Sony MDR-NC500D Servise Manual page 11
Noise canceling headphones
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Also See for MDR-NC500D:
- User manual ,
- Product information (88 pages) ,
- Operating instructions manual (27 pages)
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2 Canceling Gain Adjustment
Procedure:
1. Remove the resistors (39 Ω) from TP182, TP183.
2. Remove the resistors (39 Ω) from TP282, TP283.
3. Connect the lead wires of CHARGER board (SP101) to the TP182 (dark blue), TP183 (red/dark blue). (Refer to Fig. 4)
4. Connect the lead wires of SP201 to the TP282 (natural), TP283 (red). (Refer to Fig. 4)
5. Remove the one side of resistor (22 kΩ) of TP284, and connect to TP184. (Refer to Fig. 4)
6. The screw is closes into the hole (two places) where housing (R-CH side) is fi xed. It closes it so that air should not leak. (Refer to Fig.
5)
Note: The problem is not in this hole even if it closes it with not the screw but clay, tape and so on. The hole is completely closed with stability so as not to
do the air leak.
7. Remove the R111 (0 Ω) and R211 (0 Ω).
8. Connect a capacitor (100 µF) to the TP103.
Red/
Dark Blue
CHARGER board
(SP101)
Dark Blue
adjustment parts
Natural
TP282
SP201
TP283
Red
– MAIN Board (Side B) –
RV282
Do not touch in
this adjustment.
TP183
TP182
TP284
R211
RV101
RV182
RV201
TP184
R111
TP103
TP478
Fig. 5
SL201
TP203
100 µF
22 kΩ
600 Ω
SL101
100 µF
Fig. 4
hole for R-CH side housing fixation
(completely closes it with screw,
clay, tape and so on)
MDR-NC500D
audio analyzer
A
OUT
330 Ω
output impedance: 600 Ω
270 Ω
signal: 220 Hz, –26 dBv
B
IN
11
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