component1.component.ts

import { Component, OnInit } from '@angular/core';
import { LoggerService } from "./logger.service";

@Component({
  selector: 'app-component1',
  template: '<app-component2></app-component2>',
  providers: [LoggerService]
})
export class Component1 implements OnInit {

  constructor(private logger:LoggerService) { }

  ngOnInit() {
    this.logger.error('component1'); //cela fonctionne
  }

}