WaxJet 6100, Service Reference Manual

Page: 96 / 131

Printhead Heater Circuit Checks
The Printhead heater circuit can best be checked at the Printhead
PCB, but that involves removing the cover. An alternative is to
conduct continuity tests at the Printhead Data Cable.
1. Turn system off.
2. Remove connector at J1 of the Driver board and measure across:
Pins 44 & 43 Printhead Heater 40
S
Pins 35 & 36 Printhead
Thermistor
3k
S
hot
100k
S
cold
Power Supply Check
Power supply voltages can be checked on the Power Supply board or
on the cable that goes to the Driver Board (Figure 7-2). Always turn
system off before disconnecting any internal cables.
M5 VDC & +12 VDC referenced to COM.
Measure across both legs when measuring AC voltage.
Measure b150 and –150 for the high voltage DC.
J4 of DRIVER PCB
PIN 1 +150 VDC
PIN 2 -150 VDC
PIN 3 NOT CONNECTED
PIN 4 +12 VDC
PIN 5 +5 VDC
PIN 6 COMMON
PIN 7 36VAC
PIN 8 36VAC RET
Service 7-17