C. Power Supply
Locate CPU Board (Fig 1d) and disconnect
connector J1 (Fig 1d). Locate power supply (Fig
1c). Measure voltage between the wire connection
marked ac- and ground marked gnd (See Fig 1c).
This voltage should be greater than
7V a.c.. Repeat for the wire connection marked ac+
and gnd. If either is zero or less than 7V a.c.,
replace the power supply.
D. C.P.U. Board
Identify C.P.U. board as shown in Fig 1d. Locate
voltage regulator (VR1) see Fig 1e.. Measure
voltage between pin 2(gnd) and 3. If voltage is less
than 4V d.c.. Check voltage between
pin 1 and pin 2 (gnd). If greater than 7V d.c.,
replace C.P.U. board.
E. Display Board
If 7.2.1 A to D fail to correct problem replace
display board (Fig 1f).
9
Figure 1c
Figure 1d
AC+
GND
J1 Connector
CPU Board
AC-
Power Supply
J3
Summary of Contents for ProMix 400
Page 1: ...REPAIR GUIDE MODEL 400 MODEL 401 MODEL 402 the ProMix AMALGAMATION UNIT...
Page 2: ......
Page 23: ...NOTES...
