Platen Open Switch; Dc Power Supply Fuse - Printronix P6000 Series Maintenance Manual

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5-39. Platen Open Switch

b. Installation
1. Connect leads (3) to switch (4).
2. Place switch (4), spacer (5), and nut plate (6) on left side plate (7).
3. Install two screws (1) and washers (2). Do not tighten.
4. Position switch (4) so that Forms Thickness Adjustment Lever (8) activates it when lever
is .75 to 1 inch from the 6 position.
5. Install cover per paragraph 5-17b.
6. Replace paper in printer.
5-40. DC Power Supply Fuse (Figure 5-36)
a. Removal
High electrical potentials may be present at power supply even with power
disconnected. Exercise care; severe injury or death is possible.
1. Disconnect power cord (1). Wait five minutes before continuing.
2. Loosen two fasteners (2) and allow rear door (3) to swing open.
3. Swing out card cage (4).
4. On capacitor C1 (5), temporarily install a 1K, 10W resistor between C1+ and chassis
ground.
5. On capacitor C3 (6), temporarily install a 1K, 10W resistor between C3+ and ground.
6. Inspect fuses F1 (7), F2 (8), and F3 (9) on power supply PCBA (10).
b. Installation
1. Replace any blown fuse with fast blow type. See below.
FUSE
F1 8AFB
F2 3AFB
F3 3AFB
2. Remove temporary bleeder resistors installed on C1 (5) and C3 (6).
3. Swing card cage (4) back into place.
4. Close rear door (3) and tighten two fasteners (2).
5. Reconnect power cord (1).
5-72
-continued
WARNING
-
TYPE VOLTS (P6080)
-
VOLTS (P6040)
+36
+5 -30
-36 +28
P6040/P6080 Corrective Maintenance
+8