Velleman K4040 User manual

Total solder points: 700
Difficulty level:
beginner 1o2o3o4o5þadvanced
ILLUSTRATED PARTLIST H4040IP-ED1
K4040
STEREO VALVE POWER AMPLIFIER
⇒Pure valve sound with high quality EL34 valves
⇒High quality black and chrome housing
⇒Chrome valve socket covers
⇒Easy bias adjustment with LED indication
⇒Removable bottom for easy access and service
⇒High quality capacitors and components
⇒Gold plated input and speaker terminals
⇒Standby function
⇒Soft start circuit for power transformer
Specifications
•2 x 90Wrms in 4 or 8Ω
•Up to 2 x 15Wrms full class A
•Bandwidth: 8Hz to 80KHz (-3dB/1W)
•Harmonic distortion: 0.1% @ 1W/1KHz
•Signal to noise ratio: >105dB (A weighted)
•Input sensitivity: 1Vrms
•115VAC or 230VAC / 500VA max.
modifications reserved
stereopoweramplifier
4040

5%
4K7= ( 4 - 7 - 2 - B )
1%
4K7= ( 4 - 7 - 0 - 1 - 1 )
COLOR= 2… 5
IPESF SDK NDGB FNL
C
O
D
E
CODICE
COLORE
CODIGO
DE
CORES
CODIGO
DE
COLORES
VÄRI
KOODI FÄRG
SCHEMA
FARVE
KODE FARGE KODE FARB KODE COLOUR
CODE CODIFI-
CATION
DES
COU-
LEURS
KLEUR
KODE
C
O
D
E
0
Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart 0
1
Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin 1
2
Rosso Encarnado Rojo Punainen Röd Rød Rød Rot Red Rouge Rood 2
3
Aranciato Laranja Naranjado Oranssi Orange Orange Orange Orange Orange Orange Oranje
3
4
Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel 4
5
Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen 5
6
Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw 6
7
Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars 7
8
Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs 8
9
Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit 9
A
Argento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver A
B
Oro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud B

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3
VELLEMAN KIT NV
Legen Heirweg 33
9890 Gavere
Belgium
http://www.velleman.be

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4
STEREO VALVE AMPLIFIER
TECHNICAL DATA*
•Output power:
2 X 0 to 15 Wrms class A
2 x 15 to 90 Wrms class AB
•Output impedance 4 or 8 Ohms
•Ultra linear output transformers
•Switch-on delay, to protect the output tubes: approx. 1 minute
•Standby circuit
•Built-in bias current indicator
•Switch-on delay for the supply transformer: 0.5s
•Power bandwidth: 15 -40kHz (-3dB, ref 50W)
•Frequency range: 8 Hz -80kHz (-3dB, ref 1W)
•Harmonic distortion:
0.1% (1 kHz/1W)
0.7% (1 kHz/90W)
•Signal/noise ratio: > 105dB (A weighted wrt 90W)
•Channel isolation (75dB wrt 90W)
•Input impedance: 34Kohm
•Input sensitivity (1Vrms) for 90W
•Damping factor (100Hz): > 10
*We reserve the right to make changes.
ASSEMBLY STEPS
Required tools to assemble the kit:
Use a small soldering iron of max. 40W.
Use thin (1mm) solder, do not use any flux.
Use a small cutter to trim the excess wires.
1.
2.
3.
4.
Mount the components
against the PCB surface
and carefully solder the
leads in place.
Obtain cone-shaped, shiny
soldered joints by heating
the component leads suffi-
ciently.
This solder joint re-
sults in a bad con-
nection.
Trim the excess
wires up to the level
of the solder
•Careless assembly will certainly lead to problems.
•Insert the part, oriented correctly, into its correct holes on the PCB.
•Mount the components in the correct order as stated in this manual.
•The component values in the circuit diagram are for reference only. The values in this parts list are
correct and must be followed.
•Use the boxes qto check off your progress.
FBefore starting to build, read also the general guidelines

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5
Assembly of the small input PCB P4040i:
This PCB is used to connect the input signal (via two RCA sockets) via two holes at the rear of the cabi-
net.
1. CAPACITORS
C...
qC1: 47nF (473, 0.047)
2. CINCH / RCA CONNECTOR
Mount them as straight and square as possible
against the PCB
qSK1: CINCH
qSK2: CINCH
3. SHIELDED WIRE CONNECTION
Carefully strip the screened cable supplied and
make the connection as shown in the figure
15cm
LEFT
RIGHT
GND
GND
P4040i
qL
qR
qGND
qGND

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6
15mm M3 SPACER
8mm SPACER
PCB
VALVE SOCKET
15mm M3 BOLT
Assembly of the main PCB P4040B:
Foreword:
Because of the PCB dimensions, first mount the 8 large tube sockets so that the PCB can rest on a ta-
ble, without the component leads being touched.
When mounting the components, it is best to fold back the component leads a little before turning the
PCB over to solder them.
1. VALVE SOCKET MOUNTING
Check the position of the notch in the centre of the tube socket, it must correspond to the notch in the
circle printed on the PCB. Connect the leads to the corresponding isle on the PCB using a small piece of
jumper wire.
IMPORTANT:
Make the connection exactly as shown in the figure, otherwise the small piece of wire could touch the
bottom of the cabinet.
2
3
41
3
5
7
4
6
58
1
8
qV1: I.O.
qV2: I.O.
qV3: I.O.
qV4: I.O.
qV5: I.O.
qV6: I.O.
qV7: I.O.
qV8: I.O.
Also mount a 15 mm spacer on the remaining holes in
the PCB (at the solder side), use a 6 mm M3 bolt:
•Two spacers round tube sockets V9 and V10
•A spacer next to RY3
•A spacer next to T2
•A spacer next to R1
•A spacer next to SW1, together with a lock
washer at the solder side:
6mm M3 BOLT
M3 LOCK WASHER
15mm M3 SPACER
2 7
1
8
5
4
3
V...
Connect the valve socket terminals 1, 3, 4, 5, and 8 to
the corresponding points at the solder side of the PCB.
Use a piece of jumpwire but take care that the connec-
tion does not come above the spacer, otherwise, the wire
could touch the housing later (see drawing above).

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7
2. JUMPERS
qJ1 (mount 2 wires)
qJ2 (mount 2 wires)
qJ3 (mount 2 wires)
qJ4 (mount 2 wires)
qJ5 (mount 2 wires)
qJ6 (mount 2 wires)
qJ7
qJ8
qJ9
qJ10
qJ11
qJ12
qJ13
qJ14
qJ15
qJ16
qJ17
qJ18
qJ19
qJ20
qJ21
qJ22
qJ23
qJ24
qJ25
qJ26
3. JUMPERS FOR VOLTAGE
SELECTION
MAINS VOLTAGE SELECTION:
For 100V mains input, mount:
AA
For 120V mains input, mount:
BB
For 230V mains input, mount:
C
C
For 240V mains input, mount:
D D
REMARK:
Strike out the NOT used mains voltage indica-
tion at the back of the housing !! e.g. cross out
with a permanent black marker
4. DIODES (Check the polarity!)
Note that from J1 to J6, two jumper leads have
to be mounted in the same hole.
TIP
In order to get nice straight wiring, without too
much folding and measuring, follow these
hints:
•Mount the lead on the PCB as it is.
•Solder 1 end of the lead.
•Then carefully pull on the free end of the
lead until it is straight.
•Now solder the other end.

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8
D...
CATHODE
qD1: 1N4148
qD2 :1N4148
qD3: 1N4007
qD4: 1N4007
qD5: 1N4007
qD6: 1N4007
qD7: 1N4007
qD8: 1N4007
qD9: 1N4007
qD10: 1N4007
qD11: 1N5408 not on tape !
qD12: 1N5408 not on tape !
qD13: 1N5408 not on tape !
qD14: 1N5408 not on tape !
qD15: 1N4148
qD16: 1N4148
qD17: 1N4007
qD18: 1N4148
qD19: 1N4007
qD20: 1N4007
qD21: 1N4007
qD22: 1N4148
qD23: 1N4148
qD24: 1N4148
qD25: 1N4148
qD26: 1N4007
5. ZENER DIODES
(Check the polarity!)
ZD...
CATHODE
qZD1: 3V9
qZD2: 3V9
6. ¼W RESISTORS
R...
qR1: 1K (1 -0 -2 -B)
qR2: 1K (1 -0 -2 -B)
qR3: 470 (4 -7 -1 -B)
qR4: 1K (1 -0 -2 -B)
qR5: 22K (2 -2 -3 -B)
qR6: 220K (2 -2 -4 -B)
qR7: 2K2 (2 -2 -2 -B)
qR8: 2K2 (2 -2 -2 -B)
qR9: 220K (2 -2 -4 -B)
qR10: 22K (2 -2 -3 -B)
qR11: 12K (1 -2 -3 -B)
qR12: 33K (3 -3 -3 -B)
qR13: 33K (3 -3 -3 -B)
qR16: 12K (1 -2 -3 -B)
qR17: 820K (8 -2 -4 -B)
qR18: 820 (8 -2 -1 -B)
qR19: 180 (1 -8 -1 -B)
qR20: 1M (1 -0 -5 -B)
qR21: 22K (2 -2 -3 -B)
qR22: 3K9 (3 -9 -2 -B)

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qR23: 820K (8 -2 -4 -B)
qR24: 820 (8 -2 -1 -B)
qR25: 180 (1 -8 -1 -B)
qR26: 1M (1 -0 -5 -B)
qR27: 22K (2 -2 -3 -B)
qR28: 3K9 (3 -9 -2 -B)
qR29: 10K (1 -0 -3 -B)
qR30: 10K (1 -0 -3 -B)
qR31: 10K (1 -0 -3 -B)
qR32: 10K (1 -0 -3 -B)
qR33: 10K (1 -0 -3 -B)
qR34: 10K (1 -0 -3 -B)
qR35: 1K5 (1 -5 -2 -B)
qR36: 1K5 (1 -5 -2 -B)
qR37: 560 (5 -6 -1 -B)
qR38: 10K (1 -0 -3 -B)
qR39: 220K (2 -2 -4 -B)
qR40: 100K (1 -0 -4 -B)
qR41: 220K (2 -2 -4 -B)
qR42: 100K (1 -0 -4 -B)
qR43: 220K (2 -2 -4 -B)
qR44: 100K (1 -0 -4 -B)
qR45: 220K (2 -2 -4 -B)
qR46: 100K (1 -0 -4 -B)
qR47: 1K5 (1 -5 -2 -B)
qR48: 33K (3 -3 -3 -B)
qR49: 12K (1 -2 -3 -B)
qR50: 220K (2 -2 -4 -B)
qR51: 10K (1 -0 -3 -B)
qR52: 100K (1 -0 -4 -B)
qR53: 220K (2 -2 -4 -B)
qR54: 100K (1 -0 -4 -B)
qR55: 220K (2 -2 -4 -B)
qR56: 100K (1 -0 -4 -B)
qR57: 220K (2 -2 -4 -B)
qR58: 100K (1 -0 -4 -B)
7. 1/2W RESISTORS
R...
qR59: 100K (1 -0 -4 -B -9)
qR60: 100K (1 -0 -4 -B -9)
qR61: 47K (4 -7 -3 -B -9)
qR62: 47K (4 -7 -3 -B -9)
qR63: 220 (2 -2 -1 -B -9)
qR64: 220 (2 -2 -1 -B -9)
qR65: 820 (8 -2 -1 -B -9)
qR66: 220 (2 -2 -1 -B -9)
qR67: 220 (2 -2 -1 -B -9)
qR68: 820 (8 -2 -1 -B -9)
qR69: 330K (3 -3 -4 -B -9)
qR70: 330K (3 -3 -4 -B -9)
qR71: 330K (3 -3 -4 -B -9)
qR72: 330K (3 -3 -4 -B -9)
qR73: 330K (3 -3 -4 -B -9)
qR74: 330K (3 -3 -4 -B -9)
qR75: 330K (3 -3 -4 -B -9)
qR76: 330K (3 -3 -4 -B -9)

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10
8. 1W RESISTORS
R...
2mm
qR77: 270 (2 -7 -1 -B)
qR78: 10K (1 -0 -3 -B)
qR79: 10K (1 -0 -3 -B)
qR80: 15K (1 -5 -3 -B)
qR81: 680K (6 -8 -4 -B)
qR82: 15K (1 -5 -3 -B)
qR83: 47K (4 -7 -3 -B)
qR84: 47K (4 -7 -3 -B)
qR85: 390K (3 -9 -4 -B)
qR86: 47K (4 -7 -3 -B)
qR87: 47K (4 -7 -3 -B)
qR88: 390K (3 -9 -4 -B)
qR89: 180 (1 -8 -1 -B)
qR90: 180 (1 -8 -1 -B)
qR91: 180 (1 -8 -1 -B)
qR92: 180 (1 -8 -1 -B)
qR93: 180 (1 -8 -1 -B)
qR94: 180 (1 -8 -1 -B)
qR95: 180 (1 -8 -1 -B)
qR96: 180 (1 -8 -1 -B)
qR97: 10 (1 -0 -0 -B)
qR98: 10 (1 -0 -0 -B)
qR99: 10 (1 -0 -0 -B)
qR100: 10 (1 -0 -0 -B)
qR101: 10 (1 -0 -0 -B)
qR102: 10 (1 -0 -0 -B)
qR103: 10 (1 -0 -0 -B)
qR104: 10 (1 -0 -0 -B)
9. LEDs (Check the polarity!)
LD...
COLOR = 2...5
CATHODE
qLD1: 5mm red blinking
qLD2: 3mm bicolor:
Carefully check the assembly of this LED:
12
LD...
2
3
13
5mm
5mm
LD2 ONLY !
qLD3: 3mm RED
qLD4: 3mm RED
qLD5: 3mm RED
qLD6: 3mm RED
qLD7: 3mm GREEN
qLD8: 3mm GREEN
qLD9: 3mm RED
qLD10: 3mm RED
qLD11: 3mm RED
qLD12: 3mm RED

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11
10. IC SOCKETS
(Check the position of the notch!)
IC...
1
qIC1: 18P
11. REED RELAYS
(Check the position of the notch!)
PIN 1
1
RY...
qRY1: VR05R121
qRV2: VR05R121
12. RESISTOR TRIMMERS,
vertical type
RV...
qRV1: 100K
qRV2: 100K
qRV3: 100K
qRV4: 100K
qRV5: 100K
qRV6: 100K
qRV7: 100K
qRV8: 100K
13. TRANSISTORS
T...
T...
T...
T...
qT1: BC547C
qT2: BC547C
qT3: BC547C
qT4: BC516

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12
14. 5W RESISTORS
R...
2mm
REMARK: You will have two 8.2 Ohm 5W resis-
tors left over for later use.
qR105: 15
qR106: 15
qR107: 15
qR108: 15
15. DIP SWITCHES
1
SW...
Check that switch 1 corresponds to pin 1.
qSW2: DS-4P
qSW3: DS-4P
16. CAPACITORS
C...
Check the minimum voltage !
qC3: 100p/400V
qC4: 100p/400V
qC5: 22n/630V (0.022)
qC6: 22n/630V (0.022)
qC7: 470n (0.47, 474)
qC8: 2n2 (222, 2200)
qC9: 22n/630V (0.022)
qC10: 100p/400V
qC11: 22n/630V (0.022)
qC12: 22n/630V (0.022)
qC13: 22n/630V (0.022)
qC14: 22n/630V (0.022)
qC15: 22n/630V (0.022)
qC16: 2n2 (222, 2200)
qC17: 470n (0.47, 474)
qC18: 100p/400V (101)
qC19: 22n/630V (0.022)
qC20: 22n/630V (0.022)
qC21: 22n/630V (0.022)
qC22: 22n/630V (0.022)

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13
17. ELECTROLYTIC CAPACITOR
(Check the polarity!)
C...
qC23: 4u7
qC24: 100u
qC25: 470u
qC26: 470u
qC27: 470u
qC28: 470u
qC29: 47u/100V
qC30: 100u/100V
qC31: 47u/100V
qC32: 47u
qC33: 47u
qC34: 100u
18. PCB CONNECTOR
With the holes facing the PCB edge !
qSK3: 2 POLE
qSK4: 2 POLE
qSK5: 3 POLE
qSK6: 8 POLE
qSK7: 8 POLE
qSK8: 8 POLE
19. VALVE SOCKET
59
8
7
4
3
2
V...
61
Mount them square against the PCB
qV9: B9A
qV10: B9A
qV11: B9A

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14
20. POWER RELAYS
The various relays have leads that correspond
to the printing on the PCB:
qRY3: VR5V122C
RY...
qRY4: VR10V121C
qRY5: VR10V121C
RY...
21. FUSE HOLDER
F...
qF1
Insert a 5A fuse for 115V
Insert a 2.5A fuse for 230V
Fit the protective cap to the fuse holder.
22. TRANSFORMER
TRAFO...
qTR1: 12VAC

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15
23. ELECTROLYTIC CAPACITOR
(Check the polarity!)
Generally these capacitors are from the snap-in
type and cannot be mounted incorrectly.
C...
qC35: 22u/350V
qC36: 22u/350V
qC37: 100u/400V
qC38: 100u/400V
qC39: 220u/450V
qC40: 220u/450V
qC41: 220u/450V
qC42: 220u/450V
24. SWITCH
SW...
SIDE VIEW
IMPORTANT:
Don't leave a gap between
the SWITCH and the PCB!
Mount him as square as possible against the
PCB, also solder the metal support.
qSW1: 3P ON-ON-ON
25. INSERT THE IC
(Check the position of the notch!)
IC...
PIN 1
1
qIC1: LM3914

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16
26 6.3V VALVE WIRING
Wiring for the 8 tube sockets V1 to V8. Use twisted brown wire for each one. For safety, it is advisable
to check with an ohmmeter that the two 6.3V terminals are not short circuited.
VIEWED FROM SOLDERSIDE
3
4
5
4
3
56
V8
8
1
2
7
18
81
V5
8
1
7
2
6
5
4
5
3
3
4
4
3
3
4
5
5
6
V7
1
8
218
781
8
1
7
5
6
4
5
V6
23
3
4
f2 6.3VAC
f2 f1
f1
5
3
4
4
5
3
1
2
8
V4
67
1
82
8
8
1
1
6
7
5
4
V1
3
3
5
4
6.3VAC
5
3
4
4
5
32
1
8
1
6
V3
78
f2
f2
8
8
1
6
7
5
4
1
V2
23
3
5
4
f1
f1
Again thoroughly check all the components for miss mounting (polarity!) , includ-
ing soldering errors !!
Assembly into the cabinet:
•Mount the cage nuts into the square holes
concerned, from the inside to the outside,
(with the nut along the inside). These nuts
are used to fasten the covers down, and
there are 7 of them in the cabinet base.
CLICK INTO HOLE
FIG 1

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17
•Mount the input PCB on the right-hand side of the housing
as shown in the figure. It is possible that a masking sticker
from the cabinet will have to be removed, so that one of
the supporting bushes can make contact with the cabinet.
•Mount the chrome feet at the four corners of the cabinet
using an M4 bolt. A piece of felt can be sticked under each
foot.
•Mount the loudspeaker terminals (repeat twice):
Mount the three loudspeaker terminals on the triangular
PCB plate (see figure), the connecting eyes should not be used.
M3 NUT
M3 LOCK WASHER
LS TERMINAL
NUT LS TERMINAL
PCB SUPPORT
NUT LS TERMINAL
HOUSING (REAR)
16mm M3 BUTTON HEAD BOLT
FIG 3
Check that the solder side of the PCB, is along the side of the nuts.
Solder a 35 cm length of yellow wire to the 4 Ohm connection (YEL).
Solder a 35 cm length of red wire to the 0 connection (RED).
HINT: In order to tighten the nuts well, immobilise the loudspeaker terminal by inserting a screwdriver
through the hole for the loudspeaker lead.
•Fit the unit onto the housing with three black Allen bolts, fix with a shakeproof washer and nut.
IMPORTANT: The loudspeaker terminals must NOT touch the metal cabinet anywhere.
•Mount the mains voltage connector to the housing using two black Allen bolts.
16mm M3 BUTTON HEAD BOLT
5mm SPACER
M3 NUT
M3 LOCK WASHER
FIG 2

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18
•Solder a 12 cm length of blue wire to the N terminal of the mains connector.
•Solder a 12 cm length of brown wire to the L terminal of the mains connector.
•Solder a 20 cm length of yellow/green earth wire and a 12 cm length to the middle terminal of the
mains connector.
Slide a 1.5 cm length of insulating heat shrink sleeve over each terminal all the way up the connector.
This can be shrunken by hot air (e.g. with a hair dryer).
IMPORTANT: Stick a piece of insulating foil on the connector, see figure. This will later be used to
prevent the connector piercing through the transformer.
Also stick a piece of insulating foil on the inside edge of the cabinet above each place where a
transformer has to be put (see fig. 6).
ADHESIVE PROTECTION FOIL AND WIRING
FIG 4
•Mount the ring core transformers:
PLATE
RUBBER WASHER
TRANSFORMER
RUBBER WASHER
METAL CASE
BOLT
FIG 5
◊Stick a adhesive foot to the base of the cabinet, in the middle where each transformer has to be
put.
◊Mount an output transformer on the left-hand side of the housing, see figure. Check the position of
the leads.
cut
4 X 4 cm

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19
OUTPUT
TRANSFORMER
ZD043 TRANSFORMER
8D002
POWER TRANSFORMER
ZD043
OUTPUT
WIRES WIRES
WIRES
WIRES
ADHESIVE
FOOT FOOT
ADHESIVE
FOOT
ADHESIVE
WIRES
ADHESIVE
PROTECTION
FOIL
PROTECTION
FOIL
ADHESIVE PROTECTION
FOIL
ADHESIVE
FIG 6
◊Turn over the housing and solder the transformer leads to the output terminals, see figure.
4
0
8
BLUE
YELLOW
RED
HEAT-SHRINK
SLEEVE
FIG 7
Do not forget to insert a 3 cm length of insulating heat shrink sleeve over the wires:
Solder the double yellow wire to the 4 Ohm loudspeaker terminal.
Solder the red wire to the 0 loudspeaker terminal.
Solder the blue wire to the 8 Ohm loudspeaker terminal.
IMPORTANT: Heat the terminals up until the solder melts easily. Then slide the insulating heat
shrink sleeve over the leads.
◊Twist the previously soldered red and yellow wires together and fit them as shown in the figure, the
cable ties supplied can also be used.
OUTPUT TRANSFORMER
ZD043
YELLOW
RED
BLUE
8 40
ZD043
OUTPUT TRANSFORMER
BLUE
RED
YELLOW
804
FIG 8

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20
◊Mount the supply transformer in the middle of the cabinet. Ensure that the leads are positioned as
shown in the figure 6. The thick grey and green wires must be at the highest point.
◊Mount an output transformer along the right-hand side of the housing, see figure 6. Check the po-
sition of the wires.
◊Solder the transformer leads to the output terminals, see figure 7. Do not forget to slide a 3 cm
length of insulating heat shrink sleeve over the wires:
◊Solder the double yellow wire to the 4 Ohm loudspeaker terminal.
Solder to the red wire to the 0 loudspeaker terminal.
Solder the blue wire to the 8 Ohm loudspeaker terminal.
IMPORTANT: Heat the terminals until the solder melts easily. Then slide the insulating heat
shrink sleeve over the leads.
!
IMPORTANT: Ensure that the transformers do not touch any metal parts such as the loudspeaker
terminals or the input connector.
Assembly and wiring:
Fit the main PCB into the housing and screw it down with the black Allen bolts along the underside.
Connect the mains lead to the screw connector, MAINS, with the blue wire to the N terminal and the
brown wire to the L terminal. The short earth wire is connected to the EARTH connector.
Connection of the transformers:
!
IMPORTANT: The connector leads of the transformer may not be shortened. If there is more than
one wire in an insulating sleeve, then they MUST be soldered together, and only then connected to the
screw connector.
Connect the left-hand output transformer to the left-hand connector, SK7, and the right-hand output
transformer to the right-hand connector, SK8. The twisted yellow and red wires must also be connected
to the proper connector. See fig. 9
GREEN
VIOLET
YELLOW LS+
BROWN
BLACK
BLACK
RED LS-
ORANGE
OUTPUT TRANSFORMER
ZD043
YELLOW
RED
BLUE
8 40
BROWN
ORANGE
RED LS-
BLACK
BLACK
GREEN
VIOLET
YELLOW LS+
ZD043
OUTPUT TRANSFORMER
BLUE
RED
YELLOW
8 0 4
FIG 9
Connect the leads of the supply transformer to the screw connector, SK6.