Sony MDR-NC500D User Manual

MDR-NC500D

SERVICE MANUAL

Ver. 1.2 2008.10

SPECIFICATIONS

General

Type Closed dynamic Driver unit 40 mm, dome type (CCAW adopted) Power handling capacity 100 mW Impedance 40 Ω at 1 kHz Sensitivity 102 dB/mW Frequency response 5 - 24,000 Hz Total Noise Suppression Ratio*1 Approx. 20 dB Power source DC 3.7 V: Built-in lithium-ion

2 × LR6 (size AA) batteries, or AC power adaptor Mass Approx. 195 g (6.9 oz)

Supplied accessories

Connecting cord (0.5 m, gold plated stereo mini plug) (1) Connecting cord (1.5 m, gold plated L type stereo mini plug) (1) Connecting cord with battery case (1) Carrying case (1) Plug adaptor for in-ﬂ ight use*3 (single/dual) (1) Gold-plated unimatch plug adaptor (stereo phone plug y stereo mini jack) (1) Sony LR6 (size AA) batteries (2) (US and Tourist models) AC power adaptor (1) Operating Instructions (1) Product Information (1) Startup guide (1) Card warranty (1)

Under the Sony measurement standard. For details about the Total Noise Suppression Ratio amount for each mode, refer to the Product Information booklet.

Equivalent to approx. 99 % reduction of energy of sound compared

with not wearing headphones

(NC MODE A).

May not be compatible with some in-ﬂ ight music services.

rechargeable battery,

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Chinese Model

Tourist Model

General charging and usage time Charging time Usage time

Approx. 3 hours *2 Approx. 15 hours

At 1 kHz, 0.1 mW + 0.1 mW output

Hours required to fully charge an empty battery

Time stated above may vary, depending on ambient temperature or

conditions of use.

Battery life Battery type Approx. hours

Sony Alkaline 10 hours LR6 (size AA) battery

Output at 1 kHz, 0.1 mW + 0.1 mW

Time stated above may vary, depending on ambient temperature or

conditions of use.

Note (US and Tourist models)

Because the supplied battery was included in the package from the time of manufacture (as a convenience to the user), it is possible that the battery life may be somewhat depleted by the time of purchase. The actual life of the supplied battery may be shorter than the standard time described in this manual when using a fresh battery.

Design and speciﬁ cations are subject to change without notice.

9-889-146-03

2008J05-1

2008.10

Sony Corporation

Audio&Video Business Group Published by Sony Techno Create Corporation

NOISE CANCELING HEADPHONES

MDR-NC500D

Ver. 1.2

NOTES ON CHIP COMPONENT REPLACEMENT

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Note

• Use the AC power adaptor supplied with this unit. Do

not use any other AC power adaptor since it may cause the unit to malfunction.

Polarity of the plug

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type.

1. SERVICING NOTES ............................................. 3

2. GENERAL .................................................................. 4

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 5

3-2. MAIN Board (Rch) ......................................................... 6

3-3. Battery (Li-ion) Sub Assy (Lch) ..................................... 6

3-4. CHARGER Board (Lch) ................................................. 7

3-5. Wire Setting .................................................................... 8

4. ELECTRICAL ADJUSTMENT ........................... 9

5. DIAGRAMS

5-1. Block Diagram - AUDIO Section - ................................. 13

5-2. Block Diagram - POWER SUPPLY Section - ................ 14

5-3. Printed Wiring Board - MAIN Board - ........................... 16

5-4. Schematic Diagram - MAIN Board (1/3) - ..................... 17

5-5. Schematic Diagram - MAIN Board (2/3) - ..................... 18

5-6. Schematic Diagram - MAIN Board (3/3) - ..................... 19

5-7. Printed Wiring Board - CHARGER Board

(US, CND, JE models) - ................................................. 20

5-8. Printed Wiring Board - CHARGER Board

(Except US, CND, JE models) - ..................................... 20

5-9. Schematic Diagram - CHARGER Board - ..................... 21

SAFETY-RELATED COMPONET WARNING!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

6. EXPLODED VIEWS

6-1. Housing, Lithium-Ion Battery Section ............................ 28

6-2. MAIN Board, CHARGER Board Section ...................... 29

7. ELECTRICAL PARTS LIST .............................. 30

Accessories are given in the last of the electrical parts list.

• Abbreviation CND : Canadian model JE : Tourist model

SECTION 1

SERVICING NOTES

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C. Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to ﬂ ow)

than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

MDR-NC500D

NOTE OF REPLACING THE IC501, IC551, IC601, IC801 AND IC802 ON THE MAIN BOARD

IC501, IC551, IC601, IC801 and IC802 on the MAIN board cannot exchange with single. When these parts on the MAIN board are damaged, exchange the entire mounted board.

NOTE OF REPLACING THE IC402 ON THE CHARGER BOARD

IC402 on the CHARGER board cannot exchange with single. When this part on the CHARGER board is damaged, exchange the entire mounted board.

MDR-NC500D

SECTION 2

GENERAL

This section is extracted from instruction manual.

Features

(US and Tourist models )

• Digital noise canceling headphones with Sony’s unique DNC Software Engine.

Creation of a high-precision canceling signal delivers outstanding noise canceling performance.

• AI (Artificial Intelligence) Noise

Canceling function.

Automatic selection of the optimal noise canceling mode based on intelligent analysis of environmental ambient noise.

Digital equalizer delivers ideal frequency

•

response and high-quality music reproduction.

• High S/N ratio achieved through digital signal processing.

• Lightweight design creates extremely comfortable wearing fit.

Generous use of lightweight materials such as Magnesium and A7075 aluminum alloy.

• Pressure relieving urethane cushion in

the earpad.

The earpad structure provides comfort without stress even after extended use.

• Built-in monitor function lets you

silence the audio to listen outside.

Features

(Except US and Tourist models )

•

Digital noise canceling headphones with Sony’s unique DNC Software Engine.

Reduces approx. 99% of ambient noise by creating a high-precision canceling signal.

• AI (Artificial Intelligence) Noise

Canceling function.

Automatic selection of the optimal noise canceling mode based on intelligent analysis of environmental ambient noise.

• Digital equalizer delivers ideal

frequency response and high-quality music reproduction.

• High S/N ratio achieved through digital signal processing.

• Lightweight design for extremely comfortable wearing.

Generous use of lightweight materials such as Magnesium and A7075 aluminum alloy.

• Pressure relieving urethane cushion in

the earpad.

The earpad structure provides comfort without stress even after extended use.

• Built-in monitor function lets you

silence the audio to hear externally.

Charge the headphones

The headphones contains a rechargeable LithiumIon battery. Charge the battery before use.

Connect the supplied AC power adaptor to the DC IN 6V jack on the headphones and an AC outlet. The charge indicator lights up in orange and charging starts.

To an AC outlet

AC power

To DC IN

adaptor

6V jack

(supplied)

Charging is completed after about three hours, and the charge indicator goes out. Disconnect the AC power adaptor after the charging has finished.

Charge indicator

Headphones

When the rechargeable battery is low

When the rechargeable battery is low, short beeps sound from the unit for 8 seconds and the POWER indicator blinks slowly. When the battery level is getting lower, a long beep sounds from the unit for 2 seconds and the POWER indicator blinks quickly, and all operations are stopped. Move the POWER switch to “OFF” in this case.

[Tips

When the battery runs out, you can supply the power to the headphones in one of the following ways:

• Connect the headphones to the AC power adaptor by following the steps shown in “Charge the headphones.” You can use the headphones while charging.

• Use the supplied connecting cord with battery case. See “How to use the connecting cord with battery case” for details.

Using your AC power adaptor abroad

You can use yourAC power adaptor in any country or area that uses 100 V to 240 VAC, 50/60 Hz, by connecting a plug adaptor. If the country you visit employs a different shaped socket, use the correct plug adaptor. Consult your nearest travel bureau for the type of plug adaptor needed for your trip.

Listening to music

1 Connect the headphones to the AV

equipment.

When connecting to the stereo mini jack of a WALKMAN*, etc.

When connecting to the stereo mini jack of the remote control supplied with a WALKMAN, etc.

* “WALKMAN” and “WALKMAN” logo are

registered trademarks of Sony Corporation.

Notes

• When connecting the cord, insert the plug into the

jack until the green portion of the plug disappears.

• To disconnect the cord, pull it out by the plug, not

the cord, as the inner conductors may break.

2 Turn on the power on the right side of the

headphones.

The POWER indicator lights up in blue, and a short beep sounds from the unit.

3 Put on the headphones.

After confirming the cord on the left and the POWER switch on the right, put on the headphones. Adjust the ear pads so as to cover your ears.

4 Start playing on the AV equipment

connected to the headphones.

Note

Playback is not available when there is no power.

Headphones

Connecting cord 1.5 m (supplied)

Connecting cord

0.5 m (supplied)

Remote control

POWER indicator

POWER switch

Tactile dot (on the left)

Utilizing the AI Noise Canceling

1 Press the AI NC MODE button.

When you press the AI NC MODE the POWER switch is set to “ON”, sounds come from the headphones to inform you that the unit has started analyzing ambient sound components (approx. 3 seconds). During analysis, sound reproduction from the unit is stopped and the POWER indicator lights in pink. When analysis is completed, the most effective noise canceling mode is set automatically, and sound reproduction from the headphones starts.

AI Noise Canceling

AI Noise Canceling is a useful function that automatically selects one of the noise canceling modes. This function provides the most effective noise canceling mode by immediately analyzing ambient sound components when the AI NC MODE button is pressed.

[Tips

• When the power of the headphones is turned on, mode A is set. (See “Noise canceling mode types,” for details about Mode A.)

• Press the AI NC MODE button again to reset the noise canceling mode if ambient noise has changed, such as when you move outdoors from a room.

To set the noise canceling mode manually

You can set the noise canceling mode manually (manual noise canceling).

1 Press and hold the AI NC MODE button

for more than one second.

Sounds ( ) come from the headphones to inform you that manual noise canceling is set.

2 Press the AI NC MODE button

repeatedly to change the mode type.

The POWER indicator blinks pink and a beep(s) sound(s) from the headphones. After that, the noise canceling mode is set. The number of POWER indicator blinks and the beep sounds depends on the mode selected. See “Noise canceling mode types.”

[Tips

• Mode A is selected when manual noise canceling is activated.

• To change from manual noise canceling to AI Noise Canceling, press and hold the AI NC MODE button for more than one second. When you hear the sounds

) to inform you of the change to AI Noise

( Canceling, press the AI NC MODE button again. Ambient analysis starts and the most effective noise canceling mode is set automatically.

Noise canceling mode types

Mode names Number of POWER indicator

A:Noise mainly in an airplane is effectively reduced. B:Noise mainly in a bus or a train is effectively

reduced.

C:Noise mainly found in an office environment (PC,

copier, air ventilation, etc.) is effectively reduced.

blinks (pink) and beep sounds

button

POWER indicator

AI NC MODE button

Hearing environmental sound for safety

If the MONITOR the POWER switch is set to ON, playback silences then you can hear the surrounding environment.

and

Note

Environmental sound might not be heard if the microphone is covered with your fingers.

button

Monitor microphone

When using in an airplane

• The supplied plug adaptor can be connected to the dual or stereo mini jacks in an airplane.

for dual jacks for stereo mini jacks

• Do not use the headphones when use of electronic equipment is prohibited, or when use of personal headphones for in-flight music services are prohibited.

How to use the connecting cord with the battery case

You can continue to use the unit, even when the rechargeable battery in the headphones runs out, by connecting the supplied connecting cord with battery case. Use the connecting cord with battery case by inserting two size AA alkaline batteries.

1 Open the lid of the battery case.

2 Insert two size AA alkaline batteries.

Make sure of direction, matching the F marks in the case with those on the batteries.

3 Close the lid.

4 Connect the supplied connecting cord

with the battery case to both the headphones and AV equipment.

Headphones

AV equipment

Notes

• When connecting the cord, insert the plug fully into the jack so that the green sign on the metal parts cannot be seen.

• When disconnecting the cord, pull it out by holding the plug. If the cord is pulled forcibly the wire may break.

is pressed and held while

MONITOR button

Connecting cord with battery case (supplied)

5 Set the POWER switch of the

headphones to “OFF,” and then set the POWER switch of the battery case to “ON.”

The POWER indicator on the battery case lights up green.

POWER switch

POWER indicator

See steps 2 to 4 of “Listening to music” for the following setting steps. After use, set the POWER switch of both the headphones and the battery case to “OFF.”

[Tips

• The power supply of the rechargeable battery is consumed first, unless the battery runs out.

• If you connect and turn on the connecting cord with the battery case in advance when the rechargeable battery is low, you can use the headphones uninterrupted, even after the battery in the headphones runs out.

Notes

• The use of manganese batteries is not recommended, since this type of battery has an extremely short usage time.

• The battery case supplies the power to the headphones for operation purposes only. It does not charge the internal rechargeable battery in the headphones.

• The POWER indicator of the battery case becomes dim when the battery life is reaching the limit. Replace the battery with new ones at the time.

• The supplied connecting cord with battery case is only for these headphones. Do not connect to other equipment.

After use

Turn off the power of the headphones.

Flat Storage

he housings rotate to make them flat for easy storage in the carrying case (supplied), or in a seat pocket. Restore to their usual position before using.

3-3-

Putting the headphones in the carrying case

Rotate the housings to be flat before putting them in the carrying case.

SECTION 3

DISASSEMBLY

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SET

– Rch – – Lch –

3-2. MAIN BOARD (Rch) (Page 6)

3-3. BATTERY (LI-ION) SUB ASSY (Lch) (Page 7)

3-4. CHARGER BOARD (Lch) (Page 8)

3-5. WIRE SETTING (Page 8)

MDR-NC500D

Note: Follow the disassembly procedure in the numerical order given.

3-2. MAIN BOARD (Rch)

housing (R) sub assy



two screws



(M2.6)

screen



ear pad (R)



claw

flexible flat cable



(MAIN board: CN405/POWER board)

• POSITION OF LEAD WIRES (MAIN board: Side B)

natural

red

red (SP201)

to CHARGER board

red/dark blue

dark blue

red/green

natural/green

green

white

black

claw



Remove solders.



yellow

blue

natural

natural (MC201)

blue (MC201) natural (MC201) blue (MC231)

natural (SP201)

Remove solders.



cushion saranet



MAIN board

sheet (A)

shield sheet (D)



shield sheet (C)



natural

to MODE board to RESET board

natural greenred

3-3. BATTERY (LI-ION) SUB ASSY (Lch)

screen



ear pad (L)



shield sheet (B)



MDR-NC500D

battery (LI-ION) sub assy lead

CN403

black

two screws



(M2.6)

battery (LI-ION) sub assy



3-4. CHARGER BOARD (Lch)

connector





claw



claw

red

sheet (B)



housing (L) sub assy



CHARGER board

claw



• POSITION OF LEAD WIRES (CHARGER board)

– Side A – – Side B –

red/dark blue

to MAIN board

dark blue

black

green

natural/green

red/green

claw



Remove solders.



CHARGER board



flexible flat cable



(CHARGER board: CN402/JACK board)

blue

natural

yellow

natural

white

red

black (housing plate)

black (JACK board)

natural (MIC101)

blue (MIC131)

natural (MIC131)

to MAIN board

natural (SP101)

blue (MIC101)

red (SP101)

red (JACK board)

MDR-NC500D

3-5. WIRE SETTING

– Lch – – Rch –

relay cord

MIC NC wireMIC NC wire

JACK wire

driver wiredriver wire

relay cord wire

sheet (A)

relay cord

MIC monitor wire

ground wire

JACK board

relay cord wire

flexible flat cable

sheet (B)

MODE board wire

RESET board wire

cushion saranet

MDR-NC500D

SECTION 4

ELECTRICAL ADJUSTMENTS

NOISE CANCELING VOLUME ADJUSTMENT

Procedure:

1. Prepare the following parts. 22 kΩ resistor (Part No.: 1-260-115-11) 330 Ω resistor (Part No.: 1-260-093-11) 270 Ω resistor (Part No.: 1-260-092-11) 39 Ω resistor (Part No.: 1-260-082-11) 100 µF capacitor (Part No.: 1-126-933-11)

2. Remove the shield sheet (C) and sheet (A). (Refer to Fig. 1-1)

3. Remove lead wires of the TP182 (dark blue), TP183 (red/dark blue). (for CHARGER board (SP101)) (Refer to Fig. 1-2)

4. Remove lead wires of the TP282 (natural), TP283 (red). (for SP201) (Refer to Fig. 1-2)

– MAIN Board (Side B) –

CHARGER board

(SP101)

Remove

Red/Dark Blue

Dark Blue

TP183

TP182

RV101

RV282

TP284

R211

RV182

SL201

TP203

RV201

TP282 TP283

remove the sheet (A) remove the shield sheet (C)

SP201

Natural

Red

Fig. 1-1 Fig. 1-2

TP478

TP184

TP103

R111

SL101

MDR-NC500D

1 AMP Gain Adjustment Connection:

1. Connect resistors (22 kΩ, 330 Ω + 270 Ω) and capacitor (100 µF) to the TP184, TP478. (Refer to Fig. 2)

2. Connect a resistor to (39 Ω) the TP182, TP183. (Refer to Fig. 2)

3. Connect a resistor to (39 Ω) the TP282, TP283. (Refer to Fig. 2)

– MAIN Board (Side B) –

39 Ω

level

(measure L-CH)

39 Ω

level

(measure R-CH)

RV282

TP183

TP182

RV101

RV182

RV201

TP282 TP283

TP478

TP284

R211

TP184

R111

TP103

Do not touch in this adjustment.

adjustment parts

(input R-CH)

SL201

TP203

(input L-CH)

SL101

100 µF

22 kΩ

330 Ω

600 Ω

270 Ω

measure $(L-CH) and %(R-CH) level

Fig. 2

Adjustment:

– L-CH –

1. Connect an audio analyzer (output impedance: 600 Ω) to A and B in Fig. 2.

2. Input the signal (1 kHz, 0 dBv) from the audio analyzer.

3. Adjust RV182 so that C level in Fig. 2 (between TP182 and TP478) is –2.6 dBv ± 0.1 dB. (Refer to Fig. 3)

audio analyzer

OUT

output impedance: 600 Ω signal: 1 kHz, 0 dBv

– R-CH –

4. Remove the one side of resistor (22 kΩ) of the TP184, and connect to TP284. (Refer to Fig. 3)

5. Input the signal (1 kHz, 0 dBv) from the audio analyzer.

6. Adjust RV282 so that the D level in Fig. 2 (between TP238 and TP478) is –2.6 dBv ± 0.1 dB. (Refer to Fig. 3)

15°

0°

–15°

RV182, RV282

nearby mechanical center

Fig. 3. Adjusted position (reference)

MDR-NC500D

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.

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.

– MAIN Board (Side B) –

CHARGER board

(SP101)

adjustment parts

SP201

Red/ Dark Blue

Dark Blue

Natural

Red

TP282

TP283

TP183

TP182

RV101

RV201

RV282

TP284

R211

RV182

TP184

TP103

TP478

(measure R-CH)

Do not touch in this adjustment.

(input R-CH)

SL201

TP203

(input L-CH)

R111

SL101

(measure L-CH)

Fig. 4

22 kΩ

100 µF

600 Ω

330 Ω

270 Ω

audio analyzer

OUT

output impedance: 600 Ω signal: 220 Hz, –26 dBv

Fig. 5

hole for R-CH side housing fixation (completely closes it with screw, clay, tape and so on)

MDR-NC500D

Adjustment:

– L-CH –

1. Put the housing (L-CH side) on ﬂ at table.

2. Put a weight (500 g) on the housing. (Refer to Fig. 6)

3. Press the housing so that the ﬂ at table of ear pad is sealed. (It notes do not press very strong)

4. Input the signal (220 Hz, –25 dBv) from the audio analyzer.

5. Adjust RV101 so that the level of connected capacitor to TP103 is –14 dBv ± 0.3 dB. (Refer to Fig. 8)

– R-CH –

6. Remove the one side of resistor (22 kΩ) of the TP184, and connect to TP284.

7. Remove the one side of capacitor (100 µF) of the TP103, and connect to TP203

8. Put the housing (R-CH side) on ﬂ at table.

9. Put a weight (500 g) on the housing. (Refer to Fig. 6) (MAIN board is covered so that there is no short-circuit. RV201 makes it not blocked with the cover) (Refer to Fig. 7)

10. Press the housing so that the ﬂ at table of ear pad is sealed. (It notes do not press very strong)

11. Input the signal (220 Hz, –25 dBv) from the audio analyzer.

12. Adjust RV201 so that the level of connected capacitor to TP203 is –14 dBv ± 0.3 dB. (Refer to Fig. 8)

weight (500g)

hole (RV201)

flat table

housing

ear pad

Fig. 6 Fig. 7

90°

nearby 30°

0°

RV101

90°

RV201

0°

nearby 30°

Fig. 8. Adjusted position (reference)

End of adjustment processing:

lead wires are stored on the MAIN board side

1. Remove the resistors (22 kΩ, 330 Ω + 270 Ω) and capacitor (100 µF) from TP284, TP478.

2. Remove the capacitor (100 µF) from TP203.

3. SL101 and SL201 are short-circuited with solders.

4. The screw (or clay, tape and so on) ﬁ xed to the hole is re- moved.

5. Wire setting, shield sheet (C) and sheet (A) are pasted.

(Flexible ﬂ at cable is cover. MIC is not cover) (Refer to Fig.

cover

MIC is not cover flexible flat cable is cover

Fig. 9

+ 26 hidden pages

Sony MDR-NC500D User Manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

DISASSEMBLY

3-1. DISASSEMBLY FLOW

3-2. MAIN BOARD (Rch)

3-3. BATTERY (LI-ION) SUB ASSY (Lch)

3-4. CHARGER BOARD (Lch)

3-5. WIRE SETTING

ELECTRICAL ADJUSTMENTS