SPHINX Project10, Project Ten Service Manual

1.

SERVICE MANUAL

PROJECT TEN

INTEGRATED

STEREO AMPLIFIER

SPHINX Project Ten Service Manual

2

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

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

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

4. THE AMP AT A GLANCE...................................................................................................................4

Front panel................................................................................................................................................... 4

Rear panel ...................................................................................................................................................5

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

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

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

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

Batteries.......................................................................................................................................................7

Encountering problems................................................................................................................................7

6. TECHNICAL SPECIFICATIONS.........................................................................................................8

7. GENERAL CHECKLIST .....................................................................................................................9

Protection modes.........................................................................................................................................9

Short Circuit.............................................................................................................................................9

Standby mode.............................................................................................................................................. 9

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

8. ADJUSTMENT PROCEDURES........................................................................................................10

Bias............................................................................................................................................................10

Offset ......................................................................................................................................................... 11

9. PROBLEMS AND SOLUTIONS .......................................................................................................12

10. DIAGRAMS AND PARTS LISTS ....................................................................................................13

Connection diagram bias adjustment.........................................................................................................14

Connection diagram offset adjustment.......................................................................................................15

Connections main board and display board of Project 10..........................................................................16

General overview Project 10......................................................................................................................17

Project 10 power supply and input selection..............................................................................................18

Project 10 volume board............................................................................................................................19

Project 10 amplifier left ..............................................................................................................................20

Project 10 amplifier right ............................................................................................................................ 21

Project 10 control.......................................................................................................................................22

PCB drawings of Project 10.......................................................................................................................23

Parts list.....................................................................................................................................................24

SPHINX Project Ten Service Manual

3

The Sphinx Project Ten design

The Sphinx Project Ten was designed for the ever­increasing 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 Ten
Integrated Stereo Amplifier

This integrated high-end stereo amplifier is of
exceptional quality. With exception of the balanced
input section, it is of discrete design throughout (no
IC's are used). The pre-amp section is built around
Dual FET's and the amplifier is DC-coupled from
input to output.
The two mono power amps (each channel is totally
independent) use special power transistors with a
power bandwidth of over 20 MHz, a very fast slew
rate and an unsurpassed phase linearity over the
power bandwidth. The amplifiers are therefore very
stable and can effortlessly drive every type and
format of loudspeaker (even the most complex ones
such as electrostatic and magnetostatic...) at
maximum quality.
All internal audio cabling is Siltech pure silver and
the amp outputs are sent to the loudspeaker
connectors via heavy duty, completely sealed gold­plated relays.

To obtain the maximum quality from this integrated
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 Ten 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 Ten in
its original carton.

After unpacking the Project Ten 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 Ten 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 Ten.

SPHINX Project Ten Service Manual

4

4. THE AMP AT A GLANCE

Front panel

1. VOLUME: With this motor-controlled knob you
may adjust the volume of the loudspeakers.
The volume can be controlled manually or via the
optional Remote Control.

2. STANDBY: To switch the component on and off.
When the component is 'off' (standby) this is
indicated by the red LED.
When the component is active the LED will be
green.

3. MUTE: Press this button to temporarily mute the
sound. The red LED will light.

4. CD: To select the CD input.

5. TUNER: To select the TUNER input.

6. LINE 1: To select the LINE 1 input.

7. LINE 2: To select the LINE 2 input (cinch or
balanced).

8. TAPE MON: To select the TAPE IN input.
As soon as you have pressed one of the buttons

5. to 9. the corresponding red LED next to it will
light.

9. PHONES: To connect dynamic stereo
headphones.

1

2

3

4

5
6

9

7

8

SPHINX Project Ten Service Manual

5

Rear panel

11. ON/OFF: This is the mains power switch.

12. Fuse holder: Contains a fuse (3.15 A slow).

13. AC Power: Connect the mains cable to a mains
power outlet (230 - 240 VAC).

14. CONTROL OUT: To connect the optical cable
going to another Sphinx component.

15. RIGHT OUTPUT: To connect the cable from the
right loudspeaker:
red +
white -

16. LEFT OUTPUT: To connect the cable from the
left loudspeaker:
red +
white -

17. Manufacturer's label: This shows important
data for the component, such as serial number
and mains power voltage.

18. BALANCED LINE 2 RIGHT: To connect the
XLR signal cable (balanced cable) from the right
output of the signal source for Input 2.

19. BALANCED LINE 2 LEFT: To connect the XLR
signal cable (balanced cable) from the left
output of the signal source for Input 2.

20. CINCH/BALANCED: This switch is to select the
input connector for LINE 2:
out LINE 2 (cinch)
in BALANCED LINE 2

21. LINE 2: To connect the cinch signal cable from
the signal source for LINE 2.

22. LINE 1: To connect the cinch signal cable from
the signal source for LINE 1.

23. TUNER: To connect the cinch signal cable from
the tuner.

24. CD: To connect the cinch signal cable from the
CD player.

25. TAPE IN: Connect this input to the output of the
recorder.

26. TAPE OUT: Connect this output to the Input of
the recorder..

11

12

13

14

15

16

17 18

19

20

21

22

23

24 25 26

SPHINX Project Ten Service Manual

6

5. SPHINX REMOTE CONTROL

This single Sphinx Remote Control lets you control
all functions: not only of the Project Ten, but of all
other Sphinx equipment.

Only the following buttons and indications on the
Remote apply to the Project Ten (the others will not
function):

Buttons and LED indication

1. PRE-AMP: To select the amp. All buttons
pressed hereafter will only control the amp
functions.
The buttons TUNER and CD will have no effect
on the amp.

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

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

sound. The red LED will be illuminated. Another
press on this button un-mutes the outputs

4. TAPE/MONITOR: Use this button to select the
Tape IN input. Pressing this button has the
same effect as pressing the TAPE button on the
front panel.
Note: The LED of the selected input (see 5.) will
remain illuminated.

5. 1 - 4: To select inputs CD to Line 2 .
1 CD
2 Tuner
3 Line1
4 Line 2

6. ñ button: Pressing this button has the same
effect as clockwise rotating the VOLUME control
on the front panel. You will increase the volume.

7. ò button: Pressing this button has the same
effect as anti-clockwise rotating the VOLUME
control on the front panel. You will decrease the
volume.

SPHINX Project Ten Service Manual

7

Operation

The Sphinx Remote is used for several different
models and can therefore transmit different control
codes, depending on which model has been
selected with the select buttons (1.).

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

If not 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 the 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

How to operate the Remote Control with the
different Sphinx components will be explained in the
corresponding User Manual of each component.

Batteries

The four batteries have a life span of approx. one
year during normal use, but shorter when used
more intensely.
Replacement batteries: 1.5 V, model penlight or
AAA . You may also use rechargeable 1.5 V
batteries.

Note: Position the new batteries exactly as shown in
the illustration at the bottom of the battery
compartment, otherwise the Remote will not
function!

Encountering problems...

Remote Control does not work

Wrong component selected Select the correct one
Distance to component exceeds 7mUse 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
Component is not switched on (!) Switch it on

Component reacts differently than expected or
not at all

Wrong component selected Select the correct one
Component or remote does not

function

Check component

with it's original

remote
Batteries of remote empty Use new batteries

SPHINX Project Ten Service Manual

8

6. TECHNICAL SPECIFICATIONS

Bandwidth 0 - 60,000 Hz (+0/-3 dB with RF input filter)
Phase response error <15° (from 0 - 20,000 Hz)
Gain 21 dB max.
Minimum Power Output (1 - 20.000 Hz)

>2x 80 W into 8 Ω (19.0 dBW), THD <0.01%
>2x 120 W into 4 Ω (20.8 dBW), THD <0.02%

>2x 160 W into 2 Ω (22.0 dBW), THD <0.02%
Output voltage / current, max. 34 V / 20 A
THD+N (IHF-A)

<0.01% (80 W into 8 Ω)
IMD <0.03%
S/N ratio (IHF-A) >106 dB
Channel separation >80 dB (1 - 20,000 Hz)
Slew rate >25 V/µs
Damping factor >200 (1 - 20,000 Hz)

Inputs
XLR, balanced
cinch, unbalanced

1x Line 2

1x Line 2, 1x Line 1, 1x CD, 1x Tuner, 1x Tape
level, nominal

0.15 V (-16.5 dBV) for 60 W into 8 Ω

impedance

20 kΩ (3 kΩ balanced)
Outputs

cinch 1x Tape
level 10 V max. (20 dBV) (1 - 20,000 Hz, THD <0.01%)
headphones 1x 6.3 mm stereo jack, adjustable level
clamp 1x loudspeaker L, 1x loudspeaker R

Supply capacitance 54,400 µF per channel
Power consumption 480 W max. (57.5 W standby)
Dimensions (h x w x d) 110 x 482 x 330 mm
Weight 12 kg

This unit conforms to the EMC interference regulations from the EU and to the CE standards.
This unit complies with safety regulation VDE 0860 and thus with international safety regulation IEC 65.

Technical specifications can be changed by SPHINX without prior notice if technical developments make this
necessary.

©1998 Audioscript BV

SPHINX Project Ten Service Manual

9

7. GENERAL CHECKLIST

Before you test or service the Project Ten please
check the following items. They will give information
about the current status of the amplifier.

Protection modes

The Project Ten has one protection mode.

Short Circuit

If the Left or Right output is shorted, fuse Z1 or Z2
will blow respectively.

Standby mode

The Project Ten will switch to Standby Mode if the:

• Standby button on the front panel or

• Standby button on the Remote is pressed.

In this Mode the following will happen:

• The output relay is switched off.

• The Control Output will be activated (red light).

• The bias current for the Left and Right amplifiers

is reduced to 0 mA thus greatly decreasing the
operating temperature.

Necessary Equipment

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

For the correct measurement set-up and hook-up
please refer to the drawing titled “Connection
Connection diagram… at pages 14 and 15.

q 2x millivolt-meter (Ri >1 MΩ)
q 2x non-inductive load resistor 8 Ω / 100 Watt
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 scope, resistors and amp outputs to
distortion analyser)

q 2x shorting connector

(for balanced pre-amp inputs)

q 2x balanced cable set

(to connect distortion analyser to Project Ten)

SPHINX Project Ten Service Manual

10

8. ADJUSTMENT PROCEDURES

The Project Ten is an integrated amplifier, meaning
the pre-amp and power amp sections are combined
into one cabinet.

The Project Ten only has two parameters for each
channel (so four in total) that might need
adjustment:

- Bias: to set the bias current and bias voltage of
the amplifier for normal use.

- Offset: to set the DC-offset voltage of the
output.

These adjustments might be necessary when the
amplifier has been used for a period of time (and
settings have changed due to ageing) or when a
part of the Project Ten have been replaced.

Attention:

When re-adjusting any setting please ensure that
there is no loudspeaker connected to the output!
Otherwise the loudspeaker may be seriously
damaged.

Attention:

The amplifier is able to generate high output
voltages of over + or -40 V.
Please be very careful during the adjustments!

The Project Ten is a two channel amplifier.
After removing the top cover plate you will see the
Left and Right Channels clearly marked.

The power transistors are mounted underneath the
heatsinks.

Bias

With this procedure you set the proper bias level for
the power transistors. This ensures their Class A
operation at low power levels.

Connect the amplifier according to the drawing
“Connection Diagram Bias Adjustment” (page 14).
The input of the amplifier must be shorted (by way
of the MUTE function of the oscillator).

• Switch the amplifier ON and wait until it has
reached the proper working temperature (this
takes an hour).

• Set the millivolt-meter to the DC-range.

• Place the two measuring clips of the meter

across one of the emitter resistors
Left: R267, R271, R273, R277
Right: R467, R471, R473, R477
(refer to schematic in Pj10main.PDF).
These resistors are positioned to the left of the
power supply condensers.

• The level for each should be 40 mV DC
(±2 mV).
If not: adjust potmeter P202 (Left) or potmeter
P402 (Right) until the level is 40 mV.

• Switch the oscillator on and set it to 1 kHz and a
level of 0 dBu.

• Check the distortion with a THD analyser: it
should be conform the specified values (0.01%
IHF-A @ 1 – 20 kHz @ 80 W into 8 ohm).

• If this is correct the procedure is finished.

• You may now switch off the amplifier or continue

with another adjustment procedure.

SPHINX Project Ten Service Manual

11

Offset

The Offset adjustment procedure minimises the DC
offset value of the amplifier output. This DC offset is
important when capacitive loads are used, such as
electrostatic loudspeakers. These loudspeakers
often use a very low-impedance step-up
transformer. The amplifier ‘sees’ this load as a
short for the DC voltage.

Connect the amplifier according to the drawing
“Connection Diagram Offset Adjustment” (page 15).

The input of the amplifier must be shorted (by way
of the MUTE function of the oscillator)..

• Switch the amplifier ON and wait until it has
reached the proper working temperature (this
takes an hour).

• Set the millivolt-meter to the DC-range.

• Place the measurement clips of the meter over

the output terminal.

• The level should not exceed +5 or -5 mV DC.
If not: adjust potmeter P201 (Left) or P401
(Right) until the level is within this range.

• Switch the oscillator on and set it to 1 kHz and a
level of 0 dBu.

• Check the distortion with a THD analyser: it
should be conform the specified values (0.01%
IHF-A @ 1 - 20 kHz).

• If this is correct the procedure is finished.

• You may now switch off the amplifier or continue

with another adjustment procedure.

Attention:
Do not connect speakers on the Project 10 when
adjusting the offset.

Please be careful during the adjustments!

SPHINX Project Ten Service Manual

12

9. PROBLEMS AND SOLUTIONS

At the moment of writing the Project Ten has no
known specific problems.
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…

Amplifier doesn’t work Fuses are blowed (short circuit

output)

Replace fuses type 3.15A SB Page 18

SPHINX Project Ten Service Manual

13

10. DIAGRAMS AND PARTS LISTS

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

Connection diagram bias adjustment .........................................................................................................14

Connection diagram offset adjustment.......................................................................................................15

Connections main board and display board of Project 10 ..........................................................................16

General overview Project 10 ......................................................................................................................17

Project 10 power supply and input selection ..............................................................................................18

Project 10 volume board.............................................................................................................................19

Project 10 amplifier left...............................................................................................................................20

Project 10 amplifier right............................................................................................................................. 21

Project 10 control .......................................................................................................................................22

PCB drawings of Project 10........................................................................................................................23

Part list .......................................................................................................................................................24

SPHINX Project Ten Service Manual

14

Connection diagram bias adjustment

out1 out2

inp2

inp1

gnd

THD

Amplitude

Frequency

Oscillator

THD out

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

THD ANALYZER

out1 out2

inp2inp1

Scoop

SWITCH-BOX

Right

Left

(+)

(+)

(-)

(-)

Amplfier (30x)

A

B

Project 10

GND

SPHINX Project Ten Service Manual

15

Connection diagram offset adjustment

out1 out2

inp2

inp1

gnd

THD

Amplitude

Frequency

Oscillator

THD out

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

THD ANALYZER

out1 out2

inp2inp1

Scoop

SWITCH-BOX

Right

Left

(+)

(+)

(-)

(-)

Amplfier (30x)

A

B

Project 10

GND

mVmV

GND

SPHINX Project Ten Service Manual

16

Connections main board and display board of Project 10

+12V

+5V

GND

L2

L1

TU
CD
TM

TS

STB

VOL1
VOL2

MU

12V-SW

IN-L

IN-R

PRE-L

PRE-R

+12V

+5V

GND

L2

L1

TU
CD
TM

TS

STB

VOL1
VOL2

MU

12V-SW

IN-L

IN-R

PRE-L

PRE-R

+12V
+5V
GND
L1
L2
TU
CD
TM
TS
STB
MU

VOL1
VOL2

12V-SW

+12V
+5V
GND
L1
L2
TU
CD
TM
TS
STB
MU

VOL1
VOL2

12V-SW

PJ10 main board PJ10 control board

IN-L

IN-R

PRE-L

PRE-R

GND

VOL1
VOL2

IN-L

IN-R

PRE-L

PRE-R

GND

VOL1
VOL2

PJ10 volume board

IN-L
IN-R

PRE-L

PRE-R

GND

+12V

+5V

GND

L1
L2

TU
CD
TM

TS
STB
MU

VOL1
VOL2

+12V

+5V

GND

L1
L2

TU
CD
TM

TS

STB

MU

VOL1
VOL2

12V-SW 12V-SW

VOL1
VOL2

GND

FUSE

MAINS SWITCH

MAINS FILTER

TRANSFORMER

CN103 (RED)

CN104 (YELLOW)
CN105 (BLUE)

CN106 (GRAY)
CN107 (GREEN)

CN108 (PURPLE)

MAINS INLET 33V

33V

14V

IN-L

IN-R

PRE-L

PRE-R

PURPLE

ORANGE

SPHINX Project Ten Service Manual

17

General overview Project 10

PRE-L

+44V
GND

-44V

OUT-L

-15V-L

+15V-L

PRE-L

+44V
GND

-44V

OUT-L

-15V-L

+15V-L

GND

+44V

PRE-R

-44V

OUT-R

-15V

+15V
GND

+44V

PRE-R

-44V

OUT-R

-15V

+15V

+12V

+5V

+44V
GND

-44V

MUTE

STB

TM

L1

CD

L2

TU

OUT-L

OUT-R

MU

+12V

+5V

+44V
GND

-44V

MUTE

STB

TM

L1

CD

L2

TU

OUT-L

OUT-R

MU

+12V
GND

IN-L
IN-R

OUT-L
OUT-R

MUTE

-15V-L
+15V-R

-15V-R

+15V-L

+12V
GND

IN-L
IN-R

OUT-L
OUT-R

MUTE

-15V-L
+15V-R

-15V-R

+15V-L

+12V

+5V

+44V

-44V

GND

STB

PRE-L

OUT-L

PRE-R
OUT-R

-44V

GND

+44V

IN-L

IN-R

OUT-L
OUT-R

TM
CD

L1
L2
TU

+12V
GND

OUT-L
OUT-R

PJ10 left channel PJ10 right channel

PJ10 input/outputPJ10 power supply

+15V-L

-15V-L

+15V-R

-15V-R

+15V-L

-15V-L

+15V-R

-15V-R

MU

MUTE MUTE

+44V
GND

-44V

SPHINX Project Ten Service Manual

18

Project 10 power supply and input selection

Z1

3.15A

Z2

3.15A

B101

B102

+

C109+C110+C111+C112

+

C113+C114+C115+C116

GND

+44V

-44V

8 X 6800U/50V

-44V

GND

+44V

B103

R111
1R00

+

C107
1000U

VoutVin

GND

Q102
7812

C108
100N

+

C106
47U/25V

R103
10K0

R102
10K0

R106
10K0

R105
10K0

R108
100K

R107
100K

R104
22K1

R109
47K5

R101
10K0

R110
33K2

VoutVin

GND

Q101
7805

C102
100N

+

C101
C16V/1U5

T107
BC556

T101
BC546

T105
BC546

T106
BC546

T104
BC546

REL103A
TUNER

REL104A
LINE1

REL105A
LINE2

D105D102 D104D103

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

CN102

18PIN

REL101A
TAPE-MON

D101

REL102A
CD

+

C105
47U/25V

+

C104
330U/50V

+

C103
330U/50V

D106

1N4148

STB

+12V
+5V

MU

MUTE

+12V

+5V

MU

+12V

TS

GND

STB
TM
+5V
CD
+5V
TU

VOL2

L1

VOL1

L2

12V-SW

TM
CD
TU

L1
L2

12

OPTO201B

12

OPTO401B

OPTO101

R112
1K00

OUT-L

OUT-R

35V

8 X 220pF STYROFLEX
125V of 160V
op onderzijde solderen

D101 t/m D106 : 1N4148

GND

+12V

GND

+44V
+12V
+5V
GND

-44V

D107

6V8

12V-SW

CN103

CN104

CN105

CN106

CN107

CN108

T102
BD880

T103
BC517

heatsink

1
2

CN109

+5V

TS

temperature sensor (optional)

REL101B

REL102B

REL103B

REL104B

REL105B

REL101C

REL102C

REL103C

REL104C

REL105CCN112B

CN111A

CN110A

CN112A

CN111B

CN110B

R301 4K75

R501 4K75

R479
1K00

R480
1K00

R481
100R

R280
1K00

R281
100R

R279
1K00

S101A

S101B

2
3

6

74

1

5

IC301

SSM2143
R303
1K50

R304
1K50

R302
100R

+

C302
47u

+

C303
47u

C301
100n

C304
100n

GND

GND

GND

132

CN113
XLR

2
3

6

74

1

5

IC501

SSM2143
R503
1K50

R504
1K50

R502
100R

+

C502
47u

+

C503
47u

C501
100n

C504
100n

GND

GND

132

CN114
XLR

GND

REL106

MAIN-L MAIN-R

GND

D108
1N4148

+12V

MUTE

CN115

GND

OUT-L

OUT-R

to speaker terminals

+15V-R

-15V-R

+15V-R

-15V-R

GND

-15V-L

+15V-L

+15V-L

-15V-L

headphone jack

+15V-L
+15V-R
GND

-15V-L

-15V-R

+12V

+12V

IN-R

IN-L

to volume board

XLR <-> CINCH

OUT-L OUT-R

OUT-R
OUT-L

MUTE

MUTE

SPHINX Project Ten Service Manual

19

Project 10 volume board

M

P801A

solderconnection on volume board

P801B

P801C

solderconnection on main board

PRE-R

PRE-L

IN-R

IN-L

GND

VOL1
VOL2

SPHINX Project Ten Service Manual

20

Project 10 amplifier left

R200
2K21

R201
47K5

R203
2K21

R205
1K50

R207
2K21

R204
1K00

R206
182R

R214
681R

R211
100R

R216
100R

R202
22K1

R209
3K32

R217
10R0

R208
221R

T201
K389

T204

C2240

T202
C2240

T203
C2240

T206
C2240

T208
C2240

T209
C2240

T224
C2240

T219
C2240

T214
C2240

T215
C2240

T220
C2240T216

C2240

C201
330P

LD201

LD202

LD203

GND

T213
A970

T221
A970

T223
A970

T217
A970

T207
A970

T218
A970

T210
A970

T222
A970

T205
A970

C200
220P

C222
47P

C202

22P

GND

GND

R213
100R

R215
100R

R210
10K0

R212
47K5

GND

P201
200

R218
221

R219
47R5

R220
47R5

R221
1K00

R224
10K0

C207
1N

GND

R222
10R0

R231
1K00

R226
1K00

R239
47R5

R236
47R5

R225
10K

R229
221R

R241
1K00

R237
1K00

R233
47R5

R235
1K00

R242
47R5

R232
1K00

R234
1K00

R228
10K

R238
1K00

R230
221R

R240
1K00

R223
10R0

R227
1K00

C203
100N

C204
100N

+

C205
1000U

+

C209

1000U

+

C206
47U

+

C210
47U

+

C212
47U

+

C208
47U

+

C213
47U

+

C211
47U

Z201
16V

LD204

Z202
16V

LD205

C214
330P

C215
330P

R246
47R5

R247
1K82

R265
47K5

T225
A1145

T226
C2705

R249
332R

LD208

LD206

D201

R250
332R

R251
3K92

R255
47R5

R252
4K75

P202
10K

+

C220
10U

54

OPTO201A

SFH601-3

R243
10R

C216

33P

C217
220P

GND

LD207

LD209

R248
95K3

R271
1R0

R267
1R0

R276
10R0

R272
10R0

R275
10K0

R274
10K0

R277
1R0

R263
47R5

R258
47R5

R266
10R0

R269
10K0

R268
10K0

R270
10R0

R260
221R

R254
47R5

R264
221R

R259
221R

R256
6R81

R257
6R81

R261
6R81

R262
6R81

R253
47R5

T233
A1302

T232
A1302

T231
A1306

T229
C3298

T234
C3281

T235
C3281

T227
C3423

T228
A1360

C223

100P

C224

100P

R273
1R0

R278
15R

D202
1N5407

D203
1N5407

C221
100N

GND

GND GND

GND

GND

GNDGND

PRE-L

GND

-44V

+44V

from volume board

to output relay

+44V

-44V

GND

+15V-L

-15V-L

4W

+15V-L

-15V-L

IN-L

OUT-L

IN-L

+44V
+15V-L
GND

-15V-L

-44V

OUT-L

P201
P202

OFFSET
BIAS

POT.METER FUNCTION

OUT-L

T230
BC517

BD901

T212
BD902

SPHINX Project Ten Service Manual

21

Project 10 amplifier right

R400
2K21

R401
47K5

R403
2K21

R405
1K50

R407
2K21

R404
1K00

R406
182R

R414
681R

R411
100R

R416
100R

R402
22K1

R409
3K32

R417
10R0

R408
221R

T401
K389

T404

C2240

T402
C2240

T403
C2240

T406
C2240

T408
C2240

T409
C2240

T424
C2240

T419
C2240

T414
C2240

T415
C2240

T420
C2240T416

C2240

C401
330P

LD401

LD402

LD403

GND

T413
A970

T421
A970

T423
A970

T417
A970

T407
A970

T418
A970

T410
A970

T422
A970

T405
A970

C400
220P

C422
47P

C402

22P

GND

GND

R413
100R

R415
100R

R410
10K0

R412
47K5

GND

P401
200

R418
221

R419
47R5

R420
47R5

R421
1K00

R424
10K0

C407
1N

GND

R422
10R0

R431
1K00

R426
1K00

R439
47R5

R436
47R5

R425
10K

R429
221R

R441
1K00

R437
1K00

R433
47R5

R435
1K00

R442
47R5

R432
1K00

R434
1K00

R428
10K

R438
1K00

R430
221R

R440
1K00

R423
10R0

R427
1K00

C403
100N

C404
100N

+

C405
1000U

+

C409

1000U

+

C406
47U

+

C410
47U

+

C412
47U

+

C408
47U

+

C413
47U

+

C411
47U

Z401
16V

LD404

Z402
16V

LD405

C414
330P

C415
330P

R446
47R5

R447
1K82

R465
47K5

T425
A1145

T426
C2705

R449
332R

LD408

LD406

D401

R450
332R

R451
3K92

R455
47R5

R452
4K75

P402
10K

+

C420
10U

54

OPTO401A

SFH601-3

R443
10R

C416

33P

C417
220P

GND

LD407

LD409

R448
95K3

R471
1R0

R467
1R0

R476
10R0

R472
10R0

R475
10K0

R474
10K0

R477
1R0

R463
47R5

R458
47R5

R466
10R0

R469
10K0

R468
10K0

R470
10R0

R460
221R

R454
47R5

R464
221R

R459
221R

R456
6R81

R457
6R81

R461
6R81

R462
6R81

R453
47R5

T433
A1302

T432
A1302

T431
A1306

T429
C3298

T434
C3281

T435
C3281

T427
C3423

T428
A1360

C423

100P

C424

100P

R473
1R0

R478
15R/4W

D402
1N5407

D403
1N5407

C421
100N

GND

GND GND

GND

GND

GNDGND

PRE-R

GND

OUT-R

-44V

+44V

from volume board

to output relay

+44V

-44V

GND

+15V

-15V

IN-R
OUT-R

+44V
+15V-R
GND

-15V-R

-44V

IN-R

+15V-R

OUT-R

-15VR-

P401
P402

OFFSET
BIAS

POT.METER FUNCTION

T430
BC517

T412
BD902

BD901

SPHINX Project Ten Service Manual

22

Project 10 control

Xtal

10

EXtal

11

MD1

12

MD0

13

NMI

14

VCC

15

STBY

16

GND

17

P40

19

P41

20

P42

21

P43

22

P44

23

P45

24

P46

25

P47

26

nc

18

P5027P5128P5229P5330P5431P5532P7033P7134nc35P7236P7337P7438P75/WR39P76/RD40P7741VCC42P27

43

RES

9

P668P657P646P635P624P613P60

2nc1

P3061P3162P3263P3364P3465P3566P3667P37

68

P26

44

P25

45

P24

46

P23

47

P22

48

P21

49

P20

50

nc

51

GND

52

P17

53

P16

54

P15

55

P14

56

P13

57

P12

58

P11

59

P10

60

H8

U1
H8/325

C1
33p

C2
33p

C3
100n

GND

+5V

+5V

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

CN1

LINE2
VOL1
LINE1
VOL2
TUNER
+5V
CD
+5V
TAPE-MON
STANDBY
GND
GND
GND
+12V-SW
T-SENSOR
+12V LED
+12V LED
MUTE

IN1

1

IN2

2

IN3

3

IN4

4

IN5

5

IN6

6

IN7

7

IN8

8

GND

9

OUT8

11

OUT7

12

OUT6

13

OUT5

14

OUT4

15

OUT3

16

OUT2

17

OUT1

18

K

10

U2
ULN2804

GND

LD3LD7LD2 LD4 LD6LD5

LD1

R2
475R

R3
475R

R4
1K50

R5
475R

R6
1K50

+12V

2 1

S1

standby

2 1

S2

mute

2 1

S3

cd

2 1

S4

tuner

2 1

S5

line1

2 1

S6

line2

2 1

S7

tape-mon

V+

2

D

1

GND

3

IR

IR1
SFH506-38

R7
10R0

R8
47K5

+

C4
47u

+5V

T2
C2240 T3

C2240

T4
A970

T5
A970

GND

+5V

+

U3
TL7757

X1
8MHz

R1
10R0R910R0

C6
100N

GND

R10
100K

J1

JUMPER CLOSED OPEN

SERVICE

NORMAL JUMPER SETTINGS

PJ10

+

C5
100u

GND

+5V
+5V

GND

+12V

VOL2 VOL1

L2

VOL1

L1

VOL2

TU
CD
TM

STB

TS

MU

MU

+5V

GND

+5V

MU
TM
CD

TU
L1
L2

to main board

J1
JUMPER

25V

standby

12V-SW

GND

STB

SPHINX Project Ten Service Manual

23

PCB drawings of Project 10

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

• Pj10main.PDF for Mainboard

• Pj10disl.PDF for Display

SPHINX Project Ten Service Manual

24

Parts list

Designator Part Type Description

B101 BR102 Bridge rectifier
B102 BR102 Bridge rectifier
B103 WO2M Bridge rectifier

C1 33pF Ceramic capacitor
C101 1.5uF/16V Electrolytic capacitor
C102 100nF MKT capacitor
C103 330uF/50V Electrolytic capacitor
C104 330uF/50V Electrolytic capacitor
C105 47uF/25V Electrolytic capacitor
C106 47uF/25V Electrolytic capacitor
C107 1000uF Electrolytic capacitor
C108 100nF MKT capacitor
C109 6800uF/50V Electrolytic capacitor
C110 6800uF/50V Electrolytic capacitor
C111 6800uF/50V Electrolytic capacitor
C112 6800uF/50V Electrolytic capacitor
C113 6800uF/50V Electrolytic capacitor
C114 6800uF/50V Electrolytic capacitor
C115 6800uF/50V Electrolytic capacitor
C116 6800uF/50V Electrolytic capacitor
C2 33pF Ceramic capacitor
C200 220pF Styroflex capacitor
C201 330pF Styroflex capacitor
C202 22pF Ceramic capacitor
C203 100nF MKT capacitor
C204 100nF MKT capacitor
C205 1000uF Electrolytic capacitor
C206 47uF/25V Electrolytic capacitor
C207 1nF MKT capacitor
C208 47uF/25V Electrolytic capacitor
C209 1000uF Electrolytic capacitor
C210 47uF/25V Electrolytic capacitor
C211 47uF/25V Electrolytic capacitor
C212 47uF/25V Electrolytic capacitor
C213 47uF/25V Electrolytic capacitor
C214 330pF Styroflex capacitor
C215 330pF Styroflex capacitor
C216 33pF Styroflex capacitor
C217 220pF Styroflex capacitor
C220 10uF Electrolytic capacitor
C221 100nF MKT capacitor
C222 47pF Styroflex capacitor
C223 100pF Styroflex capacitor
C224 100pF Styroflex capacitor
C3 100nF MKT capacitor
C301 100nF MKT capacitor

SPHINX Project Ten Service Manual

25

Designator Part Type Description

C302 47uF/25V Electrolytic capacitor
C303 47uF/25V Electrolytic capacitor
C304 100nF MKT capacitor
C4 47uF/16V Electrolytic capacitor
C400 220pF Styroflex capacitor
C401 330pF Styroflex capacitor
C402 22pF Ceramic capacitor
C403 100nF MKT capacitor
C404 100nF MKT capacitor
C405 1000uF Electrolytic capacitor
C406 47uF Electrolytic capacitor
C407 1nF MKT capacitor
C408 47uF Electrolytic capacitor
C409 1000uF Electrolytic capacitor
C410 47uF Electrolytic capacitor
C411 47uF Electrolytic capacitor
C412 47uf Electrolytic capacitor
C413 47uF Electrolytic capacitor
C414 330pF Styroflex capacitor
C415 330pF Styroflex capacitor
C416 33pF Styroflex capacitor
C417 220pF Styroflex capacitor
C420 10uF Electrolytic capacitor
C421 100nF MKT capacitor
C422 47pF Styroflex capacitor
C423 100pF Styroflex capacitor
C424 100pF Styroflex capacitor
C5 100uF/25V Electrolytic capacitor
C501 100nF MKT capacitor
C502 47uF Electrolytic capacitor
C503 47uF Electrolytic capacitor
C504 100nF MKT capacitor
C6 100nF MKT capacitor

CN1 18PIN 18 pin connector
CN102 18PIN 18 pin connector
CN103 FASTON Flat-cable connector
CN104 FASTON Flat-cable connector
CN105 FASTON Flat-cable connector
CN106 FASTON Flat-cable connector
CN107 FASTON Flat-cable connector
CN108 FASTON Flat-cable connector
CN110 CINCH2P Cinch connector
CN111 CINCH2P Cinch connector
CN112 CINCH2P Cinch connector
CN113 NC3FPP XLR connector
CN114 NC3FPP XLR connector

D101 1N4148 Diode
D102 1N4148 Diode

SPHINX Project Ten Service Manual

26

Designator Part Type Description

D103 1N4148 Diode
D104 1N4148 Diode
D105 1N4148 Diode
D106 1N4148 Diode
D107 6V8 Zener diode
D108 1N4148 Diode
D202 1N5407 Diode
D203 1N5407 Diode
D402 1N5407 Diode
D403 1N5407 Diode

IC301 SSM2143 IC
IC501 SSM2143 IC

IR1 SFH 506-38 Infrared receiver

J1 Jumper Jumper

LD1 LED red LED red
LD2 LED red LED red
LD201 LED red LED red
LD202 LED red LED red
LD203 LED red LED red
LD204 LED red LED red
LD205 LED red LED red
LD206 LED red LED red
LD207 LED red LED red
LD208 LED red LED red
LD209 LED red LED red
LD3 LED red LED red
LD4 LED red LED red
LD401 LED red LED red
LD402 LED red LED red
LD403 LED red LED red
LD404 LED red LED red
LD405 LED red LED red
LD406 LED red LED red
LD407 LED red LED red
LD408 LED red LED red
LD409 LED red LED red
LD5 LED red LED red
LD6 LED red LED red
LD7 LED red LED red

OPTO101 OPTOUT Optical output
OPTO201 SFH601-3 Opto-coupler
OPTO401 SFH601-3 Opto-coupler

P201 200R Trim pot.
P202 10K Trim pot.

SPHINX Project Ten Service Manual

27

Designator Part Type Description

P401 200R Trim pot.
P402 10K Trim pot.
Q101 L7805CV Voltage stabiliser
Q102 L7812CV Voltage stabiliser

R1 10R0 Resistor MRS25
R10 100K Resistor MRS25
R101 10K0 Resistor MRS25
R102 10K0 Resistor MRS25
R103 10K0 Resistor MRS25
R104 22K1 Resistor MRS25
R105 10K0 Resistor MRS25
R106 10K0 Resistor MRS25
R107 100K Resistor MRS25
R108 100K Resistor MRS25
R109 47K5 Resistor MRS25
R110 33K2 Resistor MRS25
R111 1R00 Resistor MRS25
R112 1K00 Resistor MRS25
R2 475R Resistor MRS25
R200 2K21 Resistor MRS25
R201 47K5 Resistor MRS25
R202 22K1 Resistor MRS25
R203 2K21 Resistor MRS25
R204 1K00 Resistor MRS25
R205 1K50 Resistor MRS25
R206 182R Resistor MRS25
R207 2K21 Resistor MRS25
R208 221R Resistor MRS25
R209 3K32 Resistor MRS25
R210 10K0 Resistor MRS25
R211 100R Resistor MRS25
R212 47K5 Resistor MRS25
R213 100R Resistor MRS25
R214 681R Resistor MRS25
R215 100R Resistor MRS25
R216 100R Resistor MRS25
R217 10R0 Resistor MRS25
R218 221R Resistor MRS25
R219 47R5 Resistor MRS25
R220 47R5 Resistor MRS25
R221 1K00 Resistor MRS25
R222 10R0 Resistor MRS25
R223 10R0 Resistor MRS25
R224 10K0 Resistor MRS25
R225 10K Resistor MRS25
R226 1K00 Resistor MRS25
R227 1K00 Resistor MRS25
R228 10K Resistor MRS25
R229 221R Resistor MRS25

SPHINX Project Ten Service Manual

28

Designator Part Type Description

R230 221R Resistor MRS25
R231 1K00 Resistor MRS25
R232 1K00 Resistor MRS25
R233 47R5 Resistor MRS25
R234 1K00 Resistor MRS25
R235 1K00 Resistor MRS25
R236 47R5 Resistor MRS25
R237 1K00 Resistor MRS25
R238 1K00 Resistor MRS25
R239 47R5 Resistor MRS25
R240 1K00 Resistor MRS25
R241 1K00 Resistor MRS25
R242 47R5 Resistor MRS25
R243 10R Resistor MRS25
R246 47R5 Resistor MRS25
R247 1K82 Resistor MRS25
R248 95K3 Resistor MRS25
R249 332R Resistor MRS25
R250 332R Resistor MRS25
R251 3K92 Resistor MRS25
R252 4K75 Resistor MRS25
R253 47R5 Resistor MRS25
R254 47R5 Resistor MRS25
R255 47R5 Resistor MRS25
R256 6R81 Resistor MRS25
R257 6R81 Resistor MRS25
R258 47R5 Resistor MRS25
R259 221R Resistor MRS25
R260 221R Resistor MRS25
R261 6R81 Resistor MRS25
R262 6R81 Resistor MRS25
R263 47R5 Resistor MRS25
R264 221R Resistor MRS25
R265 47K5 Resistor MRS25
R266 10R0 Resistor MRS25
R267 1R0 Resistor MRS25
R268 10K0 Resistor MRS25
R269 10K0 Resistor MRS25
R270 10R0 Resistor MRS25
R271 1R0 Resistor MRS25
R272 10R0 Resistor MRS25
R273 1R0 Resistor MRS25
R274 10K0 Resistor MRS25
R275 10K0 Resistor MRS25
R276 10R0 Resistor MRS25
R277 1R0 Resistor MRS25
R278 15R Resistor MRS25
R279 1K00 Resistor MRS25
R280 1K00 Resistor MRS25
R281 100R Resistor MRS25

SPHINX Project Ten Service Manual

29

Designator Part Type Description

R3 475R Resistor MRS25
R301 4K75 Resistor MRS25
R302 100R Resistor MRS25
R303 1K50 Resistor MRS25
R304 1K50 Resistor MRS25
R4 1K50 Resistor MRS25
R400 2K21 Resistor MRS25
R401 47K5 Resistor MRS25
R402 22K1 Resistor MRS25
R403 2K21 Resistor MRS25
R404 1K00 Resistor MRS25
R405 1K50 Resistor MRS25
R406 182R Resistor MRS25
R407 2K21 Resistor MRS25
R408 221R Resistor MRS25
R409 3K32 Resistor MRS25
R410 10K0 Resistor MRS25
R411 100R Resistor MRS25
R412 47K5 Resistor MRS25
R413 100R Resistor MRS25
R414 681R Resistor MRS25
R415 100R Resistor MRS25
R416 100R Resistor MRS25
R417 10R0 Resistor MRS25
R418 221R Resistor MRS25
R419 47R5 Resistor MRS25
R420 47R5 Resistor MRS25
R421 1K00 Resistor MRS25
R422 10R0 Resistor MRS25
R423 10R0 Resistor MRS25
R424 10K0 Resistor MRS25
R425 10K Resistor MRS25
R426 1K00 Resistor MRS25
R427 1K00 Resistor MRS25
R428 10K Resistor MRS25
R429 221R Resistor MRS25
R430 221R Resistor MRS25
R431 1K00 Resistor MRS25
R432 1K00 Resistor MRS25
R433 47R5 Resistor MRS25
R434 1K00 Resistor MRS25
R435 1K00 Resistor MRS25
R436 47R5 Resistor MRS25
R437 1K00 Resistor MRS25
R438 1K00 Resistor MRS25
R439 47R5 Resistor MRS25
R440 1K00 Resistor MRS25
R441 1K00 Resistor MRS25
R442 47R5 Resistor MRS25
R443 10R Resistor MRS25

SPHINX Project Ten Service Manual

30

Designator Part Type Description

R446 47R5 Resistor MRS25
R447 1K82 Resistor MRS25
R448 95K3 Resistor MRS25
R449 332R Resistor MRS25
R450 332R Resistor MRS25
R451 3K92 Resistor MRS25
R452 4K75 Resistor MRS25
R453 47R5 Resistor MRS25
R454 47R5 Resistor MRS25
R455 47R5 Resistor MRS25
R456 6R81 Resistor MRS25
R457 6R81 Resistor MRS25
R458 47R5 Resistor MRS25
R459 221R Resistor MRS25
R460 221R Resistor MRS25
R461 6R81 Resistor MRS25
R462 6R81 Resistor MRS25
R463 47R5 Resistor MRS25
R464 221R Resistor MRS25
R465 47K5 Resistor MRS25
R466 10R0 Resistor MRS25
R467 1R0 Resistor MRS25
R468 10K0 Resistor MRS25
R469 10K0 Resistor MRS25
R470 10R0 Resistor MRS25
R471 1R0 Resistor MRS25
R472 10R0 Resistor MRS25
R473 1R0 Resistor MRS25
R474 10K0 Resistor MRS25
R475 10K0 Resistor MRS25
R476 10R0 Resistor MRS25
R477 1R0 Resistor MRS25
R478 15R/4W Resistor MRS25
R479 1K00 Resistor MRS25
R480 1K00 Resistor MRS25
R481 100R Resistor MRS25
R5 475R Resistor MRS25
R501 4K75 Resistor MRS25
R502 100R Resistor MRS25
R503 1K50 Resistor MRS25
R504 1K50 Resistor MRS25
R6 1K50 Resistor MRS25
R7 10R0 Resistor MRS25
R8 47K5 Resistor MRS25
R9 10R0 Resistor MRS25

REL101 Relay Relay
REL102 Relay Relay
REL103 Relay Relay
REL104 Relay Relay

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Designator Part Type Description

REL105 Relay Relay

S1 Switch Switch
S2 Switch Switch
S3 Switch Switch
S4 Switch Switch
S5 Switch Switch
S6 Switch Switch
S7 Switch Switch

T101 BC546 Transistor
T102 BD880 Transistor
T103 BC517 Transistor
T104 BC546 Transistor
T105 BC546 Transistor
T106 BC546 Transistor
T107 BC556 Transistor
T2 T2SC2240 Transistor
T201 K389 DUAL N-JFET
T202 2SC2240 Transistor
T203 2SC2240 Transistor
T204 2SC2240 Transistor
T205 2SA970 Transistor
T206 2SC2240 Transistor
T207 2SA970 Transistor
T208 2SC2240 Transistor
T209 2SC2240 Transistor
T210 2SA970 Transistor
T211 BD901 Transistor
T212 BD902 Transistor
T213 2SA970 Transistor
T214 2SC2240 Transistor
T215 2SC2240 Transistor
T216 2SC2240 Transistor
T217 2SA970 Transistor
T218 2SA970 Transistor
T219 2SC2240 Transistor
T220 2SC2240 Transistor
T221 2SA970 Transistor
T222 2SA970 Transistor
T223 2SA970 Transistor
T224 2SC2240 Transistor
T225 2SA1145 Transistor
T226 2SC2705 Transistor
T227 2SC3423 Transistor
T228 2SA1360 Transistor
T229 2SC3298 Transistor
T230 BC517 Transistor
T231 2SA1306 Transistor
T232 2SA1302 Transistor

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Designator Part Type Description

T233 2SA1302 Transistor
T234 2SC3281 Transistor
T235 2SC3281 Transistor
T3 T2SC2240 Transistor
T4 T2SA970 Transistor
T401 K389 DUAL N-JFET
T402 2SC2240 Transistor
T403 2SC2240 Transistor
T404 2SC2240 Transistor
T405 2SA970 Transistor
T406 2SC2240 Transistor
T407 2SA970 Transistor
T408 2SC2240 Transistor
T409 2SC2240 Transistor
T410 2SA970 Transistor
T411 BD901 Transistor
T412 BD902 Transistor
T413 2SA970 Transistor
T414 2SC2240 Transistor
T415 2SC2240 Transistor
T416 2SC2240 Transistor
T417 2SA970 Transistor
T418 2SA970 Transistor
T419 2SC2240 Transistor
T420 2SC2240 Transistor
T421 2SA970 Transistor
T422 2SA970 Transistor
T423 2SA970 Transistor
T424 2SC2240 Transistor
T425 2SA1145 Transistor
T426 2SC2705 Transistor
T427 2SC3423 Transistor
T428 2SA1360 Transistor
T429 2SC3298 Transistor
T430 BC517 Transistor
T431 2SA1306 Transistor
T432 2SA1302 Transistor
T433 2SA1302 Transistor
T434 2SC3281 Transistor
T435 2SC3281 Transistor
T5 T2SA970 Transistor

U1 H8/325 IC
U2 ULN2804 IC
U3 TL7757 IC

X1 8MHz X-TAL

Z1 T3.15A Fuse
Z2 T3.15A Fuse

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Designator Part Type Description

Z201 16V Zener diode
Z202 16V Zener diode
Z401 16V Zener diode
Z402 16V Zener diode