I agree with Phil. Transistor based radios operating on low DC voltage rarely have capacitor problems. The higher the voltage the more likely you are to have capacitor problems. It doesn't hurt to visually inspect the electrolytic capacitors and replace any that show leakage or bulging. The main problem with replacing all of the electrolytic capacitors is the cheap circuit board material used in almost all Japanese radios. The boards work OK for new assembly but not so much for repairs. The glue holding down the traces may let go if overheated. An ESR meter would be a good first non-destructive capacitor tester. There are also in circuit capacitor testers for further non-destructive testing.
73
Roger VE7LB
