Kongsberg Simrad RA83, Service Manual

Page: 20 / 210

2.2 Processor Unit (RP100A/RP100AP)
In the Processor unit, there is a control PCB. Interface connectors are all on the PCB. The block
diagram is shown in Fig.-2.2.1.
Video
Memory
"256kx8"x8
Video Amplifier
/Signal
Processing
AA239AFP
Signal
Processing
KCD-64
Display
Control
FPGA
（
U57
）
Advanced
CRT
Controller
HD63484
CPU
HD64F2398
RAM
128kx8
Frash ROM
1Mx8
2Mx8
Control Signal
Video
/Trigger
Azimuth
/Heading
SCANNER UNIT
D/A
converter
Power
Supply
2SK2379
2SK1421
uPC494G
TC4011BF
Ship's Power
+5V
+24V
250V(H.T.)
-12V
+12V
+40V
Operation unit
Panel pcb
E40-901C
Video
Memory
"256kx8"x6
D/A
Converter
FMS3818
LVDS
Converter
DS90C387A
VIdeo
Buffer
Opa692x3
Memory
&
Panel
Control
FPGA
（
U37
）
Display unit
JH 17T01 MMD,
JH 19T01 MMD,
etc.
Fig.-2.2.1
Block Diagram
2.2.1 POWER PCB (E47-600A)
The power supply circuit consists of:
a. Noise filter, C15, C16, C19, C21, L6, L14,
b. Power switch control, U2, CR24, CR26, Q2, Q3, Q5,Q33.
c. Power supply for power switch circuit, Q1, CR4.
d. Regulator, U1, U3, Q7 to Q13, Q15 to Q17 and L7 to L9, CR8, CR9,CR23.
e. Main inverter, U4, Q20 to Q25.
f. Over current protector, Q18, Q19.
g. Over input voltage protector, CR1, CR2, CR3.
The power supply is designed to regulate the +5 V output voltage controlled by "e. regulator" circuit.
The feedback signal from +5 V line is detected through U1. The error amplifier and switching duty
control performed by U3 and CR5. The controlled power from regulator circuit is switched by U4,
Q24, and Q27 to drive the main transformer, T1.
When ship's source voltage is too high, "h. over input voltage protector" circuit will shut down the
power supply.
When over loaded, "g. over current protector" detects the current and will shut down the power
supply.
The output voltages are:
+5V for logic circuit,
+12V for scanner and LCD Logic, etc.,
-12V for analog circuit
2 - 10
93842105-00