Furuno CN-24, Service Manual

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4-5
4.2.4 Adjustment Mode
The DIP switches S1 and S2 are used when depth and transmission frequency
adjustments are required.
The adjustment mode starts automatically when the DIP switch S2 #4 is set to OFF.
Following table shows the function of each settings of the S1 and S2.
0: OFF, 1: ON
S1 S2
1 2 3 4 5 6 7 8 1 2 3 4 5
Functions
0 0 0 0 x x x 0 0 0 0 0 0
Adjusts offset (0 m) of depth scale
1 0 0 0 x x x 0 0 0 0 0 0
Adjusts full scale (2000m) of depth scale
0 1 0 0 x x x 0 0 0 0 0 0
Stores offset data of 1/5 section into RAM temporally
1 1 0 0 x x x 0 0 0 0 0 0
Stores full-scale data of 1/5 section into RAM temporally
0 0 1 0 x x x 0 0 0 0 0 0
Stores offset data of 2/5 section into RAM temporally
1 0 1 0 x x x 0 0 0 0 0 0
Stores full-scale data of 2/5 section into RAM temporally
0 1 1 0 x x x 0 0 0 0 0 0
Stores offset data of 3/5 section into RAM temporally
1 1 1 0 x x x 0 0 0 0 0 0
Stores full-scale data of 3/5 section into RAM temporally
0 0 0 1 x x x 0 0 0 0 0 0
Stores offset data of 4/5 section into RAM temporally
1 0 0 1 x x x 0 0 0 0 0 0
Stores full-scale data of 4/5 section into RAM temporally
0 1 0 1 x x x 0 0 0 0 0 0
Stores offset data of 5/5 section into RAM temporally
1 1 0 1 x x x 0 0 0 0 0 0
Stores full-scale data of 5/5 section into RAM temporally
0 0 1 1 x x x 0 0 0 0 0 0
Loads all data of RAM onto NVRAM
0 0 1 x x x 1 0 0 0 0 0
Temperature adjustment mode selection
1 0 1 x x x 1 0 0 0 0 0
0 1 1 A B C 1 0 0 0 0 0
Transmission frequency adjustment mode selection "GAIN"
1 1 1 A B C 1 0 0 0 0 0 Transmission frequency adjustment mode selection
"Offset"
X: any position.
A, B, C: sets according to transmission frequency.
Caution
Do not activate the adjustment mode, if any adjustments are not nessesary.