Repairing a RCA 480

[zhakrin]

A friend just called me up about his 480 stopping working and asked if I could fix it up for him.

Being a little bored at the moment i figured i would give it a shot.

I opened up the box to find that the fuses are perfectly fine however there are a few blown resistors.

The blown parts are as followed (as labeled on the circuit board)

CR14103
R14112
R14110 (I think, next resistor towards the control panel from R14112, carbon scoring has obscured the text)
R14103

With possibly blown resistors at 14113 and 14111


What i am wondering is where can i find the OHMs raitings for these resistors as well as where i can get them (I am in the Northwest Toronto area).

Zhak

[zhakrin]

Ok i found the 420 scematic and think i have them figured out, as follows


CR 14103 --- Found in spec, what is it?

R14112 ---- 1K0 Resistor
R14110 ---- 22R0 Resistor
R14103 ---- 2K4 Resistor


R14113 ---- 100R0 Resistor
R14111 ---- - Resistor - Not sure, says 5%? on spec

[jasjas]

CR14103 - 1N4148 S.M. Diode R14111 ---- - Resistor ?

[zhakrin]

CR14103 - 1N4148 S.M. Diode
R14111 ---- - Resistor ?



Yea, on the 420 scematic the R14111 just has the Resistor symbol with a 5 pointed star beside it, underneith it has a period and underneith that it has 5%

Section F7 on page 3 of the 420 scematic thats available from mrwhite and other place.

[rush]

working on a 420 myself with no power can some tell me the voltage or reading you should get on the Q14100.....