Fluke 177 failed and need support to repair

[Chinhdc]

I found that model 177 has a 6-leads SOT-23 with name LPTZ, follow you guide, i check the pin 6 to COM, it's on a rail; then measure the impendance of pin1 (GND) - Pin4 (Vin) is high ~ 5MOhm; pin 1 - Pin 6 (Vout) ~ 30KOhm (infact the impendance is not stable at a value, it varies). So, it's the sign of defect the LPTZ component?
 Looking forwards your early tip to bring it back normally.

[Chinhdc]

and, i measure in Voltage the LPTZ component (Battery>9VDC):
- Pin1-Pin4: 4.92V
-Pin1-Pin6:2,475V
So, is any guy have a tip for me about this?

[bdunham7]

and, i measure in Voltage the LPTZ component (Battery>9VDC):
- Pin1-Pin4: 4.92V
-Pin1-Pin6:2,475V
So, is any guy have a tip for me about this?

It looks like the power supplies are good.  The IC marked 'PCY' right below the LPTZ is your 5.0V regulator, I don't see the 3.3V regulator if there even is one.  Look elsewhere for a similar sized IC with the markings 'AQI'.  If your power supplies are good, I don't have any other hot tips for troubleshooting this.

[andyB2022]

Hi, I have the same issue. @Chinhdc did you manage to solve the issue?

[Chinhdc]

not yet, the meter is still in the store (