HEIDENHAIN TNC151B - Page 15

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DR. JOHANNES HEIDENHAN GmbH
D-8225 Traunreut .Tel. (08669) 31-O
SERVICE MANUAL TNC 151/155
Page 13
Kundendienst
Section 2.2.2
VDU Display (flashing)
CHECK-SUM ERROR
to
CHECK-SUM ERROR
II II
to
CHECK-SUM ERROR
II "
to
CHECK-SUM ERROR
11 II
I II
xx00
XXOF
xx10
XXlF
XXZB
XX2F
xx40
xx41
XX42
xx43
XXFF
xx30
xx31
t
Fault cause
CRC CHECK-SUM error with EPROM 3
XX = correct CHECK-SUM value
00 = code for faulty EPROMs
CRC CHECK-SUM error with EPROM 3
II n n II
with EPROM 4
CRC CHECK-SUM error with EPROM 4
II II II II
with EPROM 5
CRC CHECK-SUM error with EPROM 5
n II I II
with EPROM 2
CRC CHECK-SUM error in RAM area on the
CLP Processor/Graphics Board in which a
part of the operating program is stored
CRC CHECK-SUM error with EPROM 2
CRC CHECK-SUM error in the RAM area on the
CLP Processor/Graphics Board where part of
the operating program is stored
CRC CHECK-SUM error with PLC RAM
PLC Program from addr. O-IOOOH (virtual adds.
30000-3OFFFH) in PLC-EPROM/PLC-RAM
PIG Program from addr. lOOO-FFECH (virtual
addr. 31000-3FFECH) in PLC-EPROM/PLC-RAM
Possible fault location
Main Processor Board
Main Processor Board
Main Processor Board
Main Processor Board
Main Processor Board
Main Processor Board
CLP Processor/Graphics Board
CLP Processor/Graphics Board
CLP Processor/Graphics Brd. (export vers.)
CLP Processor/Graphics Brd. (export vers.)
Main Processor Board
Main Processor Board
Main Processor Board