Service manual

70304901 45
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Micro Display Control (MDC) Troubleshooting
Unit Will Not Heat – Electric (T30 Models Only)
TMB1990S
L3 L2
L1
SERVICE
CONNECTION
TB3
1
2
3
4
BLK/
WHT
BLK/
WHT
PRIMARY
FUSES
AGC-2A
250V
BLK
BLK
1
2
HEATING ELEMENTS
SECONDARY
FUSE
MDL-3.5A
250V
M
FAN MOTOR
CENTRIFUGAL
SWITCH
DOOR
SWITCH
WHT
CHASSIS GROUND
WHT
LINT
DRAWER
SWITCH
AIR FLOW
SWITCH
RED
RED
RED/WHT
N.O.
COM COM
N.O.
BRN/RED
WHT
ORG/BRN
COM
N.O.
ORG BRN
ORG/
WHT
WHT/
BRN
BRN/WHT
N.C.
BLK
THERMISTOR
M
14
13
RED/BLU
WHT
RED/WHT
RED/BLK
WHT/VLT
WHT
RED/BLK
RED/BLK
RED
WHT/BLU
SECONDARY
FUSE
1.25 T
250V
RED
RED
WHT
GRN/YEL
WHT
12345678910
WHT
WHT
THERMISTOR
BLK
WHT
H4
CABINET
LIMIT
THERMOSTAT
STOVE
LIMIT
THERMOSTAT
VLT
VLT/WHT
TB1-L3
TB1-L2
TB1-L1
SEE
TRANSFORMER
CONFIGURATION
JUMPER
HC2
L3
T3 T1
L1
HC2
HC1
HC2
HC1HC1
L3
T3
H3 H5
L2
T2
L2
T2
H2 H4
L1
T1
H1
H6
24V
4.0A
24V
1.5A
12 3 45 6
HC1
HC2
3
5
5
TEMP. REGULATING
HEAT RELAY
CIRCUIT CONTROLS
3 215
FS-2
H2-1
4N25
24Vac Ret
24Vac
MACHINE RUNNING
H6
3
APPLICATION DETAIL
SEE VEND
H5
7468 1291011
COIN DROPS
H1-4
H1-2
21654
6
7
Vmax=28Vdc Imax=5ma
H3
5
4
3
HEAT RELAY
MOTOR RELAY
START PULSE INPUT
AVAILABLE OUTPUT
TIME 20msec MIN. Iin= 3-30ma H3-1 & H3-2
OPTO OFF WHEN H3-3 & H3-4
MDC CONTROL
120Vac - 6.8K ohm 5 watt 24Vac - WIRE JUMPER 240Vac - 13.6K ohm 10 watt JUMPER H2-2 TO H2-5 AS FOLLOWS: VOLTAGE CONFIGURATION INPUT
H2-2
H2-5
SUPPLY
POWER
CONTROL
CLOSED & SWITCH IS PRESSED
RELAY ONLY WHEN DOOR IS
CONTROL TO TURN ON MOTOR DOOR SENSING CIRCUIT ALLOWS
24Vac Ret
24VAC
H1-1
H1-3
9
H4
10 678
1/4 watt
12
100 OHM
H11L1
FS-1
H2-4 H2-3
Door Sense Ret
H2-6
3 241
1
14
7
846
10 12
13
5
2
3
11
17
16
18
15
9