Furuno FR-2155, Service Manual

Page: 22 / 152

2-8
2.5 Block Diagram of SPU Board
Figure 2.3 Block Diagram of SPU Board
C19
C14
B23
B25
C25
C13
A13
A17
B4
C17
C11
C12
A21
P551
P551
P552
QV
VIDEO
AC SEA VR
GAIN VR
A/C RAIN VR
BEARING
HEADING.P
TUNE IND
KEY CONT.
NAV DATA INTPUT
GYRO DATA
GYRO CLOCK
TRACKBALL
4 Vpp
0.7 V
0 V
8 V to 12 V
Video Amplifier
MAX : 5 V, MIN : 0 V
MAX : 5 V, MIN : 0 V
MAX : 5 V, MIN : 0 V
Video
Selector
U43
A/D Converter
REF Voltage
Generator
U35
(360 pulses,144Hz)
(Gate Array)
Filter
R2/C1
STBY : 0.7 V,
TX : About 3 V
U45
TB XA
TB XB
TB YA
TB YB
CPU
#75
#82
#79
#97
#73
#74
#75
#76
U17
µ
s
Max. brilliance: 0.7 Vpp
A30
A31
A32
P552
To CRT
C20
P552
To CRT
U72,73,
74,75,76,
77,78 Even Level
Odd Level
Trigger Gen.
Odd Echo
Handling
Sampling
I/F Rejection
Noise Rejection
U45
03S9060
Signal
Processing,
Echo
Trailing,
Echo
Processing,
Coordinate
Conversion
(r, ) (X,Y)
INT
TRIG
U15
Echo Video
Memory
U24,26,28,
29,30
Priority
U33
TP7 (H SYNC)
TP8 (V SYNC)
4 V
16.63ms
4 V
15.63us
Flash
ROM(8M)
U11 RAM
U5,7
EEPROM
U10
ACRTC
U16
FR2115-SME-23
A22
A23
A24
R134
Trigger Gen.
Even Echo
Handling
Sampling
I/F Rejection
Noise Rejection
U44
03S9060
U72:VlEVEL 0
U73:VlEVEL 2
U74:VlEVEL 4
U75:VlEVEL 6
U76:VlEVEL 8
U77:VlEVEL 10
U78:VlEVEL 12
U79,81,
82,83,85,
86,88
U79:VlEVEL 1
U81:VlEVEL 3
U82:VlEVEL 5
U83:VlEVEL 7
U85:VlEVEL 9
U86:VlEVEL 11
U88:VlEVEL 13
U40
#6
#5
#7
P552
P551
#25
#26
P551
U35
PLL
U37
PLL
U46
#98
#14
#14
#4
#4
#103
Timing Adjuster
& Divider
INT
TRIG
Echo
Processing
U27
Echo
Trailing
Memory
U25
Color Paletle
D/A Converter
P/S Converter
U34
CRT VIDEO(R,G,B)
A20 To CRT
#97
#47
#48
Sampling Clock
8192 pulses
Character
Generator
U42
Graphic
Memory
U1,3,4,6,
8,9
From RP-26
(Video)
CR6
Buffer
U18,19
To Dual
port RAM
in ARP/RP
A17 NAV DATA OUTTPUT
CR2
#83
CR1
B5 KEY DATA
CR5
#80
B4
To INS
CR4
B5 From INS
CR8
#84
#83
C7 TO RJ-7
CR3
C8
FROM RJ-7
CR7
#36
#37
TP4(VIDEO)
TP3
C16
P551
OPTION TRIGGER
C17
TX TRIGGER
A25 TUNING CONT.
From U35 #89
TP6
From U35 #83
TP5
From U94 #1
TP9
TP1,2
OSC
32 MHz
Y1
40 MHz
OSC
12.5 MHz
OSC
54.25 MHz
4
(50 MHz)
* Socket type
At board replacement
remove EEPROM and
put on to new board.
* + cursor generation
SPU Board (03P9253)