18
3. CHECK AND ADJUSTMENT
3.1 Test Points
DISP Board (06P0238)
Test Points Name
Rating
Remarks
TP1
+5V
4.75 to 5.25 V
Source voltage of LCD control circuit in LCD 1.unit
TP3 PGND
TP4
No name
2.40 V + 0.05 V
TP7
+12V
11.8 V to 12.2 V
Source voltage of LVD inverter board
TP8
+5V
4.75 V to 5.25 V
+5 V for DISP board
TP10 GND
TP11 GND
TP12 Switching
Frequency
70 kHz + 1 kHz
Adjusted by R65
CPU Board (06P0258)
Test Points Name
Rating
Remarks
TP1 TXV 3.0
V
TP2
SIG
0 to 5 V
Echo signal(DC level) from the TRX board
TP3
TVG
5 to 0 V
TVG curve
TP4 KP
Trigger
pulse
TP5
TX0
Pulsed transmission carrier signal
TP6
TX1
Pulsed transmission carrier signal
TP7 GND
TP8 LCL
Local
signal
TP9
VOL
0 to 5 V
Audio volume control voltage
TP10 Not
used
TP11
DISP CLK
25.175 MHz
TP12 GND
TP13
PITCH
3.5 V
With no pitch signal
TP14
ROLL
3.5 V
With no roll signal
TP15
R
0 to 1.0 Vpp
Red
TP16
G
0 to 1.0 Vpp
Green
TP17
B
0 to 1.0 Vpp
Blue
TP18 GND
TRX board (06P0241)
Test Points Name
Rating
Remarks
TP1 GND
TP2
IF
0 to10 Vpp
455 kHz IF signal
TP3
SIG OUT
0 to 10 VDC
Rectified receiving signal
TP4 GND
TP5
AUD OUT
0 to 10 Vpp
1 kHz Audio Signal
TP6
TR2
See Figs. 3.1 and 3.2
TP7 GND 0
V
TP8
TR1
See Figs. 3.1 and 3.2
TP9
AGC
0 to 3VDC
TP10
VG
0.5 to 1.5 VDC
Gain control voltage; min: 0.5 V, Max: 1.5V.
Summary of Contents for CH-270
Page 1: ...COLOR SEARCHLIGHT SONAR CH 270...
Page 13: ...10 58 59 6 6 DRV 06P0154 Hull Unit XDR Slip ring Figure 2 1 Signal Flow in Transmitter...
Page 14: ...11 Hull unit XDR Slip ring 6 6 59 58 Figure 2 2 Signal Flow in Receiver...
Page 19: ...16 Figure 2 5 TRANSCEIVER UNIT CPU J2 3 4 3 4 5 6 J10 5 6 7 8 CR16 U17 U34 191 R104 R105...
Page 23: ...20 DRV Board 06P0154...
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