Page2of 2
Filename:
dual oven-g#2pg2.tcw
Date: 12/20/97
By:R. Fenske
DUALOVEN-G#2
SCHEMATIC
5
6
7
+
-
LM324
U2
13
14
+
-
LM324
U3
R1
1N914
20K
+12V
DISPLAYBOARD
LOCAL SETPOINT:
(PUSHBUTTON)
GREENAND
REDWIRES
OFPHONE
CABLE FROM
DISPLAYBD.
J1
R34
1M
1M
R18
0.1
uF
C4
D2
1
3
4
5
10
2
8
7
6
9
10
9
8
+
-
LM324
U2
THERMOCOUPLE
INPUT FROM
COLUMNOVEN
R
Y
GND
U1
AD597
THERMOCOUPLE
AMPLIFIER
+12V R9
C2
1M
0.1uF
U8
MOC3030
(220V-MOC3041)
R11
100OHM
1WATT
ACOUTPUTTO
COLUMNOVEN
HEATERCOIL
SWITCHED
ACHOT
INPUT
(BLUE)
SWITCHED
ACC
INPUT
(BROWN)
J1
12
R19
10K
12
13
14
+
-
LM324
U2
R3 5.1M
10K
R2
10K
R7
3
2
1
+
-
LM324
U2
10K
R8
THERMOCOUPLE
AMPLIFIERCIRCUIT:
DETERMINESACTUAL
TEMPERATUREOF
COLUMNOVEN
SUMMINGCIRCUIT:
ADDSALL INPUTS
TOGETHER
COMPARATOR
CIRCUIT:
COMPARES
THEACTUAL
TEMPERATURE
(PIN6) TOTHE
SETPOINT
TEMPERATURE
(PIN5)
ACSWITCHING
CIRCUIT:
SWITCHESACTO
OVENHEATERTO
ACHIEVEDESIRED
TEMPERATURE
BLACKWIREOF
PHONECABLE
TODISPLAYBD.
"LED"
DISPLAY
BOARD
OVEN
HEAT
R17
1K
J1
LEDDRIVERCIRCUIT:
PROVIDESVISUAL
VERIFICATIONOF
OVENHEATER
FUNCTIONS
YELLOWWIREOF
PHONECABLE
TODISPLAYBD.
"ACTUAL"
(PUSHBUTTON)
OVENHEATINGAND
COOLINGCIRCUIT
JITTER
INPUT
DCOUTPUT
TO 'COOL2'
MUFFINFAN
6
5
7
+
-
LM324
U3
1N914
D4
1
3
4
5
2
6
U9
MOC3030
(220V-MOC3041)
R15
100OHM
1WATT
R16
100OHM
1WATT
ACOUTPUTTO
'COOL1'
GRAYBLOWER
(OVENBLOWER)
SCR1
Q6004
SWITCHED
ACHOT
INPUT
(BLUE)
SWITCHED
ACC
INPUT
(BROWN)
J1
PHONEJACK
R1
10K
R33 10K
TEMPERATUREPROGRAM 'IN'
SPADE LUG
RED/WHITEWIRE FROM THE
A/DBOARD
R10
100OHM
1WATT
+12V
THEOVENTRIAC ISHEAT
SINKMOUNTEDONTHE
UPRIGHTMETALBRACKET
ONTHELEFTSIDEOFTHE
CHASSISCIRCULATIONFAN.
THEOVENHEATER IS IN
THECOLUMNOVEN.
(REDWIRE)
SWITCHED
ACHOT
INPUT
(BLUE)
REDWIREOF
PHONECABLE
TODISPLAYBD.
"TOTAL SETPOINT"
R13
100K
R14
2K
(0.200Vdc)
D3
1N4004
C3
10uF
R12
1M
1N4004
1N4004
D8
D9
R35
1K
(YELLOWWIRE)
Q1
2N3903
GREYBLOWER
30SECOND
DELAY
COOL1CIRCUIT:
CONTROLSTHE
GRAYBLOWER
MOUNTEDBEHIND
THECOLUMNOVEN
+12V
-12V
P1
20K
R30
1M
40.2K
By:M.Watts
Rev.Date: 7/18/03
2
3
1
+
-
LM324
THELM324's INTHIS
CIRCUITOPERATE
USING+12VONPIN4
AND -12VONPIN11.
CAUTION:ACHOTAND
ACCAREHAZARDOUS
VOLTAGESANDARE
PRESENTONTHISAND
OTHERCIRCUITBOARDS
WHILETHEG.C.
POWER ISON.
R23
100K
JITTER
INPUT
R21
100K
R22
9.1K
U4
+12V
(0.7Vdc)
(0.2Vac)
R24
SCR2
Q6004
1N914
D5
R20
100OHM
1WATT
1
3
4
5
2
6
U7
MOC3030
(220V-MOC3041)
100OHM
1WATT
28 VOLTSAC
FROMPOWER
SUPPLYSECTION
WHITEWIRE
28 VOLTSAC
FROMPOWER
SUPPLYSECTION
REDWIRE
ac
ac
-
+
BR1
C5
RED
BLACK
1
3
4
5
2
6
"GATE"
SPADE
LUG
COOL2CIRCUIT:
CONTROLSTHE
MUFFINFAN
MOUNTEDABOVE
THEGRAYBLOWER
+24v
REG.
MUFFINFAN -
24VOLTREGULATOR:
EXTERNALLYMOUNTEDON
UPRIGHTMETALBRACKET
ONTHERIGHTSIDEOFTHE
CHASSISCIRCULATIONFAN.
7824
"TOTALSETPOINT" TRIMMERPOT
STATUS
LED
(+)
(-)
+12V
1K
R39
SETPOINTCIRCUIT:
USERADJUSTSTO
SETOVEN
TEMPERATURE
1K
R41
SEE
READY
CIRCUIT
50V
10uF
SEEREADY
CIRCUIT
10K
R49
