Larcan FM-250, Technical Manual

Page: 13 / 86

FM-250 FM BROADCASTING EXCITER
Issue Date: 21 Jan 2003
Figure 3: Block diagram of FM -250
STEREO
CODER
980512
OV
OV
LEFT (XLR)
RIGHT (XLR)
PRE-EMPH
(SWITCH)
SYNTHESISER
980507
OV
MPX (I/P)
OV
AUX 1 (I/P)
OV
AUX2 (I/P)
SYNTH
REMOTE
(D-15)
PL1
PL2
PL3
SK2
SK3
SK4
PL2
MPX OUT
RF P.A.
250W
980510
OV
RF OUT
(N TYPE)
RF OUT
SK1
CONTROL PCB
980508
BACK PANEL
INPUTS
OV
PILOT OUT
(BNC)
REAR PANEL
SK1
PL4
10 way ribbon
cable
PL4
REMOTE
TELEMETRY
REAR PANEL
(D-25)
PL7
DEVIATION
ADJ.
(OPTIONAL)
PL3
PSU
PL4
PL5
THUMBWHEEL
(OPTION)
PSU PCB
980508
PL1
OV
SK1
ALC
TEMP
CNTRL
FWD
REFL
PL3 PL1 PL2 SK1 SK2
PL1
PL2
PL3
DISPLAY
PCB
980509
26 way ribbon
cable
PL6
20 LED MULTIMETER
STEREO VU METER
PILOT INDICATOR
FAULT INDICATORS
FUNCTIONAL INDICATORS
DEVIATION ADJ. (OPTIONAL)
RF POWER ADJ.
RS485 (OPTIONAL)
REAR PANEL
PL1
PL8
500VA
TRANSFORMER
RF MONITOR
FRONT PANEL
(BNC)
OV 230V
50Hz
(IEC INPUT)
E
N
L
0V
+48V
O/P
AUX.
VOLTS
+24V
AC
+48V
AC
230V
50Hz
FRONT
PANEL
POWER
SWITCH
SK1/1
25A
BRIDGE
PL4
PL1
+
~
~
SK1
AUX PSU MAIN PSU
8A
10A
D.C.
INPUT
SK4 SK1/3
PL3
FAN
PL2
250W STEREO EXCITER BLOCK SCHEMATIC
25A
BRIDGE