ONKYO TXDS898 - Service Manual Immediate Download

TX-DS898

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.

SERVICE MANUAL

AV RECEIVER

Black, Golden and Silver models

MODEL

TX-DS898

092001

BMDD

BMPP,SMPP,BMPA,GMPA

BMWT,GMWT,GMWR

GMGT

120V AC, 60Hz

230-240V AC, 50Hz

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

220V AC, 50Hz

STANDBY/ON

OFF

ON

POWER

STANDBY

MASTER VOLUME

FM

AM

PHONO

C D

TAPE

DVD

VIDEO

3

VIDEO

5

VIDEO

4

VIDEO

2

VIDEO

1

ZONE

2 (

)

GRN

REC (

)

RED

AUDIO

SELECTOR

DISPLAY

PURE AUDIO

UPSAMPLING

TX-DS

898

PUSH TO OPEN

TX-DS898

BLOCK DIAGRAM

A

1

2

3

4

5

B

C

D

E

F

G

H

S U R R O U N D S P E A K E R S

L E F T

R I G H T

S U R R O U N D B A C K S P E A K E R S

/ Z O N E 2 S P E A K E R S

R I G H T / B A C K

L E F T

D C 2 4 V

4 A I N

M U L T I C H A N N E L I N P U T

L

R

C

S W

S L

S R

S B L

S B R

1 4

8

7

1

D 4 V I D E O O U T P U T

1 4

8

7

1

D 4 V I D E O I N P U T 2

1 4

8

7

1

D 4 V I D E O I N P U T 1

F R O N T S P E A K E R S

R I G H T

L E F T

C E N T E R

C O M P

R E C / Z 2

C O M P

I N P

C

R E C / Z 2

C

I N P

Y

R E C / Z 2

R I G H T

R E C / Z 2

A C O U T L E T

F U S E

R S 2 3 2

Y

C

V I D E O 1

Y

C

S - V I D E O O U T P U T

M O N I T O R

Y

C

V I D E O 2

Y

C

V I D E O 5

( F R O N T )

Y

C

S - V I D E O I N P U T

D V D

Y

C

V I D E O 1

Y

C

V I D E O 2

Y

C

V I D E O 3

Y

C

V I D E O 4

R I G H T

P R E O U T

L E F T

S U R R O U N D

L E F T

S U R R O U N D

R I G H T

S U R R O U N D

B A C K

/ Z O N E 2 L E F T

S U R R O U N D

B A C K

/ Z O N E 2 R I G H T

C E N T E R

S U B W O O F E R

C O O L I N G F A N

I R

D E -

M O D U L A T O R

M U T E

I R 5 6 K

R E -

M O D U L A T O R

1 2 V

T R I G G E R

C O N T R O L

I R

D E -

M O D U L A T O R

1 2 V T R I G G E R

+ B 3

R E L A Y

+ B 2

R E L A Y

D R I V E R

F L A C

F L T U B E

F L A C

M A I N A M P

+ B 1 / - B 1

- 2 7 V

- V P

- 1 5 V

A U D I O

- 5 V

V I D E O

+ 5 V

V I D E O

+ 5 V

D S P

+ 1 5 V

A U D I O

I S D E T

R E L A Y

D R I V E R

V O L T A G E S E N S O R

C U R R E N T S E N S O R

T H E R M A L

S E N S O R

F A N

D R I V E R

R I

I N T E R F A C E

+ 5 . 6 V

S T A N D B Y

Z O N E 2

L I N E O U T

L

R

L V I D E O 2

R

V I D E O 5 L

R

( F R O N T )

2 4 . 5 7 6 M H Z

R E C O U T

L T A P E

R

L V I D E O 1

R

C O M P O S I T E

V I D E O O U T

M O N I T O R

V I D E O 1

V I D E O 2

Z O N E 2

V I D E O 3 L

R

V I D E O 4 L

R

V I D E O 1 L

R

V I D E O 2 L

R

T A P E L

R

D V D L

R

A U D I O I N P U T

P H O N O L

R

C D L

R

C O A X I A L 1

C O A X I A L 2

C O A X I A L 3

C O M P O N E N T V I D E O O U I T P U T

Y

C B

C R

C O M P O N E N T

V I D E O

1

Y

C B

C R

I N P U T

2

Y

C B

C R

V I D E O 3

V I D E O 4

V I D E O 5

( F R O N T )

C O M P O S I T E V I D E O I N P U T

D V D

V I D E O 1

V I D E O 2

H E A D P H O N E

R E M O T E S E N S O R

I R O U T 1

4 0 K

I R O U T

5 6 K

I R O U T

I R O U T 2

4 0 K

I R I N

R I

T 9 0 2

T 9 0 1

A C I N

T O N E

N J U 7 3 0 6 G

O P T I C A L 1

D I G I T A L A U D I O O U T P U T

O P T I C A L 2

O P T I C A L 4

O P T I C A L 3

O P T I C A L 1

O P T I C A L 2

D I G I T A L A U D I O I N P U T

O P T I C A L

V I D E O 5

( F R O N T )

S U B M P U

C S 4 9 3 0 0 2

P O S T

P R O C E S S I N G

( T H X C I N E M A )

( T H X S U R R O U N D E X )

C S 4 9 3 0 0 2

D E C O D I N G

( A C - 3 , D T S , A A C )

( D T S - E S )

( P L I I , N E O : 6 )

M A I N M P U

- 1

Z O N E D

Z O N E C

Z O N E B

Z O N E A

A - B U S

B U 1 9 2 3

R D S

D E C O D E R

T C 9 2 4 6 F

2 N D P L L

F M / A M

T U N E R

P A C K

M P D 4 4 1 0 0 0

S R A M

1 M M I N .

M P D 4 4 1 0 0 0

S R A M

1 M M I N .

M B M 2 9 L V 0 0 2

F L A S H R O M

2 M M I N .

M B M 2 9 L V 0 0 2

F L A S H R O M

2 M M I N .

L E D D R I V E R

M 6 6 0 0 4 F P

F L D R I V E R

O S D

L C 7 4 7 6 1

- 9 1 8 9

A K 4 3 5 6

1 9 2 / 2 4

D / A

A K 4 5 2 8

9 6 / 2 4

D / A

( 2 / 2 )

A K 4 5 2 8

9 6 / 2 4

A / D

( 1 / 2 )

A K 4 1 1 4

D I R

M P D 4 7 2 1 G S

R S 2 3 2

I N T E R F A C E

5 0 K L P F

T C 9 4 A 0 7 F

M A S T E R V O L U M E

T C 9 4 A 0 7 F

C U T

B O O S T

T C 9 4 8 2 F

M C L

B L

T L

D L

B R

T R

M C R

D R

Z 2 R

Z 2 L

D S B L

M C S R

M C S B L

D S W

M C S W

D C

M C C

D S B R

M C S B R

D S R

D S L

M C S L

B P L S

S W - > R

B P L S

S W - > L

B Y P A S S

C - > L

S L - > L

C - > R

S R - > R

B Y P A S S

T V - 5

P O W E R S W

T V - 8

Z O N E 2

R X 0

R X 1

H P E N

R X 2

R X 3

T X 0

R X 4

R X 5

D A U X

R X 6

R X 7

B

P

L

S

J a p a n m o d e l o n l y

D T R - 8 . 2 / 7 . 2 o n l y

- 6 d B

Z o n e 2 L E D

R e c O u t L E D

E x c e p t f o r M D D

T C 9 2 7 4 N - 0 0 8

T C 9 2 7 3 F - 0 1 7

J a p a n m o d e l o n l y

E u r o p e a n m o d e l o n l y

1 5 d B / 3 0 d B

T C 9 1 6 3

T C 9 1 6 4

T C 9 2 7 3 N - 0 0 4

+ 2 9 d B

P o w e r A m p l i f i e r

+ 2 9 d B

1 1 d B

R N 1 2 4 1 x 2 2

P A L

N T S C

S E P

Y - C

M I X

Y - C

R N 1 2 4 1 x 6

F L T

V o l u m e C o n t r o l

K e y M a t r i x

0 d B

6 d B

+ 2 9 d B

6 d B

7 4 H C 4 0 5 1 x 6

M U T E

TX-DS898

ADJUSTMENT AND CONFIRMATION PROCEDURES

Idling current adjustment

Before Idling adjustment, turn the trimming resistors R6040 to R6046 to counter clockwise.

Connect the DC voltmeter to sockets P6080 to P6086.

After turn POWER to ON, adjust the trimming resistors R6040, R6041 and R6042 so that the reading of

voltmeter becomes 7.0 mV. (Front and center channels)

Adjust the trimming resistors R6043, R6044, R6045 and R6046 so that the reading of

After adjustment, attach the top cover.

voltmeter becomes 5.0 mV. (Surround and surround back channels)

Confirm the voltage of points above after about five minutes.

Front and center channels

When less than 9.0 mV, readjust the resistors above so that the voltage becomes 9.0 mV.

When 9.0 mV to 11.0 mV, you are not necessary to adjust.

When more than 11.0 mV, readjust the resistors above so that the voltage becomes 11.0 mV.

Surround and surround back channels

When less than 6.0 mV, readjust the resistors above so that the voltage becomes 6.0 mV.

When 6.0 mV to 8.0 mV, you are not necessary to adjust.

When more than 8.0 mV, readjust the resistors above so that the voltage becomes 8.0 mV.

Note: No load and No signal

L ch.

P6080

R6042 P6082

R6041 P6081

R6043

R6044

R6045

R6046

P6083

P6084

P6085

P6086

R ch.

C ch.

SR ch.

SL ch.

SBL ch.

SBR ch.

NAAF-7250

R6040

+ID

-ID

+ID

-ID

+ID

-ID

+ID

-ID

+ID

-ID

+ID

-ID

+ID

-ID

Confirmation of protection circuit

1. Confirmation of operation of speaker relay

Confirm that the speaker relays turn ON approximate. 5 seconds after the power switch is turned ON.

Confirm that the speaker relays turn OFF immediately after the power switch is turned OFF.

2. Confirmation of DC detection circuit

Press and hold down CD button, then press STANDBY/ON and DISPLAY buttons to set the unit to

"TEST-1" mode.

After "TEST-1" on the FL tube light on, press VIDEO 1 button to set the unit to "TEST-1-00".

Apply DC 1.5 to 3V to MULTI CHANNEL INPUT terminal with no load.

Confirm that the speaker relay turns OFF.

Apply DC -1.5 to -3V to MULTI CHANNEL INPUT terminal with no load.

Confirm that the speaker relay turns OFF.

Caution: Don't apply DC voltage more than 1 sec..

A

1

2

3

4

5

B

C

D

E

F

G

H

TX-DS898

ADJUSTMENT AND CONFIRMATION PROCEDURES

3. Confirmation of Current detection circuit

Set the unit to "TEST-1-00".

Connect the differentiating circuit and apply the 200Hz square signal to MULTI CHANNEL INPUT terminal.

of each channel.

Adjust the attenuator or Volume so that the output level becomes 35V p-p.

Confirm that the speaker relay does not turn OFF when a 3.0 ohm load is connected.

Confirm that the speaker relay turns OFF when a 1.5 ohm load is connected.

CR

OSCILLATOR

DIFFEREN-

TIATING

CIRCUIT

ATTENU-

ATOR

UNIT

SPEAKER

TERMINAL

MULTI

CHANNEL

INPUT

OUT-

PUT

3.3k

10k

1SS133

3.3k

GND

0.01 F

0.1 F

OSCILLO-

SCOPE

Differentiating Circuit

200Hz

SQUARE

35Vp-p

Confirmation of fan

Set the unit to "TEST-1-00".

Apply the 1kHz -30dBV signal to the left channel of MULTI-CH terminal with no load.

Confirm that the fan rotates slow speed after few seconds.

Connect the 1.2 kohm/1W resistor between terminals COM and TH-1 of P6401 with no input signal.

Confirm that the fan rotates slow speed after few seconds.

Next apply the 1kHz -30dBV signal to the left channel of MULTI-CH terminal with no load.

Confirm that the fan rotates high speed after few seconds.

Connect the 1.2 kohm/1W resistors between terminals COM-TH-1 and COM-TH-2 of P6401 respectively with no input signal.

Confirm that the fan rotates high speed after few seconds.

P

69

31

P

77

01

B

P9503A

JL

69

33

A

P

64

01

COM

TH1

TH2

NAETC-7238

TX-DS898

ADJUSTMENT AND CONFIRMATION PROCEDURES 3

Test Mode

1. Turn POWER button on.

2. Press and hold down CD button, then press DISPLAY and STANDBY/ON buttons.

3. After "TEST-1" on the FL tube is displayed, press CD button to set the unit to the test mode of FL tube.

Note: VIDEO 1:TEST-1 VIDEO 2 :TEST-2 ZONE2: UP

VIDEO 3 :TEST-3 VIDEO 4:TEST-4 REC OUT: DOWN

Test-X YZ

Item

FL TUBE

The segments of even

number light on .

All segments

light on.

"FEDCBA987654321"

light on.

"AA BB CC DD EE"

light on.

Test mode of FL tube

REC OUT

ZONE 2

Press POWER button

to finish the test mode of FL tube.

AA:Model "89":TX-DS898 "79":TX-DS797

BB:Video Mode "NS": NTSC "PL": PAL AUTO

CC:12V TRIGGER "TR": Available " ":No available

DD:RDS "RD": Available " ":No available

The segments of odd

number light on .

Confirmation of voltage sensor

1. Set the unit to TEST-3-4.

2. Apply the signal 1kHz, -15dBV to the MULTI-CH

input. Confirm that the FM STEREO is displayed.

Confirm the all channels except SUBWOFFER.

3. When connect the resistor 1.2 kohm/1 W between

the terminals COM and TH1 of P6401, confirm that

"MEMORY" light on.

Note: No input signal.

4.When change set the unit to "TEST-4-39,confirm

that the speaker relays of RL6901 and RL6902

turn off.

Note: No input signal.

EE:Tuner band EU:Europe US: USA SA:Worldwide JP:Japan