![Furuno FS-1503 Скачать руководство пользователя страница 81](http://html1.mh-extra.com/html/furuno/fs-1503/fs-1503_service-manual_2349767081.webp)
5-12
5.6 Measurements and Adjustment
CAUTION: Do not turn any adjusters until you understand their functions. The
measuring instruments must be calibrated before using.
Electrical Shock Hazard:
This equipment contains high voltages which can cause death at several
internal circuits. Any internal adjustment, servicing and repair shall only be
perfomed by qualified service personnel totally familiar with electrical circuits
and servicing of the equipment. A residual charge remains in capacitors and
other devices several minutes after turning off the power.
It is therefore essential to wait at least 3 minutes to allow residual charge to
subside before acceessing the inside of the equipment.
DANGER
1. Adjustment
Table 5-2 Adjustment (1/2)
Board
Item
Setting
Adjuster
Check Point
Level
Remarks
Overvoltage
protector
Input voltage: 17.0 to
18.5 V
-
-
Power: off
PA
temperature
Temperature: 25
°
C
-
J1 #7 (H) and
9 (C)
1.0
±
0.1 V
DRIVE
TR (Q4/Q5)
BIAS
Disconnect
[EXC IN], PTT ON
-
R69
40 to 60 mV
PA/FIL
(050667)
PA TR
(Q6/Q7)
BIAS
Disconnect
[EXC IN], PTT ON
R39
FL3
500 mA
±
50 mA
CPU
(05P0665)
Contrast
Adj.
-
R1
TP1 (H) and
TP2 (C)
3.3
±
0.05 V
Use high Z
voltmeter.
Output
power Adj.
Input voltage: 13.6 V
R15
J2 #1 (H) and
3 (C)
13.0 V
SW REG
(05P0668)
Oscillation
Freq Adj.
Input voltage: 13.6 V
-
TP1 (H) and
TP2 (C)
170 kHz
±
20 kHz
(22 Vpp)
Optional
COUP
(05P0669)
Phase Det.
Balance
Adj.
-
R24
-
Mid. point
May be changed
to fixed resistor
Содержание FS-1503
Страница 1: ...SSB RADIOTELEPHONE MODEL FS 1503...
Страница 27: ...2 20 ALC ALC REF POWER DATA EXC OUT Q26 25 ALC Circuit U6 ALC U7 8 TX RX Board Figure 2 13 ALC Signal...
Страница 85: ...5 16 5 7 Location of Parts 1 CPU Board 05P0665...
Страница 86: ......
Страница 87: ......
Страница 88: ......
Страница 89: ...5 20 5 DUMMY CONT Board 05P0670 Optional 6 SW REG Board 05P068 Optional...
Страница 90: ...AP1 1...
Страница 91: ...AP1 2...
Страница 92: ...AP1 3...
Страница 93: ...AP2 1...
Страница 94: ...AP2 2...
Страница 95: ...AP2 3...
Страница 96: ...AP2 4...
Страница 97: ...AP2 5...
Страница 98: ...AP2 6...
Страница 99: ...AP2 7...
Страница 100: ...AP2 8...
Страница 101: ...AP2 9...
Страница 102: ...AP2 10...
Страница 103: ...AP2 11...
Страница 104: ...AP2 12...
Страница 105: ...AP2 13...
Страница 106: ...AP2 14...
Страница 107: ...AP2 15...
Страница 108: ...AP2 16...
Страница 109: ......
Страница 110: ......
Страница 111: ......
Страница 112: ......
Страница 113: ......
Страница 114: ......
Страница 116: ......
Страница 117: ......
Страница 118: ......
Страница 119: ......
Страница 120: ......
Страница 121: ......
Страница 122: ......
Страница 123: ......
Страница 124: ......
Страница 125: ......
Страница 126: ......
Страница 127: ......
Страница 128: ......
Страница 129: ......
Страница 130: ......
Страница 131: ......
Страница 132: ......
Страница 133: ......
Страница 136: ......