Inhibit Voltage Measuring Procedure; Preparation Of Resistance Part; Total Resistance Checking Procedur - Canon EOS DIGITAL REBEL XTI Service Manual

Appendix
1. INHIBIT VOLTAGE MEASURING PROCEDURE
We hereby provide you with supplementary explanation for preparation of the tool battery
used for residual battery display and measurement of power current consumption.
Service Manual mentions "0.40 ohm" only; however, this 0.40 ohm actually means total
resistance including wire resistance and contact resistance or equivalent value to battery's
internal resistance. Therefore, we introduce the procedures for tool battery preparation and
measurement of total resistance.
1. 1 Preparation of Resistance Part
1 ) What to prepare
(1) Film case
(2) Probe
(3) Joint plug
X1
X1
X1
(4) 0.5 ohm, SW resistance
X
2 (Bundled with CY9-11 01-000 TOOL BATTERY PROBE KIT)
2 ) Procedure
(1)
Prepare above parts.
(2) Make holes in the cover and the bottom of the film case to attach plugs. Insert the joint
plug [A'] into the bottom hole and fix it with supplied washer from inside.
(3) Solder two 0.5 ohm resistances in parallel together, place it inside the film case and
solder the end of the resistance [A] to the joint plug [A'] inside the film case
(4) Solder the other side of the resistance [B] to the probe [B'] inside the film case.
A
Solder in parallel together.
B
1. 2 Total Resistance Checking Procedur
Here is the procedure to make sure that the resistance part and the tool battery make
0.41-0.49 ohm (target of 0.45 ohm).
1 ) What to prepare
(1)
CY9-7121-000 BATTERY CHECKER
X
1
(2) BATTERY CHARGER CB-2LT
X
1
(3) Constant voltage power source
(4) Tester
(5) Resistance part
(6) Tool battery CY9-7125
1
X1
X1
X1
X1
CY9-7125