AML
“Spanner
”
logo
on this side
T
ighten up all the screws
Solder the assembly
to the main PCB
T
ransformer silk screen
print on this side
Solder the right angle pin headers
to the circuit boards - the longer pin
goes through the PCB - trim of
f the
excess pin (PL8 is 8-way
, PL6 is
10-way)
Fit the transformer ensuring that
Pins 2 to 6 are at the bottom
Pins 7 to 1
1 are at the top
ie Pin 2 is nearest to the
“PL6
”
on the PCB
Remove the 2 original brass screws from
the end of the transformer which has
the pins. (do not discard)
Fit the assembly into the main PCB
and then tighten up the screws -
but not too tightly !!
Remove the assembly again and then
solder the transformer to its PCB
On the end of the transformer which has
pins, fit an M3 nylon washer between the
PCB and the transformer (this is to stop the
PCB bending when screwed down).
Fit loosely using the longer (6BA
x 1/4 in)
steel screws
On the end of the transformer without pins
fit shakeproof washers onto the original
brass screws
Fit the screws loosely
Input Transformer Assembly and Fitting
Original brass screws
Longer steel screws
Fit the transformer (VTB9045) to the 2
PCB
’
s as shown in the daigram.
Input
T
ransformer
PCB 1
Input
T
ransformer
PCB 2
Summary of Contents for ez1081pre
Page 1: ...ez1081pre Mic Amplifier Assembly manual Colourbook Issue 1...
Page 3: ...Revision 1 initial release ez1081pre Colourbook revision history...
Page 5: ...D2 D3 D7 D8 1N4148 4 D5 D9 D10 D11 1N4007 4 D4 D6 BAT46 2 Diodes...
Page 6: ...R61 1R0 1 R59 R60 1R5 2 R62 2R2 1 R50 R58 10R 2 Resistors...
Page 7: ...R33 47R 1 R7 82R 1 R6 R24 100R 2 R10 R35 R53 R65 150R 4 Resistors...
Page 8: ...R11 300R 1 R46 R49 R54 470R 3 R63 750R 1 R12 R34 R37 R39 R41 R52 R55 560R 7 Resistors...
Page 9: ...R8 1k1 1 R1 1k2 1 R2 R3 1k5 2 R13 1k3 1 Resistors...
Page 10: ...R9 2k0 1 R38 R42 2k2 2 R17 2k4 1 Resistors R22 R29 2K7 2...
Page 11: ...R44 3k9 1 R16 4k3 1 R26 5k1 1 R15 R21 R23 7k5 3 Resistors...
Page 12: ...R25 R40 R47 R57 R64 10k 5 R18 12k 1 R14 13k 1 R43 R45 15k 2 Resistors...
Page 13: ...R32 18k 1 R19 22k 1 R30 36k 1 Resistors...
Page 14: ...R20 R27 R31 R36 R56 47k 5 R48 56k 1 Resistors R4 R5 6k81 0 1 2...
Page 15: ...C8 C29 47pF 2 C27 68pF 1 Ceramic Capacitors C7 C13 100pF 2...
Page 17: ...C15 470pF 1 C1 1n2F 1 Film Capacitors C32 4n7F 1...
Page 18: ...C14 C21 10nF 2 C25 100nF 1 Film Capacitors and Relay C26 330nF 1 RL1 24 Volt DPCO relay 1...
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Page 42: ......