The phaser..

Hi,

I hope you didn`t weld but solder ;D

Do you know this sheet and did you use it?

regards

Bernd

Hi,

for clarification: Did you measure the voltage across D1 and it was 1.2 Volts? (You should add the units with your measurements e.g. V, mA, Ohms kOhms...)

BTW: Are you sure you selected the right mode (DC-voltage) and range (20 V for Example) on your multimeter.

Zitat

I tried following the instructions of the sheet ...

If you want help you have to give us more information - for example the results of your measurements as shown in the paper.

regards

Bernd

Sorry,

with information like this

"in ic1 1.02V or lower
in Q1-Q4 1.20 v"

help is not possible.

The ic has 8 (eight) pins and so there are 8 (eight) voltages - referred to ground.
A transistor has 3 (three) pins and so there are 3 (three) voltages - referred to ground.

regards
Bernd

Hi Francesco,

it seems that you lost the supply voltage very early on the PCB!.
Please measure your battery/power supply voltage and check/change also the battery of your multimeter.
You should have 9 V at least at the pin 8 of IC1...3

Did you mount the three jumper wires JP1...3?

regards
Bernd

Zitat von FRANCOLU;347592

Value at batteries 8,54. batteries are new. jumpers .. look at the picture ...

Hi,
The Vr voltage must arround 4.9V. If not the phaser doesn't work. Check the right Value of the z-diode 5.1V, or make a bridge with a 10K resistor over the z-Diode. The voltage must then have Ub/2, approx. 4.5V). At the next step you can take off the 3 TL's and check then the voltage on the z-diode. If the DC.current to high the voltage are dropped.

regards Uwe

Hi Uwe and Francesco,

there seems to be a general/bigger problem: The voltage at pin 8 off all the IC is 1,70 V which should at supply level (9 V)

You should trace (follow) the 9 V from supply to the ic pins 8 to find the errror.

regards

Bernd

Hi

2 Questions:

To what point do you connect the black wire of your multimeter?
What is the voltage at the connection point "+9" on the PCB where the positive supply voltage arrives?

Bernd

Hi,

but when you measure 8,54 V at point 9+ there must be also 8,54 V at pin 8 IC1 (and the other of course) there goes a direct copper trace to this pin from 9+ - which is no longer than 1,5 cm ?!

BTW: You didn't mix up the 2 red wires which go to LD and +9?

Bernd