BELARUS-1221.2/1221
В
.2/1221.3 Operating controls and instruments
40
Table 11
Contact
Address of the XP1 connector output
1
To the terminal “–“ (common)
2
To the power supply unit “+12 V”
3
To the PTO rotational speed sensor
4
To the rotational speed sensor “Left wheel”
5
To the transmission control unit
6
To the rotational speed sensor “Right wheel”
7
8
To the phase winding of the alternator
9
To the switch of the backlight
10
To the switch of the headlight upper beam
11
To the switch of the trailer turn indicators
12
To the switch of the parking brake
13
To the switch of the tractor turn indicators
Table 12
Contact
Address of the XP2 connector output
1
To the terminal “–“ (common)
2
To the control board contact “Indication mode”
3
To the control board contact “Parameter selection”
4
To the control board contact “Parameter value”
5
6
7
To the fuel volume sensor
8
To the control board contact “M”
9
To the control board contact “+UBZ”
1.12. Indicator Diagnostics and Troubleshooting
1. No instrument backlight:
Check the power supply of the output “9” of the 13-
contact block (ХР1) of the instr
ument
(Fig. 5);
2. Jerking and jumps of the pointer of the engine rotational speed indicator over
the dial:
poor contact on the alternator terminal and, therefore, poor signal from the
phase winding of the alternator. Repair.
3. Jerking of the pointer and understating the reading of the engine rotational
speed:
- Check and adjust the tension of the alternator driving belt.
4. Over- or understated readings of the engine and PTO’s rotational speeds (with
the normal movement of the pointer):
-
Check the correctness of programming the instrument according to the gear ratio of
the alternator drive (parameter “K”): (see item 1.10);
Summary of Contents for 1221.2
Page 1: ...BELARUS 1221 2 1221В 2 1221 3 1221 0000010РЭ OPERATORS MANUAL 2009 ...
Page 290: ...BELARUS 1221 2 1221В 2 1221 3 Supplement 293 Electrical scheme of tractor connections ...
Page 291: ...BELARUS 1221 2 1221В 2 1221 3 Supplement 294 Variants of tractor connections ...
Page 293: ...BELARUS 1221 2 1221В 2 1221 3 Supplement 290 826 3805010 instrument board scheme ...
