SECTION 3 ELECTRICAL ADJUSTMENTS
Notes: 1. These adjustments are performed in the order that they are discribed. 2. Adjustment and measurement are performed for each channel unless otherwise specified. 3. Adjustment is made for right channel first and then the left channel. 4. The power voltage at the headphones section is supplied with 1.2 V. 5. The processor section is used as jig to adjust the headphones section (MDR-IF5000). 6. Adjustment is made with the RX SW board and RX PD1 and RX PD2 boards (for both L-ch and R-ch) connected to the RX board with wires (normal part). Adjustment Location:
� RX board (component side) �
1. Set the processor section (DP-IF5000) in test mode and operate the set to generate a signal of 1 kHz and �10 dB. (Refer to DP-IF5000 service manual page 7.) 2. Supply 1.2 V to between VCC and ground on the RX board. 3. Adjust RV11 (volume control) on the RX board to the minimum level. Setting:
distortion meter
RX board TP11 (L-ch) TP9 (R-ch)
+ �
1. Connect a distortion meter to TP11 (L-ch) and TP9 (R-ch) on the RX board. 2. Adjust L34 and 35 for L-ch and L54 and 55 for R-ch on the RX board so that the reading on the distortion meter is minimized.
