Furuno FR-2155, Service Manual

Page: 68 / 152

3-12
Location of Parts on PTU Board, for AC set (03P9245)
Test points and Ratings
TP No. Signal Rating Condition
J104
# 1(+) & # 3(-)
+140 V 138 to 142 VDC, adjusted by VR51
J105
# 1(+) & # 7(-)
+32 V 27.0 to 35.0 VDC TX
J105
# 2(+) & # 7(-)
+12 V 12.1 to 13.5 VDC
J105
# 4(+) & # 7(-)
+5 V 4.8 to 5.2 VDC
J105
# 9(+) & # 7(-)
-12 V -11.0 to -13.0 VDC
Q31 Collector
& Chassis Inverter
freq., U31 42.75 to 47.25 kHz, adjusted by VR1
FL71&
Chassis Inverter
freq., U71 42.75 to 47.25 kHz, adjusted by VR71
TP1,2 (+) &
Chassis(-) Inverter
freq., U71 42.75 to 47.25 kHz, adjusted by VR71
JP91
VR91
JP92
J105
VR1
VR51
J104
VR71
J103
CR12 CR11 JP3 JP2
JP1