UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Hameg HM307-3 Cleaning and Repair

OldTechFan96 · 12th Jun 2019, 4:51 pm

IC304 changed to a CNY17-3. No change in brightness.

New voltages T/B off, hor. ext in:

Pin 1: +1V
Pin 4: -894V
Pin 5: -870V
Pin 6: -897V

T352:

E: -902V
C: -868V
B: -868V

T353:

E: -900V
C: -900V
B: -900V

EDIT:

With the auto triggering switched off, the voltages at R366 change when the hor. ext. button is pushed.

Out: -864V blanked

In: -900V unblanked

12th Jun 2019, 4:51 pm	#100
OldTechFan96 Octode Join Date: Jul 2017 Location: Newcastle Upon Tyne, Tyne & Wear, UK. Posts: 1,178	Re: Hameg HM307-3 Cleaning and Repair IC304 changed to a CNY17-3. No change in brightness. New voltages T/B off, hor. ext in: Pin 1: +1V Pin 4: -894V Pin 5: -870V Pin 6: -897V T352: E: -902V C: -868V B: -868V T353: E: -900V C: -900V B: -900V EDIT: With the auto triggering switched off, the voltages at R366 change when the hor. ext. button is pushed. Out: -864V blanked In: -900V unblanked Last edited by OldTechFan96; 12th Jun 2019 at 5:11 pm. Reason: More info