Arcam DiVA CD72 User manual

CD72/92
DiVA CD72, CD92
Compact Disc Player (Text)
Service Manual
ARCAM
ARCAM
Issue 1.0

Contents List
! Contents list
! Circuit description
! Upgrade procedure
! Service guide
! Circuit diagrams
! Component overlays
! Circuit board parts list
! General assembly parts list

CD72/92 (text) Circuit Description
Summary
The main Motherboard/Display PCBs for the Diva CD players
may be assembled as three different versions:
! DiVA CD62 (text) - With alternate components fitted
and the 92DAC upgrade connections omitted
(L933AY).
! DiVA CD72 (text) - With the standard set of
components fitted (L899AY).
! DiVA CD92 (text) - With analogue components and
connectors omitted, for use as a host motherboard for
the plug-in 92DAC (L934AY).
The CD72T version may be converted for use with an upgrade
plug-in DAC board by changing on-board jumpers.
All systems are based on a Sony kit, comprising CDM14BL-
5BD25 CD transport / loader / laser mechanism, micro-controller
and fluorescent display.
Power Supplies
The CD72/92 transformers :-
! 230/115VAC - part number L866TX
! 100VAC only - part number L851TX
The mains transformer has three secondary windings:
1. 13.7V – 0V – 13.7V to provide ±12V(A) supplies
(IC201 and IC205) for the audio output circuitry via
regulators IC201 and IC205.
2. 9V-0V-32V to produce the digital, motor drive and
fluorescent display grid supplies:
+11V(U) Unregulated supply for relay drive and
+5V(D) supply
+7V (IC200) Mechanism and motor driver
supply
+5V(D) (IC202) General digital logic supply
+5V(A) (IC203) Supply to DAC
-30V (IC204) Display grid voltage.
3. 0-5V to provide an AC supply for the display
filament.
All of these supplies are delivered also to the optional 92DAC
upgrade board via the 92DAC power connector SK203. The
supplies are conventional and are linearly regulated by 3-terminal
voltage regulators.
When the 92DAC upgrade board is used, analogue regulators
IC201 and IC205 can be bypassed by removing JP203 and
JP205, and fitting JP202 and JP204
since regulation is contained
on the 92DAC board itself. Soft-charging resistors R204 and
R205 are be bypassed similarly.
Relay Mute Control
This circuit drives a relay to un-mute the analogue output ~5
seconds after the unit is powered on, and quickly mutes the
output when the unit is switched off. The circuit works
effectively as an “AND” gate.
If AC is present on the transformer secondary winding and the 5-
second timer composed of R222 and C221 has reached the
threshold voltage (Vbe of TR200 + Vbe of TR201 - Vce of
TR202, or ~1.0V), the relay coil is connected to +11V
(referenced to 0V_3 as required by the 9DAC’s internal circuitry)
via TR204.
When AC is removed, C231 discharges quickly through R225,
the base voltage of TR204 rises and the relay coil voltage is
removed, muting the output.
TR203 resets the ‘timer’ by discharging C221 quickly at turn-off.
Remote Control/PIC Micro
Remote controldata is received from the IREye on the display PCB
and buffered by TR300 and TR301. The Programmable Interrupt
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.
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 IC303.
Clock Buffering
The clock and data signals LRCK, ADATA and BCLK from the
mechanism connector SK300 are double buffered by IC300
before being delivered to the DAC.
Power-On/Reset
The power-on reset signal XRST (or RESET) is generated by
R409, C410 and IC404. When the power is turned on, C410 is
initially uncharged and pin 11 of IC404 is at high voltage, and
thus the output is low. After a short time, C410 is charged via
R409; IC404 pin 11 is then low, and the output switches high
(RESET is de-asserted).
DAC & System Clock
The DAC is a Burr Brown PCM1716E, the DAC is configured
for hardware control.
Digital audio is input on pins 1, 2 & 3 in standard Red Book
Audio format, i.e. Word Clock, Bit Clock and Data.
The system clock is based around 16.9344 MHZ crystal X400
and transistor TR402. This produces a stable clock with low
jitter. IC404A & B buffer the clock as linear buffers. IC404C &
D buffer the individual mech & DAC clock lines.
The CD92 system clock is generated on the 92DAC board.
The clock and data signals LRCK, ADATA and BCLK from the
mechanism connector SK300 are double buffered by IC300 before
being delivered to the DAC. The system clock is delivered to the
mech via two-position jumper PL300. The clock source is selected
to be either from the main board (CD62/72) or from the 92DAC
board (CD92) by the position of JP300.
When the 92DAC is fitted as an upgrade to a CD72,
removing JP400 disables the main board clock

Analogue Output
Left channel:
IC400A and IC400B are cascaded 69kHz 2nd order low-pass
Bessel filters. The output devices internal to both op-amps in
IC400 are “pulled down” to the negative supply rail to force
operation in class A (one output device is conducting at all times
and crossover distortion is eliminated).
IC402A is a DC servo with a very low cut off frequency, acting
to impose a non-zero voltage ‘virtual earth’ at the non-inverting
input of IC400B, thus eliminating the offsets caused by the pull-
down resistors and DC-coupling the output.
The right channel is the same as the left channel. IC401A & B
are used as the buffer and filter.
Microcontroller & Display Board
The system microcontroller IC100 serves the following functions:
! Control of the mechanism & decoder on the CDM14
mechanism
! Control of mute, attenuation and de-emphasis for the
DAC
! Direct drive of the fluorescent display
! Remote control decoding
! Keyboard scanning
! 92DAC muting
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, which the micro is pre-programmed
to interpret accordingly.
The remote control data contains a ‘Customer Code’ that
identifies this as an Arcam product. The diode network D100 to
D106 configures the micro to accept this code.
Remote Bus Carrier Filter & Demodulator
Remote control commands can be delivered over wire to SK500
for multi-room applications. Incoming signals are attenuated and
clipped by resistors and D500. L500 and C508 form a parallel
resonant circuit at approximately 37kHz. This demodulates the
incoming signal and the output is passed to IC501A where it is
‘chopped’, low pass filtered and fed to IC501B to provide the
RC5 output signal.
Digital Output
The decoder on the mechanism assembly generates an SPDIF
format digital output signal. This is passed to buffer IC500A.
IC500B through E are used in parallel to provide a transformer
less 75-ohm source impedance to a single phono socket SK501.
Optical digital output via IC502 is also tapped off the digital
output signal via IC500F.

Jumper Settings / Technical Specifications
Jumper Description Jumper CD62T
Settings
CD72T
Settings
CD92T
Settings
Filter smoothing disable PL200 Not fitted Off On
Filter smoothing disable PL201 Not fitted Off On
IC201 Regulator bypass PL202 Not fitted Off On
IC201 Regulator output
enable PL203 On On Off
IC205 Regulator bypass PL204 Not fitted Off On
IC205 Regulator output
enable PL205 On On Off
System clock source
select PL300 Pin1 & 2 Pins 1 & 2 Pins 2 & 3
Main board clock power
enable PL400 On On Off
Main board PCM1716E
DAC enable PL401 On On Off
Main board output relay
enable PL402 On On Off
CD62T / CD72T
CD Mechanism Sony CDM14BL-5BD25
Laser pick-up 3 beam
DAC conversion system Multi-level Delta Sigma
Effective resolution 16 bits (24 bit capable DAC)
Dynamic Range 100dB
Signal to Noise ratio (CCIR) >104dB
Harmonic distortion (0dBFS 1kHz) <0.005%
Harmonic distortion (0dBFS 10kHz) <0.005%
Frequency response (-0.7dB) < 10Hz to 20kHz
Output level (0dBFS) 2.3VRMS
Output impedance 120 ohms
Minimum recommended load 5 kΩ
Coaxial digital output (75 ohm) Class 2
Power consumption (max) 32VA
Size W/D/H (mm) 430x290x84
Weight, net 4.6kg (CD92T 5.6kg)

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
4
22
1
6

CD72 / CD92 (Text) 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 Caused by failure of clock signal to the mech
Check mech supply
Check clock signal
No Display Check filament voltage 3.1vac
Check flex foil cable
Check for dry joints on micro and
display
Spurious display readout Check for dry joints on display board
Power supply test points
Position Voltage
DGND 0 volts
PL203 +12 volts
PL205 -12 volts
IC200 o/p +7.3 volts - mech supply
IC203 o/p +5 volts - DAC supply
IC202 o/p +5 volts - Digital supply
IC204 o/p -30 volts
Between R227 & R228 3.1 volts AC – display filament
Hints & tips
! When upgrading from CD72 text to CD92 text remember to fit the steel plate to the
transformer, this reduces noise.
! Voltage conversion 230/115VAC by changing the internal fuse position and fitting the correct
rated fuse. 100VAC requires a different transformer.

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J:\Change_Control\ECO_AGENDA\01_1123 L899PB_2 RELEASE\L899_2.1\L899_2.1.DDB - L899C6_2.1.prj
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
NEW CD - TOP LEVEL SCHEMATIC
Circuit Diagram
L899CT
JR
12-Jul-2001
INITIALS
Date Printed 6 7Sheet of
Notes:
FILA
FILB
L899C2_2
L899C2_2.1.sch FILA
FILB BCLK ADATA
LRCKRC5 IP
17MHZ
RESET DIGOP EMPHASIS
L899C3_2
L899C3_2.1.sch DEEM
LRCK
ADATA
BCLK
RESET
17MHZ
L899C4_2
L899C4_2.1.sch
DIGOP RC5RP
L899C5_2
L899C5_2.1.sch
POWER SUPPLIES MECH INTERCONNECTS DAC AND OSCILLATOR
RC5 INPUT AND DIG OUTPUTS
0V_1
0V_2
0V_SIG
0V_MOT
0V_DIG
0V_30V_9DAC
FIX151
FIXING HOLE 3.2 FIX150 FIXING HOLE 3.5
FIX152
FIXING HOLE 3.5 FIX153 FIXING HOLE 3.5
FIX157
FIXING HOLE 3.2 FIX155 FIXING HOLE 3.5 FIX156 FIXING HOLE 3.5
FIX154
FIXING HOLE 3.5
(EARTH BY IEC SOCKET)
C150
1N0 CD C151 1N0 CD C152 1N0 CD C153 1N0 CD C154 1N0 CD C155 1N0 CD C156 1N0 CD
0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG
SP100
STARPOINT
L899C7_2
L899C7_2.1.sch
L899C1_2
L899C1_2.1.sch
DISPLAY PCB
DISPLAY AND MICROCONTROLLER
1.0
0V_DIG 0V_9DAC
LK601
0R0 MF
LK600
0R0 MF
01_1115
01_1123 2.1CL 11/07/01

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A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
NEW CD - POWER SUPPLIES
Circuit Diagram
L899CT
JR
12-Jul-2001
INITIALS
Date Printed 2 7Sheet of
Notes:
L N E
NEL
SK200
IEC3
C200
3N3(X1Y2)
C201
3N3(X1Y2)
C203
220N(X2)
NEUTRAL LIVE
20
11
1
6
230V
115V
9
19
15
18
16
17
13
4
5
10
2
7
TX200
L866TX
NEUTRAL2
L200
6U8H L201 6U8H
NEUTRAL2
FS201
T160MA
FS200
T250MA115V
230V ONLY
115V ONLY
EARTH LEAD
8M101
EL200
EARTH LEAD
(IEC INLET TO CHASSIS)
1
2
3
4
5
6
SK202
MOLEXPWR6
(FOR AUX TOROID)
SW200B
A1010
SW200A
A1010
LIVE2
C202
3N3(X1Y2)
C204
100N CD
C205
100N CD
C206
100N CD
C207
100N CD
C208
100N CD
R200
1R0 FU
R201
1R0 FU
BR201
DF01M
+C211
1M0 35V
+C212
1M0 35V
1 2
PL200
2WVERTJUMPER
1 2
PL201
2WVERTJUMPER
JP200
JUMPER
JP201
JUMPER
Vin
I
ADJ
A
Vout O
IC201 LM317T
Vin
I
ADJ A
Vout O
IC205 LM337T
R208
1K8 MF
R209
1K8 MF
R206
220R MF
R207
220R MF
+C216
100U EL
+C217
100U EL
D203
1N4148
D204
1N4148
1 2
PL203
2WVERTJUMPER
1 2
PL205
2WVERTJUMPER
1 2
PL204
2WVERTJUMPER
1 2
PL202
2WVERTJUMPER
JP202
JUMPER
JP203
JUMPER
JP205
JUMPER
JP204
JUMPER
+12V(A)
-12V(A)
0V_1
BR200
DF01M +C210
3M3 EL
Vin
I
ADJ
A
Vout O
IC200
LM1086-ADJ
R203
330R MF
R214
1K6 MF
+C218
100U EL
D201
1N4148
D200
1N4148
D202
1N4148
D207
1N4148
+C228
1M0 10V
+7V
0V_2
HS201
TO220HS30REG
+11V(U)
1 2
3 4
SK201
MOLEXPWR4
(FOR AUX TOROID)
Vin
I
ADJ
A
Vout O
IC202
LM317T
R218
270R MF
R220
820R MF
+C219
100U EL
D208
1N4148
C209
100N CD
D206
1N4148
+C220
100U EL
+5V(D)
0V_2
HS
HS200
TO220HS08REG
+11V(U)
Vin
I
ADJ
A
Vout O
IC203
LM317T
R219
270R MF
R221
820R MF
+C222
100U EL
D212
1N4148
D211
1N4148 +5V(A)
0V_1
Motor drive supply
Analogue op-amp supplies
DAC supply
Digital +5V
C215
100N PE
+C223
1M0 25V
+C224
1M0 25V
R204
10R MF
R205
10R MF
+C229
1M0 10V
R211
10R FU
D213
1N4003
+C225
100U EL 100V
Vin
I
ADJ A
Vout O
IC204LM337T
R216
1K0 MF
R215
22K MF
+C227
100U EL 100V
D205
1N4148
-30VF
R217
33K MF
FILA
FILB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23 SK203
FFC23V
+12V(A)
0V_9DAC
-12V(A)
+5V(A)
+5V(D)
+11V(U)
Power connector for 9DAC PCB
+C226
100U EL 100V
C213
100N PE
C214
100N PE
D209
1N4148
D210
1N4148
0V_3
R224
10K MF
+
C230
100U EL
+
C231
10U EL
AC1
AC2
AC1
Relay control for AC detect
HS202
TO220HS30REG
Filiament supply
1.0
115V
230V
AC_3
TX_19
TX_20
TX_16
TX_18
BLU
BLU
BRN BRN
NB: CABLE ASSEMBLY L920CA GOES BETWEEN
BRN BRN AND BLU BLU FROM MAINS SWITCH TO BACK OF PCB
R2101R0 FU
R212
1R0 FU
R228
100R MF
R227
100R MF
RLYPWR
D214
5V1 400MW
NF
NF
R202
1M5 VR25
R223
10K MF
R213
10R FU
D215
1N4148
+
C221
100U EL
TR204
BC557B
R229
1K5 MF
R226
10K MF
AC2
R230
10K MF
0V_3
0V_3
R225
2K2 MF
R222
470K MF
TR200
BC549B
TR201
BC549B
TR202
BC549B TR203
BC549B
L920CA ADDED TO SCM01_1117
01_1123 2.1CL 11/07/01
L920CA
CA1
L920CA
NF
NF
NF
NF

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J:\Change_Control\ECO_AGENDA\01_1123 L899PB_2 RELEASE\L899_2.1\L899_2.1.DDB - L899C3_2.1.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
NEW CD - MECH CONNECTS, MOTOR DRIVE AND IR MICRO
Circuit Diagram
L899CT
JR
12-Jul-2001
INITIALS Date Printed 3 7Sheet of
Notes:
FILA FILB
Flexfoil connector to Display PCB
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 28 29 30 31 32
SK302
FFC32V
Data connector to DAC PCB
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 28 29 30 31 32
SK301
FFC32V
HDCD DEEM RA0 RB6 RB5 RB4 RB0 XRST AMUTE
BCLK
DATA
CLK
SUBQ
SENS
XLT
LDON
AMUTE
SQCK
SCOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
SK300
FFC23V
XRST
LPH
RA2
1
RA3
2
RTCC
3
MCLR
4
VSS
5
RB0 6
RB1 7
RB2 8
RB3 9
RB4 10
RB5 11
RB6 12
RB7 13
VDD
14
OSC2
15
OSC1
16
RA0
17
RA1
18
IC302
PIC16C54XT
RA0
AMUTE RB0
RB4
RB5
RB6
RMIN
XRST
+5V(D)
R311
100K MF
+5V(D)
DEEM
IREYE
C304
100P CD
D300
1N4148
+5V(D)
BCLK
ADATA
LRCK
GND 1
O/P 'In' 2
3
Bias 4
LoadIn 5
LoadOut 6
Vcc 7
Vcc 8
9
O/P 'Out' 10
IC303
LB1641 1
2
3
4
5
SK303
8K2005
C307
10N CD
D301
4V7 400MW
LOADOUT
LOADIN
GND
INSW
OUTSW
+7V
R312
6K8 MF
C303
100N CD
+C306
100U EL
X300
CST4.00
C302
100N CD
+C305
100U EL
C300
100N CD
+5V(D)
Flex connector from CDM14BL-5BD25 mech
R300
330R MF
R304
330R MF
R306
330R MF
R309
10K MF
R308
10K MF
R310
10K MF
R307
10K MF
RC5 IP +5V(D)
0V_DIG
+7V
ADATA
LRCK
0V_DIG
+5V(D)
0V_9DAC
R301
330R MF
R302
330R MF
R305
330R MF
C301
100N CD
0V_DIG
LRCK
ADATA
BCLK
17MHZ
TR300
BC549B
TR301
BC549B
0V_DIG
0V_DIG
0V_DIG
RESET
-30VF
+5V(D)
0V_DIG
SCOR IREYE RMIN HDCD LDOUT LDIN SENS XLT AMUTE CLK LDON DATA SQCK SUBQ LOADSW XRST LPH DEEM
DIGOP
0V_MOT
0V_MOT LOADSW
LDIN
LDOUT
EMPHASIS
Motor Drive
R303
6K8 MF
+5V(D)
C308
100N CD
(From 9 DAC PCB)
1
2
3
PL300
3WVERTJUMPER
JP300
JUMPER
(Master clock select jumper)
(From crystal oscillator)
1.0
R313
100K MF
R314
10K MF
0V_DIG
R315
10K MF
0V_DIG
1 2
IC300A
74HCU04
3 4
IC300B
74HCU04
5 6
IC300C
74HCU04
89
IC300D
74HCU04
1011
IC300E
74HCU04
1213
IC300F
74HCU04
14
7
IC300G
74HCU04
01_1118
01_1123 2.1CL 11/07/01

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Filename ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_AGENDA\01_1123 L899PB_2 RELEASE\L899_2.1\L899_2.1.DDB - L899C4_2.1.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
NEW CD - DAC, OSCILLATOR AND ANALOGUE OUTPUTS
Circuit Diagram
L899CT
JR
12-Jul-2001
INITIALS
Date Printed 4 7Sheet of
Notes:
X400
16.9344MHZ
C441
33P CD
R426
33K MF
R427
33K MF
C438
100P CD
C439
100P CD R430
1K0 MF
TR402
BC547B
C412
10N CD
C440
1N0 CD
3 4
IC404B
74HCU04
1 2
IC404A
74HCU04 5 6
IC404C
74HCU04
1011
IC404E
74HCU04
89
IC404D
74HCU04
14
7
IC404G
74HCU04
R429
4M7 MF
R428
330R MF
+C436
22U EL OS
L403
33UH AX
C437
10N CD
0V_DIG
DEEM
+5V(DAC)
0V_SIG
+C430
10U SILMIC
+C432
10U SILMIC
0V_SIG
+C431
10U SILMIC
C409
100N PE
0V_SIG
+5V(DAC)
+C428
10U SILMIC
C401
100N PE
0V_DIG
+5V(DAC)
0V_DIG
+C429
10U SILMIC
0V_SIG
+
C433
10U SILMIC
0V_SIG
+5V(DAC)
C408
100N PE
+5V(DAC)
R409
10K MF
D400
1N4148
0V_DIG
+5V(D)
R413
4K7 MF
R415
2K7 MF
R410
6K8 MF
C416
560P PP
C418
220P PP
R416
2K7 MF
R403
1K8 MF
C422
1N3 PP
C420
220P PP
R419
3K9 MF
3
21
IC400A
NJM2114
5
67
IC400B
NJM2114
0V_SIG
84
IC400C
NJM2114
3
2
1
IC402A
TL072
84
IC402C
TL072
C424
470N PE
0V_SIG
R421
1M0 MF
R414
4K7 MF
R417
2K7 MF
R411
6K8 MF
C417
560P PP
C419
220P PP
R418
2K7 MF
R404
1K8 MF
C423
1N3 PP
C421
220P PP
R420
3K9 MF
3
21
IC401A
NJM2114
5
67
IC401B
NJM2114
0V_SIG
5
6
7
IC402B
TL072
C425
470N PE
R422
1M0 MF
84
IC401C
NJM2114
C402
100N PE
C403
100N PE
C404
100N PE
C405
100N PE
C406
100N PE
C407
100N PE
+12V(A)
-12V(A)
0V_SIG R405
120R MF
R406
120R MF
0V_SIG
0V_SIG
1
EMC
SK400
PHONO2HG
0V_SIG
0V_SIG
C434
100N CD
EMC1
EMC1
0V_DIG
0V_DIG
R400
330R MF
R425
1M0 MF
1213
IC404F
74HCU04
R401
330R MF
R408
120R MF
R407
120R MF
C400
100N CD
1
2
PL400
2WVERTJUMPER
JP400
JUMPER
+5V(D)
+5V(A)
LRCK
ADATA
BCLK
+C410
100U EL
RESET
17MHZ
0V_SIG
C426
3N3 PP
C427
3N3 PP
DACLK
DACLK
1 2
PL401
2WVERTJUMPER
JP401
JUMPER
(DAC enable jumper)
R432
10K MF
R439
1M0 MF
C442
100N PE
C443
100N PE
C435
100N PE
C415
100N PE
R431
10K MF
+5V(DAC)
R402
4K7 MF R412 4K7 MF
0V_SIG
C446
10P CD
C447
10P CD
0V_DIG
0V_DIG
L400
7F003
C414
100N CD
L402
7F003
C413
100N CD
R435
680R MF
R436
680R MF
-12V(A)
-12V(A)
R433
1K0 MF
R434
1K0 MF
-12V(A)
-12V(A)
R437
100K MF
R438
100K MF
(Oscillator enable jumper)
(Master clock to DAC)
(Master clock to mech)
Output filter
Output filter
1.0
EMC Shield
SH400
EMCPHONO
LRCIN
1
DIN
2
BCKIN
3
CLKO
4
XTI
5
XTO
6
DGND
7
Vdd
8
Vcc2R
9
AGND2R
10
EXT1R
11
NC
12
VOUTR
13
AGND1
14 Vcc 15
VOUTL 16
NC 17
EXTL 18
AGND2L 19
Vcc2L 20
ZERO 21
RST 22
CS/IWO 23
MODE 24
MUTE 25
MD/DM0 26
MC/DM1 27
ML/IIS 28
IC403
PCM1716#
R423
22K MF
R424
22K MF
+
C448
10u CERA
+
C449
10u CERA
R442
2K2 MF
R443
2K2 MF
0V_SIG
0V_SIG
NF
NF
NF
NF
L401
7F003
C411
100N PE
L404
7F003 C444
100N PE
D402
1N4148
LK400
LINK10PAD
LK401
LINK10PAD
RLY400A
DPDT
RLY400B
DPDT
0V_SIG
0V_SIG
RLY400C
DPDT
0V_3
RLYPWR
D401
1N4148
NF
NF
C445
100N PE
C450
100N PE
1
2
PL402
2WVERTJUMPER
JP402
JUMPER
01_1119
01_1123 2.1CL 11/07/01

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Filename ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_AGENDA\01_1123 L899PB_2 RELEASE\L899_2.1\L899_2.1.DDB - L899C5_2.1.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
NEW CD - REAR PANEL RC5 & DIGITAL OUTPUT
Circuit Diagram
L899CT
JR
12-Jul-2001
INITIALS Date Printed 5 7Sheet of
Notes:
R516
1K2 MF
EMC
SK501
PHONO1
+C506
22U EL OS
C501
10N CD
1 2
IC500A
74HCU04
5 6
IC500C
74HCU04
3 4
IC500B
74HCU04
89
IC500D
74HCU04
1011
IC500E
74HCU04
1213
IC500F
74HCU04
14
7
IC500G
74HCU04
+5V(D)
R500
10R MF
0V_DIG
+5V(D)
0V_DIG
0V_DIG
R517
1K2 MF
R518
1K2 MF
R505
120R MF
R506
1K2 MF
DIGOP
C502
470N PE
0V_DIG
R501
10R MF
L500
27mH C508
680P PP
+5V(D)
RC5RP
CARRIER FILTER AND DEMODULATOR
R511
470R MF
R504
1K0 MF
R512
100K MF
D500
4V7 400MW
R507
10K MF
R508
10K MF
R502
1K8 MF
R514
1K5 MF
R503
1K8 MF
R510
10K MF
R509
10K MF
R513
100K MF
C503
1N0 CD
C500
100N CD
3
21
IC501A
LM393A
5
6
7
IC501B
LM393A
84
IC501C
LM393A
OPTICAL OUTPUT
COAXIAL OUTPUT
SK500
JACK3.5
VCC 2
GND
3
I/P
1
IC502
GP1FA550TZ
1.0
C507
100N CD
C510
100P CD
R519
100R MF C512
470P CD
C505
100N CD C504
10N CD
C511
100N CD
R515
10K MF
C509
100N CD
EMC1
C513
100P CD
LK500
LINK10NP
01_1120
01_1123 2.1CL 11/07/01

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Filename ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_AGENDA\01_1123 L899PB_2 RELEASE\L899_2.1\L899_2.1.DDB - L899C7_2.1.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
NEW CD - LINKS AND MECH PARTS
Circuit Diagram
L899CT
JR
12-Jul-2001
INITIALS Date Printed 7 7Sheet of
Notes:
Update Box
EL1
UPDATE_BOX
LK701
LINK10NP
LK702
LINK10NP
LK703
LINK10NP
LK704
LINK10NP
LK757
LINK10NP
LK758
LINK10NP
LK759
LINK10NP
LK760
LINK10NP
LK761
LINK10NP
LK762
LINK10NP
LK705
LINK10NP
LK706
LINK10NP
LK707
LINK10NP
LK708
LINK10NP
LK763
LINK10NP
LK764
LINK10NP
LK765
LINK10NP
LK766
LINK10NP
LK767
LINK10NP
LK768
LINK10NP
LK709
LINK10NP
LK710
LINK10NP
LK711
LINK10NP
LK712
LINK10NP
LK769
LINK10NP
LK770
LINK10NP
LK771
LINK10NP
LK772
LINK10NP
LK773
LINK10NP
LK774
LINK10NP
LK713
LINK10NP
LK714
LINK10NP
LK715
LINK10NP
LK716
LINK10NP
LK775
LINK10NP
LK776
LINK10NP
LK777
LINK10NP
LK778
LINK10NP
LK779
LINK10NP
LK780
LINK10NP
LK717
LINK10NP
LK718
LINK10NP
LK719
LINK10NP
LK720
LINK10NP
LK781
LINK10NP
LK782
LINK10NP
LK783
LINK10NP
LK784
LINK10NP
LK785
LINK10NP
LK786
LINK10NP
LK721
LINK10NP
LK722
LINK10NP
LK723
LINK10NP
LK724
LINK10NP
LK787
LINK10NP
LK788
LINK10NP
LK789
LINK10NP
LK790
LINK10NP
LK791
LINK10NP
LK792
LINK10NP
LK725
LINK10NP
LK726
LINK10NP
LK727
LINK10NP
LK728
LINK10NP
LK793
LINK10NP
LK794
LINK10NP
LK795
LINK10NP
LK796
LINK10NP
LK797
LINK10NP
LK798
LINK10NP
LK729
LINK10NP
LK730
LINK10NP
LK731
LINK10NP
LK732
LINK10NP
LK799
LINK10NP
LK800
LINK10NP
LK801
LINK10NP
LK802
LINK10NP
LK803
LINK10NP
LK804
LINK10NP
LK733
LINK10NP
LK734
LINK10NP
LK735
LINK10NP
LK736
LINK10NP
LK805
LINK10NP
LK806
LINK10NP
LK807
LINK10NP
LK808
LINK10NP
LK809
LINK10NP
LK810
LINK10NP
LK737
LINK10NP
LK738
LINK10NP
LK739
LINK10NP
LK740
LINK10NP
LK811
LINK10NP
LK812
LINK10NP
LK813
LINK10NP
LK814
LINK10NP
LK815
LINK10NP
LK741
LINK10NP
LK742
LINK10NP
LK743
LINK10NP
LK744
LINK10NP
LK745
LINK10NP
LK746
LINK10NP
LK747
LINK10NP
LK748
LINK10NP
LK749
LINK10NP
LK750
LINK10NP
LK751
LINK10NP
LK752
LINK10NP
LK753
LINK10NP
LK754
LINK10NP
LK755
LINK10NP
LK756
LINK10NP
LK100
LINK10NP
LK101
LINK10NP
LK102
LINK10NP
LK103
LINK10NP
LK104
LINK10NP
LK105
LINK10NP
LK106
LINK10NP
LK107
LINK10NP
LK108
LINK10NP
LK109
LINK10NP
LK110
LINK10NP
LK111
LINK10NP
LK112
LINK10NP
LK113
LINK10NP
LK114
LINK10NP
LK115
LINK10NP
LK116
LINK10NP
LK117
LINK10NP
LK118
LINK10NP
LK119
LINK10NP
LK120
LINK10NP
LK121
LINK10NP
LK122
LINK10NP
LK123
LINK10NP
LK124
LINK10NP
LK125
LINK10NP
LK126
LINK10NP
LK127
LINK10NP
LK128
LINK10NP
LK129
LINK10NP
LK130
LINK10NP
LK131
LINK10NP
1.0
LK132
LINK10NP
LK135
LINK10NP
LK134
LINK10NP
LK133
LINK10NP
LK136
LINK10NP
LK816
LINK10NP
LK817
LINK10NP
LK818
LINK10NP
LK819
LINK10NP
S/W
IC302SW
L825SW
01_1121
01_1123 2.1CL 11/07/01
PCB
PB
L899PB

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Filename ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_AGENDA\01_1123 L899PB_2 RELEASE\L899_2.1\L899_2.1.DDB - L899C1_2.1.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
NEW CD - DISPLAY AND SYSTEM MICRO
Circuit Diagram
L899CT
JR
12-Jul-2001
INITIALS Date Printed 1 7Sheet of
Notes:
13G
1
14G
2
NC
3
CMI1
4
SCOR
5
CMI2
6
CMI3
7
RMIN
8
CMI4
9
NC
10
NC
11
LDOUT
12
LDIN
13
SENS
14
XLT
15
AMUTE
16
PGML
17
NC
18
NC
19
TIMER
20
NC
21
CLK
22
LDON
23
DATA
24
KEY2
31
KEY3
32
ADJ/AFADJ
33
LOADSW
34
NC
35
NC
36
AVSS
37
RST
38
EXTAL
39
XTAL
40
VSS
41
NC
42
NC
43
VDD
44
VDP
45
NC
46
CMO4 57
EMPHASIS 58
NC 59
NC 60
NC 61
NC 62
NC 63
NC 64
NC 65
NC 66
S21 67
S20 68
S19 69
S18 70
S17 71
S16 72
S15 73
S14 74
S13 75
S12 76
S11 77
S10 78
S9 79
S8 80
S3 85 S2 86 S1 87
1G 88
VDD 89
2G 90 3G 91 4G 92 5G 93 6G 94 7G 95 8G 96 9G 97
10G 98 11G 99 12G 100
SQCK
25
SUBQ
26
NC
27
AVREF
28
KEY0
29
KEY1
30
NC
47
LPH
48
NC
49
NC
50
CMO3 56
CMO2 55
CMO1 54
NC 53
NC 52
NC 51
S4 84 S5 83 S6 82 S7 81
IC100
CXP82832
F1
1
F1
2
14G
4
13G
5
12G
6
11G
7
10G
8
9G
9
8G
10
7G
11
6G
12
5G
13
4G
14
3G
15
2G
16
1G
17
NC
18
P1
19
P2
20
P3
21
P4
22
P5
23
P6
24
P7
25
P8
26
P9
27
P10
28
P11
29
P12
30
P13
31
P14
32
P15
33
P16
34
P17
35
P18
36
P19
37
P20
38
P21
39
F2
41
F2
42
DISP100
DISPLAY 14-ST-20GK
R102
10K MF
NEXT PREV FF FR PAUSE STOP PLAY OPEN
C129
10N CD
CMO4
CMO3
CMO2
CMO1
D102
1N4148
D103
1N4148
D104
1N4148
D105
1N4148
D100
1N4148
D101
1N4148
D106
1N4148
CMO1 CMO2 CMO3 CMO4
REMOTE CUSTOM CODE DIODE MATRIX
+C110
10U EL
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
28
29
30
31
32
SK100
FFC32H
R100
220R MF
LED100
LED GREEN3.1MM
C109
100N CD R104
6K8 MF R105
6K8 MF
R106
6K8 MF
R107
6K8 MF
F2F1
-30V
+5V
+5V
C108
100N CD
+5V
+5V
HDCD LED
+5V
-30V
DECOUPLING CAPACITORS FOR IC100
POWER LED
R112
680R MF
R111
1K0 MF
R110
1K5 MF
R109
2K2 MF
R108
3K3 MF
R103
6K8 MF
R101
10K MF
0V
0V
0V
0V
0V
+5V 3
O/P
2
GND
1
Case Case
O/P
GND +5V
RX100
SBX1610-52/PIC-26043TM2
Connector to main PCB
0V
0V
-30V
+5V
+C103
100U 25V ZA EL
FIX101
FIXING HOLE 3.2
FIX100
FIXING HOLE 3.2
CHASSIS
FIX102
FIXING HOLE 3.5FIX103 FIXING HOLE 3.5
C101
1N0 CD
C100
1N0 CD C102 1N0 CD
0V 0V
(NEAR SK100)
0V
(NEAR SK100)
0V
0V
R113
10R MF
PIN 1 TO LEFT
CABLE POINTING DOWN
1.0
IR_DISP
C104
100N CD C105 100N CD C106 100N CD
C107
100N CD
E916MC
1 2 3 4
E1
CDTXT VFD SUPPORT
0V
CHASSIS2
R114 10K MF
R115 10K MF
R116 10K MF
R117 10K MF
0V
X100
CST8.00
F1
F2
IR_DISP
SCOR_DISP
RMIN_DISP
LDOUT_DISP
LDIN_DISP
SENS_DISP
XLT_DISP
AMUTE_DISP
CLK_DISP
LDON_DISP
DATA_DISP
SQCK_DISP
SUBQ_DISP
LOADSW_DISP
XRST_DISP
DEEM_DISP
HDCD_DISP
LPH_DISP
IR RX
SUPPORT PAD
SP104
IR RX SUPPORT PAD
SW100 SW101 SW102 SW103 SW104 SW105 SW106 SW107
LED
SPACER
SP102
SPACER F195
01_1116
01_1123 2.1CL 11/07/01
70mm x 12mm
DOUBLE SIDED
STICKY GASKET
SP103
70X12_DS STICKY TAPE
LED101
LED ULTRARED

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Filename ECO No. DESCRIPTION OF CHANGE
J:\FILES\L-ELECT\PCB complete packages\l900s\l912 New 2000 DAC\L912_2.0\L912_2.0.DDB - L912C1_2.0.prj
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
9 CD DAC PCB Top
Circuit Diagram
L912CT
CW
28-Jun-2001
INITIALS Date Printed 1 8Sheet of
Notes:
VCCD
GND
CCLK
DOR
DOL
WCKO
BCKO
WR
DSP
SER_CLK
SER_DIN
SER_CH
D[0..7]
SEL[0..2]
RDYO
INTR
A[0..15]
L[0..15]
R[0..15]
CLK17M_5V_FPGA
GO
M0
M2
DONE
MODE0
MODE1
LDC
AA[0..15]
A/D
NMODE
PMODE
MUTE
HDCD
FPGA
L912C2_2.0.SCH
VCC
28 GND
14
OE/VPP
22 CE
20
A0
10 A1
9A2
8A3
7A4
6A5
5A6
4A7
3A8
25 A9
24 A10
21 A11
23 A12
2A13
26 A14
27 A15
1
D0 11
D1 12
D2 13
D3 15
D4 16
D5 17
D6 18
D7 19
IC31
27C512
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
D0
D1
D2
D3
D4
D5
D6
D7
D[0..7]
A[0..15]
L[0..15]
R[0..15]
SEL[0..2]
L[0..15]
SEL[0..2]
R[0..15]
RDY
AA[0..15]
PMODE
NMODE
A/D
MUTERLY
ASIC DAC
L912C4_2.0.SCH
GO
GAIN
POWER SUPPLY
L912C7_2.0.SCH
R145 15K SM R162
15K SM
DONE
INTR
VCCD
R9 100K SM
VCCD
R3 0R0 SM
*
R144
0R0 SM
DONE *
VCCD
C110 10N SM
+5VCLK
TR25
BC849B
R114
100K SM
R23
2K2 SM
R8
4K7 SM
TR1
BC849B
D3
BAS16W SM
RLY_GND
RLYPWR
RA0
XRST
Power ON/OFF MUTE relay
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
28
29
30
31
32
SK3
FFC32V
CLKMECH
SER_CLK
SER_DIN
SER_CH
HDCDLED
XRST
DEEMPH
RA0
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
MUTE
HDCDLED
RB0
RB6
*
RB[0..7]
R106
10K SM
R117
1K0 SM
R87
1K0 SM
R85
10K SM
VCCD VCCD
RB4 RB5
DSP HDCD
PCB ID
M2
M0
R28
0R0 SM DSP
RDYO
RDY
BCKO
WCKO
DOL
DOR
MUTERLY
CLK17M_5V_DAC
CLK17M_3V_LATCH
CLKMECH
XRST
GO
CLK17M_3V_PMD200
CLK17M_5V_FPGA
CLOCK
L912C8_2.0.SCH
CLKMECH
CLK17M
CLKMECH
SER_CLK
SER_DIN
SER_CH
MUTE
XRST
DEEMPH
RA0
RB7
RB6
RB5
RB4
RB0
RB1
RB2
RB3
HDCDLED
DGND
C159
10N SM
LDC
XRST
GO
GO
FD_1
FIDUCIAL
FD_2
FIDUCIAL
RLY1C
RLY 51SB12T
SER_CLK
SER_DIN
SER_CH
CLK17M_3V_LATCH
CLK17M_3V_PMD200
BCKO
DOL
DOR
WCKO
GAIN
HDCDLED
DEEMPH
MUTE
GO
HDCD
RE-LATCH
L912C9_2.0.SCH
1
24
3 5
IC21
74AHC1G00 SM
AA[0..15]
MUTE
HDCD
HDCD
L11
10UH SM
R111
10R SM
THL6
TOOLING THL4 TOOLING
GO
TR18
BC849B
R74 100K SM
GAIN
THL5
FIXING HOLE
Paper Marker
A3 Vertical
DD1
DD_A3V
Detail
Drilling
DD2
DRILL_DWG
FD_3
FIDUCIAL
FD_4
FIDUCIAL
FD_5
FIDUCIAL
FD_6
FIDUCIAL
FD_7
FIDUCIAL
R166 4K7 SM
+C163
220U EL
FR4, 1 OZ Cu
PCB MATERIAL
MULTI LAYER
DD3
FR4_MULTI
C170
10N SM
C171
10N SM
D[0..7]
R13
10K SM
CLK_PMD200
CLK_FPGA
CLK_FPGA
CLK_PMD200
CLK_LATCH
CLK_DAC
CLK_LATCH
CLK_DAC
GAIN
GO
C88
100N SM
R12
10K SM
R4
10K SM
VCCD
CCLK
WR
MUTERLY
C132
1N 0805 C133 1N 0805 C134 1N 0805
C136
1N 0805 C137 1N 0805
THL1
FIXING HOLE 3.0 THL2 FIXING HOLE 3.0THL3 FIXING HOLE 3.0
THL7
FIXING HOLE 3.0 THL8 FIXING HOLE 3.0THL9 FIXING HOLE 3.0
Update Box
EL1
UPDATE_BOX
FD_8
FIDUCIAL
USE NF FILTER WHEN RUNNING RS
PROGRAM
PCB
PB
L912PB_2
01_1078 CW 1-5-01 Production release 1.0
01_1084 1.1CW 30-4-01 Listening component changes
CW 9-6-01 2.0

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Filename ECO No. DESCRIPTION OF CHANGE
J:\FILES\L-ELECT\PCB complete packages\l900s\l912 New 2000 DAC\L912_2.0\L912_2.0.DDB - L912C2_2.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
9 CD DAC DRIVER
Circuit Diagram
L912CT
CW
28-Jun-2001
INITIALS Date Printed 2 8Sheet of
Notes:
VSS1 1 VSS2 2
IO1 3
IO2/A0 4
IO3 5 IO4 6
IO5/A1 7 IO6/A2 8
IO7 9 IO8 10
IO9/A3 11
VDD1 12
IO10 13 IO11 14 IO12 15
IO13/A4 16 IO14/A5 17
IO15 18 IO16 19
IO17/A6 20
VSS3 21
IO18 22 IO19 23 IO20 24
IO21/A7 25
VDD2 26
IO22 27 IO23 28 IO24 29
IO25/A8 30
VSS4 31
IO26/A9 32
IO27 33 IO28 34
IO29/A10 35
IO30 36 IO31 37 IO32 38
IO33/A11 39
VDD3 40
IO34/A12 41
IO35 42 IO36 43
IO37/A13 44
IO38 45
IO39/A14 46
IO40 47 IO41 48 IO42 49
IO43/A15 50
VSS5 51
CCLK 52
VSS6
53
VSS7
54
IO44/A16
55
IO45
56
IO46
57
IO47
58
IO48/A17
59
IO49
60
IO50
61
IO51
62
IO52
63
IO53
64
VDD4
65
IO54
66
IO55
67
IO56
68
IO57
69
IO58
70
IO59
71
IO60
72
IO61
73
VSS8
74
IO62
75
IO63
76
IO64
77
IO65
78
VSS9
79
IO66
80
IO67
81
IO68
82
IO69
83
VSS10
84
IO70
85
IO71
86
IO72
87
IO73
88
IO74/HDC
89
IO75
90
IO76
91
IO77
92
VDD5
93
IO78/LDC
94
IO79
95
IO80
96
IO81
97
IO82/INIT
98
IO83
99
IO84
100
IO85
101
IO86
102
VSS11
103
DONE
104
VSS12
105
RESET
106
PGRM
107
IO87/M0
108
IO88
109
IO89
110
IO90
111
IO91/M1
112
IO92
113
IO93
114
IO94
115
VDD6
116
IO95/M2
117
IO96
118
IO97
119
IO98
120
IO99/M3
121
IO100
122
IO101
123
IO102
124
VSS13
125
IO103
126
IO104
127
IO105
128
IO106
129
VDD7
130
IO107
131
IO108
132
IO109
133
IO110
134
VSS14
135
IO111
136
IO112
137
IO113
138
IO114
139
IO115/CS1
140
IO116
141
IO117
142
IO118
143
VDD8
144
IO119/CS0
145
IO120
146
IO121
147
IO122
148
IO123/RD
149
IO124
150
IO125
151
IO126/WR
152
IO127
153
IO128
154
VSS15
155
RD/CF
156
VSS16 157
VSS17 158
IO130/RCLK 160
IO131 161
IO132 162
IO133/D7 163
IO134 164
IO135 165
IO136 166
IO137/D6 167
VDD9 168
IO138 169
IO139 170
IO140 171
IO141/D5 172
IO142 173
IO129 159
IO143 174
IO144 175
IO145/D4 176
VSS18 177
IO146 178
IO147 179
IO148 180
IO149/D3 181
VSS19 182
IO150 183
IO151 184
IO152 185
IO153/D2 186
VSS20 187
IO154/D1 188
IO155 189
IO156 190
IO157/D0 191
IO158 192
IO159 193
IO160 194
IO161/DOUT 195
VDD10 196
IO162 197
IO163 198
IO164 199
IO165/TDI 200
IO166 201
IO167/TMS 202
IO168 203
IO169 204
IO170 205
IO171/TCK 206
VSS21 207
RD_DT 208
IC61
ATT2C002
C49
10N SM
C91
10N SM
A15 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14
D23 D22 D11 D12 D13 D14 D15 D16 D17 D18 D19
D0
D1
D2
D3
D4
D5
D6
D7
D9
D10
RB0 RB6
VCCD
GND
CCLK
DOR
DOL
WCKO
BCKO
WR
MRESET must be tied LOW
DSP
SER_CLK
SER_DIN
SER_CH
MODE0
D[0..7]
SEL[0..2]
RDYO
INTR
A[0..15]
L[0..15]
R[0..15]
CLK17M_5V_FPGA
GO
M0 M2
DONE
MODE1
RB0
RB6
VCCD
BCKO
WCKO
DOL
DOR
CCLK
WR
DSP
SER_CLK
SER_DIN
SER_CH
DONE
M0 M2
RDYO
INTR
VFPGA
VFPGA
LDC LDC
L[0..15]
R[0..15]
SEL[0..2]
A[0..15]
D[0..7]
D21 D20
D8
SEL0
SEL1
SEL2
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
L0
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
R53 15K SM
R48
15K SM
R47
15K SM
A/D
NMODE
PMODE
A/D
NMODE
PMODE
MUTE
HDCD
C92
10N SM
C45
10N SM
R41
10R SM
TR_11
TR_10
TR_1
TR_5
TR_8
TR_14
TR_15
TR_16
TR_13
TR_12
TR_4
TR_3
TR_2
TR_9
TR_7
TR_6
+
C89
100U 25V ZA EL
L6
33UH 2A RA
A8 A9 A10 AA8 AA9 AA10 AA11 AA12 AA13 AA14 AA15
AA0 AA1 AA2 AA4 AA5 AA6 AA7 AA3
GO
GND AA[0..15]
AA[0..15]
01_1078 CW 1-5-01 Production release 1.0
01_1084 1.1CW 30-4-01 Listening component changes
CW 9-6-01 2.0

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Filename ECO No. DESCRIPTION OF CHANGE
J:\FILES\L-ELECT\PCB complete packages\l900s\l912 New 2000 DAC\L912_2.0\L912_2.0.DDB - L912C4_2.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
9 CD DAC ASIC
Circuit Diagram
L912CT
CW
28-Jun-2001
INITIALS Date Printed 3 8Sheet of
Notes:
L[0..15]
SEL[0..2]
R[0..15]
RDY
DCSET_L 127
DCSET_L 128
FBCKL 129
FBCKL 130
NC 131
FBCKLSNS 132
FBCKLSNS(2) 134
FBCKLSNS(2) 135
MID_L 136
OUT2L 138
NC 21 NC 17 NC 18 NC 14
SPRL2 1
NC 16 NC 15
5VREFL 3 0VREFL 4
VCCA1L 5
VCCA1L(2) 6
GND1L(2) 7
BIAS_L 144
OUTC_L 140
NC 12 NC 11
VCCA2 9
OUT2L 141
OUT1L 142
OUT1L 139
NC 19
IN1L 143
SEL1 27
VCCD 24
SEL0 26
NC 22
SEL2 28
L11
50
A5 31
R15
55
L13
52
L14
53
L1
40
VCCD
38 GNDD
37
L15
54
L10
49
L3
42
L4
43
L6
45 L5
44
L7
46
A1 35 A2 34
L9
48
A0 36 A4 32 A3 33 A7 29
R14
56
R8
62 R9
61
R11
59
R10
60
R6
64
R5
65
R4
66
FBCKLSNS 133
IN1L 137
R7
63
R12
58 R13
57
SPRL1 2
GNDA1L 8
GNDA2 10
NC 13 NC 20
GNDD 23
RDY 25
A6 30
L0
39
L2
41
L8
47
L12
51
R3
67
R2
68
R1
69
R0
70
VCCD
71
GNDD
72
A8
73
A9
74
A10
75
A11
76
A12
77
A13
78
A14
79
A15
80
A/D
81
NC
82
NMODE
83
PMODE
84
VCCD
85
GNDD
86
GNDA2
99
VCCA2
100
GNDA1R
101
GNDA1R(2)
102
VCCA1R(2)
103
VCCA1R
104
0VREFR
105
5VREFR
106
NC
87
NC
88
NC
89
NC
90
NC
91
NC
92
NC
93
NC
94
NC
95
NC
96
NC
97
NC
98
SPRR1
107
SPRR2
108
BIAS_R 109
IN1R 110
OUT1R 111
OUT2R 112
OUTC_R 113
OUT1R 114
OUT2R 115
IN1R 116
MID_R 117
FBCKRSNS(2) 118
FBCKRSNS(2) 119
FBCKRSNS 121
FBCKRSNS 120
NC 122
FBCKR 123
FBCKR 124
DCSET_R 125
DCSET_R 126
IC63
ASIC DAC
L[0..15]
R[0..15]
L0
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
SEL[0..2]
SEL0 SEL1 SEL2
FBCKR
FBCKR
FBCKRSNS
FBCKRSNS
MID_R AUDIO_R
VCCA1R(2)
VCCA1R
GNDA1R(2)
GNDA1R
DCSET_R
DCSET_R SERVQK
Right Audio Stage
L912C5_2.0.SCH
EMC
1
N F
SK2A
PHONO4G
N F
SK2B
PHONO4G
EMC Shield
SH1
EMCPHONO
CHASS
FBCKL
FBCKL
FBCKLSNS
FBCKLSNS
MID_L AUDIO_L
VCCA1L(2)
VCCA1L
GNDA1L(2)
GNDA1L
DCSET_L
DCSET_L SERVQK
Left Audio Stage
L912C6_2.0.SCH
R70
10R SM
R15
10R SM
VDDAC
VCCA
R76
0R0 SM
R77
15K SM
R49
15K SM
A/D
NMODE
PMODE
C66
1N0 SM
OUTL OUTR
GNDAN
FL
FLN
FR
FRN
VASICDIG
R132 100K SM
TR29
BC859B
MUTERLY
R120
10K SM
-13V
C164
1N0 SM
+
C3
100U CERAFINE
L1
33UH 2A RA
AA0 AA1 AA2 AA3 AA4 AA5 AA6 AA7
AA8 AA9 AA10 AA11 AA12 AA13 AA14 AA15
AA[0..15] AA[0..15]
RLY1A
RLY 51SB12T
RLY1B
RLY 51SB12T
C85
4N7 PP
C50
4N7 PP
RDY
MUTERLY
AUDIO_L
VCCA1L
VCCA1L(2)
GNDA1L(2)
GNDA1L
GNDA1R
GNDA1R(2)
VCCA1R(2)
VCCA1R
MID_R
FBCKRSNS
FBCKRSNS
FBCKR
FBCKR
DCSET_R
DCSET_R
DCSET_L
DCSET_L
FBCKL
FBCKL
FBCKLSNS
FBCKLSNS
MID_L
C54
10N 0805
C78
10N 0805
C138
10N 0805
C84
10N 0805
C139
100N 0805
C140
100N 0805
01_1078 CW 1-5-01 Production release 1.0
01_1084 1.1CW 30-4-01 Listening component changes
CW 9-6-01 2.0

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DATE
Filename ECO No. DESCRIPTION OF CHANGE
J:\FILES\L-ELECT\PCB complete packages\l900s\l912 New 2000 DAC\L912_2.0\L912_2.0.DDB - L912C5_2.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
9 CD DAC Right Audio Stage
Circuit Diagram
L912CT
CW
28-Jun-2001
INITIALS
Date Printed 4 8Sheet of
Notes:
Cold_R
Hot_R
-13V
+13V
AUDIO_R
FBCKR
FBCKR
FBCKRSNS
FBCKRSNS
MID_R
AUDIO_R
3
2
6
1
85
IC24A
AD797A SM
74
IC24B
AD797A SM
TR24
BC847B
TR21
BC847B
TR20
BC857B
R107 150R SM
R101
470R SM
L13
0R0 SM
VCCA1R(2)
VCCA1R
+8V9 +8V9
C118
100N SM
REF
R123
470R SM
74
IC25B
AD797A SM
GNDA1R
5
6
7
IC23B
OP275 SM
3
2
1
IC23A
OP275 SM
3
2
1
IC22A
TL072 SM
84
IC23C
OP275 SM
R124
10K 0805 0.1%
R125
10K 0805 0.1%
R129
10K 0805 0.1%
R128
22K1 0805 0.1%
R108
10K 0805 0.1%
DCSET_R
DCSET_R
R115
220K SM
R97
2M2 SM
SERVO_R
DC Bias
DC Servo
DAC 5V Reference
DCNR
SERVOR
COLDR
HOTR
REFR
MIDR
REFx2
-REF/2
REF/4
REF/4
REF
-5V
+8V9
3
2
6
1
8 5
IC25A
AD797A SM
TR23
BC857B
TR22
BC857B
TR26
BC847B
R119 150R SM
R92
470R SM
L12
0R0 SM
-5V
DAC 0V Reference
GNDAR
0V
D7 BAS16W SM
R118
470R SM
TR27
MMBFJ113
R102 10K SM
D10
BAS16W SM
SERVQK
FBKRSNS
FBKRSNSN
RFRSNS
GRSNS
GNDA1R(2)
R172
2M2 SM
FBCKR
Distortion Cancelation
C97
10U NP
C98
10U NP
6
710
IC6B
LM6182 SM
3
215
IC6A
LM6182 SM
134
1 8 9
16
IC6C
LM6182 SM
L5
4M7H RADIAL
L7
4M7H RADIAL
L10
1M5H RADIAL
L14
1M5H RADIAL
C52
3N3 PP
C55
3N3 PP
C61
330P PP
5
67
IC7B
OPA2134PA SM
84
IC7C
OPA2134PA SM
R19
1K0 SM R21
1K0 SM
R20
1K0 SM
R14
1K0 SM
R46
47R SM
USE GUARD RAIL AROUND INVERTING I/PS
3
21
IC7A
OPA2134PA SM
L18
7F004
L20
7F004
L17
7F004
L19
7F004
+13V
-13V
C22
100N SM
C23
100N SM
C31
100N SM
C32
100N SM
C20
100N PE
C115
100N PE
C114
100N PE
C117
100N PE
C34
100N PE
C33
100N PE
C95
100N PE
C100
100N PE
C126
100N PE
C111
100N PE
C72
1N0 PP
R54
2K2 SM
GNDA1R
GNDA1R(2)
VCCA1R(2)
VCCA1R
MID_R
FBCKRSNS
FBCKRSNS
FBCKR
FBCKR
DCSET_R
DCSET_R
DCR
GND4
GND7
IC1-V
-13V
-13V
R71
3K9 SM
R72
3K9 SM
NOT FITTED
NOT FITTED
C500
1N 0805
C501
1N 0805
C108
6N8 PP
C93
6N8 PP
R61
1K0 SM
R62
1K0 SM
R43
1K5 SM
01_1078 CW 1-5-01 Production release 1.0
01_1084 1.1CW 30-4-01 Listening component changes
C67
100P SM
C68
100P SM
C120
47P SM
C121
47P SM
SERVO_R
CW 9-6-01 2.0