WTX 500
WTX 500
NEVER COMPROMISE TM
WTX500 Service Manual
Table of Contents
Section 1 Overview Page 3
Section 2 Specifications Page 4
Section 3 Schematic Page 5
Section 4 PC Board Layout Page 6-7
Section 5 Parts List Page 8-11
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WTX500 Service Manual
Section 1
System Overview
At 4.3 lbʼs (less than 2 Kg) the WTX500 is the true original lightweight bass amplifier. Not only is
this little amp easy to transport, but with a maximum power output of 500W at 4Ω, this amplifier
is more than capable of holding its own in a live band situation. So while the rest of the band
struggles to set their gear up and drag flight cases in from the van, you can simply take the
WTX500 out from your gig bag and either plug into a cabinet or use the DI output and go
straight into the front of house!
1 2 3 4 5 6 7 8 9
11
10 12 13 14 15 16
1. Eden Logo - Illuminates to indicate that power is applied and the unit is switched on.
2. Gain - Controls the preamp level of your amplifier. Pull to activate the Pad circuit.
3. Set Level LED - Indicates when the auto-compressor would be active if not bypassed.
4. Enhance - Eden tailored EQ modifier, adjust this to shape your overall EQ. Pull to bypass the
internal compressor circuit.
5. Bass - Use this control to select the amount of cut or boost you require in the low frequency
range. Pull to engage the Bass Boost circuit to acheive added low end.
6. Mid - Use this control to select the amount of cut or boost you require in the low frequency
range. Pull to select where the mid frequency range will be cut or boosted.
7. High - Use this control to select the amount of cut or boost you require in the low frequency
range. Pull to move the DI send to the post EQ setting.
8. Limit LED - Indicates when the amplifier has reached it’s maximum output.
9. Master - Controls the overall level of your amplifier.
10. Input - Connect your instrument here.
11. Mute - Press to activate the mute circuit. The LED illuminates when the mute circuit is active.
12. Send - Take your signal for an external processor or effects chain here.
13. Return - Return your signal for an external processor or effects chain here.
14. Aux L - Input your left auxiliary input signal here.
15. Aux R - Input your right auxiliary input signal here.
16. Tuner - Connect your rack or pedal tuner here.
NEVER COMPROMISE TM 3
WTX500 Service Manual
Section 2
Specifications
Below Tests conditions: Input 1KHz Square wave, controls all centered except the control being tested.
NEVER COMPROMISE TM 4
1 2 3 4 5 6 7 8
+15V P7H P7
Q6 J174 N/C N/C VR1A
1 1
+15V W10K
2 2 40
CR2 3 3
1N4148 CR3 VR5 SW
4 4
+15V CR1 1N4148
Header 4H
R100 Gain R22 R99
1N4148 VR1 C15 150pF 3M3 S6 LED10
3K9 100K
3 C4 C6 W100K -15V Mute Mute
-15V 1 + R8 + R18 C11 + 2u2F R25 R31 68K R188
1
2
A 2 A
33K 10K 68K 6K8
40
P100H U1A 2u2F R9 2u2F C7 CR4 C13A
P100 TL072 R6 11K R12 Q5 2 820pF -15V S1
1
2
3
4
5
100K 10K J112 R26 1 6 P3 Grnd Lift
1
2
33pF 1N4148 Enhance 18K R28 3
VR1 SW 6 R23 VR2 18K U2A
Pad 7 W100K TL072 P3H
1
2
3
4
5
6
LED13K3 40 K1 R27
5 Header 6H
Q1 U1B 27K
P1H TL072 C12
1
2
3
4
J112
LEDF100 Header 4H C10 + 10uF 4n7F
R10 R13 Q7 C33
CR8 R54
P1 MPSA06 C13 +
1
2
3
4
1M 2K7
22nF
1N4148 680R
C1 R21 CR5 10uF R56
Input + R4 R11 R7 R16 R19 100K R52 100K
Tip 1M 150R 1K 10K -15V R29 3
2K2 1N4148 R51 12K
2u2F 27K 1 6 C32
Ring C9 10nF 2 7 R53 +
12K
R1 C2 R4A C31 U4A 5 680R
Sleeve 1Meg 470pF 1Meg Q4 -15V 22pF TL072 U4B 10uF R55
JK1 MPSA56 TL072 100K
C14 R30 +15V
Q2 R17 R20 C8 2n0F 100K
MPSA56 1K 10K 10nF R3A 56R Phones Enable Q1A
C3 R14 R15 +15V Tip J174 R6A
Tuner Out + R5 Q3 P2H P2 Footswitch +
R4B 56R 22K
B 330K 3K3 C2A B
Tip MPSA56 Tip Ring
1K 3 3 47uF
10uF -15V C5
+
+
1 1 47uF
1Meg VR2 SW J2A 47K
Sleeve Comp On/Off Header 3 Sleeve R2A
JK3 J5A 270R
P102
1
2
3
4
R93 22K
5
C18 27nF R42 12K
R47 Tip 6
C53 47pF
7
C24 47pF 15K
C22 Ring 8
2 C17 Bass
6
5
4
3
2
1
+
2
40
U8A 1uF VR3 4u7F Q8 3 7 J3A 7815 P6H
3
R92 TL072 W100K C21 MPSA56 U3A 1uF 100nF 5 Outputs 100nF 100nF
6
5
4
3
2
1
R43 Tip 4
Power Module
40
W10K 5 1N4148 Sleeve GND -15V
C19 U8B R44 R76 100K 7915 C45 +15V
+
1K C25 180K J4A
R94 R96 2n2F TL072 390K 100nF 100nF +
R91 0.47uF
47K 12K CR6 R38 C23 R36 C40 68pF C44
1N4148 1K 10uF 2K4 R69 18K CR15 R86 10uF 10uF
C 220K C
+
+
Q99 R35
U2B C38 1K
J174 8K2 C37 68pF R73 6 C41 1N4148 R84
+
C26
+
C54 -15V R41 7 + R80 3 R85
0.47uF 18K R82 12K
40
10nF VR5 10K VR3 SW 2 2u2F 5 1 6 1K
8K2
W100K 1 Q10 U6B 10uF 2 12K 7
3 J112 TL072 U7A 5
Treble R90 U6A VR7 TL072 U7B
R97 C55 R95 +15V 8K2 TL072 20K TL072
12K 4n7F 47K R71 -15V
R198
1Meg R87
Q98 100K R70 Q14
J174 VR4 SW C30 P5H P5 150R R78 R81 MPSA56
D98 R199 R49 2K7
+ R72 Q12 10K Q13 100K
1 1
10K 1K 1Meg MPSA56 MPSA56
1N4148 2 2 C51 R83
10uF C50
C198 3 3 3u3F C42
+ 3K3
+
40 R88
C35 +15V 10K 2u2F MPSA56
Left Aux In + R60 Send 12K
Tip R68 Tip +15V +15V -15V VR6
47K
10uF CR11 10K +15V W100K R89
Ring R59 1N4148 Ring R50 51K
1Meg U5B 1Meg CR9 MODEL : WTX500 Version : 1
Sleeve 5 TL072 Sleeve 1N4148 R69A
D J4 7 J2 U5A 270R 2W D
6 R57 3 TL072 Drawn : DH
C36 CR12 1 P8
TITLE : Preamp Section
R61 R66 22K Checked : DH
Right Aux In + 1N4148 ReturnC34+ 10uF 2
+
Tip Tip 2
47K 10K CR10 C56 To Fan
R65 1
10uF R64 1N4148 1000uF
Ring R62 -15V 10K Ring 35V
PN : 5301.028 Sheet 1 of 1
10K
1Meg R58 R63
Sleeve Sleeve 1Meg -15V 10K
J5 J3 -15V
Tar PN : Printed 01/04/2013
WTX500 Service Manual
1 2 3 4 5 6 7 8
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WTX500 Service Manual
Section 4
Preamp PC Board Layout
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WTX500 Service Manual
Section 4
Preamp PC Board Layout
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WTX500 Service Manual
MODEL: WTX500 PARTS LIST
Item # Part no. Material Name Specifications Qty Unit Remark
1 KITS-70022 Button EG1195-ND 2 PCS
24 KITS-70365 Screw, Tapping English 3.5*9BM 2 PCS Used to mount the XLR jack.
39 1-01-001517 Resistor, Carbon Film 56! 1/2 Watt ±5% 2 PCS R3,4
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WTX500 Service Manual
MODEL: WTX500 PARTS LIST
Item # Part no. Material Name Specifications Qty Unit Remark
41 KITS-70186 Capacitor, Ceramic 0.01uF 1Kvdc +80/-20% 1 PCS C1
48 KITS-70051 Resistor, Carbon Film 150! 1/4 Watt ±5% 2 PCS R7,70
49 KITS-70056 Resistor, Carbon Film 680! 1/4 Watt ±5% 1 PCS R24
50 KITS-70058 Resistor, Carbon Film 1K! 1/4 Watt ±5% 6 PCS R16,17,37,38,85,86
51 1-01-000706 Resistor, Carbon Film 2.4K! 1/4 Watt ±5% 1 PCS R36
52 KITS-70064 Resistor, Carbon Film 2.7K! 1/4 Watt ±5% 2 PCS R13,87
53 KITS-70065 Resistor, Carbon Film 3.3K! 1/4 Watt ±5% 6 PCS R15,23,46,74,77,83
54 KITS-70070 Resistor, Carbon Film 6.8K! 1/4 Watt ±5% 1 PCS R45
55 KITS-70071 Resistor, Carbon Film 8.2K! 1/4 Watt ±5% 4 PCS R35,79,80,90
56 KITS-70072 Resistor, Carbon Film 10K! 1/4 Watt ±5% 7 PCS R12,18,19,20,41,78,R199
57 KITS-70073 Resistor, Carbon Film 12K! 1/4 Watt ±5% 6 PCS R42,82,84,88,96,97
58 KITS-70075 Resistor, Carbon Film 15K! 1/4 Watt ±5% 3 PCS R32,34,47
59 KITS-70076 Resistor, Carbon Film 18K! 1/4 Watt ±5% 4 PCS R26,28,69,73
60 KITS-70078 Resistor, Carbon Film 22K! 1/4 Watt ±5% 4 PCS R39,40,93,92
61 KITS-70080 Resistor, Carbon Film 27K! 1/4 Watt ±5% 2 PCS R27,29
63 KITS-70083 Resistor, Carbon Film 47K! 1/4 Watt ±5% 3 PCS R43,94,95
64 1-01-000736 Resistor, Carbon Film 51K! 1/4 Watt ±5% 1 PCS R89
65 KITS-70084 Resistor, Carbon Film 56K! 1/4 Watt ±5% 1 PCS R33
66 KITS-70085 Resistor, Carbon Film 68K! 1/4 Watt ±5% 2 PCS R25,31
67 KITS-70087 Resistor, Carbon Film 100K! 1/4 Watt ±5% 7 PCS R6,21,22,30,76,81,R198
68 KITS-70090 Resistor, Carbon Film 180K! 1/4 Watt ±5% 1 PCS R48
69 KITS-70092 Resistor, Carbon Film 220K! 1/4 Watt ±5% 1 PCS R91
70 KITS-70093 Resistor, Carbon Film 330K! 1/4 Watt ±5% 2 PCS R14,75
71 KITS-70094 Resistor, Carbon Film 390K! 1/4 Watt ±5% 1 PCS R44
72 KITS-70097 Resistor, Carbon Film 1Meg! 1/4 Watt ±5% 5 PCS R4A,10,11,71,72
73 KITS-70105 Resistor, Carbon Film 3.9K! 1/2 Watt ±5% 1 PCS R100
NEVER COMPROMISE TM 9
WTX500 Service Manual
MODEL: WTX500 PARTS LIST
Item # Part no. Material Name Specifications Qty Unit Remark
80 KITS-70166 Capacitor, Electrolytic 0.47uF 50vdc ±20% 5!*11mm 2 PCS C25,26
90 KITS-70196 Capacitor, Metalized Film 0.1uF 250vdc ±10% P=10 MER 1 PCS C9
118 KITS-70056 Resistor, Carbon Film 680# 1/4 Watt ±5% 2 PCS R53,54
NEVER COMPROMISE TM 10
WTX500 Service Manual
MODEL: WTX500 PARTS LIST
Item # Part no. Material Name Specifications Qty Unit Remark
119 KITS-70058 Resistor, Carbon Film 1K! 1/4 Watt ±5% 2 PCS R5,49
120 KITS-70065 Resistor, Carbon Film 3.3K! 1/4 Watt ±5% 2 PCS R1A,R4
121 KITS-70070 Resistor, Carbon Film 6.8K! 1/4 Watt ±5% 1 PCS R188
122 KITS-70072 Resistor, Carbon Film 10K! 1/4 Watt ±5% 6 PCS R63,64,65,66,67,68
123 KITS-70073 Resistor, Carbon Film 12K! 1/4 Watt ±5% 2 PCS R51,52
124 KITS-70078 Resistor, Carbon Film 22K! 1/4 Watt ±5% 2 PCS R6,57
125 KITS-70083 Resistor, Carbon Film 47K! 1/4 Watt ±5% 3 PCS R7,60,61
126 KITS-70087 Resistor, Carbon Film 100K! 1/4 Watt ±5% 2 PCS R55,56
127 KITS-70097 Resistor, Carbon Film 1Meg! 1/4 Watt ±5% 7 PCS R1,2,50,58,59,62,98
128 1-01-000766 Resistor, Carbon Film 3.3Meg! 1/4 Watt ±5% 1 PCS R99
129 KITS-70158 Capacitor, Electrolytic NP 10uF 100vdc ±20% 8"*12mm 7 PCS C3,30,32,33,34,35,36
131 KITS-70165 Capacitor, Electrolytic 1000uF 35vdc ±20% 13#*21mm 1 PCS C56
133 KITS-70169 Capacitor, Electrolytic 3.3uF 50vdc ±20% 5#*11mm 1 PCS C50
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