Confirming The Main Charger Current Control Circuit - Printronix L5535 Maintenance Manual

Confirming The Main Charger Current Control Cir-

Confirming The Main Charger Current Control Circuit

1. Using the engine checker, drive the main charger. The menu path is
BASIC MENU, DEVICE CHECK, OUTPUT SIGNAL, H.V.P.S., MAIN
CHGR, START.
2. Put the positive lead of the digital multimeter on TP35 on the MC board,
and the negative lead on TP30 (power supply ground) on the MC board.
3. Use the engine checker to set the device check mode for the rotary
switch. The menu path is BASIC MENU, DEVICE CHECK, INPUT
SIGNAL, SWITCH, ROTARY SWITCH.
4. The multimeter should display the following voltage readings when you
change the values of the rotary switch on the MC board (SW1). If the
voltages are not normal, replace the MC board.
SW1 Voltage
0 (Not
applicable)
±
1
0.73 0.06 V
±
2
1.45 0.11 V
±
3
2.18 0.17 V
±
4
2.91 0.23 V
±
5
3.64 0.28 V
±
6
4.36 0.34 V
±
7
5.09 0.40 V
±
8
5.82 0.45 V
±
9
6.55 0.51 V
±
A
7.27 0.57 V
±
B
8.00 0.63 V
±
C
8.73 0.68 V
±
D
9.45 0.74 V
±
E
10.18 0.80 V
±
F
10.91 0.85 V
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