Furuno FR-2155, Service Manual

Page: 45 / 152

2-31
2.29 Scanner Unit
MAG CURR
Video siganl
(To display unit)
+12V
(From PSU-001)
TUNE CONT.
(From Display unit)
TUNE METER
(To display unit)
TX-HV
(From PSU-001)
Regulator
U614
Tune Amp.
U616
Log Amp.
U601 `607
MIC protect
CR617
V1 (Over shoot)
-12kV
0V
*V1=Mag error voltage: approx 1.9 kV
MIC
Scanner
Motor
B801
S-RX24
Magnetron
M4505E
Radiator
Circulator
RX TX
RC-3686H
TR Limiter
BS4122/E3902
Waveform
Reshaper,
Amp
BEARING SIG.
GEN. Board
MP-3795
Magnet
U902
Switching
Q901, Q902
Photo-Interrrupter
Timing Disk
U901
Read Sw
S801
HD FL
SYNC P
Heading
(To dispaly unit)
discharge
Pulse Transe
T801
FR2155-SME-27A
G0B8222: 200VAC 3ƒÓ 50Hz
220VAC 3ƒÓ 60Hz
RM-6585:24VDC
K803
(L)
K802
(M2)
K801
(M1)
PFN(2) Board (03P6669 B)
L801
CR813
CR814
CR815
Mabnetron Current
detection Board
(03P6827)
Charge
RTB Board
(03P6666 C)
Heater (-)
Magnetron Heater
R811(4/10W)
R812(2/10W)
Magnetron Heater Adjustmnt
IF Amp. Board
(03P6834 C)
IF OUT
+5 VDC
+5 V to 35 VDC (TUNE CONT.)
INT Board
(03P9004)
TUNE METER
IF output
MAG ERROR
*Being generated when
magnetron is defective and
open-circuit of load of T801.
TRIGGER (Pulse Width)
Heater (+)
K851
MAG ERROR
(To PSU-001)
Bearing
(To dispaly unit)
)
(From PSU-001)
HEATER(-)
(From PSU-001)
PFN (1) Board
(03P6668)
+6 V
Error: +12 V
Normal