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1-2 (No.XC063)

SECTION 1

PRECAUTION

This service manual does not describe PRECAUTION.

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe 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

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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