Furuno NX-700B Service Manual page 59

R20:
Switching frequency ADJ
(135 kHz + 1 kHz)
Check: TP1 – TP2
TP1(-)
Fig. 3.1.5 PWR (Printer Power board): 08P3226, side-A
Fig. 3.1.6 PWR (Printer Power board): 08P3226, side-B
3-3
3.1 NX-700A
TP1(+)