Akai CFT2716 Service Manual page 3

3. To be sure that not shock hazard exists, a check for the presence of leakage current should be
made at each exposed metal part having a return path to the chassis (antenna, cabinet metal,
screw heads knobs and/or shafts, escutcheon, etc.) in the following manner.
Plug the AC line cord directly into a 120V, AC receptacle. (Do not use an Isolation Transformer
during these checks.) All checks must be repeated with the AC line cord plug connection reversed. (If
necessary, a nonpolarized adapter plug must be used only for the purpose of completing these checks.)
If available, measure current using an accurate leakage current tester. Any reading of 0.35mA or
more is excessive and indicates a potential shock hazard which must be corrected before returning the
receiver to owner.
If a reliable leakage current tester is not available, this allernate method of measurement should be
used. Using two clip leads, connect a 1500 Ohm, 10 watt resistor paralleled by a 0.15uF capacitor in
series with a known earth ground, such as a water pipe or conduit and the metal part to be checked. Use
a VTVM or VOM with 1000 Ohms per Volt, or higher, sensitivity to measure this AC voltage drop
across the resistor,. Any reading of 0.35 volt RMS of more is excessive and indicates potential shock
hazard which must be corrected before returning he receiver to the owner.
PLEASE READ BEFORE ATTEMPTING SERVICE
1. Use an Isolation Transformer when performing any service on this chassis.
2. Never disconnect any leads while receiver is in operation.
3. Disconnect all power before attempting an repairs.
4. Do not short any porsition of the circuit while the power is on.
5. For safety reasons, replacing any components should be according with identical replacement
parts (SEE PARTS LIST).
6. Before testing, warm up the TV for at least 30 minutes and demagnetize the CRT with an
external degaussing coil.
7. When removing a PCB or related component, after unfastening or changing a wire, be sure to
put the wire back in its original position.
8. Inferior silicon grease can damage IC's and transistors. When replacing IC's and transistors, use
only specified silicon grease,. Remove all old silicon when applying new silicon.
9. Before removing the anode cap, discharge eiecticity because it contains high voltage.
ALIGNMENT PROCEDURES