Search Head Pcb; Oscillator Transformer Ratio; Figure 1-1. Oscillator Transformer Ratio - Thermo Scientific Apex Service Manual

Search Head PCBA Head Setup
Search Head
Oscillator
Transformer
1-2
Search Head PCBA Head Setup
Before fitting replacement PCB, check the position of solder jumper
PCB
JP14. Change position if necessary (solder link from bottom of PCB).
Position to suit high/low frequency option.
Ratio
Earth Strap
A96843
Figure 1–1. Oscillator Transformer Ratio
Table 1–1. JP14 Frequency Options
Solder Link (2+3)
Ratio 2:1
500kHz/150kHz
500kHz/100kHz
300kHz/150kHz
300kHz/100kHz
200kHz/100kHz
150kHz/50kHz
100kHz/50kHz
JP14
Screen
JP1
Solder Link (1+2)
Ratio 4:1
500kHz/50kHz
300kHz/50kHz
200kHz/50kHz
3 JP14 1
JP14
3
Thermo Fisher Scientific
REC 4258 Rev C