Onkyo CR-305-X Service manual

CD RECEIVER

MODEL CR-305X

CR-305X

Ref.NO.3654

082000

UDD,UDT UPP UGT,UGR

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS MANUAL.

MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FORM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.

Silver models

120 V AC,60 Hz 230 V AC,50 Hz 220 - 230 V AC,50/60Hz

TABLE OF CONTENTS

Specifications ----------------------------------------------------------Caution on replacement of optical pickup -------------------------- Protection of eyes from laser bam during servicing --------------- Service procedures ----------------------------------------------------- Front panel view ------------------------------------------------------ Rear panel view ------------------------------------------------------- Remote controller ---------------------------------------------------- Microprocessor connection diagram -------------------------------- Microprocessor terminal descriptions ------------------------------ IC Block diagram and descriptions --------------------------------- CD Mechanism exploded view -------------------------------------- Replacement of optical pickup --------------------------------------- Chassis exploded view parts list ------------------------------------- Chassis exploded view ----------------------------------------------- Block diagram --------------------------------------------------------- Wiring view ------------------------------------------------------------ Printed circuit board view parts list --------------------------------7 Schematic diagram (Amplifier section) ----------------------------- Printed circuit board view 1------------------------------------------- Schematic diagram (CD & Microprocessor section) ------------- Printed circuit board view 2------------------------------------------- Printed circuit board view 3------------------------------------------- CD Adjustment procedures ------------------------------------------ Clock adjustment procedures ---------------------------------------- Assembling of pad --------------------------------------------------- packing view ---------------------------------------------------------

2 2 3 4 5 6 7 8

9 10 19 21 22 23 25 26 27 29 31 33 35 37 39 40 41 42

CR-305X

SPECIFICATIONS

AMPLIFIER

Power Output:

Dynamic Power: 2 x 24 watts at 4 ohms

Total Harmonic Distortion: 0.2 % at 10 watts output IM Distortion: 0.2 % at 10 watts output

Damping Factor: 25 at 8 ohms

Sensitivity and Impedance: TAPE/CDR/MD IN : 150 mV, 50 kohms Frequency Response: 10 to 50,000 Hz : +0 / –3 dB Acoustic Presence: 1 40 Hz +6.0 dB

Single–to–Noise Ratio: 100 dB (IHF A) Muting –55 dB

CD PLAYER

Signal Readout System: Optical non–contact Reading Rotation: About 500 – 200 r.p.m.

Linear Velocity: 1.2 – 1.4 m / s Error Correction System: Cross Interleave Reed Solomon code D / A Converter: 1 bit Digital Filter: 352.8 kHz 8 times over sampling Number of Channels: 2 (stereo) Frequency Response: 5 Hz – 20 kHz

2 x 20 watts at 4 ohms 1 kHz DIN 2 x 17 watts at 6 ohms 1 kHz DIN

2 x 15 watts at 8 ohms 1 kHz DIN 2 x 20 watts min, RMS at 4 ohms 1 kHz

no more than 1 % THD (FTC rating)

2 x 25 watts at 4 ohms EIAJ

2 x 18 watts at 8 ohms

2 80 Hz +7.5 dB 3 40 Hz +10 dB

80 Hz +8.0 dB

4 40 Hz +10 dB

80 Hz +8.0 dB 10 kHz +4.5 dB

(constant linear velocity)

TUNER

Tuning range

FM: 87.9 to 107.9 MHz (200 kHz steps)

(U.S. & Canadian models)

87.5 to 108.00 MHz (50 kHz steps) (Other area models)

Usable sensitivity

FM: Mono 11.2 dBf,

1.0 µV (75 ohms IHF)

0.9 µV (75 ohms DIN)

Stereo 17.2 dBf,

2.0 µV (75 ohms IHF)

23.0 µV (75 ohms DIN)

50 dB Quieting sensitivity

FM: Mono 17.2 dBf, 2.0 µV (75 ohms)

Stereo 37.2 dBf, 20.0 µV (75 ohms)

Capture ratio

FM: 2.0 dB

Image rejection ratio

FM: 40 dB (U.S. & Canadian models)

85 dB (Other area models)

IF rejection ratio

FM: 90 dB

Signal to noise ratio

FM: Mono 73 dB, IHF

Stereo 67 dB, IHF

Selectivity

FM: 50 dB DIN

(±300 kHz at 40 kHz Devi.) AM Suppression Ratio: 50 dB Harmonic distortion

FM: Mono 0.2%

Stereo 0.3% Frequency response

FM: 30 to 15,000 Hz (±1.5 dB)

Stereo separation

FM: 35 dB at 1,000 Hz

25 dB at 100 to 10,000 Hz Stereo threshold

FM: 17.2 dBf, 2.0 µV (75 ohms)

AM: 530 to 1710 kHz (10 kHz steps)

(U.S. & Canadian models) 522 to 1611 kHz (9 kHz steps) (Other area models)

AM: 30 µV

AM: 40 dB

AM: 0.7 %

GENERAL

Power Supply:

Power Consumption: 60 W (U.S. & Canadian models)

Dimensions:

eight: 4.0 kg (8.8 lbs)

Specifications and features are subject to change without notice Power supply and voltage vary depending on the area in which the unit is

AC 120 V, 60 Hz (U.S. & Canadian models)

(Some Asian models) AC 230 V, 50 Hz (European models) AC 220-230 V, 50/60 Hz (Other area models)

(Some Asian models) 55 W (Other area models) 205 W x 103 H x 362 D mm (8-1/6" x 4-1/16" x 14-1/4")

purchased.

CAUTION ON REPLACEMENT OF OPTICAL PICKUP

The laser diode in the optical pickup block is so sensitive to static electricity, surge current and etc., that the components are liable to be broken down or its reliability remarkably deteriorated.

PRECAUTIONS

1.Ground for the work-desk. Place a conductive sheet such as a sheet of copper

(with impedance lower than 10Mohm) on the workdesk and place the set on the conductive sheet so that the chassis can be grounded.

2.Grounding for the test equipments and tools.

Test equipments and toolings should be grounded in order that their ground level is the same the ground of the power source.

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During repair,carefully take the following precautions. (The following precautions are included in the service parts.)

3. Grounding for the human body. Be sure to put on a wrist-strap for grounding whose other end is grounded. Be particularly careful when the workers wear synthetic fiber clothes, or air is dry.

4. Select a soldering iron that permits no leakage and

have the tip of the iron well-grounded.

5. Do not check the laser diode terminals with the

probe of a circuit tester or oscilloscope.

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CR-305X

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, be sure to follow carefully the instructions below when servicing.

WARNING!!

SERVICE WARNING : DO NOT APPROACH THE LASER EXIT WITH THE EYE TOO CLOSELY.

IN CASE IT IS NECESSARY TO CONFIRM LASER BEAM EMISSION, BE SURE TO OBSERVE FROM A DISTANCE OF MORE THAN 30cm FROM THE SURFACE OF THE OBJECTIVE LENS ON THE OPTICAL PICK-UP BLOCK.

LASER WARNING LABEL

The label shown below are affixed.

1. Warning label

Laser Diode Properties

Material: GaAS/GaALAs Wavelength: 780nm Laser output: max. 0.5mW* Emission Duration: continuous *This output is the value measured at a distance about 1.8mm

from the objective lens surface on the Optical Pick-up Block.

1. Class 1 label

"CLASS 1 LASER PRODUCT"

LUOKAN 1 LASERLAITE

KLASS 1 LASER APPARAT

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CR-305X

SERVICE PROCEDURE

1. Replacing the fuses

This symbol located near the fuse indicates that the fuse used is show operating type, For continued protection against fire hazard, replace with same type fuse , For fuse rating, refer to the marking adjest to the symbol.

Ce symbole indique que le fusible utilise est e lent. Pour une protection permanente, n'utiliser que des fusibles de meme type. Ce demier est indique la qu le present symbol est apposre.

REF.NO.

F901

PART NO.

252157 252083

NOTE : <D, DT> : 120 V model only

<P,GR, GT> : 230 V model only

DESCRIPTION

1.25A-UL/T-237, Fuse <D, DT>

0.4A-SE-EAW, FUSE <P,GR, GT>

2. To initialize the unit

1. Press and the hold down the MEMORY button , then press the After "all lighting " is displayed

2. Press the standby/on button. After " CLEAR " is displayed, the preset memory and each mode stored in the memory, are initialized and will return to the factory settings.

5. Removement of tray

1.Remove the top cover

2.Turn the locked screw to the clockwise to release the lock of gear. (Refer to fig-1)

Fig-1

Bottom side

Lock

Unlock

Front

3.Pull out the tray.

4.Remove the stopper. (Refer to fig-2)

Fig-2

Stopper

3. Safety-check out

(Only U.S.A. model) After correcting the original service problem perform the follwing safety check before releasing the set to the customer Connect the insulating-resistance tester between the plug of power supply cord and terminal GND on the back panel. Specifications: More than 10Mohm at 500V

4. Memory Preservation

This unit does not require memory preservation batteries. A built-in memory power back-up system preserves the contents of the memory during power failures and even when the unit is un-plugged. The unit must be plugged in order to charge the back-up system. The memory preservation period after the unit has been unplugged varies depending on climate and placement of the unit. On the average, memory contents are protected over a period of a few weeks after the last time the unit has been unplugged. This pe-riod is shorter when the unit is exposed to a highly humid cli-mate.

5. Changing the AM band step

With the exception of the worldwide models, a tuning step selector switch is not provided. When you change the band step, change the parts as shown below.

To 10kHz To 9kHz R705 3.3k 10k R706 5.6k open

Tray

Front

5.Press teh tray stopper to the arrow mark direction and remove the tray ass'y. (Refer to fig-3)

Fig-3

Tray stopper

Front

Tray stopper

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CR-305X

DETECTOR SWITCH

CD TRAY OPEN/CLOSE

Q703

Q184-Q186

SYSTEM RESET

CD MUTNG SWITCH

26 SENS2

Q101

CXA1992BR

SERVO AMP

RF SIGNAL PROCESSING

23 XRST

KEY SWITCH

S762 S761 S760 S759 S758 S757

VOLUME

Q704

MOTOR DRIVE IC

SENS 6

SQSO 5

SQCK 4

Q301

CXD2589Q

CD DIGITAL

SIGNAL PROCESSOR

FR FF PLAY STOP OPEN MEMORY

TA7291S

DATA 7

XLAT 8

57 SCOR

79 XRST

STBY

AUTO

/MONO

DISPLAY

STEREO

INPUT<

INPUT>

S756 S755 S754 S753 S752 S751

(FM/AM BAND)

INITIALIZING

AREA 23 22 21 20

AVSS

SD 18 17 16

SQSO

SENS

SQCK 13 12 11 10

XLT

+5V

VDD

10G

GRID

IG - 10G

CLOK 9

U10

TUNER UNIT

P17

+5V

AVDD

P16

PLL

POWER

AVREF

P15

P11-P17

SEGMENT

SIGNAL

252627282930313233343536373839

IN/OUT

SIGNAL

VOLUP

VOLDOWN

STEREO

RESET

DSPMUT

SENS20

CDDATA

CDCLK

3G2G1G

807978777675747372717069686766

Q401

TC9273N-007

RDATA

DETECTOR

XT2

VSS

INPUT SELECTOR

C703

( CLOCK ADJUST)

RCLK

14 CK

RDATA

15 DATA

RCLK

FAILURE

POFF

Q701

MICROPROCESSOR

MPD78045FGF-119-3B9

P14

P13

P12

P11

VLOAD

P10P9P8P7P6

-VP

SEGMENT

TP-01

FREQCAL

P1 - P10

16 ST

( CLOCK ADJUST )

FCE

PLLCE

Q402

SELECTOR IC

ACOUSTIC PRESENCE

13 ST

15 CK

16 DATA

POWERAMP

RDSDATA

RDSSIG

SCOR

RDSCLK

SYSIN

REMIN

SYSOUT

TUMUT

ANGMUT

VDD

POWERCD

LED1

XRST

CDAUTOADJ

OPEN

LED2

Q702

+5V

LED DRIVE

Q601,Q602

POWER AMP SWITCH

Q180

BU1923

RDS DECODER

2 RDATA

16 RCLK

1 QUAL

+5V

Q704

TA7291S

MOTOR DRIVE IC

Q904

POWER

RELAY DRIVE

U751

REMOTE

INITIALIZING

(CD AUTO ADUST ON/OFF)

Q702

BUFFER

SENSOR

Q110,Q111

CD POWER SWTCH

Q181-Q183

TUNER MUTE SWITCH

Q405,Q406

INPUT MUTE SWITCH

Q751

FL TUBE

10-BT-167GK

D782

ACOUSTIC

MICROPROCESSOR CONNECTION DIAGRAM

㧙

PRESENCE

+5V

CD TRAY

OPEN/CLOSE

Description

CR-305X

P11)

㨪

Output pin for power supply control of power amplifier

Data input pin from RDS decoder IC.

Signal input pin from RDS decoder IC.

Sub code frame detection input pin from signal processing IC(CXD2589Q).

Clock input pin from RDS decoder IC.

System code input pin.

Signal input pin for remote controller.

Internal connection pin. Not used.

System code output pin.

Muting control signal output pin for tuner section.

Muting control signal output pin for amplifier section.

Power supply pin.

Output pin for power supply control of CD section.

Acoustic presence indicator (red) control output pin.

Reset signal output pin of signal processing IC and servo IC.

Set pin of self adjustment ON/OFF of CD

CD tray open control output pin.

CD tray close control output pin.

Acoustic presence indicator (green) control output pin.

I/O

Function

POWER AMP

RDSDATA

RDSSIG

SCOR

RDSSCK

414243444546474849505152535455565758596061626364656667686970717273747576777879

NO.

SYSIN

REMINICSYSOUT

OOOIOOOIOOO

TUMUT

ANGMUT

VDD

POWERCD

LED1

XRST

CDAUTOADJ

OPEN

LED2P1P2P3P4P5P6P7P8P9P10

Segment output pins. (P1

Power supply pin for FL tube.

P11

VLOAD

P17)

㨪

Segment output pins. (P12

P12

P13

P14

P15

P16

3G)

㨪

Grid output pins. (1G

P171G2G

Description

10G)

㨪

Grid output pins. (4G

OOOOOOOIOOOIO

I/O

Function4G5G6G7G8G9G

MICROPROCESSOR TERMINAL DESCRIPTION (Q701 : MPD78042GF-3B9)

123456789

NO.

Power supply pin.

Command output pin to transfer the clock signal to signal processing IC(CXD2589Q).

Command output pin to transfer the latch signal to signal processing IC(CXD2589Q).

Command output pin to transfer the data signal to signal processing IC(CXD2589Q).

Sense signal input pin from servo IC(CXA1992)

Digital mute output pin to signal processing IC(CXD2589Q).

Subcode reading clock output pin to signal processing IC(CXD2589Q).

Sense signal input pin from signal processing IC(CXD2589Q).

Subcode data input pin from signal processing IC(CXD2589Q).

System reset input pin.

FM stereo broadcast detection input pin.

Broadcast detection input pin.

Ground pin for A/D converter.

Volume control output pin.

Not used.

Initialization input pin for destination switch.

Input pin for CD tray open/close detection switches.

Signal level input pin for automatic memory.

Operation key connection pin.

10G

SENS

III

SQSO

RESET

VDD

CDCLK

XLT

CDDATA

SENS20

DSPMUT

SQCK

10111213141516171819202122232425262728293031323334353637383940

STEREOSDAVSS

㧙

VOLDOWN

㧙

VOLUP

AREA

IN/OUT

SIGNALK1KO

Power supply pin for A/D converter. I

AVDD

Reference voltage input pin for A/D converter. I

AVREF

Power failure input pin.

Sub clock connection pin. Not used.

Gound pin.

Master clock connection pin.

Serial clock output pin to PLL and function switch ICs (TC9273,TC9162).

Serial data output pin to PLL and function switch ICs(TC9273,TC9162).

Frequency output terminal for clock adjustment

Serial latch output pin to function switch ICs(TC9273,TC9162).

IOI

POFF

XT2

VSSX1X2

OOOOO

RCLK

RDATA

FREQCAL

FCE

Serial latch output pin to PLL IC.

PLLCE

CR-305X

IC BLOCK DIAGRAM AND DESCRIPTIONS

Q101:CXA1992BR (RF Signal Processing Servo Amplifier)

Block Diagram

FE-BIAS

TEO

LPFI

TEI

ATSC

TZC

TDFCT

FZC

LDON

VEE

LEVEL S

VCC

LPCL

FS2

323334353637

LPC

DFCTO IFB1-6

FS1

VCC

VEE

MIRR

TGFL

IIL DATA REGISTER INPUT SHIFT REGISTER ADDRESS DECODER SENS SELECTOR OUTPUT DECODER

FS1-4 TG1-2 BAL1-4 TOG1-4

VCC

Charge

VEE

TGU

SRCH

TG2

MIRR

TG2

DFCT

IIL

↓

TTL

TN1-7 PS1-4

TM3

FSET

CC1

DFCT1

FSET

FOK

CC2

2829

SENS2

IIL

↓

TTL

↓

IIL

CC1

ISET

VCC

TM4

TM6

TM3

TM5

VEE

SENS1

C.OUT

XRST

DATA

XLT

CLK

LOCK

VCC

TM2

ISET

SL-O

SL-M

SL-P

RFTC

RF SUMMING AMP

FO.BIAS WINDOW COMP.

FOK

FOH FOL TGH

TGL BALH BALL ATSC

TZC

FZC

VEE

APC

LASER POWER CONTROL

IFB5

IFB3

IFB4

TRK.GAIN WINDOW COMP

VEE

FE AMP

IFB6

PD1

PD2

3839

PD1 IV

PD2 IV

AMP

F IV AMP

E IV AMP

BAL1

BAL2

BAL3

VEE

TOG1

BAL4

TOG2

TOG3

TOG4

TGFL

VCC

IFB2

IFB1

VEE

E-F BALANCE

WINDOW COMP.

ATSC WINDOW COMP.

TZC COMP.

VCC

DFCT

TM1

TG1

TRACKING PHASE COMPENSATION

VCC

VEE

FZC COMP.

FEI

FEO

FOCUS PHASE COMPENSATION

DFCT

FS4

FDFCT

FGD

FLB

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Terminal description

CR-305X

Symbol

No.

1 FEO O

2 FEI Focus error input. I 34FDFCT

FGD I

5 FLB

6 FE_O 7

FE_M

8 SRCH

TGU

TG2

FSET

12 TA_M I Tracking amplifier inverted input.

TA_O

13 14

SL_P

SL_M 16 SL_O O Sled drive output. 17 ISET I Connect an external capacitance to set the current

VCC 19 LOCK I

20 CLK

XLT

21 22 DATA

XRST I Reset input; resets at Low. (no pull-up resistance)

23 24 C. OUT

SENS1

I/O

Focus error amplifier output. Connected internally to the window comparator input for bias adjustment.

Capacitor connection pin for defect time constant. Ground this pin through a capacitor for cutting the

focus servo high-frequency gain. External time constant setting pin for boosting the

focus servo low-frequency.

Focus drive output. I Focus amplifier inverted input. I

External time constant setting pin for generating

focus search waveform. I External time constant setting pin for switching track-

ing high-frequency gain.

External time constant setting pin for switching track-

ing high-frequency gain.

Peak frequency setting pin for focus and tracking

phase compensation amplifier.

O Tracking drive output.

I Sled amplifier non-inverted input. I Sled amplifier inverted input.

which determines the Focus search, Track jump, and

Sled kick heights. I Positive power supply.

The sled overrun prevention circuit operates when

this pin is Low. (no pull-up resistance) I

Serial data transfer clock input from CPU.

(no pull-up resistance) I

Latch input from CPU. (no pull-up resistance)

Serial data input from CPU. (no pull-up resistance)

Track number count signal output.

Outputs FZC, DFCT1, TZC, BALH, TGH, FOH,

ATSC, and others according to the command from

CPU.

Description

Symbol

No.

26 SENS2 O

FOK

CC2 I

CC1

30 CB 31 CP

RF_I I

33 RF_O 34 RF_M

35 RFTC

LD O APC amplifier output.

PD I APC amplifier input.

PD1

38 39

PD2

FE_BIAS

42IE 43 EI

VEE 45 TEO O 46 LPFI I Comparator input for balance adjustment.

TEI

ATSC

48 49

TZC 50

TDFCT 51

VC 52 FZC

I/O

Outputs DFCT2, MIRR, BALL, TGL, FOL, and others according to the command from the CPU.

O Focus OK comparator output.

Input for the defect bottom hold output with capacitance coupled.

O Defect bottom hold output. Connected internally to

the interruption comparator input. Connection pin for defect bottom hold capacitor.

Connection pin for MIRR hold capacitor.

MIRR comparator non-inverted input. Input for the RF summing amplifier output with capa-

citance coupled. RF sunning amplifier output. Eyepattern check point.

RF summing amplifier inverted input.

The RF amplifier gain is determined by the resistance connected between this pin and RFO pin.

External time constant setting pin during RF level control.

RF I-V amplifier inverted input. Connect these pins to the photo diode A + C and B + D pins.

I I

Bias adjustment of focus error amplifier. Leave this pin open for automatic adjustment.

F I-V and E I-V amplifier inverted input. Connect these pins to photo diodes F and E.

—

I-V amplifier E gain adjustment. (When not using automatic balance adjustment)

—

Negative power supply. Tracking error amplifier output. E-F signal is output.

(Input from TEO through LPF) Tracking error input.

Window comparator input for ATSC detection.

I I

Tracking zero-cross comparator input.

Capacitor connection pin for defect time constant.

O (VCC + VEE)/2 direct voltage output.

Focus zero-cross comparator input.

Description

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