HP Designjet 3D Service Manual page 133

L. Pauses During Build
1. Chamber won't heat up to
at least - 77 degrees
2. Head not maintaining
temperature.
1. Verify top and side panels and insulation are
installed.
2. Verify chamber fans are operating.
3. Check J3 heater connector/pins on the PDB.
4. Heater bad. Check heater resistance - should be
36 +/- 5 ohms.
5. Relay failed on PDB, replace PDB.
6. See error code 14-40.
1. Low AC input power. Make sure system is NOT
attached to an ext. cord/power strip
2. Umbilical cable connector loose at head board -
check to make sure it is fully seated.
3. One of the four heaters is bad. Check resistance
of heaters should read about 92 Ohms
4. T/C board is bad. Replace T/C board
5. Head Board is bad. Replace Head Board
6. If head board with LED's is present, check
model and support 120VDC LEDs at head
board.
• If both model (upper) and support (lower)
LEDs are illuminated, head heater is bad.
Replace head.
• If only the model LED (lower) is illuminated,
replace the 120VDC power supply
• If only the support LED (upper) is illuminated,
replace the power distribution board
7. If head board with LED's is not present, use volt
meter to check for 120 VDC at head board.
• If 120VDC present at both model and sup-
port side, heater is bad. Replace head.
• If no 120VDC at support side, replace
120VDC power supply.
• If no 120VDC at model side, replace power
distribution board.
8. Check ground between Toggle Plate and Head
Board. If open, check for missing washers on
head.
9. The heater wires in the umbilical cable are
broken.Replace cable.
10. Head T/C is crushed. Check by ohming from
the T/C connector pin to the head body.
Reading should show open. If not, replace
toggle head.
1 1. Replace toggle head
12. See error codes 14-39, 14- 1 00 and 14- 1 33.
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