JVC HR-V506EL Service Manual page 33

B.
Cassette tape loading is unstable.
Is REG 14VA applied to PMC01 Pin 8?
YES
Is High signal applied to IC501 Pin 30
when inserting the CST?
YES
Does Low signal occur form PMC01
Pin 10 when inserting the CST?
YES
Check the Deck Mechanism.
NOTE : Auto stop may also be caused by lack of lubrication,due to dried grease or oil.
C.
Non working finction buttons.
Is the voltage of IC501 Pin 36, 5V?
YES
Does(LED Ass'y) display change
when a function button is pressed?
YES
Replace IC501.
Replace the defective switch.
NO
NO
Check the CST SW and
peripheral circuitry.
NO
Check IC501 Pins 68, 69, 70, 71.
NO
NO
Check IC506 Pins 6~14, 17, Pins 20~23
pulse output.
3-11
Check the power.
Is 5.4VA applied to R544?
YES
Check the power.
Check the power.
Replace IC506.
NO