ADJUSTMENT PROCEDURES
Test Equipment Required
1.
Test Adaptor (See Figure 5)
2.
Digital Voltmeter
Voltage Cutoff
1.
Connect the Test Adaptor to TB-1.
2.
Set switch S1 on Test Adaptor to position 2.
3.
Set S1 on Charge Board to "ON" to apply power to
the charging circuit.
4.
Set R43 on Charge Board fully counter clockwise
(CCW).
5.
Connect the Digital Voltmeter to TP2, and set its
voltage at +9.5 V + 0.05 V by adjusting trimmer R4
on the Test Adaptor.
6.
Verify that voltage on A13-6 e10 volts.
7.
Slowly adjust R43 clockwise until the RDY indicator
just turns on.
TROUBLESHOOTING
PROCEDURES
A Troubleshooting Procedure is provided to assist the
service technician to rapidly isolate a fault in the equipment.
A table of Quick Checks and reference tables containing
typical voltage readings and pin status for
various modes of operation are provided as a troubleshoot-
ing aid.
Test Equipment Required
Multimeter
Test Adaptor
Procedures
1.
Connect the Test Adaptor to TB1 on the Charge
Board.
2.
Set S1 on the Test Adaptor to position 2.
3.
Set S1 on the Charger Board to ON to power up the
charging circuit.
4.
Adjust R4 on the Test Adaptor for +8.5 Vdc as
measured at TP2 on the Charge Board.
5.
Sets S1 on the Charge Board to OFF. Set S1 on the
Test Adaptor to position 1.
6.
Set S1 on the Charge board to ON. Refer to Tables 1
and 2 and monitor the reference points listed. Prob-
lem areas are identified by an indication other than
that listed in the tables.
7.
Set S1 on the Charger Board to the OFF position. Set
S1 on the Test Adaptor to position 3.
8.
Set S1 on the Charge Board to the ON position and
then back to the OFF position.
9.
Disconnect the Test adaptor from TB1.
10. Set S1 on the Charge Board to the ON position. This
completes the operational checks of the charger.
PROBLEM
ACTION
CHARGE Led does not light.
Check input fuse, Q2, & C19
READY light fails to come on.
Check Q3, Q4, & DS4
Battery pack is good.
Charging time has elapsed.
A13-10 always high. Logic fails to reset.
Check C19
A13-6 always low. No fast reset
Check C22 charge.
A13-5 always low.
Check C23
Fast charge circuit does not function
Check CR9, Q3, & Q4 for open.
Table 1 - Quick Checks
REF.
SW
A13
PIN
NO
CHRG
READY
REMARKS
STEP
POS
6
5
10
LED
LED
1
Low*
Low Low On Off
Cold
Battery
6
2
High
Low Low On Off
Normal
Battery
Charging
3
Low High
High
On On
Charged
Battery
7
3
Low Low Low On Off
Hot
Battery
8
N/A
Low Low Low Off
Off
No
Battery
*LOW- Pin Voltage less than 1.0 Volt
HIGH- Pin voltage greater than 3.0 Volts
Table 2 - Equipment Status
Power Supply Voltage: +13.8 Vdc.
CHECK
S1 : ON
RAPID CHARGING
TRICKLE CHARGING
POINT
W/O BATTERY
STANDARD HI CAPACITY
STANDARD/HI CAPACITY
TP2
8.35
8.50
8.57
8.37
TP5
-
4.15
4.20
4.8
TP6
4.74
4.74
4.74
4.74
TB1-4
5.60
5.47
5.54
3.53
(T)
Q3-E
13.79
12.02
11.981
3.79
Q4-C
13.37
0.03
0.03
13.36
A13-14
4.04
3.58
3.68
8.08
A13-12
5.13
11.09
11.05
5.21
Table 3 - Typical Voltage Readings (all voltages are + dc.)
LBI-31869
LBI-31869
4
