Base of Q326 will only show a signal if sweeps are running.
If you set 7B70 as described in test conditions, and with a 1V/1kHz sine wave at External input:
- Do you see any sweeps?
- Do you see sharp pulses (not a sine wave) at base of Q309? What amplitude?
If signal at Q309 base doesn't have sharp edges, and because you ruled out a bad VR304, bias point of VR304 could be wrong.
- Is +15V correct?
- What voltages do you see at the bases of Q309 and Q317?
- What voltages do you see left sides of R300 and R306?
Ozan
toggle quoted message
Show quoted text
On Sun, Mar 31, 2024 at 10:11 PM, Adam R. Maxwell wrote:
A waveform was present at Q309 and Q317, but not at the base of Q326, so I'll
look at that area more closely and take better notes. The triggered holdoff
stage description in the manual is over my head, as usual.
thanks,
Adam
