Block Diagram - Vulcan-Hart A-130 Service Manual

SECTION - TROUBLESHOOTING - -STAGE

. BLOCK DIAGRAM

90-264V
Switching
60/50Hz
Power Supply
+12V
Pg 5-9
U1, U2
Thermocouple
Zero Crossing
AMP U1
U9
U4
U8
Multiplexed A/D
Microprocessor
Motor Drive
M
Pg 5-11
D1 + RT1
Pg 5-11
Cold Jct. Ref Temp
U6
Peripheral
Membrane Switches
Pg 5-10
Pg 5-9
Drive
K1, K2
Display Board
Muffle Relays
Pg 5-9
16 Character LCD
Triac driver
U2
U1
Pg 5-9
Serial to LED Driver
Parallel (10)
Sonar
5 – 8