Cambridge Audio DVD-89 Service manual

DVD89

Issue Date: 27th February 2006

SERVICE MANUAL

SPECIFICATIONS:

Disc Types DVD, DVD-A, DVD-V, CD-RW

CD-R, CD-DA, DIVX, SACD

Audio Formats 5.1 and Stereo Downmix
LPCM 16 bit 44.1kHz
Dolby Digital 5.1 24 bit 96kHz
DTS Output (Digital Audio Out Only)
DVD Audio 2 Channel 24 bit 192kHz
DVD Audio 5.1 (MLP) 24 bit 96kHz

Video Composite Video (CVBS)
S-Video (SVHS)
RGB
DVI-D & HDMI
Component (YCbCr)
PAL/NTSC
Interlaced / Progressive Scan

THD (unweighed) < 0.01%

Dynamic Range >100dB

Frequency Response 20Hz – 20kHz

Video Amplitude 1.0V pk-pk (75 ohms)

S-Video Amplitude Y:1.0V pk-pk n (75ohms)
C: 0.286V pk-pk (75 ohms)

Power Supply 100-240V AC~50/60Hz

Max Power Consumption 40W

Dimensions mm (H x W x D) 55 x 430 x 263

Weight (kg) 2.56 kg AP19841/1

Gallery Court Hankey Place London SE1 4BB UK

Tel: [phone] Fax: [phone]

DVD89 SERVICE MANUAL

TABLE OF CONTENTS

Safety Precautions

Front Panel Illustration

Prevention of Static Electricity Discharge

Mechanism Unit Exploded Diagram

Bracket Exploded View and Parts List

Protection of the Laser Diode

Video Output Confirmations – Luminance & Chrominance Signal

HY57V641620HG Pin Configuration & Description (U211)

HY57V641620HG Functional Block Diagram (U211)

MT1392 Pin Definitions (U203)

MT1392 System Configuration & Functional Block (U201)

MT1392 Functions (U201)

MT1392 Pinout Diagram (U201)

MT1389 Pinout Diagram (U201)

MT1389 Block Diagram (U201)

MT1389 Pin Function (RF Interface) (U201)

MT1389 Pin Function (Analog Monitor Output) (U201)

MT1389 Pin Function (General Power / Ground, Micro Controller & Flash Interface) (U201)

MT1389 Pin Function (Micro Controller & Flash Interface) (U201)

MT1389 Pin Function (Audio Interface) (U201)

MT1389 Pin Function (Video Interface) (U201)

MT1389 Pin Function (DRAM Interface) (U201)

MT1389 Pin Function (DRAM Interface & JTAG Interface) (U201)

Front Panel & VFD Schematic

Front Panel & VFD Board Layout

Power Supply Schematic

Power Supply PCB Layout

Main PCB Board (Main Processor)

Main PCB Board (Memory, Reset & Main Clock)

Main PCB Board (Audio DACS, Output Filters & Mute)

Main PCB Board (DVI & HDMI)

Main PCB Board (Video Outputs)

Main PCB Board Layout

Power Board Parts List

Main Panel Parts List

Decode Board Parts List

Serviceable Parts List

3

4

5

6

7

8

9

10

11

12/13/14

15

16

17

18

19

20

21

22

23

24

25

26/27

28

29

30

31

32

33

34

35

36

37

38

39

40

41/42

43

Cambridge Audio DVD89 DVD Player

1. When servicing, observe the original lead dress. if a short circuit is found, replace all parts which have

been overheated or damaged by the short circuit.

2. After servicing, see to it that all the protective devices such as insulation barrier, insulation papers

shields are properly installed.

3. After servicing, make the following leakage current checks to prevent the customer from being exposed
to shock hazards.

Some semiconductor(solid state)devices can be damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive(ES)Devices. Examples of typical ES devices are integrated
circuits and some field-effect transistors and semiconductor chip components. The following techniques

should be used to help reduce the incidence of component damage caused by electro static discharge(ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain
off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially
available discharging ESD wrist strap, which should be removed for potential shock reasons prior to

applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices,place the assembly on a conductive
surface such as alminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static

(ESD protected)can generate electrical charge sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES

devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are
ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by
conductive foam, alminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch

the protective material to the chassis or circuit assembly into which the device will be installed.
Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion

such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can

generate static electricity(ESD).

COPYRIGHT NOTICE.

© 2005 Audio Partnership PLC. All rights reserved.

Cambridge Audio is a registered trademarks of Audio Partnership PLC. This document may not
be reproduced, distributed, transmitted, displayed, published, or broadcast without the express
written prior permission of Audio Partnership PLC.
Alteration or removal of any trademark, copyright, or other notice from this content is prohibited.
Information provided in this document is provided solely for the use of official service agents in
repairing and servicing Audio Partnership PLC products.

Safety Precautions

Cambridge Audio DVD89 DVD Player

POWER switch

2

Disc tray

3

Display window

4

OPEN/CLOSE button

5

PLAY/PAUSE button

6

STOP button

2

4

7

Skip/Scan button

3

7

6

5

Front Panel Illustration

Cambridge Audio DVD89 DVD Player

The laser diode in the traverse unit (optical pickup)may brake down due to static electricity of clothes or human

The laser diode in the traverse unit (optical pickup) may break down due to static electricity of clothes or human
body. Use due caution to electrostatic breakdown when servicing and handling the laser diode.

Some devices such as the DVD player use the optical pickup(laser diode)and the optical pickup will be damaged

1. Grounding for electrostatic breakdown prevention
Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be
damaged by ststic electricity in the working enviroment. Proceed servicing works under the working
enviroment where grounding works is completed.

2. Worktable grounding
Put a conductive material sheet on the area where the optical pickup is placed, and ground the
sheet.

3. Human body grounding

Use the anti-static wrist strap to discharge the static electricity from your body.

sa fety_3 (157 7x40 9x2 tiff)

4. Handling of optical pickup

5. To keep the good quality of the optical pickup maintenance parts during transportation and before
installation, the both ends of the laser diode are short-circuited.After replacing the parts with new ones,
remove the short circuit according to the correct procedure. (See this Technical Guide).

6. Do not use a tester to check the laser diode for the optical pickup .This will damage the laser
diode due to the power supply in the tester.

7. Handling precautions for Traverse Unit (Optical Pickup)

8. Do not give a considerable shock to the traverse unit(optical pickup)as it has an extremely high-precise
structure.

9. When replacing the optical pickup, install the flexible cable and cut is short land with a nipper. See the
optical pickup replacement procedure in this Technical Guide. Before replacing the traverse unit, remove
the short pin for preventingstatic electricity and install a new unit. Connect the connector as quickley as
possible.

10. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the cable.

11. The half-fixed resistor for laser power adjustment cannot be adjusted. Do not turn the resistor.

Prevention of Static Electricity Discharge

Cambridge Audio DVD89 DVD Player

Mechanism Unit Exploded Diagram

Cambridge Audio DVD89 DVD Player

1) Bracket

2) Belt

3) Screw

4) Belt Wheel

5) Gear Wheel

6) Iron Chip

7) Immobility Mechanism Equipment

8) Magnet

9) Platen

10) Bridge Bracket

11) Screw

12) Screw

13) Big Bracket

14) Front Silicon Rubber

15) Back Silicon Rubber

16) Pick Up

17) Pick Up

18) Switch

19) Five Pin Flat Plug

20) Screw

21) PCB

22) Motor

23) Moto Wheel

24) Screw

25) Tray

Bracket Exploded View and Parts List

Cambridge Audio DVD89 DVD Player

Laser Diode Protection Shorts (Replacement Parts)

Cautions on assembly and adjustment

Make sure that the workbenches, jigs, tips, tips of soldering irons and measuring instruments are grounded,
and that personnel wear wrist straps for ground.

For replacement optical pickups open the LD short lands quickly with a soldering iron after
circuit is connected.

Refrain from operation and storage in atmospheres containing corrosive gases (such as H2S,SO2,

NO2 and Cl2)or toxic gases or in locations containing substances(especially from the organic silicon,cyan,
formalin and phenol groups)which emit toxic gases.It is particularly important to ensure that none of the
above substances are present inside the unit.Otherwise,the motor may no longer run.

Protection of the Laser Diode

Cambridge Audio DVD89 DVD Player

Screwdriver,Oscilloscope

Do these confirmations after replacing a P.C.B. - (Luminance Signal)

Measurement point

Video output terminal

Measuring equipment,tools

200mV/dir,10 sec/dir

Purpose:To maintain video signal output compatibility.

1.Connect the oscilloscope to the video output terminal and terminate at 75 ohm.

2.Confirm that luminance signal(Y+S)level is 1000mVp-p±30mV

PLAY(Title 46):DVDT-S15
PLAY(Title 12):DVDT-S01

Mode Disc

Color bar 75%

Confirmation value

1000mVp-p±30mV

(Chrominance Signal)

Measurement point

Video output terminal

Measuring equipment,tools Confirmation value

200mV/dir,10 sec/dir

Purpose:To maintain video signal output compatibility.

1.Connect the oscilloscope to the video output terminal and terminate at 75 ohm.

2.Confirm that the chrominance signal(C)level is 621 mVp-p±30mV

PLAY(Title 46):DVDT-S15
PLAY(Title 12):DVDT-S01

Mode Disc

Color bar 75%

621mVp-p±30mV

Video Output Confirmations - Luminance & Chrominance Signal

PIN CONFIGURATION

Cambridge Audio DVD89 DVD Player

VDD

DQ0

VDDQ

DQ1
DQ2

VSSQ

DQ3
DQ4

VDDQ

DQ5
DQ6

VSSQ

DQ7

DD

V

LDQM

/WE
/CAS
/RAS

/CS
BA0
BA1

A10/AP

A0
A1
A2
A3

DD

V

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

54pin TSOP II

400mil x 875mil

0.8mm pin pitch

VSS

54

DQ15

53

VSSQ

52

DQ14

51

DQ13

50

VDDQ

49
48

DQ12

47

DQ11
VSSQ

46

DQ10

45
44

DQ9

43

VDDQ

42

DQ8

SS

V

41

NC

40

UDQM

39

CLK

38

CKE

37

NC

36
35

A11
A9

34

A8

33

A7

32
31

A6
A5

30

A4

29

SS

V

28

PIN DESCRIPTION

PIN PIN NAME DESCRIPTION

CLK Clock

CKE Clock Enable

CS Chip Select Enables or disables all inputs except CLK, CKE and DQM

BA0,BA1 Bank Address

A0 ~ A11 Address

Row Address Strobe,

RAS, CAS, WE

LDQM, UDQM Data Input/Output Mask Controls output buffers in read mode and masks input data in write mode

DQ0 ~ DQ15 Data Input/Output Multiplexed data input / output pin

VDD/VSS Power Supply/Ground Power supply for internal circuits and input buffers

VDDQ/VSSQ Data Output Power/Ground Power supply for output buffers

NC No Connection No connection

Column Address Strobe,
Write Enable

The system clock input. All other inputs are registered to the SDRAM on the
rising edge of CLK

Controls internal clock signal and when deactivated, the SDRAM will be one
of the states among power down, suspend or self refresh

Selects bank to be activated during RAS activity
Selects bank to be read/written during CAS activity

Row Address : RA0 ~ RA11, Column Address : CA0 ~ CA7
Auto-precharge flag : A10

RAS, CAS and WE define the operation
Refer function truth table for details

(U211) HY57V641620HG Pin Configuration & Description

Cambridge Audio DVD89 DVD Player

I/O Buffer & Logic

1Mbit x 4banks x 16 I/O Synchronous DRAM

Self refresh logic

CLK

CKE

CS

RAS

CAS

WE

UDQM

LDQM

& timer

State Machine

Bank Select

Row active

refresh

Column
Active

Internal Row

counter

Row

Pre

Decoders

Column

Pre

Decoders

Column Add

Counter

1Mx16 Bank 3

X decoders

X decoders

1Mx16 Bank 2

1Mx16 Bank 1

X decoders

X decoders

1Mx16 Bank 0

Memory

Cell

Array

Y decoders

Sense AMP & I/O Gate

DQ0

DQ1

DQ14

DQ15

A11
BA0
BA1

A0
A1

Address

Address buffers

Registers

Mode Registers

Burst

Counter

CAS Latency

Data Out Control

Pipe Line Control

(U211) HY57V641620HG Functional Block Diagram

Cambridge Audio DVD89 DVD Player

Pin number Symbol Type Description

1 DVSS GND Digital ground

2-9 C0-C7 I, PD Normal : Digital chroma input

VDAC test : DAC test mode [0:7] input.

BIST mode : BIST data input
10 DVDD33 VDD Digital power, 3.3V
11 VCK I Clock of digital video input
12 DVSS GND Digital ground

13-20 Y0-Y7 I, PD Normal : Digital luma input

VDAC test : DAC test data [0:7] input.

BIST mode : BIST address input
21 SSCK I

22 SSD IO Slave serial interface data input/output
23 DVDD18 VDD Power of digital core, 1.8V
24 PWDN# I, PU Power down, actiev low
25 RST# I, PU Reset, active low
26 XTAL I Normal : clock input

27 INT O
28 DVSS GND Digital ground
29 A7/GPO0 IO,PD

30 A6/GPO1

31 TRAP2/GP02

TRAP1/GP03

TRAP0/GP04

Trap Mode
bit 2 1 0

0 0 0 Normal,
1 A1 A0 Normal, with master 12C enable

0 0 1 Test scan mode
0 1 0 VDAC test mode
0 1 1 BIST

34 MSCK/GPO5 O MasterI2C on : Master serial interface clock output

IO,PD

IO,PD

IO,PD

IO,PD

with master 12C disable

A(1:0) : EEPROM device address select

mode

Normal : Slave serial interface clock input

SCAN mode : scan reset, active low

VDAC test: VDAC test clock imput

Interrupt output

Power On: Serial interface address 7
BIST mode : SRAM fail output
Normal : General purpose output

Power On: Serial interface address 6
BIST mode : SRAM fail output
Normal : General purpose output

Power On: Hardware trap bit 2
BIST mode : SRAM fail output
Normal : General purpose output

Power On: Hardware trap bit 1
BIST mode : SRAM fail output
Normal : General purpose output

Power On: Hardware trap bit 0
BIST mode : SRAM fail output
Normal : General purpose output

BIST mode : SRAM fail output

Normal : General purpose output

(U203) MT1392 Pin Definitions

Cambridge Audio DVD89 DVD Player

Pin number Symbol Type Description

MSD/GPO6 IO,PU MasterI2C on : Master serial interface data input/output

BIST mode : SRAM fail output
Normal : General purpose output

36 GPO7 IO,PD PowerON : EPROM word-address type. 1 : 16bit , 0 : 8bit

BIST mode : SRAM fail output
Normal : General purpose output

37 GPIO8 IO BIST mode : SRAM fail output

Normal : General purpose output / HDMI test input / down-mixed audio input

38 GPIO9 IO BIST mode : SRAM fail output

Normal : General purpose output / V-sync inout / HDMI test input
VDAC test : PLL test enable

39 GPIO10 IO BIST mode : SRAM fail output

Normal : General purpose output / H-sync inout / HDMI test input

VDAC test : PLL test calibration
40 HTPLG I,PD HDMI Hot-Plug detection
41 AVSS GND Analog ground
42 PLLC0 A PLL Capacitor ground
43 PLLC1 A PLL Capacitor
44 AVDD VDD Analog power, 3.3V
45 AVDD VDD Analog power, 3.3V
46 AVSS GND Analog Ground
47 AVSS GND Analog Ground
48 TCK- AO HDMI Tx clock
49 TCK+ AO HDMI Tx clock
50 AVDD VDD Analog power, 3.3V
51 TX0- AO HDMI Tx channel 0
52 TX0+ AO HDMI Tx channel 0
53 AVSS GND Analog Ground
54 TX1- AO HDMI Tx channel 1
55 TX1+ AO HDMI Tx channel 1
56 AVDD VDD Analog power, 3.3V
57 TX2- AO HDMI Tx channel 2
58 TX2+ AO HDMI Tx channel 2
59 AVSS GND Analog Ground
60 SWING AI HDMI output swing adjustment
61 AVDD VDD Power of DAC, 3.3V
62 VREF A Voltage reference of DAC
63 FS A DAC full scale adjustment
64 AVSS GND Ground of DAC
65 AVDD VDD Power of DAC, 3.3V
66 AVSS GND Ground of DAC
67 AVDD VDD Power of DAC, 3.3V
68 G AO Component analog video output Y/Green
69 AVSS GND Ground of DAC
70 B AO Component analog video output Cb/Blue
71 R AO Component analog video output Cr/Red

(U203) MT1392 Pin Definitions