Arcam FMJ CD-23 Service manual

Service Manual

ARCAM

CD23

Issue 1.0

FMJ CD23
Compact Disc Player (Text)

ARCAM

Contents List

!

Service guide

o Fault diagnostics
o Power supply test points
o Hints & tips

!

Main board L935

o Circuit description
o Component overlay
o Parts list
o Circuit diagrams

!

DAC board L912

o Circuit description
o Component overlay
o Parts list
o Circuit diagrams

!

Transformer specifications

o L859TX
o L860TX
o L883TX

!

General assembly

o Parts list

Service Guide

Contents

!

!

!

Fault diagnostics

Power supply test
points

Hints & tips

CD23 (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

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
PL202 +12 volts
PL204 -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

!

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

Main
Board
L935

Contents

!

Circuit description

!

Component overlay

!

Parts list

!

Circuit diagrams

CD23 (text) Circuit Description

Power Supplies Transformers

115/230 VAC:

! Main board - part number L859TX
! Toroid - part number L860TX

100 VAC:

! Main board - part number L862TX
! Toroid - part number L883TX

Main board transformer secondary windings:

1. 9V-0V-32V to produce the digital, motor drive and

2. 0-5V to provide an AC supply for the display

Toroid transformer secondary winding:

1. 13.7-0V-13.7 for audio output circuitry (DAC)

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. Th e cir cu it works
effectively as an “AND” gate.
If AC is present on the transformer secondary winding and the 5­second 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 DAC’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, mutin g t he output .
TR203 resets the ‘timer’ by discharging C221 quickly at turn-off.

Remote Control/PIC Micro

Remote control data is received from the IREy e 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 al so control s the con fig ura tio n
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.

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.

filament.

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).

System Clock

The system clock is generated on the DAC 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.

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
! DAC 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 outp ut 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.

CAM Products 2000(TM):

L935 Main Board Parts List Issue 4.0

Designator Part Description

BR200 3BDF01M Bridge rectifier DF01M 1A 100V
BR201 3BDF01M Bridge rectifier DF01M 1A 100V
C100 2A210 CERD 1N0 63V 20% RA
C101 2A210 CERD 1N0 63V 20% RA
C102 2A210 CERD 1N0 63V 20% RA
C103 2N710 ELST 100U 25V
C103 2P710ZA ELST 100U 25V ZA RUBYCON
C104 2A410 CERD 100N 63V 20% RA
C105 2A410 CERD 100N 63V 20% RA
C106 2A410 CERD 100N 63V 20% RA
C107 2A410 CERD 100N 63V 20% RA
C108 2A410 CERD 100N 63V 20% RA
C109 2A410 CERD 100N 63V 20% RA
C110 2N610 ELST 10U 50V
C111 2A210 CERD 1N0 63V 20% RA
C112 2A410 CERD 100N 63V 20% RA
C113 2A210 CERD 1N0 63V 20% RA
C114 2A210 CERD 1N0 63V 20% RA
C115 2A210 CERD 1N0 63V 20% RA
C116 2A210 CERD 1N0 63V 20% RA
C117 2A210 CERD 1N0 63V 20% RA
C129 2A310 CERD 10N 63V 20% RA
C151 2A210 CERD 1N0 63V 20% RA
C152 2A210 CERD 1N0 63V 20% RA
C153 2A210 CERD 1N0 63V 20% RA
C154 2A210 CERD 1N0 63V 20% RA
C155 2A210 CERD 1N0 63V 20% RA
C156 2A210 CERD 1N0 63V 20% RA
C200 2K233 SUPPR CAP 3N3 250V
C201 2K233 SUPPR CAP 3N3 250V
C202 2K233 SUPPR CAP 3N3 250V
C203 2D422 220NF CLASS X2 CAP 275VRMS
C206 2A410 CERD 100N 63V 20% RA
C207 2A410 CERD 100N 63V 20% RA
C208 2A410 CERD 100N 63V 20% RA
C209 2A410 CERD 100N 63V 20% RA
C210 2N833 ELST 3M3 25V
C211 2N810 ELST 1M0 25V
C212 2N810 ELST 1M0 25V
C215 2K410 PEST 100N 63V 10%
C218 2N710 ELST 100U 25V
C219 2N710 ELST 100U 25V
C220 2N710 ELST 100U 25V
C221 2N710 ELST 100U 25V
C222 2N710 ELST 100U 25V
C223 2N810 ELST 1M0 25V
C224 2N810 ELST 1M0 25V
C225 2N710B ELST 100U 100V
C226 2N710B ELST 100U 100V
C227 2N710B ELST 100U 100V
C228 2N810A ELST 1M0 10V
C229 2N810A ELST 1M0 10V
C230 2N710 ELST 100U 25V
C231 2N610 ELST 10U 50V
C300 2A410 CERD 100N 63V 20% RA

L935 Main Board Parts List Issue 4.0

Designator Part Description

C301 2A410 CERD 100N 63V 20% RA
C302 2A410 CERD 100N 63V 20% RA
C303 2A410 CERD 100N 63V 20% RA
C304 2A110 CERD 100P 50V -20% +80% RA
C305 2N710 ELST 100U 25V
C306 2N710 ELST 100U 25V
C307 2A310 CERD 10N 63V 20% RA
C308 2A410 CERD 100N 63V 20% RA
C400 2A410 CERD 100N 63V 20% RA
C410 2N710 ELST 100U 25V
C414 2A410 CERD 100N 63V 20% RA
C500 2A410 CERD 100N 63V 20% RA
C501 2A310 CERD 10N 63V 20% RA
C502 2K447 PEST 470N 63V 10%
C503 2A210 CERD 1N0 63V 20% RA
C504 2A310 CERD 10N 63V 20% RA
C505 2A410 CERD 100N 63V 20% RA
C506 2P622 ELST 22U 20V OSCON
C507 2A410 CERD 100N 63V 20% RA
C508 2D168 PPRO 680P 5% 63V RA
C509 2A410 CERD 100N 63V 20% RA
C510 2A110 CERD 100P 50V -20% +80% RA
C511 2A410 CERD 100N 63V 20% RA
C512 2A147 CERD 470P 50V -20% +80% RA
C513 2A110 CERD 100P 50V -20% +80% RA
C514 2A410 CERD 100N 63V 20% RA
CA1 L920CA CD...T MAINS JUMPER CABLE
D100 3A4148 SSDIODE 1N4148 75V
D101 3A4148 SSDIODE 1N4148 75V
D102 3A4148 SSDIODE 1N4148 75V
D103 3A4148 SSDIODE 1N4148 75V
D104 3A4148 SSDIODE 1N4148 75V
D105 3A4148 SSDIODE 1N4148 75V
D106 3A4148 SSDIODE 1N4148 75V
D200 3A4148 SSDIODE 1N4148 75V
D201 3A4148 SSDIODE 1N4148 75V
D205 3A4148 SSDIODE 1N4148 75V
D206 3A4148 SSDIODE 1N4148 75V
D208 3A4148 SSDIODE 1N4148 75V
D209 3A4148 SSDIODE 1N4148 75V
D210 3A4148 SSDIODE 1N4148 75V
D211 3A4148 SSDIODE 1N4148 75V
D212 3A4148 SSDIODE 1N4148 75V
D213 3B4003 RECTIFIER 1N4003F 1A 200V
D214 3C05104 Diode 5V1 400mW
D215 3A4148 SSDIODE 1N4148 75V
D300 3A4148 SSDIODE 1N4148 75V
D301 3C04704 ZENER 4V7 400MW
D400 3A4148 SSDIODE 1N4148 75V
D500 3C04704 ZENER 4V7 400MW
DISP100 B1015 DISP CD SONY 14-ST-20GK
E1 E930MC CD23TEXT VFD SUPPORT
EL200 8M101 EARTH LEAD
FS200 F022 INS COVER PCB FUSEHOLDER
FS200 8S004 FUSEHOLDER 20mm PCB

L935 Main Board Parts List Issue 4.0

Designator Part Description

FS201 C11166 FUSE 20mm 160mA T S504160mA
FS201 F022 INS COVER PCB FUSEHOLDER
FS201 8S004 FUSEHOLDER 20mm PCB
HS200 F006 HEATSINK CLIP TO220 13/8.6 DC/W
HS200 F008 HEATSINK TO220 8.6 DEGC/W
HS201 F007 HEATSINK TO220 CLIP 30
HS202 F007 HEATSINK TO220 CLIP 30
IC100 5G82832 IC CD CXP82832-031Q MICRO
IC200 5D1086A IC VREG LM1086CT-ADJ
IC202 5D317T IC VREG POS LM317T
IC203 5D317T IC VREG POS LM317T
IC204 5D337 IC VREG POS LM337T
IC300 5J7404 IC HCMOS 74HCU04
IC302 5H16C54X IC CMOS MICRO PIC16C54XT/P
IC302 8S018 IC SOCKET 18 PIN 0.3''
IC302 5H16C54X IC CMOS MICRO PIC16C54XT/P
IC303 5Q1641 IC MOTOR DRIVER LB1641
IC404 5J7404 IC HCMOS 74HCU04
IC500 5J7404 IC HCMOS 74HCU04
IC501 5M393A IC COMPARITOR DUAL LM393A
IC502 5TG550T SPDIF OPTICAL TRANSMITTER
IC302SW L825SW SOFTWARE
IC302SW L825SW SOFTWARE
L200 7D968A 6U8H INDUCTOR
L201 7D968A 6U8H INDUCTOR
L400 7F003 FERRITE BEAD SINGLE AXIAL TAPED 2K BOX
L500 7D327 27mH INDUCTOR
LED100 3D001 LED GREEN 5MM
LED101 3D003 LED ULTRARED 5MM
LK101A L814CA JUMPER 4-WAY LEAD
MC200 E922MC MAGNETIC SHIELD PLATE (ATTACH TO TX WITH E923MC)
MC201 E923MC ADHESIVE PAD (ATTACH TO E922MC & TX)
PCB L935PB_3 PRINTED CIRCUIT BOARD
PCB L935PB_2 PRINTED CIRCUIT BOARD
R100 1H122 RES MF W4 220R 1%
R101 1H310 RES MF W4 1% 10K
R102 1H310 RES MF W4 1% 10K
R103 1H268 RES MF W4 1% 6K8
R104 1H268 RES MF W4 1% 6K8
R105 1H268 RES MF W4 1% 6K8
R106 1H268 RES MF W4 1% 6K8
R107 1H268 RES MF W4 1% 6K8
R108 1H233 RES MF W4 1% 3K3
R109 1H222 RES MF W4 1% 2K2
R110 1H215 RES MF W4 1% 1K5
R111 1H210 RES MF W4 1% 1K0
R112 1H168 RES MF W4 1% 680R
R113 1H010 RES MF W4 1% 10R
R114 1H310 RES MF W4 1% 10K
R115 1H310 RES MF W4 1% 10K
R116 1H310 RES MF W4 1% 10K
R117 1H310 RES MF W4 1% 10K
R202 1K515 RES W25 5% VR25 1M5
R203 1H133 RES MF W4 1% 330R
R210 1G810 RES MF FU W3 1R0 5% NFR25

L935 Main Board Parts List Issue 4.0

Designator Part Description

R211 1G010 RES MF FU W3 10R 5% NFR25
R212 1G810 RES MF FU W3 1R0 5% NFR25
R213 1G010 RES MF FU W3 10R 5% NFR25
R214 1H216 RES MF W4 1% 1K6
R215 1H322 RES MF W4 1% 22K
R216 1H210 RES MF W4 1% 1K0
R217 1H333 RES MF W4 1% 33K
R218 1H127 RES MF W4 1% 270R
R219 1H127 RES MF W4 1% 270R
R220 1H182 RES MF W4 1% 820R
R221 1H182 RES MF W4 1% 820R
R222 1H447 RES MF W4 1% 470K
R223 1H310 RES MF W4 1% 10K
R224 1H310 RES MF W4 1% 10K
R225 1H222 RES MF W4 1% 2K2
R226 1H310 RES MF W4 1% 10K
R227 1H110 RES MF W4 1% 100R
R228 1H110 RES MF W4 1% 100R
R229 1H215 RES MF W4 1% 1K5
R230 1H310 RES MF W4 1% 10K
R300 1H056 RES MF W4 1% 56R
R303 1H268 RES MF W4 1% 6K8
R304 1H056 RES MF W4 1% 56R
R306 1H056 RES MF W4 1% 56R
R307 1H310 RES MF W4 1% 10K
R308 1H310 RES MF W4 1% 10K
R309 1H310 RES MF W4 1% 10K
R310 1H310 RES MF W4 1% 10K
R311 1H410 RES MF W4 1% 100K
R312 1H268 RES MF W4 1% 6K8
R313 1H410 RES MF W4 1% 100K
R314 1H310 RES MF W4 1% 10K
R315 1H310 RES MF W4 1% 10K
R409 1H310 RES MF W4 1% 10K
R432 1H310 RES MF W4 1% 10K
R439 1H510 RES MF W4 1% 1M0
R500 1H010 RES MF W4 1% 10R
R501 1H010 RES MF W4 1% 10R
R502 1H218 RES MF W4 1% 1K8
R503 1H218 RES MF W4 1% 1K8
R504 1H210 RES MF W4 1% 1K0
R505 1H112 RES MF W4 1% 120R
R506 1H212 RES MF W4 1% 1K2
R507 1H310 RES MF W4 1% 10K
R508 1H310 RES MF W4 1% 10K
R509 1H310 RES MF W4 1% 10K
R510 1H310 RES MF W4 1% 10K
R511 1H147 RES MF W4 1% 470R
R512 1H410 RES MF W4 1% 100K
R513 1H410 RES MF W4 1% 100K
R514 1H215 RES MF W4 1% 1K5
R515 1H310 RES MF W4 1% 10K
R516 1H212 RES MF W4 1% 1K2
R517 1H212 RES MF W4 1% 1K2
R518 1H212 RES MF W4 1% 1K2

L935 Main Board Parts List Issue 4.0

Designator Part Description

R519 1H110 RES MF W4 1% 100R
RX100 B2107 REMOTE RX PIC-26043TM2
SK100 8K8132 32-WAY FFC CONN HORIZ
SK200 8A001 IEC MAINS CONN PCB INS PX
SK200 HP007 COPPER RIVET TCP/D48 BS
SK201 8K2304 MOLEX MINI FIT 4 WAY
SK202 8K2306 MOLEX MINI FIT HCS 6 WAY
SK203 8K8023 23-WAY FFC CONN VERT
SK300 8K8023 23-WAY FFC CONN VERT
SK301 8K8032 32-WAY FFC CONN VERT
SK302 8K8032 32-WAY FFC CONN VERT
SK303 8K2005 5-WAY AMP CT CONN
SK500 8D228 MIN JACK SINGLE 3.5mm
SK501 8D220 PHONO SKT SINGLE EMC
SP103 F215 DS STICKY PAD 70 X 25mm
SP104 E822AP IR RX SUPPORT PAD
SW100 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW101 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW102 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW103 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW104 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW105 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW106 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW107 A1510 TACT SWITCH 2-PIN LOW PROF NO GND PIN
SW200 A1010 SWITCH PUSH MAINS DPST TV-8
TR200 4A549 TRANS LF SS N BC549B
TR201 4A549 TRANS LF SS N BC549B
TR202 4A549 TRANS LF SS N BC549B
TR203 4A549 TRANS LF SS N BC549B
TR204 4A557 TRANS LF SS P BC557B
TR300 4A549 TRANS LF SS N BC549B
TR301 4A549 TRANS LF SS N BC549B
TX200 L859TX FMJ COOL MULTI-VOLTAGE TX
TX200 L859TX FMJ COOL MULTI-VOLTAGE TX
X100 7W008 CER RESON 8.00MHz
X300 7W005 CER RESON 4.00MHz
Y200 F185 TX WIRE RESTRAINT
Y200 F185 TX WIRE RESTRAINT
Y201 HF4V09B SCREW
Y202 HF4V09B SCREW
Y203 HF4V09B SCREW
Y204 HF4V09B SCREW

POWER SUPPLIES MECH INTERCONNECTS DAC AND OSCILLATOR
L935C2_4
L935C2_4.0.sch

FILA
FILB

L935C3_4
L935C3_4.0.sch

FILA
FILB

17MHZ
RESET

BCLK

ADATA

LRCKRC5 IP

DIGOP

EMPHASIS

L935C4_4
L935C4_4.0.sch

DEEM
LRCK
ADATA
BCLK

RESET
17MHZ

FIX152
FIXING HOLE 3.5

(EARTH BY IEC SOCKET)

DISPLAY PCB
L935C1_4
L935C1_4.0.sch

FIX157
FIXING HOLE 3.2

C150
1N0 CD

0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG

EMC2

PCB

PCB

L935PB_4

FIX151
FIXING HOLE 3.2

EMC1

IC302SW

S/W

L825SW

C151
1N0 CD

FIX153
FIXING HOLE 3.5

RC5 INPUT AND DIG OUTPUTS
L935C5_4
L935C5_4.0.sch

DIGOP RC5RP

FIX154
FIXING HOLE 3.5

C152
1N0 CD

C153
1N0 CD

FIX155
FIXING HOLE 3.5

C154
1N0 CD

FIX156
FIXING HOLE 3.5

C155
1N0 CD

FIX150
FIXING HOLE 3.5

C156
1N0 CD

0V_DIG

0V_MOT

0V_30V_DIG

0V_2

SP100

STARPOINT

0V_1

USE EXCLUDE NF WHEN GENERATING ROS.

DRAWING TITLE

23425

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

CD23T - TOP LEVEL SCHEMATIC

Filename:
Notes:

Contact Engineer:

L935C6_4.0.prj

Contact Tel: [phone]Travis Pierce

ECO No. DESCRIPTION OF CHANGE

INITIALS

Printed: 6 6Sheet of

DATE

23-Jan-2002

DRAWING NO.

4.0PCB REMOTE SNAP OFF CHANGEWAF 22/1/0202_E011

3.0ADMINISTRATIVE ISSUE CHANGE, PCB TO ISS3 FOR AIWA REQCL 04/10/0101_1171

ISSUE

L935CT

SK200
IEC3

N E L

N

E

C200

C201

3N3(X1Y2)

R202

NEUTRAL LIVE

L200

6U8H

1M5 VR25

C203

220N(X2)

NEUTRAL2

SK202

3
2
1

6
5
4

MOLEXPWR6
(FOR AUX TOROID)

CA1

L920CA

L

3N3(X1Y2)

L920CA

BRN BRN

L201
6U8H

BLU
BLU

LIVE2

EL200

EARTH LEAD

8M101

EARTH LEAD

(IEC INLET TO CHASSIS)

SW200A
MAINS_SW A1010

SW200B

MAINS_SW A1010

EMC2

C202
3N3(X1Y2)

EMC2

FS200

T250MA115V
115V ONLY

FS201

T160MA
230V ONLY

NEUTRAL2

115V

115V

230V

230V

1

2
7

6

4

5

10

9

TX200

L859TX

NB: A CABLE GOES BETWEEN BRN BRN AND BLU BLU
FROM MAINS SWITCH TO BACK OF PCB

Y200

TX WIRE CLIP

FILA

FILB

SK201
MOLEXPWR4

(FOR AUX TOROID)

1

2

3

4

TX_16

BR201
DF01M

+

C211
1M0 25V

+

C223
1M0 25V

+12V(A)

D200

1N4148

IC200

+11V(U)

BR200
DF01M +

D213

1N4003

C210
3M3 EL

+

C225
100U EL 100V

AC_3

TX_19

R210

TX_20

AC1

C206
100N CD

R211
10R FU

1R0 FU
R212

AC2

C207

100N CD

C208

100N CD

11

13

15
19

20

1R0 FU

R227
100R MF

R228

LM1086-ADJ

I

Vin

I

Vin

IC204

ADJ

A

+

C218
100U EL

+

C226
100U EL 100V

A

ADJ

LM337T

D205

1N4148

Vout

Vout

O

O

TX_18

HS201

TO220HS30REG

R203
330R MF

R214
1K6 MF

R215
22K MF

R216
1K0 MF

D201
1N4148

-30VF

+

+7V

+

C227
100U EL 100V

Filiament supply

Motor drive supply

C228
1M0 10V

R217
33K MF

0V_2

D214
5V1 400MW

+

C212
1M0 25V

+

C224
1M0 25V

100R MF

0V_1

-12V(A)

+11V(U)

IC202

I

Vin

C209
100N CD

HS

D206

1N4148

LM317T

A

ADJ

+

C219
100U EL

Vout

HS200
TO220HS08REG

O

R218
270R MF

R220
820R MF

D208
1N4148

+5V(D)

0V_2

Digital +5V

+

C220
100U EL

D211

TX FIXING SCREWS

Y201
SCREW HF4V09B

Y203
SCREW HF4V09B

Y202
SCREW HF4V09B

Y204
SCREW HF4V09B

AFFIX TO TX BETWEEN ANALOGUE CIRCUITRY & TX
MC200

E922MC

E922MC

MC201

E923MC

E923MC

AC1

AC2

D209

1N4148
D210

1N4148

R213
10R FU

C230

100U EL

0V_3

1N4148

IC203

I

Relay control for AC detect

R222
470K MF

C221

100U EL

R226
10K MF

R229

TR200
BC549B

+

1K5 MF

TR201
BC549B

TR204
BC557B

R230
10K MF

D215
1N4148

0V_3

R224
10K MF

+

C231

10U EL

R223
10K MF

R225

+

2K2 MF

TR202
BC549B TR203

BC549B

+12V(A)

-12V(A)

+5V(A)

+5V(D)

RLYPWR

+11V(U)

SK203

23
22
21
20
19
18
17
16
15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

FFC23V

Power connector for 9DAC PCB

Vin

C215
100N PE

LM317T

A

ADJ

+

C222
100U EL

Vout

O

HS202
TO220HS30REG

R219
270R MF

R221
820R MF

D212
1N4148

+5V(A)

0V_1

DAC supply

+

C229
1M0 10V

0V_DIG

0V_3

DRAWING TITLE

CD23T - POWER SUPPLIES

23425

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

Filename:
Notes:

Contact Engineer:

L935C2_4.0.sch

4.0PCB REMOTE SNAP OFF CHANGEWAF 22/1/0202_E011

3.0ADMINISTRATIVE ISSUE CHANGE, PCB TO ISS3 FOR AIWA REQCL 04/10/0101_1171

ECO No. DESCRIPTION OF CHANGE

Contact Tel: [phone]Travis Pierce

INITIALS

Printed: 2 6Sheet of

DATE

23-Jan-2002

DRAWING NO.

L935CT

ISSUE

+5V(D)

Data connector to DAC PCB
SK301
FFC32V

24

25

26

27

28

29

30

31

32

Flexfoil connector to Display PCB
SK302
FFC32V

+5V(D)

10

11

12

13

14

15

16

17

18

19

20

21

22

23

123456789

30

31

32

25

26

27

28

29

20

21

22

23

24

15

16

17

18

19

10

11

12

13

14

123456789

DIGOP

14

7

SK300
FFC23V

IC300G
74HCU04

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

R314

10K MF

CLK
XRST
DATA
LDON
SENS
XLT
SUBQ

SQCK
AMUTE
BCLK
SCOR
ADATA
LRCK

LPH

0V_DIG

R307
10K MF

C300
100N CD

0V_DIG

Flex connector from CDM14BL-5BD25 mech

+5V(D)

0V_DIG

+7V

0V_DIG

IREYE

RC5 IP

C301
100N CD

R310
10K MF

IC300A

BCLK

1 2

74HCU04

ADATA

LRCK

17MHz Master Clock

R308
10K MF

TR300
BC549B

5 6

IC300E

74HCU04

+5V(D)

IC300C

74HCU04

R309
10K MF

TR301
BC549B

IC300B

3 4

74HCU04

IC300D

74HCU04

IC300F

1011

74HCU04

(From 9 DAC PCB)

89

1213

D300
1N4148

C304
100P CD

+5V(D)

0V_DIG

R300
56R MF

R304
56R MF

R306
56R MF

RA0
AMUTE
DEEM
RMIN

XRST

0V_DIG

0V_DIG

0V_DIG

RESET

R311

100K MF

C309
10P CD

NF

C310
10P CD
NF

C311
10P CD
NF

+5V(D)

R313

100K MF

IC302
PIC16C54XT

17

RA0

18

RA1

1

RA2

2

RA3

3

RTCC

4

MCLR

16

OSC1

X300
CST4.00

0V_DIG

AMUTE

OSC2

15

XRST

VSS

5

RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7

DEEM

VDD

14

RA0

6
7
8
9
10
11
12
13

C302
100N CD

RB6

+5V(D)

RB5

RB0

RB4
RB5
RB6

+

C305
100U EL

RB4

RB0

HDCD

0V_DIG

Motor Drive
IC303
LB1641

O/P 'Out'

LoadOut

O/P 'In'

Vcc
Vcc

LoadIn

Bias

GND

FILA

10
9
8
7
6
5
4
3
2
1

SCOR

0V_DIG

LDOUT
LDIN

D301

4V7 400MW

RMIN

LDOUT

C303
100N CD

LDIN

SENS

+7V

0V_MOT

XLT

+

AMUTE

C306
100U EL

CLK

LDON

C307
10N CD

C308
100N CD

DATA

SQCK

SUBQ

LOADSW

-30VF

0V_MOT

XRST

HDCD

DEEM

+5V(D)

LPH

R303
6K8 MF

LOADSW

R312
6K8 MF

IREYE

FILB

0V_DIG

R315
10K MF

SK303
8K2005

1
2
3
4
5

EMPHASIS

LOADOUT
LOADIN
GND
INSW
OUTSW

0V_DIG

DRAWING TITLE

23425

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

CD23T - MECH, MOTOR & MICRO

Filename:
Notes:

Contact Engineer:

L935C3_4.0.sch

Contact Tel: [phone]Travis Pierce

ECO No. DESCRIPTION OF CHANGE

INITIALS

Printed: 3 6Sheet of

DATE

23-Jan-2002

DRAWING NO.

4.0PCB REMOTE SNAP OFF CHANGEWAF 22/1/0202_E011

3.0ADMINISTRATIVE ISSUE CHANGE, PCB TO ISS3 FOR AIWA REQCL 04/10/0101_1171

ISSUE

L935CT

C400
100N CD

L400
7F003

14

IC404G
74HCU04

7

C414
100N CD

D400
1N4148

+5V(D)

+

C410
100U EL

R409
10K MF

R432
10K MF

R439
1M0 MF

IC404E
74HCU04

1011

IC404F
74HCU04

1213

1 2

IC404A
74HCU04

3 4

IC404B
74HCU04

5 6

IC404C
74HCU04

IC404D
74HCU04

0V_DIG

0V_DIG

89

RESET

DRAWING TITLE

CD23T - RESET CIRCUIT

23425

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

Filename:
Notes:

Contact Engineer:

L935C4_4.0.sch

4.0PCB REMOTE SNAP OFF CHANGEWAF 22/1/0202_E011

3.0ADMINISTRATIVE ISSUE CHANGE, PCB TO ISS3 FOR AIWA REQCL 04/10/0101_1171

ECO No. DESCRIPTION OF CHANGE

Contact Tel: [phone]Travis Pierce

INITIALS

Printed: 4 6Sheet of

DATE

23-Jan-2002

DRAWING NO.

L935CT

ISSUE

CARRIER FILTER AND DEMODULATOR

+5V(D)

SK500

JACK3.5

C509

100N CD

EMC1

R511
470R MF

C513
100P CD

R504
1K0 MF

0V_DIG

+5V(D)

R500
10R MF

0V_DIG

R512
100K MF

D500
4V7 400MW

RC5RP

C502
470N PE

DIGOP

IC500G

7

74HCU04

R507
10K MF

14

1 2

IC500A
74HCU04

L500
27mH

7

IC501B
LM393A

C508
680P PP

5
6

C510
100P CD

IC500F
74HCU04

IC500E
74HCU04

IC500D
74HCU04

5 6

IC500C
74HCU04

3 4

IC500B
74HCU04

R508
10K MF

1213

1011

89

R502
1K8 MF

R514
1K5 MF

R503
1K8 MF

R505
120R MF

R506
1K2 MF

R516
1K2 MF

R517
1K2 MF

R518
1K2 MF

2
3

IC501A
LM393A

C507
100N CD

R510
10K MF

R519
100R MF

1

R509
10K MF

R513
100K MF

+5V(D)

R501
10R MF

GP1FA550TZ
IC502

C512
470P CD

C503
1N0 CD

1

84

OPTICAL OUTPUT

2

VCC

I/P

GND

3

100N CD

R515
10K MF

C505

C511

IC501C
LM393A

C501
10N CD

SK501
PHONO1

EMC

C500
100N CD

0V_DIG

+ C506

22U EL OS

COAXIAL OUTPUT

C504
10N CD

C514
100N CD

0V_DIG

DRAWING TITLE

23425

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

100N CD

CD23T - RC5 INPUT & DIGITAL OUT

Filename:
Notes:

Contact Engineer:

L935C5_4.0.sch

Contact Tel: [phone]Travis Pierce

ECO No. DESCRIPTION OF CHANGE

INITIALS

Printed: 5 6Sheet of

DATE

23-Jan-2002

DRAWING NO.

4.0PCB REMOTE SNAP OFF CHANGEWAF 22/1/0202_E011

3.0ADMINISTRATIVE ISSUE CHANGE, PCB TO ISS3 FOR AIWA REQCL 04/10/0101_1171

ISSUE

L935CT

FIX107
FIXING HOLE 3.5

C116
1N0 CD

0VREM

(NEAR SK100)

FIX108
FIXING HOLE 3.2

C117
1N0 CD

0VREM

+5V

+

C103
100U EL

LK101A

1
2
3
4

L814CA

C112
100N CD

+5VREM

IREYEREM

RX100
PIC-26043TM2

3

O/P

+5V

GND

2

C105
100N CD

1

HDCD LED

LED101

LED ULTRARED

DECOUPLING CAPACITORS FOR IC100

C104
100N CD

C106
100N CD

C108
100N CD

R100
220R MF

+5VREM

+

C110
10U EL

0VREM

LED100
LED GREEN

POWER LED

SP104

IR RX

SUPPORT PAD

IR RX SUPPORT PAD

CMO4

D100

1N4148

D101

1N4148

REMOTE CUSTOM CODE DIODE MATRIX

D102

1N4148

D103

1N4148

D104

1N4148

D106

1N4148

CMO3

CMO2

CMO1

D105

1N4148

DISP100
DISPLAY 14-ST-20GK

F11F1214G413G512G611G710G89G98G107G116G125G134G143G152G161G17NC18P119P220P321P422P523P624P725P826P927P1028P1129P1230P1331P1432P1533P1634P1735P1836P1937P2038P2139F241F2

42

F2F1

0V

SP103

70mm x 25mm
DOUBLE SIDED
STICKY GASKET

70X25_DS STICKY TAPE

E1

CD23TXT VFD SUPPORT

E930MC

1

2

3

4

0V

C107
100N CD

-30V

Connector to main PCB

FIX105
FIXING HOLE 3.5

FIX102
FIXING HOLE 3.5

0V

CHASSIS3

C100
1N0 CD

0V 0V 0V

SK100
FFC32H

32

F1

31
30

SCOR_DISP

29
28
27
26

RMIN_DISP

25

LDOUT_DISP

24

LDIN_DISP

23

SENS_DISP

22
21

XLT_DISP

20

AMUTE_DISP

19
18
17
16
15
14

CLK_DISP

13

LDON_DISP

12

DATA_DISP

11

SQCK_DISP

10

SUBQ_DISP

9

LOADSW_DISP

8

XRST_DISP

7
6
5

DEEM_DISP

4

HDCD_DISP

3

LPH_DISP

2

F2

1

IREYE_DISP

PIN 1 TO LEFT
CABLE POINTING DOWN

FIX106
FIXING HOLE 3.5

C114
1N0 CD

FIX103
FIXING HOLE 3.5

0V

C102
1N0 CD

C115
1N0 CD

FIX100
FIXING HOLE 3.2

0V

C113
1N0 CD

LK101B

L814CA

0V

0V

+5V

1
2

IREYE_DISP

3
4

0V

+5V

-30V

TACTSW A1510

SW100

R113
10R MF

FIX101
FIXING HOLE 3.5

C101

1N0 CD

C109
100N CD

0V

R101
10K MF

SW101

NEXT PREV FF FR PAUSE STOP PLAY OPEN

TACTSW A1510

FIX104
FIXING HOLE 3.5

R103
6K8 MF

SW102

TACTSW A1510

R108
3K3 MF

SW103

TACTSW A1510

R109
2K2 MF

SW104

TACTSW A1510

R110
1K5 MF

SW105

TACTSW A1510

R111
1K0 MF

SW106

TACTSW A1510

DRAWING TITLE

R112
680R MF

SW107

TACTSW A1510

CD23T - DISPLAY AND MICRO

C111
1N0 CD

0V

23425

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

R114

10K MF

R115

10K MF

R116

10K MF

R117

10K MF

0V

+5V

R104
6K8 MF

C129

10N CD

Filename:
Notes:

Contact Engineer:

L935C1_4.0.sch

0V

R105
6K8 MF

R106
6K8 MF

R107
6K8 MF

R102
10K MF

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

1
2
3
4
5
6
7
8
9

Contact Tel: [phone]Travis Pierce

13G
14G
NC
CMI1
SCOR
CMI2
CMI3
RMIN
CMI4
NC
NC
LDOUT
LDIN
SENS
XLT
AMUTE
PGML
NC
NC
TIMER
NC
CLK
LDON
DATA
SQCK
SUBQ
NC
AVREF
KEY0
KEY1

98

99

100

10G

11G

12G

KEY231KEY332ADJ/AFADJ

LOADSW

33

34NC35NC36

+5V

871G88

892G903G914G925G936G947G958G969G97

VDD

AVSS37RST38EXTAL39XTAL40VSS41NC42NC43VDD44VDP45NC

-30V

+5V

0V

X100
CST8.00

0V

ECO No. DESCRIPTION OF CHANGE

INITIALS

23-Jan-2002

Printed: 1 6Sheet of

S385S286S1

46

DATE

81

S484S583S682S7

EMPHASIS

NC47LPH48NC49NC

50

S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21

NC
NC
NC
NC
NC
NC
NC
NC

CMO4
CMO3
CMO2
CMO1

NC
NC
NC

S8
S9

80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51

IC100
CXP82832

CMO4
CMO3
CMO2
CMO1

DRAWING NO.

4.0PCB REMOTE SNAP OFF CHANGEWAF 22/1/0202_E011

3.0ADMINISTRATIVE ISSUE CHANGE, PCB TO ISS3 FOR AIWA REQCL 04/10/0101_1171

ISSUE

L935CT

DAC
Board
L912

Contents

!

Circuit description

!

Component overlay

!

Parts list

!

Circuit diagrams

DAC Circuit description

Refer to L912 circuit diagrams

The DAC PCB converts Sony format digital audio data at

44.1KHz samp ling rate to unba lanced audi o outputs. There i s a
Pacific Microsonics PMD-200 HDCD filter which is
programmed by a dedicated on board PIC micro (IC406) to
accept a variety of data formats.

Digital Filter/HDCD decoder

The FPGA receives two control lin es from the main board PIC,
RB0 and RB6.

RB5 MS1, Serial data mode se l ect 1. Used just after sw itch- on.
RB4 MS2, Serial data mode se l ect 2. Used just after sw itch- on.

The PMD 200 (IC 400) receives Sony format serial digital audio
data (after re latching) mute and de-emphasis control signals
from the main board. The output from this is 8x over-sampled
filtered audio da ta with a 24 bit word len gth. The HDCD filter
output is in serial form BCKO, WCKO, DOL and DOR.

Data Re-latching

The PMD 200 (IC 400 ) requi res t ha t the in put da ta is ti med with
respect to th e system cloc k, h owever th e data edges a re no t well
defined when clocking at the system clock frequency so a re­latching circuit, IC300, IC 401, IC402 and IC403, re-clocks
SER_CLK, SER_DIN and SER_CH to double the bit clock
frequency. The phase of the latching clock is nudged if it’s
rising edge gets t oo close to the bit c lock transitions.

Reset Signal

The XRST reset signal from the mother boa rd is buffered by IC
300D & E to produc e the GO signal. C127 at the in put of the
buffer delays GO from falling when the unit i s switched off so
that the mute relay has chance to close before any clicks occur.
The GO signal en ables t he c lock outpu t, in itia tes PMD 200 and
FPGA programming and enables power and bias to the DAC
ASIC.

Power Supplies

TR7 and TR5 regulate the supply to +/-13V with about 0.2V
drop-out margin.

Voltage Reference

A voltage reference, IC 62, is used to derive the +/-13V rails as
mentioned above and also a clean 5V supply to the DAC from
IC 5. The reference is filtered and can be divided by two if TR
19 is switched on to provide the 6dB gain shift required by the
HDCD filter(IC 400). This reference is used to drive the DAC
reference point and the bias sources for the D AC .

Mute Relay

The mute relay is controlled from the PIC micro on the
motherboard via RA0 after switch-on. In Standby mode, XRST
is low which interrupts the relay via TR 25. RA0 is low when
the CD player comes out of standb y mode and goes hi gh after a
short settling delay. TR 18 is also used to interrupt the relay
while the FPGA is not fully programmed.
The power rail, RLYPWR, is un-regulated and has a small
reservoir capacitor (on the mother board) so that the relay is
released very soon after the mains is disconnected from the CD
player before the other power supply rails collapse.

FPGA noise shaper

The FPGA (IC61) is programmed by the PROM (IC31), which
holds the configuration code, to perform the function of reading
in the 8x over-sampled audio data from the HDCD filter and
output the noise-shaped and encoded data to drive the ring
DACs. This hap pens after the PRG MN line and the GO sign al
goes high.

Ring DAC

The ring DAC (IC 63) re-latches t he data from the FPGA to a
clean latching signal gated by U21 to the system clock. The data
is then driven through buffers into resistor rings, which
effectively form the 48 current sources, into a virtual earth point.
Bias curren ts are also injected to c ompensate for the way the
ring data is encoded. The earth point is held at half the voltage
reference voltage 2.5V or 1.25V depending on the HDCD gain
shift state. This level is generated by a matched resistor divider
on the chip.

Voltage References

The current switches in the DAC need two reference voltage
levels per channel to switch each of the resistors between, 0V
and +2.5/5V. The second reference can be switched between
+2.5 and +5V depending on the gain required by the HDCD
filter. The reference points must be kept at a very quiet DC level
since any noise on these points is directly represented at the
audio output s. To keep thes e point s quiet, op-amp servos, IC 8,
IC 9, IC 24 and IC 25 drive them through discreet buffers. A
second connection is made to the point on the chip which the
op-amp uses as a sense line.

DC Bias

Because of the way th e ring DAC works, n ot all the 48 cu rrent
sources are swi tched on at any one ti me in each ring. On ea ch
channel, one ring has an average of 14 sources on and the other,
the compliment, has an average of 34. DC bias needs to be
injected in to the vi rtual ea rth s to null th e curren t offset s. This is
done by applying a DC voltage through on-chip matched
resistors. The applied voltages must be either side of the virtual
earth voltage whi ch is half th e referen ce voltage. The DC levels
must also be proportional to the reference voltage. The bias
voltages are sourced by IC 4 and IC 23.

Voltage Servo

A voltage servo, IC 22, ensures the audi o output DC offset is
nulled by varyin g on e of t h e DC bi a s leve ls s ligh t l y via R 16 and
R115.
To ensure the s ervo has stabilized by the time the mute rela ys
are opened, the t ime con stant of the s ervo is drast ically r educ ed
while the mute relay is act ive by JFETs TR 27 and TR 28.

Analogue Stages

The DAC has two pa irs of comp limentar y outputs. Each output
is in the form of a virtual earth point which are then passed
through a current feedback I/V stage (IC2 and IC6). The gain
setting feedb ack resistor for th e I/V stage is on the DAC chip
matched to the resistors in the DAC ring.
The complementary signals are then passed through a
differential 4 pole passive LP filter with a bessel characteristic
which removes a large amount of digital (ultrasonic) noise while
causing minimum disruption to the audio band. They are then
combined with a low dist ortion differential buffer amplifi er to
produce a single ended output (IC 3 and IC 7).

Specifications

Type of DAC

DAC source

0dB Output Level :

Frequency
response

THD

Signal to Noise

Crosstalk L/R

Output offset

Output
Impedance

DCS-designed ring DAC ASIC with a 4 rings of 48 current so urces.

:

Encoded current source drive from FPGA. 14 of 48 current sources active on average on

:

two rings & 34 of 48 on the other two.

2.3V rms (4.6V for HDCD mode) +/- 0.2V rms @ 1KHz.

10Hz to 20KHz +0,-0.2dB.

:

0.01% typical, 0.018% max @ 1KHz 0dB output.

:

0.05% typical, 0.06% max @ 1KHz 0dB ouput in HDCD mode

Better than 93dB CCIR uwtd ref 1KHz 0dB,

:

Better than 97dB A weighted ref 1KHz 0dB. (Hoping to improve, please consult SJB
before publishing).

Better than -98dB at 1KHz 0dB

:

<20mV d.c.

:

47 Ohms o/p to drive load 600 Ohms minimum.

:

L912 DAC Board Parts List Issue 2.0

Designator Part Description

C1 2D247N PPRO 4N7 63V 5% RA
C2 2N710 ELST 100U 25V
C3 2P710AC ELEC 100U 25V CERAFINE
C4 2N710 ELST 100U 25V
C5 2K410 PEST 100N 63V 10%
C6 2P710AS ELEC 100U 25V SILMIC
C7 2P710AS ELEC 100U 25V SILMIC
C9 2D133 PPRO 330P 5% 63V RA
C10 2D133 PPRO 330P 5% 63V RA
C11 2D147N PPRO 470P 63V 5% RA
C12 2N710 ELST 100U 25V
C13 2C047 MLC 47P 100V NPO 5% SM
C14 2C047 MLC 47P 100V NPO 5% SM
C15 2C410 MLC 100N 50V X7R 10% SM
C16 2D210 PPRO 1N0 5% 63V RA
C17 2C410 MLC 100N 50V X7R 10% SM
C18 2D210 PPRO 1N0 5% 63V RA
C19 2K410 PEST 100N 63V 10%
C20 2K410 PEST 100N 63V 10%
C21 2N710 ELST 100U 25V
C22 2C410 MLC 100N 50V X7R 10% SM
C23 2C410 MLC 100N 50V X7R 10% SM
C24 2K410 PEST 100N 63V 10%
C25 2D147N PPRO 470P 63V 5% RA
C26 2D147N PPRO 470P 63V 5% RA
C27 2U610 ELST NON POLAR 10UF 35V
C28 2P622AS ELEC 22U 25V SILMIC
C29 2K410 PEST 100N 63V 10%
C30 2U610 ELST NON POLAR 10UF 35V
C31 2C410 MLC 100N 50V X7R 10% SM
C32 2C410 MLC 100N 50V X7R 10% SM
C33 2K410 PEST 100N 63V 10%
C34 2K410 PEST 100N 63V 10%
C35 2K410 PEST 100N 63V 10%
C36 2N747 ELST 470U 25V RA
C37 2N747 ELST 470U 25V RA
C38 2U610 ELST NON POLAR 10UF 35V
C39 2C410 MLC 100N 50V X7R 10% SM
C40 2C410 MLC 100N 50V X7R 10% SM
C41 2C410 MLC 100N 50V X7R 10% SM
C42 2K410 PEST 100N 63V 10%
C43 2C410 MLC 100N 50V X7R 10% SM
C44 2K410 PEST 100N 63V 10%
C45 2C310 MLC 10N 50V X7R 10% SM
C46 2D268 PPRO 6N8 5% 63V RA
C47 2K410 PEST 100N 63V 10%
C48 2K410 PEST 100N 63V 10%
C49 2C310 MLC 10N 50V X7R 10% SM
C50 2D247N PPRO 4N7 63V 5% RA
C51 2D268 PPRO 6N8 5% 63V RA
C52 2D233 PPRO 3N3 5% 63V RA
C53 2D247N PPRO 4N7 63V 5% RA
C54 2J310 MLC 10N 50V X7R 10% 0805
C55 2D233 PPRO 3N3 5% 63V RA
C56 2N710 ELST 100U 25V
C57 2D233 PPRO 3N3 5% 63V RA
C58 2K410 PEST 100N 63V 10%
C59 2D233 PPRO 3N3 5% 63V RA
C60 2K410 PEST 100N 63V 10%
C61 2D133 PPRO 330P 5% 63V RA
C62 2D133 PPRO 330P 5% 63V RA
C65 2D268 PPRO 6N8 5% 63V RA

L912 DAC Board Parts List Issue 2.0

Designator Part Description

C66 2C210 MLC 1N0 50V X7R 10% SM
C67 2C110 MLC 100P 50V NPO 5% SM
C68 2C110 MLC 100P 50V NPO 5% SM
C69 2C110 MLC 100P 50V NPO 5% SM
C70 2C110 MLC 100P 50V NPO 5% SM
C71 2C082 MLC 82P 50V NPO 5% SM
C74 2J310 MLC 10N 50V X7R 10% 0805
C75 2C310 MLC 10N 50V X7R 10% SM
C76 2J310 MLC 10N 50V X7R 10% 0805
C77 2J310 MLC 10N 50V X7R 10% 0805
C78 2J310 MLC 10N 50V X7R 10% 0805
C79 2J310 MLC 10N 50V X7R 10% 0805
C80 2J310 MLC 10N 50V X7R 10% 0805
C81 2J310 MLC 10N 50V X7R 10% 0805
C82 2J310 MLC 10N 50V X7R 10% 0805
C83 2J310 MLC 10N 50V X7R 10% 0805
C84 2J310 MLC 10N 50V X7R 10% 0805
C85 2D247N PPRO 4N7 63V 5% RA
C86 2J310 MLC 10N 50V X7R 10% 0805
C87 2J310 MLC 10N 50V X7R 10% 0805
C88 2C410 MLC 100N 50V X7R 10% SM
C89 2P710ZA ELST 100U 25V ZA RUBYCON
C90 2J310 MLC 10N 50V X7R 10% 0805
C91 2C310 MLC 10N 50V X7R 10% SM
C92 2C310 MLC 10N 50V X7R 10% SM
C93 2D268 PPRO 6N8 5% 63V RA
C94 2J310 MLC 10N 50V X7R 10% 0805
C95 2K410 PEST 100N 63V 10%
C97 2U610 ELST NON POLAR 10UF 35V
C98 2U610 ELST NON POLAR 10UF 35V
C99 2J310 MLC 10N 50V X7R 10% 0805
C100 2K410 PEST 100N 63V 10%
C101 2J310 MLC 10N 50V X7R 10% 0805
C102 2J310 MLC 10N 50V X7R 10% 0805
C103 2J310 MLC 10N 50V X7R 10% 0805
C104 2C410 MLC 100N 50V X7R 10% SM
C105 2J310 MLC 10N 50V X7R 10% 0805
C106 2J310 MLC 10N 50V X7R 10% 0805
C107 2N710 ELST 100U 25V
C108 2D268 PPRO 6N8 5% 63V RA
C109 2C410 MLC 100N 50V X7R 10% SM
C110 2C310 MLC 10N 50V X7R 10% SM
C111 2K410 PEST 100N 63V 10%
C112 2J310 MLC 10N 50V X7R 10% 0805
C113 2J310 MLC 10N 50V X7R 10% 0805
C114 2K410 PEST 100N 63V 10%
C115 2K410 PEST 100N 63V 10%
C116 2K410 PEST 100N 63V 10%
C117 2K410 PEST 100N 63V 10%
C118 2C410 MLC 100N 50V X7R 10% SM
C119 2C410 MLC 100N 50V X7R 10% SM
C120 2C047 MLC 47P 100V NPO 5% SM
C121 2C047 MLC 47P 100V NPO 5% SM
C122 2D210 PPRO 1N0 5% 63V RA
C123 2D210 PPRO 1N0 5% 63V RA
C124 2N610 ELST 10U 50V
C125 2N610 ELST 10U 50V
C126 2K410 PEST 100N 63V 10%
C127 2J410 MLC 100N 50V X7R 10% 0805
C128 2J410 MLC 100N 50V X7R 10% 0805
C129 2J410 MLC 100N 50V X7R 10% 0805
C130 2J410 MLC 100N 50V X7R 10% 0805

L912 DAC Board Parts List Issue 2.0

Designator Part Description

C131 2J410 MLC 100N 50V X7R 10% 0805
C132 2J210 MLC 1N 50V X7R 10% 0805
C133 2J210 MLC 1N 50V X7R 10% 0805
C134 2J210 MLC 1N 50V X7R 10% 0805
C135 2N710 ELST 100U 25V
C136 2J210 MLC 1N 50V X7R 10% 0805
C137 2J210 MLC 1N 50V X7R 10% 0805
C138 2J310 MLC 10N 50V X7R 10% 0805
C141 2L110 MLC 100P 100V NPO 5% 0805
C159 2C310 MLC 10N 50V X7R 10% SM
C163 2N722 ELST 220U 16V
C164 2C210 MLC 1N0 50V X7R 10% SM
C165 2N610 ELST 10U 50V
C170 2C310 MLC 10N 50V X7R 10% SM
C171 2C310 MLC 10N 50V X7R 10% SM
C300 2C410 MLC 100N 50V X7R 10% SM
C301 2C410 MLC 100N 50V X7R 10% SM
C302 2C410 MLC 100N 50V X7R 10% SM
C303 2C410 MLC 100N 50V X7R 10% SM
C304 2C410 MLC 100N 50V X7R 10% SM
C305 2C410 MLC 100N 50V X7R 10% SM
C306 2C410 MLC 100N 50V X7R 10% SM
C307 2C410 MLC 100N 50V X7R 10% SM
C308 2C410 MLC 100N 50V X7R 10% SM
C309 2C410 MLC 100N 50V X7R 10% SM
C310 2C410 MLC 100N 50V X7R 10% SM
C311 2C410 MLC 100N 50V X7R 10% SM
C312 2N610 ELST 10U 50V
C313 2P622 ELST 22U 20V OSCON
C314 2C410 MLC 100N 50V X7R 10% SM
C316 2C047 MLC 47P 100V NPO 5% SM
C317 2C047 MLC 47P 100V NPO 5% SM
C318 2C110 MLC 100P 50V NPO 5% SM
C320 2C082 MLC 82P 50V NPO 5% SM
C321 2C047 MLC 47P 100V NPO 5% SM
C400 2C110 MLC 100P 50V NPO 5% SM
C407 2C410 MLC 100N 50V X7R 10% SM
C409 2C410 MLC 100N 50V X7R 10% SM
C410 2C410 MLC 100N 50V X7R 10% SM
C411 2C410 MLC 100N 50V X7R 10% SM
C412 2C410 MLC 100N 50V X7R 10% SM
C413 2C410 MLC 100N 50V X7R 10% SM
C414 2C410 MLC 100N 50V X7R 10% SM
C420 2C310 MLC 10N 50V X7R 10% SM
C421 2C310 MLC 10N 50V X7R 10% SM
C422 2N710 ELST 100U 25V
C500 2J210 MLC 1N 50V X7R 10% 0805
C501 2J210 MLC 1N 50V X7R 10% 0805
C600 2J210 MLC 1N 50V X7R 10% 0805
C601 2J210 MLC 1N 50V X7R 10% 0805
C700 2N610 ELST 10U 50V
D3 3AS16W DIODE SS SM BAS16W
D4 3AV99W DIODE SS SM BAV99W
D5 3AV99W DIODE SS SM BAV99W
D6 3AS16W DIODE SS SM BAS16W
D7 3AS16W DIODE SS SM BAS16W
D8 3AS16W DIODE SS SM BAS16W
D10 3AS16W DIODE SS SM BAS16W
D11 3AS16W DIODE SS SM BAS16W
D300 3AV99W DIODE SS SM BAV99W
FLT1 7G002 EMI FILTER SM NFM61R30T472
FLT300 7G002 EMI FILTER SM NFM61R30T472

L912 DAC Board Parts List Issue 2.0

Designator Part Description

HS1 F002 HEATSINK TO220 13 DEGC/W
HS1 HA3A12A M/C PAN SUPA M3x12 STBK
HS1 HJ3A00F M3 NYLOC NUT
IC2 5B6182 IC CURRENT FEEDBACK DUAL LM6182 SM
IC3 5B2134 IC OPAMP DUAL SM OPA2134PA
IC4 5B275S IC AUDIO DUAL SM OP275
IC5 5B027S IC OPAMP SM OP27
IC6 5B6182 IC CURRENT FEEDBACK DUAL LM6182 SM
IC7 5B2134 IC OPAMP DUAL SM OPA2134PA
IC8 5B797 IC OPAMP SM AD797AR
IC9 5B797 IC OPAMP SM AD797AR
IC10 5D10863S IC VREG LM1086CS-3.3
IC21 5KA100 IC AHC SN74AHC1G00
IC22 5B072D IC AUDIO SM DUAL TL072
IC23 5B275S IC AUDIO DUAL SM OP275
IC24 5B797 IC OPAMP SM AD797AR
IC25 5B797 IC OPAMP SM AD797AR
IC31 5G27512 IC CMOS EPROM 27C512 120NS
IC31 8S028 IC SOCKET 28 PIN
IC35 5D7905 IC VREG NEG 7905
IC36 5D317T IC VREG POS LM317T
IC61 5R2C002 IC CMOS FPGA ATT2C002
IC62 5D500 IC VREF POS ZRB500F01 SOT32 1%
IC63 5XDSY1 IC DCS 24/96 RING DAC
IC300 5K7404 IC HCMOS SM 74HCU04
IC301 5D78L05 IC VREG POS 78L05
IC302 5K74125V IC HCMOS SM 74VHC125
IC303 5K74125V IC HCMOS SM 74VHC125
IC304 5KA100 IC AHC SN74AHC1G00
IC305 5KA1U04 IC AHC SN74AHC1GU04
IC400 5G200 IC CD DIGITAL FILTER HDCD PMD-200
IC401 5K7474V IC VHCMOS SM 74VHC74MX
IC402 5K7474V IC VHCMOS SM 74VHC74MX
IC403 5K7474V IC VHCMOS SM 74VHC74MX
IC406 5H16C54X IC CMOS MICRO PIC16C54XT/P
IC406 8S018 IC SOCKET 18 PIN 0.3''
L1 7C033 33UH IND 2A RA 34-62086
L2 1A000 RES SM W4 2% 0R0
L3 1A000 RES SM W4 2% 0R0
L4 7C033 33UH IND 2A RA 34-62086
L5 7D247 4m7H INDUCTOR
L6 7C033 33UH IND 2A RA 34-62086
L7 7D247 4m7H INDUCTOR
L8 7D247 4m7H INDUCTOR
L9 7D247 4m7H INDUCTOR
L10 7D215 1m5H INDUCTOR
L11 7B010 10UH IND SM NL322522T-100J
L12 1A000 RES SM W4 2% 0R0
L13 1A000 RES SM W4 2% 0R0
L14 7D215 1m5H INDUCTOR
L15 7D215 1m5H INDUCTOR
L16 7D215 1m5H INDUCTOR
L17 7F004 FERRITE BD 1206 BL31A700S
L18 7F004 FERRITE BD 1206 BL31A700S
L19 7F004 FERRITE BD 1206 BL31A700S
L20 7F004 FERRITE BD 1206 BL31A700S
L21 7F004 FERRITE BD 1206 BL31A700S
L22 7F004 FERRITE BD 1206 BL31A700S
L23 7F004 FERRITE BD 1206 BL31A700S
L24 7F004 FERRITE BD 1206 BL31A700S
L25 7F004 FERRITE BD 1206 BL31A700S
L26 7F004 FERRITE BD 1206 BL31A700S

L912 DAC Board Parts List Issue 2.0

Designator Part Description

L300 7B033 33UH IND SM 1812 180mA
L301 7F004 FERRITE BD 1206 BL31A700S
L302 7F004 FERRITE BD 1206 BL31A700S
L303 7F004 FERRITE BD 1206 BL31A700S
L304 7F004 FERRITE BD 1206 BL31A700S
L305 7B010 10UH IND SM NL322522T-100J
L306 7B822 2UH2 IND SM NL322522T-2R2J
L307 7B810 1UH0 IND SM NL322522T-1R0J
L400 7F004 FERRITE BD 1206 BL31A700S
L401 7F004 FERRITE BD 1206 BL31A700S
L402 7F004 FERRITE BD 1206 BL31A700S
L403 7F004 FERRITE BD 1206 BL31A700S
PB L912PB X PRINTED CIRCUIT BOARD
R1 1L310 RES SM 0805 0.1% 10K
R2 1L2221 RES SM 0805 0.1% 22K1
R3 1A000 RES SM W4 2% 0R0
R3 1A110 RES SM W4 1% 100R 1206
R4 1A310 RES SM W4 1% 10K 1206
R5 1L310 RES SM 0805 0.1% 10K
R6 1L310 RES SM 0805 0.1% 10K
R7 1A110 RES SM W4 1% 100R 1206
R8 1A247 RES SM W4 2% 4K7
R9 1A410 RES SM W4 2% 100K
R10 1A115 RES SM W4 1% 150R
R11 1A110 RES SM W4 1% 100R 1206
R12 1A310 RES SM W4 1% 10K 1206
R13 1A310 RES SM W4 1% 10K 1206
R14 1A210 RES SM W4 2% 1K0
R15 1A010 RES SM W4 2% 10R
R16 1A422 RES SM W4 1% 220K
R17 1A247 RES SM W4 2% 4K7
R18 1A147 RES SM W4 1% 470R 1206
R19 1A210 RES SM W4 2% 1K0
R20 1A210 RES SM W4 2% 1K0
R21 1A210 RES SM W4 2% 1K0
R22 1A247 RES SM W4 2% 4K7
R23 1A222 RES SM W4 2% 2K2
R24 1A147 RES SM W4 1% 470R 1206
R25 1A115 RES SM W4 1% 150R
R26 1A210 RES SM W4 2% 1K0
R27 1L310 RES SM 0805 0.1% 10K
R28 1A000 RES SM W4 2% 0R0
R28 4JF113 TRANS JFET SM MMBFJ113
R29 1A147 RES SM W4 1% 470R 1206
R30 1A210 RES SM W4 2% 1K0
R31 1G110 RES MF FU W3 100R 5% NFR25
R32 1A310 RES SM W4 1% 10K 1206
R33 1G110 RES MF FU W3 100R 5% NFR25
R34 1A215 RES SM W4 1% 1K5 1206
R35 1A147 RES SM W4 1% 470R 1206
R36 1A210 RES SM W4 2% 1K0
R37 1A310 RES SM W4 1% 10K 1206
R38 1A215 RES SM W4 1% 1K5 1206
R39 1A311 RES SM W4 1% 11K
R40 1A010 RES SM W4 2% 10R
R41 1A010 RES SM W4 2% 10R
R42 1A210 RES SM W4 2% 1K0
R43 1A215 RES SM W4 1% 1K5 1206
R44 1A268 RES SM W4 1% 6K8 1206
R45 1A215 RES SM W4 1% 1K5 1206
R46 1A047 RES SM W4 1% 47R 1206
R47 1A315 RES SM W4 2% 15K

L912 DAC Board Parts List Issue 2.0

Designator Part Description

R48 1A315 RES SM W4 2% 15K
R49 1A315 RES SM W4 2% 15K
R50 1A047 RES SM W4 1% 47R 1206
R51 1A000 RES SM W4 2% 0R0
R52 1A147 RES SM W4 1% 470R 1206
R53 1A315 RES SM W4 2% 15K
R56 1A210 RES SM W4 2% 1K0
R57 1A210 RES SM W4 2% 1K0
R58 1A247 RES SM W4 2% 4K7
R59 1A215 RES SM W4 1% 1K5 1206
R60 1A122 RES SM W4 1% 220R 1206
R61 1A210 RES SM W4 2% 1K0
R62 1A210 RES SM W4 2% 1K0
R63 1A210 RES SM W4 2% 1K0
R64 1A210 RES SM W4 2% 1K0
R65 1A215 RES SM W4 1% 1K5 1206
R66 1A310 RES SM W4 1% 10K 1206
R67 1A210 RES SM W4 2% 1K0
R68 1A000 RES SM W4 2% 0R0
R69 1M110 RES SM 0805 100R
R70 1A010 RES SM W4 2% 10R
R74 1A410 RES SM W4 2% 100K
R75 1A210 RES SM W4 2% 1K0
R76 1A000 RES SM W4 2% 0R0
R77 1A315 RES SM W4 2% 15K
R87 1A210 RES SM W4 2% 1K0
R92 1A147 RES SM W4 1% 470R 1206
R97 1A522 RES SM W4 1% 2M2
R101 1A147 RES SM W4 1% 470R 1206
R102 1A310 RES SM W4 1% 10K 1206
R104 1A522 RES SM W4 1% 2M2
R107 1A115 RES SM W4 1% 150R
R108 1L310 RES SM 0805 0.1% 10K
R109 1A310 RES SM W4 1% 10K 1206
R111 1A010 RES SM W4 2% 10R
R114 1A410 RES SM W4 2% 100K
R115 1A422 RES SM W4 1% 220K
R117 1A210 RES SM W4 2% 1K0
R118 1A147 RES SM W4 1% 470R 1206
R119 1A115 RES SM W4 1% 150R
R120 1A310 RES SM W4 1% 10K 1206
R123 1A147 RES SM W4 1% 470R 1206
R124 1L310 RES SM 0805 0.1% 10K
R125 1L310 RES SM 0805 0.1% 10K
R128 1L2221 RES SM 0805 0.1% 22K1
R129 1L310 RES SM 0805 0.1% 10K
R132 1A410 RES SM W4 2% 100K
R133 1A215 RES SM W4 1% 1K5 1206
R134 1A210 RES SM W4 2% 1K0
R135 1A210 RES SM W4 2% 1K0
R136 1A215 RES SM W4 1% 1K5 1206
R141 1A110 RES SM W4 1% 100R 1206
R144 1A000 RES SM W4 2% 0R0
R145 1A315 RES SM W4 2% 15K
R146 1A210 RES SM W4 2% 1K0
R155 1A210 RES SM W4 2% 1K0
R162 1A315 RES SM W4 2% 15K
R166 1A247 RES SM W4 2% 4K7
R168 1A122 RES SM W4 1% 220R 1206
R169 1A227 RES SM W4 1% 2K7 1206
R170 1A227 RES SM W4 1% 2K7 1206
R171 1A522 RES SM W4 1% 2M2

L912 DAC Board Parts List Issue 2.0

Designator Part Description

R172 1A522 RES SM W4 1% 2M2
R300 1A047 RES SM W4 1% 47R 1206
R301 1A510 RES SM W4 1% 1M0
R302 1A310 RES SM W4 1% 10K 1206
R303 1A310 RES SM W4 1% 10K 1206
R304 1A247 RES SM W4 2% 4K7
R305 1A110 RES SM W4 1% 100R 1206
R306 1A110 RES SM W4 1% 100R 1206
R307 1A110 RES SM W4 1% 100R 1206
R309 1A110 RES SM W4 1% 100R 1206
R314 1A547 RES SM W4 2% 4M7
R315 1A110 RES SM W4 1% 100R 1206
R400 1A210 RES SM W4 2% 1K0
R401 1A000 RES SM W4 2% 0R0
R405 1A310 RES SM W4 1% 10K 1206
R406 1A310 RES SM W4 1% 10K 1206
R407 1A310 RES SM W4 1% 10K 1206
R408 1A310 RES SM W4 1% 10K 1206
R409 1A310 RES SM W4 1% 10K 1206
R412 1A310 RES SM W4 1% 10K 1206
R415 1A310 RES SM W4 1% 10K 1206
R416 1A310 RES SM W4 1% 10K 1206
R417 1A310 RES SM W4 1% 10K 1206
R418 1A310 RES SM W4 1% 10K 1206
R419 1A310 RES SM W4 1% 10K 1206
R420 1A310 RES SM W4 1% 10K 1206
R421 1A310 RES SM W4 1% 10K 1206
R422 1A310 RES SM W4 1% 10K 1206
R425 1A310 RES SM W4 1% 10K 1206
R700 1M310 RES SM 0805 10K
R701 1M322 RES SM 0805 22K
R800 1A110 RES SM W4 1% 100R 1206
R802 1A133 RES SM W4 1% 330R 1206
R802 1A133 RES SM W4 1% 330R 1206
R803 1A133 RES SM W4 1% 330R 1206
R804 1A110 RES SM W4 1% 100R 1206
RLY1 A205 RELAY 960 OHM 51SB12T
SH1 E821MC PHONO EMC SHIELD
SK1 8K8023 23-WAY FFC CONN VERT
SK2 8D225 PHONO SKT 4-WAY EMC GOLD
SK3 8K8032 32-WAY FFC CONN VERT
SW400 A1601 DIL 8WAY SW SM
TR1 4A849B TRANS LF SS N SM BC849B
TR2 4A849B TRANS LF SS N SM BC849B
TR3 4A859B TRANS LF SS P SM BC859B
TR4 4A859B TRANS LF SS P SM BC859B
TR5 4B5248 TRANS AUDIO DRIVER N 2SC5248
TR6 4A849B TRANS LF SS N SM BC849B
TR7 4B1964 TRANS AUDIO DRIVER P 2SA1964
TR8 4A847 TRANS LF SS N SM BC847B
TR9 4A847 TRANS LF SS N SM BC847B
TR10 4A857B TRANS LF SS P SM BC857B
TR11 4A857B TRANS LF SS P SM BC857B
TR12 4A847 TRANS LF SS N SM BC847B
TR13 4A859B TRANS LF SS P SM BC859B
TR14 4A849B TRANS LF SS N SM BC849B
TR15 4A857B TRANS LF SS P SM BC857B
TR16 4A847 TRANS LF SS N SM BC847B
TR17 4A849B TRANS LF SS N SM BC849B
TR18 4A849B TRANS LF SS N SM BC849B
TR19 4A849B TRANS LF SS N SM BC849B
TR20 4A857B TRANS LF SS P SM BC857B

L912 DAC Board Parts List Issue 2.0

Designator Part Description

TR21 4A847 TRANS LF SS N SM BC847B
TR22 4A857B TRANS LF SS P SM BC857B
TR23 4A857B TRANS LF SS P SM BC857B
TR24 4A847 TRANS LF SS N SM BC847B
TR25 4A849B TRANS LF SS N SM BC849B
TR26 4A847 TRANS LF SS N SM BC847B
TR27 4JF113 TRANS JFET SM MMBFJ113
TR29 4A859B TRANS LF SS P SM BC859B
TR30 4A849B TRANS LF SS N SM BC849B
TR31 4D10KN DIGITAL TRANS NPN SM 10KX2
TR32 4A856B TRANS LF SS P SM BC856B
TR300 4D17H TRANS NPN SM BFS17H
TR700 4AFMMT497 TRANS LF SS N SM FMMT497
TR701 4AFMMT497 TRANS LF SS N SM FMMT497
X300 7X012 CRYSTAL 16.9344MHz PARALLEL
X400 7W005 CER RESON 4.00MHz

87654321

VCCD

ASSEMBLY DETAILS
L912C10_2.2.Sch

GO

GAIN

GO

POWER SUPPLY
L912C7_2.2.SCH

GAIN

DONE

R144
0R0 SM

*

D

CLK_DAC
CLK_LATCH
CLK_PMD200

CLK_FPGA

CLKMECH

GO

CLK17M

XRST

CLK17M_5V_DAC

CLK17M_3V_LATCH

CLK17M_3V_PMD200

XRST

CLK17M_5V_FPGA

CLOCK

L912C8_2.2.SCH

CLKMECH

GO

VCCD

C88

100N SM

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15

28

VCC

14

GND

22

OE/VPP

20

CE

10

A0

9

A1

8

A2

7

A3

6

A4

5

A5

4

A6

3

A7

25

A8

24

A9

21

A10

23

2
26
27

1

A11
A12
A13
A14
A15

IC31
27C512

D0
D1
D2
D3
D4
D5
D6
D7

11
12
13
15
16
17
18
19

Power ON/OFF MUTE relay

D0
D1
D2
D3
D4
D5
D6
D7

D[0..7]

D

RLYPWR

C

B

A

DD3

FR4_MULTI

SK3

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

FFC32V

PB

PCB

L912PB_2

PCB MATERIAL

FR4, 1 OZ Cu

MULTI LAYER

RA0

R74

R166

100K SM

+

4K7 SM

C163
220U EL

TR25
BC849B

TR18
BC849B

R23

D3

MUTERLY

BAS16W SM

RLY1C

2K2 SM

R8

XRST

R114

4K7 SM

100K SM

RLY_GND

AA[0..15]

MUTERLY

MUTERLY

L[0..15]
R[0..15]
SEL[0..2]

A/D
NMODE
PMODE

RDY

ASIC DAC
L912C4_2.2.SCH

THL6

TOOLING

THL1

FIXING HOLE 3.0

THL7
FIXING HOLE 3.0

C132
1N 0805

C159
10N SM

THL4
TOOLING

THL2

FIXING HOLE 3.0

THL5

FIXING HOLE

C133
1N 0805

THL8
FIXING HOLE 3.0

C136
1N 0805

THL3
FIXING HOLE 3.0

HEATSINK SCREW CHANGE, RING DAC NAME UPDATED

CW 9-6-01

INITIALS

DATE

Date Printed

23-Jan-2002

Drawn by:

CW

1 8Sheet of

DRAWING NO.

DGND

CLKMECH
SER_CLK

SER_DIN

SER_CH

MUTE
XRST

DEEMPH
RA0

RB7
RB6
RB5
RB4
RB0
RB1
RB2
RB3

HDCDLED

EL1

Update Box

UPDATE_BOX

DD1

A3 Vertical

Paper Marker

DD_A3V
DD2

Drilling

Detail

DRILL_DWG

CLKMECH

SER_CLK

SER_DIN

SER_CH

MUTE
XRST

DEEMPH

RA0
RB7
RB6
RB5
RB4
RB0
RB1
RB2
RB3

HDCDLED

C170
10N SM

RB[0..7]

C171

10N SM

CLK_LATCH
CLK_PMD200

GO

VCCD VCCD

RB4

R106

R87

DSP HDCD

SER_DIN
SER_CLK
SER_CH

RE-LATCH
L912C9_2.2.SCH

CLK17M_3V_LATCH
CLK17M_3V_PMD200

MUTE
DEEMPH

GO

RB5

10K SM

1K0 SM

R117

R85

PCB ID

GO

HDCD

HDCDLED

BCKO

WCKO

DOL

DOR

HDCD
HDCDLED

GAIN

USE NF FILTER WHEN RUNNING RS

1K0 SM

PROGRAM

10K SM

VCCD

M2

M0

DSP

VCCD

D[0..7]

CCLK
GO
WR

SER_CLK
SER_DIN
SER_CH

FPGA
L912C2_2.2.SCH

M2
M0
DSP

MODE0
MODE1

HDCD
MUTE

CLK17M_5V_FPGA

BCKO
WCKO
DOL
DOR

R4
10K SM

VCCD

R9

R3

R12
10K SM

100K SM

*

0R0 SM

*

CCLK

WR

R13
10K SM

R28

0R0 SM

D[0..7]

RB0
RB6

HDCD
MUTE

CLK_FPGA

BCKO
WCKO
DOL
DOR

GAIN

GND

CLK_DAC

FD_1

FD_2

FD_3

FD_4

FIDUCIAL

FIDUCIAL

FD_5

FIDUCIAL

FD_6

FIDUCIAL

FIDUCIAL

FD_7

FIDUCIAL

FIDUCIAL
FD_8

FIDUCIAL

DRAWING TITLE

9 CD DAC PCB Top

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

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C1_2.2.prj

23425

Notes:

Circuit Diagram

LDC

INTR

DONE

A[0..15]

AA[0..15]

L[0..15]

R[0..15]

SEL[0..2]

A/D
NMODE
PMODE

RDYO

IC21
74AHC1G00 SM

R145

+5VCLK

RDYO

15K SM

R162

1
2

15K SM

LDC
INTR

DONE

A[0..15]

AA[0..15]

L[0..15]

R[0..15]

SEL[0..2]

R111
10R SM

L11

10UH SM

RDY

4

3 5

C110

10N SM

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01
01_1112
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

1 2 3 4 5 6 7 8

RLY 51SB12T

TR1
BC849B

C134
1N 0805

THL9
FIXING HOLE 3.0

C137
1N 0805

ISSUE

L912CT

C

B

A

2.0

87654321

BCKO
WCKO
DOL

D

DOR
CCLK
VCCD

VCCD

L6
33UH 2A RA

R41

+

BCKO

WCKO

DOL

DOR

CCLK

VFPGA

A15

A14

A13

RB6

RB0

A12

A11

AA8

AA9

AA10

A10

A10

AA11

AA12

A/D

NMODE

PMODE

A4

A5

AA13

AA14

AA15

A7

A8

A9

A8

A9

A6

A3

A0

A1

A2

VFPGA

A/D
NMODE
PMODE

D

10R SM

1

2

3

4

6

7

8

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

44

45

46

47

48

49

50

51

VSS6
VSS7
IO44/A16
IO45
IO46
IO47
IO48/A17
IO49
IO50
IO51
IO52
IO53
VDD4
IO54
IO55
IO56
IO57
IO58
IO59
IO60
IO61
VSS8
IO62
IO63
IO64
IO65
VSS9
IO66
IO67
IO68
IO69
VSS10
IO70
IO71
IO72
IO73
IO74/HDC
IO75
IO76
IO77
VDD5
IO78/LDC
IO79
IO80
IO81
IO82/INIT
IO83
IO84
IO85
IO86
VSS11
DONE

52

CCLK

VSS12

105

106

VSS5

IO43/A15

RESET

PGRM

107

108

IO40

IO41

IO42

IO87/M0

IO88

IO89

109

110

IO38

IO39/A14

IO90

IO91/M1

111

112

113

IO35

IO36

IO37/A13

IO92

IO93

IO94

114

115

116

VDD3

IO33/A11

IO34/A12

VDD6

IO95/M2

IO96

117

118

119

IO32

IO97

120

IO30

IO31

IO98

IO99/M3

121

TR_1

IO28

IO29/A10

IO100

IO101

122

123

124

IO27

IO26/A9

IO102

VSS13

125

VSS4

IO103

126

IO24

IO25/A8

IO104

IO105

127

128

IO23

IO106

129

IO22

VDD7

130

VDD2

IO107

131

IO20

IO21/A7

IO108

IO109

132

133

IO19

IO110

134

IO18

VSS14

135

136

VSS3

IO17/A6

IO111

IO112

137

IO16

IO113

138

IO15

IO14/A5

IO114

IO115/CS1

139

140

IO12

IO13/A4

IO116

IO117

141

142

IO11

IO118

143

IO10

VDD1

VDD8

IO119/CS0

144

145

IO9/A3

IO120

146

147

IO79IO8

IO6/A2

IC61
ATT2C002

IO121

IO122

IO123/RD

148

149

IO5/A1

IO124

150

151

IO35IO4

IO2/A0

IO125

IO126/WR

IO127

152

153

IO1

VSS1

VSS2

RD_DT

VSS21

IO171/TCK

IO170
IO169
IO168

IO167/TMS

IO166

IO165/TDI

IO164
IO163
IO162

VDD10

IO161/DOUT

IO160
IO159
IO158

IO157/D0

IO156
IO155

IO154/D1

VSS20

IO153/D2

IO152
IO151
IO150

VSS19

IO149/D3

IO148
IO147
IO146

VSS18

IO145/D4

IO144
IO143
IO142

IO141/D5

IO140
IO139
IO138
VDD9

IO137/D6

IO136
IO135
IO134

IO133/D7

IO132
IO131

IO130/RCLK

IO129
VSS17
VSS16

IO128

VSS15

RD/CF

154

155

156

TR_8

208
207
206
205
204
203
202
201
200
199
198
197
196
195
194
193
192
191
190
189
188
187
186
185
184
183
182
181
180
179
178
177
176
175
174
173
172
171
170
169
168
167
166
165
164
163
162
161
160
159
158
157

TR_16
TR_15

TR_13

TR_14

SEL2

D0

D1

D2

SEL1
SEL0

D3

D4

D5

TR_6
TR_7
TR_9

D6

TR_2
TR_3

D7
D8
D9
D10

TR_4

AA[0..15]

A[0..15]

SEL[0..2]

L[0..15]

R[0..15]

INTR

RDYO

AA[0..15]
A[0..15]

INTR

SEL[0..2]

RDYO

MUTE
HDCD

L[0..15]

R[0..15]

C

B

10N SM

10N SM

100U 25V ZA EL

C49

C91

C45

GND

GND

C89

MRESET must be tied LOW

WR

C

D[0..7]

LDC

DSP
SER_CLK
SER_DIN
SER_CH

DONE

RB0

RB6

LDC

DSP
SER_CLK
SER_DIN
SER_CH

DONE

R53

15K SM

MODE0
MODE1

D[0..7]

B

10N SM

C92

R0

R1
R2
R3
R4
R5

R6
R7
R8
R9
R10
R11
R12
R13

R14
R15
L15
L14

L13
L12
L11
L10

L9
L8
L7
L6

L5
L4
L3

L2
L1
L0

10N SM

TR_12

WR

TR_11

TR_10

100
101
102
103
104

53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

R47
15K SM

R48
15K SM

TR_5

GO

D23

AA0

AA1

AA2

AA4

AA5

AA6

GO

M0

AA3

M2

AA7

M0 M2

A

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

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C2_2.2.SCH

23425

D22

DRAWING TITLE

9 CD DAC DRIVER

D21

D20

D19

D18

D17

D16

Notes:

D14

D15

CLK17M_5V_FPGA

Circuit Diagram

D13

D12

D11

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01
01_1112

CW 9-6-01

HEATSINK SCREW CHANGE, RING DAC NAME UPDATED

2.0
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

INITIALS

DATE

Date Printed

23-Jan-2002

Drawn by:

CW

2 8Sheet of

DRAWING NO.

L912CT

ISSUE

A

1 2 3 4 5 6 7 8

VDDAC

87654321

SEL2

SEL1

SEL0

R15

L1

10R SM

33UH 2A RA

R49

R77

15K SM

VCCA

15K SM

D

R76

RDY

SEL[0..2]

RDY

SEL[0..2]

D

0R0 SM

AA[0..15]

L[0..15]

L[0..15]

C

B

R[0..15]

R[0..15]

AA[0..15]

L0
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
R15
R14
R13
R12
R11
R10
R9
R8
R7
R6
R5
R4
R3
R2
R1
R0

37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72

VASICDIG

AA0

AA1

AA2

AA3

AA4

AA5

AA6

AA7

31

34

36

33

29

30

A5

A135A2

A0

A432A3

A6

GNDD
VCCD
L0
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
R15
R14
R13
R12
R11
R10
R9
R8
R7
R6
R5
R4
R3
R2
R1
R0
VCCD
GNDD

A873A974A1075A1176A1277A1378A1479A1580A/D81NC82NMODE83PMODE84VCCD85GNDD

AA8

AA9

AA10

AA11

AA12

AA13

AA14

AA15

C50

C139

4N7 PP

100N 0805

14

15

27

24

26

28

25

A7

RDY

SEL1

SEL0

SEL2

VCCD

19

22

20

23

NC21NC17NC18NC

NC

NC

NC

GNDD

IC63
RING DAC

NC16NC

11

13

NC12NC

NC

NC87NC88NC89NC90NC91NC92NC93NC94NC95NC96NC97NC

86

98

9

8

10

VCCA2

GNDA2

GNDA299VCCA2

100

101

6

7

GNDA1L

GND1L(2)

VCCA1L(2)

GNDA1R

GNDA1R(2)

VCCA1R(2)

102

103

3

4

5

0VREFL

VCCA1L

VCCA1R

0VREFR

104

105

106

1

2

SPRL2

SPRL1

BIAS_L

5VREFL

OUT1L
OUT2L

OUTC_L

OUT1L
OUT2L

MID_L
FBCKLSNS(2)
FBCKLSNS(2)

FBCKLSNS
FBCKLSNS

FBCKL

FBCKL
DCSET_L
DCSET_L

DCSET_R
DCSET_R

FBCKR
FBCKR

FBCKRSNS

FBCKRSNS
FBCKRSNS(2)
FBCKRSNS(2)

MID_R

IN1R
OUT2R
OUT1R

OUTC_R

OUT2R
OUT1R

IN1R

BIAS_R

5VREFR

SPRR1

SPRR2

107

108

IN1L

IN1L

NC

NC

144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127

126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109

FLN
FL

FR
FRN

MID_L

FBCKLSNS
FBCKLSNS

FBCKL
FBCKL
DCSET_L
DCSET_L

DCSET_R
DCSET_R
FBCKR
FBCKR

FBCKRSNS
FBCKRSNS

MID_R

MID_L

FBCKLSNS
FBCKLSNS

FBCKL
FBCKL
DCSET_L
DCSET_L

DCSET_R
DCSET_R
FBCKR
FBCKR

FBCKRSNS
FBCKRSNS

MID_R

VCCA1R
VCCA1R(2)
GNDA1R(2)
GNDA1R

Left Audio Stage
L912C6_2.2.SCH

Right Audio Stage
L912C5_2.2.SCH

VCCA1L

VCCA1L(2)

GNDA1L(2)

GNDA1L

AUDIO_L

SERVQK

SERVQK

AUDIO_R

GNDA1R

GNDA1R(2)

VCCA1R(2)

VCCA1R

VCCA1L
VCCA1L(2)
GNDA1L(2)
GNDA1L

R132

-13V

TR29
BC859B

100K SM

AUDIO_L

R120

MUTERLY

10K SM

RLY1A

RLY 51SB12T

RLY 51SB12T

MUTERLY

RLY1B

OUTL

N

GNDAN

N

EMC

F

F

SK2B
PHONO4G

OUTR

1

SK2A
PHONO4G

SH1

EMC Shield

EMCPHONO

C66

1N0 SM
R70
10R SM

C164

1N0 SM

CHASS

C

B

C140
100N 0805

C85
4N7 PP

C3

+

C84

10N 0805

C138

10N 0805

C78

10N 0805

C54

10N 0805

100U CERAFINE

A/D
NMODE
PMODE

A

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

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C4_2.2.SCH

23425

DRAWING TITLE

9 CD DAC ASIC

Notes:

Circuit Diagram

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01 HEATSINK SCREW CHANGE, RING DAC NAME UPDATED
01_1112 2.0

CW 9-6-01
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

INITIALS

DATE

Date Printed

23-Jan-2002

Drawn by:

CW

3 8Sheet of

DRAWING NO.

L912CT

ISSUE

A

1 2 3 4 5 6 7 8

87654321

MIDR

FBCKR

FBCKRSNS

FBCKRSNS

FBCKR

MID_R

C20

100N PE

IC6B

7
6

LM6182 SM

IC6A

2
3

LM6182 SM

D

REF/4

10

R71
3K9 SM

-13V

REF/4

15

R72
3K9 SM

-13V

COLDR

NOT FITTED

HOTR

NOT FITTED

R61
1K0 SM

R62
1K0 SM

Cold_R

Hot_R

R54
2K2 SM

C72
1N0 PP

L5

4M7H RADIAL

L7

4M7H RADIAL

L10

1M5H RADIAL

C52
3N3 PP

L14

1M5H RADIAL

C55
3N3 PP

C61
330P PP

R14
1K0 SM

R19
1K0 SM

R20
1K0 SM

IC7A

2
3

OPA2134PA SM

USE GUARD RAIL AROUND INVERTING I/PS

1

R21
1K0 SM

R43
1K5 SM

IC7B

6
5

OPA2134PA SM

7

SERVO_R

R46
47R SM

AUDIO_R

AUDIO_R

C

FBCKR

D

FBCKRSNS

FBCKRSNS

C

FBKRSNS

FBCKR
MID_R

FBKRSNSN

+13V

C95
100N PE

C100
100N PE

-13V

REFR

TR20
BC857B

L13
0R0 SM

R107

150R SM

R101
470R SM

TR24

47P SM

DRAWING TITLE

9 CD DAC Right Audio Stage

23425

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

74

IC24B
AD797A SM

GND4

REF

DAC 5V Reference

BC847B

C121

IC24A
AD797A SM

85

6

TR21
BC847B

1

R123

470R SM

3
2

C118

100N SM

Circuit Diagram

Notes:

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C5_2.2.SCH

C34
100N PE

C33
100N PE

RFRSNS

VCCA1R(2)

VCCA1R(2)

R97

2
3

L18

7F004

L20

7F004

2M2 SM

VCCA1R

C98

10U NP

84

IC23C
OP275 SM

VCCA1R

+8V9 +8V9

REF

C108
6N8 PP

L17

+13V

5
6

7F004

L19

7F004

R124

10K 0805 0.1%

GND7

D10

-13V

SERVO_R

SERVQK

84

IC7C

OPA2134PA SM

R102

TR27
MMBFJ113

DC Servo

SERVOR

BAS16W SM

R118
470R SM

10K SM

C117

100N PE

IC22A

1

TL072 SM

134

IC6C
LM6182 SM

189

16

B

DCSET_R

A

DCSET_R

DCR

10K 0805 0.1%

10K 0805 0.1%

DCNR

100N PE

1N 0805

DCSET_R

-REF/2

1 2 3 4 5 6 7 8

100N SM

100N SM

DCSET_R

R129

R108

C115

C501

1

IC23A
OP275 SM

C22

100N SM

C23

100N SM

REFx2

C31

C32

R128

22K1 0805 0.1%

2
3

C67
100P SM

C68
100P SM

IC1-V

IC23B

7

OP275 SM
R125

10K 0805 0.1%

C114

100N PE
C500

1N 0805

R115
220K SM

DC Bias

+8V9

C126

74

100N PE

IC25B
AD797A SM

C111
100N PE

GNDA1R(2)

-5V

GNDA1R(2)

DAC 0V Reference

GNDAR

GNDA1R

C97

10U NP

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01
01_1112
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

Date Printed

0V

GNDA1R

C93

6N8 PP

CW 9-6-01

INITIALS

23-Jan-2002

DATE

L12
0R0 SM

D7 BAS16W SM

TR26
BC847B

Drawn by:

CW

TR23

BC857B

R119

150R SM

-5V

HEATSINK SCREW CHANGE, RING DAC NAME UPDATED

FBCKR

GRSNS

C120
47P SM

4 8Sheet of

Distortion Cancelation

R172
2M2 SM

R92
470R SM

TR22
BC857B

IC25A
AD797A SM

6

DRAWING NO.

8 5

1

L912CT

B

2
3

A

2.0

ISSUE

87654321

MIDL

FBCKL

FBCKLSNS

FBCKL

MID_L

FBCKLSNS

C35
100N PE

IC2A

2
3

LM6182 SM

IC2B

7
6

LM6182 SM

D

-13V

-13V

R73
3K9 SM

REF/4

R78
3K9 SM

REF/4

NOT FITTED

NOT FITTED

15

10

COLDL

HOTL

R63
1K0 SM

R64
1K0 SM

Cold_L

Hot_L

R55
2K2 SM

C73
1N0 PP

L8

4M7H RADIAL

L9

4M7H RADIAL

L15

1M5H RADIAL

C57
3N3 PP

L16

1M5H RADIAL

C59
3N3 PP

C62
330P PP

R26
1K0 SM

R30
1K0 SM

R36
1K0 SM

IC3A

2
3

OPA2134PA SM

USE GUARD RAIL AROUND INVERTING I/PS

1

R42
1K0 SM

R45
1K5 SM

IC3B

6
5

OPA2134PA SM

7

SERVO_L

R50
47R SM

AUDIO_L

AUDIO_L

C

FBCKL

D

FBCKLSNS

FBCKLSNS

C

FBKLSNS

FBCKL
MID_L

FBKLSNSN

B

A

DCSET_L

DCSET_L

+13V

L21

134

C24

100N PE
C601

7

IC4B
OP275 SM

100N SM

16

100N SM

REFx2

R2

6
5

IC2C
LM6182 SM

189

DCSET_L

DCL

R1

10K 0805 0.1%

R27

10K 0805 0.1%

DCNL

1N 0805

DCSET_L

-REF/2

1 2 3 4 5 6 7 8

C43

C40

100N SM

C39

C41

100N SM

IC4A

1

OP275 SM
R6

10K 0805 0.1%

C19

100N PE
C600

1N 0805

22K1 0805 0.1%

R16
220K SM

DC Bias

C70
100P SM

C69
100P SM

IC2-V

3
2

R5

7F004

L23

7F004

10K 0805 0.1%

D8

GND6

-13V

SERVO_L

TR28
MMBFJ113

DC Servo

SERVOL

BAS16W SM

SERVQK

84

IC3C

OPA2134PA SM

R24
470R SM

R109 10K SM

C116

100N PE

IC22B

7

TL072 SM

VCCA1L(2)

VCCA1L(2)

6
5

C48
100N PE

C47
100N PE

RFLSNS

R104

2M2 SM

L22

7F004

L24

7F004

VCCA1L

C38

10U NP

84

IC4C
OP275 SM

REF

VCCA1L

C60
100N PE

C58
100N PE

+8V9 +8V9

C51
6N8 PP

REFL

TR15
BC857B

L2
0R0 SM

R25

R29
470R SM

DRAWING TITLE

9 CD DAC Left Audio Stage

23425

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

-13V

DAC 5V Reference

150R SM

TR9

BC847B

C14

47P SM

Notes:

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C6_2.2.SCH

+13V

C44
100N PE

C42
100N PE

Circuit Diagram

IC22C
TL072 SM

IC8A
AD797A SM

85

6

TR12
BC847B

+8V9

84

1

3
2

74

IC8B
AD797A SM

REF

R18

470R SM

C17

100N SM

GND5

10U NP

C5

74

100N PE

C29
100N PE

IC9B
AD797A SM

-5V

GNDA1L(2)

GLSNS

GNDA1L(2)

C13

47P SM

Distortion Cancellation

R171

FBCKL

2M2 SM

R35
470R SM

DAC 0V Reference

GNDAL

GNDA1L

C30

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01
01_1112 2.0
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

Date Printed

0V

GNDA1L

C46

6N8 PP

CW 9-6-01

INITIALS

23-Jan-2002

DATE

L3
0R0 SM

D6 BAS16W SM

TR8
BC847B

Drawn by:

CW

TR11

BC857B

R10

150R SM

-5V

HEATSINK SCREW CHANGE, RING DAC NAME UPDATED

5 8Sheet of

DRAWING NO.

TR10
BC857B

IC9A
AD797A SM

6

8 5

1

L912CT

B

2
3

A

ISSUE

87654321

+13V

R700
10K 0805

10

L4

Vin

1N0 PP

R170

2K7 SM

1N0 PP

Not Fitted

VDDAC

VN18V

VN18

VCCD

33UH 2A RA

I

C123

+

R133
1K5 SM

I

Vin

C18

VCCD

+13V

C8

100N SM

C165
10U EL

+5VCLK

R146

*

*

R136

-13V

C96
100N SM

VP18

123456789

VP18V

VN18

C37

+

C36

*

1K0 SM

TR30
BC849B

1K5 SM

C26

470P PP

+5VCLK

R155

+

C1

4N7 PP

470U EL 25V

470U EL 25V

C53
4N7 PP

470P PP

*

HDCD 6dB Gain Shift

VCCD

1K0 SM

+

C56
100U EL

C25

R141
100R SM

I

TR6
BC849B

GND1

TR4
BC859B

GND2

Vin

R22

4K7 SM

TR3
BC859B

TR2
BC849B

4K7 SM

R17

*

C135

100U EL

IC10
LM1086 3.3V SM

Vout

R38

+

R7

1K5 SM

R31

R11

*

O

100R SM

R33
100R FU

100R FU

100R SM

R135
1K0 SM

LGAIN

TR14
BC849B

6K8 SM

TR13
BC859B

*

R134

R44

TR7
2SA1964

R39

11K SM

TR5
2SC5248

*

1K0 SM

R32

R37

FLT1
7G002

D5

10K SM

10K SM

D4

*

TR19
BC849B

*

+13V

VP13V

BAV99W DUAL SM

+

C7

100U SILMIC

C10

330P PP

+

C6

100U SILMIC

VN13V

BAV99W DUAL SM

R75

*

1K0 SM

+

C107
100U EL

+3V3

C11
470P PP

REF

+

C28

IC5B
OP27 SM

C9

330P PP

Heatsink HS1
Shared between
Q5 and Q7.

-13V

22U SILMIC

74

-5V

HS1B

TO220_TV5

R67
1K0 SM

C65
6N8 PP

C15 100N SM

R34

IC62

IC5A
OP27 SM

3
2

+

1K5 SM

VRGND

ZRB500F01

1

C12
100U EL

* Fit to HDCD version only
** Fit to DSP version only

VDAC

D

C

B

SK1
FFC23V

15

16

17

18

19

20

21

22

23

220R SM

C4
100U EL

+

100U EL

RLYPWR

O

Vout

R168

C122

1N0 PP

O

C75

1N0 PP

Vout

RLYPWRRLY_GND

RLY_GND

+13V

D1

P8V9

3V9 0W5 SM

+8V9

C2

100U EL

N5V

Not Fitted

+

+

PSU for DAC references

-5V

D2

Not Fitted

8V2 1W SM

-13V

VCCD

C21

13

14

VDIG

R40

IC36
LM317T

R169

2K7 SM

C16

IC35
7905

10N SM

11

12

10R SM

ADJ

A

Not Fitted

GAIN

G

GND

85

+13V

R59

+

6

1K5 SM

TR16
BC847B

C700
10U EL

C141
100P NPO 0805

R69
100R 0805

+13V

R66

10K SM

TR17

BC849B

R701
22K 0805

R58

R65

GO

4K7 SM

1K5 SM

TR700
FMMT497

TR701
FMMT497

VCCA

C27
10U NP

D

VCCA

C

B

GND

+

C124
10U EL

A

1 2 3 4 5 6 7 8

C104

100N SM

GND3

C109
100N SM

DRAWING TITLE

9 CD DAC PSU

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

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C7_2.2.SCH

23425

+

C125
10U EL

Notes:

C119
100N SM

Circuit Diagram

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01

01_1112
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

CW 9-6-01

INITIALS

DATE

Date Printed

23-Jan-2002

HEATSINK SCREW CHANGE, RING DAC NAME UPDATED

Drawn by:

CW

6 8Sheet of

DRAWING NO.

2.0

ISSUE

L912CT

A

87654321

VP18

IC302C

R309
100R SM

74VHC125 SM

R308
100R SM

R307
100R SM

R306
100R SM

IC302A

74VHC125 SM

R800
100R SM

R315
100R SM

C321
47P SM

CLKLAT

CLKMECH

CLK17M_5V_DAC

C325

NOT FITTED

22P SM

CLK17M_3V_LATCH

C324

NOT FITTED

22P SM

CLK17M_3V_PMD200

C323

NOT FITTED

22P SM

CLK17M_5V_FPGA

C322

NOT FITTED

22P SM

CLKMECH

D

C

L307
1U0H SM
L306
2U2H SM

C320
82P SM

9 8

10

IC303B

74VHC125 SM

5 6

4

IC303A

74VHC125 SM

2 3

1

2 3

1

IC302D
74VHC125 SM

12 11

13

R300

47R SM

L300

D

C

33UH SM

C301
100N SM

IC301
78L05 P5VCLK

I

+

C312
10U EL

Vin

Vout

GND

G

XRST

O

FLT300
7G002

C303
100N SM

R302
10K SM

R301
1M0 SM

+5VCLK

+

C313
22U EL OS

D300
BAV99W DUAL SM

R305
100R SM

GND8

C304
100N SM

VCCD

IC300E

74HCU04 SM

R304
4K7 SM

16.9344MHZNO_GR

R303
10K SM

C314

100N SM

1011

X300

IC300D

89

74HCU04 SM

C316
47P SM

GO

GO

C71
82P SM

C317
47P SM

R51
0R0 SM

R801
0R0 SM
TR300

BFS17H

R68
0R0 SM

R52
470R SM

L305
10UH SM

C318

100P SM

C307
100N SM

100N SM

330R SM

VCCD

1
2

C309

R802

3 5

+5VCLK

L303
7F004

C308

100N SM

74AHC1GU04 SM

53

2 4

R314
4M7 SM

IC304

4

74AHC1G00 SM

IC305

R803
330R SM

IC302B
74VHC125 SM

5 6

4

R804

100R SM

B

A

IC300G

74HCU04 SM

VCCD

L302

7F004

L301

C300

100N SM

7F004

14

7

VCCD

C302
100N SM

IC300F
74HCU04 SM

1213

C306
100N SM

C305

100N SM

7

14

IC302E

74VHC125 SM

DRAWING TITLE

9 CD DAC Clock

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

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C8_2.2.SCH

1 2 3 4 5 6 7 8

23425

Notes:

Circuit Diagram

+3V3

L304

7F004

C311
100N SM

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01
01_1112 2.0
01_1103 1.1AMGM 5/6/01
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

IC303E

74VHC125 SM

C310

100N SM

CW 9-6-01

INITIALS

14

7

DATE

Date Printed

23-Jan-2002

12 11

13

HEATSINK SCREW CHANGE, RING DAC NAME UPDATED

ADMIN CHANGE SCHEMATIC UPDATED TO LIBRARY TO CHANGE C320 (2C082) TO 50V

Drawn by:

CW

7 8Sheet of

IC303D

9 8

74VHC125 SM

DRAWING NO.

IC303C
74VHC125 SM

10

L912CT

B

A

ISSUE

87654321

IC403B

74VHC74MX SM

D
CLK

10N 0805

C80

C79

7

BCKI
DIN

5

LRCI
DEEMP

SMUTE
HMUTE

3

MODEA

2

MODEB

1

MODED
RESET
PINIT
PCAP
EXTAL

10

9

Q

SD

8

Q

CD

13

10N 0805

10N 0805

10N 0805

C83

C82

ONE CAPACITOR PER VCC PIN

L25

7F004

31

VCCp

GNDp33GNDq12GNDq36GNDq65GNDq88GNDa49GNDa56GNDa64GNDa72GNDd80GNDc43GNDs9GNDs22GNDs93GNDg(HCKT)

10N 0805

C87

C86

87

VCCqc11VCCqc37VCCqc66VCCqc

10N 0805

12

10N 0805

C77

C76

11

10N 0805

C420
10N SM

20

19
13
17

29
28
32
34

4

2

D

3

3 4

2

D

3

CLK

12

D

11

CLK

2

D

3

CLK

CLK

IC300B

74HCU04 SM

+3V3

IC403A

4

74VHC74MX SM

SD

CD

1

+3V3

IC401B

10

74VHC74MX SM

SD

CD

13

+3V3

IC401A

4

74VHC74MX SM

SD

CD

1

+3V3

D

C

B

CLK17M_3V_LATCH

SER_CLK

SER_DIN

SER_CH

SER_DIN

SER_CH

74VHC74MX SM

IC300A

1 2

74HCU04 SM

SER_CLK

SD

CD

1

Q

Q

Q

Q

Q

Q

5

Q

6IC402A

Q

C400

100P SM

5

6

9

8

5

6

R400

5 6

1K0 SM

IC300C

74HCU04 SM

D11
BAS16W SM

12
11

R405

D
CLK

10K SM

10

SD

CD

13

R406

10K SM

10K SM

IC402B

9

Q

8

Q

+3V3+3V3

R409

74VHC74MX SM

R408

10K SM

10K SM

R407

10N 0805

10N 0805

C74

C421

10N SM

IC401C

74VHC74MX SM

10N 0805

10N 0805

10N 0805

C99

C94

C90

89

VCCqh15VCCqh35VCCqh61VCCqh

14

VCC

GND

7

10N 0805

10N 0805

10N 0805

C103

C102

C101

79

VCCa48VCCa55VCCa63VCCa71VCCd

C407
100N SM

10N 0805

C105

VCCc42VCCs8VCCs21VCCs

10

+3V3 +3V3 +3V3

L400

7F004

DSP3V3

10N 0805

C112

C106

92

95

GNDg38GNDg75GNDg76GNDg77GNDg78GNDg81GNDg82GNDg83GNDg

IC402C

74VHC74MX SM

C410
100N SM

L26

7F004
L401

7F004

C81
10N 0805

VCCg

BCKO

DOUT/DOL

DOR

WCKO

ZERO

HDCD

GAIN

I2C/SPI

MOSI/HA0

SS/HA2

MISO/SDA

SCK/SCL

HREQ

84

7

IC400

6
14
16
4

94
91
96

18
24

23
25
26

27

PMD200

GND

14

VCC

BCKO
DOL
DOR
WCKO

C409
100N SM

C113
10N 0805

L402

7F004

+3V3

+

BCKO
DOL
DOR
WCKO

C422
100U EL

GAIN

IC403C

74VHC74MX SM

C412
100N SM

SET DITHER

SW400

1
2
3
4
5
6
7
8 9

SW DIL 8WAY SM A1601

+3V3

R412
10K SM

RESET

14

GND

7

On

R56
1K0 SM

TR31
DTRANN SM

IC406

PIC16C54XT

17
18

1
2

3
4

VCC

16
15
14
13
12
11
10

RA0
RA1
RA2
RA3

RTCC
MCLR

OSC1

16

X400
CST4.00

C413
100N SM

R415
10K SM

HDCD

R57
1K0 SM

15

L403

7F004

R416
10K SM

OSC2

5

+3V3

R417
10K SM

+3V3

TR32
BC856B

R60
220R SM

HDCDLED

RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7

VSS

C411

C414
100N SM

R420
10K SM

R418
10K SM

HDCDLED

VDD

14

HDCD

6
7
8
9
10
11
12
13

+3V3

R421
10K SM

R419
10K SM

b0
b1
b2
b3
b4
b5
b6
b7

R422
10K SM

b0
b1
b2
b3
b4
b5
b6
b7

D

C

B

+3V3

DEEMPH

MUTE

GO

CLK17M_3V_PMD200

A

1 2 3 4 5 6 7 8

DEEMPH

R401
0R0 SM

R404
22K SM

RESET

+

C401
10U EL

C131

C130

C129

C128

C127

100N 0805

100N 0805

100N 0805

100N 0805

100N 0805

C127 to C131 to be placed as close to pins 31 and 33 of Z400 as possible

DRAWING TITLE

9 CD DAC Re-clocking & PMD-200

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

Filename

J:\Change_Control\ECO_AGENDA\02_E014 A9 DAC l912AY AND L100 AY\L912_2.2.ddb - Documents\L912C9_2.2.SCH

23425

Notes:

Circuit Diagram

R425
10K SM

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT
01_E031 2.1WAF 19/12/01
01_1112
01_1084 1.1CW 30-4-01 Listening component changes
01_1078 CW 1-5-01 Production release 1.0

ECO No. DESCRIPTION OF CHANGE

CW 9-6-01

INITIALS

DATE

Date Printed

23-Jan-2002

HEATSINK SCREW CHANGE, RING DAC NAME UPDATED

Drawn by:

CW

8 8Sheet of

100N SM

DRAWING NO.

A

2.0

ISSUE

L912CT

Y500

SCREW HF4V09B

Y501

SCREW HF4V09B

Y502

SCREW HF4V09B

Y503

SCREW HF4V09B

Y504

SCREW HF4V09B

Y505

SCREW HF4V09B

IC500

IC CMOS 27C512

IC CMOS 27C512

IC501

IC PIC 16C54X

IC PIC 16C54XT

PAD500

SORBOTHANE PAD
15 X 6 X 3 mm

SORBO E802AP

PAD501

SORBOTHANE
HALF PAD

7.5 X 6 X 3 mm

SORBO HALF PAD E802AP

SC500

E806MC

E806MC

CA500

23 WAY FLEXFOIL

L805CA

CA501

32 WAY FLEXFOIL

L807CA

EDGE OF PCB FIXINGS AND SUB CHASSIS TO CASE

IC31

IC406

USED ON IC63

USED ON X300

SUB CHASSIS

USED ON SK1

USED ON SK3

Remove 'snap-off' section.

Note Orientation

9

3

4

Y506

SCREW HA3A06A

CENTRE OF PCB FIXING

Notes

1. Use half sorbathane pad, Pad501, on one side of Xtal X300

2. Use sorbathane pad Pad500 on IC63

3. Pads must NOT overhang component.

12

6

11

1

DRAWING TITLE

23425

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

A9CD DAC ASSEMBLY DETAILS

Filename:

L912C10_2.2.Sch

Notes:

Contact Engineer:

Contact Tel: [phone]XXX tel NoEngNameXXXX

02_E014 2.2WAF 23/1/02 L100AY INCORPORATED INTO DESIGN AS SHEET 10 OF CT

ECO No. DESCRIPTION OF CHANGE

INITIALS
Printed:

DATE

23-Jan-2002

2

10 10Sheet of

DRAWING NO.

L912CT

ISSUE

Transformer
Specifications

Contents

!

L859TX

!

L860TX

!

L883TX

Mechanical
Assembly

Contents

!

General assembly
parts list

CD23 (TEXT) General Assembly Parts List

ITEM 230V 115V 100V WFC23P 8
L815RC REMOTE CONTROL 1

L859TX L859TX L862TX FMJ PCB TRANSFORMER 1

E850PM E850PMB FMJ MAINS BUTTON 1
E887PM DiVA POWER BUTTON ADAPTER 1
E069AY E069AYB DRAWER FRONT 1
E073AY E073AYB FASCIA ASSEMBLY 1
E843CP E843CPB COVER PLATE 1
HA4V 06S HA4V06B M/C TORX M4X6 SIDE COVER TO CHASSIS 4
B2012 SONY MECH 1
C11166 C11256 C11316 MAINS FUSE 1

E100AY
E71501 FOAM DOUBLE SIDED TAPE ON MECH 100MM
E074AY REAR PANEL ASSEMBLY 1

E082AY CHASSIS ASSEMBLY 1

E939MC DAMPING PLATE FIT TO INSIDE CHASSIS 1

E808MI MAINS INSULATOR UNDER MOTHER PCB 1

E811AP FMJ CD DRAWER ADHESIVE PAD 1

E822PM1 FOOT 4

E879SL PRODUCT CONFIGURATION CONTROL LABEL CHASSIS 1

E887S L FMJ CD23 FUSE LABEL 1

F022 FUSE HOLDER COVER FOR FUSE HOLDERS 2

F065 CABLE CLIP TORROID CABLES TO DAC FIXINGS 4

F203 50MM TOROID CLAMP TOROID TRANSFORMER 1

F204

H037 44MM STAND OFF SUB CHASSIS FIXING

HA3V10A M3 x 10mm MACHINE SCREW MOTHER, DISP, IR PCBS TO CHASSIS 17

HA4A12B M/C PAN SUPA M4X12 STBK (500) EARTH LEAD TO CHASSIS 1

HA3V05B M/C TORX M3X5 MECH 3

HA5L25A M5 x 25mm HEX CAP SCREW TOROID TO CHASSIS 1

HE6V06B No. 6 x 6mm SELF TAPPER FACIA ASSEMBLY TO CHASSIS 4

HF4V09B No. 4 x 9mm SELF TAPPER REAR PAN, DAC ASSY 15

HJ 4A 00A NUT M4 FULL STZP (1000) EARTH LEAD TO CHASSIS 1

L805CA 23-WAY FLEX-FOIL DAC PCB 1

L806CA 5-WAY RIBBON & CONNS CD MECH. 1

L807CA 32-WAY FLEX-FOIL (ENDS FACING SAME WAY) DAC PCB 1

L860CA 32-WAY FLEXFOIL (ENDS FACING OPP WAY) DISPLAY PCB 1

L811CA3 23-WAY FLEX-FOIL CD MECH. 1

L860TX L860TX L883TX FMJ CD TOROID TRANSFORMER 1

L935AY WFC23T 1A CD23T MOTHER PCB 1

SL025 LASER WARNING FOR REAR PANEL 1

SL115 LASER LABEL FOR INSIDE OF CHASSIS 1

SILVER

50MM NEOPRENE WASHER TOROID TRANSFORMER 2

WFC23P 8B
BLACK

DESCRIPTION WHERE USED QTY

DAC SUB-CHASSIS ASSY 1

ARCAM

All parts can be ordered via [e-mail]

Pembroke Ave, Waterbeach, Cambridge, CB5 9PB, ENGLAND

TEL: [phone] FAX: [phone]