WhitakerAudio JC Whitaker 20 W Stereo Integrated Audio Amplifier, Руководство пользователя, Страница: 147 / 196

147
20 W Stereo Integrated Audio Amplifier
• While monitoring terminal #3 of TB4 on the left channel PWB, set the Bias Adj.
potentiometer (R57) for –30 V.
Table 6.3 Typical Voltmeter Readings
(readings /–10% can be considered normal)
Tube Pin No. Typical Reading Notes
V1, V4
6U8A
1 205 V
2 0 V
3 40 V
4 60 V Heater
5 60 V Heater
6 80 V
7 1 V
8 80 V
9 80 V
V2, V5
6973
1 340 V
2 0 V
3 –30 V
4 60 V Heater
5 60 V Heater
6 –30 V
7 0 V
8 340 V
9 345 V
V3, V6
6973
1 340 V
2 0 V
3 –30 V
4 60 V Heater
5 60 V Heater
6 –30 V
7 0 V
8 340 V
9 345 V