Analog Board Voltage Test; Purpose; Required Tools And Equipment; Test Procedure - Polaroid 8035 Repair Manual

8K Series ProPalette Repair Manual

Analog Board Voltage Test

Purpose

This procedure verifies correct voltages on the ProPalette Analog board.
WARNING: This test requires that the outer housing of the ProPalette
be removed for access to the specified test points while the
equipment has the power turned ON.

Required Tools and Equipment

Multimeter

Test Procedure

With the ProPalette power on, use a multimeter to check the following voltages on the
analog board (Figure 4-14). If any voltage is out of specification, replace the low-voltage
power supply.
TP9 (filament voltage)
TP14 (DAC_VREF)
TP15 (DAC_VREFV)
TP10 (VDD_C)
TP8 (VSS_C)
Test Location
(Figure 4-14)
Figure 4-14. Analog Board voltage test points
95
Troubleshooting and Diagnostics
Reference Voltage
Location Specification
TP13 12.7 ±0.4
TP13 5.00 ±0.15
TP4 5.00 ±0.15
TP23 12.0 ±0.4
TP23 -12.0 ±0.6