Furuno FCV-1200L Service Manual page 22

Test Point
TP Name
TP17 VTX L G
TP18 -VIN(P0V)
TP19 GND
TP20 VTX L
TP21 VTX H
TP22 P5V
TP23 P12V
TP24 -5V
TP25 +12VD
TP26 VTX CONT L
TP27 VTX CONT H
TP28 GND
LED
LED Color Name
GREEN VTX L
CR10
GREEN
CR19
RED OVER CUR
CR20
GREEN VTX L
CR21
RED IN HL
CR26
Adjuster
Adj. Name
R86 +5V ADJ
R69 VTX L ADJ
R20 VTX H ADJ
R93 PSYNC ADJ
Measuring
See Chapter.5
0V
5.0 + 0.25V
11.75 to 12.20 V
-4.75 to -5.25 V
11.0 to 16.0 V
1.35 to 5.0 V
1.35 to 5.0 V
0 V
ON when internal transceiver unit for high freq. is selected
+5V
Always ON ( +5 V output)
Normally OFF ( over current indicator )
ON when internal transceiver unit for low freq. is selected
Normal OFF ( ON when abnormal ship's main is detected )
Adjust s+5V at test point TP22 (P5 V)
Adjusts VTX L voltage. Voltage at TP20 is identical with "Supply Voltage of XDCR
Setting Menu (Low)
Adjusts VTX H voltage. Voltage at TP21 is identical with "Supply Voltage" of XDCR
Setting Menu (High).
Adjusts waveform of Power Sync. signals
Remarks
Switching signal
Negative line of ship's main
+B Voltage supplied to transmission amplifier (low)
+B Voltage supplied to transmission amplifier (high)
VTX CONT = (VTX + 3 ) x 5/133
VTX CONT = (VTX + 3 ) x 5/133
Functions
Functions
19