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Morley SLDW issues (Schematic traced)

PostPosted: 23 Dec 2017, 16:48
by Manfred
I friend of mine gave me a Morley SLDW for repair.
I found that the original schematic do not corresponds with the circuit,
it was therefore necessary to trace the circuit.
One more LED-LDR combination in real circuit and a somewhat different wiring identified.
The owner cannot rember if the pedal had been modified sometime in the past.
In the original schematic 7812 voltage regulator is shown, in the real circuit it is jumpered.
Likewise the power supply is 18 Volts DC in the schematic drawing, in the circuit it is 9 Volts DC,
but the resistors in seriell to the LEDs are the same as at 18 Volts.
The pedal do not works fine.
My impression is that the brightness of the LEDs are to faint.
Who knows more about the pedal?

Original Schematic:
morley-sldw-distortion-wah-schematic.pdf

Traced Schematic:
SLDW_ReddrawnSchematic.JPG

Shots:
morleySLDW.jpg

morleySLDW_2.jpg

Re: Morley SLDW issues (Schematic traced)

PostPosted: 17 Mar 2019, 01:02
by Manfred
I dropped the pedal for a long time, then I started the repair a few days ago.
Now, it is finished an works fine, with a DC-jack (pin negative).
The pedal works not fine using 9VDC power supply voltage, so I add a voltage doubler and the 12Volts voltage regualtor.
I choosed this TDA2003 voltage doubler to ensure a sufficient current.
SLDW PSU-Mod Schematic.JPG

SLDW_ModShot1.jpg

SLDW_ModShot2.jpg

TDA2003VoltageDoublerICwired.jpg

TDA2003VoltageDoublerICwiredCopper.jpg

Here two another Vero-layouts with mounted ICs(Pentawatt H and Pentawatt V)
TDA2003VoltageDoublerIPentawattH.jpg

TDA2003VoltageDoublerIPentawattH_Copper.jpg

TDA2003VoltageDoublerIPentawattV.jpg

TDA2003VoltageDoublerIPentawattV_Copper.jpg

Lochmaster 4.0 file:
TDA2003VoltageDoubler.zip

Re: Morley SLDW issues (Schematic traced)

PostPosted: 19 Jul 2019, 15:22
by Manfred
Sorry typo.

The corresponding post has been deleted in the mean time by the board administrator.