Location Of Parts On Spu Board (03P9253) - Furuno FR-2155 Service Manual

Location of parts on SPU Board (03P9253)

TP11
TP13
TP12
TP5
TP6
TP9
Test points and Ratings
TP No.
TP1 GND
TP2 GND
TP3 TUNE IND
TP4 RF VIDEO
TP5 TX TRIG
TP6 SAMPL T
TP7 H SYNC
TP8 V SYNC
TP9 TUNE V
TP11 VIDEO
TP12 VIDEO LEVEL
TP13 STC CURVE
TP1 CR8 CR7 CR6 CR5 CR4 CR3 CR2 CR1
TP8 TP7 R140 TP4 TP3 TP2
Signal
Approx. 1 to 3.2 VDC
3.9 to 4.1 Vpp
4 V to 12 V, positive, approx. 3.5 to 15 us
S1: approx 2200 Hz,
M1: approx 1100 Hz,
M2: approx 600 Hz,
L : approx 600 Hz,
!
120 NM: approx 500 Hz
Approx. 64 kHz
Approx. 60 Hz
Approx. 2 V to 32 V
Approx. 5 V
3.9 to 4.1 Vpp, negative, main bang level
Adjusted by R140
4 us: 0.8 to 1.1 V, 10 us: 1.3 to 1.6 V
20 us: 1.9 to 2.3 V, 40 us: 2.7 to 3.0 V
60 us: 3.3 to 3.7 V, 90 us: 4.1 to 4.5 V
120 us: 4.3 to 4.7 V
Rating
3-7
Condition
TX
(except for maximum
range)
TX
TX
Range: 12 nm
IR: OFF
STC/FTC: fully ccw
Ant. Height: 10 m
Range: 12 nm
Gain: fully cw
STC: fully cw