Arcam Diva A80, Diva P80 Schematic

Service

DiVA

Manual

Issue 1.0

A80 Amplifier
P80 Power Amplifier

ARCAMARCAM

Bringing music & movies to lifeBringing music & movies to life

!

Circuit description

o

A80/P80

!

Technical specifications

Circuit diagrams

!

o L943AY

!

Transformers

o

L916TX – 115/230VAC toroidal

o

L917TX – 100VAC toroidal

o

L907TX – 100VAC frame

!

Exploded view diagram

o

A80

Mechanical & packing parts list

!

o A80
o P80

!

Circuit board silk screen

o

A80

o

P80

!

Circuit board parts list

o

A80/P80 combined

Contents List

Circuit description.

Power supply.

The mains input to the unit is supplied at
filtered the Y Caps and locations C200 /C201 and X
cap at location C209, these are in-place to reduce
mains born HF interference and to prevent bridge
rectifier noise from leaving the unit.

The mains select switch at location
conjunction with the dual primaries on the 115/230v
transformers, the switch allows for the units to be used
in territories running a 115v or 230v grid when the
switch is set to the 115v position the primary windings
are connected in parallel.

Fig 1. Fuse value information.

Fuse location. Value.

FS200 T2.5A (20mm)
FS201 T2.5A (20mm)
FS200 (100v) T3.15A (20mm)
FS201 (100v) T3.15A (20mm)
FS202 (s.m standby 9v a.c rms) T500mA (s.m)
FS203 (D.C inline) T2.0A (20mm)
FS204 (D.C inline) T2.0A (20mm)

The standby Transformer TX200 continuously powers

digital

the
connected to the unit, this supply powers the Micro via
a regulating circuit based around regulator
special mention should be made of fuse FS202 as any
interruption to this supply will render the unit
completely lifeless and as such this circuit should be
checked before inspecting any other areas of the
board.

We will see that the main power transformer
supplies a separate secondary winding for the

–15v analogue

board locations FS203 and FS204, the failure of either
of these fuses will cause the op-amps connected to the
regulated rails to swing D.C. The regulator at location
REG 200 regulates the +15 rail and intern supplies the
+5V(A) analogue supply via the reference Zener at
location

The high level power amp A.C supplies arrive at
Con204 as a 4-wire supply this allows us to implement
a dual bridge network circuit with 4 individually
smoothed D.C rails these are labelled as +45(L),
+45(R) and -45(L), -45(R) we pull a –38v rail from this
point to form the VFD cathode bias voltage via R211
Con205 delivers the 3.3 V A.C supply to the main
board and then onto the display VFD via R203 (2R2
f.u).

DZ200

circuitry (+4.8v(D)) when power is

regulation stages via the two fuses at

and drive transistor

SK200

and is

SW200

TR200.

works in

REG 201

TX200

+15

and

Fig 2. Supply identification and related components.

Supply Related components
+ 45v L
+ 45v R

- 45v L

- 45v R

- 38v VFD
+15v (A)

- 15v (A)

+ 5v (A)
+4.8 (D)

Fil 1/Fil 2

Left power amp positive rail.
Right power amp positive rail.
Left power amp negative rail.
Right power amp negative rail.
Display cathode rail derived from –45v(R)
IC 300, 301, 302, 303, 304, 305, 306,
307, 308, 309 also including the input
clamp diodes all within the pre-amp stage.
IC 300, 301, 302, 303, 304, 305, 306,
307, 308, 309 also including the input
clamp diodes all within the pre-amp stage.
IC309 volume control
Input trigger stages, signal detect IC700,
delayed off IC703, IC701. Main micro
IC600.Remote pickup, Master reset
IC601, Over current detect-AC detect –
thermal cut-out IC600

3.3v~ filament supply.

Pre-amp.

The A80 Pre-amp has inputs for Phono, Aux, CD, Tuner,
AV, DVD and Tape. All inputs except Phono have a simple
resistor-capacitor 340Khz low pass filter to remove any
unwanted high frequency noise from the input signal/local
area, a pair of diodes on each input connected to the
+15/-15v rails prevent damage to the CMOS input
switching chips at locations IC300 and IC301, if any offset
is seen at the input the switching chips on a given input we
may suspect the failure of one of the input diodes.

Fig 3. Logic status of IC302 and 303 (switching chip).

Low= 0V High=4.8 (Cmos).

Input. A0
Phono
Aux
CD
Tuner
AV
DVD
Tape

The outputs of IC300 (L) and IC301(R) can be seen on pin
8 as a current signal and such this can not be viewed via
CRO although a 100 ohm resistor inline with the scope
probe may yield some results, from here we drive into line
drive op-amp IC307 (L) and IC308 (R) signal can be seen
at the output pin (1) and travelling into the volume control
chip (IC309) on pins 16 (L) and 9 (R) the output from the
Volume control is driven into IC307 at pin 6 (L) and IC308
pin 6 (R) and seen again on pins 7 on both IC307 and
IC308. After the Con 302 and Con 303 we drive directly

(pin 1)

Low Low Low

Low High Low

High High Low

Low Low High

High Low High

Low High High

High Low Low

A1

(pin 16)

A2

(pin 15)

Into the power amp stages but from this point we can
configure the unit as a separate Pre amp/Power amp
by moving the jumpers to the pin 2 and 3 of Con 304
and Con 305, and then remove the jumpers at Con
302 and Con 303 this may also be of use when fault
finding as we can effectively isolate the and D.C
offset/distortion problems coming from the Pre amp
stage to the power amp stages and test these stages
as a separate entity.

The Pre amp power up mute and power down mute is
controlled by the relay at location RLY300 A/B the
relay also triggers to mute the switching noise when
switching between inputs (see micro control/protection
and display section).

Power amp stages.

The main power amplifiers are of a Class A/B design
which use SAP “audio” transistors in a asymmetrical
current feedback configuration, Input and feedback
paths are D.C coupled and there is a active integrating
servo to remove D.C offsets from the outputs.

The basic principle of operation is as follows: Left
channel description given only, read all references as
5xx for the right channel.

The input level of the power amp stage is clamped by
the 3V9 zener diodes at positions DZ402 and DZ403
this protects the power amp input stages from gross
overload and subsequent damage R410 and R402 and
C416 in parallel form a 340khz filter.

IC400A is a V-I converter with a gain of 2 it’s output
will be a accurate amplification of it’s input voltage (i.e
the output voltage at pin 1 will be identical to the input
at pin 3 but twice the amplitude) the output voltage is
driven unto a 44 ohm load formed by R445 and R446
this op-amp is used in a slightly unusual configuration
in that it’s power supply pins are used as a current
output and the output pin is used as a current
feedback. Transistors TR404 and TR408 supply the +/­15v rails and act as cascades to pass it’s supply pin
currents through to the current mirrors.

The “feedback current” flows back from the power amp
output via R447-R450 to allow IC400A to swing it’s
output, this is why the term current feedback is used –
it’s is the current flowing in the feedback resistors that
sets the overall gain of the amplifier.

IC400B acts as an inverting integrator and it’s purpose
is to remove DC from the loudspeaker outputs. Any
positive D.C offset will cause the output of IC400B to
go negative thus increasing the current in it’s negative
supply pin and pulling the output voltage back to zero
R420 and C442 set the time constant of the integrator
so that audio frequencies are ignored

The transistors found at locations TR400 and
TR401/TR402 form the PNP Wilson mirrors and TR416
and TR411/TR417 form the Wilson NPN current mirrors,
emitter degeneration is provided by R405, R406 (+) and
R407, R408 (-).

R415 and R416 decouple the current mirror stages from
the main power supply stages to allow the bootstrap circuit
to operate this circuit is formed by C423 and C424 and the
Metal film 1 watt resistors at locations R452/R453, the
boots strap is provided to allow the output stage rails to go
up and down slightly with the output signal to the
loudspeaker, this enables the driver stage to fully saturate
the output drivers giving the greatest output and the best
thermal efficiency.

TR405 and TR407 are the Pre-drivers, TR412/TR414 and
R411/R434 provide a current limit of about 30mA under
fault conditions. R423 and R428 loosely couple the
outputs of the output drivers to the inputs of the SAP
output devices, this allows the output devices inbuilt
temperature sensing diodes to accurately control the
quiescent current of the output drivers as the temperature
varies, C425 and C405 ensure that both halves of the
output stage receive an equal A.C component.

The output transistors are TR413 and TR415 these are
specially designed for audio power use Sanken SAP15N
and SAP15P devices they provide a inbuilt 0W22 thick film
power resistor and temperature sensing diodes that track
the V

BE

versus temperature characteristics of the power
transistors allowing for accurate control of the quiescent
current.

R459 and C427 form the Zobel network which is provided
to ensure that the amplifier see a constant and resistive
load at high frequencies C421 locally couples the “High
frequency” and signal grounds together at the input stage
for the same reason. Any signs of burning or scorching of
R459 will indicate that the unit amplifier channel(s) have
been running unstable or oscillating.

The Bias should be set for minimum distortion (THD+N)
using a 0.5v rms 20 Khz sine wave into the CD input with
the amplifier set for full gain, the absolute maximum level
of Bias acceptable is 22mV measure across CON401 (L)
or CON 501 (R) the adjustment is made using RV400 and
RV500 we set the bias at the factory using an extremely
accurate Audio Precision-audio analyser.

If you do not have access to a distortion level meter
capable of 0.05% or better accuracy you may be able to
rough set the amplifier to a typical reading of 15mV (at
cold switch on).

Fig 4. Suggested blanket replacement parts for

power amp failures.

Location Description Model Part no.

TR413 Output driver + SAP15NY 4CSAP15N
TR415 Output driver - SAP15PY 4CSAP15P
TR410 Predriver + FMMT 497 4AFMMT497
TR412 Predriver + ZDT 6758 4AZDT6758
TR414 Predriver - ZDT 758 4AZDT758
TR405 Predriver - FMMT 597 4AFMMT597
TR401 Current mirror PNP BC859B 4A859
TR402 Current mirror PNP FMMT 597 4AFMMT597
TR411 Current mirror NPN FMMT 497 4AFMMT497
TR417 Current mirror NPN BC849B 4A849B
TR412 Driver bias + ZDT 6758 4AZDT758

Fig 4a. SAP NY/PY output driver information.

SAP 15NY SAP 15PY

Under output driver failure conditions the 0.22 internal emitter
resistor will usually go open, the resistor should be measured between
pins S and E.

S-E = 0.22 ohm.

Micro control/protection and display.

The micro is tasked with providing an instantaneous safe
operating area for both the amplifier and loudspeaker by
monitoring the below areas.

o D.C
o Over current

o

at both left and right channel outputs.

within either power amp stage.

Over temp

detection for both power amp stages.

o A.C present detection.

Please see fig 5. For voltage readings with regards to the protection

operations.

Within the A80 integrated amplifier these tasks are
performed by the H8 type micro at circuit location IC602,
within the P80 power amp version the tasks are performed
by the PIC micro at location IC603, the protection lines are
“daisy chained” to both micros regardless of witch one is
fitted.

To operate both micros require a constant stable supply
voltage, this is derived from the

+4.8v(D)

rail from
transformer TX200 and via regulator REG201 this supply
should be constant at anytime mains appears at the
amplifier power input.

Please note: This supply is protected from over-current
and over-voltage operation by the surface mount fuse at
location

FS202

T500mA and as such if the Amplifier fails
to power up this supply should be checked before making
any further investigations.

We also need to see a

X600

.

4.00 Mhz

clock at crystal location

The micro interfaces with the pre-amp stage input
selection

(see Fig 3)

and the volume control level
adjustment we also drive the VFD via the display
drive/keyboard scan micro at location IC800.

IC602 receives Keyboard scan data and RC5 from the
remote pick-up diode at location RX800. The
power on
switches

reset

can be found on the display board and

HI

(4.8v) after mains in.

master

Fig 5. Working status of protection lines and fault
status

.

Low =0v High = 4.8 (Cmos).

Location Fault Line Output pin Working

IC 601A AC present 2 High
IC 600A Over current 3 Low
IC 600B Therm prot (L) 6 High
IC 600D Therm prot (R) 11 High
IC 600C Therm prot main 8 Low
R634 D.C prot (L) N/A Low (D.C)
R635 D.C prot (R) N/A Low (D.C)
R663 D.C prot combined N/A Low

The Protection

is live at all times that even in standby
due to the fact that all chips related with these
functions are driven from the 4.8(D) supply rails.
As we can see from

Fig 4

we can isolate the left and
right channel protection lines for both over current and
D.C offset by looking at the protection lines before they
are mixed into single fault status lines for the micro at
location IC600 this will allow us to identify the channel
that is “flagging the fault”.

Both versions of the Amplifier have the ability to warn
the user and/or engineer of a internal fault, the A80 will
use both the Power LED and front panel display, the
P80 has no display and as such uses the sequence of
LED flash codes listed below in Fig 7.

Fig 6. A80 fault alert information.

Power LED status Fault indicated

LED red during start up DC offset fault
Led red during normal use Fault as shown on display

Fig 7. P80 fault alert information.

Power LED status Fault indicated

LED flashing green DC offset (left or right)
Flashing red Short circuit fault (over current)
Flash amber Thermal fault (heatsink L or R)
Red on flash green Multiple protection lines triggered

The Micro has direct control over all internal relays for
protection and output control, the speaker relay control
lines can be seen on the diagram as SPKR1 for SP1
and the SPKR2 for SP2 outputs, these lines switch
High to engage the relay.

The A80 pre-amp relay should disengage when
switching inputs to prevent any chip switching noise
from leaving the pre-amp stage the control line can be
seen on R385 and switches High to engage the relay.

Signal Detect and Delayed off – P80 only.

Signal detection is achieved by amplifying the signal
present at the power amp inputs by a large amount
using two channels of a quad op-amp at location
IC700 A/B the outputs of this op-amp are summed by
a non-inverting comparator formed using the two
remaining op-amp channels these will produce a active
High reset pulse at the output pin 14.

When mains is plugged into the P80, the master
*Reset line goes low and the 0.38Hz clock starts
ticking. The *Reset pulse resets the latch effecting a
HIGH *Q output and thus a LOW circuit output. When
the signal detect Latch and Counter Reset go HIGH
(an input is detected), the *SD latch input is driven
LOW by the inverter and *Q goes LOW the circuit
output then goes high switching the Amplifier on.

If the Amplifier does not see audio on it’s Power amp
inputs for either 12 or 45 minutes (this can be user
configured by moving the jumper at position CON702) the
Amplifier will auto switch into standby.

Jumper settings.

If you want to turn the A80 into a separate Pre-Power amp
(make the Line out become a Pre-amp out and make the
pre-out become a power amp in) adjust the setting of the
following links.

Remove the jumpers from Con 302 and Con 305 (this
disconnects the pre-amp output from the power amp input)
Fit jumpers on pins 2 & 3 of Con 304 & Con 305
(disconnects the line output buffer from the line out
sockets and connects the pre out sockets to the line out
sockets)

You can change the Phono input of the A80 into a AUX2
input by fitting jumpers on pins 2 & 3 of Con 306 an Con
307 this routes the signal directly from the Phono inputs
into a separate set of inputs on the pre-amp switches
IC302 and IC303.

We need to enable the AUX2 input by pressing AV,TAPE
and PHONO now use the rotary encoder to change the
selection, press confirm to select the new setting.

Con 400 and Con 500 are for the Bias setting and should
not be altered, if in doubt you should not measure more
than 22mV

across Con 401 and Con 501 when the
amplifier is idle and this should be adjustable using RV400
and RV500 (L&R channels).

Con 601 and Con 602 are for re-programming (move the
jumper from Con 601 to Con 602 when reprogramming
otherwise the jumper should be on Con 601).

Con 700 and Con 701 are used to set the P80 signal
detect sensitivity as default the link is fitted giving a input
sensitivity of roughly ~500uV if the jumpers are removed
the sensitivity decreases roughly x4 to 2mV this setting
can be used for operation with noisy source equipment.

Con 702 is used to set the time coefficient of the auto
power off delay, the default pins are 1 & 2 this gives a
delay of 12 minutes until the amp powers down under a no
signal period, if we place the jumpers on pin 2 & 3 this
time increases to 45 minutes +/- 20%.

Fig 8. Jumper settings.

Jumper A80 P80

Con 300, Con 301 Not fitted Fitted
Con 302, Con303 Fit (NF for pre/pwr) Not fitted
Con 304, Con 305 1&2 (2&3 for

pre/pwr)

Con 306, Con 307 1&2Phono;(2&3

Aux2)
Con 400,Con 500 Factory set Factory set
Con 601 Fit (NF to program) Not fitted
Con 602 Fit (NF to program) Not fitted
Con 700, Con 701 Not fitted Fit (0.5mv), NF (2mV)
Con 702 Not fitted 1&2 (12 mins; 2&3

Not fitted

Not fitted

45mins).

Fig 9. Major components pin identification.

74HC14

TLO 72

ZDT 758/ZDT 6758

1=Collector 1
2=Collector 1
3=Collector 2
4=Collector 2
5=Emitter 2
6=Base 2
7=Emitter 1
8=Base 1

FMMT 497/597

NJM2114

DG408DY

74HC00D

BC849/BC859

3=Collector

1=Anode
2=Cathode
3=Common connection

1=Base
2=Emitter

BAV99 Diode package

LM431 Adjustable Zener shunt regulator

Technical Specifications.

Continuous Power output

Both channels driven 8 ohms 20 Hz – 20 kHz = 65 Watts

Single Channel driven 4 ohms 20 Hz – 20 kHz = 80 Watts

Distortion 8 ohms at 80% power output 1Khz = 0.008%

Input stage specifications.

RIAA input stage sensitivity (M.M) = 2.5 mV

Line input sensitivity = 630 mV (Default)

Input impedance = 22k ohms

Signal to noise ratio CCIR weighted (2 volt input) = 105dB

Pre-amp output specifications.

Nominal output level = 610 mV

Output impedance = < 3 ohms

LS100
G P PRECISION

ITEM101 1 Tape D/Sided 12MM X 70MM DS Polyester 4965F205 Placed between VFD and PCB; NF ON P80

ITEM102 1 Earth Lead Assy 75MM8M101

ITEM103 2 Pad Damping 15x6x3MM SorbothaneE802AP

ITEM104 4 13/16 inch O-RingF232

Soldered to SKT200

Placed on output relays

Rubber O-Rings fitted over main power supply caps

ANNOTATION

FIX100
Dia 3.5mm

Power Supplies
L943C2_5.1.SCH

PWR_ON

FIX101
Dia 3.5mm

1

0V(D)

P101

C101
100N
50V
0805

9VRMS

+4.8V(D)

+45V_R

+45V_L

0V(D)
0V_LS_L
0V_HF_L
0V_FB_L

0V(SIG)

0V(SIG_2)

0V_FB_R
0V_HF_R
0V_LS_R

0V(PSU)

-45V_L

-45V_R

-38V_VFD
FIL_1
FIL_2

+15V(A)

+5V(A)

-15V(A)

FIX102
Dia 3.5mm

FIX103
Dia 3.5mm

FIX104
Dia 3.2mm

0V(SIG_2)

+45V_L
+4.8V(D)
0V(D)

Power Amp Left
L943C4_5.1.SCH

PRE_OUT_L

0V_FB_L

+45V_L

VIPROT_L

OUTPUT_L

0V_LS_L
0V_HF_L

-45V_L

R100

5R6
2W
CF

L100

2U2

R101

5R6
2W
CF

L101

2U2

RLY100A
Omron

G5Z-2AE

LS101
G P PRECISION

R105
330R
1W
CF

GENERAL NOTES

This is the Master Schematic for A80 (L943AY) and P80 (L944AY) PCB
assemblies. Any changes to the schematics in this document must be
reflected in the relevant child documents.

When generating BOMs for L943AY or L944AY, ensure that the relevant
components are fitted or not fitted (those with "NF" or "FIT" in the nearby text).

These schematics follow a simple heirarchy scheme. Sheet symbols on the top
sheet represent a child or sub-sheet. Net labels on sub-sheets are local or
specific to that sheet. Ports on the sub-sheets connect to sheet entries on
the parent sheet, where they are connected together.

Primary power nets are denoted by type in parenthesis, e.g. 0V(D).
Secondary nets are denoted by underscores, e.g. 0V_LS_L.

To perform an electrical rule check or synchronise with the PCB, set Net
Identifier Scope to Sheet Symbols/Port Connections.

R104
330R
1W
CF

Q121
Q125

Q106
Q111

CON100
1
2
3
4
5

AMP

CT

CON101

AMP
CT

HEADPHONE OUTPUT & MUTE

1
2
3
4

Q116

5

Q117

R107
100R
1W
CF

(NF ON P80)

R106
100R
1W
CF

RLY102A
NEC
EB2-5NU

RLY102B
NEC

EB2-5NU

RLY102C
NEC
EB2-5NU

NF

R102 0R0

0W125 0805

NF

R103 0R0

0W125 0805

D102
BAS16
SOT-323

*PRE_MUTE
0V(D)

VOL_*CS

VOL_*CS

0V(SIG_2)

+45V_L
0V(D)

DRAWING TITLE

2 3 4 2 5

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

A80/P80 - Top Level Sheet

Filename:

L943C1_5.1.SCH

Notes:

A80

Contact Engineer :

R108 220R

0W25 MF

R109 220R

0W25 MF

Contact Tel: [phone]Mark Tweedale

D100
1N4003
DO-41

TR100
BD179
TO-126

R110

R112

220R

2K2

0W25

0W125

MF

0805

R114
0R0
0W25
MF

03_E264 MJT 09 Sept 03 None to this sheet. Remove EMC can from around IEC inlet. 5.1

03_E230 MJT 04 Aug 03 5.0

03_E147 MJT 23 May 03 None to this sheet. PCB change. 4.0

03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3 .0

03_E116 TGP NO CHANGE TO THIS SHEET 2.117 APR 03

INITIALS

Printed:

DATE

9-Sep-2003

ECO No. DESCRIPTION OF CHANGE

TR101
BD179
TO-126

R111

R113

220R

2K2

0W25

0W125

MF

0805

Changed P80 s/w & fitted IC socket for IC603 (P80 only).
Display snapoff fixing holes reduced to 3.2mm

18Sheet of

DRAWING NO.

L943C1

ISSUE

SH200

EMC Shield

NF

SKT200

N

E

L

BULGIN
PX0580

1

This EMC can should now not appear
on any BoM as there is a safety
issue regarding the can shorting to a
live mains track on the top layer.

Consider removing the holes for the
can or perhaps move mains tracks
onto bottom layer for next PCB
revision.

C200
3N3
250V
CER

C201
3N3
250V
CER

EARTH

NEUTRAL

LIVE

C209

115V 230V

220N
275V
PP X2

2A22B

1A11B

SW200
18-000-0019

FS201
T2.5A
S506

FHLDR201
20mm HLDR

FS200
T2.5A
S506

FHLDR200
20mm HLDR

MAINS WIRING AND AUXILIARY SUPPLY

TX200

1 5

9V

9V

PCB Mount Frame

7A9301

CON201
WAGO
256

3

BLUE

2

DK GREY

1

ORANGE

1

GREEN

CON202
WAGO
256

CON203

1

GREEN

WAGO
256

6

FS202

T500mA
R452

8

FIX200
Dia 3.2mm

C202
3N3

250V
CER

C203
3N3
250V
CER

1

RLY200A
Takamisawa
F1CA005V

RLY200B
Takamisawa
F1CA005V

115V

2

3 7

115V

4

C221
100N
100V
MKS2

L916TX

(CHASSIS-MOUNTED)

BLUE

BLUE

115V ac

BLACK

ORANGE

115V ac

GREEN

GREEN/YELLOW
Interwinding Screen

WHITE

BLACK

GREY

WHITE

3.2Vac

WHITE

ORANGE

16Vac

BLUE

16Vac

ORANGE

DBR203
3BDF01M

C225
1000UF
25V
YK

HS201A
SW50-2

8.8C/W

CON204

WAGO
256

REG201
LM317T

TO-220

BLUE
LT GREY
DK GREY

GREY

D214
BAS16
SOT-323

ADJ

R217
680R
0W125
0805

1
2
3
4

ITEM203 1 Clip For SW Profile HeatsinkF006

+4.8V(D)

R218
220R
0W25
MF

R219
22R
0W125
0805

0V(D)

0V(D)

C205
470N
100V
MKS2

PCB Traces to route as shown here

C206
470N
100V
MKS2

C226
1000UF
10V
YK

9VRMS

+4.8V(D)

POWER AMP SUPPLIES

SP200

DBR200
GBU8D

DBR201
GBU8D

SP201

C228
3,300UF
63V
USR

C230
3,300UF
63V
USR

PWR_ON

C229
3,300UF
63V
USR

C231
3,300UF
63V
USR

R216

2K2
0W125
0805

P202

+4.8V(D)

0V(D)

RLY200C
Takamisawa
F1CA005V

TR202
FMMT497
SOT-23

R221 0R0

0W125 0805

SP202

D215
BAS16
SOT-323

0V(SIG)

0V(D)

0V_FB_R

0V_LS_L

0V_LS_R

0V_HF_R

0V_HF_L

0V_FB_L

+45V_R
+45V_L

0V(SIG)

0V(D)

0V_FB_R

0V_LS_L

0V_LS_R

0V_HF_R

0V_HF_L

0V(PSU)

0V_FB_L

-45V_L

-45V_R

ANNOTATION

CON200

ORANGE

BLUE

ORANGE

WAGO 256

ANALOGUE OP-AMP SUPPLIES

FS203

T2A
R452

C204
470N
100V

FS204

T2A
R452

MKS2

1
2
3

C211
100N
50V
0805

C210
100N
50V
0805

D200
1N4003
DO-41

D202
1N4003
DO-41

(NF ON P80)

D201
1N4003
DO-41

D203
1N4003
DO-41

R204

0R0
0W125
0805

R205

0R0
0W125
0805

C215
1000UF
35V
YK

C216
1000UF
35V
YK

C214
100N
50V
0805

C213
100N
50V
0805

HS200A
6043PB
23C/W

HS202A
6043PB
23C/W

D210
BAS16
SOT-323

REG200
LM317T

ADJ

TO-220

C217
100UF
25V
YK

C218
100UF
25V
YK

REG202
LM337T

ADJ

TO-220

D211
BAS16
SOT-323

P200

P201

R207
100R
0W125
0805

R208
100R
0W125
0805

R213
2K2
0W125
0805

R214
2K2
0W125
0805

R209
100R
0W125
0805

R210
100R
0W125
0805

D212
BAS16
SOT-323

D213
BAS16
SOT-323

C207
22UF
20V
OSCON

C208
22UF
20V
OSCON

R206
10R
0W125
0805

C224
1000UF
25V
YK

R215
2K2
0W125
0805

DZ200
BZX84C
5V6
SOT-23

TR200
BC849B
SOT-23

SP203

C219
100UF
25V
YK

0V(SIG_2)

+15V(A)

+5V(A)

+4.6V to +5.3V

C220
100UF
25V
YK

0V(SIG)

Track by pre-out to pwr-in

0V(SIG_2)

For preamp bulk decoupling

-15V(A)

CON205

WAGO
256

GREY
GREY

2
1

DRAWING TITLE

2 3 4 2 5

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

R203

2R2
0W33
FU

A80/P80 Power Supplies

Filename:

Notes:

Contact Engineer :

VFD SUPPLY

(NF ON P80)

C222
100N
50V
0805

L943C2_5.1.SCH

A80

C212

0V(D)

22UF

28Sheet of

63V
YK

DRAWING NO.

-38V_VFD

FIL_1

FIL_2

ISSUE

L943C2

R211

1K0
0805
0W125

03_E264 MJT 09 Sept 03 Remove EMC can from around IEC inlet. 5.1

03_E230 MJT 04 Aug 03 None to this sheet. Display snapoff fixing holes reduced to 3.2mm 5.0

03_E147 MJT 23 May 03 Removed double connection from R221 to star point. PCB change. 4. 0

03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3 .0

03_E116 TGP R204, R205 CHANGED FROM 2R2 TO 0R 2.117 APR 03

INITIALS

Printed:

DATE

9-Sep-2003

Contact Tel: [phone]Mark Tweedale

ECO No. DESCRIPTION OF CHANGE

0V_LS_L

DZ406
BZX84C
3V9
SOT-23

+45V_L

VIPROT_L

OUTPUT_L

0V_LS_L

0V_HF_L

-45V_L

->

R405
47R
0W125
0805

TR408
FMMT497
SOT-23

Q403

IC400A
TL072CD

84

SO-8

3

2

PRE_OUT_L

R400
22K
0W125
0805

C410
100UF
25V
YK

0V_HF_L

INPUT FILTER V TO I AMP

R410

1K0
0W125
0805

DZ404
BZX84C
15V
SOT-23

R402
22K
0W125
0805

0V_FB_L

C416
470P
100V
FKP2

C417
100N
50V
0805

SHEET 3

0V_FB_L

0V_HF_L

C419
100N
50V
0805

C414
100UF
25V
YK

0V_HF_L

0V_FB_L

DZ405
BZX84C
15V
SOT-23

C420
100N
50V
0805

Q409

TR404
FMMT597
SOT-23

TR400
BC859B
SOT-23

1

0V_FB_L

R445
22R
0W25
MF

R446
22R
0W25
MF

D400
BAS16
SOT-323

NF

C400

47P
100V
0805

NF

C401

47P
100V
0805

PNP CURRENT MIRROR

INTEGRATING DC SERVO

C422

470N
100V
MKS2

7

R443

IC400B

4K7

TL072CD

0W125

SO-8

0805

NF

NPN CURRENT MIRROR

R407
47R
0W125
0805

TR416
BC849B
SOT-23

D404
BAS16
SOT-323

R404
22K
0W125
0805

R415
220R
0W25
MF

R406
47R
0W125
0805

TR401
BC859B
SOT-23

TR402
FMMT597

C402

100P
100V
0805

R420

1M0
0W125
0805

6

5

R403 10K

0W125 0805

C406
10N
100V

R416
220R
0W25
MF

0805

C415
100UF
25V
YK

R413
1K0
0W125
0805

C403

100P
100V
0805

SOT-23

0V_FB_L

PRE DRIVER BIAS
& TEMP . COMP .

R433
22R
0W125
0805

TR411
FMMT497
SOT-23

TR417
BC849B
SOT-23

R408
47R
0W125
0805

~1.6V

0V_FB_L

C411
100UF
25V
YK

C404
10N
100V
0805

C407
10N
100V
0805

BOOTSTRAPBOOTSTRAP

PRE DRIVER

TR407
FMMT497
SOT-23

C423
100UF
100V
YK

R452
1K0
1W
CF

R453
1K0
1W
CF

C424
100UF
100V
YK

TR405
FMMT597
SOT-23

PRE DRIVER

R422

100R
0W125
0805

R427

100R
0W125
0805

D405
1N4003
DO-41

C425
10UF
50V
YK

D408
1N4003
DO-41

R431
22R
0W125
0805

D401
BAS16
SOT-323

BIAS MEASURE BIAS

ADJUST

C405
10N
100V
0805

R434
22R
0W125
0805

RV400
220R
LIN

C408
22UF
63V
YK

0V_HF_L

DZ400
22V
BZX84C
SOT-23

OUTPUT STAGE V-I PROTECTION

R438
10K
0W125
0805

R411
1K0
0W125
0805

R454
100K
0W125
0805

R414
1K0
0W125
0805

CON401
HARWIN
M20-973

1
2

R456

330R
0W125
0805

R457

330R
0W125
0805

R424
100R
0W125
0805

R429
100R
0W125
0805

R432
22R
0W125
0805

C412
100UF
25V
YK

C413
100UF
25V
YK

R435
22R
0W125
0805

R441
10K
0W125
0805

R425

100R
0W125
0805

R430

100R
0W125
0805

V-I PROTECTION

DZ401
22V
BZX84C
SOT-23

0V_HF_L

C409
22UF
63V
YK

D402
BAS16
SOT-323

TR409
FMMT497
SOT-23

TR406
FMMT597
SOT-23

D403
BAS16
SOT-323

R426

100R
0W125
0805

D406
1N4003
DO-41

D407
1N4003
DO-41

R436
10K
0W125
0805

R442
4K7
0W125
0805

TR410
FMMT497
SOT-23

0V_HF_L

0V_HF_L

TR403
FMMT597
SOT-23

R401
10K
0W125
0805

R444
10K
0W125
0805

R459
5R6
2W
CF

ZOBEL NETWORK

C427
100N
100V
MKS2

C421

100N
50V
0805

VI PROTECT
SIGNAL TO MICRO

C426
10UF
50V
YK

* - Default jumper setting on pins 2 & 3; fit jumper
on pins 1 & 2 to increase bias voltage;
remove jumper to decrease bias voltage

DRAWING TITLE

2 3 4 2 5

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

A80/P80 - Power Amp Left

Filename:

L943C4_5.1.SCH

Notes:

Contact Engineer :

INITIALS

Printed:

DATE

9-Sep-2003

48Sheet of

DRAWING NO.

L943C4

Contact Tel: [phone]Mark Tweedale

ECO No. DESCRIPTION OF CHANGE

ISSUE

->

R505
47R
0W125

R500
22K
0W125
0805

0V_FB_R

0V_FB_R

C517
100N
50V
0805

C516
470P
100V
FKP2

DZ505
BZX84C
15V
SOT-23

C520
100N
50V
0805

C510
100UF
25V
YK

0V_HF_R

INPUT FILTER V TO I AMP

PRE_OUT_R

P515

SHEET 3

0V_FB_R

DZ502
BZX84C
3V9
SOT-23

DZ503
BZX84C
3V9
SOT-23

0V_HF_R

R510

1K0
0W125
0805

C519
100N
50V
0805

C514
100UF
25V
YK

DZ504
BZX84C
15V
SOT-23

R502
22K
0W125
0805

0V_HF_R

0805

P501

TR508
FMMT497
SOT-23

Q503

IC500A
TL072CD

84

SO-8

3

2

Q509

TR504
FMMT597
SOT-23

TR500
BC859B
SOT-23

1

0V_FB_R

R545
22R
0W25
MF

R546
22R
0W25
MF

D500
BAS16
SOT-323

NF

C500

47P
100V
0805

NF

C501

47P
100V
0805

NF

R509

P502

1K0
0W125
0805

INTEGRATING DC SERVO

C522

470N
100V
MKS2

7

R543

IC500B

4K7

TL072CD

0W125

SO-8

0805

NF

R551 18K

0W25 MF

R547

820R
0W25
MF

R548

820R
0W25
MF

P533

PNP CURRENT MIRROR

NF

R512

1K0
0W125
0805

NPN CURRENT MIRROR

P554

R507
47R
0W125
0805

TR516
BC849B
SOT-23

D504
BAS16
SOT-323

R504
22K
0W125
0805

R515
220R
0W25
MF

R506
47R
0W125
0805

P508

TR501
BC859B
SOT-23

P509

P507

R537
5K6
0W125
0805

P559

TR502
FMMT597
SOT-23

NF

R519
470K
0W125
0805

0V_FB_R

TR512B
ZDT6758
SM-8

REF500

LM431AIM3
SOT-23

PRE DRIVER BIAS
& TEMP . COMP .

TR514A
ZDT758
SM-8

R533
22R
0W125
0805

P542

TR511
FMMT497
SOT-23

P558

TR517
BC849B
SOT-23

R508
47R
0W125
0805

P504

C502

R517

P505

1K0

100P

0W125

100V

0805

0805

R520

1M0
0W125
0805

6

D509

P520 P527

5

BAV99
SOT-23

0V_FB_R0V_FB_R

NF

R558 18K

R516
220R
0W25
MF

0W25 MF

C506
10N
100V
0805

CON500
HARWIN
M20-973

*

P556

R518

1K0
0W125
0805

123

R540 4K7

0W125 0805

R503 10K

0W125 0805

R539
22K
0W125
0805

P539
C515
100UF
25V
YK

P538

R560
330R
0W125
0805

R513
1K0
0W125
0805

C503

100P
100V
0805

P540

R549

820R
0W25
MF

R550

820R
0W25
MF

~1.6V

0V_FB_R

0V_FB_R

C511
100UF
25V
YK

NF

R521
470K
0W125
0805

0V_FB_R

C504
10N
100V
0805

C507
10N
100V
0805

BOOTSTRAPBOOTSTRAP

PRE DRIVER

TR507
FMMT497
SOT-23

C523
100UF
100V
YK

R552
1K0
1W
CF

R553
1K0
1W
CF

C524
100UF
100V
YK

TR505
FMMT597
SOT-23

PRE DRIVER

P510

P544

R522

100R
0W125
0805

R527

100R
0W125
0805

D505
1N4003
DO-41

C525
10UF
50V
YK

D508
1N4003
DO-41

TR512A
ZDT6758
SM-8

P511

R531
22R
0W125
0805

R523
220R
0W25
MF

D501
BAS16
SOT-323

BIAS MEASURE BIAS

ADJUST

C505
10N
100V
0805

R528
220R
0W25
MF

R534
22R
0W125
0805

P546

TR514B
ZDT758
SM-8

TR513

SAP15NY
SAP

RV500
220R
LIN

TR515

SAP15PY
SAP

C508
22UF
63V
YK

0V_HF_R

DZ500
22V
BZX84C
SOT-23

Q500

OUTPUT STAGE V-I PROTECTION

R538
10K
0W125
0805

R511
1K0
0W125
0805

R554
100K
0W125
0805

R514
1K0
0W125
0805

CON501
HARWIN
M20-973

1
2

R556

330R
0W125
0805

R557

330R
0W125
0805

P549

R524
100R
0W125
0805

R529
100R
0W125
0805

R532
22R
0W125
0805

C512
100UF
25V
YK

C513
100UF
25V
YK

R535
22R
0W125
0805

R541
10K
0W125
0805

R525

100R
0W125
0805

R530

100R
0W125
0805

P529

P551

V-I PROTECTION

Q511

DZ501
22V
BZX84C
SOT-23

0V_HF_R

C509
22UF
63V
YK

D502
BAS16
SOT-323

P530

TR509
FMMT497
SOT-23

TR506
FMMT597
SOT-23

P552

D503
BAS16
SOT-323

R526

100R
0W125
0805

D506
1N4003
DO-41

D507
1N4003
DO-41

P531

P513

R536
10K
0W125
0805

R542
4K7
0W125
0805

P532

TR510
FMMT497
SOT-23

0V_HF_R

0V_HF_R

TR503
FMMT597
SOT-23

P514

R501
10K
0W125
0805

R544
10K
0W125
0805

R559
5R6
2W
CF

ZOBEL NETWORK

C527
100N
100V
MKS2

VI PROTECT
SIGNAL TO MICRO

C526
10UF
50V
YK

OUT_R

C521

100N
50V
0805

0V_LS_R

DZ506
BZX84C
3V9
SOT-23

+45V_R

ANNOTATION

VIPROT_R

OUTPUT_R

0V_LS_R

0V_HF_R

-45V_R

ITEM500 1 Con Jumper Socket 0.1IN Gold Blue8K004

* - Default jumper setting on pins 2 & 3; fit jumper
on pins 1 & 2 to increase bias voltage;
remove jumper to decrease bias voltage

DRAWING TITLE

2 3 4 2 5

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

A80/P80 - Power Amp Right

Filename:

L943C5_5.1.SCH

Notes:

A80

Contact Engineer :

Contact Tel: [phone]Mark Tweedale

03_E264 MJT 09 Sept 03 None to this sheet. Remove EMC can from around IEC inlet. 5.1

03_E230 MJT 04 Aug 03 None to this sheet. Display snapoff fixing holes reduced to 3.2mm 5.0

03_E147 MJT 23 May 03 None to this sheet. PCB change. 4.0

03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3 .0

03_E116 TGP NO CHANGE TO THIS SHEET 2.117 APR 03

INITIALS

Printed:

DATE

9-Sep-2003

58Sheet of

DRAWING NO.

L943C5

ECO No. DESCRIPTION OF CHANGE

ISSUE

TO MAIN PCB - SHEET6

R840
47K
0W125
0805

-25V(FL)_A80

R841
47K
0W125
0805

R842
47K
0W125
0805

R843
47K
0W125
0805

R844
47K
0W125
0805

R845
47K
0W125
0805

R846
47K
0W125
0805

R847
47K
0W125
0805

R849
47K
0W125
0805

-25V(FL)_A80

SW812
SDTX-644

1

2

+4.8V(D)_DISP

0V(D)_DISP

R832
330R
0W125
0805

R833
330R
0W125
0805

0V(D)_DISP

R836
330R
0W125
0805

LED805
5mm
GRN
LED 5mm

+4.8V(D)_DISP

-25V(FL)_A80

0V(D)_DISP

R835
330R
0W125
0805

LED804
5mm
GRN
LED 5mm

C817
100N
50V
0805

0V(D)_DISP

R834
330R
0W125
0805

LED803
5mm
GRN
LED 5mm

DRAWING TITLE

ARCAM

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

A80 & P80 Display Circuitry

Filename:

L943C8_5.1.SCH

Notes:

Contact Engineer :

Contact Tel: [phone]Mark Tweedale

INITIALS

Printed:

DATE

9-Sep-2003

88Sheet of

ECO No. DESCRIPTION OF CHANGE

A2

DRAWING NO.

ISSUE

L943C8

+45V_L

+4.8V(D)

0V(D)

0V_CHASS

+45V_L

+4.8V(D)

0V(D)

0V_CHASS

NF ON P80

C705
100N
50V
0805

0V_CHASS

C701
100N
50V
0805

SKT700
HOSIDEN HSJ

GND1

GND2

L700
70R@100MHz

0V(D)

NC1

NC2

C700
100N
50V
0805

C710

100P
100V
0805

TRIGGER OUT

~13.5V @ 30mA max

R727
10K
0W125
0805

R706
0R0
0W125
0805

TR700
BD179
TO-126

P708

P80 TRIGGER IN

<-------- Vin

R738
2K2
0W125
0805

Vout=0.82Vin

R728
10K
0W125
0805

R726
22R
0W125
0805

(NF ON A80)

Q715

DZ701
BZX84C
4V7
SOT-23

R715

100R
0W125
0805

+4.8V(D)

R707

1 2

4K7
0W125
0805

P707

D704

R724
22K
0W125
0805

TR701
BC849B
SOT-23

BAT54SSOT-23

+45V_L

R725
22K
0W125
0805

Q709

DZ700
BZX84C
15V
SOT-23

ITEM700 3 Con Jumper Socket 0.1IN Gold Blue8K004

C720
10UF
50V
YK

NF ON A80

ANNOTATION

REMOTE_P

REMOTE_N

TO SHEET 6

TRIG_IN

0.38Hz_CLK

*RESET

PRE_OUT_L

0V_PREOUT

PRE_OUT_R

NF

R714

0R0
0W125
0805

0.38Hz_CLK

R700

100K
0W125
0805

P715P716

R721
0R0
0W125
0805

0V(D)

R701

100K
0W125
0805

R709
33K
0W125
0805

R710
33K
0W125
0805

C702

P701

100N
50V
0805

C711
100P
100V
0805

SET SENSITIVITY

Jumper Fitted = ~0.5mVrms (default);
Jumper Not Fitted = ~2mVrms

C712
100P
100V
0805

C703

P704

100N
50V
0805

SET SENSITIVITY

Jumper Fitted = ~0.5mVrms (default);
Jumper Not Fitted = ~2mVrms

P700

CON700

HARWIN
M20-973

P709

CON701

HARWIN
M20-973

P80 SIG DETECT

(NF ON A80)

+4.8V(D)

R735

C715

47R

100UF

0W125

25V

0805

R702
100K
0W125
0805

R722
680R
0W125
0805

C716
100UF
25V
YK

R703
100K
0W125
0805

R723
680R
0W125
0805

C717
100UF
25V
YK

0V(D)

YK

3

2

D700

D701

BAV99 SO T-23

10

9

D702

BAV99 SO T-23

D703

BAV99 SO T-23

IC700A
LM324D
SO-14

411

1

0V(D)

R704

100K
0W125
0805

BAV99 SOT-23

IC700C
LM324D
SO-14

8

R705

100K
0W125
0805

+1.6V(D)

P702

R716
330R
0W125
0805

2
1

0V(D)

+1.6V(D)

P705

R717
330R
0W125
0805

2
1

0V(D)

P713

P710

C704
100N
50V
0805

+4.8V(D)_2

C721
220UF
16V
YK

P712

R711
22K
0W125
0805

R712
22K
0W125
0805

+1.6V(D)

+4.8V(D)_2

R718
1K0
0W125
0805

P703

R719
1K0
0W125
0805

R720
1K0
0W125
0805

0V(D)

IC700B
LM324D
SO-14

5

6

R713

100K
0W125
0805

C706

P711

7

100N
50V
0805

P706

+1.6V(D)

R708
100K
0W125
0805

+4.8V(D)_2

0V(D)

P714

C718
100UF
25V
YK

R736
3K3
0W125
0805

R737
2K2
0W125
0805

IC701A

IC700D
LM324D
SO-14

12

13

14

LATCH & COUNTER RESET

Q714

Q713

DRAWING TITLE

10

CP

11

MR

74HCT4040D
SO-16

A80/P80 Trig, RC5 & P80 Sig Det

2 3 4 2 5

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

9

Q0

7

Q1

6

Q2

5

Q3

3

Q4

2

Q5

4

Q6

13

Q7

12

Q8

14

Q9

15

Q10

1

Q11

Filename:

Notes:

A80

Contact Engineer :

Q718

L943C7_5.1.SCH

P80 DELAYED OFF

Q719

AUTO-OFF
DELAY SET

CON702

1
2
3

HARWIN
M20-973

Pins 1&2: ~12 mins (default)
Pins 2&3: ~45 mins

Contact Tel: [phone]Mark Tweedale

(NF ON A80)

0V(D)

Power-On Reset

+4.8V(D)_2

IC701B

16

VCC

+4.8V(D)_2

0V(D)

GND

74HCT4040D
SO-16

IC703C

VCC

GND

74HCT74D
SO-14

TR702
MMUN2111LT1
SOT-23

R733
3K3
0W125
0805

INVERTER

4

IC703A

0V(D)

2

D

3

CLK

12

D

11

CLK

5

Q

SD

6

Q

RD

74HCT74D

1

SO-14

Q

Q

INITIALS

Printed:

Q724

9

P724

8

DATE

9-Sep-2003

LATCH

10

IC703B

SD

RD

74HCT74D

13

SO-14

03_E264 MJT 09 Sept 03 None to this sheet. Remove EMC can from around IEC inlet. 5.1

03_E230 MJT 04 Aug 03 None to this sheet. Display snapoff fixing holes reduced to 3.2mm 5.0

03_E147 MJT 23 May 03 None to this sheet. PCB change. 4.0

03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3 .0

03_E116 TGP NO CHANGE TO THIS SHEET 2.117 APR 03

ECO No. DESCRIPTION OF CHANGE

8

14

7

78Sheet of

0V(D)

+4.8V(D)_2

0V(D)

Q727

C708
100N
50V
0805

C709
100N
50V
0805

DRAWING NO.

L943C7

ISSUE

TO SHEET 3

OUTPUT_L

OUTPUT_R

0V(SIG)

-38V_VFD

-45V_L

0V(SIG)

-45V_L

PREAMP CONTROL LINES

*PRE_MUTE

+4.8V_D_PRE

0V_D_PRE

TAPE_0

TAPE_1

TAPE_2

VOL_SCLK

0V_SER

VOL_SDATA

LISTEN_ 0

LISTEN_ 1

LISTEN_ 2

REMOTE_P

(From Sheet 7)

+45V_L

+45V_R

+4.8V(D)

0V(D)

R611 10K

0W125 0805

R613 10K

0W125 0805

R626 10R

0W125 0805

R616 10K

0W125 0805

R618 10K

0W125 0805

+45V_L

+45V_R

+4.8V(D)

0V(D)

R612 10K

0W125 0805

R614 1K0

0W125 0805

R615 1K0

0W125 0805

R617 10K

0W125 0805

AC PRESENT DETECT

9VRMS

FIL_2

FIL_1

R619

10K
0W125
0805

NF ON P80

R601 0R0
0W125 0805

OVERCURRENT DETECTION

VIPROT_L

0V(D)

VIPROT_R

0V(D)

D600
BAS16
SOT-323

C612
10N
100V
0805

C613
10N
100V
0805

0V(D)

NF ON P80

C600
100N
50V
0805

0V(D)

IC601G

74HC14
SO-14

NF ON P80

R604 0R0
0W125 0805

NF ON A80

R602
0R0
0W125
0805

Q600

Q601

Q603

Q604

Q605

Q606

Q607

Q608

Q609

Q610

Q611

14

VCC

7

GND

TR600
BC849B
SOT-23

IC601B

3 4

74HC14
SO-14

IC601C

5 6

74HC14
SO-14

-38V_VFD

+4.8V(D)

0V(D)

R629
47R
0W125
0805

C602
100N
50V
0805

+4.8V(D)

0V(D)

IC600E

VCC

GND

74HC00D
SO-14

*PRE_MUTE_u

+4.8V_D_PRE

TAPE_0_u

TAPE_1_u

TAPE_2_u

VOL_SCLK_u

VOL_SDATA_u

LISTEN_0_u

LISTEN_1_u

LISTEN_2_u

R630
3K3
0W125
0805

C622
10UF
50V
YK

1

2

+4.8V(D)

14

7

0V(D)

C619
100UF
25V
YK

IC601A

1 2

74HC14
SO-14

IC600A

74HC00D
SO-14

C601
100N
50V
0805

3

C620
100UF
25V
YK

FIL_2

FIL_1

Q633

Q634

AC_PRESENT

0V(D)

NF ON A80

R603
0R0
0W125
0805

NF ON A80

R605
0R0
0W125
0805

0V(D)

VI_LIM

NF

C614

10N
100V
0805

DC OFFSET DETECTION

R634

100K
0W125
0805

R635

100K
0W125
0805

NF

C615

0V(D)

10N

22

100V
0805

CON600 MOLEX 52045

Q629

DZ600
BZX84C
3V9
SOT-23

Q614

R640
33K
0W125
0805

DZ601
BZX84C
3V9
SOT-23

Q616

R641
33K
0W125
0805

P80:0V(D)

A80:REMOTE

Q619

C623
10UF
63V
NONP

C624
10UF
63V
NONP

P80:*SP2_LED

A80:PHASE_A

Q620

Q612

Q613

+45V_L

+45V_R

P80:0V(D)

P80:0V(D)

P80:*SP2_SW

A80:FIL1

A80:PHASE_B

A80:FIL2

Q621

Q622

Q623

TO DISPLAY - SHEET 8

D601

BAV99
SOT-23

RTH600
PTC 110DEG
PTC

R638
680R
0W125
0805

TR602
FMMT597
SOT-23

R645
4K7
0W125
0805

RTH601
PTC 110DEG
PTC

R639
680R
0W125
0805

TR603
FMMT597
SOT-23

R647
4K7
0W125
0805

P80:*PWR_BTN

P80:*SP1_LED

P80:*SP1_SW

A80:VFD_SDO

A80:VFD_SDATA

A80:VFD_SCLK

Q624

Q625

ITEM600 1 Con Jumper Socket 0.1IN Gold Blue8K004

0V(D)

TRIG_IN

DRAWING TITLE

2 3 4 2 5

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

NF ON A80

R652

33K
0W125
0805

NF ON A80

C621
100UF
25V
YK

VFD_CS
*PWR_LED_RED
*PWR_LED_GRN

VFD_SCLK / *PWR_BTN
VFD_SDO / *SP1_SW
VFD_SDATA / *SP1_LED

*NMI

+4.8V(D)

*PWR_LED_RED
*PWR_LED_GRN

CON601
HARWIN
M20-973

1

2

IC601F

74HC14
SO-14

Fit jumper for
normal operation

R637
100K
0W125
0805

REMOTE
PHASE_A / *SP2_LED
PHASE_B / *SP2_SW

*RESET

*PWR_LED_RED
*PWR_LED_GRN

PHASE_A / *SP2_LED

PHASE_B / *SP2_SW
VFD_SDO / *SP1_SW
VFD_SDATA / *SP1_LED

VFD_SCLK / *PWR_BTN
REMOTE

A80/P80 Protection & Micros

1213

VOL_SCLK_u

Filename:

Notes:

Contact Engineer :

0.38Hz OSCILLATOR

(FOR P80 AUTO-OFF)

R624

10K
0W125
0805

A80 MICRO

(NF on P80)

VOL_SDATA_u

Fit jumper to
re-program

L943C6_5.1.SCH

*PRE_MUTE_u

RS232_RX
RS232_TX

R642
2K2
0W125
0805

LISTEN_1_u

LISTEN_2_u

2

CON602
HARWIN
M20-973

LISTEN_0_u

1

TAPE_2_u

TAPE_1_u

R632
3K3
0W125
0805

TAPE_0_u

Contact Tel: [phone]Mark Tweedale

31

32

30

29

NC

NC

33

NC

34

NC

35

NMI

36

P80/FTCI

37

P81/FTIOA

38

P82/FTIOB

39

P83/FTIOC

40

P84/FTIOD

41

P85

42

P86

43

P87

44

P20/SCK3

45

P21/RXD

46

P22/TXD

47

NC

48

NC

SPKR2_ON
SPKR1_ON
PWR_ON

TRIG_IN
AC_PRESENT

THERM

R643
2K2
0W125
0805

P76/TMOV

NC49NC50P14/IRQ051P15/IRQ152P16/IRQ253P17/IRO3/TRGV54PB4/AN455PB5/AN556PB6/AN657PB7/AN758PB3/AN359PB2/AN260PB1/AN161PB0/AN062NC63NC

R633
3K3
0W125
0805

0V(D)

ECO No. DESCRIPTION OF CHANGE

+4.8V(D)

26

27

P57/SCL

P74/TMRIV28P75/TMCIV

R644
2K2
0W125
0805

EEPROM_SDATA
EEPROM_SCLK

24

25

23

P11

P12

P56/SDA

INITIALS

Printed:

22

P10/TMOW

P55/WKP5/ADTRG

21

DC_OFFSET

DATE

9-Sep-2003

18

NC

P52/WKP219P53/WKP320P54/WKP4

VI_LIM

0V(D)

17

IC602

NC

NC

NC
P51/WKP1
P50/WKP0

Vcc
OSC1
OSC2

Vss
TEST

RES

Vcl

X1
X2

AVcc

NC
NC

HD64F3664FP

64

L943SW
LQFP-64

0V(D)

0.38Hz_CLK

16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

68Sheet of

+4.8V_D_PRE

0V(D)

+4.8V(D)

R609
0R0
0W125
0805

SP602

5
6

7

+4.8V(D)

0V(D)

C610
100N
50V
0805

C609
100N
50V
0805

SPKR2_ON

SPKR1_ON

*RESET

0V(D)

P80 MICRO

(NF ON A80)

+4.8V(D)

C611
100N
50V
0805

0V(D)

R610
0R0
0W125
0805

0V(D)0V(D)

DRAWING NO.

0.38Hz_CLK

(To Sheet 7)

IC604A

SDA
SCL

WP

24C02
SO-8

0V(D)

C608
100N
50V
0805

2

PWR_ON
SPKR2_ON
SPKR1_ON

(To Sheet 7)

IC604B

8

4

24C02
SO-8

*RESET

VCC

GND

A2
A1
A0

3
2
1

3

1

L943C6

ANNOTATION

X600

4.00MHz
SIL-3

(To Top Sheet)

ISSUE

+45V_R

R636
100K
0W125

D602

BAV99
SOT-23

P625

D603

BAV99
SOT-23

-45V_L

0805

R650
22K
0W125
0805

Q631

TR608
FMMT497
SOT-23

TR605
FMMT597
SOT-23

0V(D)

TR604
FMMT597
SOT-23

DZ602
BZX84C
4V7
SOT-23

Q632

NF ON P80

R623
10K
0W125
0805

THERMAL CUTOUT

IC600B

4

6

5

74HC00D
SO-14

IC600C

9

10

IC600D

12

13

74HC00D
SO-14

Q618
Q635
Q636
Q637

C630

100P
100V
0805

NF ON A80

R606
0R0
0W125
0805

0V(D)

+4.8V(D)

C605
100N
50V
0805

0V(D)0V(D)

74HC00D
SO-14

11

C631

100P
100V
0805

Q638

8

NF ON P80

R653 330R
0W125 0805
R655 330R
0W125 0805

R657 330R
0W125 0805
R659 330R
0W125 0805

NF ON P80

R661 330R
0W125 0805

NF ON A80

R607
0R0
0W125
0805

0V(D)

0V(D)

R654 330R
0W125 0805

R656 330R
0W125 0805
R658 330R
0W125 0805

R660 330R
0W125 0805

R622 10K
0W125 0805

C606
100N
50V
0805

NF ON A80

R608
0R0
0W125
0805

FIX600
Dia 3.5mm

DC_OFFSET
THERM

1

AC_PRESENT
DC_OFFSET
VI_LIM
THERM

REMOTE
PHASE_A / *SP2_LED
PHASE_B / *SP2_SW

VFD_SDO / *SP1_SW
VFD_SDATA / *SP1_LED
VFD_SCLK / *PWR_BTN
VFD_CS

*PWR_LED_RED
*PWR_LED_GRN
*NMI
*RESET

(From Sheet 7)

Q639

C607
100N
50V
0805

0V(D)

1N0

C603
100N
50V
0805

C604
100N
50V
0805

C628

1N0
100V
0805

IC601D

74HC14
SO-14

IC601E

74HC14
SO-14

C626

1N0
100V
0805

NF ON P80

C618
10N
100V
0805

C629

1N0
100V
0805

89

1011

NF ON P80

C627

1N0
100V
0805

Q628

R620

2K2

R646

0W125

4K7

0805
0W125
0805

R621

2K2
R648

0W125
4K7

0805
0W125
0805

P80:0V(D)

A80:VFD_CS

Q626

Q627

Q630

Q640

DZ603
BZX84C
4V7
SOT-23

0V(D)

Q641

DZ604
BZX84C
4V7
SOT-23

0V(D)

NF ON P80

C625

100V 0805

C616

10N
100V

P80:*RESET

P80:0V(D)

P80:*PWR_LED_GRN

P80:*PWR_LED_RED

A80:*PWR_LED_RED

A80:*PWR_LED_GRN

0805

C617

10N
100V
0805

A80:+4.8V(D)

A80:*RESET

-38V_VFD

123456789101112131415161718192021

+15V(A)

0V(SIG)

-15V(A)

DVD INPUT

C336

1N0

0V(SIG)

100V
0805

AV INPUT

TUNER INPUT

C337

1N0

0V(SIG)

100V
0805

CD INPUT

+15V(A)

0V(SIG)

-15V(A)

AUX INPUT

C338

1N0

0V(SIG)

100V
0805

PHONO/

C300
10N
100V
0805

C301
10N
100V
0805

C312
10N
100V
0805

C313
10N
100V
0805

0V(SIG)

0V(SIG)

0V(SIG)

+15V(A)

-15V(A)

+15V(A)

D302

TAPE IN L

TAPE IN R

0V(SIG)

+15V(A)

+15V(A)

0V(SIG)

0V(SIG)

+15V(A)

+15V(A)

0V(SIG)

0V(SIG)

+15V(A)

+15V(A)

-15V(A)

R317
100K
0W125
0805

0V(SIG)

R316
100K
0W125
0805

BAV99 SO T-23

D309

D310

BAV99 SO T-23

R320
100K
0W125
0805

R321
100K
0W125
0805

BAV99 SO T-23

D314

D315

BAV99 SO T-23

R323
100K
0W125
0805

R327
100K
0W125
0805

BAV99 SO T-23

D318

D319

BAV99 SO T-23

+15V(A)

-15V(A)

+15V(A)

-15V(A)

SCRN

+15V(A)

-15V(A)

+15V(A)

-15V(A)

SCRN

+15V(A)

-15V(A)

+15V(A)

-15V(A)

SCRN

D316

D300

BAV99
SOT-23

D301

BAV99
SOT-23

D307

BAV99
SOT-23

D308

BAV99
SOT-23

D313

BAV99
SOT-23

D317

BAV99
SOT-23

SKT302

KUNMING

GOLD

SKT303

KUNMING

GOLD

SKT304

KUNMING

GOLD

BAV99 SO T-23

R300

1K0
0W125
0805

REAR PANEL VIEW

R305

1K0
0W125
0805

R304

1K0
0W125
0805

REAR PANEL VIEW

R309

1K0
0W125
0805

R308

1K0
0W125
0805

REAR PANEL VIEW

PLACE JUMPERS ON PINS 1 & 2
TO ENABLE PHONO (DEFAULT),

BAV99
SOT-23

PINS 2 & 3 FOR AUX2

C324
470P
100V
FKP2

C327
470P
100V
FKP2

C320
470P
100V
FKP2

C321
470P
100V
FKP2

C325
470P
100V
FKP2

C331
470P
100V
FKP2

-15V(A)

-15V(A)

-15V(A)

-15V(A)

-15V(A)

-15V(A)

TAPE INPUT

C322
470P
100V
FKP2

R302

1K0
0W125
0805

R301

1K0
0805
0W125

0V(SIG)

-15V(A)

R306

1K0
0W125
0805

0V(SIG)

R310

1K0
0805
0W125

0V(SIG)

-15V(A)

R311

1K0
0W125
0805

0V(SIG)

R314

1K0
0805
0W125

0V(SIG)

R318
100K
0W125
0805

R303

1K0
0W125
0805

R319
100K
0W125
0805

R322
100K
0W125
0805

R324
100K
0W125
0805

R325
100K
0W125
0805

R328
100K
0W125
0805

C306

10N
100V
0805

C314

10N
100V
0805

0V(SIG)

123

KUNMING

C323
470P
100V
FKP2

C308

10N
100V
0805

C326
470P
100V
FKP2

C328
470P
100V
FKP2

C317

10N
100V
0805

C329
470P
100V
FKP2

C332
470P
100V
FKP2

CON306
HARWIN
M20-973

CON307
HARWIN
M20-973

123

GOLD

C334
1N0
100V
0805

SCRN

DVD R

DVD L

+15V(A)

AV L

AV R

TUNER R

TUNER L

+15V(A)

CD L

CD R

AUX R

AUX L

AUX2 L
PHO L

AUX2 R
PHO R

SKT300

REAR PANEL VIEW

TAPE OUTPUT

TOP_R

TOP_L

PHONO L

PHO L

PHONO R

PHO R

PHONO L

TAPE IN L

AUX L

CD L

TUNER L

AV L

DVD L

R312

AUX2 L

1K0
0W125
0805

PHONO R

TAPE IN R

AUX R

CD R

TUNER R

AV R

DVD R

R315

AUX2 R

1K0
0W125
0805

INPUT BUS

C353

100P
100V
FKP2

C354

100P
100V
FKP2

0V(SIG)

0V(SIG)

R326
100K
0W125
0805

R329
100K
0W125
0805

R339
47K
0W125
0805

R340
47K
0W125
0805

R345
820R
0W125
0805

0V(SIG)

R348
820R
0W125
0805

0V(SIG)

C330
470P
100V
FKP2

R363 22K

0W125 0805

R364 22K

0W125 0805

R365 22K

0W125 0805

R366 22K

0W125 0805

C333
470P
100V
FKP2

TAPE OUTPUT SELECT

PHONO PREAMP

C343

+15V(A)

IC306A
NJM2114M

C357
22UF
50V
CFNE

C358
22UF
50V
CFNE

DMP-8

R349

680K
0W125
0805

C359

4N7
100V
FKP2

R350

680K
0W125
0805

R367 22K

0W125 0805

R368 22K

0W125 0805

R369 22K

0W125 0805

R370 22K

0W125 0805

3

2

5

6

LISTEN_1_PRE

LISTEN_2_PRE

LISTEN_1_PRE

LISTEN_2_PRE

84

1

-15V(A)

C361
1N0
100V
FKP2

7

IC306B
NJM2114M
DMP-8

LISTEN_0_PRE

LISTEN_0_PRE

100N
50V
0805

C342 100N

50V 0805

+5V(A)

0V(SIG)

+5V(A)

0V(SIG)

C363

330P
100V
FKP2

4
5
6

7
12
11
10

9

2

1
16
15

14

4

5

6

7
12
11
10

9

2

1
16
15

14

0V(SIG)

X0
X1
X2
X3
X4
X5
X6
X7

EN
A0
A1
A2

GND

X0
X1
X2
X3
X4
X5
X6
X7

EN
A0
A1
A2

GND

+15V(A)

13

3

-15V(A)

+15V(A)

13

3

-15V(A)

IC302

V+

D

V-

DG408DY
SO-16

IC303

V+

D

V-

DG408DY
SO-16

8

8

-15V(A)

-15V(A)

C373

10UF
50V
YK

C374

10UF
50V
YK

C378

22P
100V
0805

R341
47K
0W125
0805

R342
100K
0W125
0805

C380

22P
100V
0805

R343
47K
0W125
0805

R344
100K
0W125
0805

0V(SIG)

0V(SIG)

0V(SIG)

0V(SIG)

R346
820R
0W125
0805

R347
820R
0W125
0805

IC307A
NJM2114M
DMP-8

2

3

IC308A
NJM2114M
DMP-8

2

3

+15V(A)

-15V(A)

C367
220UF
16V
YK

+15V(A)

-15V(A)

C370
220UF
16V
YK

ITEM300 6 Con Jumper Socket 0.1IN Gold Blue8K004

A80 PreAmp Out /A80 Line Out /

TAPE OUTPUT

IC304B

5

7

6

TL072CD
SO-8

0V(SIG)

0V(SIG)

0V(SIG)

0V(SIG)

0V(SIG_2)

C347

100N

84

50V

1

0805

C346

100N

0V(SIG)

50V
0805

C351

100N

84

50V

1

0805

C350

100N

0V(SIG)

50V
0805

5

6

IC305A
TL072CD
SO-8

3

2

+15V(A)

-15V(A)

C386

100UF
25V
CFNE

C388

100UF
25V
CFNE

IC305B

TL072CD
SO-8

+15V(A)

84

-15V(A)

0V(SIG)

0V(SIG)

IC304A
TL072CD
SO-8

3

2

7

1

R383
10K
0W125
0805

R384
10K
0W125
0805

C344

100N
50V
0805

C345

100N
50V
0805

+15V(A)

84

-15V(A)

0V(SIG_2)

C385
10UF
50V
YK

-15V(A)

C340

100N

0V(SIG)

50V
0805

1

C341

100N
50V
0805

LINE OUTPUT

R381

C376

10K

22P

0W125

100V

0805

0805

0V(SIG)

R382

C377

10K

22P

0W125

100V

0805

0805

VOLUME CONTROL

+15V(A)

0V(SIG_2)

0V(SIG)

DRAWING TITLE

C384
10UF
50V
YK

C352
100N
50V
0805

C348
100N
50V
0805

0V(SIG) 0V(SIG) 0V(SIG_2)

+5V(A)

0V(SIG)

A80 PreAmp

2 3 4 2 5

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

D303

-15V(A)

BAV99
SOT-23

D304

-15V(A)

BAV99
SOT-23

D311

-15V(A)

BAV99
SOT-23

FIT JUMPERS ON
PINS 1 & 2 (2 & 3
FOR PRE/PWR)

D312

-15V(A)

BAV99
SOT-23

+5V(A)

C349
100N
50V
0805

Filename:

Notes:

Contact Engineer :

R332 47R

0W125 0805

+15V(A)

R333 47R

0W125 0805

+15V(A)

R334 47R

0W125 0805

+15V(A)

R335 47R

0W125 0805

+15V(A)

C390
100UF
25V
YK

*PRE_MUTE_PRE

VOL_SDATA_PRE
0V_SER_PRE
VOL_SCLK_PRE

L943C3_5.1.SCH

TOP_L

TOP_R

123

CON304
HARWIN
M20-973

123

CON305
HARWIN
M20-973

-15V(A)

0V(SIG)

C369
220UF
16V
YK

-15V(A)

Contact Tel: [phone]Mark Tweedale

0V(SIG)

C379
22P
100V
0805

C381
22P
100V
0805

0V(SIG)

KUNMING

GOLD

SKT301

1

2

CON301
HARWIN
M20-973

1

2

CON300
HARWIN
M20-973

D320
BAS16
SOT-323

INITIALS

Printed:

C387

100UF
25V
CFNE

C389

100UF
25V
CFNE

DATE

9-Sep-2003

5

7

6

IC307B
NJM2114M
DMP-8

IC308B
NJM2114M
DMP-8

6

7

5

0V(SIG)

0V(SIG)

C372
220UF
16V
YK

ECO No. DESCRIPTION OF CHANGE

P80 PowerAmp InP80 Pre Out Loop

SCRN

C335
1N0
100V
0805

+15V(A)

REAR PANEL VIEW

-15V(A)

D305

BAV99
SOT-23

D306

BAV99
SOT-23

0V_PREOUT

FIT JUMPERS

RLY300C

NEC
EB2-5NU

*PRE_MUTE

*PRE_MUTE_PRE

0V_D_PRE

FIT JUMPERS TO ENGAGE
PREAMP FOR A80 BUILD
(NF FOR P80 OR PRE/PWR)

CON302
HARWIN
M20-973

1

RLY300A

NEC
EB2-5NU

2

CON303
HARWIN
M20-973

RLY300B

NEC
EB2-5NU

0V(SIG)

DRAWING NO.

2

0V(SIG)

0V(SIG)

R362
22K
0W125
0805

R372
22K
0W125
0805

R336

47R
0W125
0805

R337

47R
0W125
0805

38Sheet of

-15V(A)

+15V(A)

PRE_OUT_L

1

PRE_OUT_R

ISSUE

L943C3