Rain bird Mim-x, MIM, Mim-link User Manual
“MIM” & “MIM-LINK” Interface
Module and
“MIM-X” Expansion Module
TROUBLESHOOTING AND
CONTROLLER REPAIR
MANUAL
TABLE OF CONTENTS
ITEM DESCRIPTION PAGE
1.0……………Purpose of this Guide...... 1
2.0……………Main Components of the Module .... 1
“MIM” Interface Module .... 1
“MIM-LINK” Interface Module ... 2
“MIM-X” Interface Expansion Module . . 2
3.0…………...Troubleshooting of Transformer, Display PC Board,
Central Processing PC Board, Output PC Board,
RF Radio Package and Modem PC Board... 2
A. Interface Module (MIM, MIM-LINK & MIM-X)
Appears to be “DEAD”..... 2
Transformer...... 2
Output PC Board..... 3
3.1……………Problem is suspected to be on the “CPU” PC Board . 4
CPU PC BOARD..... 4
B. Checking MICROPROCESSOR “U3” on CPU PC Bd. . 4
C.Checking “U8” PROM Chip..... 6
D. Checking “U9” Chip...... 6
E.Checking “U5” Chip...... 7
F.Checking “U2” Chip...... 8
G.Checking “U4” Chip...... 8
MIM / MIM-LINK / MIM-X Troubleshooting & Controller Repair Manual GT27072B
i
TABLE OF CONTENTS
ITEM DESCRIPTION PAGE
3.2……………Problem seems to be with OUTPUT PC Board . . 9
For “MIM”, “MIM-LINK” or “MIM-X” UNITS
H. Checking “U6” Chip...... 9
3.3……………Problem is being experienced with feedback... 10
For “MIM”, “MIM-LINK” or “MIM-X” UNITS
I. Checking “U7” Chip...... 10
3.4……………Problem is suspected to be on the OUTPUT PC Board . 10
For “MIM”, “MIM-LINK” or “MIM-X” UNITS
OUTPUT PC BOARD..... 10
J. All “LED” lights, for the four wire paths, burn
“Steady and very dim” or DO NOT burn at all . . 11
For “MIM” and “MIM-X” units ONLY!
ON FRONT PANEL OF UNIT.... 11
ON OUTPUT PC BOARD..... 11
K.Further checks of OUTPUT PC Board... 12
For “MIM” and “MIM-X” units ONLY!
L.No OUTPUT on one or more wire paths... 13
For “MIM” and “MIM-X” units ONLY!
MIM / MIM-LINK / MIM-X Troubleshooting & Controller Repair Manual GT27072B
ii
TABLE OF CONTENTS
ITEM DESCRIPTION PAGE
M. No FEEDBACK FROM Units on Wire Path . . . . 13
For “MIM” and “MIM-X” units ONLY!
N. Further checks of OUTPUT PC Board on “MIM-LINK” Unit . 14
For “MIM-LINK” Unit ONLY!
FRONT PANEL OF MIM LINK UNIT.... 14
LINK OUTPUT PC BOARD..... . 14
3.5…………...Problem is suspected to be with the RF MODEM . . . 15
For “MIM-LINK” Unit ONLY!
RF RADIO/MODEM PACKAGE..... 15
P. Modem RECEIVES but Radio Does
NOT TRANSMIT correctly..... . 16
3.6…………...Problem is suspected to be on the “DISPLAY” PC Board . . 16
For “MIM”, “MIM-LINK” or “MIM-X” UNITS
Q. Checking “U3” Chip....... 16
R. Checking “U6”, “U7”, “U8” and “U9” Chips . . . 17
S.Checking “U10” Chip....... 17
T.Checking “U11” Chip...... . 18
MIM / MIM-LINK / MIM-X Troubleshooting & Controller Repair Manual GT27072B
iii
U.Checking “U2”, “U4” and “U5” Chips.... 19
MIM / MIM-LINK / MIM-X Troubleshooting & Controller Repair Manual GT27072B
iv
Troubleshooting &
Controller Repair Manual
“MIM” & “MIM-LINK” Interface Module &
“MIM-X” Expansion Module
1.0 Purpose of this Guide
This guide is intended to assist Authorized Service Personnel in troubleshooting
and making the necessary repairs on the MIM and MIM-X Series of MAXI
Interface Modules, both “hard wired” and “wireless LINK” units. This guide is
NOT intended for field troubleshooting, although certainly some of it would be
applicable, but it is intended to be a guide for the “BOARD LEVEL” repair of the
MIM, and MIM-X modules on the bench.
This guide does not list every possible problem that may arise. It does, however,
provide the various testing procedures that are required for troubleshooting the
units at the Board Level. It should enable you to isolate the problem and thus
make the necessary repairs to eliminate the problem.
This guide also is intended to guide you in the proper sequence that should be
taken in order to isolate and determine the problem components.
2.0 Main Components of the Module
The “MIM”, “MIM-LINK”, and “MIM-X” Interface Modules consist of the
following major components:
“MIM” INTERFACE MODULE:
630815 – Display PC Board Assembly
630458 – Central Processing Unit (CPU) PC Board Assembly
630461 – Output PC Board Assembly
630832 – Transformer Assembly
MIM / MIM-LINK / MIM-X Troubleshooting & Controller Repair Manual GT27072B
1
“MIM-LINK” INTERFACE MODULE:
630815 – Display PC Board Assembly
632671 – Link Central Processing Unit (CPU) PC Board Assy.
631889 – Link Output PC Board Assembly
632444 – Link RF Package Assembly
632285 – Link Modem PC Board Assembly
630832 – Transformer Assembly
“MIM-X” INTERFACE EXPANSION MODULE:
630461 – Output PC Board Assembly
630882 – Transformer Assembly
For the layouts of these PC Boards, the Schematic Wiring Diagrams, and details
of the assemblies – refer to the drawings and data given in the Appendix of this
manual. This data will be essential in your troubleshooting and repair of the
“MIM”, “MIM-LINK” and “MIM-X” Interface Modules.
3.0 Troubleshooting of Transformer, Display PC Board, Central Processing PC
Board, Output PC Board, RF Radio Package and Modem PC Board.
A. Interface Module (MIM, MIM-LINK & MIM-X) appears to be “DEAD.
1. Check the 1.25 AMP – fast acting FUSE that is located in the power input
socket, located on the bottom of the cabinet in the left rear corner. Refer
to 630779 – cabinet sub-assembly in the Appendix.
TRANSFORMER:
2. Check Power INPUT to transformer.
120 VAC transformer 105 Volts AC Min / 129 Volts AC Max
220 VAC transformer 198 Volts AC Min / 242 Volts AC Max
240 VAC transformer 216 Volts AC Min / 264 Volts AC Max
260 VAC transformer 234 Volts AC Min / 286 Volts AC Max
MIM / MIM-LINK / MIM-X Troubleshooting & Controller Repair Manual GT27072B
2
3. Check power OUTPUT of transformer secondary – at 10-pin plug on
secondary side of transformer assembly.
¾ Between pins 1 and 2 (brown wires from transformer).
Should be 26.5 Volts AC +/-
¾ Between pins 3 and 4 (red wires from transformer).
Should be 26.5 volts AC +/-
¾ Between pins 5 and 10 (blue wires from transformer).
Should be 11.0 Volts AC +/-
¾ Between pins 8 and 9 (yellow wires from transformer).
Should be 26.5 Volts AC +/-
¾ Between pins 6 and 7 (orange wires from transformer).
Should be 26.5 Volts AC +/-
OUTPUT PC BOARD:
4. Check the same pins on plug “J2” on the OUTPUT PC Board, as outlined
above for the transformer 10 in secondary plug.
In all cases you should have the same voltage readings as outlined
above for the 10 pin secondary plug of the transformer.
5. Check across Test Points “TP1” (+5V) and “TP2” (GND).
Should have 5.0 Volts DC +/-
3.1 Problem is suspected to be on the “CPU” PC Board
CPU PC BOARD:
1. Check 0.5 AMP Slow Blow fuse “F1”.
MIM / MIM-LINK / MIM-X Troubleshooting & Controller Repair Manual GT27072B
3
Loading...