Theory of Operation— 2236 Service
DMM Power Supply
The DMM power supply provides supply voltages while
maintaining circuit isolation from chassis ground.
Transformer T1801 has + 3 0 V and - 3 0 V from the
main power supply applied to its primary. The secondary is
full-wave rectified by the bridge composed of CR1801,
CR1802, CR1803, and CR1804, and capacitors Cl 903 and
Cl 904 provide filtering for the +12-V and -1 2 -V supplies
respectively. The +7.5-V supply is derived from the +12-V
supply by voltage-dropping resistor R1910 and Zener-diode
VR1901. Likewise the —7.5-V supply is derived from the
— 12.5-V supply using R1911 and VR1902.
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Summary of Contents for 2236
Page 10: ...2236 Service viii The 2236 Oscilloscope ...
Page 74: ...Theory of Operation 2236 Service 3 30 ...
Page 102: ...Performance Check Procedure 2236 Service 4 21 Figure 4 1 Test setup for DMM common mode check ...
Page 242: ...2236 Service 4204 34 Figure 9 6 CTM basic block diagram ...
Page 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 ...
Page 254: ...S I 0 O I 5 1 S O i 4204 21 C IR C U IT BOARD INTERCONNECTIONS ...
Page 267: ...1 2 3 4 5 6 7 8 9 J T K L M_ _ ___ N___l _ P____l S ...
Page 271: ...1 2 3 4 5 6 7 8 9 lO P2SO O U1 A TRIGGER V T O W2500 5 A 223 R E V A P R W G ...
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Page 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 ...
Page 317: ...A 10 C O U N T E R T IM E R M U L T IM E T E R B O A R D A D J U S T M E N T LO C A T IO N S ...
Page 319: ...2236 Service TROUBLESHOOTING GUIDE 4206 99 4204 69A ...
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Page 324: ...2 REV APR 1986 ...
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