Sony MDR-IF5000 Service Manual page 19

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).
0 dB=0.775 V
Tuning Adjustment
Preparation:
processor
(DP-IF5000)
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:
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.
SECTION 3
ELECTRICAL ADJUSTMENTS
headphones
(MDR-IF5000)
distortion meter
+
–
– 6 –
Adjustment Location:
TP9
TP11
L34
TUNING
ADJUSTMENT
L35
(L-ch)
L54
TUNING
ADJUSTMENT
L55
(R-ch)
– RX board (component side) –