Denon DVD-900 User manual

SERVICE MANUAL

MODEL

DVD-900

DVD VIDEO PLAYER

Some illustrations using in this service manual are slightly different from the actual set.

16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN

Telephone: 03 (3837) 5321

For Asia & Australia model

This service manual is composed of only pages whose contents are different

from those for the model DVD-900. For servicing, refer to the previously

issued service manual of DVD-900 (X0156-2) at the same time.

X0156-2 NC 0209

TABLE OF CONTENTS

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Manufactured under license from Dolby Laboratories. "Dolby"

and the double-D symbol are trademarks of Dolby Laboratories.

"DTS" and "DTS Digital Out" are trademarks of Digital Theater Systems Inc.

- 3 -

FLOW CHART NO.1

FLOW CHART NO.2

The power cannot be turned on.(1)

FLOW CHART NO.3

The fuse blows out.

After servicing, replace the fuse.

The power cannot be turned on.(2)

Is the fuse normal?

Is normal state restored when once unplugged

power cord is plugged again after several seconds?

Is the EV 5V line voltage normal?

Is the voltage of secondary side normal?

Does the change from STANDBY LED indicate

turn-off?

Is the voltage of 3.3V supplied to Q2021?

Is the "H" signal inputted to the base of Q2021,

when the POWER button activated on the DVD?

Is the "H" signal inputted at base of Q2021,

when the POWER button activated on the remote

control unit?

Replace Q2021.

The STANDBY LED indicate is flashing after 0.5 sec.

Are the "P-ON-H" pulse outputted from the

pin(20) of CN1001?

Is the P-CON switch circuit operated normally?

(Q1002, Q1005, Q1006, IC1002, D1036, D1046)

Check the presence that the primary component

is leaking or short then service it if defective.

See FLOW CHART No.3 <The fuse blows out.>

Check if there is any leak or shor-circuit on the

primary circuit component?

(Q1001, Q1003,T1001, D1001, D1002, D1004,

D1005, D1011, C1003, C1005)

Check each rectifying circuit of secondary circuit.

Check the EV 3.3V line.

Check the POWER button line.

Check the line between the remote control

receiver and Pin(26) of CN1001.

Replace the DVD Main CBA Unit.

Check each component, and replace.

Check the presence that the rectifying diode or

circuit is shorted in each rectifying circuit of

secondary side then service it if defective.

Yes

Yes (below, confirmed operating at LED turn-off of 0.5 sec.interval.)

Yes

TROUBLESHOOTING

- 4 -

FLOW CHART NO.4

When the output voltage fluctuates.

Yes

FLOW CHART NO.5

When buzz sound can be heard in the vicinity of the power circuit.

FLOW CHART NO.6

The fluorescent display tube does not light.

Is the voltage of 5V supplied to Pins(6, 24)

of IC2001?

Is the voltage of -24V supplied to Pin(15) of

IC2001?

Is there 500kHz oscillation to Pin(26) of IC2001?

Check the signal lines of FP-DIN, FP-DOUT,

FP-CLK, FP-STB of IC2001 and CN1001?

Are the filament voltage applied between (1, 2)

and (34, 35) of the fluorescent display tube?

Also negative voltage applied between these pins

and GND?

Replace the fluorescent display tube.

Check the EV 5V line.

Check the -FL (-24V) line.

Check R2001, IC2001 and their periphery.

Check or replace IC2001 and DVD Main CBA unit

Check or replace the power circuit, D1016, D1017

and R1042, and their periphery.

FLOW CHART NO.7

The key operation is not functioning.

Are the contact point and the installation state of the

key switches(SW2204-2210, 2901-2907) normal?

Is the control voltage normally supplied to

Pins(3, 4, 7, 8, 9, 10, 11, 12, 13, 14) of IC2001? Check the key switches (SW2204-2210,

2901-2907), and their periphery circuit.

Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side

(D1003, D1008, D1009, D1013, D1016, D1030, IC1002, Q1002, Q1004, Q1007, Q1011, Q1014)

Does the photo coupler circuit on the secondary

side operate normally?

Does the photo coupler circuit on the primary side

operate normally?

Check the circuit and replace the parts.

(IC1001, IC1006, D1048, D1015)

Check the circuit and replace the parts.

(IC1001, D1020, D1024)

- 5 -

FLOW CHART NO.8

No operation is possible from the remote control unit.

Operation is possible from the DVD, but no

operation is possible from the remote control unit.

Is no operation possible if replacing the remote

control unit?

Replace the infrared remote control receiver.

Original remote control unit is poor.

Check the line between the infrared remote control

receiver and Pin(26) of CN1001.

Replace DVD Main CBA unit.

Is the "L" pulse sent out from Pin(1) terminal of the

receiver when the infrared remote control is activated?

Is the "L" pulse signal supplied to Pin(26) of

CN1001 from Pin(1) of receiver? (Be operated by

SEARCH(-), SEARCH(+), PLAY, STILL/PAUSE,

STOP, POWER and OPEN/CLOSE button.)

Yes

Is 5V voltage supplied to Pin(3) terminal of infrared

remote control receiver? Yes

Yes

FLOW CHART NO.9

PON 12V is not outputted.

Is PON12V voltage supplied to the collector of Q1002?

Does the P-ON switch circuit operate normally?

(Q1005, Q1006, D1036, etc.)

Replace Q1002.

Check D1009, C1012 and the periphery circuit.

Check each component, and replace.

Yes

Check EV 5V line.

FLOW CHART NO.10

PON 5V is not outputted. (PON 12V is outputted normally.)

Is 5V voltage supplied to the collector of Q1004?

Is the "H" pulse inputted into the base of Q1004?

Replace Q1004.

Check D1030, D1048, C1035, C1048 and the

periphery circuit.

Check D1046 and the periphery circuit.

Yes

FLOW CHART NO.11

-FL is not outputted.

Is -24V voltage supplied to the anode of D1003? Check D1003 and periphery circuit.

Check if there is any leak or short-circuit on the

loaded circuit.

Yes

FLOW CHART NO.12

PON 3.3V is not outputted.

Is 3.3V voltage supplied to the emitter of Q1011?

Does the P-CON switch circuit operate normally?

(Q1005, Q1006, etc.)

Replace Q1011.

Check D1008, D1015, C1007, C1038 and the

periphery circuit.

Check each component, and replace.

Yes

- 6 -

FLOW CHART NO.13

PON 1.8V is not outputted.

FLOW CHART NO.14

The disc tray cannot be opened and closed.

(It can be done using the remote control unit.)

FLOW CHART NO.15

The disc tray cannot be opened and closed.

FLOW CHART NO.16

[No Disc] is indicated. (When the focus error occur.)

Replace the DVD Main CBA Unit.

Is 2.5V voltage supplied at pin(1) of IC1002?

Is 0V voltage supplied to Pin(9) of IC2001 when

the OPEN/CLOSE button is activated on the DVD?

See FLOW CHART NO. 15. <The disc tray cannot be opened and closed.>

Is the "H" pulse inputted into pin(4) of IC1002?

Replace IC1002.

Replace the DVD Main CBA Unit.

No improvement can be found.

Replace the DVD Mecha.

Check D1013, C1014 and the periphery circuit.

Check PWRCON line.

Check the SW2208 and OPEN/CLOSE button.

The malfunction of the original DVD Main CBA Uni

Yes

Replace the DVD Mecha.

Yes

- 7 -

FLOW CHART NO.17

[No Disc] is indicated. (When the focus servo is not functioning.)

FLOW CHART NO.18

[No Disc] is indicated. (When the laser beam does not light up.)

FLOW CHART NO.19

Both functions of picture and sound do not operate normally.

Replace the DVD Main CBA Unit.

Replace the DVD Mecha.

Yes

Replace the DVD Main CBA Unit.

Replace the DVD Mecha.

Yes

Replace the DVD Main CBA Unit.

Replace the DVD Mecha.

Yes

No improvement can be found. The malfunction of the original DVD Main CBA Uni

- 8 -

FLOW CHART NO.20

Picture does not appear normally.

Set the disc on the disc tray and playback.

Are the video signals outputted to each pin of

CN1601 on the the AV CBA? Replace the DVD Main CBA Unit or DVD Mecha .

Check the line between each pins of CN1601 and

each pins of IC1402 on the AV CBA .

Is 5V voltage supplied to the Pins(1, 3, 5, 34) of

IC1402?

Check or replace IC1402?

Check the periphery of the VIDEO OUT terminal

(JK1403) from Pins(18, 21, 24, 30) of IC1402.

Check the periphery of JK1401 from

Pin(27) of IC1402.

Check the periphery of JK1401 from

Pin(33) of IC1402.

CN1601 10PIN →IC1402 4PIN CVBS

CN1601 8PIN →IC1402 6PIN S-Y

CN1601 12PIN →IC1402 2PIN S-C

CN1601 6PIN →IC1402 14PIN B

CN1601 4PIN →IC1402 16PIN R

CN1601 2PIN →IC1402 12PIN G

Are the video signals shown above inputted into

each pin of IC1402?

Are the video signals outputted to each pin

of IC1402?

Are the video signals outputted to the specific

output terminal?

Are the composite video signals and component

video signals outputted to the VIDEO OUT

terminal (JK1403)?

Are the luminance signals outputted to the

S-OUT terminal (JK1401)?

Are the chroma signals outputted to the

S-OUT terminal (JK1401)?

Yes

CN1601 10PIN CVBS

CN1601 8PIN S-Y

CN1601 12PIN S-C

CN1601 6PIN B

CN1601 4PIN R

CN1601 2PIN G

IC1402 4PIN CVBS

IC1402 6PIN S-Y

IC1402 2PIN S-C

IC1402 14PIN B

IC1402 16PIN R

IC1402 12PIN G

IC1402 30PIN CVBS

IC1402 27PIN S-Y

IC1402 33PIN S-C

IC1402 21PIN B

IC1402 18PIN R

IC1402 12PIN G

- 9 -

FLOW CHART NO.21

Audio is not outputted.

Set the disc on the disc tray and playback.

Are the analog audio signals outputted to each pin

of CN1601 on the AV CBA?

Is the "H" level mute signals outputted to CN1601

on the AV CBA ?

CN1601 16PIN AUDIO-L

CN1601 18PIN AUDIO-R

CN1601 19PIN A-MUTE

CN1601 17PIN A-R-MUTE

CN1601 15PIN A-L-MUTE

IC1201 1PIN AUDIO-L

IC1201 7PIN AUDIO-R

IC1201 2PIN AUDIO-L

IC1201 6PIN AUDIO-R

Replace the DVD Main CBA Unit or DVD Mecha.

Replace the DVD Main CBA Unit.

Check or replace IC1201.

Check the periphery of Pins(1,7) of IC1201

and JK1201.

Check each line between each pin of CN1601

and each pin of IC1201 on the AV CBA.

CN1601 16PIN →IC1201 2PIN AUDIO-L

CN1601 18PIN →IC1201 6PIN AUDIO-R

Are the analog audio signals inputted to each pin

of IC1201.

Are the analog audio signals inputted to each pin

of IC1201?

Are the audio signals outputted to the specific

output terminal?

Are the audio signals outputted to the L/R OUT

terminal (JK1201)?

Yes

‑10‑

JK1401

S-VIDEO

OUT

CN701 CN1601

88VIDEO-Y

12 12VIDEO-C

3 4

AV CBA

DATA(VIDEO) SIGNAL VIDEO SIGNALDATA(AUDIO) SIGNAL

IC601 (DVD HOST PROCESSOR)

IC1402 (VIDEO DRIVER)

IC604

IC602

(8Mbit FLASH MEMORY)

PARA0

PARA7

A18

DATA0

AD0

AD13

DATA15

DQ0

DQ15

CS3

DQM0

AD0

AD13

DQ0

DQ15

ADDR1

ADDR20

DATA0-DATA15

ADDR1-ADDR20

PARA0-PARA7

79 80 78

6 27

7677

17 18 39 16

DQ0

DQ15

DQML

DQMU

(64Mbit SDRAM)

20 26

213

29 35

42 53

173

182

161

170

141

158

128

132

117

DATA(VIDEO/AUDIO) SIGNAL

RAS

CAS

LDQM

UDQM

RAS

CAS

58 63

66 73

~74

INTERNAL

PERIPHERALS

PORTS

PROGRAMMABLE

CPU INTERFACE

CENTRAL

COMMAND

PORT

FRONT-END

& LINK

INTERFACE

ST20 ARBITER &

MEMORY CONTROLLER

SDRAM ARBITER

SHARED SDRAM INTERFACE

I/F

VIDEO

DECODER

AUDIO

DECODER

CACHE

SUBSYSTEM

CPU

VIDEO

FILTERING

OSD, SP

DECODER

& MIXING

4dB

AMP 2dB

AMP

LPF DRIVER

CD FIFO SDRAM

BLOCK

MOVE

DENC

SPDIF

PCM-LRCLK

PCM-SCLK

PCM-DATA0

PCM-BCK

FROM DVD

SIGNAL PROCESS

BLOCK DIAGRAM TO AUDIO

BLOCK

DIAGRAM

DVD MAIN CBA UNIT

ADAC-MD

ADAC-MC

ADAC-ML

191

190

189

192

TO AUDIO

BLOCK DIAGRAM

A-MUTE

ADAC-MD

ADAC-MC

ADAC-ML

A-MUTE

102

84 93

4dB

AMP 2dB

AMP

LPF DRIVER

4dB

AMP 2dB

AMP

LPF DRIVER4

4dB

AMP 2dB

AMP

LPF DRIVER

4dB

AMP 2dB

AMP

LPF DRIVER

10 10

VIDEO-CVBS

66VIDEO-B

44VIDEO-R

CN701 CN1601

WF2

WF3

WF1

22VIDEO-G

4dB

AMP 2dB

AMP

LPF DRIVER

COMPOSITE

VIDEO OUT

VIDEO-R

OUT

VIDEO-B

OUT

VIDEO-G

OUT

JK1403

Video Block Diagram

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