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Maintenance— 2236 Service
Set:
Channel 1 Input Coupling
AC
UPPER FUNCTIONS-
LOWER FUNCTIONS
IN (single pass)
OUT (looping pass)
Test 1— ROM Checksum
This test calculates the checksums of the two ROMs and
compares them to the checksum values stored in the
ROMs. This is equivalent to the Power-UP ROM check.
To start the test, set the Channel 1 Input Coupling switch
to either GND or DC position. The readout will display
“tl ZZZZ Y” where “ZZZZ” represents either the word
“PASS” or an error code. See Table 6-7 for an exolanation
of the test message (in looping mode the test message will
blink as the test repeats).
Table 6-7
Test 1-ROM Check Test Messages
Test Message
Explanation
“ZZZZ”
PASS
Test pass
F-01
8K ROM is bad
F-02
2K ROM is bad
F-03
Both ROMs are bad
Test 2— Counter
This test is equivalent to the Power-Up Counter check
and starts by resetting the counter circuitry. If the counter
circuitry resets successfully, a sequence of pulses (internally
derived test signals) is applied to the Sample counter to
verify that the first 12 stages of the 23 stages perform cor
rectly (the Extended Counter Test checks the last 11
stages). If the first 12 stages are performing correctly, the
counter circuitry is again reset, to verify that it will reset
properly. If the counter circuitry resets properly, a basic
functional check is made of the Time counter. The Time
counter counts up nearly to its maximum count and then
compares this count against predetermined limits. At vari
ous points in the counter test procedure, the counter status
line (BUSY line) is checked for correctness.
To start the test, set the Channel 1 Input Coupling switch
either to GND or DC position. The readout will display
“t2 ZZZZ Y” where “ZZZZ” represents either the word
“PASS” or an error code. See Table 6-8 for an explanation
of the test message (in looping mode the display on the
readout will blink as the test repeats).
6-13
Содержание 2236
Страница 10: ...2236 Service viii The 2236 Oscilloscope ...
Страница 28: ...Specification 2236 Service 1 18 ADD JAN 1985 Figure 1 2 Physical dimensions of the 2236 Oscilloscope ...
Страница 74: ...Theory of Operation 2236 Service 3 30 ...
Страница 75: ...Theory of Operation 2236 Service Figure 3 13 Typical waveforms for the Delta Time function with Valt HI 3 31 ...
Страница 102: ...Performance Check Procedure 2236 Service 4 21 Figure 4 1 Test setup for DMM common mode check ...
Страница 240: ...2236 Service CTM INTERFACE SIGNALS F ig u re 9 4 O s c illo s c o p e b a sic b lo c k diag ram 4294 46 ...
Страница 241: ... VERT DEFL 2236 Service 4 2 0 6 3 5 4 2 0 4 4 7 F ig u re 9 5 O scillo sco p e d e ta ile d b lo c k diag ram ...
Страница 242: ...2236 Service 4204 34 Figure 9 6 CTM basic block diagram ...
Страница 243: ...DMM POWER S U P P LIE S 2236 Service F ig u re 9 7 C T M d e ta ile d b lo c k diag ram ...
Страница 253: ...A10 COUNTER TIMER MULTIMETER BOARD F ig u re 9 8 C irc u it b o a rd lo c a tio n Illu s tra tio n ...
Страница 254: ...S I 0 O I 5 1 S O i 4204 21 C IR C U IT BOARD INTERCONNECTIONS ...
Страница 255: ...2 2 3 6 S e rv ic e A ll c o m p o n e n ts on th e A 2 A tte n u a to r b o a rd are lo c a te d on D ia g r a m ...
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Страница 313: ...2236 Service T O U I 3 0 0 4 8 K T O UI300 II S K 0 2 2 3 6 Z Z O A Z 2 OPTION IA ...
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Страница 319: ...2236 Service TROUBLESHOOTING GUIDE 4206 99 4204 69A ...
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Страница 324: ...2 REV APR 1986 ...
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