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Furuno
Marine Radar
FR-2125
Furuno FR-2125 Service Manual
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3-2
1
FR-21
15
RTR-062
Figure
3.17
RF mod
ule, top
view
Figure
3.18
RF mod
ule, bot
tom view
Circulat
or
(RC-3686)
MIC
(RU-9253/
9371)
IF Amp Boa
rd
(03P9232)
RFC Boar
d
(03P9243A)
VR1 on MO
DULA
TO
R
Board (03P
9244A) for
magnetr
on current
ad
j
ustm
ent
Magnetr
on
(
MG5241
)
MODULA
TOR
Board
(03P9244A)
Pulse
T
ransformer
(
RT-9025
)
73
75
Table of Contents
Default Chapter
15
Table of Contents
15
Chapter1. GENERAL
17
Outline
17
Boards & Major Components
18
Specifications
19
Chapter 2. BLOCK DESCRIPTION
22
Overview
22
Block Diagram of Display Unit
23
Function of each Board (Display Unit)
24
Start-Up Sequence
26
ARPA Start-Up Sequence
27
Block Diagram of SPU Board (Video Amplifier)
30
Auto Tuning Function
31
Tuning Indication
32
Manual Tuning
32
Tuning Circuit
32
Echo Averaging (EAV 1/2/3)
33
Memories & Memory Frame Priority
34
Check of ARP and RP Board Connection
36
Vs. ARP-26
36
Simple ARPA Block Diagram
37
ARPA Block Diagram
38
ARPA Target Acquisition and Tracking
39
Arpa Initial Setting Menu
40
Block Diagram of RP Board
43
INPUT/OUTPUT Data on INT Board (03P9252)
44
Sentences Receivable at J450 on INT-9170
45
Radar and ARPA Output Signal from INT-9170
46
Monitor Signal from J449
47
Power Supply Circuit (DC)
48
Power Supply Circuit (AC)
50
Scanner Unit
52
General
52
Chapter 3. ADJUSTMENT
54
Adjustment (Display Unit)
55
Location of Major Parts
55
Adjustment of CRT
58
Adjustment (Scanner Unit)
68
Fr-2125 Rtr-063
70
Fr-2115 Rtr-062
74
Chapter 4. MAINTENANCE
78
Dip Switches
79
Jumper Settings
80
LED Status
81
Notice on Replacing Major Parts
85
Program Numbers
86
How to Update System Program
86
Alternation of Power Supply
88
Chapter 5. TROUBLESHOOTING
89
Outline
89
Error Message
89
Troubleshooting Flow Charts
89
Schematic Diagrams
115
4
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Furuno FR-2125 Specifications
General
Brand
Furuno
Model
FR-2125
Category
Marine Radar
Language
English
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