ARCAM CD 7, CD 8 Service Manual

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

Arcam Alpha 7/8/9 CD Service Manual

Issue 1 Serial No. 0001 - (Paul Newton July 96)

Circuit Description

The following notes describe the operation of the
Alpha 7/8/9 CD players. They include the circuitry on
the main, DAC and display PCBs but not that on the
servo PCB attached to the mechanism.

Power Supplies

The mains input is fitted with inductors L2,3,6,7 to
filter electromagnetic interference coming out of the
player.
Mains transformer T201 has three secondary
windings supplying two separate power supplies and
an AC supply for the display filament:

Analogue Supply
Bridge rectifier D4,5,6,7 and reservoir capacitors

C209-C212 produce unregulated split rails of about
+/-22V.
Z204 and Z205 provide regulated outputs of +18V
and -18V respectively that power the opamps in the
audio output stage.
Since there is no power switch on this secondary, the
analogue supplies are always connected.

Digital Supply

DAC & Audio Outputs (Alpha 7 only)

The DAC is a Delta-Sigma design from Burr Brown,
the PCM1710U.
The serial digital data from the decoder Z206 is input
to pins 1 to 3. The system clock is input to pin 5.

The DAC is powered entirely from one 5V supply,
although it is split and decoupled between the
analogue and digital sections of the device.

The analogue outputs from each channel are
processed identically.Three poles of filtering are
provided by the active filter based around Z1-A. Z1-B
buffers the audio output and sets the output level.

Muting is provided by turning on Q1 and Q101.

DAC & Audio Outputs (Alpha 8 only)

This is a similar circuit as the one used on the Arcam
Alpha 6 DAC PCB but designed for Sony format
input data and a better digital filter, the SM5843AP1,
Z14.The digital filter is used with a SM5864AP 20-bit
DAC chip, Z12, (described here as a PWM noise
shaper to avoid confusion with the 1-bit DAC Latch
which follows it). The output from this is re-latched by
Z7, Z8.
Digital FilterA PIC micro on the mother board
controls the filter with the signals RB0 to RB7. The
SM5843 filter has internal pull-up resistors on its
inputs resulting in RB4 & RB5 being logic 1.

Switch SW201-A disconnects the digital secondary
winding when the 'Power' switch is out.

An unregulated supply of about 11V is produced by
the bridge rectifier D8,9,10,11 and reservoir
capacitor C36.
This is then regulated to provide three +5 volt
supplies (Z208 general logic supply, Z207 DAC
supply, Z203 system clock generator supply) and a
+7.3v supply for themechanism and motor drive
circuits(Z206).

A -30v supply is formed by Z209 and associated
components to power the display grid.

Muting

When the unit is turned off SW201-A discharges
capacitor C29 quickly. This along with the AMUTE
signal from the microprocessor, controls the output
mute transistors Q1,101 via level shifter Q3.

Clock Generator

The system clock is generated by a discrete oscillator
based around Q2 and 16.9344MHz oscillator X1. The
output of Q2 is amplified and buffered by inverters
Z202-E & D and sent to the clock input of the DAC
Z201.

The SM5843APT requires several control lines from
the PIC...
RB7 FSEL2, Selects sampling rate for de-emphasis.
Static low for 44.1K.
RB6 FSEL1, Selects sampling rate for de-emphasis.
Static low for 44.1K.
RB5 IW2N, Selects input word length. Static high for
16 bits.
RB4 MDT, Serial data input for volume control. Burst
at switch-on for setting to full.
RB3 RSTN, Reset line. Short pulse low at switch on,
then static high.
RB2 MLEN, Serial data latch input for volume
control.

RB1 MCK, Serial clock input for volume control.
RB0 Not connected.

No Dither On Silence

The digital filter adds ‘dither’ to the output signal.
This improves the low-level performance of the DAC.
The PWM filter normally mutes when it detects
digital silence to prevent any unwanted noise and
idle-tones on the audio outputs when no music is
playing. A slight click is audible when this happens.
Unfortunately, the added dither prevents this mute
from operating because it holds it open. Q11 detects
digital silence on the data input to the filter. When
silence is detected, the dither function is switched off

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

allowing the PWM filter’s mute to operate as normal.

Mute Relay

The mute relay is controlled from the PIC micro via
RA0 after switch-on. In Standby mode, XRST is low
which interrupts the relay via Q9. RA0 is low when
the CD player comes out of standby mode and goes
high after a short settling delay.
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.

PWM noise shaper

To reduce EMC, the clock signal going into this chip,
Z12, is very weak on the XTI pin (23) pin, taken
directly off Q5. This is amplified so that there should
be a larger signal on the CKO pin (26).
The PWM output on pins 11, 13, 16 and 18 can be
resolved into an audio waveform on a scope simply
by measuring them through a 100K resistor. The
same is true for the PWM signals through the latch
and the level shifter.

Latch

The PWM data from Z12 is re-latched using 74HC74

latches, Z7 and Z8.The power supply for these chips
is the DAC voltage reference and the output drives
the analogue filter stage directly. The latches reduce

any edge-timing jitter induced on the PWM signal
coming from Z12.

Analogue filter

The first half of the analogue filter, Z3 and Z4 is
balanced. The signal through one side of the op-amp,
pin 1, should be phase inverted with respect to the
other, pin 7. These signals should be viewed on a
scope through a 100K resistor since there may still
be quite a lot of RF noise on the signal.
Z1 and Z2 filter the audio signal further and also
convert the balanced signal into a single ended
signal. Z18 acts as a DC servo to reduce the output
offset voltage. This has a very large time constant so
an offset as high as 50mV is possible when the unit
is first plugged in. This reduces to less than 3mV
after 10 minutes and stays low if the unit is switched
off and on with the Standby button.

Sony Format Digital

Audio

Control from PIC micro

(Z211) on main pcb

Clock

SM5843AP1

Digital Filter,

Z14

SM5864 PWM

Noise Shaper, Z12

16.9344MHz Low-Jitter

System Clock, X1, Q5 & Z13

74HC74
Latches,

Z7 & Z8

Analogue Filter,

Z1, Z2, Z3, Z4

Audio out

Block Diagram of Alpha 8 DAC PCB

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

Test Points Marked on Circuit Diagram Only

Test Points Measurement Information

17MHz
AGND
AMUTE
CK
DA
CLKSYNC
DEEM
DGND
LOUT
LR
MUTERLY

N15
N18V
P5V(0)
P5V(1)

Clock Output to mother board. 16.9344MHz +/- 40ppm, 4V to 5V peak to peak square wave.
Analogue ground point.
Digital audio mute input on SK203. 0V=off, 5V=Mute.
Serial Data clock input on SK203. Sony format.
Serial Data data input on SK203. Sony format.
Crystal clock override. A 16.9344MHz HCMOS clock can be injected from an external source.
De-emphasis select input on SK203. 0V=off, 5V=On.
Digital ground point.
Left channel audio output at SK1. Measure d.c. offset at switch-on and after 1 minute, see specifications.
Serial Data LR input on SK203. Sony format.
Mute Relay Voltage. Equal to RLYPWR voltage when output is muted and 0V d.c. +0.5V,-0.0V when

output is un-muted.
Regulated analogue supply. -15V d.c. +/- 0.6V.

-18.45V d.c. +/- 0.5V supply input on SK204 for analogue.
+5V d.c. +/- 0.3V digital filter supply input on SK204.
+5V d.c. +/- 0.3V PWM noise shaper supply input on SK204.

P5VCLK
P15
P18V(0)
P18V(1)
PWRGND
RA0
RB0-RB7
REFL
REFR
RLYPWR
ROUT

SRVL
SRVR
SYSCLK

Regulated clock supply. +5V d.c. +/- 0.3V.
Regulated analogue supply. +15V d.c. +/- 0.6V.
+18.45V d.c. +/- 0.5V supply input on SK204 for analogue.
+18.45V d.c. +/- 0.5V supply input on SK204 for clock and latch.
Power ground point. Used by mute relay only.
Mute relay control from PIC micro on SK203.
Control lines from PIC micro on SK203.
DAC reference voltage, left channel. +5V +/- 0.3V.
DAC reference voltage, right channel.
+12V d.c. +/- 1V supply input for mute relay on SK204.
Right channel audio output at SK1. Measure d.c. offset at switch-on and after 1 minute, see

specifications.
Left d.c. servo voltage. -10 to +10V d.c.
Right d.c. servo voltage.
Clock used by latches. 4V to 5V peak to peak square wave at 16.9344MHz.

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

Disc Transport Module

The CDM 14 module comprises the disc loading
mechanism, laser assembly, RF amplifier and
analogue signal processing. All the servo control and
motor drive circuits are also included.

Digital Signal Processor

Mute, attenuation and de-emphasis functions are
controlled via a three-wire serial bus from the system
controller (Z212) to pins 26, 27 & 28 of the DAC
(Z201).

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

A digital output complying to the SPDIF standard is
generated by the decoder on the mechanisim
assembly. This is passed through an isolating
transformer, T202, to the digital output socket SK5.

System Controller

The CXP826P16Q system controller (Z212) is a
combined CD player controller, keyboard scanner,
remote control decoder and fluorescent display
driver. It's clock is generated by 4.00MHz resonator
X201.

The controller detects the position of the disc drawer
from the status of two microswitches, INSW &
OUTSW, on socket SK205. The drawer motor is
controlled via motor driver Z210

3. Unplug the unit from the mains.

4. Push the tray front upwards to remove it
from the tray. Push the tray in manually.

5. Remove the 4 screws holding the front panel
to the chassis and release the locating tabs.

6. Unplug the flexfoil from the display board
where it enters the main pcb.

7. Remove the 2 screws holding the remote
receiver pcb in place.

8. The front panel can now be pulled off the
unit.

9. To remove the display pcb remove the 6
screws holding the board in place.

To remove the main pcb first remove the DAC board
if it is an Alpha 8 or 9 CD player.

1. Remove the 3 screws holding the audio
output sockets to the rear panel and 2
screws holding the aluminium extrusion in
place.

2. Squeeze the tops of the 2 pcb pillars and lift
the board up slightly to clear them .

3. Remove the 2 flexfoils from the DAC board.

The DAC board, still attached to the extrusion, can
now be removed from the unit.

To remove the main pcb remove the 8 pcb securing
screws and the screw holding the digital ouput socket
to the chassis. (On Alpha 7 CDs also remove the 3
screws securing the audio ouput sockets in place).
Release the cables which connect the mechanism to
the main board.

The main pcb can now be slid out of the case.

The keyboard scanning works by connecting the keys
to a resistor ladder on an ADC (analogue to digital
convertor) input to the microcontroller. Pressing a
key presents a unique voltage to this input.

The signal from the remote control receiver is input
to RMIN (pin 2) after first passing through the PIC
microcontroller, Z211, on the small remote receiver
pcb. This PIC ic converts the RC-5 format codes
from the remote control handsets to NEC data,
suitable for the Sony chipset. It also controls
theconfiguration of the digital filter/DAC on the Alpha
8 and 9 DAC boards the The remote control data
contains a ‘customer code’ that identifies it as an
Arcam product.The microcontroller is confiqured to
accept this code by means of the diode network
D291 to D297.

Disassembly For Servicing

To remove the boards within the CD players follow
the instructions below.

1. Remove the top cover.

2. Press load to eject the CD tray.

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

Alpha 7/8/9 Main PCB Parts List

Ref. No. Description Part No.

C2 PPRO 680P 63V 5% RA 2D168

C3 PPRO 680P 63V 5% RA 2D168

C4 ELST NON POLAR 10UF 35V 2U610

C5 PPRO 100P 63V 5% RA 2D110N

C6 PPRO 680P 63V 5% RA 2D168

C7 PPRO 680P 63V 5% RA 2D168

C10 CERD 1N0 63V 2A210

C11 CERD 10N 100V 20% 2A310

C12 CERD 10N 100V 20% 2A310

C13 CERD 33P 63V 2A033

C14 CERD 33P 63V 2A033

C15 CERD 100P 63V 2A110

C16 CERD 100P 63V 2A110

C17 CERD 10N 100V 20% 2A310

C18 CERD 10N 100V 20% 2A310

C19 CERD 10N 100V 20% 2A310

C20 PPRO 680P 63V 5% RA 2D168

C21 ELST NON POLAR 10UF 35V 2U610

C22 ELST 100U 25V 2N710

C23 ELST 100U 25V 2N710

C24 ELST 100U 25V 2N710

C25 ELST 22U 20V OSCON 2P622

C26 ELST 100U 25V 2N710

C27 ELST 10U 50V 2N610

C28 CERD 470P 63V 2A147

C29 ELST 100U 25V 2N710

C32 CERD 10N 100V 20% 2A310

C33 ELST 1M0 25V 2N810

C34 ELST 100U 100V 2N710B

C35 ELST 100U 100V 2N710B

C36 ELST 3M3 25V 2N833

C37 ELST 10U 50V 2N610

C38 ELST 10U 50V 2N610

C39 ELST 100U 25V 2N710

C40 ELST 100U 25V 2N710

C41 ELST 100U 25V 2N710

C42 ELST 100U 25V 2N710

C43 ELST 1M0 25V 2N810

C44 ELST 1M0 25V 2N810

C45 ELST 1M0 25V 2N810

C46 ELST NON POLAR 10UF 35V 2U610

C47 ELST 1M0 25V 2N810

C48 ELST 1M0 25V 2N810

Alpha 7/8/9 Main PCB Parts List

Ref. No. Description Part No.

C49 ELST 10U 50V 2N610

C50 ELST 10U 50V 2N610

C51 ELST 1M0 25V 2N810

C52 CERD 10N 100V 20% 2A310

C53 ELST 22U 20V OSCON 2P622

C54 CERD 10N 100V 20% 2A310

C55 CERD 10N 100V 20% 2A310

C56 ELST 10U 50V 2N610

C102 PPRO 680P 63V 5% RA 2D168

C103 PPRO 680P 63V 5% RA 2D168

C104 ELST NON POLAR 10UF 35V 2U610

C105 PPRO 100P 63V 5% RA 2D110N

C291 CERD 47N 63V 10% 2A347

C292 ELST 100U 25V 2N710

C293 CERD 47N 63V 10% 2A347

C294 CERD 47N 63V 10% 2A347

D1 SSDIODE 1N4148 75V 3A4148

D2 SSDIODE 1N4148 75V 3A4148

D3 SSDIODE 1N4148 75V 3A4148

D4 RECTIFIER 1N4003F 1A 200V 3B4003

D5 RECTIFIER 1N4003F 1A 200V 3B4003

D6 RECTIFIER 1N4003F 1A 200V 3B4003

D7 RECTIFIER 1N4003F 1A 200V 3B4003

D8 RECTIFIER 1N4003F 1A 200V 3B4003

D9 RECTIFIER 1N4003F 1A 200V 3B4003

D10 RECTIFIER 1N4003F 1A 200V 3B4003

D11 RECTIFIER 1N4003F 1A 200V 3B4003

D12 RECTIFIER 1N4003F 1A 200V 3B4003

D13 RECTIFIER 1N4003F 1A 200V 3B4003

D14 RECTIFIER 1N4003F 1A 200V 3B4003

D15 RECTIFIER 1N4003F 1A 200V 3B4003

D16 RECTIFIER 1N4003F 1A 200V 3B4003

D17 ZENER 15V 400MW 3C11504

D18 ZENER 7V5 400MW 3C07504

D19 ZENER 4V7 400MW 3C04704

D20 ZENER 4V7 400MW 3C04704

D21 SSDIODE 1N4148 75V 3A4148

D22 RECTIFIER 1N4003F 1A 200V 3B4003

D23 RECTIFIER 1N4003F 1A 200V 3B4003

D291 SSDIODE 1N4148 75V 3A4148

D292 SSDIODE 1N4148 75V 3A4148

D293 SSDIODE 1N4148 75V 3A4148

D294 SSDIODE 1N4148 75V 3A4148

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

D295 SSDIODE 1N4148 75V 3A4148

D296 SSDIODE 1N4148 75V 3A4148

D297 SSDIODE 1N4148 75V 3A4148

DISP301 DISPLAY ALPHA 7/8/9 (SONY) B1008

F1 INS COVER PCB FUSEHOLDER F022

F1 FUSE 20mm 160mA T C11166

F1 / FUSEHOLDER 20mm PCB 8S004

F2 / FUSEHOLDER 20mm PCB 8S004

F2 INS COVER PCB FUSEHOLDER F022

F4 FUSE 20mm 160mA T C11166

F4 SPARE FUSEHOLDER F062

HS1 HEATSINK TO220 CLIP 30 F007

HS2 HEATSINK TO220 8.6 DEGC/W F008

HS2 HEATSINK CLIP TO220 13/8.6 DC/W F006

L1 FERRITE BEAD SINGLE AXIAL TAPED 2K BOX 7F003

L2 INDUCT 1R0 283AS-1R0K 34-10914 7D001

L3 INDUCT 1R0 283AS-1R0K 34-10914 7D001

L4 33UH IND 34-48330 7D033

L5 33UH IND 34-48330 7D033

L6 6U8H INDUCTOR 7D968A

L7 6U8H INDUCTOR 7D968A

LED201 LED RED 5MM 3D5119

LED301 LED GREEN 5MM 3D001

LK101A JUMPER 4-WAY LEAD L814CA

PAD1 Alpha 7/8/9 CD SUPPORT PAD E805AP

PL1 16 WAY DIL PIN HEADER 8K6316

Q1 TRANS LF SS N BC547B 4A547

Q2 TRANS LF SS N BC547B 4A547

Q3 TRANS LF SS P BC557B 4A557

Q4 TRANS LF SS N BC547B 4A547

Q5 TRANS LF SS N BC547B 4A547

Q6 TRANS LF SS N BC547B 4A547

Q101 TRANS LF SS N BC547B 4A547

R2 RES MF W4 3K9 1% 1H239

R3 RES MF W4 3K9 1% 1H239

R4 RES MF W4 3K9 1% 1H239

R5 RES MF W4 1% 10K 1H310

R6 RES MF W4 1% 10K 1H310

R7 RES MF W4 1% 33K 1H333

R8 RES MF W4 3K9 1% 1H239

R9 RES MF W4 3K9 1% 1H239

R10 RES MF W4 22K 1% 1H322

R11 RES MF W4 120R 1% 1H112

R12 RES MF W4 22R 1% 1H022

R13 RES MF W4 1% 10K 1H310

R14 RES MF W4 1% 10K 1H310

R15 RES MF W4 1% 10K 1H310

R16 RES MF W4 330R 1% 1H133

R17 RES MF W4 1% 10K 1H310

R18 RES MF W4 1% 33K 1H333

R19 RES MF W4 1% 33K 1H333

R20 RES MF W4 22R 1% 1H022

R21 RES MF W4 470R 1% 1H147

R22 RES MF W4 1% 220R 1H122

R23 RES MF W4 120R 1% 1H112

R24 RES MF FU W3 5% 10R NFR25 1G010

R25 RES MF W4 120R 1% 1H112

R26 RES MF W4 100K 1% 1H410

R27 RES MF W4 100K 1% 1H410

R28 RES MF W4 1% 10K 1H310

R29 RES MF W4 1% 1K0 1H210

R30 RES MF W4 1% 10K 1H310

R31 RES MF W4 330R 1% 1H133

R32 RES MF W4 330R 1% 1H133

R33 RES MF W4 330R 1% 1H133

R34 RES MF W4 1% 10K 1H310

R35 RES MF W4 4M7 1% 1H547

R36 RES MF W4 1% 620R 1H162

R37 RES MF FU W3 5% 10R NFR25 1G010

R38 RES MF W4 330R 1% 1H133

R39 RES MF W4 1% 220R 1H122

R40 RES MF W4 1% 220R 1H122

R41 RES MF W4 1K6 1% 1H216

R42 RES MF W4 1% 1K0 1H210

R43 RES MF W4 330R 1% 1H133

R44 RES MF FU W3 5% 3R3 NFR25 1G833

R45 RES MF FU W3 5% 3R3 NFR25 1G833

R46 RES MF W4 3K0 1% 1H230

R47 RES MF W4 3K0 1% 1H230

R48 RES MF FU W3 5% 10R NFR25 1G010

R49 RES MF W4 120R 1% 1H112

R50 RES MF W4 100K 1% 1H410

R51 RES MF FU W3 22R 5% NFR25 1G022

R52 RES MF FU W3 22R 5% NFR25 1G022

R53 RES MF W4 1% 33K 1H333

R54 RES MF W4 330R 1% 1H133

R55 RES MF W4 1% 680R 1H168

R56 RES MF W4 330R 1% 1H133

R57 RES MF W4 330R 1% 1H133

R58 RES MF FU W3 5% 10R NFR25 1G010

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

R59 RES MF W4 330R 1% 1H133

R60 RES MF W4 1% 8K2 1H282

R61 RES MF W4 1% 8K2 1H282

R62 RES MF W4 330R 1% 1H133

R63 RES MF W4 1% 33K 1H333

R64 RES MF FU W3 5% 10R NFR25 1G010

R102 RES MF W4 3K9 1% 1H239

R103 RES MF W4 3K9 1% 1H239

R104 RES MF W4 3K9 1% 1H239

R105 RES MF W4 1% 10K 1H310

R106 RES MF W4 1% 10K 1H310

R107 RES MF W4 1% 33K 1H333

R108 RES MF W4 3K9 1% 1H239

R109 RES MF W4 3K9 1% 1H239

R110 RES MF W4 22K 1% 1H322

R111 RES MF W4 120R 1% 1H112

R112 RES MF W4 22R 1% 1H022

R113 RES MF W4 1% 10K 1H310

R291 RES MF FU W3 5% 3R3 NFR25 1G833

R292 RES MF W4 1% 8K2 1H282

R293 RES MF W4 1% 8K2 1H282

R294 RES MF W4 1% 1K0 1H210

R295 RES MF W4 1% 10K 1H310

R296 RES MF W4 1% 10K 1H310

R297 RES MF W4 1% 10K 1H310

R298 RES MF W4 1% 10K 1H310

R301 RES MF W4 1% 33K 1H333

R302 RES MF W4 1% 12K 1H312

R303 RES MF W4 1% 5K6 1H256

R304 RES MF W4 1% 3K3 1H233

R305 RES MF W4 1% 2K2 1H222

R306 RES MF W4 1% 1K5 1H215

R307 RES MF W4 1% 1K2 1H212

R308 RES MF W4 1% 8K2 1H282

R309 RES MF W4 1% 3K3 1H233

R310 RES MF W4 1% 2K2 1H222

R311 RES MF W4 1% 1K5 1H215

R312 RES MF W4 1% 1K2 1H212

R313 RES MF W4 1% 8K2 1H282

R314 RES MF W4 1% 220R 1H122

RX201 REMOTE CONTROL RX SBX1610-62 38KHZ B2103

SH1 PHONO EMC SHIELD E808MC

SK1 IEC MAINS 2-PIN PCB 8A014

SK2 8+8 WAY FEMALE HORIZ SKT 8K6416

SK4 PHONO SKT 2-WAY HOR EMC 8D222

SK5 PHONO SKT SINGLE EMC 8D220

SK201 23-WAY FFC CONN VERT 8K8023

SK203 32-WAY FFC CONN VERT 8K8032

SK204 23-WAY FFC CONN VERT 8K8023

SK205 5-WAY AMP CT CONN 8K2005

SK291 32-WAY FFC CONN VERT 8K8032

SK301 32-WAY FFC CONN HORIZ 8K8132

SW201 SW PUSH 4PCO A1014

SW301 TACT SWITCH 2-PIN LOW PROF A1504

SW302 TACT SWITCH 2-PIN LOW PROF A1504

SW303 TACT SWITCH 2-PIN LOW PROF A1504

SW304 TACT SWITCH 2-PIN LOW PROF A1504

SW305 TACT SWITCH 2-PIN LOW PROF A1504

SW306 TACT SWITCH 2-PIN LOW PROF A1504

SW307 TACT SWITCH 2-PIN LOW PROF A1504

SW308 TACT SWITCH 2-PIN LOW PROF A1504

SW309 TACT SWITCH 2-PIN LOW PROF A1504

SW310 TACT SWITCH 2-PIN LOW PROF A1504

SW311 TACT SWITCH 2-PIN LOW PROF A1504

SW312 TACT SWITCH 2-PIN LOW PROF A1504

T201 ALPHA 7 CD MAINS TRANSFORMER L811TX

T202 DIGITAL OUTPUT COUPLER K 7E015

X1 CRYSTAL 16.9344MHz PARALLEL 7X012

X201 CER RESON 4.00MHz 7W005

Z1 IC OPAMP DUAL NJM2114D 5B2114

Z101 IC OPAMP DUAL NJM2114D 5B2114

Z201 IC CD DAC PCM1710U 5G1710

Z202 IC HCMOS 74HCU04 5J7404

Z203 IC VREG POS 78L05 5D78L05

Z204 IC VREG POS LM317T 5D317T

Z205 IC VREG POS LM337T 5D337

Z206 IC VREG POS LM317T 5D317T

Z207 IC VREG POS LM317T 5D317T

Z208 IC VREG POS 7805 5D7805

Z209 IC VREG NEG 7915 5D7915

Z210 IC MOTOR DRIVER LB1641 5Q1641

Z211 IC CMOS MICRO PIC16C54XT/P 5H16C54X

Z211 IC SOCKET 18 PIN 0.3'' 8S018

Z212 IC CD CXP826P16Q MICRO 5G826

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

Alpha 8 DAC PCB Only Parts List

Ref. No. Description Part No.

C1 PPRO 2N7 63V 5% RA 2D227

C2 PPRO 2N7 63V 5% RA 2D227

C3 PPRO 2N7 63V 5% RA 2D227

C4 PPRO 2N7 63V 5% RA 2D227

C5 PPRO 2N7 63V 5% RA 2D227

C6 PPRO 2N7 63V 5% RA 2D227

C7 PPRO 1N0 63V 5% RA 2D210

C8 PPRO 1N0 63V 5% RA 2D210

C9 PPRO 1N0 63V 5% RA 2D210

C10 PPRO 1N0 63V 5% RA 2D210

C11 PPRO 1N0 63V 5% RA 2D210

C12 PPRO 1N0 63V 5% RA 2D210

C13 PPRO 470P 63V 5% RA 2D147N

C14 PPRO 470P 63V 5% RA 2D147N

C15 PPRO 470P 63V 5% RA 2D147N

C16 PPRO 470P 63V 5% RA 2D147N

C17 MLC 100P 100V NPO 5% SM 2C110

C18 ELST 10U 50V 2N610

C19 ELST 10U 50V 2N610

C20 PPRO 1N3 63V 5% RA 2D213N

C21 ELST 10U 50V 2N610

C22 PCRB 100N 100V 5% RA 5mm 2H410

C23 ELST 10U 50V 2N610

C24 ELST NON POLAR 10UF 35V 2U610

C25 ELST NON POLAR 10UF 35V 2U610

C26 PPRO 4N7 63V 5% RA 2D247N

C27 PCRB 100N 100V 5% RA 5mm 2H410

C29 ELST 10U 50V 2N610

C30 PPRO 4N7 63V 5% RA 2D247N

C34 MLC 10N 50V X7R 10% SM 2C310

C35 MLC 470P 100V NPO 5% SM 2C147

C36 MLC 470P 100V NPO 5% SM 2C147

C37 MLC 10N 50V X7R 10% SM 2C310

C38 MLC 10N 50V X7R 10% SM 2C310

C39 MLC 10N 50V X7R 10% SM 2C310

C40 MLC 10N 50V X7R 10% SM 2C310

C41 MLC 10N 50V X7R 10% SM 2C310

C42 PPRO 470P 63V 5% RA 2D147N

C43 PPRO 470P 63V 5% RA 2D147N

C44 PPRO 470P 63V 5% RA 2D147N

C45 PPRO 470P 63V 5% RA 2D147N

C46 MLC 100P 100V NPO 5% SM 2C110

C47 MLC 47P 100V NPO 5% SM 2C047

Alpha 8 DAC PCB Only Parts List

Ref. No. Description Part No.

C49 ELST 22U 20V OSCON 2P622

C50 ELST 22U 20V OSCON 2P622

C53 ELST 220U 16V 2N722

C55 MLC 100N 50V X7R 10% SM 2C410

C56 ELST 100U 25V 2N710

C57 ELST 100U 25V 2N710

C58 ELST NON POLAR 10UF 35V 2U610

C59 ELST NON POLAR 10UF 35V 2U610

C60 PPRO 4N7 63V 5% RA 2D247N

C61 PPRO 4N7 63V 5% RA 2D247N

C62 MLC 10N 50V X7R 10% SM 2C310

C63 ELST 470U 25V RA 2N747

C64 ELST 470U 25V RA 2N747

C65 MLC 10N 50V X7R 10% SM 2C310

C66 ELST NON POLAR 2.2UF 50V 2V522

C67 ELST NON POLAR 2.2UF 50V 2V522

C68 MLC 10N 50V X7R 10% SM 2C310

C69 MLC 33P 100V NPO 5% SM 2C033

D1 SSDIODE 1N4148 75V 3A4148

D2 SSDIODE 1N4148 75V 3A4148

L1 33UH IND SM 1812 180mA 7B033

L2 33UH IND SM 1812 180mA 7B033

L3 33UH IND SM 1812 180mA 7B033

L4 33UH IND SM 1812 180mA 7B033

L5 33UH IND SM 1812 180mA 7B033

L6 2U2H INDUCTOR 7D922

Q1 TRANS LF SS N SM BC847B 4A847

Q3 TRANS LF SS N SM BC847B 4A847

Q5 TRANS LF SS N SM BC847B 4A847

Q6 TRANS LF SS N SM BC847B 4A847

Q8 TRANS LF SS N SM BC847B 4A847

Q9 TRANS LF SS N SM BC847B 4A847

Q11 TRANS MOSFET SW ZVNL120A 4K120

R1 RESISTOR SM W4 1K0 2% 1A210

R2 RESISTOR SM W4 1K0 2% 1A210

R3 RESISTOR SM W4 1K0 2% 1A210

R4 RESISTOR SM W4 1K0 2% 1A210

R5 RESISTOR SM W4 1K0 2% 1A210

R6 RESISTOR SM W4 1K0 2% 1A210

R7 RESISTOR SM W4 1K0 2% 1A210

R8 RESISTOR SM W4 1K0 2% 1A210

R9 RESISTOR SM W4 2K2 2% 1A222

R10 RESISTOR SM W4 2K2 2% 1A222

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

R11 RESISTOR SM W4 2K2 2% 1A222

R12 RESISTOR SM W4 2K2 2% 1A222

R13 RESISTOR SM W4 2K2 2% 1A222

R14 RESISTOR SM W4 2K2 2% 1A222

R15 RESISTOR SM W4 2K2 2% 1A222

R16 RESISTOR SM W4 2K2 2% 1A222

R17 RES MF FU W3 10R 5% NFR25 1G010

R18 RESISTOR SM W4 10R 2% 1A010

R19 RESISTOR SM W4 47K 2% 1A347

R20 RESISTOR SM W4 47K 2% 1A347

R21 RES MF FU W3 100R 5% NFR25 1G110

R25 RESISTOR SM W4 0R0 2% 1A000

R34 RESISTOR SM W4 0R0 2% 1A000

R35 RESISTOR SM W4 100R 2% 1A110

R36 RESISTOR SM W4 100R 2% 1A110

R37 RESISTOR SM W4 100R 2% 1A110

R38 RESISTOR SM W4 100R 2% 1A110

R39 RESISTOR SM W4 220R 2% 1A122

R40 RESISTOR SM W4 100R 2% 1A110

R41 RESISTOR SM W4 220R 2% 1A122

R42 RESISTOR SM W4 0R0 2% 1A000

R43 RESISTOR SM W4 100R 2% 1A110

R44 RESISTOR SM W4 100R 2% 1A110

R45 RES MF W4 1K2 1% 1H212

R46 RES MF W4 1K2 1% 1H212

R47 RES MF W4 1K2 1% 1H212

R48 RES MF W4 1K2 1% 1H212

R49 RES MF W4 3K3 1% 1H233

R50 RES MF W4 3K3 1% 1H233

R51 RES MF W4 3K3 1% 1H233

R52 RES MF W4 3K3 1% 1H233

R53 RESISTOR SM W4 1K0 2% 1A210

R54 RESISTOR SM W4 1K0 2% 1A210

R55 RESISTOR SM W4 4K7 2% 1A247

R56 RESISTOR SM W4 11K 2% 1A311

R57 RESISTOR SM W4 11K 2% 1A311

R58 RESISTOR SM W4 18K 2% 1A318

R59 RESISTOR SM W4 18K 2% 1A318

R64 RESISTOR SM W4 47R 2% 1A047

R65 RESISTOR SM W4 47R 2% 1A047

R66 RESISTOR SM W4 100K 2% 1A410

R67 RESISTOR SM W4 470R 2% 1A147

R68 RESISTOR SM W4 10K 2% 1A310

R69 RESISTOR SM W4 10K 2% 1A310

R72 RESISTOR SM W4 100R 2% 1A110

R73 RESISTOR SM W4 100R 2% 1A110

R74 RESISTOR SM W4 100R 2% 1A110

R75 RESISTOR SM W4 100R 2% 1A110

R80 RESISTOR SM W4 2K2 2% 1A222

R81 RESISTOR SM W4 2K2 2% 1A222

R82 RESISTOR SM W4 680K 2% 1A468

R84 RESISTOR SM W4 680K 2% 1A468

R85 RESISTOR SM W4 680K 2% 1A468

R86 RESISTOR SM W4 0R0 2% 1A000

R91 RESISTOR SM W4 0R0 2% 1A000

R92 RESISTOR SM W4 0R0 2% 1A000

R94 RESISTOR SM W4 220R 2% 1A122

R95 RESISTOR SM W4 220R 2% 1A122

R96 RESISTOR SM W4 2K4 2% 1A224

R97 RESISTOR SM W4 2K4 2% 1A224

R98 RESISTOR SM W4 0R0 2% 1A000

R99 RESISTOR SM W4 0R0 2% 1A000

R102 RESISTOR SM W4 0R0 2% 1A000

R103 RESISTOR SM W4 0R0 2% 1A000

R104 RES MF W4 1K2 1% 1H212

R108 RESISTOR SM W4 100K 2% 1A410

R109 RESISTOR SM W4 100K 2% 1A410

R110 RESISTOR SM W4 100K 2% 1A410

R111 RESISTOR SM W4 100K 2% 1A410

R112 RESISTOR SM W4 680K 2% 1A468

R113 RESISTOR SM W4 680K 2% 1A468

R114 RESISTOR SM W4 100K 2% 1A410

R115 RESISTOR SM W4 0R0 2% 1A000

R117 RESISTOR SM W4 0R0 2% 1A000

RLY1 RELAY 960 OHM 51SB12T A205

SH1 PHONO EMC SHIELD E808MC

SK1 PHONO SKT 4-WAY EMC GOLD 8D225

SK203 32-WAY FFC CONN VERT 8K8032

SK204 23-WAY FFC CONN VERT 8K8023

X1 CRYSTAL 16.9344MHz PARALLEL 7X012

X1 GROMMET 8 I/D X 6.5 THK F021

Z1 IC OPAMP SM OP27 5B027S

Z2 IC OPAMP SM OP27 5B027S

Z3 IC AUDIO DUAL SM 4560D 5B4560M

Z4 IC AUDIO DUAL SM 4560D 5B4560M

Z5 IC VREG POS 78L05 5D78L05

Z7 IC HCMOS SM 74HC74 5K7474

Z8 IC HCMOS SM 74HC74 5K7474

Z11 IC VREG POS 78L05 5D78L05

Z12 IC CMOS SDECO DAC SM5864AP 5G5864

ALPHA 7/8/9 CD SERVICE MANUALALPHA 7/8/9 CD SERVICE MANUAL

Z13 IC HCMOS SM 74HCU04 5K7404

Z14 IC DIGITAL FILT SM5843APT 5G5843

Z16 IC VREG POS LM317T 5D317T

Z17 IC VREG POS LM337T 5D337

Z18 IC AUDIO DUAL SM 4560D 5B4560M

Alpha 7/8/9 CD Non PCB Parts, Metalwork etc.

Part No. Description

B3002 BATTERY AA

B2009 CDM14 MECHANISM

E802CH CHASSIS

E802CP ALPHA 7/8/9 CD/TUNER COVERPLATE

E802MI PCB INSULATOR

E806RP REAR PANEL

E810FP ALPHA 7/8 TUNER FASCIA

E813PM CD DRAWER FRONT

E815PM POWER BUTTON

E822PM FOOT

E823PM ALPHA 7 BADGE

E824PM ALPHA 8 BADGE

E825PM ALPHA 9 BADGE

HP006 SNAP RIVET (HOLDS MECH IN PLACE)

L801RC CR14 REMOTE CONTROL HANSET

L807CA FLEX FOILS MAIN BOARD TO DAC PCB

SH054 OWNERS HANDBOOK

SH058 WARRANTY LEAFLET

ALPHA 7/8/9 CD PLAYER MAIN PRINTED CIRCUIT BOARD LAYOUTALPHA 7/8/9 CD PLAYER MAIN PRINTED CIRCUIT BOARD LAYOUT

ALPHA 8 CD PLAYER DAC PRINTED CIRCUIT BOARD LAYOUT (underside view)ALPHA 8 CD PLAYER DAC PRINTED CIRCUIT BOARD LAYOUT (underside view)

ALPHA 8 CD PLAYER DAC PRINTED CIRCUIT BOARD LAYOUT (top view)ALPHA 8 CD PLAYER DAC PRINTED CIRCUIT BOARD LAYOUT (top view)

87654321

LK1

LINK10NP

D

C

LK11
LINK10NP
LK21
LINK10NP
LK31
LINK10NP
LK41
LINK10NP
LK51
LINK10NP
LK61
LINK10NP
LK71
LINK10NP
LK81
LINK10NP
LK91
LINK10NP

LK2
LINK10NP
LK12
LINK10NP
LK22
LINK10NP
LK32
LINK10NP
LK42
LINK10NP
LK52
LINK10NP
LK62
LINK10NP
LK72
LINK10NP
LK82
LINK10NP
LK92
LINK10NP

LK3
LINK10NP
LK13
LINK10NP
LK23
LINK10NP
LK33
LINK10NP
LK43
LINK10NP
LK53
LINK10NP
LK63
LINK10NP
LK73
LINK10NP
LK83
LINK10NP
LK93
LINK10NP

LK4
LINK10NP

LK24
LINK10NP
LK34
LINK10NP
LK44
LINK10NP
LK54
LINK10NP
LK64
LINK10NP
LK74
LINK10NP
LK84
LINK10NP
LK94
LINK10NP

LK5
LINK10NP
LK15
LINK10NP
LK25
LINK10NP
LK35
LINK10NP
LK45
LINK10NP
LK55
LINK10NP
LK65
LINK10NP
LK75
LINK10NP
LK85
LINK10NP
LK95
LINK10NP

LK6
LINK10NP
LK16
LINK10NP
LK26
LINK10NP
LK36
LINK10NP
LK46
LINK10NP
LK56
LINK10NP

LK76
LINK10NP
LK86
LINK10NP
LK96
LINK10NP

LK7
LINK10NP
LK17
LINK10NP
LK27
LINK10NP
LK37
LINK10NP
LK47
LINK10NP
LK57
LINK10NP
LK67
LINK10NP
LK77
LINK10NP
LK87
LINK10NP
LK97
LINK10NP

LK8
LINK10NP
LK18
LINK10NP
LK28
LINK10NP
LK38
LINK10NP
LK48
LINK10NP
LK58
LINK10NP
LK68
LINK10NP
LK78
LINK10NP
LK88
LINK10NP

LK9
LINK10NP
LK19
LINK10NP
LK29
LINK10NP
LK39
LINK10NP
LK49
LINK10NP
LK59
LINK10NP
LK69
LINK10NP
LK79
LINK10NP
LK89
LINK10NP

Links

LK10
LINK10NP
LK20
LINK10NP
LK30
LINK10NP
LK40
LINK10NP
LK50
LINK10NP
LK60
LINK10NP
LK70
LINK10NP
LK80
LINK10NP
LK90
LINK10NP

Power Supplies
L812C2_8.SCH

DAC & Audio outputs
L812C3_8.SCH

INOUT

LDIN

LDOUT

4MHZ

FILA
FILB

Microcontroller & Display
L812C4_8.SCH

INOUT
LDIN
LDOUT

4MHZ

FILA
FILB

DEEM
SMUTE
AMUTE

RMIN

PGML

CLK

DATA
SCOR
SQCK

XRST

LDON

XLT

SENSE

SUBQ

D

K0
K1
K0
K1

C

DD

Drilling

Detail

DRILL_DETAIL

B

A

1 2 3 4 5 6 7 8

TL1
TOOLING3.0

PAD1

VFD SUPPORT PAD

ACD_VFD_PAD

A2

Update Box

UPDATE_BOX

TL2
TOOLING4.1

Tooling Holes & Alignment Marks

PS

Photo Strip

PHOTO_STRIP

Documentation

TL3
TOOLING3.0

F4

T160MASP

Spare Fuse

TL4
TOOLING3.0

A1

BARCODE LABEL

BARCODE_A7CD

TL5
TOOLING3.0

A3

BARCODE_A8CD

FD_1

FIDUCIAL

BARCODE LABEL

FD_2

FIDUCIAL

23425

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

DRAWING TITLE

Alpha 7 CD Project Sheet

Circuit Diagram

1 4Sheet of

Filename

J:\FILES\PCBS\CIRCUITS\L812C1_8.PRJ

30-Oct-1997

CAH 96_1039
CAH 96_1104

CAH 24-4-97 UPGRADE IMPROVEMENTS97_1037 6
CAH 97_1069 2-9-97 HDCD LED changed

CAH 97_1101 30-10-97 HDCD LED removed from Alpha 7 CD

DRAWN BY CHK BY

ECO No.

DATE

C38 was 100U EL. LK14 removed & R64 added25 June 1996
LK66 removed & R65 added20 Nov 1996

L812CT 8

DESCRIPTION OF CHANGE

B

4

A

5

7

ISSUEDRAWING NO.

Spare fuseSpare fuseSpare fuseSpare fuse

D

C

B

100U EL

RIV1
HP007

LIVE NEUT

L3

1U0H RADIAL

L6

6U8H RADIAL

C41

RIV2
HP007 + C49

SK1

IEC2

NL

L2

1U0H RADIAL

F2

T250MA115V

115V units only

F1

T160MA

230V units only

FILB

FILB

FILA

FILA

P7V

+

C55

10N CD

L7

6U8H RADIAL

!

!

R51 22R FU

R52

NEUT2

115V

230V

!

!

22R FU

115V

230V

10

O/P 'Out'

10

SW201B
A1014

4

FILAC

11

9

1

2
7

6

4

5

10

9

SW201D

12

Vcc

8

5

T201

L811TX

A1014

Vcc

7

6

Z210

LB1641

LoadOut

6

16

17

ACAUD2

18

11

AC1

AC

AC2

13

ACDIG2

15
19

20

LoadIn

5

ACAUDG

ACAUD1

ACDIG1

ACDIG3

FILASW

Bias

4

C32

10N CD

87654321

SK204

GND

RB3

RB7

Vout

HS

RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7

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

9
8
7
6
5
4
3
2
1

FFC23V

O

TP2TP3 TP4

+ C42

100U EL

P5V

C54

10N CD

PD1
PAD300/4.1

D

C

B

D16

Vin

Vin

R64

!

1
2
3
4

L814CA

1N4003F

Vout

ADJ

A

+ C39

100U EL

+ C40

100U EL

A

ADJ

Vout

HS4TO220HS30REG

D15 1N4003F

P11V CLK

!

I

+ C51

1M0 25V

GND5VDAC

TP1

LK101B

LK101A

L814CA

O

O

Z207
LM317T

Vin

1
2
3
4

R39
220R MF

R47
3K0 MF

R46
3K0 MF

R40
220R MF

A

P5V

HDCD

TP6

D14

1N4003F

Vout

ADJ

+ C38

10U EL

REMIN

HDCD

TP5

+ C50

P18V

100U EL

100U EL

N18V

O

RA0

P18V

N18V

R43
330R MF

R42
1K0 MF

RA0
AMUTE
DEEM

RMIN
XRST

4MHZ

AC1

AC

AC2

DAC Supply
+5V

P5V

R27

R50

100K MF

R54

330R MF

R59
330R MF

D22

1N4003F

D23

1N4003F

P5VDAC

C46
10U NP

100K MF

P11V

17
18

1
2

3
4

!

R37 10R FU

!

Z211
PIC16C54XT

RA0
RA1
RA2
RA3

RTCC
MCLR

OSC1

16

R48

10R FU

+

1M0 25V

OSC2

15

+ C56

C33

RLYV

10U EL

5

TO220HS08REG

RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7

VSS

14

VDD

P22VUN

!

R44 3R3 FU

1M0 25V

!

3R3 FU

O

R53

33K MF

D18
7V5 400MW

N30V

GND

1

C47
1M0 25V

N22VUN

P11V

CDM14 Supply
+7.3V

R38
330R MF

R41
1K6 MF

TP7

3

+5V

O/P

Case

C44

C45
1M0 25V

Z206 LM317T

I

GNDREM

1M0 25V

Vin

O

AGND

D4

UF4003
D6

UF4003

D8

UF4003
D10

UF4003

DGND

D12
1N4003F

!

R58 10R FU

GND

O/P 'In'

1

2

3

D5

UF4003
D7

UF4003

D9

UF4003
D11

UF4003

+

C34

100U EL 100V

N35V

SW201C
A1014

+

C36
3M3 EL

I

Vin

Z209
7915

HDCDREM

LED201

LED ULTRARED

Alpha 8 only

9
8
7

P11VSW

TO220HS30REG

D17
15V 400MW

G

GND

HS1

Vout

+

+

R45

D13

1N4003F

Vout

ADJ

A

+ C37

10U EL

C35

100U EL 100V

+

N30V

RX201

SBX1610-52

C52
10N CD

Z204
LM317T

I

HS3
TO220HS30REG

+

+C48

Z205
LM337T

I

R65 10R FU

P7V P5VP5V DAC

10R FU

P7V

+

C43

1M0 25V

P5VREM

REMOUT

2

I

HS2A

+

P5V DAC

Vin

6

RB0
7
8
9
10

RB4
11
12
13

P5V

C53

22U EL OS

P18V

N18V

P5V

P11V

Power connector to DAC PCB

Z208 7805

G

RB1

RB2

RB5

RB6

LDOUT

A

1 2 3 4 5 6 7 8

LDIN

INOUT

R55

1K2 MF

OUTSW

D19

LOADOUT

LOADININSW

4V7 400MW

SK205
8K2005

1
2

LOADOUT

3

LOADIN

4

GND

5

INSW
OUTSW

Motor Ground

23425

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

DRAWING TITLE

Alpha 7/8/9 CD Players

Circuit Diagram

2 4Sheet of

Filename

J:\FILES\PCBS\CIRCUITS\L812C2_8.SCH

30-Oct-1997

CAH 96_1039
CAH 96_1104

CAH 24-4-97 UPGRADE IMPROVEMENTS97_1037 6
CAH 97_1069 2-9-97 HDCD LED changed

CAH 97_1101 30-10-97 HDCD LED removed from Alpha 7 CD

DRAWN BY CHK BY

ECO No.

DATE

C38 was 100U EL. LK14 removed & R64 added25 June 1996
LK66 removed & R65 added20 Nov 1996

L812CT 8

DESCRIPTION OF CHANGE

4

A

5

7

ISSUEDRAWING NO.

87654321

Alpha 7 CD Configuration Plug

SK2

1 2
3 4
5 6
7 8

9 10
11 12
13 14

D

15 16

DIL16 HSKT

D

Flex connector from CDM14 mech

SK201

ADATA

FFC23V

P11V CLK

23

SUBQ

22

SENSE

21

XLT

20

LDON

19
18

P5V

17
16

DIGOUT

15
14

XRST

13

AMUTE

12

SQCK

11

SCOR

10

DATA

9

CLK

8

BCLK

7

ADATA

6

LRCK

5

WDCK

4
3
2
1

17MHZ

WDCK 17MHZ

LRCK

ADATA

BCLK

R49

120R MF

Z202A 74HCU04

Z202B 74HCU04

Z202C 74HCU04

1 2 3 4 5 6 7 8

SCLK

FOK
GFS

C

BCLK

LRCK

P7V

B

A

TP10

SMUTE
XRST

TP8

TP9

12

34

56

WD

R16

P5V DAC

LRCK
ADATA
BCLK

I

+ C26

100U EL

L4

33UH AX

330R MF

Z203
78L05

Vin

C12

10N CD

P5V DAC(A7)

PL1

DIL16 VPLG

GND

G

P5V DAC(A7)

R23
120R

C24

100U EL

+

12
34
56
78
910
1112
1314
1516

Vout

C25

22U EL OS

O

17MHZ

P5VCLK

+

A7DAC5V

PGML

CLK

DATA

R31 330R MF

R32 330R MF

C28
1N0 PP

R62

330R MF

TP14

74HCU04

7

R33 330R MF

18

19

20

21

22

23

24

25

26

27

28

Vdd

CKSL

MUTE

MD/DM1

TP11

Z202F

74HCU04

X1

C13

33P CD

MODE

Z201

PCM1710U

R25

120R MF

Z202D

8 9

74HCU04

1213

ML/DSD

MC/DM2

LRCIN1DIN2BCKIN3CLKO4XTI5XTO6DGND7Vdd8Vcc2R9AGND2R10EXT1R11EXT2R12VOUTR13AGND

17MHz

14

Z202G

16.9344MHZ

DGND

C11

680P PP

Analogue ground

R19

33K MF

R18
33K MF

Vcc2L

AGND2L

R57
330R MF

100P CD

C15

100P CD

C16

!

R24

10R FU

C23

+

100U EL

15

16

17

EXT2L

EXT1L

VOUTL

14

+

C22
100U EL

10 11

Z202E 74HCU04

R35

4M7 MF

10N CD

BC547B

R21

470R MF

12345678910111213141516171819202122232425262728293031

SK203
FFC32V

L5
33UH AX

VOUTL

Vcc

C20
680P PP

DACGND

R56

330R MF

C17

Q2

C10

1N0 CD

23425

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

HDCD

C21
10U NP

NOT FITTED

D21
1N4148

RB3

RB2

PMUTE

R2
3K9 MF

C1
NOT FITTED

AUDGND

R102
3K9 MF

VOUTR

C101

P5V

R17
10K MF

22R MF

XRST

+ C29

100U EL

DEEM

SMUTE

RA0

RB7

RB6

RB5

RB4

RB0

RB1

Data connector to DAC PCB

R4

D1
1N4148

SW201A
A1014

R28
10K MF

3K9 MF

R5
10K MF

R104
3K9 MF

R105
10K MF

PMUTE

3
2

3
2

PMUTE

10K MF

680P PP

R3

3K9 MF

C3

680P PP

680P PP

R103

3K9 MF

C103

680P PP

R20

C2

C102

1
2
3

DRAWING TITLE

Alpha 7,8 & 9 CD Players

Circuit Diagram

3 4Sheet of

Filename

J:\FILES\PCBS\CIRCUITS\L812C3_8.SCH

DIGOUT

R34

BC547B

Q6

WD

AMUTE

XRST

Z1A

NJM2114

1

Z101A

NJM2114

1

Analogue Ground

P5V

Q5

BC547B

30-Oct-1997

LRCK

DIGOUT

17MHZ

ADATA

BCLK

32

LEFT1

R6
10K MF

R7

33K MF

5
6

R8
3K9 MF

DIGOUT

R9
3K9 MF

Z1B

NJM2114

C4

7

10U NP

Analogue Ground

R109
3K9 MF

RIGHT1

R106
10K MF

R107

33K MF

R30

10K MF

D3

1N4148

1N4148

D2

5
6

R108
3K9 MF

R14
10K MF

Q4
BC547B

CAH 96_1039
CAH 96_1104

CAH 24-4-97 UPGRADE IMPROVEMENTS97_1037 6
CAH 97_1069 2-9-97 HDCD LED changed

Z101B

NJM2114

R29

1K0 MF

R15
10K MF

Q3
BC557B

P18V

7

N18V

C104

10U NP

R110

22K MF

C27

10U EL

R26

100K MF

+

R10
22K MF

R22
220R MF

C14
33P CD

R11

120R MF

R111

120R MF

D20

4V7 400MW

TP13

R13
10K MF

R113
10K MF

Mute

C38 was 100U EL. LK14 removed & R64 added25 June 1996
LK66 removed & R65 added20 Nov 1996

R36
620R MF

R12
22R MF

Q1
BC547B

R112
22R MF

Q101
BC547B

84

DIGOUT_TX

T202

1

DIGOUTP

5

2

4

3

C18 10N CD

LOUT

P18V C6

Z1C

NJM2114

N18V

SCRN

ROUT

L1

7F003

L

R

DIGOUTN

SK4 PHONO2H

1

84

C5

100P PP

CAH 97_1101 30-10-97 HDCD LED removed from Alpha 7 CD

DRAWN BY CHK BY

ECO No.

DATE

DESCRIPTION OF CHANGE

SK5
PHONO1

EMC

C19
10N CD

EMC

C105
100P PP

GNDOUT

680P PP

Z101C
NJM2114

C7

680P PP

L812CT 8

EMCPHONO2

SH1

4
5

7

ISSUEDRAWING NO.

C

B

A

87654321

32

30
40
50
60
70
80

LDOUT

SCOR

P5V

29

30

31

65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

RMIN

Flexfoil connector to Display PCB

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

P1P3P4

30
40
50
60
70
80

-30v
+5V
+5V
+5V
+5V
LOADIN
LOADOUT
SCOR
SEL2
SEL1

P6

P5

P8P9P10

P7

PGML

P2

20

10

TIMER1RMIN2+5V3NC4NC5M/C6POML7CLK8SENSE9DATA10SQCK11SUBQ12NC13AMUTE14LDON15XLT16NC17R1118R1219R1320R1421KEY022KEY123KEY2

P15
57NC58NC59NC60NC61NC6210632064

CLK

P13

P14

DATA

SENSE

P12

P11

P11

P12

SUBQ

SQCK

P13

P10

P1052P1153P1254P1355P1456P15

P14

P1520405060

10

30

P5

P6

P7

P8

P9

R294 1K0 MF

XLT

LDON

AMUTE

R295

10K MF

123456789

70

80

D

P1

P2

P3

P4

42P143P244P345P446P547P648P749P850P951

Z212

CXP826P16Q

NC41NC

SMUTE

DEEM

RO4
RO3
RO2
RO1
VSS

XTAL

EXTAL

IN/OUTSW

AF ADJ

KEY3

24

K1M

K0M

R298

10K MF

NC

RST

+5V
+5V

R60

8K2 MF

R11
R12
R13
R14

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

K1
K0

R4
R3
R2
R1

R61
8K2 MF

R292
8K2 MF

R293 8K2 MF

SMUTE
DEEM

X201
CST4.00

C294
47N CD

4MHZ
XRST
INOUT

R1

R2

R3

R4

R11

D291

C0' C1' C3'

1N4148

D294

C4'

1N4148

D295

C0

1N4148

R12

D292

1N4148

D293

1N4148

D296

1N4148

D297

1N4148

R13

R14

C

C2

C7

SK291
FFC32V

FILA FILB

INOUT

D

C

LDIN

LDOUT

DEEM
SMUTE
AMUTE

4MHZ

RMIN

PGML

CLK

DATA

SCOR

SQCK

XRST

LDON

XLT

SENSE

SUBQ

SMUTE

DEEM

R63
33K MF

4MHZ

RMIN

PGML CLK DATA

INOUT
LDIN
LDOUT

DEEM

TP12

DEEM
SMUTE
AMUTE

AMUTE

4MHZ

RMIN

PGML
CLK
DATA

SCOR
SQCK
XRST

LDON
XLT
SENSE
SUBQ

P5V

!

R291 3R3 FU

C291

47N CD

N30V

K1
K0

C292

100U EL

+

C293

47N CD

LDIN

R296

R297

10K MF

10K MF

B

DISP301

B1008

R308

NEXT PLAY

SW301 SW302 SW303 SW304 SW305 SW306 SW307 SW308

NEXT PREV FF FR PAUSE STOP PLAY OPEN

A

1 2 3 4 5 6 7 8

PREV FF FR PAUSE STOP

R301
33K MF

R302
12K MF

R303
5K6 MF

SW309 SW310 SW311 SW312

CHECK PROGRAM DISPLAY REPEAT

R304
3K3 MF

CHECK PROG DISP REPEAT

R309
3K3 MF

R305
2K2 MF

R310
2K2 MF

R306
1K5 MF

R311
1K5 MF

R307
1K2 MF

R312
1K2 MF

8K2 MF

OPEN

R313
8K2 MF

K0

SK301
FFC32H

K1

23425

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

> ||
DISC
SHUFFLE

VF1VF

P155P146P13

2

3804

7

8

D80

DP13

DP14

DP15

VF2

D80

D70

D60

D50

27

28

29

30

31

32

DRAWING TITLE

Alpha 7,8 & 9 CD Players

Display PCB

Circuit Diagram

4 4Sheet of

Filename

J:\FILES\PCBS\CIRCUITS\L812C4_8.SCH

88

P1297010P11116012P1013P9145015P8164017P718P6

D70

D60

D50

D40

DP7

DP8

DP9

DP10

DP11

DP12

D40

D30

D20

26

24

25

D10

DP15
22

23

30-Oct-1997

DP13

DP14

20

21

DP11

DP12

18

19

DP10
17

-88.8888

DIS5V

VF30VF

19

20P5213022P4232024P325P2261027P128

D30

D20

DP4

DP5

DP6

DP5

DP6

DP7

DP8

DP9

12

13

14

15

16

CAH 96_1039
CAH 96_1104

CAH 24-4-97 UPGRADE IMPROVEMENTS97_1037 6
CAH 97_1069 2-9-97 HDCD LED changed

CAH 97_1101 30-10-97 HDCD LED removed from Alpha 7 CD

DRAWN BY CHK BY

DP3

DP4

DP2

DP3

D10

DP2

DP1

DP1

29

31

VF1

1234567891011

DISGND

C38 was 100U EL. LK14 removed & R64 added25 June 1996
LK66 removed & R65 added20 Nov 1996

R314
220R MF

L812CT 8

ECO No.

DATE

DESCRIPTION OF CHANGE

LED301
LED GREEN

B

4

A

5

7

ISSUEDRAWING NO.