Page2of 3
Filename: oven-gpg2J.tcw
Date: 12/20/97
By:R. Fenske
OVEN-G
SCHEMATIC
5
6
7
+
-
LM324
U2
13
14
+
-
LM324
U3
R1
1N914
P1
20K
+12V
R34
1M
1M
R18
0.1
uF
C4
D2
10
9
8
+
-
LM324
U2
THERMOCOUPLE
INPUTFROM
COLUMNOVEN
R
Y
GND
U1
AD597
THERMOCOUPLE
CONDITIONER
R9
C2
1M
0.1uF
U8
R11 100OHM
1WATT
TOCOLUMNOVEN
HEATERCOIL
SWITCHED
ACHOT
INPUT
(BLUE)
SWITCHED
ACCOM
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
DETERMINESACTUALTEMPERATURE
OFCOLUMNOVEN
SUMMINGCIRCUIT
COMPARATOR
CIRCUIT:
COMPARES
THEACTUAL
TEMPERATURE
(PIN6)TOTHE
SETPOINT
TEMPERATURE
(PIN5)
R17
1K
OVENHEATINGAND
COOLINGCIRCUIT
JITTER
INPUT
DCOUTPUT
TO 'COOL2'
MUFFINFAN
6
5
7
+
-
LM324
U3
1N914
D4
U9
R15
100OHM
1WATT
R16
100OHM
1WATT
ACOUTPUTTO
'COOL1'
GRAYBLOWER
(OVENBLOWER)
SCR1
Q6004
R1
10K
R33 10K
TEMPERATUREPROGRAM 'IN'
SPADELUG
RED/WHITEWIREFROMTHE
A/DBOARD
R10
100OHM
1WATT
+12V
OVENTRIAC ISHEAT-SINK
MOUNTEDONUPRIGHTMETAL
BRACKETONLEFTSIDEOF
CHASSISFAN.
OVENHEATER IS IN
THECOLUMNOVEN.
(REDWIRE)
R13
100K
R14
2K
(0.200Vdc)
D3
1N4004
C3
10uF
R12
1M
(YELLOWWIRE)
Q1
2N3903
GREYBLOWER
30SECOND
DELAY
CONTROLSTHEGRAYBLOWER
MOUNTEDBEHINDCOLUMNOVEN
+12V
-12V
P1
20K
R30
1M
40.2K
By: J.Bassett
Rev.Date: 07/09/04
2
3
1
+
-
LM324
THELM324's INTHIS
CIRCUITOPERATE
USING+12VONPIN4
AND -12VONPIN11.
CAUTION:
HAZARDOUSVOLTAGES (ACHOTANDACCOM)
AREPRESENTONCIRCUITBOARDSWHILE
POWER ISON.
R23
100K
R21
100K
R22
9.1K
U4
+12V
(0.7Vdc)
(0.2Vac)
R24
SCR2
Q6004
1N914
D5
R20
100OHM
1WATT
U7
100OHM
1WATT
POWER INPUTSECTION
BR1
C5
RED
BLACK
"GATE"
SPADE
LUG
CONTROLSTHE MUFFINFAN
MOUNTEDABOVEGRAYBLOWER
+24v
REG.
MUFFINFAN -
24VOLTREGULATOR:
EXTERNALLYMOUNTEDON
UPRIGHTMETALBRACKET
ONTHERIGHTSIDEOFTHE
CHASSISCIRCULATIONFAN.
7824
"TOTALSETPOINT" TRIMMERPOT
OVENHEATSTATUS LED
(+)
(-)
10K
VIRT
INHIBIT
1K
R41
50V
33uF
+12V
R49
+
+
B R G Y
B R G Y
+
LOCALSETPOINTPUSHBUTTON
TOTALSETPOINTPUSHBUTTON
ACTUALPUSHBUTTON
TODISPLAY
BUFFER
DISPLAYBOARD
1N4004
D8
D9
R35 1K
PHONEJACK
PHONEPLUG
G
R
Y
B
+
-
1
2
6, 7
C
O
MOC3041
OPTOISOLATOR
MOC3041
OPTOISOLATOR
MOC3041
OPTOISOLATOR
1
2
4
6
1
2
4
6
1
2
4
6
SEECHASSIS
COOLINGFANSECTION
WHITE
RED
BLUE(ACHOT)
BLACK(ACCOM)
GREEN
28
VAC
115VAC
+
JITTER
INPUT
SEECHASSIS
COOLINGFANSECTION
R39 1K
SEEREADY
CIRCUIT
'COOL2'CIRCUIT
'COOL1'CIRCUIT
1N4004
THERMOCOUPLEAMPLIFIERCIRCUIT
BLUE(ACHOT)
BLACK(ACCOM)
