Canon EOS 7 - Electrical Components and Their Functions

3.
ELECTRICAL COMPONENTS AND THEIR FUNCTIONS
No. Code Applicable Unit Function
1 MPU MAIN Microcomputer for camera control
2 OSCM MAIN Microcomputer’s oscillator
3 CMPU1 MAIN MPU power source (VDD) smoothing capacitor
4 CMPU2 MAIN MPU power source (VDD3) smoothing capacitor
5 CMPU5 MAIN MPU power source (VDD) smoothing capacitor
6 CMPU6 MAIN MPU power source (VDD3) smoothing capacitor
7 CVRH2 MAIN Standard power source-stabilizing capacitor
8 CLREQ MAIN Signal-stabilizing capacitor
9 RVRH MAIN Standard power source-stabilizing resistor
10 RPTIN MAIN PTIN detection resistor
11 ROSCM MAIN Oscillator circuit resistor
12 RLREQ MAIN Signal-stabilizing resistor
13 EEPROM MAIN Data memory IC
14 CEE MAIN EEPROM capacitor
15 EMI1 MAIN MPU power source (VDD) EMI filter
16 EMI2 MAIN MPU power source (VDD3) EMI filter
17 RAE MAIN AE sensor operation-stabilizing resistor
18 CAE MAIN AE sensor operation-stabilizing capacitor
19 OPAMP1 MAIN DAC voltage conversion OPAMP
20 CAMP MAIN OPAMP1’s smoothing capacitor
21 CDA1 MAIN MPU’s DAC output-stabilizing capacitor
22 CDA2 MAIN MPU’s DAC output-stabilizing capacitor
23 RDA1 MAIN OPAMP’s standard voltage-dividing resistor
24 RDA2 MAIN OPAMP’s standard voltage-dividing resistor
25 RDA3 MAIN OPAMP1 operation-stabilizing resistor
26 RDA4 MAIN OPAMP1 gain-determining resistor
27 RDA5 MAIN OPAMP1 gain-determining resistor
28 RDA6 MAIN OPAMP operation-stabilizing resistor
29 DXON MAIN DX-reading control transistor
30 CDX1 MAIN DX terminal noise-countering capacitor
31 CDX2 MAIN DX terminal noise-countering capacitor
32 CDX3 MAIN DX terminal noise-countering capacitor
33 CDX4 MAIN DX terminal noise-countering capacitor
34 CDX5 MAIN DX terminal noise-countering capacitor
35 RDX1 MAIN DX terminal pull-up resistor
36 RDX2 MAIN DX terminal pull-up resistor
37 CE2 MAIN E2 system-stabilizing capacitor
38 TRBC MAIN Battery check load-applying transistor
39 RBC1 MAIN Battery check load resistor
40 RBC2 MAIN Battery check load current-measuring resistor
41 RBC3 MAIN Transistor driving resistor
42 COMPIC MAIN FLED drive control comparator
43 GATEIC MAIN FLED drive circuit logic
44 TRFLED MAIN FLED drive FET
45 CFLED1 MAIN Power source-stabilizing capacitor for FLED drive
control circuit
46 CFLED2 MAIN Power source-stabilizing capacitor for FLED drive
control circuit
47 RFLED1 MAIN FLED drive control resistor
Part 2: Technical Information
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