Fluke 5700A Series - Page 68

5700A/5720A Series II Calibrator
Service Manual
2-2
2-36. Glue Logic.................................................................................... 2-25
2-37. RAM (Random-Access Memory) ................................................ 2-25
2-38. ROM (Read-Only Memory)......................................................... 2-25
2-39. Electrically-Erasable Programmable Read-Only Memory
(EEPROM)................................................................................... 2-26
2-40. DUART (Dual Universal Asynchronous Receiver/transmitter)
Circuit........................................................................................... 2-26
2-41. Clock/Calendar Circuit................................................................. 2-26
2-42. Clock Filter Circuit ...................................................................... 2-27
2-43. CPU to Rear Panel Interface ........................................................ 2-27
2-44. CPU to Front Panel Interface ....................................................... 2-27
2-45. Fan Monitor.................................................................................. 2-27
2-46. Front Panel Assembly (A2) .............................................................. 2-28
2-47. Clock Regeneration Circuitry ...................................................... 2-28
2-48. Refresh Failure Detect Circuitry .................................................. 2-28
2-49. Decoding and Timing Circuitry ................................................... 2-28
2-50. Control Display Circuitry............................................................. 2-29
2-51. Output Display Circuitry.............................................................. 2-30
2-52. Keyboard Scanner Circuitry......................................................... 2-31
2-53. Knob Encoder Circuitry ............................................................... 2-31
2-54. Led Circuitry ................................................................................ 2-32
2-55. Keyboard Assembly (A1)................................................................. 2-32
2-56. Analog Section Detailed Circuit Description ....................................... 2-33
2-57. Filter/PA Supply (A18), Low-voltage Filter/Regulator Section ...... 2-33
2-58. Unregulated OSC Supplies .......................................................... 2-34
2-59. Unregulated LH Supplies............................................................. 2-34
2-60. Unregulated S Supplies................................................................ 2-34
2-61. Triac Circuit ................................................................................. 2-34
2-62. FR1 Supplies ................................................................................ 2-34
2-63. Unregulated FR1 Supply.............................................................. 2-34
2-64. FR2 Supplies ................................................................................ 2-35
2-65. Filter/PA Supply (A18), Power Amplifier Output Supply Section .. 2-35
2-66. ±PA Supplies Digital Control ...................................................... 2-35
2-67. ±250V and ±500V Supplies ......................................................... 2-37
2-68. +PA and -PA Supplies ................................................................. 2-37
2-69. ±PA Supply Current Limit ........................................................... 2-37
2-70. Regulator/Guard Crossing Assembly (A17)..................................... 2-38
2-71. Voltage Regulator Circuitry......................................................... 2-38
2-72. Regulated OSC Supplies.............................................................. 2-38
2-73. Regulated LH Supplies ................................................................ 2-39
2-74. Regulated S Supplies ................................................................... 2-39
2-75. FR1 Supply .................................................................................. 2-40
2-76. FR2 Supply .................................................................................. 2-40
2-77. Guarded Digital Control Circuitry ............................................... 2-41
2-87. Switch Matrix Assembly (A8).......................................................... 2-43
2-88. Switch Matrix Digital Control ..................................................... 2-44
2-89. Switch Matrix Operation: 11V DC and 22V DC Ranges ............ 2-46
2-90. Switch Matrix Operation: 2.2V AC and 22V AC Ranges ........... 2-48
2-91. Switch Matrix Operation: 220V AC and DC Ranges .................. 2-48
2-92. Switch Matrix Operation: 2.2V DC Range .................................. 2-51
2-93. Calibration of the 2.2V Range ..................................................... 2-53
2-94. Switch Matrix Operation: 220 mV DC Range............................. 2-53
2-95. Switch Matrix Operation: 220 mV AC Range............................. 2-56
2-96. Switch Matrix Operation: 2.2 mV and 22 mV AC Ranges.......... 2-56
2-97. Calibration of the mV Ranges...................................................... 2-56