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