MPX G2 Service Manual
5-28
-15VA Test point marked -15VA -14.25 to –15.75
just above C150 left of P/S
+5VO Test point marked +5VO +4.75 to + 5.25
(Analog Output) just left of C136
-5VO Test point marked -5VO -4.75 to –5.25
(Analog Output) just above U29 left of P/S
+5VI Test point marked +5VI +4.75 to + 5.25
(Analog Input) below U68 top left corner
of Main board.
-5VI Test point marked -5VI -4.75 to –5.25
(Analog Input) below U68 top left corner
of Main board.
+2.5VDIN Test point marked +2.5VDIN +2.38 to +2.63
(Input Dig-Pot) above U68 top left corner
of Main board.
-2.5VDIN Test point marked -2.5VDIN -2.38 to -2.63
(Input Digi-Pot) above U69 top left corner
of Main board.
+2.5VDOUT Test point marked +2.5VDOUT +2.38 to +2.63
(Output Digi-Pot) left of U10 rear left corner
above Rear input jack J1.
-2.5VDOUT Test point marked to the -2.38 to -2.63
(Ouput Digi-Pot) left of U11 rear left corner
above Rear input jack J1.
+1.8VIN Rear of R292 just below Q28 +1.7 to +1.9
(Input Latch-Up) top left corner of Main board.
-1.8VIN Rear of R295 just left of C308 -1.7 to -1.9
(Input Latch-Up) top left corner of Main board.
+1.8VO Rear of R16 just below Q3 +1.7 to +1.9
(Output Latch-Up) back of Main board above J4
-1.8VO Rear of R19 just below Q4 -1.7 to -1.9
(Output Latch-Up) back of Main board above J4
Battery Voltage:
1. Turn the MPX G2 off and detach the power cord.
2. Set the DMM for a DC voltage on the 20 volts DC scale.
3. Locate battery just to the Left of the power supply
4. Place the DMM probes on either side of the Battery (Black to negative Red to positive).
5. The reading should be 2.50V. If the voltage reading is below 2.5V replace the battery.
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