

7

two screws (B3)

4

three screws (case 3 TP2)

3-3. DOOR (CD)

9

3

case (side-R)

8

1

three screws (case 3 TP2)

2

two screws (B3)

3

two claws

4

door (CD)

–BOTTOM VIEW– CD mechanism deck

1

Turn the pulley in the direction of the arrow.

Front panel side

2

Pull-out the disc tray.

9

HCD-GX255/RG170/RG470

3-4. FRONT PANEL SECTION

•

Abbreviation AR : Argentina model E2 : 120V AC Area in E model E51 : Chilean and Peruvian models MX : Mexican model

(E2, E51, AR, MX)

5

connector (CN066)

8

screw (B3)

1

connector (CN061)

9

front panel section

6

four screws (B3)

3-5. MECHANICAL DECK (CWM43FF13)

•

Abbreviation MX : Mexican model

(MX)

7

cover (TCM)

7

screw (B3)

2

3

connector (CN203)

coating clip

4

connector (CN065)

3

connector (CN201)

(except MX)

2

harness

1

screw (2.6

×

8) (except MX)

×

10) (MX)

(2.6

5

two screws (2.6 × 8) (except MX) (2.6

×

10) (MX)

4

two screws (2.6

×

8)

10

8

mecanical deck (CWM43FF13)

6

screw (2.6 × 8) (except MX) (2.6 × 10) (MX)

HCD-GX255/RG170/RG470

3-6. CD MECHANISM DECK

(CDM74KFS-F1BD81C (EXCEPT MX MODEL)/CDM74KFS-F1BD84 (MX MODEL))

7

CD mechanism deck

(MX)

6

connector (CN1004)

2

(CDM74KFS-F1BD81C (except MX)/CDM74KFS-F1BD84 (MX))

1

three screws (B3)

5

wire (flat type) (13 core) (CN331)

(MX)

3

wire (flat type) (13 core) (CN701)

3-7. BACK PANEL SECTION

2

connector (CN903)

1

connector (CN906)

4

wire (flat type) (27 core) (CN201) (Except MX) wire (flat type) (31 core) (CN201) (MX)

3

connector (CN901)

•

8

back panel section

4

wire (flat type) (15 core) (CN381)

Abbreviation MX : Mexican model

5

connector (CN041)

6

two screws (B3)

7

two screws (B3)

11

HCD-GX255/RG170/RG470

)

3-8. MAIN BOARD

5

MAIN board

4

connector (CN441)

MAIN

board

1

connector (CN907)

3-9. BD BOARD/CD BOARD

•

Abbreviation MX : Mexican model

3

Remove soldering from the four points.

2

connector (CN905)

3

two screws (B3)

2

screw

(+BVTP 2.6

4

BD

board (MX)/

CD

board (except MX)

1

× 8

)

wire (flat type) (16 core) (CN101

12

3-10. DRIVER BOARD, SW BOARD

1

two

(+BTTP (M2.6))

4

DRIVER

2

wire (flat type) 5p (CN702)

screws

board

3

connector

4p (CN703)

HCD-GX255/RG170/RG470

5

screw

(+BTTP (M2.6))

6

SW board

3-11. OPTICAL PICK-UP (KSM-215DCP)

•

Abbreviation MX : Mexican model

8

7

(insulator)

6

(+PTPWH M2.6)

2

h

older (213) ASSY

qf

optical pick-up

(KSM-215DCP)

two

insulators

two

coil springs

two floating

screw

9

1

floating

(+PTPWH M2.6)

5

two

insulators

4

two

coil springs

(insulator)

3

two floating

(+PTPWH M2.6)

qs

wire

(flat type)

(CN101)

qd

B

D board (MX)/

C

D board (except MX)

screw

qa

Remove the four solderings of motor.

0

s

crew (+BVTP 2.6x 8)

13

HCD-GX255/RG170/RG470

3-12. SENSOR BOARD

1

floating

(+PTPWH M2.6)

2

t

ray

6

floating

(+PTPWH M2.6)

7

g

ear (geneva)

screw

8

s

crew

(+BTTP (M2.6))

screw

0

SENSOR board

9

connector

(

CN731)

3

b

elt (table)

4

floating

(+PTPWH M2.6)

5

screw

p

ulley (table)

3-13. MOTOR (TB) BOARD

2

stopper

4

1

stopper

7

t

able motor assy (M741)

wire (flat type) 5 core (CN742)

3

8

MOTOR (TB) board

6

Remove the two solderings of motor.

14

5

two

screws

(+BTTP (M2.6))

3-14. MOTOR (LD) BOARD

4

Remove the two solderings of motor.

5

l

oading motor assy (M751)

2

two

screws

(+BTTP (M2.6))

3

MOTOR (LD) board

HCD-GX255/RG170/RG470

1

b

elt (loading)

15

HCD-GX255/RG170/RG470

[ --- EQ + ]

Ll

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 of x , [ILLUMINATION] and [DISC 1] simultane-ously.

2. The message “COLD RESET” is displayed on the fluorescent indicator tube momentarily, then becomes standby states.

AM TUNING INTERVAL CHANGE-OVER (Except AEP, East European, Russian model)

A step of AM tuning interval can be changed over between 9 kHz and 10 kHz.

Procedure:

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

2. Press the [TUNER/BAND] button to select “AM”.

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

4. Press two buttons of [PLAY MODE/TUNING MODE] and I/1 simultaneously.

5. The message “AM 9K STEP” or “ AM 10K STEP” is displayed on the fluorescent indicator tube, and thus the channel step is changed over.

CD SHIP (LOCK) MODE

This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

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

2. Press the [CD] button to select “CD”.

3. Press two buttons of [CD] and [POWER] simultaneously.

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

AMP TEST MODE

This mode is used to display the parameter of amplifier IC and display the VACS status.

Procedure:

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

2. Press three buttons of x , [ILLUMINATION] and [PRESET EQ] simultaneously.

3. When the AMP test mode is activated, the message “AMP TEST IN” is displayed on the fluorescent indicator tube momentarily, then amplif ier adjustment mode is displayed on the fluorescent indicator tube.

4. Press the [DISPLAY] button to changed over between VACS status display mode and the amplifier IC parameter display mode.

5. In this mode, press the [GROOVE] button to changed over DBFB on/off, and “DBFB ON” or “DBFB OFF” is displayed on the fluorescent indicator tube.

6. In this mode, press the [SURROUND] button to changed over surround on/off, and “SURROUND ON” or “SURROUND OFF” is displayed on the fluorescent indicator tube.

7. In this mode, press the [EQ BAND] button to enter the equalizer adjustment mode.

In the equalizer adjustment mode, press the [EQ BAND] button

to change over the adjustment band as LOW/MID/HIGH. And turn the each bands.

8. To release the amplifier IC parameter display mode or equalizer adjustment mode, press the I/1 button to the power off.

knob to adjust the equalizer level of

CD SHIP (LOCK) MODE & COLD RESET

This mode is used to perform CD chip (lock) mode and cold reset simultaneously.

Procedure:

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

2. Press the [CD] button to select “CD”.

3. Press three buttons of x , [CD] and [DISPLAY] simultaneously.

4. The message “COLD RESET” is displayed on the fluorescent indicator tube momentarily, then becomes standby states.

CD TRAY LOCK MODE

This mode is used to unable to take sample disc out of tray in the shop.

Procedure:

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

2. Press the [CD] button to select “CD”.

3. Load a disc and press two buttons of x and Z for 5 seconds.

4. The message “LOCKED” is displayed on the fluorescent indicator tube and the CD tray is locked. (Even if pressing the Z button, the message “LOCKED” is displayed on the fluorescent indicator tube and the CD tray is locked)

5. To release this mode, press two buttons of x and Z for 5 seconds.

6. The message “UNLOCKED” is displayed on the fluorescent indicator tube and the CD tray is unlocked.

16

HCD-GX255/RG170/RG470

AGING MODE

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

If an error occurred:

The aging operation stops only an error occurred sections and display then status.

If no error occurs:

The aging operation continues repeatedly.

Procedure:

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

2. Press the [CD] button to select “CD”.

3. Load three discs and insert two tape to the deck A and B.

4. Press three buttons of x , [ILLUMINATION] and [DISC SKIP/EX- CHANGE] simultaneously.

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

6. To release this mode, press the I/1 button to turn the power off or press the function buttons to change the function.

1. Display at the Aging Mode

Display operating state of CD section and tape deck section alternately. If an error occurred, stop display which that section.

2. CD Section

The sequence during the aging mode is following as below. Display at the aging mode is the same as the normal operation.

Aging mode sequence (CD section) :

3. Tape Deck Section

The sequence during the aging mode is following as below. If an error occurred, stop display that step.

Aging mode sequence (tape deck section) :

Rewind the tape A and B

“TAPE AAG-1 or TAPE BAG-2”

Shut off

FWD play the tape A

“TAPE AAG-3”

2 minutes

Rewind the tape A

“TAPE AAG-6”

Shut off

FWD play the tape B

“TAPE BAG-3”

2 minutes

Rewind the tape B

“TAPE BAG-6”

Shut off

Start (from disc 1)

Disc chucking

TOC read

Play first track for 2 seconds

Play last track for 2 seconds

EX-change open/close

Open the disc tray

Disc skip

Close the tray

Change the next disc.

Note: “TAPE *AG-*” is display of each step.

PANEL TEST MODE

This mode is used to check the fluorescent indicator tube, LEDs and buttons.

Procedure:

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

2. Press three buttons of x , [ILLUMINATION] and [GROOVE] simultaneously.

3. Fluorescent indicator tube and LEDs are all turned on.

4. Press two buttons of [ALBUM ---] and [ENTER] simultaneously, mode is changed over.

5. In the key check mode, press each key , the defined key number of every each ke y list is displayed on the fluorescent indicator tube.

6. In the key count check mode, “KEYCNT 0” is displayed on the fluorescent indicator tube. Each time a key is pressed, “K” value increases. Howe ver , once a key is pressed, it is no longer taken into account.

7. In the headphone input check mode, connect the headphone, the message “H_P ON” is displayed on the fluorescent indicator tube, and disconnect the headphone, the message “H_P OFF” is displayed on the fluorescent indicator tube.

8. In the volume check mode, “VOLUME FLAT” is displayed on the fluorescent indicator tube. Turn the [MASTER VOLUME] knob clockwise , the message “VOLUME UP” is displayed on the fluorescent indicator tube momentarily and turn the [MASTER VOLUME] knob counterclockwise, the message “VOLUME DOWN” is displayed on the fluorescent indicator tube momentarily.

17

HCD-GX255/RG170/RG470

MC TEST MODE

This mode is used to check operations of microprocessor.

Procedure:

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

2. Press three buttons of x , [ILLUMINATION] and [DISC 3] simultane-ously.

3. When the MC test mode is activated, VACS level is displayed on the fluorescent indicator tube momentarily.

4. Turn the

[ --- EQ + ]

Ll

knob clockwise, the message “ALL EQ MAX” is displayed on the fluorescent indicator tube momentarily and turn the

[ --- EQ + ]

Ll

knob counter-clockwise, the message “ALL EQ MIN” is displayed on the fluorescent indicator tube momentarily.

5. Press the [PRESET EQ] button, the message “ALL EQ FLAT” is displayed on the fluorescent indicator tube momentarily.

6. Turn the [MASTER VOLUME] knob clockwise, the message “VOLUME MAX” is displayed on the fluorescent indicator tube momentarily and turn the [MASTER VOLUME] knob counterclockwise, the message “VOLUME MIN” is displayed on the fluorescent indicator tube momentarily.

7. Press the [GROOVE] button to changed over VACS on/off.

8. When the [CD SYNC] key is pressed with the test tape (AMS- 100, AMS-110A) in the deck, number of space between tunes is counted, then if AMS-110A is set, “OK” is displayed on the fluorescent indicator tube and if AMS-100 is set, “NG” is displayed on the fluorescent indicator tube.

9. Press the I/1 button to release from this mode, then cold reset is performed.

VERSION DISPLAY MODE

This mode is used to check the model, destination and software version.

Procedure:

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

2. Press three buttons of x , [ILLUMINATION] and [DISC 2] simultane-ously.

3. When this mode is activated, model and destination is displayed on the fluorescent indicator tube.

4. Press the [DISPLAY] button to changed ov er between software version and year, month, day of the software creation display mode and model and destination display mode.

5. To release this mode, press three buttons of x , [ILLUMI NATION] and [DISC 2] simultaneously.

CD ERROR CODE DISPLAY MODE

This mode can be used for error code display of CD section.

Procedure:

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

2. Press the [CD] key to select “CD”.

3. Press three buttons of x , [CD] and [DISC 1] simultaneously.

4. When this mode is activated, mechanism deck error code is displayed on the fluorescent indicator tube.

5. Press the [GROOVE] button to changed over between optical pick-up error code display mode and mechanism deck error code mode.

6. Turn the

[ --- EQ + ]

history.

7. To release this mode, press the I/1 button to turn the power off.

Ll

knob to change o ver display of error

1. Mechanism Deck Error Code Mode

When this mode is entered, mechanism deck error code is displayed with the 10-character format on the fluorescent indicator tube.

The first digit from the left indicates:

The first digit from the left indicates which mode the error history is. In the mechanism deck error code mode, “M” is displayed on the fluorescent indicator tube.

The second digit from the left indicates:

(Error history number display) The second digit from the left indicates which order the error history is. “1” indicates the latest error history, and each time the number increases by one, the error history goes back to one-previous error.

The third and 4th digit from the left indicates: (Error status display)

The third and 4th digit from the left indicates which error status is indicated.

Display Status

00 No error 08 Table operation time-out (Table does not mo ve to the target

position within the specified time)

16 In the chucking down operation, the operation was retried

by the maximum number of times but the operation could not be completed

17 In the chucking up and down operation, the reverse

recovery processing was attempted but it could not be recovered

18 In the chucking up operation, the operation was retried by

the maximum number of times but the operation could not be completed

20 Loading operation time-out (Table does not move to the

target position within the specified time)

22 As the chuck was in the ex-open status at the initialization,

the closing was attempted but could not be completed

The 5th and 6th digit from the left indicates: (Present status display)

The 5th and 6th digit from the left indicates which operating status when an error occurred is indicated.

Display Status

01 Open completion status 02 From open status, the movement to chucking down position

is under way

03 From chucking down position, the open operation is under

way 04 Chucking down completion status 10 The chucking down operation is under way 11 The chucking up operation is under way 12 Close completion status 13 From close status, the ex-open operation is under way 14 From ex-open status, the close operation is under way 18 Ex-pen completion status

18

HCD-GX255/RG170/RG470

The 7th and 8th digit from the left indicates: (Motor status display)

The 7th and 8th digit from the left indicates which motor output status when an error occurred is indicated.

Display Status

× 0 No table motor output × 1Table motor forward output × 2Table motor backward output × 3Table motor break output

0 × No loading motor output 1 × Loading motor forward output 2 × Loading motor backward output 3 × Loading motor break output

The 9th and 10 th digit from the left indicates: (Tray status display)

The 9th and 10th digit from the left indicates which target processing when an error occurred is indicated.

Display Status

01 Open operation 12 Close operation 18 Ex-open operation

2. Optical Pick-up Error Code Mode

When this mode is entered, optical pick-up error code is displayed with the 8-character format on the fluorescent indicator tube.

The first digit from the left indicates:

The first digit from the left indicates which mode the error history is. In the optical pick-up error code mode, “D” is displayed on the fluorescent indicator tube.

The second digit from the left indicates: (Error history No. display)

The second digit from the left indicates which order the error history is. “1” indicates the latest error history, and each time the number increases by one, the error history goes back to one-previous error .

The 5th and 6th digit from the left indicates: (Error step display)

The 5th and 6th digit from the left indicates which processing when a trouble occurred

Display Contents

01 Power OFF in progress 02 Initialize in progress 03 Oscillation stopping 04 From oscillation stop, oscillation starting 05 Stopping 06 Stop operation is under way 07 Start operation in progress 08 TOC read in progress 09 Search operation is under way 0A Playback operation is under way 0B Pause operation is under way 0C Playback manual search operation is under way 0D Pause manual search operation is under way 0E —

The 7th and 8th digit from the left indicates:

The 7th and 8th digit from the left indicates which operation in progress when a trouble occurred. (Step of each processing of the 5th and 6th digits is indicated)

5 REPEAT LIMIT CANCEL MODE

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

Procedure:

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

2. Press the [CD] button to select “CD”.

3. Press three buttons of x , [CD] and [PLAY MODE/TUNING MODE] simultaneously.

4. The message “LIMIT OFF” is displayed on the fluorescent indicator tube momentarily, CD repeat 5 limit is cancelled.

The third and 4th digit from the left indicates: (Error status display)

The third and 4th digit from the left indicates which error status is indicated.

Display Status

01 Not focused (TOC read without a disc) 02 GFS NG (TOC read with a disc chucked) 03 Start operation time-over 04 Defocused continuously (Defocused during TOC reading) 05 Q code not entered for specified time 06 Tracking not turned ON 07 Blank disc (Blank disc TOC read)

19

HCD-GX255/RG170/RG470

e

p

SECTION 5

ELECTRICAL ADJUSTMENTS

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

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

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

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

• Abbreviation MX: Mexican model

S-CURVE CHECK

CD board (except MX) BD board (MX)

TP(FE) TP(VC)

Procedure:

1. Connect an oscilloscope to TP (FE) and TP (VC) on the CD board (except MX) or BD board (MX).

2. Press the I/1 button to turn the power on.

3. Load the disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the f ocus search)

4. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak le vel within 3 ± 0.5 Vp-p.

oscilloscop

RF signal waveform

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

level : 1.3

±

0.3 Vp-

– CD BOARD (Conductor Side) (except MX) – – BD BOARD (Conductor Side) (MX) –

TP

(VC)

S-curve waveform

symmetry

A

±

within 3

B

Note: • Try to measure several times to make sure than the ratio of A : B

or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

0.5 Vp-

Connecting Location: CD board (except MX)

BD board (MX)

RFAC LEVEL CHECK

CD board (except MX) BD board (MX)

TP(RFACO) TP(VC)

Procedure:

1. Connect an oscilloscope to TP (RF ACO) and TP (VC) on the CD board (except MX) or BD board (MX).

2. Press the I/1 button to turn the power on.

3. Load the disc (YEDS-18) and playback.

4. Confirm that oscilloscope waveform is clear and check if RF A C signal level is correct or not.

Note: Clear RFAC signal wavef orm means that the shape “ ◊ ” can be clearly

distinguished at the center of the waveform.

oscilloscope

TP

(FE)

IC101

TP

(RFACO)

Connecting Location: CD board (except MX)

BD board (MX)

20

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM – CD SERVO Section –

HCD-GX255/RG170/RG470

DETECTOR

A

B

C

D

F

E

OPTICAL PICK-UP

BLOCK

(KSM-215DCP)

LASER DIODE

PD

I-V AMP

LD

CD +3V

AUTOMATIC

POWER

CONTROL

Q10

CD DSP

IC101 (1/2) (EXCEPT MX)

IC101 (1/2) (MX)

A

26

B

27

C

28

D

29

F

20

E

19

LD

36

SUMMING

FOCUS

ERROR

TRACKING

ERROR AMP

APC LD

AMP

RF

AMP

AC_

SUM

FEO

TEO

EQ_

IN

34

24

22

PD

37

RFAC

35

VCA

RFACO

EQ

41

42

45

46

RFACI

ASYI

ASYO

DIGITAL

CLV

PROCESSOR

MDP

6

ASYMMETRY

CORRECTOR

XRST

100

FILTER

51 53

FILI

PCO

FILO

CLTV

DIGITAL PLL

TO SERVO AUTO

SEQUENCER

CPU INTERFACE

DATA

CLOCK

XLAT

31

33 45

32 19

1125052

XPCK

SCOR

SENS

SBSO

98 99115107102 105 104 110 111

SCOR

SBSO

EFM

DEMODULATOR

SUBCODE

PROCESSOR

SQCK

SQSO

EXCK

96 97

EXCK

WFCK

XUGF

INTERNAL BUS

GFS

EMPH

68

113

32K

RAM

ERROR

CORRECTOR

D/A

DIGITAL

INTERFACE

117 93

C4M

GENERATOR

D/A

CONVERTER

SELECTOR

LRCK

BCK

PCMD

63 66 65

XTSL

CLOCK

LRCKI

BCKI

62 60 61

PCMDI

XTAO

XTAI

XTACN

AOUT1

AOUT2

77

78

95

81

86

R-CH

X171

16.9344MHz

SCOR, SBSO,

EXCK, WFCK

CD-L

A

B

(Page 22)

2-AXIS

DEVICE

(TRACKING)

(FOCUS)

M101

(SPINDLE)

M102

(SLED)

O-XLT

I-SCOR

47

O-CD-DATA

O-XRST

O-CD-CLK

I-CD-SENS

SYSTEM CONTROLLER

IC901 (1/4) (SUFFIX-11) IC901 (1/4) (SUFFIX-12)

MOTOR/COIL DRIVE

IC251 (EXCEPT MX)

IC251 (MX)

CH4OUTF

16

M

15

17

18

14

13

12

11

CH4OUTF

CH3OUTF

CH3OUTR

CH1OUTF

CH1OUTR

CH2OUTF

CH2OUTR

MOTOR

DRIVE

MOTOR

DRIVE

MUTE

COIL

20

CH4IN

CH3FIN

CH3RIN

CH1FIN

CH1RIN

CH2FIN

CH2RIN

(MX)

SWITCHING

IC501

(EXCEPT MX)

OPIN+

24

23

21

4

5

7

OPOUT

27

9

10

11

12

13

14

2

CD DSP

IC101 (2/2) (EXCEPT MX)

IC101 (2/2) (MX)

SFDR

SRDR

TFDR

TRDR

FFDR

FRDR

PWM GENERATOR

FOCUS/TRACKING/SLED

S101

(LIMIT)

21 23

FEI

TEI

A/D

CONVERTER

FOCUS/

TRACKING/SLED

SERVO DSP

SSTP

7

MIRR,

DFCT, FOK

DETECTOR

SERVO

INTERFACE

SERVO AUTO

SEQUENCER

TO CPU INTERFACE

FOK

MIRR

DFCT

COUT

SCLK

3 1 2

119

108

I-MP3-DI

O-MP3-DATA

O-MP3-CLK

O-MP3-CS I-MP3-ACK I-MP3-REQ

O-MP3-LP

O-MP3-RESET

O-MP3-STB

O-XTCN

I-E-1 – I-E-3

29 30 28 39 40 43 44 38 42

34

49O-LM-F 48O-LM-R

51O-TM-F 50O-TM-R

73I-CD-NUMBER-SENS

56I-OPEN-SW

52 – 54

MIDIO

6

MICK

7

MICS

4

MIACK

8

PO11/BUCK/AD14

36

MILP

5

RESET

2 3

STANDBY

LOADING MOTOR DRIVE

IC701

7 FIN 9 RIN

TABLE MOTOR DRIVE

IC712

7 FIN 9 RIN

LEVEL SHIFT

Q731

ROTARY

ENCODER

S711

ADDRESS DETECT

OPEN

CLOSE

4OUT1 2OUT2

TABLE ADDRESS

SENSOR

IC731

DISC TRAY

OPEN/CLOSE

DETECT

M

S751

16

19

18 14

SBSY/BCKIB

SFSY/LRCKIB

M751

(LOADING)

M741

(TABLE)

15

SDI0

BCKIA

LRCKIA

MP3 DECODER

IC301 (EXCEPT MX)

IC301 (MX)

11

SDO0

• Abbreviation MX : Mexican model

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: CD PLAY

: VIDEO

HCD-GX255/RG170/RG470

2121

HCD-GX255/RG170/RG470

6-2. BLOCK DIAGRAM – AUDIO/VIDEO Section –

(Page 23)

(Page 21)

E

A

HP1

(PB)

(DECK-A)

(MX)

JK801 MIC 1

JK802 MIC 2

JK802

MIC

(E2, E51, AR)

J751

AUDIO IN

HP IN

CD-L

L-CH

R-CH R-CH

FM 75Ω

COAXIAL

AM

+9V

(E2, E51, AR)

R-CH

FM/AM TUNER PACK

FM ANT

ANT GND

AM ANT

ANT GND

LC72121 DI

LC72121 DO

LC72121 CLK

LC72121 CE

BIAS OSC

L201

TUNER-L

TUNER-R

TUNED

STEREO

TU MUTE

RDS DATA

RDS CLK

MUTING

Q801

R-CH

CLK

TUNED

STEREO

TU-MUTING

R-D

R-C

(AEP, EE)

MIC AMP

IC801 (1/2)

VR851

ECHO LEVEL

DO

DI

CE

MIC LEVEL

MIC IN

HP/AUX IN

VR801

ECHO AMP

IC802

MIC AMP

IC801 (2/2)

(MX)

63

1

61

3

7

9

11

MD L

CD L

TUNER L

TAPE L

PB OUT1

TAPE A1 TAPE B1

58

MIC

TONE OUT1

37

INPUT SELECT, TONE CONTROL,

ELECTRICAL VOLUME

IC101 (SUFFIX-11) IC101 (SUFFIX-12)

SI

SC

19

18

36

AMS OUT

40

VIN1

SAOUT1

55

35

BBIN1

VOL OUT1

REC OUT1

(MX)

DBFB

VOL OUT1

SBSO WFCK SCOR EXCK

G

C

SCHMIT

TRIGGER

IC1005

D-RAM IC1002

DQ1 – DQ4

A0 – A7

WE

OE RAS CAS

(Page 23)

1, 2, 24, 259 – 12, 14 – 17

3

22

4

23

B

(Page 21)

R-CH

FEED BACK

SWITCH

Q141

33

CD GRAPHICS

DECODER

IC1001

6

VIDEO AMP

VIDEO MUTING

14.31818 MHz

NTSC/PAL

SWITCH

Q1001

LEVEL SHIFT Q1005, 1009

LEVEL SHIFT Q1002, 1006

3 5 4 2

25, 27, 29, 3015 – 22

13 28 14 26

DATA SFSY SBSY CLCK

VD0 – VD3

VA0 – VA7

WE OE RAS CAS

VOUT

XO1

GDET

DEN

MUTE

RESET

44

5960XI1

37

52

54

• Abbreviation

AR : Argentina model E2 : 120V AC Area in E model E51 : Chilean and Peruvian models EE : East European model MX : Mexican model

• R-ch is omitted due to same as L-ch.

IC1006

Q1010

X1002

J803

VIDEO OUT

VMUTE

CDG-DET

CDG/_BGC

MUTE_DATA

CDG-RST

• SIGNAL PATH

: TUNER

: CD PLAY

: TAPE PLAY (DECK-A)

: TAPE PLAY (DECK-B)

: REC

: AUX IN

15

: MIC

: VIDEO

L-CH

HRPE1

(REC/PB/ERASE)

(DECK-B)

R-CH R-CH

ERASE

HCD-GX255/RG170/RG470

PB MUTING

Q209

R-CH

REC MUTING

Q205, 207

Q203

90

O-REC/PB

R-CH

BIAS OSC

Q201

REC BIAS

SWITCH

Q231, 232

91

O-BIAS

+9V

DI

DO

CLK

66

65

67

I-LC72121-DI

O-LC72121-DO

O-LC72121-CLK

CE

TUNED

STEREO

68

69

70

I-TUNED

I-STEREO

O-LC72121-CE

R-D

TU-MUTING

71

72

O-ST-MUTE

(AEP, EE)

R-C

18

I-RDS-CLK

I-RDS-DATA

MIC IN

HP/AUDIO IN

82

81

I-MIC

I-HP/AUDIO IN

1

2

92

O-BD3401-CLK

O-BD3401-DATA

BAND-PASS

FILTER

Q111, 112

D923 D921

93

I-STREAM

I-TAPE-AMS

94

2222

I-VACS

SYSTEM CONTROLLER

IC901 (2/4) (SUFFIX-11) IC901 (2/4) (SUFFIX-12)

(MX)

VMUTE

CDG-DET

63

60

O-VMUTE

CDG/_BGC

MUTE_DATA

59

57

58

I-CDG-DET

I-CDG-BGC

I-CDG-MUTE-DATA

CDG-RST

0-CDG-RST

86

85

O-MOTOR

87

O-B-SOL

O-A-SOL

CAPSTAN/REEL

MOTOR DRIVE

Q341, 342

PLUNGER DRIVE

(DECK-A)

Q345, 346

PLUNGER DRIVE

(DECK-B)

Q343, 344

I-TAPE-A-STAT

I-TAPE-B-STAT

I-REEL-A

I-REEL-B

TAPE MECHANISM

DECK BLOCK

MM

(CAPSTAN/REEL)

(DECK-A)

(DECK-B)

A-HALF

A-MODE

88

89

83

84

REC (REW)

B-HALF

B-MODE

REC (FWD)

A-PHOTO

B-PHOTO

6-3. BLOCK DIAGRAM – AMP Section –

HCD-GX255/RG170/RG470

(Page 22)

G

C

DBFB

VOL OUT1

(RG170: AEP, EE, RU)

BUFFER

IC251 (SUFFIX-11) IC251 (SUFFIX-12)

GX255/RG170: E2, E3, E51, EA, AR, AUS/RG470

MUTING

Q251

MUTING

CONTROL

Q261

IC441 (RG470: AEP, EE, RU)

IC441 (RG470: E2, E51, AR, MX)

R-CH

IC441 (GX255/RG170)

POWER AMP

STANDBY

SWITCH

Q489

AMP ON/OFF

Q933

LEVEL SHIFT

Q490, 491

(RG470: E2, E51, AR, MX)

R-CH

OVER LOAD

DETECT

Q441

+

R-CH

DC DETECT

Q481, 482

+

TEMPERATURE

DETECT

Q483, 484

+

TH441

PROTECTOR

R-CH

Q485

RELAY DRIVE

Q486

R-CH

RY B+

RY441

RELAY

SWITCH

Q488

R-CH

D035

(RG470)

R-CH

FAN ON/OFF

Q044

HP IN

JK441

+ –

FAN DETECT

Q045

L

R

MM

(Page 22)

E

J701

PHONES

FRONT SPEAKER

IMPEDANCE

USE 6 – 16Ω

M001 (FAN)

23

O-SYS-MUTE

24

O-STK-MUTE

GX255/RG170/ RG470: AEP, EE, RU

SYSTEM CONTROLLER

IC901 (3/4) (SUFFIX-11) IC901 (3/4) (SUFFIX-12)

PROTECT

DETECT

Q487

+

95

I-PROTECTOR

• Abbreviation

AR : Argentina model AUS: Australian model E2 : 120V AC Area in E model E3 : 120V AC Area in E model E51 : Chilean and Peruvian models EA : Saudi Arabia model EE : East European model MX : Mexican model RU : Russian model

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER

HCD-GX255/RG170/RG470

2323

HCD-GX255/RG170/RG470

6-4. BLOCK DIAGRAM – PANEL, POWER SUPPLY Section –

FL701

FLUORESCENT

INDICATOR

TUBE

D601 – 606

(FRONT PANEL LED)

S611 – 617, S621 – 626, S631 – 638,

S641 – 646, 648,

SW601

LED DRIVE

Q601 – 606

FL/LED DRIVER

S1 – S21

61 – 67

45 – 58,

G1 – G13

68 – 80

STREAN LED1 – STREAN LED6

26 – 31

KEY1 – KEY4

19 – 22

IC701

STANDBY

S601, 602

S660

VOLUME

9

SO1

8SI1 7SCK1

16CE

6RESET

4

X2

X1

3

D611

REMOTE CONTROL

RECEIVER

IC610

ROTARY

ENCODER

X701

4.19MHz

SYSTEM CONTROLLER

IC901 (4/4) (SUFFIX-11) IC901 (4/4) (SUFFIX-12)

36 I-VFD-DATA 35 O-VFD-DATA 37 O-VFD-CLK

4 O-VFD-CE 3 O-VFD-RESET

22

O-STBY-LED

I-SIRCS-IN

7

74 I-KEY0 97 I-POWER, DISPLAY

6 I-VOL-A

21 I-VOL-B

O-CDG-POWER

O-FRONT-SP-RELAY

I-AC-PULSE

I-RESET

I-AC-CUT

O-POWER-RELAY

• Abbreviation

(MX)

CDG +5V

61

(RG470)

FAN B+

27

20

12

5

26

RESET SWITCH

Q901

+5V

REGULATOR

IC1003

MP3 +1.5V

VOLTAGE DETECT

IC902 (SUFFIX-11) IC902 (SUFFIX-12)

REGULATOR

Q043

IC303 (EXCEPT MX)

VREF, VDD

B+ SWITCH

Q1007, 1008

M+7V

M+9V

+1.5V

REGULATOR

IC303 (MX)

VCC

D301, 302

RY B+

+3.3V

D902

D903

+9V

+9V REGULATOR

IC021 (SUFFIX-11) IC021 (SUFFIX-12)

B+ SWITCH

Q041, 042

+9V REGULATOR

IC011 (SUFFIX-11) IC011 (SUFFIX-12)

+16V

(GX255/RG170/RG470: AEP, EE, RU)

AMP B+

AMP B–

AMP +VL

AMP –VL

AMP +VH

AMP –VH

(RG470: E2, E51, AR, MX)

Q902

UNREG

+3.3V REGULATOR

IC006 (SUFFIX-11) IC006 (SUFFIX-12)

EVER +10V

REGULATOR

Q903, 904

RECT D401

RECT D402

RECT D401

VP

D006

RECT

D021 – 024

RECT

D011 – 014

REGULATOR

RECT

D007, 008

RECT

D001 – 004

RECT

D902 – 905

B–

Q902

AR : Argentina model E2 : 120V AC Area in E model E3 : 240V AC Area in E model E51 : Chilean and Peruvian models EA : Saudi Arabia model EE : East European model MX : Mexican model RU : Russian model

MAIN POWER

TRANSFORMER

PT901

F907

F904

F905

F908

F909

D908

VF1

VF2

F906

SUB POWER

TRANSFORMER

PT902

(EXCEPT E2, E3, E51, EA)

(E2, E3, E51, EA)

S901

VOLTAGE

SELECTOR

240V

220V

120V

(EXCEPT E2, E3, E51, EA)

RY901

RELAY DRIVE

Q002

W001

(AC IN)

HCD-GX255/RG170/RG470

2424

HCD-GX255/RG170/RG470

d

• Circuit Boards Location• Note For Printed Wiring Boards and Schematic Diagrams

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• f : internal component.

• : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

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

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

• Indication of transistor

C Q

B

E

B

These are omitted.

Q

CE

These are omitted.

Note on Schematic Diagram:

• 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/ specified.

• f : internal component.

• 2 : nonflammable resistor.

• 5 : fusible resistor.

• C : panel designation.

Note:

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

• A : B+ Line.

• B : B– Line.

• Voltages and waveforms are dc with respect to ground

under no-signal conditions. – CD/BD Section – no mark :CD PLAY – CD-G Section – no mark : CD-G PLAY – Other Sections – no mark : FM (): CD PLAY 〈〈 〉〉 : TAPE PLAY []: TAPE REC

∗ : Impossible to measure

• Voltages are taken with a 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/AM) E : TAPE PLAY (DECK A) d : TAPE PLAY (DECK B) G : REC J : CD PLAY f : AUX IN N : MIC L : VIDEO

• Abbreviation AR : Argentina model AUS: Australian model CND : Canadian model E2 : 120 V AC Area in E model E3 : 240 V AC Area in E model E51 : Chilean and Peruvian models EA : Saudi Arabia model EE : East European model MX : Mexican model RU : Russian model

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 pièce portant le numéro spécifié.

MOTOR (LD) board

MIC board (E2, E51, AR, MX)

AC1 board (GX255/RG170/RG470: AEP, EE, RU)

PANEL board

VOL board

CD-G board (MX)

BD board (MX)/ CD board (EXCEPT MX)

SW board

SENSOR board

DRIVER board

MOTOR (TB) boar

SUB TRANS board

VIDEO OUT board (MX)

TRANSFORMER board

MAIN board

HCD-GX255/RG170/RG470

POWER board

AUDIO IN board

HEADPHONE board

MAIN board

2525

HCD-GX255/RG170/RG470

6-5. PRINTED WIRING BOARD – CD Board – (Except MX model)

1 2 3 4 5 6 7 8 9

A

CD BOARD

(COMPONENT SIDE)

R121

C123

C195

R352 R353

C501 R501

B

C

D

FB301

R201

R205

C201

C203

C302

C303

C305

C210

R313

C315 C316

C314

C312

R162

165

R

X171

R405

351

R

R354

R302

C308

R191

R173

C174

C196

C172

R172

171

C171

R

C134

C125

C318

C184

C183

C182

C209

C151

• See page 25 for Circuit Boards Location.

C255

IC501

C257

C258

C259

C14

C10

C15

11

12

R

C18

R

C11

C16

R13

Q10

R10

E

C260

R253

C116

C12

C13

C17

1-860-502-

: Uses unleaded solder.

CD BOARD

(CONDUCTOR SIDE)

252

C

IC251

R252

C251

TP (VC)

C113

R113

C112 C111

114

R

TP (FE)

PICK-UP BLOCK

112

R

CN101

OPTICAL

(KSM-215DCP)

C114

251 R

13

(13)

C320

C115

R111

M101

(SPINDLE)

M

S101

(LIMIT)

R

C307

C309

411

C122

TP (RFACO)

C306

17

307 R

IC301

32

R303

R407

IC101

C124

R132

C163

IC303

13

54

R404

R403

R419

C313

116

4833

C310

C212

R163

132 C

C133

141 R

143

R133

R

131

C131

R

R301

64

R306

49

R409

C211

C143

R142

C141

C142

C311

C194

C162

C181

C161

R

C317

R305

R402

R401

C213

410 R

408 R

R412

R406

182 R

181 R

161

R

151

R203

M102

M

(SLED)

C186

R204

CN201

185 C

CN202

1-860-502-

(SUFFIX-11)

MAIN BOARD

A1

CN301

(Page 32)

MAIN BOARD

A3

CN301

(Page 36)

(SUFFIX-12)

13

(13)

E

HCD-GX255/RG170/RG470

2626

HCD-GX255/RG170/RG470

6-6. SCHEMATIC DIAGRAM – CD Board – (Except MX model)

R307

C307

0.1

10k

MP3REQ

R303 100k

C310

0.1

(SUFFIX-11)

(Page 35)

(Page 39)

(SUFFIX-12)

FB301

C314

TP433

MP3VDD

WE/SDO1

SDO2

CS/RAS/

PO12

AD15/CAS/

PIO7/BUS3/IO7

SDO3/OE

PO9/AD12

PO08/AD11

VDDM

SRMSTB

VDDT

AD10

AD9

AD8

PO07/AD7

PO06/AD6

PO05 AD5/

47 4V

CN201

27P

M+7V

M-GND

MP3-STB

MP3-REQ

MP3-ACK

MP3-CLK

MP3-DIO

MP3-LP

MP3-CS

MP3(3.3V)

MP3-RST

MP3-GND

SCOR

CD-SENS

CD-CLK

XLT

CD-DATA

XRST

XTCN

AVDD(3.3V)

R-CH

A-GND

L-CH

D-GND

DOUT

DVDD(3.3V)

PIO6/FI3/BUS2/IO7

PIO4/FI1/BUS0/IO4

PIO5/FI2/BUS1/IO5

PO11/BUCK/AD14

PO10/CCE/AD13

AD0/PO00

AD1/PO01

AD3/PO03

AD2/PO02

AD4/PO04

C312C313

C311 C309

0.10.1

0.1 0.1

VOUT

C305 TP422

C302 C303

220

0.1 0.1 4V

TP186

TP187

TP401

TP402

TP403

TP404

TP405

TP406

TP407

TP408

R205

TP417

TP416

TP415

TP414

TP413

TP412

TP419

TP434

TP410

TP411

TP409

R204

PIO3/IO3

PIO2/IO2

MP3 DECODER

TC94A34FG-002

VDD

VSS

C308

47 4V

STBY

NC

MVDD

MGND

MP3STB

MP3REQ

MIACK

MICK

MIDIO

MILP

MICS

MP3RST

0

SCOR

SENS

CLK

XLT

DATA

XRST

XTCN

AVDD

ROUT

LOUT

DOUT

PIO0/SDI2/IO0

PIO1/SDI3/IO1

IC301

VDDX

CKO/PO13/AD16

R306

VIN

GND

VSS

XO

0

IRQ/FIO

CKI/CLOCK/

XI

+1.5V REGULATOR

TXO

VDD

TEST

VSSX

IC303

BH15FB1WG

R411

R410

R409

R408

R407

R406

R412

SBSY/BCKIB

SFSY/LRCKIB

IMD

VSSP

M

MP3GND

MP3STB

MP3REQ

MIACK

MIDIO

MP3RST

100

SDI1/

DATA

LRCKIA

BCKIA

SDI0

LRCKO

BCKO

SDO0

MICK

MILP

MICS

STANBY

VCOI

CLOCK

XTACN

MIACK

RESET

R313

VSS

VDDT

MICK

MIDIO

MILP

MICS

VDDP

220

C316C315

0.00220.1

SCOR

C212

SENS

22p

XLT

C211

DATA

220p

XRST

AOUT2

AOUT1

C306

R405

R404

R419

R403

R402

R401

R301 100k

R305 100k

C317

0.01

DOUT

• See page 60 for Waveforms. • See page 61 for IC Block Diagrams.

C142

C151

R203

0

R354

100

R352

100

R351

100

0.1

MIACK

100

MICK

100

MIDIO

MILP

100

MICS

100

MP3STB

100

MP3RST

100

C318

0.01

C213

22p

C320

0

TP435

DVDD

R353

100

10k

R302

R201

AVDD

TP436

C161

0.1

C181

0.1

0

R173

C185 470p

C182

0.1

C186 470p

C201

100 10V

AGND

TP420

C209

0.01

DOUT

C171 R171

22p 470

C172

27p

AOUT1

AOUT2

DGND

TP421

TP427

PCMDI

TP103

LRCK

TP104

PCMD

TP105

BCK

R161

100

C174X171

R172

1M

C183

R181

22

100

6.3V

C184

R182

22

100

6.3V

C203

C162

100

0.1 10V

BCKI

PCMDI

LRCKI

LRCK

VSS

PCMD

BCK

VDD

EMPH

EMPHI

IOVDD2

DOUT

TEST

TEST1

IOVSS2

NC

0.116.9344MHz

XVSS

XTAO

XTAI

XVDD

AVDD1

AOUT1

VREFL

AVSS1

AVSS2

VREFR

AOUT2

AVDD2

NC

IOVDD0

RMUT

LMUT

IC501

C143

100

0.1

10V

R151

0

NC

DDCR

XTSL

NC

R165

0

C501

0.1

R501

100

C141

R141

4.7k

AVSS5

AVDD5

VROUT DVRSEN D

DD

SQCK

SQSO

IOVSS0

XTACN

R162

47k

C210

0.1

C194

0.1

N C A T X

GND

VCCSWITCHING

C131

1500p

R143

3.3k

0.1

1k

R142

FILI

PCO

FILO

CLTV

AVSS3

DATA

SYSM

XRST

EXCK

SBSO

0.1

C163

C196

100

0.1

R163

T

A T

S

A

R X

D

MDP

C125 R121

0.1 15k

C133

0.01

R133 180k

0.47

R132

10k

C132

O

ASYI

VCTL

VPC

ASYO

CD DSP

IC101

CXD3059AR

VDD

CLOCK

VSS

XLAT

K

S

C

N

O

T

E

L

C

S

X

100p

BIAS

SENS

R131C134

1M0.1

TP125

AVDD3

SCLK

R191

0

MOTOR/COIL

DRIVE

IC251

BA5947FM

RFACI

ATSK

TP

(RFACO)

RFACO

WFCK

330p

C124

AVSS4

XUGF

C122C123

0.10.1

LD

PD

NC

RFC

EG_IN

VDD

SCOR

C2PO

GFS

XPCK

R O

C S

JPO004C251R252R251

MDP6800p22k10k

SW

OPIN-

OPIN+

OUTVREF

OPOUT

PREVCC

R

FD T

AC_SUM

C4M

R D R T

CH1FIN

CH4CAPA

PDSENS

DCK W

CH1RIN

CH4IN

NC

FDCO

AVDD4

R

D

C

B

A

VC

FEO

FEI

TEO

TEI

F

E

NC

AVSS0

AVDD0

IOVDD1

FRDR

FFDR

TRDR

TFDR

SRDR

SFDR

IOVSS1

SSTP

MDP

LOCK

VSS

FOK

DFCT

MIRR

COUT

NC

R

D

FR

FF

CH2FIN

CH2RIN

3FIN

CH

CH3RIN

R

D R

FD S

S

JPO10 R11

APC 0

R253TP418

10kGAIN_SW

C259

0.1

TP423

IOP1

C17 220

4V

R111

1k

TP

(FE)

R113

1k

JPO103

TP428

TP429

TP430

TP431

TP425

TP432

D

GN

CNF4

MUTE

GND

AUTOMATIC

C18

1000p

R112

TEI

R114

FRDR

FFDR

TRDR

TFDR

SW+

MDP

F-

VCC

POW

VCC

POW

2SB1690K

POWER

CONTROL

CH2OUTR

CH3OUTR

C16R12

Q10

15k

F+T+T

1100k

CH2OUTF

3OUTF

CH

+

R10

3.3

C111

C112

C113

C114

C115

0.1

T-

CH1OUTR

CH4OUTF

R13

CH1OUTF

CH4OUTR

1

TP424

IOP2

D

C

B

A

3300p

470p

3300p

470p

F

E

FRDR

FFDR

TRDR

TFDR

SRDR

SFDR

MDP

C15

C10

0.1

10

E

C11

10

D

A

B

C

F

TP102

F+

C14

0.1 T-

C116

C195

0.1

C258

0.1

C257

0.1

C252

0.1

C255

0.1

C260

220 10V

F-

100 10V

TP

(VC)

SP-

TP250

SP+

TP251

SL+

TP252

SL-

TP253

VC

VCC

E

TP10

TP11

TP12

TP13

TP14

D

A

B

C

F

AGND

F

LD

VR

PD

TP15

F+

TP16

T+

F-

TP17

T-

TP18

F-

TP19

CN101

16P

TP426

SW-

S101

(LIMIT)

M101

(SPINDLE)

M102

(SLED)

HCD-GX255/RG170/RG470

2727

HCD-GX255/RG170/RG470

6-7. PRINTED WIRING BOARD – BD Board – (MX model only)

1 2 3 4 5 6 7 8 9

A

BD BOARD

(COMPONENT SIDE)

R162

C314

C174

R313

R302

C312

C308

R191

R173

C196

C172

R172

171

C171

R

C134

C195

C125

R121

C123

B

C

D

FB301

R205

R201

C201

C203

C302

C305

C303

C315

C184

C183

C182

C151

C209

C318

X171

C210

C316

165

R

• See page 25 for Circuit Boards Location.

C255

C257

C260

C258

C259

C10

C11

C15

C18

C16

E

Q10

R253

C116

C14

12

11

R

C17

R13

R10

1-864-566-

: Uses unleaded solder.

M101

M

C320

R353

R354

R352

(SPINDLE)

C307

R411

R351

17

R307

32

C309

C122

TP (RFACO)

16

IC301

S101

(LIMIT)

C306

R303

R407

IC101

C124

13

IC303

54

R406

R412

R142

C141

R408

R203

C213

C162

C194

C181

C161

R151

R301

1-864-566-

R401

C317

R305

R402

R182

R161

M102

M

(SLED)

CN201

C186

C185

R181

R204

421 R

R422

R423

11

(11)

(SUFFIX-11)

A2

A4

(SUFFIX-12)

MAIN BOARD

CN301

(Page 32)

MAIN BOARD

CN301

(Page 36)

R405

R403

R404

R419

C313

1

R306

64

C310

132 R

C311

49

R410

4833

R409

R163

C211

C212

C163

C143

141

C133

R

C132

143

R133

R

C142

131

C131

R

BD BOARD

(CONDUCTOR SIDE)

C251

IC251

112

R

CN101

OPTICAL

C115

R111

TP (VC)

114

113

114

R

C

C113

R

TP (FE)

C112 C111

PICK-UP BLOCK

(KSM-215DCP)

C252

252

R

251

R

11

(11)

E

HCD-GX255/RG170/RG470

2828

HCD-GX255/RG170/RG470

6-8. SCHEMATIC DIAGRAM – BD Board – (MX model)

C307

R307

10k

0.1

MP3REQ

R303 100k

C310

0.1

(SUFFIX-11)

A2

MAIN BOARD

(3/3)

CN301

(Page 35)

A4

MAIN BOARD

(3/3)

CN301

(Page 39)

(SUFFIX-12)

WE/SDO1

SDO2

CS/RAS/

PO12

AD15/CAS/

PIO7/BUS3/IO7

SDO3/OE

PO9/AD12

PO08/AD11

VDDM

SRMSTB

VDDT

AD10

AD9

AD8

PO07/AD7

PO06/AD6

PO05 AD5/

C314

47 4V

TP433

MP3VDD

FB301

CN201

31P

M+7V

M-GND

MP3-STB

MP3-REQ

MP3-ACK

MP3-CLK

MP3-DIO

MP3-LP

MP3-CS

MP3(3.3V)

MP3-RST

MP3-GND

SCOR

CD-SENS

CD-CLK

XLT

CD-DATA

XRST

XTCN

AVDD(3.3V)

R-CH

A-GND

L-CH

D-GND

DOUT

DVDD(3.3V)

D-GND

WFCK

SBSO

EXCK

C311 C309

0.1 0.1

PIO4/FI1/BUS0/IO4

PIO5/FI2/BUS1/IO5

PIO6/FI3/BUS2/IO7

PO11/BUCK/AD14

PO10/CCE/AD13

AD0/PO00

AD3/PO03

AD1/PO01

AD4/PO04

AD2/PO02

C312C313

0.10.1

VOUT

C305 TP422

C302 C303

220

0.1 0.1 4V

TP186

TP187

TP401

TP402

TP403

TP404

TP405

TP406

TP407

TP408

R205

TP417

TP416

TP415

TP414

TP413

TP412

TP419

TP434

TP410

TP411

TP409

R204

PIO2/IO2

PIO3/IO3

MP3 DECODER

TC94A34FG-002

VDD

VSS

C308

47 4V

STBY

NC

MVDD

MGND

MP3STB

MP3REQ

MIACK

MICK

MIDIO

MILP

MICS

MP3RST

0

SCOR

SENS

CLK

XLT

DATA

XRST

XTCN

AVDD

ROUT

LOUT

DOUT

0

PIO0/SDI2/IO0

PIO1/SDI3/IO1

IC301

VDDX

CKO/PO13/AD16

VIN

GND

R306

VSS

IRQ/FIO

XO

0

CKI/CLOCK/

XI

+1.5V REGULATOR

VDD

VSSX

IC303

BH15FB1WG

R411

R410

R409

R408

R407

R406

R412

R423

R421

R422

TXO

TEST

SBSY/BCKIB

SFSY/LRCKIB

VSSP

MIMD

MP3GND

MP3STB

MP3REQ

MP3RST

100

SDI1/

MIACK

MIDIO

DATA

MICK

MILP

MICS

LRCKIA

LRCKO

STANBY

VCOI

R313

CLOCK

XTACN

BCKIA

MIACK

MIDIO

RESET

220

SDI0

BCKO

SDO0

VSS

VDDT

MICK

MILP

MICS

VDDP

C316C315

0.00220.1

SCOR

C212

SENS

22p

XLT

C211

DATA

220p

XRST

AOUT2

AOUT1

WFCK

SBSO

EXCK

• See page 60 for Waveforms. • See page 61 for IC Block Diagrams.

R203

0

R354

100

R352

100

R351

100

C306

0.1

R405

100

MIACK

R404

100

MICK

R419

R403

R402

R401

R301 100k

R305 100k

C317

0.01

DOUT

MIDIO

100

MILP

100

MICS

100

MP3STB

100

MP3RST

C318

0.01

C213

22p

C320 1000p

TP435

DVDD

R353

100

10k

R302

R201

AVDD

TP436

C161

0.1

C181

0.1

0

R173

C185 470p

C182

0.1

C186 470p

C201

100 10V

AGND

TP420

C209

0.01

DOUT

C171 R171

22p 470

C172

27p

AOUT1

AOUT2

DGND

TP421

TP427

PCMDI

TP103

LRCK

TP104

PCMD

TP105

BCK

R161

100

C174X171

0.116.9344MHz

R172

1M

C183

R181

22

100

6.3V

C184

R182

22

100

6.3V

C203

C162

100

0.1 10V

C151

100 10V

R151

0

BCKI

NC

PCMDI

LRCKI

LRCK

VSS

PCMD

BCK

VDD

EMPH

EMPHI

IOVDD2

DOUT

TEST

TEST1

IOVSS2

NC

XVSS

XTAO

XTAI

XVDD

AVDD1

AOUT1

VREFL

AVSS1

AVSS2

VREFR

AOUT2

AVDD2

NC

IOVDD0

RMUT

LMUT

NC

R165

0

C163R163

0.1100

ST R X

100p

C133

0.01

R133 180k

R132

10k

VCTL

AVSS3

VSS

DATA

C196

0.1

TA A D

XLT

MDP

C131

R131C134

C125 R121

0.1 15k

0.47

C132

BIAS

ASYI

ASYO

VPCO

AVDD3

CD DSP

IC101

CXD3059AR

SCLK

SENS

VDD

CLOCK

XLAT

R191

CK

S

N LO C

SE

MOTOR/COIL

DRIVE

IC251

BA5947FM

1M0.1

TP125

TP

RFACI

(RFACO)

330p

C124

RFACI

AVSS4

RFACO

XUGF

WFCK

ATSK

0

K

FC W

C122C123

0.10.1

LD

PD

NC

RFC

EG_IN

VDD

SCOR

C2PO

GFS

XPCK

R O

SC

JPO004C251R252R251

MDP6800p22k10k

SW

OPIN-

OPIN+

OUTVREF

OPOUT

PREVCC

FDR T

AC_SUM

C4M

R D R T

CH1FIN

CH4CAPA

PDSENS

WDCK

CH1RIN

CH4IN

NC

RFDCO

AVDD4

D

C

B

A

VC

FEO

FEI

TEO

TEI

F

E

NC

AVSS0

AVDD0

IOVDD1

FRDR

FFDR

TRDR

TFDR

SRDR

SFDR

IOVSS1

SSTP

MDP

LOCK

VSS

FOK

DFCT

MIRR

COUT

NC

R

DR

FR

FFD

CH2FIN

CH2RIN

CH3FIN

CH3RIN

R D

FDR

R

S

C142

1500p

R143

3.3k

C143

0.1 C141

0.1

R141

4.7k

1k

R142

FILI

PCO

FILO

AVDD5

SQCK

CLTV

SYSM

XRST

EXCK

SBSO

K

SO

SB

EXC

DDCR

AVSS5

DDVRSEN

DDVROUT

IOVSS0

SQSO

XTSL

XTACN

R162

47k

C210

0.1

C194

0.1

TACN X

JPO10 R11

APC 0

R253TP418

10kGAIN_SW

C259

0.1

TP423

IOP1

C17 220

4V

1k

R111

(FE)

TP

R113

1k

JPO103

TP428

TP429

TP430

TP431

TP425

TP432

GND

CNF4

MUTE

GND

AUTOMATIC

C18

1000p

R112

TEI

R114

FRDR

FFDR

TRDR

TFDR

SW+

MDP

F-

POWVCC

C16R12

2SB1690K

POWER

CONTROL

CH2OUTR

CH3OUTR

Q10

F+T+T

1100k

15k

+

CH2OUTF

CH3OUTF

R10

3.3

C111

C112

C113

C114

C115

0.1

T

CH1OUTR

CH4OUTF

R13

CH1OUTF

CH4OUTR

C10

C15

10

1

TP424

IOP2

D

C

B

A

3300p

470p

3300p

470p

F

E

FRDR

FFDR

TRDR

TFDR

SRDR

SFDR

MDP

0.1

E

C11

10

D

A

B

C

F

TP102

F+

C14

0.1 T-

C116

C195

0.1

C258

0.1

C257

0.1

C252

0.1

C255

0.1

C260

220 10V

F-

100 10V

TP

(VC)

TP250

SP-

TP251

SP+

TP252

SL+

TP253

SL-

VC

VCC

TP10

E

TP11

TP12

TP13

TP14

E

D

A

B

C

F

AGND

LD

VR

TP15

PD

TP16

F+

TP17

F-

T+

TP18

T-

TP19

F-

CN101

16P

TP426

SW-

S101

(LIMIT)

M101

(SPINDLE)

M102

(SLED)

HCD-GX255/RG170/RG470

2929

HCD-GX255/RG170/RG470

6-9. PRINTED WIRING BOARDS – CHANGER Section –

1 2 3 4 5 6 7

SW BOARD

OPEN/CLOSE

CLOSE

OPEN

A

SENSOR BOARD

AK

IC731

EC

B

1-687-132-

CN731

11

(11)

MOTOR (TB) BOARD

13

CN741

C

M741

(TABLE)

M

D

MOTOR (LD) BOARD

• See page 25 for Circuit Boards Location.

CN751

1 2

S751

DETECT

DRIVER BOARD

12

1-687-669-

CN742

1-687-134-

(12)

CN705

CN702

C751

12

(12)

CN704

R733

R732

R734

R735

C737

E

Q731

C736

: Uses unleaded solder.

R751

C752

JW712

C741

R722

CN703

JW707

JW708

JW709

R721

C735

JW711

JW710

R723

JW706

(SUFFIX-11)

MAIN BOARD

C1

JW705

CN391

(Page 32) (Page 36)

C715

19

R713

R711

D711

R701

D701

R702

R712

19

JW713

C2

CN701

JW704

(SUFFIX-12)

MAIN BOARD

CN391

JW702

JW703

IC712

IC701

JW714

R731

C731

1-866-201-

JW701

11

(11)

HCD-GX255/RG170/RG470

S711

ROTARY ENCODER

DISC TRAY

ADDRESS DETECT

E

F

M751

(LOADING)

M

CN721

2 1

1-687-133-

12

(12)

3030

Sony HCD-GX255, HCD-RG170, HCD-RG470 Service Manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

3-2. CASE (TOP)

3-3. DOOR (CD)

3-4. FRONT PANEL SECTION

3-5. MECHANICAL DECK (CWM43FF13)

3-7. BACK PANEL SECTION

3-8. MAIN BOARD

3-9. BD BOARD/CD BOARD

3-10. DRIVER BOARD, SW BOARD

3-11. OPTICAL PICK-UP (KSM-215DCP)

3-12. SENSOR BOARD

3-13. MOTOR (TB) BOARD

3-14. MOTOR (LD) BOARD

TEST MODE

ELECTRICAL ADJUSTMENTS

DIAGRAMS

6-1. BLOCK DIAGRAM – CD SERVO Section –

6-2. BLOCK DIAGRAM – AUDIO/VIDEO Section –

6-3. BLOCK DIAGRAM – AMP Section –

6-4. BLOCK DIAGRAM – PANEL, POWER SUPPLY Section –

6-5. PRINTED WIRING BOARD – CD Board – (Except MX model)

6-6. SCHEMATIC DIAGRAM – CD Board – (Except MX model)

6-7. PRINTED WIRING BOARD – BD Board – (MX model only)

6-8. SCHEMATIC DIAGRAM – BD Board – (MX model)

6-9. PRINTED WIRING BOARDS – CHANGER Section –