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ALPHA 7/8/9 CD SERVICE MANUAL
Arcam Alpha 7/8/9 CD Service Manual DAC & Audio Outputs (Alpha 7 only)
The DAC is a Delta-Sigma design from Burr Brown,
Issue 1 Serial No. 0001 - (Paul Newton July 96)
the PCM1710U.
The serial digital data from the decoder Z206 is input
Circuit Description
to pins 1 to 3. The system clock is input to pin 5.
The following notes describe the operation of the
The DAC is powered entirely from one 5V supply,
Alpha 7/8/9 CD players. They include the circuitry on
although it is split and decoupled between the
the main, DAC and display PCBs but not that on the
analogue and digital sections of the device.
servo PCB attached to the mechanism.
The analogue outputs from each channel are
Power Supplies
processed identically.Three poles of filtering are
provided by the active filter based around Z1-A. Z1-B
The mains input is fitted with inductors L2,3,6,7 to
buffers the audio output and sets the output level.
filter electromagnetic interference coming out of the
player.
Muting is provided by turning on Q1 and Q101.
Mains transformer T201 has three secondary
windings supplying two separate power supplies and
DAC & Audio Outputs (Alpha 8 only)
an AC supply for the display filament:
This is a similar circuit as the one used on the Arcam
Analogue Supply
Alpha 6 DAC PCB but designed for Sony format
input data and a better digital filter, the SM5843AP1,
Bridge rectifier D4,5,6,7 and reservoir capacitors
Z14.The digital filter is used with a SM5864AP 20-bit
C209-C212 produce unregulated split rails of about
DAC chip, Z12, (described here as a PWM noise
+/-22V.
shaper to avoid confusion with the 1-bit DAC Latch
Z204 and Z205 provide regulated outputs of +18V
which follows it). The output from this is re-latched by
and -18V respectively that power the opamps in the
Z7, Z8.
audio output stage.
Digital FilterA PIC micro on the mother board
Since there is no power switch on this secondary, the
controls the filter with the signals RB0 to RB7. The
analogue supplies are always connected.
SM5843 filter has internal pull-up resistors on its
inputs resulting in RB4 & RB5 being logic 1.
Digital Supply
The SM5843APT requires several control lines from
Switch SW201-A disconnects the digital secondary
the PIC...
winding when the 'Power' switch is out.
RB7 FSEL2, Selects sampling rate for de-emphasis.
An unregulated supply of about 11V is produced by Static low for 44.1K.
the bridge rectifier D8,9,10,11 and reservoir RB6 FSEL1, Selects sampling rate for de-emphasis.
capacitor C36. Static low for 44.1K.
This is then regulated to provide three +5 volt RB5 IW2N, Selects input word length. Static high for
supplies (Z208 general logic supply, Z207 DAC 16 bits.
supply, Z203 system clock generator supply) and a RB4 MDT, Serial data input for volume control. Burst
+7.3v supply for themechanism and motor drive at switch-on for setting to full.
circuits(Z206). RB3 RSTN, Reset line. Short pulse low at switch on,
then static high.
A -30v supply is formed by Z209 and associated RB2 MLEN, Serial data latch input for volume
components to power the display grid. control.
RB1 MCK, Serial clock input for volume control.
Muting RB0 Not connected.
When the unit is turned off SW201-A discharges
capacitor C29 quickly. This along with the AMUTE No Dither On Silence
signal from the microprocessor, controls the output The digital filter adds `dither' to the output signal.
mute transistors Q1,101 via level shifter Q3. This improves the low-level performance of the DAC.
The PWM filter normally mutes when it detects
Clock Generator digital silence to prevent any unwanted noise and
idle-tones on the audio outputs when no music is
The system clock is generated by a discrete oscillator playing. A slight click is audible when this happens.
based around Q2 and 16.9344MHz oscillator X1. The Unfortunately, the added dither prevents this mute
output of Q2 is amplified and buffered by inverters from operating because it holds it open. Q11 detects
Z202-E & D and sent to the clock input of the DAC digital silence on the data input to the filter. When
Z201. silence is detected, the dither function is switched off
ALPHA 7/8/9 CD SERVICE MANUAL
allowing the PWM filter's mute to operate as normal. latches, Z7 and Z8.The power supply for these chips
is the DAC voltage reference and the output drives
Mute Relay the analogue filter stage directly. The latches reduce
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 any edge-timing jitter induced on the PWM signal
the CD player comes out of standby mode and goes coming from Z12.
high after a short settling delay.
The power rail, RLYPWR, is un-regulated and has a Analogue filter
small reservoir capacitor (on the mother board) so The first half of the analogue filter, Z3 and Z4 is
that the relay is released very soon after the mains is balanced. The signal through one side of the op-amp,
disconnected from the CD player before the other pin 1, should be phase inverted with respect to the
power supply rails collapse. other, pin 7. These signals should be viewed on a
scope through a 100K resistor since there may still
PWM noise shaper be quite a lot of RF noise on the signal.
To reduce EMC, the clock signal going into this chip, Z1 and Z2 filter the audio signal further and also
Z12, is very weak on the XTI pin (23) pin, taken convert the balanced signal into a single ended
directly off Q5. This is amplified so that there should signal. Z18 acts as a DC servo to reduce the output
be a larger signal on the CKO pin (26). offset voltage. This has a very large time constant so
The PWM output on pins 11, 13, 16 and 18 can be an offset as high as 50mV is possible when the unit
resolved into an audio waveform on a scope simply is first plugged in. This reduces to less than 3mV
by measuring them through a 100K resistor. The after 10 minutes and stays low if the unit is switched
same is true for the PWM signals through the latch off and on with the Standby button.
and the level shifter.
Latch
The PWM data from Z12 is re-latched using 74HC74
SM5843AP1
Sony Format Digital SM5864PWM
Digital Filter,
Audio Z14 Noise Shaper, Z12
74HC74
Analogue Filter,
Latches, Audio out
Control from PIC micro Z1, Z2, Z3, Z4
(Z211) on main pcb Z7 & Z8
16.9344MHz Low-Jitter
Clock
System Clock, X1, Q5 & Z13
Block Diagram of Alpha 8 DAC PCB
ALPHA 7/8/9 CD SERVICE MANUAL
Test Points Marked on Circuit Diagram Only
Test Points Measurement Information
17MHz Clock Output to mother board. 16.9344MHz +/- 40ppm, 4V to 5V peak to peak square wave.
AGND Analogue ground point.
AMUTE Digital audio mute input on SK203. 0V=off, 5V=Mute.
CK Serial Data clock input on SK203. Sony format.
DA Serial Data data input on SK203. Sony format.
CLKSYNC Crystal clock override. A 16.9344MHz HCMOS clock can be injected from an external source.
DEEM De-emphasis select input on SK203. 0V=off, 5V=On.
DGND Digital ground point.
LOUT Left channel audio output at SK1. Measure d.c. offset at switch-on and after 1 minute, see specifications.
LR Serial Data LR input on SK203. Sony format.
MUTERLY Mute Relay Voltage. Equal to RLYPWR voltage when output is muted and 0V d.c. +0.5V,-0.0V when
output is un-muted.
N15 Regulated analogue supply. -15V d.c. +/- 0.6V.
N18V -18.45V d.c. +/- 0.5V supply input on SK204 for analogue.
P5V(0) +5V d.c. +/- 0.3V digital filter supply input on SK204.
P5V(1) +5V d.c. +/- 0.3V PWM noise shaper supply input on SK204.
P5VCLK Regulated clock supply. +5V d.c. +/- 0.3V.
P15 Regulated analogue supply. +15V d.c. +/- 0.6V.
P18V(0) +18.45V d.c. +/- 0.5V supply input on SK204 for analogue.
P18V(1) +18.45V d.c. +/- 0.5V supply input on SK204 for clock and latch.
PWRGND Power ground point. Used by mute relay only.
RA0 Mute relay control from PIC micro on SK203.
RB0-RB7 Control lines from PIC micro on SK203.
REFL DAC reference voltage, left channel. +5V +/- 0.3V.
REFR DAC reference voltage, right channel.
RLYPWR +12V d.c. +/- 1V supply input for mute relay on SK204.
ROUT Right channel audio output at SK1. Measure d.c. offset at switch-on and after 1 minute, see
specifications.
SRVL Left d.c. servo voltage. -10 to +10V d.c.
SRVR Right d.c. servo voltage.
SYSCLK Clock used by latches. 4V to 5V peak to peak square wave at 16.9344MHz.
ALPHA 7/8/9 CD SERVICE MANUAL
Disc Transport Module 3. Unplug the unit from the mains.
4. Push the tray front upwards to remove it
The CDM 14 module comprises the disc loading from the tray. Push the tray in manually.
mechanism, laser assembly, RF amplifier and 5. Remove the 4 screws holding the front panel
analogue signal processing. All the servo control and to the chassis and release the locating tabs.
motor drive circuits are also included. 6. Unplug the flexfoil from the display board
where it enters the main pcb.
7. Remove the 2 screws holding the remote
Digital Signal Processor receiver pcb in place.
8. The front panel can now be pulled off the
Mute, attenuation and de-emphasis functions are unit.
controlled via a three-wire serial bus from the system 9. To remove the display pcb remove the 6
controller (Z212) to pins 26, 27 & 28 of the DAC screws holding the board in place.
(Z201).
To remove the main pcb first remove the DAC board
Digital audio is input to the DAC on pins 1, 2& 3 in if it is an Alpha 8 or 9 CD player.
standard Sony format i.e. Word Clock, Data and Bit
Clock. 1. Remove the 3 screws holding the audio
output sockets to the rear panel and 2
A digital output complying to the SPDIF standard is screws holding the aluminium extrusion in
generated by the decoder on the mechanisim place.
assembly. This is passed through an isolating 2. Squeeze the tops of the 2 pcb pillars and lift
transformer, T202, to the digital output socket SK5. the board up slightly to clear them .
3. Remove the 2 flexfoils from the DAC board.
System Controller The DAC board, still attached to the extrusion, can
now be removed from the unit.
The CXP826P16Q system controller (Z212) is a
combined CD player controller, keyboard scanner, To remove the main pcb remove the 8 pcb securing
remote control decoder and fluorescent display screws and the screw holding the digital ouput socket
driver. It's clock is generated by 4.00MHz resonator to the chassis. (On Alpha 7 CDs also remove the 3
X201. screws securing the audio ouput sockets in place).
Release the cables which connect the mechanism to
The controller detects the position of the disc drawer the main board.
from the status of two microswitches, INSW &
OUTSW, on socket SK205. The drawer motor is The main pcb can now be slid out of the case.
controlled via motor driver Z210
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 MANUAL
Alpha 7/8/9 Main PCB Parts List Alpha 7/8/9 Main PCB Parts List
Ref. No. Description Part No. Ref. No. Description Part No.
C2 PPRO 680P 63V 5% RA 2D168 C49 ELST 10U 50V 2N610
C3 PPRO 680P 63V 5% RA 2D168 C50 ELST 10U 50V 2N610
C4 ELST NON POLAR 10UF 35V 2U610 C51 ELST 1M0 25V 2N810
C5 PPRO 100P 63V 5% RA 2D110N C52 CERD 10N 100V 20% 2A310
C6 PPRO 680P 63V 5% RA 2D168 C53 ELST 22U 20V OSCON 2P622
C7 PPRO 680P 63V 5% RA 2D168 C54 CERD 10N 100V 20% 2A310
C10 CERD 1N0 63V 2A210 C55 CERD 10N 100V 20% 2A310
C11 CERD 10N 100V 20% 2A310 C56 ELST 10U 50V 2N610
C12 CERD 10N 100V 20% 2A310 C102 PPRO 680P 63V 5% RA 2D168
C13 CERD 33P 63V 2A033 C103 PPRO 680P 63V 5% RA 2D168
C14 CERD 33P 63V 2A033 C104 ELST NON POLAR 10UF 35V 2U610
C15 CERD 100P 63V 2A110 C105 PPRO 100P 63V 5% RA 2D110N
C16 CERD 100P 63V 2A110 C291 CERD 47N 63V 10% 2A347
C17 CERD 10N 100V 20% 2A310 C292 ELST 100U 25V 2N710
C18 CERD 10N 100V 20% 2A310 C293 CERD 47N 63V 10% 2A347
C19 CERD 10N 100V 20% 2A310 C294 CERD 47N 63V 10% 2A347
C20 PPRO 680P 63V 5% RA 2D168 D1 SSDIODE 1N4148 75V 3A4148
C21 ELST NON POLAR 10UF 35V 2U610 D2 SSDIODE 1N4148 75V 3A4148
C22 ELST 100U 25V 2N710 D3 SSDIODE 1N4148 75V 3A4148
C23 ELST 100U 25V 2N710 D4 RECTIFIER 1N4003F 1A 200V 3B4003
C24 ELST 100U 25V 2N710 D5 RECTIFIER 1N4003F 1A 200V 3B4003
C25 ELST 22U 20V OSCON 2P622 D6 RECTIFIER 1N4003F 1A 200V 3B4003
C26 ELST 100U 25V 2N710 D7 RECTIFIER 1N4003F 1A 200V 3B4003
C27 ELST 10U 50V 2N610 D8 RECTIFIER 1N4003F 1A 200V 3B4003
C28 CERD 470P 63V 2A147 D9 RECTIFIER 1N4003F 1A 200V 3B4003
C29 ELST 100U 25V 2N710 D10 RECTIFIER 1N4003F 1A 200V 3B4003
C32 CERD 10N 100V 20% 2A310 D11 RECTIFIER 1N4003F 1A 200V 3B4003
C33 ELST 1M0 25V 2N810 D12 RECTIFIER 1N4003F 1A 200V 3B4003
C34 ELST 100U 100V 2N710B D13 RECTIFIER 1N4003F 1A 200V 3B4003
C35 ELST 100U 100V 2N710B D14 RECTIFIER 1N4003F 1A 200V 3B4003
C36 ELST 3M3 25V 2N833 D15 RECTIFIER 1N4003F 1A 200V 3B4003
C37 ELST 10U 50V 2N610 D16 RECTIFIER 1N4003F 1A 200V 3B4003
C38 ELST 10U 50V 2N610 D17 ZENER 15V 400MW 3C11504
C39 ELST 100U 25V 2N710 D18 ZENER 7V5 400MW 3C07504
C40 ELST 100U 25V 2N710 D19 ZENER 4V7 400MW 3C04704
C41 ELST 100U 25V 2N710 D20 ZENER 4V7 400MW 3C04704
C42 ELST 100U 25V 2N710 D21 SSDIODE 1N4148 75V 3A4148
C43 ELST 1M0 25V 2N810 D22 RECTIFIER 1N4003F 1A 200V 3B4003
C44 ELST 1M0 25V 2N810 D23 RECTIFIER 1N4003F 1A 200V 3B4003
C45 ELST 1M0 25V 2N810 D291 SSDIODE 1N4148 75V 3A4148
C46 ELST NON POLAR 10UF 35V 2U610 D292 SSDIODE 1N4148 75V 3A4148
C47 ELST 1M0 25V 2N810 D293 SSDIODE 1N4148 75V 3A4148
C48 ELST 1M0 25V 2N810 D294 SSDIODE 1N4148 75V 3A4148
ALPHA 7/8/9 CD SERVICE MANUAL
D295 SSDIODE 1N4148 75V 3A4148 R14 RES MF W4 1% 10K 1H310
D296 SSDIODE 1N4148 75V 3A4148 R15 RES MF W4 1% 10K 1H310
D297 SSDIODE 1N4148 75V 3A4148 R16 RES MF W4 330R 1% 1H133
DISP301 DISPLAY ALPHA 7/8/9 (SONY) B1008 R17 RES MF W4 1% 10K 1H310
F1 INS COVER PCB FUSEHOLDER F022 R18 RES MF W4 1% 33K 1H333
F1 FUSE 20mm 160mA T C11166 R19 RES MF W4 1% 33K 1H333
F1 / FUSEHOLDER 20mm PCB 8S004 R20 RES MF W4 22R 1% 1H022
F2 / FUSEHOLDER 20mm PCB 8S004 R21 RES MF W4 470R 1% 1H147
F2 INS COVER PCB FUSEHOLDER F022 R22 RES MF W4 1% 220R 1H122
F4 FUSE 20mm 160mA T C11166 R23 RES MF W4 120R 1% 1H112
F4 SPARE FUSEHOLDER F062 R24 RES MF FU W3 5% 10R NFR25 1G010
HS1 HEATSINK TO220 CLIP 30 F007 R25 RES MF W4 120R 1% 1H112
HS2 HEATSINK TO220 8.6 DEGC/W F008 R26 RES MF W4 100K 1% 1H410
HS2 HEATSINK CLIP TO220 13/8.6 DC/W F006 R27 RES MF W4 100K 1% 1H410
L1 FERRITE BEAD SINGLE AXIAL TAPED 2K BOX 7F003 R28 RES MF W4 1% 10K 1H310
L2 INDUCT 1R0 283AS-1R0K 34-10914 7D001 R29 RES MF W4 1% 1K0 1H210
L3 INDUCT 1R0 283AS-1R0K 34-10914 7D001 R30 RES MF W4 1% 10K 1H310
L4 33UH IND 34-48330 7D033 R31 RES MF W4 330R 1% 1H133
L5 33UH IND 34-48330 7D033 R32 RES MF W4 330R 1% 1H133
L6 6U8H INDUCTOR 7D968A R33 RES MF W4 330R 1% 1H133
L7 6U8H INDUCTOR 7D968A R34 RES MF W4 1% 10K 1H310
LED201 LED RED 5MM 3D5119 R35 RES MF W4 4M7 1% 1H547
LED301 LED GREEN 5MM 3D001 R36 RES MF W4 1% 620R 1H162
LK101A JUMPER 4-WAY LEAD L814CA R37 RES MF FU W3 5% 10R NFR25 1G010
PAD1 Alpha 7/8/9 CD SUPPORT PAD E805AP R38 RES MF W4 330R 1% 1H133
PL1 16 WAY DIL PIN HEADER 8K6316 R39 RES MF W4 1% 220R 1H122
Q1 TRANS LF SS N BC547B 4A547 R40 RES MF W4 1% 220R 1H122
Q2 TRANS LF SS N BC547B 4A547 R41 RES MF W4 1K6 1% 1H216
Q3 TRANS LF SS P BC557B 4A557 R42 RES MF W4 1% 1K0 1H210
Q4 TRANS LF SS N BC547B 4A547 R43 RES MF W4 330R 1% 1H133
Q5 TRANS LF SS N BC547B 4A547 R44 RES MF FU W3 5% 3R3 NFR25 1G833
Q6 TRANS LF SS N BC547B 4A547 R45 RES MF FU W3 5% 3R3 NFR25 1G833
Q101 TRANS LF SS N BC547B 4A547 R46 RES MF W4 3K0 1% 1H230
R2 RES MF W4 3K9 1% 1H239 R47 RES MF W4 3K0 1% 1H230
R3 RES MF W4 3K9 1% 1H239 R48 RES MF FU W3 5% 10R NFR25 1G010
R4 RES MF W4 3K9 1% 1H239 R49 RES MF W4 120R 1% 1H112
R5 RES MF W4 1% 10K 1H310 R50 RES MF W4 100K 1% 1H410
R6 RES MF W4 1% 10K 1H310 R51 RES MF FU W3 22R 5% NFR25 1G022
R7 RES MF W4 1% 33K 1H333 R52 RES MF FU W3 22R 5% NFR25 1G022
R8 RES MF W4 3K9 1% 1H239 R53 RES MF W4 1% 33K 1H333
R9 RES MF W4 3K9 1% 1H239 R54 RES MF W4 330R 1% 1H133
R10 RES MF W4 22K 1% 1H322 R55 RES MF W4 1% 680R 1H168
R11 RES MF W4 120R 1% 1H112 R56 RES MF W4 330R 1% 1H133
R12 RES MF W4 22R 1% 1H022 R57 RES MF W4 330R 1% 1H133
R13 RES MF W4 1% 10K 1H310 R58 RES MF FU W3 5% 10R NFR25 1G010
ALPHA 7/8/9 CD SERVICE MANUAL
R59 RES MF W4 330R 1% 1H133 SK5 PHONO SKT SINGLE EMC 8D220
R60 RES MF W4 1% 8K2 1H282 SK201 23-WAY FFC CONN VERT 8K8023
R61 RES MF W4 1% 8K2 1H282 SK203 32-WAY FFC CONN VERT 8K8032
R62 RES MF W4 330R 1% 1H133 SK204 23-WAY FFC CONN VERT 8K8023
R63 RES MF W4 1% 33K 1H333 SK205 5-WAY AMP CT CONN 8K2005
R64 RES MF FU W3 5% 10R NFR25 1G010 SK291 32-WAY FFC CONN VERT 8K8032
R102 RES MF W4 3K9 1% 1H239 SK301 32-WAY FFC CONN HORIZ 8K8132
R103 RES MF W4 3K9 1% 1H239 SW201 SW PUSH 4PCO A1014
R104 RES MF W4 3K9 1% 1H239 SW301 TACT SWITCH 2-PIN LOW PROF A1504
R105 RES MF W4 1% 10K 1H310 SW302 TACT SWITCH 2-PIN LOW PROF A1504
R106 RES MF W4 1% 10K 1H310 SW303 TACT SWITCH 2-PIN LOW PROF A1504
R107 RES MF W4 1% 33K 1H333 SW304 TACT SWITCH 2-PIN LOW PROF A1504
R108 RES MF W4 3K9 1% 1H239 SW305 TACT SWITCH 2-PIN LOW PROF A1504
R109 RES MF W4 3K9 1% 1H239 SW306 TACT SWITCH 2-PIN LOW PROF A1504
R110 RES MF W4 22K 1% 1H322 SW307 TACT SWITCH 2-PIN LOW PROF A1504
R111 RES MF W4 120R 1% 1H112 SW308 TACT SWITCH 2-PIN LOW PROF A1504
R112 RES MF W4 22R 1% 1H022 SW309 TACT SWITCH 2-PIN LOW PROF A1504
R113 RES MF W4 1% 10K 1H310 SW310 TACT SWITCH 2-PIN LOW PROF A1504
R291 RES MF FU W3 5% 3R3 NFR25 1G833 SW311 TACT SWITCH 2-PIN LOW PROF A1504
R292 RES MF W4 1% 8K2 1H282 SW312 TACT SWITCH 2-PIN LOW PROF A1504
R293 RES MF W4 1% 8K2 1H282 T201 ALPHA 7 CD MAINS TRANSFORMER L811TX
R294 RES MF W4 1% 1K0 1H210 T202 DIGITAL OUTPUT COUPLER K 7E015
R295 RES MF W4 1% 10K 1H310 X1 CRYSTAL 16.9344MHz PARALLEL 7X012
R296 RES MF W4 1% 10K 1H310 X201 CER RESON 4.00MHz 7W005
R297 RES MF W4 1% 10K 1H310 Z1 IC OPAMP DUAL NJM2114D 5B2114
R298 RES MF W4 1% 10K 1H310 Z101 IC OPAMP DUAL NJM2114D 5B2114
R301 RES MF W4 1% 33K 1H333 Z201 IC CD DAC PCM1710U 5G1710
R302 RES MF W4 1% 12K 1H312 Z202 IC HCMOS 74HCU04 5J7404
R303 RES MF W4 1% 5K6 1H256 Z203 IC VREG POS 78L05 5D78L05
R304 RES MF W4 1% 3K3 1H233 Z204 IC VREG POS LM317T 5D317T
R305 RES MF W4 1% 2K2 1H222 Z205 IC VREG POS LM337T 5D337
R306 RES MF W4 1% 1K5 1H215 Z206 IC VREG POS LM317T 5D317T
R307 RES MF W4 1% 1K2 1H212 Z207 IC VREG POS LM317T 5D317T
R308 RES MF W4 1% 8K2 1H282 Z208 IC VREG POS 7805 5D7805
R309 RES MF W4 1% 3K3 1H233 Z209 IC VREG NEG 7915 5D7915
R310 RES MF W4 1% 2K2 1H222 Z210 IC MOTOR DRIVER LB1641 5Q1641
R311 RES MF W4 1% 1K5 1H215 Z211 IC CMOS MICRO PIC16C54XT/P 5H16C54X
R312 RES MF W4 1% 1K2 1H212 Z211 IC SOCKET 18 PIN 0.3'' 8S018
R313 RES MF W4 1% 8K2 1H282 Z212 IC CD CXP826P16Q MICRO 5G826
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
ALPHA 7/8/9 CD SERVICE MANUAL
Alpha 8 DAC PCB Only Parts List Alpha 8 DAC PCB Only Parts List
Ref. No. Description Part No. Ref. No. Description Part No.
C1 PPRO 2N7 63V 5% RA 2D227 C49 ELST 22U 20V OSCON 2P622
C2 PPRO 2N7 63V 5% RA 2D227 C50 ELST 22U 20V OSCON 2P622
C3 PPRO 2N7 63V 5% RA 2D227
C53 ELST 220U 16V 2N722
C4 PPRO 2N7 63V 5% RA 2D227
C55 MLC 100N 50V X7R 10% SM 2C410
C5 PPRO 2N7 63V 5% RA 2D227
C56 ELST 100U 25V 2N710
C6 PPRO 2N7 63V 5% RA 2D227
C57 ELST 100U 25V 2N710
C7 PPRO 1N0 63V 5% RA 2D210
C58 ELST NON POLAR 10UF 35V 2U610
C8 PPRO 1N0 63V 5% RA 2D210
C59 ELST NON POLAR 10UF 35V 2U610
C9 PPRO 1N0 63V 5% RA 2D210
C60 PPRO 4N7 63V 5% RA 2D247N
C10 PPRO 1N0 63V 5% RA 2D210
C61 PPRO 4N7 63V 5% RA 2D247N
C11 PPRO 1N0 63V 5% RA 2D210
C62 MLC 10N 50V X7R 10% SM 2C310
C12 PPRO 1N0 63V 5% RA 2D210
C63 ELST 470U 25V RA 2N747
C13 PPRO 470P 63V 5% RA 2D147N
C64 ELST 470U 25V RA 2N747
C14 PPRO 470P 63V 5% RA 2D147N
C65 MLC 10N 50V X7R 10% SM 2C310
C15 PPRO 470P 63V 5% RA 2D147N
C66 ELST NON POLAR 2.2UF 50V 2V522
C16 PPRO 470P 63V 5% RA 2D147N
C67 ELST NON POLAR 2.2UF 50V 2V522
C17 MLC 100P 100V NPO 5% SM 2C110
C68 MLC 10N 50V X7R 10% SM 2C310
C18 ELST 10U 50V 2N610
C69 MLC 33P 100V NPO 5% SM 2C033
C19 ELST 10U 50V 2N610
D1 SSDIODE 1N4148 75V 3A4148
C20 PPRO 1N3 63V 5% RA 2D213N
D2 SSDIODE 1N4148 75V 3A4148
C21 ELST 10U 50V 2N610
L1 33UH IND SM 1812 180mA 7B033
C22 PCRB 100N 100V 5% RA 5mm 2H410
L2 33UH IND SM 1812 180mA 7B033
C23 ELST 10U 50V 2N610
L3 33UH IND SM 1812 180mA 7B033
C24 ELST NON POLAR 10UF 35V 2U610
L4 33UH IND SM 1812 180mA 7B033
C25 ELST NON POLAR 10UF 35V 2U610
L5 33UH IND SM 1812 180mA 7B033
C26 PPRO 4N7 63V 5% RA 2D247N
L6 2U2H INDUCTOR 7D922
C27 PCRB 100N 100V 5% RA 5mm 2H410 Q1 TRANS LF SS N SM BC847B 4A847
C29 ELST 10U 50V 2N610 Q3 TRANS LF SS N SM BC847B 4A847
C30 PPRO 4N7 63V 5% RA 2D247N Q5 TRANS LF SS N SM BC847B 4A847
C34 MLC 10N 50V X7R 10% SM 2C310 Q6 TRANS LF SS N SM BC847B 4A847
C35 MLC 470P 100V NPO 5% SM 2C147 Q8 TRANS LF SS N SM BC847B 4A847
C36 MLC 470P 100V NPO 5% SM 2C147 Q9 TRANS LF SS N SM BC847B 4A847
C37 MLC 10N 50V X7R 10% SM 2C310 Q11 TRANS MOSFET SW ZVNL120A 4K120
C38 MLC 10N 50V X7R 10% SM 2C310 R1 RESISTOR SM W4 1K0 2% 1A210
C39 MLC 10N 50V X7R 10% SM 2C310 R2 RESISTOR SM W4 1K0 2% 1A210
C40 MLC 10N 50V X7R 10% SM 2C310 R3 RESISTOR SM W4 1K0 2% 1A210
C41 MLC 10N 50V X7R 10% SM 2C310 R4 RESISTOR SM W4 1K0 2% 1A210
C42 PPRO 470P 63V 5% RA 2D147N R5 RESISTOR SM W4 1K0 2% 1A210
C43 PPRO 470P 63V 5% RA 2D147N R6 RESISTOR SM W4 1K0 2% 1A210
C44 PPRO 470P 63V 5% RA 2D147N R7 RESISTOR SM W4 1K0 2% 1A210
C45 PPRO 470P 63V 5% RA 2D147N R8 RESISTOR SM W4 1K0 2% 1A210
C46 MLC 100P 100V NPO 5% SM 2C110 R9 RESISTOR SM W4 2K2 2% 1A222
C47 MLC 47P 100V NPO 5% SM 2C047 R10 RESISTOR SM W4 2K2 2% 1A222
ALPHA 7/8/9 CD SERVICE MANUAL
R11 RESISTOR SM W4 2K2 2% 1A222 R73 RESISTOR SM W4 100R 2% 1A110
R12 RESISTOR SM W4 2K2 2% 1A222 R74 RESISTOR SM W4 100R 2% 1A110
R13 RESISTOR SM W4 2K2 2% 1A222 R75 RESISTOR SM W4 100R 2% 1A110
R14 RESISTOR SM W4 2K2 2% 1A222 R80 RESISTOR SM W4 2K2 2% 1A222
R15 RESISTOR SM W4 2K2 2% 1A222 R81 RESISTOR SM W4 2K2 2% 1A222
R16 RESISTOR SM W4 2K2 2% 1A222 R82 RESISTOR SM W4 680K 2% 1A468
R17 RES MF FU W3 10R 5% NFR25 1G010 R84 RESISTOR SM W4 680K 2% 1A468
R18 RESISTOR SM W4 10R 2% 1A010 R85 RESISTOR SM W4 680K 2% 1A468
R19 RESISTOR SM W4 47K 2% 1A347 R86 RESISTOR SM W4 0R0 2% 1A000
R20 RESISTOR SM W4 47K 2% 1A347 R91 RESISTOR SM W4 0R0 2% 1A000
R21 RES MF FU W3 100R 5% NFR25 1G110 R92 RESISTOR SM W4 0R0 2% 1A000
R25 RESISTOR SM W4 0R0 2% 1A000 R94 RESISTOR SM W4 220R 2% 1A122
R34 RESISTOR SM W4 0R0 2% 1A000 R95 RESISTOR SM W4 220R 2% 1A122
R35 RESISTOR SM W4 100R 2% 1A110 R96 RESISTOR SM W4 2K4 2% 1A224
R36 RESISTOR SM W4 100R 2% 1A110 R97 RESISTOR SM W4 2K4 2% 1A224
R37 RESISTOR SM W4 100R 2% 1A110 R98 RESISTOR SM W4 0R0 2% 1A000
R38 RESISTOR SM W4 100R 2% 1A110 R99 RESISTOR SM W4 0R0 2% 1A000
R39 RESISTOR SM W4 220R 2% 1A122 R102 RESISTOR SM W4 0R0 2% 1A000
R40 RESISTOR SM W4 100R 2% 1A110 R103 RESISTOR SM W4 0R0 2% 1A000
R41 RESISTOR SM W4 220R 2% 1A122 R104 RES MF W4 1K2 1% 1H212
R42 RESISTOR SM W4 0R0 2% 1A000 R108 RESISTOR SM W4 100K 2% 1A410
R43 RESISTOR SM W4 100R 2% 1A110 R109 RESISTOR SM W4 100K 2% 1A410
R44 RESISTOR SM W4 100R 2% 1A110 R110 RESISTOR SM W4 100K 2% 1A410
R45 RES MF W4 1K2 1% 1H212 R111 RESISTOR SM W4 100K 2% 1A410
R46 RES MF W4 1K2 1% 1H212 R112 RESISTOR SM W4 680K 2% 1A468
R47 RES MF W4 1K2 1% 1H212 R113 RESISTOR SM W4 680K 2% 1A468
R48 RES MF W4 1K2 1% 1H212 R114 RESISTOR SM W4 100K 2% 1A410
R49 RES MF W4 3K3 1% 1H233 R115 RESISTOR SM W4 0R0 2% 1A000
R50 RES MF W4 3K3 1% 1H233 R117 RESISTOR SM W4 0R0 2% 1A000
R51 RES MF W4 3K3 1% 1H233 RLY1 RELAY 960 OHM 51SB12T A205
R52 RES MF W4 3K3 1% 1H233 SH1 PHONO EMC SHIELD E808MC
R53 RESISTOR SM W4 1K0 2% 1A210 SK1 PHONO SKT 4-WAY EMC GOLD 8D225
R54 RESISTOR SM W4 1K0 2% 1A210 SK203 32-WAY FFC CONN VERT 8K8032
R55 RESISTOR SM W4 4K7 2% 1A247 SK204 23-WAY FFC CONN VERT 8K8023
R56 RESISTOR SM W4 11K 2% 1A311 X1 CRYSTAL 16.9344MHz PARALLEL 7X012
R57 RESISTOR SM W4 11K 2% 1A311 X1 GROMMET 8 I/D X 6.5 THK F021
R58 RESISTOR SM W4 18K 2% 1A318 Z1 IC OPAMP SM OP27 5B027S
R59 RESISTOR SM W4 18K 2% 1A318 Z2 IC OPAMP SM OP27 5B027S
R64 RESISTOR SM W4 47R 2% 1A047 Z3 IC AUDIO DUAL SM 4560D 5B4560M
R65 RESISTOR SM W4 47R 2% 1A047 Z4 IC AUDIO DUAL SM 4560D 5B4560M
R66 RESISTOR SM W4 100K 2% 1A410 Z5 IC VREG POS 78L05 5D78L05
R67 RESISTOR SM W4 470R 2% 1A147 Z7 IC HCMOS SM 74HC74 5K7474
R68 RESISTOR SM W4 10K 2% 1A310 Z8 IC HCMOS SM 74HC74 5K7474
R69 RESISTOR SM W4 10K 2% 1A310 Z11 IC VREG POS 78L05 5D78L05
R72 RESISTOR SM W4 100R 2% 1A110 Z12 IC CMOS SDECO DAC SM5864AP 5G5864
ALPHA 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 LAYOUT
ALPHA 8 CD PLAYER DAC PRINTED CIRCUIT BOARD LAYOUT (underside view)
ALPHA 8 CD PLAYER DAC PRINTED CIRCUIT BOARD LAYOUT (top view)
1 2 3 4 5 6 7 8
LK1 LK2 LK3 LK4 LK5 LK6 LK7 LK8 LK9 LK10
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
D D
LK11 LK12 LK13 LK15 LK16 LK17 LK18 LK19 LK20
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
Power Supplies Microcontroller & Display
LK21 LK22 LK23 LK24 LK25 LK26 LK27 LK28 LK29 LK30 L812C2_8.SCH L812C4_8.SCH
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
INOUT INOUT
LDIN LDIN K0
LK31 LK32 LK33 LK34 LK35 LK36 LK37 LK38 LK39 LK40
LDOUT LDOUT K1
K0
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
K1
LK41 LK42 LK43 LK44 LK45 LK46 LK47 LK48 LK49 LK50
4MHZ 4MHZ
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
DEEM
FILA FILA SMUTE
LK51 LK52 LK53 LK54 LK55 LK56 LK57 LK58 LK59 LK60
FILB FILB AMUTE
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
RMIN
PGML
LK61 LK62 LK63 LK64 LK65 LK67 LK68 LK69 LK70
CLK
DATA
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
SCOR
DAC & Audio outputs
SQCK
LK71 LK72 LK73 LK74 LK75 LK76 LK77 LK78 LK79 LK80 L812C3_8.SCH
XRST
LDON
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
XLT
C SENSE C
LK81 LK82 LK83 LK84 LK85 LK86 LK87 LK88 LK89 LK90
SUBQ
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
LK91 LK92 LK93 LK94 LK95 LK96 LK97
LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP LINK10NP
Links
DD A2 PS A1 A3
Drilling
Update Box Photo Strip BARCODE LABEL BARCODE LABEL
Detail
DRILL_DETAIL UPDATE_BOX PHOTO_STRIP BARCODE_A7CD BARCODE_A8CD
Documentation
B TL1 TL2 TL3 TL4 TL5 B
FD_1 FD_2
TOOLING3.0 TOOLING4.1 TOOLING3.0 TOOLING3.0 TOOLING3.0
FIDUCIAL FIDUCIAL
Tooling Holes & Alignment Marks
F4
PAD1
VFD SUPPORT PAD
ACD_VFD_PAD
T160MASP
Spare Fuse
A DRAWING TITLE 25 June 1996 C38 was 100U EL. LK14 removed & R64 added 4 A
23425
CAH 96_1039
20 Nov 1996 LK66 removed & R65 added 5
Alpha 7 CD Project Sheet CAH 96_1104
CAH 97_1037 24-4-97 UPGRADE IMPROVEMENTS 6
A & R Cambridge Ltd.
Pembroke Avenue Circuit Diagram 7
CAH 97_1069 2-9-97 HDCD LED changed
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB Sheet 1 of4 CAH 97_1101 30-10-97 HDCD LED removed from Alpha 7 CD L812CT 8
Filename 30-Oct-1997
ECO No. DATE DESCRIPTION OF CHANGE DRAWING NO. ISSUE
J:\FILES\PCBS\CIRCUITS\L812C1_8.PRJ DRAWN BY CHK BY
1 2 3 4 5 6 7 8
Spare fuse
1 2 3 4 5 6 7 8
SK204
D16 23
P18V 22
SW201B 21
A1014 Z204 1N4003F 20
TP5
P22VUN
LM317T N18V 19
! P18V 18
I O 17
4
5
6
Vin Vout
16
R44 3R3 FU
ADJ
P18V P5V DAC 15
R39
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