Arcam Diva CD72, Diva CD92 Schematic

Service Manual

CD72/92

DiVA CD72, CD92 Compact Disc Player

Issue 1.0

ARCAMARCAM

Contents List

!

Contents list

!

Circuit description

!

Upgrade procedure

!

Service guide

!

Circuit diagrams

!

Component overlays

!

Circuit board parts list

!

General assembly parts list

CD72/CD92 Circuit Description

SUMMARY

The Main PCB for the DiVA CD72/92 player may be built as two different versions:

! With all components fitted for the Alpha CD72

(L887RS)

! With audio components and connectors omitted, for

use as a motherboard for plug-in DAC module L816 (L888RS) for CD92

The CD72 version may be converted for use with a upgrade plug-in DAC board by removing a configuration connector.

The system is based on a Sony kit, comprising CDM14-5BD10 laser mechanism & loader, micro-controller and fluorescent display.

The PCM 1716, as per the 1710, can be operated in either Software or Hardware mode. The default for the CD72 is hardware mode.

Power Supplies & Reset/Mute

Selection for 230V or 115V mains operation is made by inserting a fuse into the appropriate position. The mains transformer has three secondary windings:

1. Provides +12V and -12V supplies for the audio output circuitry via regulators Z204 and Z205.

2. This produces the digital, motor drive and fluorescent display grid supplies:

+7.3V (Z206) Mechanism and motor driver supply +5V (Z208) General digital logic supply +5V (Z207) Supply to DAC +5V (Z203) Supply to system clock generator

-30V (Z209) Display grid voltage.

3. Provides an AC supply for the display filament.

The power-on reset signal XRST is generated by R17 and C29. When the power switch is turned off one of its poles discharges C29 quickly. This, along with the AMUTE signal from the micro, controls the output mute transistors via level shifter Q3.

Remote Control/PIC Micro

The PIC micro controller converts the RC-5 format data into the NEC format required by the Sony micro. The PIC also controls the configuration of the digital filter/DAC on the DAC board.

Micro controller & Display Board

The system micro controller Z212 has the following functions:

! Control of the mechanism & decoder on the CDM14 ! Control of mute, attenuation and deemphasis for the

DAC

! Direct drive of the fluorescent display ! Remote control decoding ! Keyboard scanning

The keyboard scanning works by connecting the keys to a resistor ladder on an ADC input to the micro. Pressing a key presents a unique voltage to this input.

The remote control data contains a ‘ Customer Code’ that identifies this as an Arcam product. The diode network D291 to D297 configures the micro to accept this code.

Motor Driver

The status of the drawer is indicated to the micro by two micro switches ‘ INSW’ and ‘ OUTSW’ on SK205. The micro controls the drawer motor via driver Z210.

DAC & System Clock

The DAC is a Burr Brown PCM1716. Mute, attenuation and deemphasis functions can be controlled via a 3-wire serial link from the system micro to pins 26, 27 & 28 via resistors R31 R32 & R33 respectively. Currently resistors R31 to R33 are not fitted and the DAC is configured for hardware control.

Digital audio is input on pins 1, 2 & 3 in standard Sony format, i.e. Word Clock, Bit Clock and Data.

The system clock is based around 16.9344 MHZ crystal X1 and transistor Q2. This produces a stable clock with low jitter. Z202E & D provide amplification and buffering to the DAC.

Analogue Filters

Z1A (& Z101A) provides the basis for a 2-pole filter. Z1B (& Z101B) buffer the audio and set the output level.

Digital Output

An SPDIF format digital output signal is generated by the decoder on the mechanism assembly. This is passed through isolating transformer T202 to a single phono socket SK5. Optical digital output via Z2 is also tapped off the digital output signal. Power is supplied to Z2 via Z3 a 78L05 regulator.

Upgrade to CD92

The CD72 includes a configuration PCB connected to PL1. This provides power to the DAC and clock generator, connects the digital audio and system clock signals to the DAC and provides additional clock buffering with Z4 A&B .

Removing this board removes these connections and allows the system clock generated on the DAC board to pass through to the CDM14.

Upgrading a CD72 to CD92

1. Disconnect the mains supply from the DiVA CD player.

2. Remove the top cover by taking out the 2 screws from the top edge of the rear

panel (marked 1) and on each side (marked 2).

3. Pull off the sticky plastic gasket between the digital output socket and the

audio output sockets to reveal the 4 audio output socket holes through which the DAC board sockets will pass.

4. Any remnants of adhesive can be removed by rubbing it gently with your

finger and rolling it off. We do not recommend the use of solvents.

5. Fit the 2 supplied PCB (printed circuit board) pillars to the holes in the main

board on either side of the flexfoil coming from the display board. These are marked 3 on the drawing overleaf. The big end of the PCB pillars goes into the main PCB. These push in and clip home. Take great care not to damage the main circuit board.

6. Remove the Configuration Module (the small vertically mounted PCB in the

centre of the main board). It will not be needed once the new DAC board is fitted.

7. Note: The original nickel plated audio output sockets are no longer connected

after the upgrade and cannot be used. However the digital output still functions.

8. Remove the following jumpers :- PL2, PL3, PL4, PL6. Fit the following

jumpers :- PL5, PL7.

9. Fit the magnetic shielding plate, by peeling off one side of (E923MC the

adhesive pad) and stick to (E922MC the shielding plate). Then peel the backing off the other side of pad & Align the top edge with the top of the transformer and fit centrally. It MUST align with the top edge of the transformer, if it is fitted to low to the board it may cause shorting.

10. Take static precautions first. With the aluminium extrusion of the DAC

module uppermost fit the flexfoils from the module in to the appropriate sockets in the main board, ensuring they are pushed fully home. If they are not pushed fully home, the unit may not read discs. You may find it helps to slide the module into the unit so that the audio output sockets fit through the holes in the rear panel and angle the module slightly upwards to achieve this.

11. Push the module down firmly on to the support pillars.

12. Fit the supplied screws with integral washers to the 3 points marked 4 on the

drawing overleaf to secure the module in place. The 2 slightly shorter screws and the shake proof washers should be fitted to the 2 points marked 6.

13. Refit the top cover, connect the unit to live mains and switch on. Press load to

allow the tray to come fully out and then remove the mains lead from the unit. Remove the draw front and fit the new draw front with the CD92 / HDCD logo on.

14. Check the unit functions correctly and if you have an HDCD disc check that a

red glow is seen behind the display window when it is playing.

Upgrading a CD72 ( TEXT ) to CD92 ( TEXT )

1. Disconnect the mains supply from the DiVA CD player.

2. Remove the top cover by taking out the 2 screws from the top edge of the rear

panel (marked 1) and on each side (marked 2).

3. Pull off the sticky plastic gasket between the digital output socket and the

audio output sockets to reveal the 4 audio output socket holes through which the DAC board sockets will pass.

4. Any remnants of adhesive can be removed by rubbing it gently with your

finger and rolling it off. We do not recommend the use of solvents.

5. Fit the 2 supplied PCB (printed circuit board) pillars to the holes in the main

board on either side of the flexfoil coming from the display board. These are marked 3 on the drawing overleaf. The big end of the PCB pillars goes into the main PCB. These push in and clip home. Take great care not to damage the main circuit board.

6. Note: The original nickel plated audio output sockets are no longer connected

after the upgrade and cannot be used. However the digital output still functions.

7. Set the main board jumper settings as listed below :-

PL200 ON

PL201 ON

PL202 ON

PL203 OFF

PL204 ON

PL205 OFF

PL300 2 and 3

PL400 OFF

PL401 OFF

PL402 OFF

8. Fit the magnetic shielding plate ( part no E922MC ) to the adhesive pad ( part

no E923MC). Peel the backing off the other side of the mains transformer. Align the top edge with the top of the transformer and fit centrally.

9. Take static precautions first. With the aluminium extrusion of the DAC

module uppermost fit the flexfoils from the module in to the appropriate sockets in the main board, ensuring they are pushed fully home. If they are not pushed fully home, the unit may not read discs. You may find it helps to slide the module into the unit so that the audio output sockets fit through the holes in the rear panel and angle the module slightly upwards to achieve this.

10. Push the module down firmly on to the support pillars.

11. Fit the supplied screws with integral washers to the 3 points marked 4 on the

drawing overleaf to secure the module in place. The 2 slightly shorter screws and the shake proof washers should be fitted to the 2 points marked 6.

12. Refit the top cover, connect the unit to live mains and switch on. Press load to

allow the tray to come fully out and then remove the mains lead from the unit. Remove the draw front and fit the new draw front with the CD92 / HDCD logo on.

13. Check the unit functions correctly and if you have an HDCD disc check that a

red glow is seen behind the display window when it is playing

3

2

1

4

6

CD72 / CD92 Service Guide

Fault diagnostics

Fault Action

No power Check mains fuse

Check power supply rails

No Audio output Check for digital output, if ok then

check power supply voltages

Check DAC chip Intermittent noise on output Check Dac chip Fails to respond to commands Check supply to remote circuit

Check remote flex foil cable

Check for +4.9volts on RX201 o/p Fails to read disc Check mech supply

Check clock signal Laser optic moves to end stop position

No Display Check filament voltage 3.1vac

Spurious display readout Check for dry joints on display board

Power supply test points

Position Voltage

DGND 0 volts PL6 +12 volts PL3 -12 volts R65 +11 volts Z206 o/p +7.3 volts - mech supply Z207 o/p +5 volts - DAC supply Z208 o/p +5 volts Z209 o/p -30 volts SK291 across pins 1 and 32 3.1 volts AC – display filament

Hints & tips

!

When upgrading from CD72 to CD92 remember to fit the steel plate to the transformer, this reduces noise.

!

The CDM14 mech ( part no. B2009 ) is interchangeable between the Alpha7 series and the DiVA CD72/92 non text version.

!

Please note that the CD72/92 TEXT units use a different mech ( part no. B2012 ), the display and main boards are also different and therefore are not interchangeable parts.

!

Voltage conversion 230/115VAC by changing the internal fuse position and fitting the correct rated fuse. 100VAC requires a different transformer.

Caused by failure of clock signal to

the mech

Check mech supply

Check clock signal

Check flex foil cable

Check for dry joints on micro and

display

7654321

LK1

LK2

D

C

LINK10NP

LK11

LINK10NP

LK21

LINK10NP

LK31

LINK10NP

LK41

LINK10NP

LK51

LINK10NP

LK61

LINK10NP

LK71

LINK10NP

LK81

LINK10NP

LK91

LINK10NP

LK108

LINK10NP

PCB

LINK10NP

LK119

LINK10NP

LK22

LINK10NP

LK42

LINK10NP

LK52

LINK10NP

LK62

LINK10NP

LK72

LINK10NP

LK82

LINK10NP

LK92

LINK10NP

LK109

LINK10NP

PCB

L887PB_2

B

TL1 TOOLING3.0

LK3

LINK10NP

LK13

LINK10NP

LK23

LINK10NP

LK33

LINK10NP

LK43

LINK10NP

LK53

LINK10NP

LK63

LINK10NP

LK73

LINK10NP

LK83

LINK10NP

LK93

LINK10NP

LK110

LINK10NP

DD2

A2 Vertical

Paper Marker

DD_A2V

DD3

A2 Horizontal

Paper Marker

DD_A2H

LK4

LINK10NP

LK120

LINK10NP

LK44

LINK10NP

LK54

LINK10NP

LK64

LINK10NP

LK74

LINK10NP

LK94

LINK10NP

LK111

LINK10NP

Links

DD5

PCB MATERIAL

CEM1, 2 OZ Cu

CEM1_20Z

Documentation

TL3 TOOLING3.0

Tooling Holes & Alignment Marks

F4

T160MASP

Spare Fuse

LK5

LINK10NP

LK15

LINK10NP

LK25

LINK10NP

LK35

LINK10NP

LK55

LINK10NP

LK65

LINK10NP

LK75

LINK10NP

LK85

LINK10NP

LK95

LINK10NP

TL4 TOOLING3.0

LK6

LINK10NP

LK16

LINK10NP

LK46

LINK10NP

LK56

LINK10NP

LK118

LINK10NP

LK76

LINK10NP

LK86

LINK10NP

LK96

LINK10NP

PS

Photo Strip

PHOTO_STRIP

A2

Update Box

UPDATE_BOX

TL5 TOOLING3.0

EL1

LCD CHAIR

LK7

LINK10NP

LK17

LINK10NP

LK37

LINK10NP

LK47

LINK10NP

LK57

LINK10NP

LK67

LINK10NP

LK77

LINK10NP

LK87

LINK10NP

LK97

LINK10NP

EL2

LCD CHAIR

LK8

LINK10NP

LK18

LINK10NP

LK28

LINK10NP

LK38

LINK10NP

LK58

LINK10NP

LK68

LINK10NP

LK78

LINK10NP

LK88

LINK10NP

LK98

LINK10NP

TL6 TOOLING_OPT

LK9

LINK10NP

LK19

LINK10NP

LK29

LINK10NP

LK39

LINK10NP

LK49

LINK10NP

LK59

LINK10NP

LK69

LINK10NP

LK79

LINK10NP

LK89

LINK10NP

LK99

LINK10NP

FD_1

FIDUCIAL

FD_3

FIDUCIAL

LK10

LINK10NP

LK130

LINK10NP

LK30

LINK10NP

LK40

LINK10NP

LK50

LINK10NP

LK60

LINK10NP

LK70

LINK10NP

LK80

LINK10NP

LK90

LINK10NP

LK107

LINK10NP

LK117

LINK10NP

FD_2

FIDUCIAL

FD_4

FIDUCIAL

LK133

LINK10NP

LK135

LINK10NP

LK126

LINK10NP

LK127

LK121

LINK10NP

LK122

LINK10NP

LK123

LINK10NP

LK124

LINK10NP

LK125

LINK10NP

LK132

LINK10NP

LK136

LINK10NP

Alpha 7 CD Configuration Plug

SK2

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

DIL16 HSKT

R67

47R MF

L887C3_2 L887C3_2.SCH

L887C2_2 L887C2_2.SCH

INOUT FILA FILB 4MHZ

Z4A

1 2

74HC14

+

C1000 10U EL

C58 100N CD

DEEM SMUTE AMUTE

RMIN

PGML

CLK

DATA SCOR SQCK

XRST LDON

XLT

SENSE

SUBQ

LDIN

LDOUT

Z4B

3 4

74HC14

14

Z4G

7

74HC14

R68

330R MF

L887C4_2 L887C4_2.SCH

DEEM SMUTE AMUTE RMIN PGML CLK DATA SCOR SQCK XRST LDON XLT SENSE SUBQ

LDIN LDOUT 4MHZ

Z4C

5 6

74HC14

K0 K1 K0 K1

FILB FILA

INOUT

Z4D

74HC14

Ground decoupling

Z4E

89

74HC14

8

D

C

B

1011

Z4F

1213

74HC14

FOR ROS PROGRAMME INCLUDE A7 FOR ALPHA 7 CD

A

1 2 3 4 5 6 7 8

DRAWING TITLE

CD72, CD92 Project Sheet

A & R Cambridge Ltd. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9PB

Notes:

Filename

G:\DATA\ECO\ECO AGENDA\00_1093 L887PB_2\L887_2\L887_2.ddb - L887c1_2.prj

Circuit Diagram

00_1093 2

00_1083

-

ECO No.

Date Printed

CW 11-10-00 TRACKS MOVED TO CLEAR PILLARS & C64 ADDED FOR EMC

CL 15-09-00 EARTH LINK 8M101 ADDED 1.1

CL 03-08-00 PRODUCTION RELEASE 1

CL 13-07-00 REVISIONS B

WF 07-04-00 A

INITIALS

DAT E

NEW PROTOTYPE

Drawn by:

CW12-Oct-2000

DESCRIPTION OF CHANGE

1 4Sheet of

DRAWING NO.

L887C1_2

A

ISSUE