Service Manual

Canon NEW F-1 Service manual
Page 46
Assembly and Adjustment Notes
6.3 Reference
7. VR GAIN (VR 2) Adjustment
7.1 Mount the tool standard FD5C/1.4, standard focusing screen (PE) and pentaprism.
7.2 Check the output at #3 (Fig. 3) with the light source at EV 9 and EV 15 and record
the values as V EV9 and V EV15.
7.3 Adjust VR 2 so that the difference between V EV9 and V EV15 is equal to VC/30x6
(±2mV)
8. VR AV (VR 7) Level Adjustment
8.1 Set the shutter speed to 1/60 (TVS=6) and the light
source to EV 12.
8.2 Measure the output at #1 (Fig. 4) and adjust VR 7
until the output (V AV) is equal to VC (±2mV).
(This is V AV9.)
8.3 Set the shutter speed to 1/8 (TVS=3)
8.4 Measure the output at #1 again. It should equal
1.3333VC±19mV. (This is V AV9.)