Furuno 1622 User Manual

5.4
!
Test points on Each Board
25
5.4 Test points on Each Board
1) DU Board)03P9268*
Test point Check Item Ratings Remarks
TP1
DC
&
TP2/TP1
"
9V 8.7
'
9.9Vdc
U3-#5
TP3/TP1 Q6-D
21.7
'
29.4us
Switching Waveform (Primary)
TP4/TP1
"
5V 4.8
'
5.2Vdc
Adjuster: VR2
Same reading at between J1-
#2(+) and J1-#5(-)
TP5 GND GND
TP7/C55 INV
11.2
'
14.5V
-
68
'
92kHz
DC-AC Inverter, Primary
TP11/TP5 XTAL
36.85
'
40.85kHz
TP12/TP5 BLCK
8.1725
'
10.7125kHz
BLCK, U118-#87
TP13/TP5 TRIG
V=9.0
'
12.0
.
T=6.0
'
10.0us
TX Trigger, U111-#60
TP14/TP5 BP
V=4.0
'
5.2V
T=5.5
'
6.5ms
Bearing, U118-#138
TP15/TP5 HD
V=4.0
'
5.2V
T=2.5
'
2.9S
Heading, U118-#137
TP16/TP5 VIDE
Same wave as
TP602, IF Board (03P9269)
Video, DJ1-#6
2) MD Board)03P9270*
Test point Check Item Ratings Remarks
TP801/TP802
+9V
8.7
'
9.9Vdc
TP803/TP802
VD1
34
'
46kHz Save wave as VD2
TP804-1/ TP804-4
-6V
-6.9
'
-5.5Vdc
TP804-2/ TP804-4
+5V
4.75
'
5.25Vdc
TP804-3/ TP804-4
+12V
11.9
'
12.1Vdc Adjuster: VR801
TP804-5/ TP804-4
Magnetron Current
2.8
'
3.6Vdc Adjuster: VR851, TX, 3nm Range
TP804-6/ TP804-4
+8V
7.8
'
8.2Vdc
TP804-7/ TP804-4
ST-BY/TX
8.5
'
9.35Vdc
(8.1
'
9.1Vdc)
ST-BY
(TX
-
6nm)
TP805/TP806
+12V
11.9
'
12.1Vdc
TP807
GATE2
Waveform 2 Gate signal of switching FET
TP808
VD2
Waveform 3
TP811
TRIG
Waveform 1
TP812
GND
Not SHIP’S MAIN COLD
TP813
TX. PW.
Waveform 4 Pulse transformer drive signal
TP814
GATE1
Waveform 5 Gate signal of switching FET

Furuno 1622 Specifications

General

Brand	Furuno
Model	1622
Category	Marine Radar
Language	English