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(No.XC063)1-3

3.1

Removing the housings(L)/(R) 

(1) Remove the ear pads(L)/(R) and ear pad holders(L)/(R).

* When attaching the ear pad holders, be careful as the left and right parts are different.

(2) Remove the eight screws 

A

 attaching the housings(L)/(R).

3.2

Removing the Lch board / Rch board

* Remove the housings(L)/(R).

(1) Remove the four screws 

B

 attaching the Lch board / Rch board.

(2) Unsolder the wires connected to each board, and then remove each wire.

* When soldering the wires, be careful with the polarity of the wires. (Refer to the wiring diagram)

3.3

Removing the microphones(L)/(R)

• Remove the housings(L)/(R) and the Lch board / Rch board.

(1) Remove the four screws 

C

 attaching the speaker units(L)/(R), and then remove the speaker units(L)/(R).

(2) Peel off the seal from the baffle plates(L)/(R), and then remove the microphones(L)/(R).

3.4

Removing the hangers(L)/(R)

• Remove the housings(L)/(R).
• Unsolder the wires connecting from the head band to each board.

(1) Remove the four screws 

D

 attaching the hanger covers(L)/(R), and then remove the hanger covers(L)/(R).

(2) Rotate the hanger 90 degrees. (It become the state of "Flat foldable" as shown in the figure below.)

(3) The hanger can be removed by folding and pressing the hanger and head band as shown in the picture.
(4) When attaching, perform the reverse procedure.

Right

Left

Normal

Flat foldable

Head band

Hanger

Summary of Contents for HA-NC250-J

Page 1: ...02 dB 1 mW power ON 100 dB 1 mW power OFF Input impedance 40 Ω power ON 96 Ω power OFF Driver unit Ø40 mm Power supply AAA battery DC 1 5 V x 1 Battery life Approx 20 hours using Manganese AAA battery Approx 50 hours using Alkaline AAA battery Varies depending on operating conditions Without ambient noise Cord length 1 2 m 3 9 ft detachable Mass 150 g 5 30 oz incl battery 140 g 4 94 oz excl batter...

Page 2: ... SPECIFIC SERVICE INSTRUCTIONS SECTION 3 DISASSEMBLY R L e f e f g g a b c c d d b a h h Hanger L Hanger R Head band Hanger cover L Hanger cover R Ear pad holder L Ear pad L Ear pad holder R Ear pad R Microphone L Microphone R Housing L Housing R Seal Seal Lch board Rch board D D A A A A Speaker unit L Speaker unit R Baffle plate L Baffle plate R C C C C B B B ...

Page 3: ...phones L R Remove the housings L R and the Lch board Rch board 1 Remove the four screws C attaching the speaker units L R and then remove the speaker units L R 2 Peel off the seal from the baffle plates L R and then remove the microphones L R 3 4 Removing the hangers L R Remove the housings L R Unsolder the wires connecting from the head band to each board 1 Remove the four screws D attaching the ...

Page 4: ...CTION 5 TROUBLESHOOTING 5 1 Assembly precautions of power switch knob When replacing the power switch knob place the nonwoven fabric provided with the power switch knob over the slide switch on the Rch board as shown in the picture and then attach the housing Rch board and Lch board VR1 Medium Minimum Maximum Rch board Nonwoven fabric On the slide switch Victor company of Japan Limited ACCESSORIES...

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