Sony MDR-NC60 Service Manual page 11

Procedure:
– L-CH –
1. Connect an audio analyzer (impedance: 600 Ω) to the capacitor of TP913 and lead wire of TP2.
2. Connect the audio analyzer to the lead wire of TP2 and the lead wire of TP3.
3. Put the housing (L-CH side) on flat table.
4. Sway and press softly the housing so that the contact surface of ear pad is sealed. (Do not press very strong)
5. Put a weight (150 g) on the housing. (figure 5)
6. Input the signal (2 kHz, –26 dBv) from the audio analyzer.
7. Adjust RV1 so that the level of between TP2 and TP3 is –26.5 dBv.
– R-CH –
8. Connect an audio analyzer (impedance: 600 Ω) to the capacitor of TP930 and lead wire of TP102.
9. Connect the audio analyzer to the wire of TP102 and the wire of TP103.
10. Put the housing (R-CH side) on flat table.
11. Sway and press softly the housing so that the contact surface of ear pad is sealed. (Do not press very strong)
12. Put a weight (150 g) on the housing. (figure 5)
13. Input the signal (2 kHz, –26 dBv) from the audio analyzer.
14. Adjust RV101 so that the level of between TP102 and TP103 is –26.5 dBv.
Figure 5
weight (150 g)
housing
MDR-NC60
11