Onkyo CR-305-TX Service manual

STANDBY/ON

PHONES

SERVICE MANUAL

CD RECEIVER

MODEL CR-305TX

MEMORY FM MODE

CLEAR

DISPLAY

INPUT

TUNING/PRESET

U

M

L

O

E

V

M

I

N

M

CR-305TX

Ref. No. 3723

062002

REMOTE CONTROLLER

STANDBY/ON

TIMER ENTER

RANDOM

MEMORY REPEAT

SCROLL

PLAY MODE

SLEEP

CLOCK

CALL

E

C

N

E

S

E

R

P

C

I

T

S

U

O

C

A

X

A

PLAY MODE

TUNER

PRESET

REPEAT

O

V

VOLUME

V

O

L

REPEAT

RC-421S

INPUT

CD

MD

M

E

U

A.PRESENCE

L

U

P

MUTING

N

W

U

O

M

D

E

CDR

TAPE

Silver model

UDD,UDT UGT,UGR, UPP

120V AC, 60Hz 220-230V AC, 50Hz 230-240V AC, 50Hz

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 PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.

RC-421S

SERVICE PROCEDURES-1

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

CR-305TX

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 PICKUP BLOCK.

LASER W ARNING LABEL

The labels shown below are affixed.

1. Warning label

2. Class 1 label

LUOKAN 1

"CLASS 1 LASER PRODUCT"

LASERLAITE KLASS 1

LASER APPARAT

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 Pickup Block.

DANGER:

INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCK FAILED OR DEFEATED. AVOID DIRECT EXPOSURE TO BEAM.

CAUTION:

HAZARDOUS LASER AND ELECTROMAGNETIC RADIATION WHEN OPEN AND INTERLOCK DEFEATED.

ATTENTION:

RAYONNEMENT LASER ET ELECTROMAGNETIQUE DANGEREUX SI OUVERT AVEC L'ECLENCHEMENT DE SECURITE ANNULE.

Printed on rear panel

SERVICE PROCEDURES-2

SERVICE PROCEDURES

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.

CR-305TX

REF.NO.

F901

PART NO.

252157 252083

DESCRIPTION

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

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

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

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

2. To initialize the unit

1. Press and hold the MEMORY button and press the DISPLAY button. All segments light up.

2. Press the STANDBY/ON button. When " CLEAR " appears on the display, the preset memory and each mode stored in the memory are initialized

and will return to the factory setting.

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 period 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

CR-305TX

P ANEL VIEW

REAR PANEL

Do not connect the AC power cord (mains lead) to the wall outlet (the mains) until you have completed all the other connections including the connections on page 7, and the speaker connections on page 8. On each pair of connectors, a red connector (marked R) corresponds to the right channel, and a white connector (marked L) to the left channel. Connect white plugs of audio connection cables to L connectors and connect red plugs of audio connection cables to R connectors .

Audio connection cable

OUT (

)

REC

)

PLAY

IN

OUT

)

REC

)

PLAY

IN

(White) (Red)

ANTENNA

L

R

RL

To L connector

To R connector

FM 75

AM

DIGITAL

OPTICAL

OUTPUT

SUBWOOFER

PRE OUT

Improper connection

Insert completely

SPEAKERS

RL

To L connector

To R connector

(White)

(Red)

Please refer to the instruction manual for each component when you make any connections. Insert the plug securely. If the connection is incomplete, noise or malfunction may result.

U.S. and Canadian models

REMOTE

CONTROL

Stereo cassette

tape deck

CD recorder

INPUT (REC) OUTPUT (PLAY)

INPUT (REC)

OUTPUT (PLAY)

TAPE

CDR

(

DIGITAL OPTICAL NPUT

Asian and European models

Stereo cassette

tape deck

CD recorder

Protective cap for the optical digital audio connector

Remove the protective cap before you use the OPTICAL DIGITAL OUTPUT connector. Please retain it for future use. If you do not use the optical digital audio connector, make sure to replace the cap.

INPUT (REC) OUTPUT (PLAY)

INPUT (REC)

OUTPUT (PLAY)

DIGITAL OPTICAL NPUT

DIGITAL OPTICAL INPUT

: Signal flow

REMOTE CONTROL

TAPE

OUT

(

REC

(

PLAY

IN

OUT

(

REC

(

PLAY

IN

CDR MD

ANTENNA

R

)

RL

FM 75

L

OPT I CAL

OUT (

)

REC

(

)

PLAY

IN

RL

OUTPUT (PLAY)

MD recorder

AM

DIGITAL

OUTPUT

SPEAKERS

RL

INPUT (REC)

: Signal flow

To wall outlet

EXPLODED VIEW

CR-305X

6

P901

(DD,DT type)

52

P901

(PP type)

14

20

6

33

Q557A

Q557B

31

Q558

Q560

F901

16

Z3

Z6

26

U5

Q557

Q559

U4

T901

P352

U10

U6

Z2 Z5

U9

6

P778

15

6

U2

10

Z1

P351

U8

6

25

53

6

P303

P302

U1

6

P701

7

U3

44

22

23

46

42

43

41

50

54

1

47

24

CR-305X

9

8

9

12

6

EXPLODED VIEW PARTS LIST-1

CR-305TX

REF NO. PART NO. DESCRIPTION

1 6 7 8 9 10 12 14 15 16 20 22 23 24 25 26 31

33 41

42 43 44 46 47 50 52

53

54

3217210171000 838130088 3200210996000 27190693A 27191112 4070210311000 27175253-1A 27300750 830440069 831430088 4310210401000 3000210266000 838930088 5087210571000 4317210391000 27150456 3207211006000 3207211006100 838430068 3067210858000 3067210858011 5127210262000 4357210031000 5070210851000 3710210333000 5077210843000 880009 5507100500450 5507100500470 5507100500480 5507100500460 5507100500510 5507100500520 5507100500440

FRAME FRONT 3TTB+8B, Self tapping screw MAIN CHASSIS KGLS-6RF, Holder KGPS-6RF, Holder SUPPORTER CD MECHA Leg Busing, cord 4TTC+6C(BC), Self tapping screw 3TTW+8B(BC), Self tapping screw COVER HEAT SINK CABINET COVER 3TTB+8B(UN), Self tapping screw KNOB VOLUME DOOR CD Shield plate BACK CHASSIS BACK CHASSIS 3TTB+6B(BC), Self tapping screw AL PANEL FRONT AL PANEL FRONT DECORATION VOLUME GUIDE VOLUME WINDOW REMOCON LENS INDICATOR WINDOW DISPLAY Plastic rivet, NRP-345 LABEL RATING LABEL RATING LABEL RATING LABEL RATING LABEL FCC and WARNING LABEL FCC and WARNING LABEL LASER CAUTION

<DD, GR, DT, GT> <PP>

<PP, GR, GT> <DD> <GR> <DT> <PP> <DD> <PP, GT, DT> <GR, GT, PP>

REF NO. PART NO. DESCRIPTION

F901

P302 P303 P351 P352 P701 P778 P901

Q557,Q558

Q559,Q560

Q557A Q557B T901

Z1 Z2 Z3 Z5 Z6

CAUTION:

Replacement of the transistor of mark , if necessary, must be made from the same beta group(HFE) as the original type.

252157 252083 2009990500 20022391210 2047161012 2042161022 2047360612 2047151012 253294HDK 253287HIT 253237HIT 2203384 or 2203383 2203394 or 2203393 2120210418000 801433 2301452 2301454 2301453 24800018A 24840133 24840135 838120080 838426088

1.25A-UL/T-237, Fuse

0.4A-SE-EAW, Fuse NSAS-10P0654, Socket NSAS-12P0723, Socket NCFC7-161012, Flexible flat cable NCFC2-161022, Flexible flat cable NCFC7-360612, Flexible flat cable NCFC7-151012, Flexible flat cable AS-UC-2#18, Power supply cord AS-CCEE, Power supply cord AS-CEE, Power supply cord 2SC3851-Y or 2SC3851-O, Transistor 2SA1488-Y or 2SA1488-O, Transistor HEAT SINK 3SMS8W.SW+14B(BC), Special screw NPT-1391D, Power transformer NPT-1391G, Power transformer NPT-1391P, Power transformer NCD-170S, CD mechanism Boss, PCB Boss, PCB3 2TTB+8P, Self tapping screw

2.6TTB+8B(BC), Self tapping screw

<DD, DT> <PP,GR, GT>

<DD, DT> <GR> <PP, GT>

<DD, DT> <GR, GT> <PP>

NOTE: THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.

NOTE:

<DD> : USA and Canadian model only <PP> : European model only <DT> : Taiwanese model only <GT> : Asian model only <GR> : Chinese model only

CR-305TX