SPHINX Project Eight Service Manual

SPHINX Project Eight Service Manual

1

A

SERVICE MANUAL

PROJECT EIGHT

REFERENCE

PRE-AMP

A

SPHINX Project Eight Service Manual

2

1. UNPACKING.......................................................................................................................................3

2. SPHINX WARRANTY CARD ..............................................................................................................3

3. CONTACTING THE MANUFACTURER.............................................................................................3

4. TECHNICAL SPECIFICATIONS.........................................................................................................4

5. GENERAL CHECKLIST......................................................................................................................5

Serial number and software version ............................................................................................................5

Input functions .............................................................................................................................................5

Channel imbalance......................................................................................................................................5

Remote Control............................................................................................................................................5

6. SPHINX REMOTE CONTROL............................................................................................................6

Buttons and LED indication .........................................................................................................................6

Operation..................................................................................................................................................... 7

Selecting without switching..........................................................................................................................7

'Learning' the commands.............................................................................................................................7

Changing a command..................................................................................................................................7

Erasing all commands of one component....................................................................................................7

The LED during Normal mode.....................................................................................................................8

The LED during 'Learn' mode......................................................................................................................8

Batteries.......................................................................................................................................................8

Other things worth knowing... ......................................................................................................................8

Encountering problems................................................................................................................................8

7. MEASUREMENTS ..............................................................................................................................9

General set-up............................................................................................................................................. 9

Necessary Equipment..................................................................................................................................9

Audio signal distortion measurement...........................................................................................................9

Set-up ..........................................................................................................................................................9

8. OUTPUT DC-OFFSET ADJUSTMENT.............................................................................................10

Set-up ........................................................................................................................................................10

Adjustment.................................................................................................................................................10

9. PROBLEMS AND SOLUTIONS........................................................................................................11

10. DIAGRAMS AND PARTS LISTS ....................................................................................................12

Figure 1: Front panel .................................................................................................................................12

Figure 2: Rear panel.................................................................................................................................. 12

Index of diagrams and drawings................................................................................................................13

Figure 3: Connection Diagram for testing the Project Eight.......................................................................14

Figure 4: Display Board Schematic Layout................................................................................................ 15

Figure 5: Construction Drawing for top cover plate....................................................................................16

Figure 6: Schematic Operational Diagram Project Eight ...........................................................................17

Figure 7: Schematic Overview of all relevant potentiometers....................................................................18

Figure 8: Disamp-96 ..................................................................................................................................19

Figure 9: Functional Schematic.................................................................................................................20

Figure 10: Left Power Supply.....................................................................................................................21

Figure 11: Right Power Supply..................................................................................................................22

Figure 12: Input/Output..............................................................................................................................23

Figure 13: Left Volume Control..................................................................................................................24

Figure 14: Right Volume Control................................................................................................................25

Figure 15: Left Output Amp........................................................................................................................26

Figure 16: Right Output Amp.....................................................................................................................27

Figure 17: Left Input Amp ..........................................................................................................................28

Figure 18: Right Input Amp........................................................................................................................29

Figure 19: Power Supply Unit....................................................................................................................30

Figure 20: PCB drawings...........................................................................................................................31

Parts List....................................................................................................................................................32

SPHINX Project Eight Service Manual

3

The Sphinx Project Eight design

The Sphinx Project Eight was designed for the
ever-increasing group of quality-conscious
audiophiles.
We are very proud of the tradition connected with
the SPHINX name, especially concerning audio
quality perfection.
This service manual will help you to optimally
service and repair the Sphinx Project Eight
Reference Pre-Amp.

This Reference pre-amp uses the newest
technologies and refined designs and is extremely
simple to operate.
Features include ultra-linear extremely low-noise
Class A audio circuits, built from the finest hand­selected parts.
The signal path is completely balanced from input
to output, and left and right are totally separated.
Volume and balance controls are achieved by
means of precision relays, as is the input selection.
All settings and controls can also be accessed from
the supplied Sphinx Remote Control.

To obtain the maximum quality from this pre amp it
is necessary for it to be properly aligned and to be
used with top quality audio components, preferably
other Sphinx components.

1. UNPACKING

Before leaving the factory every Project Eight is
subjected to stringent and extensive technical and
exterior quality inspection. This ensures the user
many years of high quality audio from a perfect­looking product.
We recommend owners to ship the Project Eight in
its original carton.

After unpacking the Project Eight we therefore
recommend you carefully check it for any transport
damage.
If you find any damage and the product has not
been shipped in the original carton the ensuring
repair costs will not be covered by the warranty.

2. SPHINX WARRANTY CARD

To be entitled to any warranty repairs the owner
must have send the filled out warranty card to
Sphinx or a distributor where it has been registered.
Other regulations may apply in your specific
country: when in doubt, please consult the proper
authorities.

3. CONTACTING THE MANUFACTURER

In case of any problem not covered in this manual
or if you have other questions you may contact the
Sphinx International Service Department in The
Netherlands (local time: GMT +1h) during office
hours at the following numbers:

Telephone [phone]
Fax [phone]
E-mail [e-mail]

It is always very helpful and efficient if you have all
relevant information about the specific product and
the problem ready.

Please also refer to the User Manual of the
Project Eight for information about functions
not described in this manual.
It is important to familiarise yourself with the
special functions, operation and possibilities
of the Sphinx Project Eight.

SPHINX Project Eight Service Manual

4

4. TECHNICAL SPECIFICATIONS

Bandwidth 0 - 500,000 Hz (+0/-3 dB)
Phase response error <1°
Gain 20 dB max.
THD+N (IHF-A) <0.008% (2nd harm., < 100 kHz and 6 V into 600 ohm)

<0.0015% (2nd harm., 10 – 20,000 Hz and 6 V into 600

ohm)
IMD <0.0015%
S/N ratio (IHF-A) >110 dB
Channel separation >110 dB

Inputs 2x XLR balanced

6x WBT cinch unbalanced
Level, nominal (for 1 V output) 0.16 V (-18 dBV)
Impedance XLR: 10 kohm / cinch: 50 kohm
Sensitivity (programmable for each input) adjustable between –9 dB and +9 dB

Outputs 2x XLR balanced

1x WBT cinch unbalanced

1x cinch Tape
level 10 V max. (20 dBV) (1 - 100,000 Hz, THD <0.001%)
impedance <10 ohm

Volume control Relay-controlled in steps of 0.2 dB

Range 100 dB
channel imbalance less than 0.2 dB

Sphinx Control 3x optical

OUT-1: 1 second delayed

OUT-2: normal

OUT-3: programmable via Auto On
Remote control full function
Mechanical decoupling of housings Transrotor absorbing 'pucks'

Power supply External, in completely separate housing
Supply capacitance 148,000 µF total
Power consumption 50 W
Dimensions (h x w x d) 68 x 482 x 328 mm (one housing only)
Weight 14 kg

This unit conforms to the EMC interference regulations issued by the EU and to the CE standards.
This unit complies with safety regulation VDE 0860 and therefore with international safety regulation IEC 65.
Technical specifications may be changed by SPHINX without prior notice if technical developments make this
necessary.

SPHINX Project Eight Service Manual

5

5. GENERAL CHECKLIST

This checklist should be used for every pre-amp
received.

To correctly perform the following procedures you
may have to refer to the User Manual for more
detailed information on specific functions.

Note: The pre-amp should be switched on at least
1 hour before performing the checklist procedures!

Serial number and software version

The serial number and software version should
match those mentioned in the documentation as
supplied with every Project Eight.

q Switch off the mains power.
q Press the Standby button.
q Switch the mains on again while holding the

Standby button depressed.

q The display will now show the serial number or

software version.

Input functions

All inputs should be checked for the correct:

q Name
q Boost/Attenuation setting
q Polarity

Channel imbalance

For every position (‘step’) of the volume control the
imbalance between Left and Right should never
exceed +/- 0.1 dB.

Remote Control

Each Remote Control is manually programmed
during manufacturing.
Therefore it is important to check whether all
functions work correctly as mentioned in the User
Manual.
See also Chapter 6.

SPHINX Project Eight Service Manual

6

6. SPHINX REMOTE CONTROL

This single Sphinx Remote Control lets you control
all functions: not only of the Project Eight, but of all
other Sphinx equipment.
Moreover: you may also use it to control other types
of equipment (e.g. TV and VCR) thanks to the
'learn' mode!
Only the following buttons and indications on the
Remote apply to the Project Eight:

Buttons and LED indication

1. LED: As soon as you press a button this LED
will blink green: the Remote is functioning.
When blinking green/red: batteries running low.
When blinking red: change batteries (see
Batteries).

2. STANDBY: Use this button to switch the Project
Eight to stand-by.

3. PRE-AMP: To select the pre-amp. All buttons
pressed hereafter will control only the pre-amp
functions.

4. 1 - 8: To select inputs input 1 to 8 (Note: 9 and 0
have no function).

5. POLARITY: To change the polarity of the
selected input from + to – (as indicated in the
display).

6. SET-UP: To activate the SET-UP mode,
pressing this button has the same effect as
pressing the PRESETS button on the front
panel.

7. PROGRAM - / +: After activating the SET-UP
mode you can change the parameters with
these two buttons: they have the same effect as
the INPUT control on the front panel.

8. : Pressing this button mutes the outputs
(temporarily) and you will not hear any sound.

The display shows "MUTE". Another press on
this button unmutes the outputs.

9. + button: Pressing this big triangular button has
the same effect as rotating the VOLUME control
on the front panel clockwise. You increase the
volume. The VOL value in the display increases
(to max. 99).

10. — button: Pressing this big triangular button
has the same effect as rotating the VOLUME
control on the front panel anti-clockwise. You
decrease the volume. The VOL value in the
display decreases (to min. OFF).

SPHINX Project Eight Service Manual

7

Operation

The Sphinx Remote is used with several different
models and can therefore transmit different control
codes, depending on which model has been
selected with the select buttons (3.).

Important: Always press the PRE-AMP button
before you send a command (even if you only have
one Sphinx component).

Otherwise it is possible that, although the Remote
will send a signal (LED blinks), nothing happens
because the transmitted signal is not 'recognised'
by the component.
Indoors the Remote may be used up to a distance
of 7 meter, provided there is no strong sunlight in
the room and if you aim the Remote at the
component.
Always aim the Remote straight at the front panel of
the component, the maximum offset angle is 30°.

Selecting without switching

Suppose, for instance, that you would like to select
the Tuner to Radio 4 without interrupting CD
playback.
In that case you momentarily depress (not longer
than 0.5 sec) the 'TUNER' button and the '4' button.
The same procedure is used for the other system
components (TV, VCR).
If you depress the select button for longer than 0.5
sec, the system will select a different signal source
(in our example you will then hear the Tuner
playback).

'Learning' the commands

This Sphinx Remote Control is not only pre­programmed for all Sphinx components, but you
can also remotely control your TV and VCR.
The Remote Control is able to 'learn' the
commands from each of the specific remote
controls This will simplify the daily use of your
audio/video system enormously.

The following paragraphs explain how you can
'teach' the Remote Control all those TV- and VCR­specific commands.

1. Place both the Sphinx Remote Control and the
other remote (TV or VCR) flat on a table, facing
each other with a spacing of no more than 2 cm.

Note: Please do not attempt this in direct
sunlight or under strong lighting conditions.

2. Simultaneously press the and TV buttons on
the Sphinx Remote.

The orange LED at the top right-hand of the
Remote will light.

3. Momentarily press the first button on the Sphinx
Remote to be programmed.
The orange LED blinks.

4. Then keep the appropriate button on the other
remote depressed until the LED becomes
green. After releasing the button the LED will
blink orange and you may program the next
button.

5. If the LED is red, repeat steps 3 and 4. If it still
remains red please refer to "Remote does not
'learn".

6. Repeat steps 3 and 4 until all necessary buttons
are programmed.

Note: Do not forget to program the STANDBY
button!
Note: Do not forget to program the TV button
with the "TV-ON"-command!

7. When you are finished press any two buttons on
the Remote to return to Normal mode.
The LED will now be turned off.

Repeat steps 1 to 7 to program the remote for the
VCR (in step 2. you should press the and VCR
buttons). When this is finished your Sphinx Remote
Control is ready for use.
How to operate the Remote Control with the
different Sphinx components is explained in the
corresponding User Manual for each component.

Changing a command

This is done in exactly the same way as described
in the preceding paragraph ‘LEARNING’ THE
COMMANDS, but you now only carry out the
procedure for a certain command and a certain
system component.

Erasing all commands of one component

You may want to erase the commands of one
system component (for instance because you have
bought a new TV).
Simultaneously depress the , Stand-by and

component select button (in our example 'TV'). This
enables the Remote Control to re-'learn' the
commands of the new unit (see also

‘LEARNING’ the commands...).

WARNING!:
If you depress one of the other component
select buttons (than TV or VCR) you will erase
the commands for a Sphinx audio component!
You should only do this if you do not have that
specific Sphinx model, but one of another brand
and want to program the commands of its
remote control.

SPHINX Project Eight Service Manual

8

The LED during Normal mode

• Blinks green: Remote sends a command.

• Blinks green/red: batteries are low, you should
change them within a few days.

• Blinks red: replace batteries immediately.
Replace them within 30 minutes or else all
information in memory will be erased!

The LED during 'Learn' mode

• Indicates orange: Remote is in 'Learn' mode.

• Blinks orange: Remote awaits the command to
be 'learned' from the other remote control.

• Indicates green: the new command has been
'learned'.

• Indicates red: the new command has NOT been
'learned'.

• Blinks for 10 seconds red, yellow and green:
memory full, you cannot program new
commands.

Note: You can still change any commands
already programmed.

Batteries

The two batteries have a life span of approximately
one year during normal use, but shorter when used
more intensely.
Replacement batteries: 1.5 V, model penlite or AAA
(one of these codes is indicated on the packaging
and the batteries). You may also use rechargeable

1.5 V batteries.

Do not leave the battery compartment empty for
more than 30 minutes or else all information in
memory will be erased!

Note: Position the new batteries exactly as shown
in the illustration at the bottom of the battery
compartment, otherwise the memory might be
erased completely!

Other things worth knowing...

The 'advanced user' will understand that you can
program any function for any button! You are
therefore able to custom configure the Remote
Control and use it for several pieces of equipment.
The memory holds a maximum of 120 commands.

Warning: If you don't know exactly what you are
doing, please consult your Sphinx dealer!

Encountering problems...

Remote Control does not work

Wrong component selected Select the correct one
Wrong Remote mode ('Learn'

instead of Normal)

Select correct mode

Wrong command programmed Re-program with Learn

mode

Distance to component
exceeds 7 m

Use Remote at closer
range

Angle between Remote and
component exceeds ±30°

Decrease angle

Sensor window on front dirty Clean window
Batteries empty or incorrectly

placed

Use new batteries or
replace the old ones

correctly
Strong (sun)light in room Shade off light source
Component is not switched on

(!)

Switch it on

Memory erased Re-program completely

Remote Control does not 'learn'

Wrong Remote mode (Normal
instead of 'Learn')

Select correct mode

Distance between two remotes
exceeds 2 cm

Place them closer

together
Signal to be learned is not

infrared

'Learning' only possible

with infrared systems
Sensor window on front dirty Clean window
Batteries in remote(s) empty Use new batteries
Strong (sun)light hits sensor

window

Shade off light source

Component reacts differently than expected or
not at all

Wrong component selected Select the correct one
Wrong command programmed Re-program with Learn

mode
Component or Remote does

not function

Check component with

its original remote
Batteries in remote empty Use new batteries

SPHINX Project Eight Service Manual

9

7. MEASUREMENTS

To properly service the Project Eight you need
some specific measurement equipment and use a
specific set-up.

General set-up

For the correct measurement set-up and hook-up
please refer to the drawing titled “Figure 3:
Connection Diagram for testing the Project Eight” at
page 14.

Necessary Equipment

q 2x millivolt-meter (Ri >1 MΩ)

q 2x non-inductive load resistor 8 Ω / 250 W

q 1x harmonic distortion analyser

(internal distortion <0.0005%, measured
without filters)

q 1x 2-channel oscilloscope

(minimum bandwidth >60 MHz)

q 1x connection unit / switch box

(to connect resistors and amp outputs to
distortion meter)
Note: See drawing 4. for construction details.

q 2x shorting connector

(for balanced pre-amp inputs)

q 2x balanced cable set

(to connect distortion meter, pre-amp and
power amp)

q 1x special top cover plate (preferably

transparent) with holes for adjustment tools
Note: See drawing 5. for construction details.

q A two channel DC-coupled power amplifier

(e.g. Project Eighteen)

Audio signal distortion measurement

Before adjusting the Project Eight please first
measure the total harmonic distortion at the audio
output. The measured value is an indication of the
current state of the Project Eight.

Set-up

For the correct measurement set-up please refer to
figure 3 at page 14.

q Set the oscillator output level to 0.775 V

(0 dBu).

q Adjust the pre-amp volume control so that

output level equals input level (0 dBu).

q THD should now be 0.1% unweighted (or

0.013% IHF-A).

q Now set volume control to maximum (fully

clockwise).

q Increase the oscillator output of the distortion

analyser to set the pre-amp output just before
clipping.

q THD should now be 0.12% unweighted (or

0.005% IHF-A).

SPHINX Project Eight Service Manual

10

8. OUTPUT DC-OFFSET ADJUSTMENT

Proper DC-offset adjustment is very important.

A simple trick will greatly increase the accuracy of
this critical adjustment (see also the drawing titled
“Connection Diagram for testing the Project Eight”
at page 14 ).
By connecting a DC-coupled power amp to the
Project Eight outputs and measuring the offset at
the speaker outputs, the offset is boosted to around
30 times the original value!

Note: We strongly recommend that you use a
power amp with a very low DC-offset, such as the
Project Eighteen.
Note: The pre-amp and the power amp should be
switched on at least 1 hour before performing this
adjustment so they can reach optimum working
temperatures.

Set-up

q Connect a distortion analyser input and a DC

mV-meter to a pre-amp output (or to the power
ampifier). The correct pre-amp output will be
mentioned later.

q Connect the distortion analyser output to a pre-

amp input, the correct input will be mentioned
later.

q Switch off the oscillator of the analyser, this will

short-circuit the pre-amp input.

q Remove the top cover of the Project Eight and

replace it with the special cover plate (with
adjustment holes, see figure 5 at page 16).

Adjustment

For the actual adjustment you may refer to Figure
20 (Main PCB drawing) at page 29 and Figure 7
(Schematic overview of all relevant potentiometers)
at page 17.
In Figure 6 (Schematic operational diagram of
project Eight) at page 16 you will find the placement
of all amps:

Connect the (muted)distortion analyser output to an
unbalanced input of the project eight and select the
correct input at the front panel.
Connect the power amplifier (or, if no power
amplifier is used, the distortion analyser and mV­meter) to the unbalanced output of the project
eight.
The unbalanced signal will only be processed by
disamp A1 & A3 (left channel) and disamp B1 & B3
(right channel). The remaining disamps have no
effect on an unbalanced signal.

q Turn the volume of the project eight to ‘off’. The

offset currently visible on the mV-meter is the
offset of disamp A3(left channel) and/or disamp
B3(right channel).

q This offset can be adjusted by potentiometer

P1 & P2 of disamp A3 for the left channel, and
by potmeter P1 & P2 of disamp B3 for the right
channel.

q Turn the volume of the project eight fully open.

The offset currently visible on the mV-meter is
the offset of disamp A1(left channel) and/or
disamp B1(right channel)

q This offset can be adjusted by potentiometer

P1 & P2 of disamp A1 for the left channel, and
by potmeter P1 & P2 of disamp B1 for the right
channel.

The distortion analyser output must now be
connected to a balanced input of the project eight.
The correct input must also be selected at the front
panel.
The power amplifier (or, if no power amplifier is
used, the distortion analyser and mV-meter ) must
now be connected to a balanced output of the
project eight.
The total offset of all disamps is now visible on the
mV-meter, but since the offset of disamp A1 &
A3(left channel) and disamp B1 & B3(right channel)
has already been adjusted, the offset visible is the
offset of the remaining disamps(A2&A4 and
B2&B4).

Notice: do not commence with the following
procedures before the procedures mentioned
above have been completed.

q Turn the volume of the project eight to ‘off’. The

offset currently visible on the mV-meter is the
offset of disamp A4(left channel) and/or disamp
B4(right channel).

q This offset can be adjusted by potentiometer

P1 & P2 of disamp A4 for the left channel, and
by potmeter P1 & P2 of disamp B4 for the right
channel.

q Turn the volume of the project eight fully open.

The offset currently visible on the mV-meter is
the offset of disamp A2(left channel) and/or
disamp B2(right channel)

q This offset can be adjusted by potentiometer

P1 & P2 of disamp A2 for the left channel, and
by potmeter P1 & P2 of disamp B2 for the right
channel.

Repeat the offset adjustment proceduces a few
times for a perfect adjustment. When this is done,
the offset adjustments are completed

SPHINX Project Eight Service Manual

11

9. PROBLEMS AND SOLUTIONS

At the moment of writing the Project Eight has one
known specific problem.
If in the future you encounter any problem(s) you
may enter the info in this table. This table can then
be used for future reference.

Please also send (by fax or e-mail) the specific
information to the Sphinx International Service
Department (see page 3): this info can then be
added to the general database to aid others.

.

Problem Cause Solution Refer to

page…

Volume control doesn’t work
properly

IC U15, U16, U17 or U18 may
be defective.

Replace the defective one. Page 24

Page 25

SPHINX Project Eight Service Manual

12

10. DIAGRAMS AND PARTS LISTS

The next pages contain the front and rear panel lay­out and a complete set of schematic drawings
including the associated parts lists (if applicable).

Figure 1: Front panel

Figure 2: Rear panel

SPHINX Project Eight Service Manual

13

Index of diagrams and drawings

Page Description
14 Connection Diagram for testing the Project Eight
15 Display Board Schematic Layout
16 Construction Drawing for top cover plate
17 Schematic Operational Diagram Project Eight
18 Schematic Overview of all relevant potentiometers
19 Disamp-96
20 Functional Schematic
21 Left Power Supply
22 Right Power Supply
23 Input/Output
24 Left Volume Control
25 Right Volume Control
26 Left Output Amp
27 Right Output Amp
28 Left Input Amp
29 Right Input Amp
30 Power Supply Unit
31 PCB drawings

SPHINX Project Eight Service Manual

14

Figure 3: Connection Diagram for testing the Project Eight

Right

Left

(+)

(+)

(-)

(-)

Amplfier (30x)

A

B

AMPLIFIER

out1 out2

inp2

inp1

gnd

THD

Amplitude

Frequency

Oscillator

THD out

(+) (-) (+) (-)

Right

Left

(+)

(+)

(-)

(-)

Pre-amplfier (3x)

A

B

(+)

(+)

(-)

(-)

PRE-AMPLIFIER

out1 out2

inp2inp1

Scoop

SWITCH-BOX

x

y

inp2

time/div

inp1

gnd

SPHINX Project Eight Service Manual

15

Figure 4: Display Board Schematic Layout

Xtal10EXtal11MD112MD013NMI14VCC15STBY16GND17P4019P4120P4221P4322P4423P4524P4625P47

26

nc

18

P50

27

P51

28

P52

29

P53

30

P54

31

P55

32

P70

33

P71

34

nc

35

P72

36

P73

37

P74

38

P75/WR

39

P76/RD

40

P77

41

VCC

42

P27

43

RES

9

P66

8

P65

7

P64

6

P63

5

P62

4

P61

3

P60

2

nc

1

P30

61

P31

62

P32

63

P33

64

P34

65

P35

66

P36

67

P37

68

P2644P2545P2446P2347P2248P2149P20

50nc51

GND

52

P1753P1654P1555P1456P1357P1258P1159P10

60

H8

U1

H8/325

VOUT

1

PFI

4

PFO

5

WDI

6

RES

7

VBAT

8

U2
MAX690

U3
8M

VCC

VCC

R1
27K4R210K0

VCC

C1

33p

C2

33p

A -

B +

S1

ENCOD

A ­B +

S2

ENCOD

21

S3

21

S4

21

S5

VCC

C3

220n

V+

2D1

GND

3

IR

IR1
IRIC

R3
5R62R461K9

Input Volume

Standby PresetsPolarity

123456789

101112131415161718

CN1
18PIN

D0D1D2D3D4D5D6

D7

D0D1D2D3D4D5D6

D7

D[0..7]

S0S1S2S3S4S5S6

S0S1S2S3S4

S5

S[0..5]

VCC

EN CL

TO MAINBOARD UCN'S

C4

220n

VCC

123456789

1011121314151617181920

CN2
20PIN

D0D1D2D3D4D5D6

D7

VCC

RES

RES

TO VFD-DISPLAY

VCC

C7

3U3/63V

R5
68K1

CL
EN

CS

1

DI

3

nc

6

DO

4

nc

7

CLK

2

U4
93C46

VCC

+

C8

C47U/16V

+

C9

470U/16V

C5

220n

C6

220n

VCC

J1

J2

D1
1N4148

J3

P65

P65

IR-receiver

J1
J2
J3

JUMPER CLOSED OPEN

X
X

X

NORMAL JUMPER SETTINGS

SPHINX Project Eight Service Manual

16

Figure 5: Construction Drawing for top cover plate

All sizes in millimeters

480

315

34

33

66

48 4848 48

12

216 230

Top View

Front

Back

For holes use drill size of

approx. Ø 6 mm

6 6

Holes use same spacing as the

ones shown below

SPHINX Project Eight Service Manual

17

Figure 6: Schematic Operational Diagram Project Eight

module 5

module 7

module 8

module 1

module 2

module 3

module 4

front

top view

project eight main board

left

right

disamp

disamp
module 6

disamp

disamp disamp

disamp

disamp

disamp

A4

A2

A1A3

B4 B2

B1B3

SPHINX Project Eight Service Manual

18

Figure 7: Schematic Overview of all relevant potentiometers

A3

A1

A4

A2

(+)

(-)

(+) (-)

B3

B1

B4

B2

(+) (-)

(+)

(-)

LEFT

RIGHT

DISAMP DISAMP

DISAMP DISAMP

DISAMP DISAMP

DISAMP DISAMP

(+) (+)

(+)(+)

(+) (+)

(+)(+) (-) (-)

(-)(-)

(-) (-)

(-)(-)

VCC VCC

VCCVCC

VCC VCC

VCC VCCVDD VDD

VDDVDD

VDD

VDD VDD

VDD

P1 P1

P1P1

P1 P2 P1 P2

P2P1P2P1

P2 P2

P2P2

SPHINX Project Eight Service Manual

19

Figure 8: Disamp-96

T9

K389

T10

J109

R31

100R

R26

100R

R27

100R

R28

100R

LD1 LD3

T11

C2240

T7

C2240

T8

A970

T12

A970

R18

2K21

R19

2K21

R20

2K21

R21

2K21

T13

A970

R29

243R

R16

2K21

LD5 LD6

T14

C2240

R23

2K21

R34

33K2

R33

243R

R30

200R

R32

200R

R24

200R

R25

200R

R17

51R0

R11

600R

R22

51R0

R12

600R

T6

C2705

D2

1N4148

D3

1N4148

R13

18R0

R14

18R0

R10

4K75

C3

470pF

AGNDAGND

R15

10R0

C4

47pF

R4

10R0R610R0

R2

243R

R8

243R

R9

100R

R1

100R

R3

51R0

R7

51R0

R5

24R9

P1

50R

T1

A1306

T2

C3298

LD2

C1

47n

C2

47n

1

4

CN2

4PIN

1

4

CN3

4PIN

1

4

CN1

4PIN

1

2

3

4

5

6

7

8

CN4

8PIN

C5

10n

C6

10n

AGND

T4

C2705

T5

A1145

D4

1N4148

D1

1N4148

T3

A1145

P2

50R

LD4

±4mA

±4mA

+24V (+/- 1V)

-24V (+/- 1V)

LED Voltage approx. 1.8V

± 13mA

± 7.5 mA

± 7.5mA

R5 = 2R7 OP INPUT MODULE

+

C11

+

C12

+

C9

25V/47U

+

C10

C25V/47U

+

C7

25V/47U

+

C8

25V/47U

SPHINX Project Eight Service Manual

20

Figure 9: Functional Schematic

L+24V

L-24V

L+38V

L-38V

LEFT CHANNEL PP REG.

P08LPR.SCH

L+24V

L-24V

L+38V

L-38V

R+24V

R-24V

R+38V

R-38V

RIGHT CHANNEL PP REG.

P08RPR.SCH

R+24V

R-24V

R+38V

R-38V

+R-IN

-R-IN

-L-IN

+L-IN

+L-OUT

-L-OUT

+R-OUT

-R-OUT

D[1..16]

CINCH

INPUT/OUTPUT SELECTION LOGIC

P08IO.SCH

+R-IN

-R-IN

-L-IN

+L-IN

+L-OUT

-L-OUT

+R-OUT

-R-OUT

D[1..16]

CINCH

-LV-OUT

+LV-OUT

-LV-IN

+LV-IN

D[1..16]

L. VOL. CONTROL

P08LVC.SCH

-LV-OUT

+LV-OUT

-LV-IN

+LV-IN

D[1..16]

-RV-OUT

+RV-OUT

-RV-IN

+RV-IN

D[1..16]

R. VOL. CONTROL

P08RVC.SCH

-RV-OUT

+RV-OUT

-RV-IN

+RV-IN

D[1..16]

L-24V

L+24V

-LV-OUT

+LV-OUT

-L-OUT

+L-OUT

LEFT DIFF. LINE-AMP

P08LOA.SCH

L-24V

L+24V

-LV-OUT

+LV-OUT

-L-OUT

+L-OUT

R-24V

R+24V

-RV-OUT

+RV-OUT

-R-OUT

+R-OUT

RIGHT DIFF. LINE-AMP

P08ROA.SCH

R-24V

R+24V

-RV-OUT

+RV-OUT

-R-OUT

+R-OUT

L+24V

L-24V

-LV-IN

+LV-IN +L-IN

-L-IN

CINCH

LEFT DIFF. LINE-AMP

P08LIA.SCH

L+24V

L-24V

-LV-IN

+LV-IN +L-IN

-L-IN

CINCH

-RV-IN

+RV-IN

-R-IN

+R-IN

R+24V

R-24V CINCH

RIGHT DIFF. LINE-AMP

P08RIA.SCH

-RV-IN

+RV-IN

-R-IN

+R-IN

R+24V

R-24V CINCH

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

U1

D[1..16]

+24V
+9V

AGND
AGND

AGND
AGND

DGND

SP13

SP15

SP11
SP9

SP10

SP12

SP14

SP16

SP5

SP6

SP7

SP8

SP1
SP2

SP3
SP4

CN1

AGND

6x0.3 Siltech Silver

6x0.3 Siltech Silver

Project Eight Functional Schematic

SPHINX Project Eight Service Manual

21

Figure 10: Left Power Supply

T1

C3298

T4

C3298

T2

C2240

R19

2K00

R8

15R0R91R00

T3

A1306

T6

A1306

T13

A970

R16

332R

LD1

LD RD

R10

1R00

R11

15R0

R20

2K00

T5

A970

T14

C2240

R28

332R

R4

22K1

R5

22K1

LD2

LD RD

D1

1N4004

D2

1N4004

L+38V L-38V

D9

1N4148

D5

1N4004

R18

2K00

U6

LM329DZ

U7

LM329DZ

+

C26

50V/330U

+

C35

50V/330U

+

C36

50V/330U

+

C27

50V/330U

R33

3K32

R37

8K25

R46

1K00

R45

10K0

R47

1K00

R34

3K32

R38

8K25

R48

10K0

3

2

6

7 4

U3

OPA604

R30

2K00

R21

10K0

R17

10K0

D10

1N4148

L+24V L-24V

AGND

C34

22N/PP

C25

22N/PP

C28

22N/PP

C37

22N/PP

C1

330N/PP

C6

330N/PP

+

C13

C50V/330U

+

C16

C50V/330U

C21

330N/PP

C22

330N/PP

+

C33

63V/2200U

+

C38

63V/2200U

R41

1R00

R42

1R00

+

C2

63V/1000U

+

C3

63V/1000U

+

C5

63V/1000U

+

C4

63V/1000U

C14

47N/PP

C15

47N/PP

3

2

6

7 4

U2

OPA604

150..160 mA

150..160 mA

± 6.9V

6.9V

6.9V

± 16V

± 24V

± 33V

* T2 Uce = ±3.7 V

± 3.5 mA

LED voltage approx. 1.8 V

SPHINX Project Eight Service Manual

22

Figure 11: Right Power Supply

T7

C3298

T10

C3298

T8

C2240

R25

2K00

R12

15R0

R13

1R00

T9

A1306

T12

A1306

T15

A970

R22

332R

LD3

LD RD

R14

1R00

R15

15R0

R26

2K00

T11

A970

T16

C2240

R29

332R

R6

22K1

R7

22K1

LD4

LD RD

D3

1N4004

D4

1N4004

R+38V R-38V

3

2

6

7 4

U4

OPA604

D11

1N4148

D7

1N4004

R24

2K00

U8

LM329DZ

U9

LM329DZ

+

C30

50V/330U

+

C41

50V/330U

+

C42

50V/330U

+

C31

C50V/330U

R35

3K32

R39

8K25

R50

1K00

R49

10K0

R51

1K00

R36

3K32

R40

8K25

R52

10K0

3

2

6

7 4

U5

OPA604

R31

2K00

R27

10K0

R23

10K0

D12

1N4148

D8

1N4004

R+24V

R-24V

AGNDAGND

C40

22N/PP

C29

22N/PP

C32

22N/PP

C43

22N/PP

C7

330N/PP

C12

330N/PP

+

C17

50V/330U

+

C20

50V/330U

C23

330N/PP

C24

330N/PP

+

C39

63V/2200U

+

C44

C63V/2200U

R43

1R00

R44

1R00

+

C8

63V/1000U

+

C9

63V/1000U

+

C10

63V/1000U

+

C11

63V/1000U

C18

47N/PP

C19

47N/PP

150..160 mA 150..160 mA

SPHINX Project Eight Service Manual

23

Figure 12: Input/Output

1

3

2

CN24

XLR FEMALE

1

3

2

CN23

XLR FEMALE

1

3

2

CN22

XLR FEMALE

1

3

2

CN21

XLR FEMALE

1

3

2

CN4

XLR MALE

1

3

2

CN3

XLR MALE

1

3

2

CN2

XLR MALE

1

3

2

CN1

XLR MALE

+

RL58

+

RL56

+

RL55

+

RL53

+

RL54

+

RL57

+

RL52

+

RL47

+

RL42

+

RL37

+

RL32

+

RL27

+

RL22

+

RL17

+

RL12

+

RL11

+

RL10

+

RL9

+

RL8

+

RL7

+

RL1

+

RL2

+

RL3

+

RL4

AGND

AGND

1-R1-L2-L 2-R3-R3-L4-L 4-R5-R5-L6-L 6-R7-R7-L8-L 8-R

+

RL6

+

RL5

TAPE OUT

MAIN OUT

MAIN OUT MAIN OUT

L L L LR R R R

-L +L -R +R

AGND

AGND

AGND

AGND

AGND

IN PHASE

OUT PHASE

R1
4k75

R2
4k75

R3
4k75

DGND

CLEAR1STRB2IN13IN24IN35IN46IN57IN68IN79IN810GND

11

COMMON

12

OUT813OUT714OUT615OUT516OUT417OUT318OUT219OUT1

20

Vdd

21

OUT EN

22

U14
UCN5801

CLEAR1STRB2IN13IN24IN35IN46IN57IN68IN79IN810GND

11

COMMON

12

OUT813OUT714OUT615OUT516OUT417OUT318OUT219OUT1

20

Vdd

21

OUT EN

22

U21

UCN5801

1234567891011121314151617

18

U19
18PIN

D1D2D3D4D5D6D7

D8

D1D2D3D4D5D6D7

D8

D1D2D3D4D5D6D7

D8

DGND

DGND

+24V

+24V

+5V+5V

+24V

Vin

1

GND

2

+5V

3

U20

MC7805T

+

C74

50V/330U

+5V

DGND

DGND

+5V

+R-OUT

-R-OUT

+L-OUT

-L-OUT

-L-IN

+L-IN

-R-IN

+R-IN

D[1..16]

DGND

DGND

R53
100K

R32
100K

R62
100K

R69
100K

AGND

AGND

AGND

AGND

CINCH

CN20
CINCH

CN19
CINCH

CN18
CINCH

CN17
CINCH

CN16
CINCH

CN15
CINCH

CN14
CINCH

CN13
CINCH

CN12
CINCH

CN11
CINCH

CN10
CINCH

CN9
CINCH

CN5
CINCH

CN6
CINCH

CN7
CINCH

CN8
CINCH

OPT1
OPTOUT

OPT2
OPTOUT

OPT3
OPTOUT

D[1..16]

D9

D10

D11

D12

D13

D14

D15

D16

D13

D14

D15

D15

D16

D16

S1S2S3S4S5S6CL

OE

C88

100NMKT

C69

100NMKT

C83

100NMKT

+

C93

50V/330U

+9V

R175
33K2

R176
33K2

AGND

AGND

R174
10R0

DGND

AGND

SPHINX Project Eight Service Manual

24

Figure 13: Left Volume Control

+

RL33

R114
5K23

R110
5K23

+

RL28

R106
10K0

R102
10K0

+

RL23

R98
20K0

R94
20K0

+

RL18

R90
39K2

R86
39K2

+

RL13

R82
84K5

R78
84K5

+

RL38

R122
2K61

R118
2K61

+

RL43

R130
1K30

R126
1K30

+

RL48

R138
649R

R134
649R

+

RL14

R83
324R
R79
324R

+

RL19

R91
162R
R87
162R

+

RL24

R99
80R6
R95
80R6

+

RL29

R107
40R2
R103
40R2

+

RL34

R115
20R0
R111
20R0

+

RL39

R123
10R0
R119
10R0

+

RL44

R131
0R00
R127
0R00

+

RL49

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

CLEAR1STRB2IN13IN24IN35IN46IN57IN68IN79IN810GND

11

COMMON

12

OUT813OUT714OUT615OUT516OUT417OUT318OUT219OUT1

20

Vdd

21

OUT EN

22

U15
UCN5801

CLEAR1STRB2IN13IN24IN35IN46IN57IN68IN79IN810GND

11

COMMON

12

OUT813OUT714OUT615OUT516OUT417OUT318OUT219OUT1

20

Vdd

21

OUT EN

22

U16

UCN5801

R142
2K00

R144
2K00

-LV-IN
+LV-IN

-LV-OUT
+LV-OUT

+5V

+5V+24V +24V

DGND DGND

D[1..16]

+24V

DGND DGND

D1D2D3D4D5D6D7

D8

D1D2D3D4D5D6D7

D8

C70
100NMKT

C75
100NMKT

C79
100NMKT

C84
100NMKT

C89
100NMKT

C94
100NMKT

C98
100NMKT

C102
100NMKT

C71
100NMKT

C76
100NMKT

C80
100NMKT

C85
100NMKT

C90
100NMKT

C95
100NMKT

C99
100NMKT

C103
100NMKT

D[1..16]

D9

D10

D15

D16

D15

D16

R145
2K00

R143
2K00

C65

100NMKT

C66

100NMKT

R135
634K

R139
634K

AGND

LSB

MSB

0 / -50 dB

SPHINX Project Eight Service Manual

25

Figure 14: Right Volume Control

+

RL35

R116
5K23

R112
5K23

+

RL30

R108
10K0

R104
10K0

+

RL25

R100
20K0

R96
20K0

+

RL20

R92
39K2

R88
39K2

+

RL15

R84
84K5

R80
84K5

+

RL40

R124
2K61

R120
2K61

+

RL45

R132
1K30

R128
1K30

+

RL50

R140
649R

R136
649R

+

RL16

R85
324R
R81
324R

+

RL21

R93
162R
R89
162R

+

RL26

R101
80R6
R97
80R6

+

RL31

R109
40R2
R105
40R2

+

RL36

R117
20R0
R113
20R0

+

RL41

R125
10R0
R121
10R0

+

RL46

R133
0R00
R129
0R00

+

RL51

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

CLEAR1STRB2IN13IN24IN35IN46IN57IN68IN79IN810GND

11

COMMON

12

OUT813OUT714OUT615OUT516OUT417OUT318OUT219OUT1

20

Vdd

21

OUT EN

22

U17
UCN5801

CLEAR1STRB2IN13IN24IN35IN46IN57IN68IN79IN810GND

11

COMMON

12

OUT813OUT714OUT615OUT516OUT417OUT318OUT219OUT1

20

Vdd

21

OUT EN

22

U18

UCN5801

R146
2K00

R148
2K00

-RV-IN
+RV-IN

-RV-OUT
+RV-OUT

+5V

+5V+24V +24V

DGND

DGND

D[1..16]

+24V

DGND DGND

D1D2D3D4D5D6D7

D8

D1D2D3D4D5D6D7

D8

C72
100NMKT

C77
100NMKT

C81
100NMKT

C86
100NMKT

C91
100NMKT

C96
100NMKT

C100
100NMKT

C104
100NMKT

C73
100NMKT

C78
100NMKT

C82
100NMKT

C87
100NMKT

C105
100NMKT

C101
100NMKT

C97
100NMKT

C92
100NMKT

D[1..16]

D12

D11

D15

D16

D15

D16

R149
2K00

R147
2K00

C67

100NMKT

C68

100NMKT

R137
634K

R141
634K

AGND

1 / -50 dB

MSB

LSB

SPHINX Project Eight Service Manual

26

Figure 15: Left Output Amp

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U10

DISAMPMODULE

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U11

DISAMPMODULE

AGND

+

C52
C63V/2200U

+

C49
C63V/2200U

+

C48
C63V/2200U

+

C45
C63V/2200U

AGND

AGND

AGND

AGND

R54

1R00

R55
1R00

R56
1R00

R57
1R00

L+24V

L-24V

L+24V

L-24V

+L-OUT

-L-OUT

R64
10K0 .1%

R63
10K0 .1%

R67
10K0 .1%

R70
100K

R71
100K

AGND

AGND

R74
2x0.3 zilver

R75
2x0.3 zilver

-LV-OUT

+LV-OUT

AGND

C46
47N/PP

C47
47N/PP

C50
47N/PP

C51
47N/PP

37..40mA

37..40mA

37..40mA

37..40mA

C61
220p

C62
220p

SPHINX Project Eight Service Manual

27

Figure 16: Right Output Amp

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U12

DISAMPMODULE

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U13

DISAMPMODULE

AGND

+ C59

C63V/2200U

+ C60

C63V/2200U

+ C56

C63V/2200U

+ C53

C63V/2200U

AGND

AGND

AGND

AGND

R58

1R00

R59
1R00

R60
1R00

R61
1R00

R+24V

R-24V

R+24V

R-24V

+R-OUT

-R-OUT

R66
10K0 .1%

R65
10K0 .1%

R68
10K0 .1%

R72
100K

R73
100K

AGND

AGND

R76
2x0.3 zilver

R77
2x0.3 zilver

-RV-OUT

+RV-OUT

AGND

C54
47N/PP

C55
47N/PP

C57
47N/PP

C58
47N/PP

37..40mA

37..40mA

37..40mA

37..40mA

C63
220p

C64
220p

SPHINX Project Eight Service Manual

28

Figure 17: Left Input Amp

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U22

DISAMPMODULE

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U23

DISAMPMODULE

AGND

+ C113

C63V/2200U

+ C110

C63V/2200U

+ C109

C63V/2200U

+ C106

C63V/2200U

AGND

AGND

AGND

AGND

R150

1R00

R151
1R00

R152
1R00

R153
1R00

L+24V

L-24V

L+24V

L-24V

+LV-IN

-LV-IN

R160
20K0 .1%

R158
10K0 .1%

R159
10K0 .1%

R166

50K0

R167

50K0

C122
220p

C123
220p

AGND

AGND

R170
1K00

R171
1K00

-L-IN

+L-IN

R161
20K0 .1%

+

RL59

REL16

+24VCINCH

AGND

C107
47N/PP

C108
47N/PP

C111
47N/PP

C112
47N/PP

37..40mA

37..40mA

37..40mA

37..40mA

SPHINX Project Eight Service Manual

29

Figure 18: Right Input Amp

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U24

DISAMPMODULE

4

3

2

1

5
6
7
8

121110

9

171819

20

14

15

16

13

+V

-V

OUT

NFB

U25

DISAMPMODULE

AGND

+ C121

C63V/2200U

+ C118

C63V/2200U

+ C117

C63V/2200U

+ C114

C63V/2200U

AGND

AGND

AGND

AGND

R154

1R00

R155
1R00

R156
1R00

R157
1R00

R+24V

R-24V

R+24V

R-24V

+RV-IN

-RV-IN

R164
20K0 .1%

R162
10K0 .1%

R163
10K0 .1%

R168
50K0

R169
50K0\

C124
220p

C125
220p

AGND

AGND

R172
1K00

R173
1K00

-R-IN

+R-IN

R165
20K0 .1%

+

RL60

REL16

+24VCINCH

AGND

C115
47N/PP

C116
47N/PP

C119
47N/PP

C120
47N/PP

37..40mA

37..40mA

37..40mA

37..40mA

SPHINX Project Eight Service Manual

30

Figure 19: Power Supply Unit

C1

C2

C3

C4

B1

BRIDGE6

C7

C8

C9

C10

B2

BRIDGE6

B5

BRIDGE6

1R

R2

1R

R8

1R

R9

1R

R29

1R

+

C25

C63V/2200U

+

C5

C50V/6800U

+

C11

C50V/6800U

+

C12

C50V/6800U

+

C6

C50V/6800U

R31RR4

1R

R51RR6

1R

R101RR11

1R

R121RR13

1R

VoutVin

GND

U1

7824

C26

C13

C14

C15

C16

B3

BRIDGE6

C19

C20

C21

C22

B4

BRIDGE6

B6

BRIDGE6

R15

1R

R16

1R

R22

1R

R23

1R

R30

1R

+

C28

C63V/2200U

+

C17

C50V/6800U

+

C23

C50V/6800U

+

C24

C50V/6800U

+

C18

C50V/6800U

R171RR18

1R

R191RR20

1R

R241RR25

1R

R261RR27

1R

VoutVin

GND

U2

7809

C29

+9V

+24V

DGND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

CN1

16PIN

+9V

+24V

DGND

+

C27

C50V/330U

+

C30

C50V/330U

R21

10K0

R28

10K0

R14

10K0

R7

10K0

R32

1R

14V

14V

14V

14V

120V

120V

T1

R-CORE 50VA

14V

14V

14V

14V

120V

120V

T2

R-CORE 50VA

PE

PE

14V

14V

14V

14V

120V

120V

T3

R-CORE 50VA

DGND

R33

1R

PE

38..32 Volt

18..15 Volt

R34

10K0

R35

10K0

1

2

3

4

5

CN2

5PIN

PE

SPHINX Project Eight Service Manual

31

Figure 20: PCB drawings

Because there is a significant image-quality loss during the conversion of the drawings, The PCB-drawings are
located in separate files.
These files are in PDF-format (Adobé Acrobat 3.0 Reader)

Project 8 mainboard (A3 format)

“PJ-8A3mainboard.pdf”

Project 8 mainboard (A4 format)

“PJ-8A4mainboard.pdf”

Project 8 Disamp Module (A4 format)

“Pj-8disamp.pdf”

Project 8 Display Module (A4 format)

“Pj-8display.pdf”

Project 8 Power Supply (A4 format)

“Pj-8powersupply.pdf”

SPHINX Project Eight Service Manual

32

Parts List

Designator Part Type Description

B1 BRIDGE6 Bridge rectifier
B2 BRIDGE6 Bridge rectifier
B3 BRIDGE6 Bridge rectifier
B4 BRIDGE6 Bridge rectifier
B5 BRIDGE6 Bridge rectifier
B6 BRIDGE6 Bridge rectifier

C1 100NMKT Capacitor
C1 330N/PP Capacitor
C1 33p Capacitor

C1 47n Capacitor
C10 100NMKT Capacitor
C10 C25V/47U Capacitor
C10 C63V/1000U Capacitor
C100 100NMKT Capacitor
C101 100NMKT Capacitor
C102 100NMKT Capacitor
C103 100NMKT Capacitor
C104 100NMKT Capacitor
C105 100NMKT Capacitor
C106 C63V/2200U Capacitor
C107 47N/PP Capacitor
C108 47N/PP Capacitor
C109 C63V/2200U Capacitor
C11 C25V/47U Capacitor
C11 C50V/6800U Capacitor
C11 C63V/1000U Capacitor
C110 C63V/2200U Capacitor
C111 47N/PP Capacitor
C112 47N/PP Capacitor
C113 C63V/2200U Capacitor
C114 C63V/2200U Capacitor
C115 47N/PP Capacitor
C116 47N/PP Capacitor
C117 C63V/2200U Capacitor
C118 C63V/2200U Capacitor
C119 47N/PP Capacitor
C12 330N/PP Capacitor
C12 C25V/47U Capacitor
C12 C50V/6800U Capacitor
C120 47N/PP Capacitor
C121 C63V/2200U Capacitor
C122 220p Capacitor
C123 220p Capacitor
C124 220p Capacitor
C125 220p Capacitor
C13 100NMKT Capacitor
C13 C50V/330U Capacitor
C14 100NMKT Capacitor
C14 47N/PP Capacitor
C15 100NMKT Capacitor
C15 47N/PP Capacitor
C16 100NMKT Capacitor
C16 C50V/330U Capacitor
C17 C50V/330U Capacitor
C17 C50V/6800U Capacitor
C18 47N/PP Capacitor
C18 C50V/6800U Capacitor
C19 100NMKT Capacitor
C19 47N/PP Capacitor
C2 100NMKT Capacitor
C2 33p Capacitor
C2 47n Capacitor

SPHINX Project Eight Service Manual

33

Designator Part Type Description

C2 C63V/1000U Capacitor
C20 100NMKT Capacitor
C20 C50V/330U Capacitor
C21 100NMKT Capacitor
C21 330N/PP Capacitor
C22 100NMKT Capacitor
C22 330N/PP Capacitor
C23 330N/PP Capacitor
C23 C50V/6800U Capacitor
C24 330N/PP Capacitor
C24 C50V/6800U Capacitor
C25 22N/PP Capacitor
C25 C63V/2200U Capacitor
C26 100NMKT Capacitor
C26 C50V/330U Capacitor
C27 C50V/330U Capacitor
C27 C50V/330U Capacitor
C28 22N/PP Capacitor
C28 C63V/2200U Capacitor
C29 100NMKT Capacitor
C29 22N/PP Capacitor
C3 100NMKT Capacitor
C3 220n Capacitor
C3 470pF Capacitor
C3 C63V/1000U Capacitor
C30 C50V/330U Capacitor
C30 C50V/330U Capacitor
C31 C50V/330U Capacitor
C32 22N/PP Capacitor
C33 C63V/2200U Capacitor
C34 22N/PP Capacitor
C35 C50V/330U Capacitor
C36 C50V/330U Capacitor
C37 22N/PP Capacitor
C38 C63V/2200U Capacitor
C39 C63V/2200U Capacitor
C4 100NMKT Capacitor
C4 220n Capacitor
C4 47pF Capacitor
C4 C63V/1000U Capacitor
C40 22N/PP Capacitor
C41 C50V/330U Capacitor
C42 C50V/330U Capacitor
C43 22N/PP Capacitor
C44 C63V/2200U Capacitor
C45 C63V/2200U Capacitor
C46 47N/PP Capacitor
C47 47N/PP Capacitor
C48 C63V/2200U Capacitor
C49 C63V/2200U Capacitor
C5 10n Capacitor
C5 220n Capacitor
C5 C50V/6800U Capacitor
C5 C63V/1000U Capacitor
C50 47N/PP Capacitor
C51 47N/PP Capacitor
C52 C63V/2200U Capacitor
C53 C63V/2200U Capacitor
C54 47N/PP Capacitor
C55 47N/PP Capacitor
C56 C63V/2200U Capacitor
C57 47N/PP Capacitor
C58 47N/PP Capacitor
C59 C63V/2200U Capacitor
C6 10n Capacitor
C6 220n Capacitor
C6 330N/PP Capacitor
C6 C50V/6800U Capacitor
C60 C63V/2200U Capacitor

SPHINX Project Eight Service Manual

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Designator Part Type Description

C61 220p Capacitor
C62 220p Capacitor
C63 220p Capacitor
C64 220p Capacitor
C65 100NMKT Capacitor
C66 100NMKT Capacitor
C67 100NMKT Capacitor
C68 100NMKT Capacitor
C69 100NMKT Capacitor
C7 100NMKT Capacitor
C7 330N/PP Capacitor
C7 3U3/63V Capacitor
C7 C25V/47U Capacitor
C70 100NMKT Capacitor
C71 100NMKT Capacitor
C72 100NMKT Capacitor
C73 100NMKT Capacitor
C74 C50V/330U Capacitor
C75 100NMKT Capacitor
C76 100NMKT Capacitor
C77 100NMKT Capacitor
C78 100NMKT Capacitor
C79 100NMKT Capacitor

C8 100NMKT Capacitor
C8 C25V/47U Capacitor
C8 C47U/16V Capacitor
C8 C63V/1000U Capacitor
C80 100NMKT Capacitor
C81 100NMKT Capacitor
C82 100NMKT Capacitor
C83 100NMKT Capacitor
C84 100NMKT Capacitor
C85 100NMKT Capacitor
C86 100NMKT Capacitor
C87 100NMKT Capacitor
C88 100NMKT Capacitor
C89 100NMKT Capacitor
C9 100NMKT Capacitor
C9 470U/16V Capacitor
C9 C25V/47U Capacitor
C9 C63V/1000U Capacitor
C90 100NMKT Capacitor
C91 100NMKT Capacitor
C92 100NMKT Capacitor
C93 C50V/330U Capacitor
C94 100NMKT Capacitor
C95 100NMKT Capacitor
C96 100NMKT Capacitor
C97 100NMKT Capacitor
C98 100NMKT Capacitor
C99 100NMKT Capacitor

CN1 16PIN Connector
CN1 18PIN Connector
CN1 4PIN Connector
CN1 KAST_GND Connector
CN1 XLR MALE Connector
CN10 CINCH Connector
CN11 CINCH Connector
CN12 CINCH Connector
CN13 CINCH Connector
CN14 CINCH Connector
CN15 CINCH Connector
CN16 CINCH Connector
CN17 CINCH Connector
CN18 CINCH Connector
CN19 CINCH Connector
CN2 20PIN Connector

SPHINX Project Eight Service Manual

35

Designator Part Type Description

CN2 4PIN Connector
CN2 5PIN Connector
CN2 XLR MALE Connector
CN20 CINCH Connector
CN21 XLR FEMALE Connector
CN22 XLR FEMALE Connector
CN23 XLR FEMALE Connector
CN24 XLR FEMALE Connector
CN3 4PIN Connector
CN3 XLR MALE Connector
CN4 8PIN Connector
CN4 XLR MALE Connector
CN5 CINCH Connector
CN6 CINCH Connector
CN7 CINCH Connector
CN8 CINCH Connector
CN9 CINCH Connector

D1 1N4004 Diode
D1 1N4148 Diode
D1 1N4148 Diode
D10 1N4148 Diode
D11 1N4148 Diode
D12 1N4148 Diode
D2 1N4004 Diode
D2 1N4148 Diode
D3 1N4004 Diode
D3 1N4148 Diode
D4 1N4004 Diode
D4 1N4148 Diode
D5 1N4004 Diode
D6 1N4004 Diode
D7 1N4004 Diode
D8 1N4004 Diode
D9 1N4148 Diode

IR1 IRIC Infrared receiver

J1 Jumper R Jumper
J2 Jumper R Jumper
J3 Jumper R Jumper

LD1 LD RD LED
LD1 LD RD LED
LD2 LD RD LED
LD2 LD RD LED
LD3 LD RD LED
LD3 LD RD LED
LD4 LD RD LED
LD4 LD RD LED
LD5 LD RD LED
LD6 LD RD LED

OPT1 OPTOUT optical output
OPT2 OPTOUT optical output
OPT3 OPTOUT optical output

P1 50R Var. Resistor
P2 50R Var. Resistor

R1 100R Resistor
R1 1R Resistor

SPHINX Project Eight Service Manual

36

Designator Part Type Description

R1 27K4 Resistor
R1 4k75 Resistor
R10 1R Resistor
R10 1R00 Resistor
R10 4K75 Resistor
R100 20K0 Resistor
R101 80R6 Resistor
R102 10K0 Resistor
R103 40R2 Resistor
R104 10K0 Resistor
R105 40R2 Resistor
R106 10K0 Resistor
R107 40R2 Resistor
R108 10K0 Resistor
R109 40R2 Resistor
R11 15R0 Resistor
R11 1R Resistor
R11 600R Resistor
R110 5K23 Resistor
R111 20R0 Resistor
R112 5K23 Resistor
R113 20R0 Resistor
R114 5K23 Resistor
R115 20R0 Resistor
R116 5K23 Resistor
R117 20R0 Resistor
R118 2K61 Resistor
R119 10R0 Resistor
R12 15R0 Resistor
R12 1R Resistor
R12 600R Resistor
R120 2K61 Resistor
R121 10R0 Resistor
R122 2K61 Resistor
R123 10R0 Resistor
R124 2K61 Resistor
R125 10R0 Resistor
R126 1K30 Resistor
R127 0R00 Resistor
R128 1K30 Resistor
R129 0R00 Resistor
R13 18R0 Resistor
R13 1R Resistor
R13 1R00 Resistor
R130 1K30 Resistor
R131 0R00 Resistor
R132 1K30 Resistor
R133 0R00 Resistor
R134 649R Resistor
R135 634K Resistor
R136 649R Resistor
R137 634K Resistor
R138 649R Resistor
R139 634K Resistor
R14 10K0 Resistor
R14 18R0 Resistor
R14 1R00 Resistor
R140 649R Resistor
R141 634K Resistor
R142 2K00 Resistor
R143 2K00 Resistor
R144 2K00 Resistor
R145 2K00 Resistor
R146 2K00 Resistor
R147 2K00 Resistor
R148 2K00 Resistor
R149 2K00 Resistor
R15 10R0 Resistor
R15 15R0 Resistor

SPHINX Project Eight Service Manual

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Designator Part Type Description

R15 1R Resistor
R150 1R00 Resistor
R151 1R00 Resistor
R152 1R00 Resistor
R153 1R00 Resistor
R154 1R00 Resistor
R155 1R00 Resistor
R156 1R00 Resistor
R157 1R00 Resistor
R158 10K0 .1% Resistor
R159 10K0 .1% Resistor
R16 1R Resistor
R16 2K21 Resistor
R16 332R Resistor
R160 20K0 .1% Resistor
R161 20K0 .1% Resistor
R162 10K0 .1% Resistor
R163 10K0 .1% Resistor
R164 20K0 .1% Resistor
R165 20K0 .1% Resistor
R166 50K0 Resistor
R167 50K0 Resistor
R168 50K0 Resistor
R169 50K0 Resistor
R17 10K0 Resistor
R17 1R Resistor
R17 51R0 Resistor
R170 1K00 Resistor
R171 1K00 Resistor
R172 1K00 Resistor
R173 1K00 Resistor
R174 10R0 Resistor
R175 33K2 Resistor
R176 33K2 Resistor
R18 1R Resistor
R18 2K00 Resistor
R18 2K21 Resistor
R19 1R Resistor
R19 2K00 Resistor
R19 2K21 Resistor
R2 10K0 Resistor
R2 1R Resistor
R2 243R Resistor
R2 4k75 Resistor
R20 1R Resistor
R20 2K00 Resistor
R20 2K21 Resistor
R21 10K0 Resistor
R21 10K0 Resistor
R21 2K21 Resistor
R22 1R Resistor
R22 332R Resistor
R22 51R0 Resistor
R23 10K0 Resistor
R23 1R Resistor
R23 2K21 Resistor
R24 1R Resistor
R24 200R Resistor
R24 2K00 Resistor
R25 1R Resistor
R25 200R Resistor
R25 2K00 Resistor
R26 100R Resistor
R26 1R Resistor
R26 2K00 Resistor
R27 100R Resistor
R27 10K0 Resistor
R27 1R Resistor
R28 100R Resistor

SPHINX Project Eight Service Manual

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Designator Part Type Description

R28 10K0 Resistor
R28 332R Resistor
R29 1R Resistor
R29 243R Resistor
R29 332R Resistor
R3 1R Resistor
R3 4k75 Resistor
R3 51R0 Resistor
R3 5R62 Resistor
R30 1R Resistor
R30 200R Resistor
R30 2K00 Resistor
R31 100R Resistor
R31 2K00 Resistor
R32 100K Resistor
R32 1R Resistor
R32 200R Resistor
R33 1R Resistor
R33 243R Resistor
R33 3K32 Resistor
R34 10K0 Resistor
R34 33K2 Resistor
R34 3K32 Resistor
R35 10K0 Resistor
R35 3K32 Resistor
R36 3K32 Resistor
R37 8K25 Resistor
R38 8K25 Resistor
R39 8K25 Resistor
R4 10R0 Resistor
R4 1R Resistor
R4 22K1 Resistor
R4 61K9 Resistor
R40 8K25 Resistor
R41 1R00 Resistor
R42 1R00 Resistor
R43 1R00 Resistor
R44 1R00 Resistor
R45 10K0 Resistor
R46 1K00 Resistor
R47 1K00 Resistor
R48 10K0 Resistor
R49 10K0 Resistor
R5 1R Resistor
R5 22K1 Resistor
R5 24R9 Resistor
R5 68K1 Resistor
R50 1K00 Resistor
R51 1K00 Resistor
R52 10K0 Resistor
R53 100K Resistor
R54 1R00 Resistor
R55 1R00 Resistor
R56 1R00 Resistor
R57 1R00 Resistor
R58 1R00 Resistor
R59 1R00 Resistor
R6 10R0 Resistor
R6 1R Resistor
R6 22K1 Resistor
R60 1R00 Resistor
R61 1R00 Resistor
R62 100K Resistor
R63 10K0 .1% Resistor
R64 10K0 .1% Resistor
R65 10K0 .1% Resistor
R66 10K0 .1% Resistor
R67 10K0 .1% Resistor
R68 10K0 .1% Resistor

SPHINX Project Eight Service Manual

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Designator Part Type Description

R69 100K Resistor
R7 10K0 Resistor
R7 22K1 Resistor
R7 51R0 Resistor
R70 100K Resistor
R71 100K Resistor
R72 100K Resistor
R73 100K Resistor
R74 2x0.3 silver Resistor
R75 2x0.3 zilver Resistor
R76 2x0.3 zilver Resistor
R77 2x0.3 zilver Resistor
R78 84K5 Resistor
R79 324R Resistor
R8 15R0 Resistor
R8 1R Resistor
R8 243R Resistor
R80 84K5 Resistor
R81 324R Resistor
R82 84K5 Resistor
R83 324R Resistor
R84 84K5 Resistor
R85 324R Resistor
R86 39K2 Resistor
R87 162R Resistor
R88 39K2 Resistor
R89 162R Resistor
R9 100R Resistor
R9 1R Resistor
R9 1R00 Resistor
R90 39K2 Resistor
R91 162R Resistor
R92 39K2 Resistor
R93 162R Resistor
R94 20K0 Resistor
R95 80R6 Resistor
R96 20K0 Resistor
R97 80R6 Resistor
R98 20K0 Resistor
R99 80R6 Resistor

RL1 REL16 Relay 24V
RL10 REL16 Relay 24V

RL11 REL16 Relay 24V
RL12 REL16 Relay 24V
RL13 REL16 Relay 24V
RL14 REL16 Relay 24V
RL15 REL16 Relay 24V
RL16 REL16 Relay 24V
RL17 REL16 Relay 24V
RL18 REL16 Relay 24V
RL19 REL16 Relay 24V
RL2 REL16 Relay 24V
RL20 REL16 Relay 24V
RL21 REL16 Relay 24V
RL22 REL16 Relay 24V
RL23 REL16 Relay 24V
RL24 REL16 Relay 24V
RL25 REL16 Relay 24V
RL26 REL16 Relay 24V
RL27 REL16 Relay 24V
RL28 REL16 Relay 24V
RL29 REL16 Relay 24V
RL3 REL16 Relay 24V
RL30 REL16 Relay 24V
RL31 REL16 Relay 24V
RL32 REL16 Relay 24V

SPHINX Project Eight Service Manual

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Designator Part Type Description

RL33 REL16 Relay 24V
RL34 REL16 Relay 24V
RL35 REL16 Relay 24V
RL36 REL16 Relay 24V
RL37 REL16 Relay 24V
RL38 REL16 Relay 24V
RL39 REL16 Relay 24V
RL4 REL16 Relay 24V
RL40 REL16 Relay 24V
RL41 REL16 Relay 24V
RL42 REL16 Relay 24V
RL43 REL16 Relay 24V
RL44 REL16 Relay 24V
RL45 REL16 Relay 24V
RL46 REL16 Relay 24V
RL47 REL16 Relay 24V
RL48 REL16 Relay 24V
RL49 REL16 Relay 24V
RL5 REL16 Relay 24V
RL50 REL16 Relay 24V
RL51 REL16 Relay 24V
RL52 REL16 Relay 24V
RL53 REL16 Relay 24V
RL54 REL16 Relay 24V
RL55 REL16 Relay 24V
RL56 REL16 Relay 24V
RL57 REL16 Relay 24V
RL58 REL16 Relay 24V
RL59 REL16 Relay 24V
RL6 REL16 Relay 24V
RL60 REL16 Relay 24V
RL7 REL16 Relay 24V
RL8 REL16 Relay 24V
RL9 REL16 Relay 24V

S1 ENCOD Encoder
S2 ENCOD Encoder

S3 DRUK-TOETS Switch
S4 DRUK-TOETS Switch
S5 DRUK-TOETS Switch

SP1 SILPAD Soldering pad
SP10 SILPAD Soldering pad
SP11 SILPAD Soldering pad
SP12 SILPAD Soldering pad
SP13 SILPAD Soldering pad
SP14 SILPAD Soldering pad
SP15 SILPAD Soldering pad
SP16 SILPAD Soldering pad
SP2 SILPAD Soldering pad
SP3 SILPAD Soldering pad
SP4 SILPAD Soldering pad
SP5 SILPAD Soldering pad
SP6 SILPAD Soldering pad
SP7 SILPAD Soldering pad
SP8 SILPAD Soldering pad
SP9 SILPAD Soldering pad

T1 R-CORE 50VA Transformer
T2 R-CORE 50VA Transformer
T3 R-CORE 50VA Transformer

T1 A1306 Transistor
T1 C3298 Transistor

SPHINX Project Eight Service Manual

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Designator Part Type Description

T2 C2240 Transistor
T2 C3298 Transistor
T3 A1145 Transistor
T3 A1306 Transistor
T4 C2705 Transistor
T4 C3298 Transistor
T5 A1145 Transistor
T5 A970 Transistor
T6 A1306 Transistor
T6 C2705 Transistor
T7 C2240 Transistor
T7 C3298 Transistor
T8 A970 Transistor
T8 C2240 Transistor
T9 A1306 Transistor
T9 K389 Transistor
T10 C3298 Transistor
T10 J109 Transistor
T11 A970 Transistor
T11 C2240 Transistor
T12 A1306 Transistor
T12 A970 Transistor
T13 A970 Transistor
T13 A970 Transistor
T14 C2240 Transistor
T14 C2240 Transistor
T15 A970 Transistor
T16 C2240 Transistor

U1 7824 Stab. IC
U2 7809 Stab. IC
U20 MC7805T Stab. IC

U1 16PIN Connector

U1 H8/325 Microprocessor
U10 DISAMPMODULE DISCRETE OPAMP MODULE

U11 DISAMPMODULE DISCRETE OPAMP MODULE
U12 DISAMPMODULE DISCRETE OPAMP MODULE
U13 DISAMPMODULE DISCRETE OPAMP MODULE

U14 UCN5801 Driver IC
U15 UCN5801 Driver IC
U16 UCN5801 Driver IC
U17 UCN5801 Driver IC
U18 UCN5801 Driver IC
U21 UCN5801 Driver IC

U19 18PIN Connector

U2 MAX690 Reset IC
U2 OP604 Opamp

U3 OP604 Opamp
U4 OP604 Opamp
U5 OP604 Opamp

U22 DISAMPMODULE DISCRETE OPAMP MODULE
U23 DISAMPMODULE DISCRETE OPAMP MODULE
U24 DISAMPMODULE DISCRETE OPAMP MODULE
U25 DISAMPMODULE DISCRETE OPAMP MODULE

U3 8M X-TAL
U4 93C46 EEPROM

U6 LM329DZ ZENER Diode

SPHINX Project Eight Service Manual

42

Designator Part Type Description

U7 LM329DZ ZENER Diode
U8 LM329DZ ZENER Diode
U9 LM329DZ ZENER Diode

©1998 Audioscript BV
Version: May 13, 1998