Converting 220v 50hz to 110v 60hz

Got a Panasonic WJ-AVE5, but turns out it has a UK plug and is rated for 220v with 50hz. Annoying and sneakily not clear from the seller, but wondering about the most discrete way to convert it for USA usage.

Ideally, I’d love to diy internal transformer solution. If not, anyone have an adapter suggestion that is not too bulky for handling the voltage and plug conversion?


Probably would work with a plug in 110>240 transformer, I think the PSU is linear so might have issues with noise from different mains frequency.

Are you ok with it being PAL?

…is it not compatible with both formats?!..

…ouffh! - it is not - at least not out the box…

…it is possible to mod it to NTSC, though…there is a jumper, the quartz has to be changed and tow further parts…

…there is a german-language forum where they did exactly that - turn a PAL WJ-AVE5 into an NTSC one - however - this seems to be not for the faint of heart and you need some professional equipment to calibrate the device:


:sweat_smile: translating… If you all prefer I can do this in my personal notes as opposed to on this public forum. …I can translate the entire thing here, but it will take me a few days to edit into this post. Let me know:

Converting WJ-AVE5 from PAL to NTSC

Reference Parts

I bought such a mixer cheaply, but I need full
NTSC support. On the European market this is not available
but in the service manual of the device I found hints for a conversion to
conversion to NTSC. Has anyone here done this before? Beside the
conversion, an adjustment is needed at the end. I would like to try it
and share my experiences here.

Beside the rejumping of the digital ICs the biggest problem is the rebuilding
of the two color decoders (IC5 and IC6). Here it is not enough to expose pin 17
but also the quartz must be changed (X1 resp.
X2). Typical for Panasonic is, that in the whole manual no frequency is mentioned, but only an eleven
but only a miserable order number (and there is nothing useful written on the
there is also nothing useful).
So it is worth to measure the frequency at pin 10
of the two decoder ICs, because many decoders work with 2*Fsc (so
8,867 MHz for PAL). The color carrier for NTSC is known to be at
The procurement on the other hand is easy, both the 3.579 MHz and the
7,144 MHz are cheap standard types.

Edit: Ahh, it’s in the alignment instructions. So it is indeed
a 1*Fsc crystal, so for NTSC it’s 3.579 MHz. The only uncertainty is,
whether at the SC output (test point 401 and 402) the crystal frequency is directly
or via an internal divider.

Ok, bevor ich loslege gehe ich das Abgleichprotokoll einmal durch und
notiere mir die Werte. Allein schon wegen eines möglichen späteren
Rückbaus, falls es doch nicht klappen sollte und Panasonic für NTSC auch
noch eine eigene Firmware entwickelt hat die meinem Gerät fehlt…

Ausgehend davon markiere ich auf den Bestückungsplänen die Position der
Bauteile und bestimme deren Werte anhand der Teileliste oder dem
Schaltplan (der ist wohl PAL, also werde ich mich mal auf die Suche nach
einem NTSC-Schaltplan machen müssen).

Erst wenn das alles klar ist greife ich zum Lötkolben :slight_smile:

Olli Z. wrote:

so I will have to start looking for
for a NTSC schematic diagram

It should differ at most in the power supply, because the
options for NTSC are also given in the existing schematic.
are also given in the existing schematic.

So, was a bit tedious but I’m through. I marked all components on the
board and used the plan to determine the values. Many of the
as resistors, turned out to be 0 Ohm bridges, only a few are really
as 0 Ohm bridges, only a few are really necessary. First and foremost
of course the quartz. It belongs to the 3 components that have to be rebuilt.

Main PCB up side

Main PCB down side

Designation Schem/Pos Board/Pos Conversion Value
C416 Main/Up/D2 Equip 39 pF
C417 Main/Down/B2 Equip 39 pF
J202 Main/Down/D1 Equip Reconnect J201
R287 Main/Down/D2 Equip 0 Ohm
R288 Main/Down/D2 Equip 0 Ohm
R290 Main/Down/D2 Equip 0 Ohm
R322 Main/Down/D2 Equip 0 Ohm
R439 Main/Up/D3 Equip 10 k
R440 Main/Down/B2 Equip 10 k
R508 Main/Down/D2 Equip 0 Ohm
R602 Main/Up/B2 Equip 0 Ohm
R618 Main/Up/B2 Equip 0 Ohm
R620 Main/Down/D2 Equip 0 Ohm (from R620)
R91 Main/Up/D2 Equip 0 Ohm
R99 Main/Down/B2 Equip 100 k
R50 Main/Up/D5 Replace 10k
R9 Main/Up/D7 Replace 10k
X201 Main/Down/D2 Replace 3.579545 MHz
C245 Main/Down/D2 Remove -
C246 Main/Down/D2 Remove -
C247 Main/Down/D3 Remove -
C252 Main/Down/D2 Remove -
C253 Main/Up/A2 Remove -
D202 Main/Up/B2 Remove -
D203 Main/Up/B3 Remove -
IC505 G6 Main/Down/D2 Remove -
J1 Main/Down/A7 Remove -
J2 Main/Down/A5 Remove -
J201 Main/Down/D1 Remove -
Q202 Main/Up/A2 Remove -
R227 Main/Down/C6 Remove -
R268 Main/Down/D4 Remove -
R291 Main/Down/D2 Remove -
R292 Main/Down/D3 Remove -
R293 Main/Down/D2 Remove -
R310 Main/Down/D2 Remove -
R311 Main/Down/D2 Remove -
R312 Main/Down/D2 Remove -
R323 Main/Down/D2 Remove -
R336 Main/Down/C3 Remove -
R337 Main/Down/D3 Remove -
R345 Main/Down/D2 Remove -
R504 Main/Up/A2 Remove -
R509 Main/Down/D2 Remove -
R510 Main/Down/D2 Remove -
R604 Main/Up/B2 Remove -
R619 Main/Up/B2 Remove -

1 Like