Hitachi UR 18DSL Technical Data And Service Manual

Brand: Hitachi

Model: UR 18DSL

Category: Radio receivers

Type: Technical Data And Service Manual

(1) Possible use of sliding-fit type battery (14.4 or 18 V) and plug-in type battery (9.6, 12, 14.4 or 18 V) (only 18 V

batteries for use in North America)

(2) High sensitivity (due to use of a ferrite bar antenna with total length of 160 mm for AM broadcast reception

and a long rod antenna with maximum length of 920 mm for FM broadcast reception)

(3) High sound volume due to powerful speakers and bass reflex structure

(4) AUX input terminal to enable connection of a mobile music player

(5) Possible charging of mobile phones (requiring a commercially available USB charging adapter)

We aim to expand our market share and increase sales with the new radio having the features above.

[ NEW FEATURES ]

Possible use of Hitachi cordless tool batteries

(sold separately)

(only 18 V batteries for use in North America)

Highly sensitive large ferrite bar antenna 160-mm

long overall for AM radio

Highly sensitive long rod antenna up to 920-mm

long for FM radio

High sound volume due to powerful speakers

and bass reflex structure

AUX input terminal to connect a mobile music player

Possible charging of mobile phones

PRODUCT NAME

Hitachi Cordless Radio

Model UR 18DSL

MARKETING OBJECTIVE

• Listening to the radio in outdoor places, such as at building sites

APPLICATION

SELLING POINTS

LIST No. H843

Oct. 2009

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

Sales Division

REMARK:

x For more information about HANDLING INSTRUCTIONS, visit our website at:

http://www.hitachi-koki.com/manual_view_export/

x Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the place of

company name(s) and model name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows:

Competitor

Symbol Utilized

Company Name Model Name

M MAKITA BMR100

CONTENTS

Page

SELLING POINTS --------------------------------------------------------------------------------------------------------------1

SPECIFICATIONS --------------------------------------------------------------------------------------------------------------5

1. Specifications -----------------------------------------------------------------------------------------------------5

COMPARISON WITH SIMILAR PRODUCTS----------------------------------------------------------------------------6

1. Comparison of Specifications ---------------------------------------------------------------------------------6

PRECAUTIONS ON SALES PROMOTION ------------------------------------------------------------------------------7

1. Safety Instructions -----------------------------------------------------------------------------------------------7

2. Caution Plates ----------------------------------------------------------------------------------------------------7

3. Precautions on the Battery Charger and Rechargeable Battery--------------------------------------8

TROBLESHOOTING GUIDE-------------------------------------------------------------------------------------------------9

REPAIR GUIDE---------------------------------------------------------------------------------------------------------------- 12

Disassembly and Reassembly ------------------------------------------------------------------------------- 12

Checks after Reassembly -------------------------------------------------------------------------------------- 16

STANDARD REPAIR TIME (UNIT) SCHEDULES--------------------------------------------------------------------17

Assembly Diagram for UR 18DSL

-1-

Possible use of Hitachi cordless tool batteries (sold separately)

The UR 18DSL can be used with a sliding-fit type battery (14.4 or 18 V) or a plug-in type battery (9.6, 12,

14.4 or 18 V) (only 18 V batteries for use in North America).

Voltage (V)

Mount type Battery type

9.6 12 14.4 18

Sliding-fit Li-ion



Li-ion



Ni-MH



Plug-in

Ni-Cd



Highly sensitive large ferrite bar antenna 160-mm long overall for

AM radio

The UR 18DSL incorporates a large ferrite bar

antenna with overall length of 160 mm for the

highly sensitive reception of AM radio waves.

About the sensitivity of AM radio reception

(1) The table below lists the AM radio reception sensitivity measured with a special instrument. Lower

values indicate higher sensitivity.

Test frequency

HITACHI

UR 18DSL

612 kHz 55 (dB/m) 53 (dB/m)

999 kHz 53 (dB/m) 51 (dB/m)

AM radio reception

sensitivity

(20 dB S/N)

1404 kHz 51 (dB/m) 50 (dB/m)

(2) The table below lists the results of an overall evaluation of AM radio reception status. For evaluation,

three items (existence of interference, degree of noise, and radio disturbance) were examined by

listening, and the evaluated radios were graded in terms of five levels.

{5: Excellent, 4: Good, 3: Average, 2: Poor, 1: Unusable}

Broadcast station A B C D E

Distance from station

(

)

110 107 106 8 120

Output (kW) 300 100 100 5 100

UR 18DSL

33454

Outdoor

M33453

UR 18DSL

32352

Indoor

M32351

=> The reception sensitivity data of the UR 18DSL is slightly inferior to that of product M. However, the

evaluation results based on listening confirm that actual reception performance of the UR 18DSL is

equivalent to that of product M.

SELLING POINTS

160mm

Ferrite bar antenna

-2-

To receive AM broadcasts better...

The UR 18DSL features a built-in an AM radio antenna.

After tuning in the desired radio broadcast, move the UR

18DSL to determine the position at which to best receive

the broadcast.

About the search function

The search function may be unable to tune in a desired broadcast due to the orientation of the UR 18DSL

or for environmental reasons. Even in such cases, you can tune in the desired broadcast by manually

adjusting the frequency on the UR 18DSL.

About the place of use

The UR 18DSL may not receive radio broadcasts well when placed in a vehicle or building. If placed inside

a building, the UR 18DSL can receive radio broadcasts better when placed near a window.

If the UR 18DSL is placed near equipment (e.g., electric appliance, fluorescent lamp, personal computer)

that produces electromagnetic noise, the sound produced by the UR 18DSL may include noise.

In such cases, move the UR 18DSL sufficiently away from the equipment so as to eliminate the noise.

Highly sensitive long rod antenna up to 920-mm long for FM radio

The UR 18DSL incorporates a long rod antenna (up to

920-mm long) to ensure high sensitivity of FM radio

reception.

About the sensitivity of FM radio reception

(1) The table below lists the FM radio reception sensitivity measured with a special instrument. Lower

values indicate higher sensitivity.

Test frequency Hitachi UR 18DSL M

78 MHz 14 (dBf) 14 (dBf)

83 MHz 11 (dBf) 14 (dBf)

FM radio reception

sensitivity

(30 dB S/N)

88 MHz 11 (dBf) 14 (dBf)

(2) The table below lists the results of an overall evaluation of FM radio reception status. For evaluation,

three items (existence of interference, degree of noise, and radio disturbance) were examined by

listening, and the evaluated radios were graded in terms of five levels.

920 mm

-3-

Broadcast station F G H

No. of receivable

broadcasts

(at grade 3 or better)

Distance from station

(km)

5.5

(short distance)

(middle distance)

108

(middle distance)

Output (kW) 1 5 10 -

UR 18DSL 5 4 2 8 stations

Outdoor

M 5 3 1 4 stations

UR 18DSL 5 3 2 5 stations

Indoor

M 5 2 1 2 stations

{5: Excellent, 4: Good, 3: Average, 2: Poor, 1: Unusable}

=>The reception sensitivity data indicates that the UR 18DSL has higher sensitivity than product M. The

evaluation results based on listening indicate that the UR 18DSL and product M provide equivalent

sensitivity when used outdoors to receive broadcasts from nearby stations, but for outdoor reception of

broadcasts from stations at a middle distance (of about 100 km), the UR 18DSL provides higher

sensitivity than product M.

Similarly for indoor reception, both radios provide equivalent sensitivity for reception from nearby

stations. The UR 18DSL, however, provides higher sensitivity than product M for reception from stations

at a middle distance (of about 100 km).

* Radio reception varies depending on time zone, weather, and other environmental conditions (including

the effects of electric appliances, fluorescent lamps, and personal computers).

About the reception sensitivity of the long rod FM antenna

Suburb

Long distance

Short distance

Urban center

Reinforcing bars and

steel frames block

radio waves.

Broadcast station

Outdoor radio waves

are ver

intense.

Entering radio waves are fully

blocked or weakened by

buildings. walls.

Intensity of radio wave becomes

lower as the wave travels farther.

away from the station

Use of a long antenna enables the

reception of low-intensity radio.

e bette

Use of a long antenna enables the

reception of low-intensity radio.

wave better.

-4-

To receive FM broadcasts better...

After tuning in the desired broadcast, adjust the length,

direction and angle of the rod antenna to obtain better

reception.

While the UR 18DSL is receiving an FM stereo

broadcast, it displays " ".

If the FM stereo broadcast includes too much noise,

press the FM mode alarm button.

The sound mode is switched to monaural mode, and

the display of " " goes off.

To switch back to stereo mode, press the FM mode

alarm mode again.

About the search function

The search function may be unable to tune in a desired broadcast due to the antenna orientation or for

environmental reasons. Even in such cases, you can tune in the desired broadcast by manually adjusting

the frequency on the UR 18DSL.

About the place of use

The UR 18DSL may not receive radio broadcasts well when placed in a vehicle or building. If inside a

building, the UR 18DSL can receive radio broadcasts better when placed near a window.

If the UR 18DSL is placed near equipment (e.g., electric appliance, fluorescent lamp, personal computer)

that produces electromagnetic noise, the sound produced by the UR 18DSL may include noise.

In such cases, move the UR 18DSL sufficiently away from the equipment so as to eliminate the noise.

High sound volume due to powerful speakers and bass reflex

structure

The UR18DSL uses high-output speakers and a bass reflex structure to produce a high volume of sound.

AUX input terminal to connect a mobile music player

The UR 18DSL enables the user to connect a mobile music player and listen to the user's favorite music

played by the player through the UR 18DSL in AUX mode.

Possible charging of mobile phones

The UR 18DSL enables the user to connect a mobile phone to the UR 18DSL and charge the mobile phone

in AUX mode

. (Charging a mobile phone by using the UR 18DSL requires a commercially available USB

charging adapter.)

The UR 18DSL is designed to be set into AUX mode when charging a mobile phone because its

charging-related components produce noise during charging.

FM antenna

-5-

1. Specifications

Model UR 18DSL

Frequency bands

FM: 87.5 to 108 MHz (Europe, Australia, New Zealand, and North America)

AM: 522 to 1620 kHz (Europe, Australia, and New Zealand)

AM: 520 to 1710 kHz (North America)

Antennas

FM: Rod antenna

AM: Ferrite bar antenna (built-in)

Speaker 76 mm (8ȍ) x 2 units

Input terminal Aux in (Ɏ3.5 mm)

Output terminals Headphone terminal (Ɏ3.5 mm) and charging terminal (5 V, 0.5 A)

Maximum practical output

9.6 V: 1.4 W x 2, 12 V: 2.2 W x 21

4.4 V: 3.2 W x 2, 18 V: 5 W x 2

Power supply

Sliding-fit type battery: 14.4 or 18 VDC (only 18 V for use in North America)

Plug-in type battery: 9.6, 12, 14.4 or 18 VDC (only 18 V for use in North

America)

Backup dry-cell battery: 4.5 VDC (three dry-cell batteries)

Domestic AC power outlet (via accessory AC adapter):

Europe: 230 VAC

UK: 230 VAC

Australia: 240 VAC

New Zealand: 230 VAC

North America: 120 VAC

Max. outside dimensions 231 (L) x 184 (W) x 281 (H) mm (with the FM antenna retracted)

Weight 3.3 kg (excluding rechargeable battery, dry-cell batteries, and AC adapter)

Standard accessories AC adapter (12 VDC, 1 A) and three size-AA alkaline dry-cell batteries

SPECIFICATIONS

-6-

1. Comparison of Specifications (Superior specifications: )

Maker HITACHI

Model UR 18DSL

Sliding-fit type

14.4, 18 V

(only 18 V for North America)

9.6, 12, 14.4, 18, 24 V

Battery

voltage

Plug-in type

9.6, 12, 14.4, 18 V

(only 18 V for North America)

9.6, 12, 14.4, 18, 24 V

Tuner Digital Digital

AM antenna Ferrite bar antenna (160 mm) Ferrite bar antenna (140 mm)

FM antenna Rod antenna (max. 920-mm long) Rubber antenna (150 mm)

Stereo output (FM) Provided Provided

Speakers (diameter x quantity) Ɏ76 (8ȍ) x 2 Ɏ76 (8ȍ) x 2

Bass reflex Provided Not Provided

Max. practical output

5 W x 2 (18 V), 3.2 W x 2 (14.4 V),

2.2 W x 2 (12 V), 1.4 W x 2 (9.6 V)

5 W x 2 (24 V), 3 W x 2 (18 V),

2 W x 2 (14.4 V), 1.2 W x 2 (12 V),

0.8 W x 2 (9.6 V)

External input terminal

(Aux in)

Provided (1 terminal)

Provided (2 terminals)

Output terminals

Headphone and charging terminals

(5 V, 0.5 A)

Not Provided

Drip-proof design Partial

Equivalent to splash-proof type in

JIS waterproofing class 4

1.3 Ah About 7 hours About 7 hours

1.4 Ah About 8 hours -

1.5 Ah About 8 hours -

2.0 Ah About 11 hours About 11 hours

2.4 Ah About 13 hours -

2.6 Ah About 14 hours About 13 hours

3.0 Ah About 17 hours About 16 hours

Continuous

operation time

3.3 Ah About 18 hours About 17 hours

Max. outside dimensions

231 (L) x 184 (W) x 281 (H) mm

(with the antenna retracted)

281 (L) x 167 (W) x 304 (H) mm

(excluding the antenna)

Weight

3.3 kg 4.2 kg

Standard accessories

AC adapter and size-AA dry-cell

battery x 3

AC adapter and size-AA dry-cell

battery x 2

Continuous operation time: Calculated with 2.2 watts x 2 outputs

(to adjust to maximum output [at 14.4 V] of product M)

This continuous operation times above should be considered reference data because the actual time

depends on the type and charging status of the battery, and the radio use conditions.

The weight excludes the rechargeable battery, dry-cell batteries, and AC adapter.

COMPARISON WITH SIMILAR PRODUCTS

-7-

CAUTION

xFor safe operation, see Instruction manual.

xRisk of fire, burning or explosion.

For use only with the UC 18YRSL, UC 18YGSL Charger.

Do not crush, disassemble, or dispose of in fire.

CAUTION

xFor safe operation, see Instruction manual.

xRisk of fire, burning or explosion.

For use only with the UC 18YFL, UC 18YRL Charger.

Do not crush, disassemble, or dispose of in fire.

CAUTION

xRead thoroughly HANDLING INSTRUCTIONS before use.

xDo not disassemble nor throw into fire.

WARNING

xTo reduce the risk of injury, the user must read and understand the instruction

manual.

AVERTISSEMENT

xAfin de réduire le risque de blessures, l'utilisateur doit lire

ƔFor safe operation, see instruction manual.

ƔCharge HITACHI rechargeable battery types of the BSL 14 and BSL 18

series. Other types of batteries may burst causing personal injury and damage.

ƔCharge

at a temperature between 32°F and 104°F. Wait at least 15 minutes between the charging

of batteries.

ƔFor indoor use only. ƔReplace a defective cord immediately. ƔDo not install

on or over combustible surfaces.

ƔPOUR UTILISATION A L’INTERIEUR SEULEMENT.

ƔUTILISER POUR CHARGER UNIQUEMENT LES ACCUMULATEURS

HITACHI DU TYPES BSL 14, BSL 18 SERIES. D’ACCUMULATEURS POURRAIENT

ECLATER ET CAUSER DES BLESSURES OU DOMMAGES.

ƔNE PAS INSTALLER SUR OU

PAR

DESSUS DES SURFACES COMBUSTIBLES

CAUTION

AVERTISSEMENT

ATTENTION

1. Safety Instructions

For safe and efficient use of this product, the instruction manual for this product describes general

precautions on the use of cordless radios and precautions specific to this product. For sales promotion,

each salesperson should carefully read all the precautions in order to give appropriate instructions to

customers.

2. Caution Plates

(1) The following cautions are listed on the name plate attached to the main body of each radio.

[For the USA and Canada]

(2) The following cautions are listed on the name plate attached to each storage battery.

[For Europe]

[For the USA and Canada]

(3) The following cautions are listed on the name plate attached to the Model UC 18YRSL Charger.

[For the USA and Canada]

PRECAUTIONS ON SALES PROMOTION

-8-

ƔFor safe operation, see instruction manual.

ƔCharge HITACHI rechargeable battery types of the EB 7, EB 9, EB

12, EB 14, EB 18, BCL 14, BCL 18, and EBM 18 series. Other types of batteries may

burst causing personal injury and damage.

ƔCharge at a temperature between 32°F

and 104°F. Wait at least 15 minutes between the charging of batteries.

ƔFor indoo

use only. ƔReplace a defective cord immediately.

ƔPOUR UTILISATION A L’INTERIEUR SEULEMENT.

ƔUTILISER POUR CHARGER UNIQUEMENT LES

ACCUMULATEURS HITACHI DU TYPES EB 7, EB 9, EB 12, EB 14, EB 18, BCL 14,

BCL 18, EBM 18 SERIES. D’AUTRES TYPES D’ACCUMULATEURS POURRAIENT

ECLATER ET CAUSER DES BLESSURES OU DOMMAGES.

CAUTION

AVERTISSEMENT

ATTENTION

(4) The following cautions are listed on the name plate attached to the Model UC 18YRL Charger.

[For the USA and Canada]

3. Precautions on the Battery Charger and Rechargeable Battery

(1) A rechargeable battery may be unable to be recharged soon after being used.

If a rechargeable battery is connected to the battery charger immediately after having been left exposed

to direct sunlight for an extended period or the UR18DSL has been used with said battery, the charging

time indicator lamp may not go on due to high battery temperature.

To avoid this trouble, customers should be instructed to put the battery in a shaded place with good

airflow and allow for sufficient cooling before recharging.

The cooling time necessary before recharging varies from a few minutes to about 10 minutes, depending on

battery load during use, the duration of use, and ambient temperature.

-9-

Trouble Check method Check result Cause Corrective action

Battery is abnormal or depleted.

Charge the battery or replace it with a normal battery.

Power can be turned on by

both methods (i) and (ii).

AC-Adapter [501] is abnormal.

Replace AC-Adapter [501] with a new one.

(i) Set a normally charged battery in the UR

18DSL, and check whether power can be

turned on.

Power cannot be turned on by

both methods (i) and (ii).

Go to the next check.

Go to check method (1)-(iii).

(ii) Connect AC-Adapter [501] to the UR 18DSL,

and check whether power can be turned on.

Power can be turned on by

either method (i) or (ii).

Terminal Ass'y [65] is abnormal.

Replace Terminal Ass'y [65].

Some connectors are

disconnected.

Same as on the left.

Connect the disconnected connectors.

(iii) Disassemble the UR 18DSL, and then check

whether all connectors are properly

connected.

All connectors are properly

connected.

Go to the next check.

Go to check method (1)-(iv).

Measured voltages are nearly

the same as those on battery

and AC Adapter.

Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].(iv) Set the battery and check voltage at the 3-pin

connectors. * Perform the same check on the

red (+) and blue (-) pins to connect the AC

Adapter.

Voltage cannot be measured.

Go to the next check.

Go to check method (1)-(v).

Fuse (250V-2A) [64] is blown. Same as on the left.

Replace Fuse (250V-2A) [64].

(v) Check whether Fuse (250V-2A) [64] is blown.

Fuse (250V-2A) [64] is not

blown.

Go to the next check.

Go to check method (1)-(vi).

Power can be turned on. Terminal Ass'y [65] is abnormal.

(Replace Terminal Ass'y [65].)

(1) Power

cannot be

turned on.

(vi) Replace Terminal Ass'y [65], and then check

whether power can be turned on.

Power cannot be turned on. Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

Abnormal noise is produced

when turning the dial.

Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

(i) Turn the volume dial.

Neither noise nor sound is

produced.

Go to the next check.

Go to check method (2)-(ii).

Some connectors are

disconnected.

Same as on the left.

Connect the disconnected connectors.

(ii) Disassemble the UR 18DSL, and then check

whether all connectors are properly

connected.

All connectors are properly

connected.

Go to the next check.

Go to check method (2)-(iii), or replace Jack [68].

Measured resistance is about

8ȍ (normal value).

Go to the next check.

Go to check method (2)-(iv).

(iii) Measure speaker resistance with multimeter.

Measured resistance largely

deviates from 8ȍ.

Speakers are abnormal.

Replace Front Housing Ass'y [8].

Some lead wires are broken.

Replace broken lead wires.

(2) No sound

is output.

(iv) Use multimeter to check whether any lead

wires are broken.

No lead wire is broken.

Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

TROBLE SHOOTING GUIDE

-9-

-10-

Trouble Check method Check result Cause Corrective action

Radio waves are blocked by

surrounding walls or other structures.

Orientation of UR 18DSL (built-in

antenna) is inappropriate.

Move the UR 18DSL to a better reception environment (e.g., near a window),

and then adjust orientation of the UR 18DSL.

The broadcast can be

received.

Reception is affected by noise from

nearby equipment.

Keep the UR 18DSL away from the noise-source equipment.

(i) Put the UR 18DSL in a place without

surrounding walls or buildings blocking radio

waves, and without noise-producing

equipment (e.g., fluorescent lamp, personal

computer, battery charger, compressor), tune

in an easily received frequency, and then

adjust orientation of the UR 18DSL.

The broadcast cannot be

received.

Go to the next check. Go to check method (3)-(ii).

Some connectors are

disconnected.

Same as on the left. Connect the disconnected connectors.

(3) AM radio

broadcast

cannot be

received.

(ii) Disassemble the UR 18DSL, and then check

whether all connectors are properly

connected.

All connectors are

properly connected.

Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

Radio waves are blocked by

surrounding walls or other structures.

Orientation of Rod Antenna [1] is

ina

riate.

Move the UR 18DSL to a better reception environment (e.g., near a window),

and then adjust orientation of Rod Antenna [1].

The broadcast can be

received.

Reception is affected by noise from

nearby equipment.

Keep the UR 18DSL away from the noise-source equipment.

(i) Put the UR 18DSL in a place without

surrounding walls or buildings blocking radio

waves, and without noise-producing

equipment (e.g., fluorescent lamp, personal

computer, battery charger, compressor), tune

in an easily received frequency, and then

adjust orientation of Rod Antenna [1].

The broadcast cannot be

received.

Go to the next check. Go to check method (4)-(ii).

Some connectors are

disconnected.

Same as on the left Connect the disconnected connectors.

(4) FM radio

broadcast

cannot be

received.

(ii) Disassemble the UR 18DSL, and then check

whether all connectors are properly

connected.

All connectors are

properly connected.

Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

Music can be played. The connection cable is broken. Ask the customer to check whether the connection cable is broken.(i) Connect the music player using the proper

connection cable, and then check whether

music can be played.

Music cannot be played. Go to the next check. Go to check method (5)-(ii).

Music can be played. The mobile music player is faulty. Ask the customer to check whether the mobile music player is faulty.(ii) Connect a normal mobile music player, and

then check whether music can be played.

Music cannot be played. Go to the next check. Go to check method (5)-(iii).

Some connectors are

disconnected.

Same as on the left. Connect the disconnected connectors.(iii) Disassemble the UR 18DSL, and then check

whether all connectors are properly

connected.

All connectors are

properly connected.

Go to the next check. Go to check method (5)-(iv).

Music can be played. Jack [68] is abnormal. (Replace Jack [68].)

(5) Music cannot

be played in

AUX mode.

(iv) Replace Jack [68], and then check whether

music can be played.

Music cannot be played. Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

-10-

-11-

Trouble Check method Check result Cause Corrective action

Sound is produced. The headphone is faulty. Ask the customer to check whether the headphone is faulty.(i) Connect a normal headphone, and then check

whether sound is output.

Sound is not produced. Go to the next check. Go to check method (6)-(ii).

Some connectors are

disconnected.

Same as on the left. Connect the disconnected connectors.(ii) Disassemble the UR 18DSL, and then check

whether all connectors are properly

connected.

All connectors are

properly connected.

Go to the next check. Go to check method (6)-(iii).

Sound is produced. Jack [68] is abnormal. (Replace Jack [68].)

(6) No sound is

output from

headphone.

(iii) Replace Jack [68], and then check whether

sound is produced.

Sound is not produced. Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

The mobile phone can

be charged.

The charging cable is broken. Ask the customer to check whether the charging cable is broken.(i) Connect the mobile phone with the normal

charging cable, and then check whether the

mobile phone can be charged.

The mobile phone

cannot be charged.

Go to the next check. Go to check method (7)-(ii).

The mobile phone can

be charged.

The mobile phone is faulty. Ask the customer to check whether the mobile phone is faulty.(ii) Connect a normal mobile phone, and then

check whether the mobile phone can be

charged.

The mobile phone

cannot be charged.

Go to the next check. Go to check method (7)-(iii).

Some connectors are

disconnected.

Same as on the left. Connect the disconnected connectors.

(7) Mobile phone

cannot be

charged.

(iii) Disassemble the UR 18DSL, and then check

whether all connectors are properly

connected.

All connectors are

properly connected.

Control PCBA [17] and Function

PCBA [21] are abnormal.

Replace Control PCBA [17] and Function PCBA [21].

The switch or dial is

enabled.

Control PCBA [17] is abnormal. (Replace Control PCBA [17].)(i) Replace Control PCBA [17], and then check

whether the switch or dial is enabled.

The switch or dial is

disabled.

Go to the next check. Go to check method (8)-(ii).

(8) A switch or Dial

[6] is disabled.

(ii) Replace Function PCBA [21], and check

whether the switch or dial is enabled.

The switch or dial is

enabled.

Function PCBA [21] is abnormal. (Replace Function PCBA [21].)

-11-

-12-

The [Bold] numbers in the descriptions below correspond to item numbers in the parts list for the UR

18DSL. The rechargeable battery must be removed from the UR 18DSL before disassembling or repairing

the UR 18DSL.

1. Disassembling and reassembling the front and back housings

<<Disassembly>>

(1) Remove four Machine Screws (M4 x 15) (Black) [3] from the front of the product.

(2) Open the Back Door [49] and remove two Machine Screws (M4 x 15) (Black) [3] from the back of the

Back Housing [63].

NOTE: Perform this operation carefully because multiple lead wires are connected between the

front and back housings.

(3) Remove the four lead wire connectors (Fig. 1) from Function PCBA [21] in the front housing. Then you

can fully separate the front housing from the back housing.

<<Reassembly>>

For reassembly, reverse the disassembling procedure while paying attention to the following:

(1) The two 3-pin connectors have similar shapes. Be careful to mount both at the correct positions.

(On products with serial numbers N39 to N49) (The upper 3-pin connector has read, black, and white

lead wires. The lower 3-pin connector has blue, red, and yellow lead wires.)

* To prevent inverted mounting, the shape of the upper 3-pin connector for products with serial

number N59 and later has been changed. On products with serial number N39 or N49, Jack [68]

must also be replaced when replacing Function PCBA [21]. These parts are treated as a set.

Similarly, when Jack [68] is replaced, Function PCBA [21] must also be replaced.

(2) When connecting each connector, be sure to fit it fully into the receptacle.

(3) The Front O-Ring [61] is set between the mating surfaces of the front and back housings. Be careful to

prevent any part of the O-ring from protruding.

(4) Be careful to prevent lead wires from being caught between other parts.

REPAIR GUIDE

Four connectors to remove

x Inside the front housing

3-pin connecto

(upper)

3-pin connector

(lower)

Fig. 1

Disassembly and Reassembly

-13-

2. Disassembling and reassembling the back housing

<<Disassembly>>

(1) Remove five Machine Screws (W/Flange) (M3 x 10) (Black) [9]. Then you can remove the Speaker Back

Cover [60]. (Fig. 2)

(2) Remove the Speaker Back Cover [60]. Then you can see the Terminal Ass'y [65], AA Battery Box [66],

and Jack [68]. (Fig. 3)

(3) Remove five Machine Screws (W/Flange) (M3 x 10) (Black) [9] (indicated by arrows in Fig. 3) and

three Machine Screws (W/Flange) (M3 x 10) (Black) [9] from the Jack Cover (L) [59] located externally

on the left side. Then you can remove the Terminal Ass'y [65].

(4) Remove three Machine Screws (W/Flange) (M3 x 10) (Black) [9] from the Jack Cover (R) [69] located

externally on the right side. Then you can remove the Jack [68].

(5) The Fuse (250V-2A) [64] is located to the right of the EB battery box in the Terminal Ass'y [65], and can

be easily replaced.

Remove five Machine Screws

(W/Flange) (M3 x 10) (Black) [9]

fixing the Speaker Back Cover [60].

Inside the back housing

Fig. 2

Fig. 3

Eight Machine Screws (W/Flange)

(M3 x 10) (Black) [9] fixing the

Terminal Ass'y [65]

Three Machine

Screws (W/Flange)

(M3 x 10) (Black) [9]

Bottom of inside the back

housing

Fuse (250V-2A)

[64]

EB battery box

Fig. 4

-14-

<<Reassembly>>

For reassembly, reverse the disassembling procedure while paying attention to the following:

(1) When reassembling the Terminal Ass'y [65], be sure to mount the jack located internally on the left side

prior to the EB battery box. (The two parts cannot be assembled when mounted in reverse order.)

(2) Be careful not to mount the Jack [68] upside down. (It "can" be mounted upside down in the assembly

with the AA Battery Box [66] removed.)

(3) Be careful to prevent lead wires from being caught between other parts.

3. Disassembling and reassembling the front housing

Removing the function PCBA

<<Disassembly>>

(1) Remove three connectors, and then remove four Machine Screws (W/Flange) (M2.6 x 10) (Black) [19].

(2) Remove lead wires from the speakers by using a soldering iron.

(3) Move Function PCBA [21] aside a little, and then remove the Machine Screw (W/Flange) (M3 x 10)

(Black) [9] located near the end of the Rod Antenna [1]. Then you can remove the lead wire

connected to the Rod Antenna [1]. (Fig. 5)

(4) Remove Function PCBA [21].

<<Reassembly>>

For reassembly, reverse the disassembling procedure while paying attention to the following:

(1) When soldering lead wires on the speakers, carefully check the colors of lead wires for proper

connections.

Right speakers (found on the left in disassembled status): Lead wire colors are red (+) and blue (-).

Left speakers (found on the right in disassembled status): Lead wire colors are white (+) and blue (-).

(2) Do not forget to connect the lead wire to the Rod Antenna [1].

(3) When connecting each connector, be sure to fit it fully into the receptacle.

Removing the Control PCBA

<<Disassembly>>

(1) Remove the two Dials [6] from the front of the Front Housing Ass’y [8].

NOTE: Wrap a piece of thick cloth around each Dial [6], and then remove it with pliers or another

tool. Be careful not to damage the Dial [6].

(2) Remove five Machine Screws (W/Flange) (M2.6 x 10) (Black) [19]. Then you can remove Control PCBA

[17]. (Fig. 6)

Fig. 5

Connectors

Soldered positions

Machine Screw (W/Flange) (M3 x 10)

(Black) [9] is located under Function

PCBA [21].

-15-

<<Reassembly>>

For reassembly, reverse the disassembling procedure while paying attention to the following:

(1) Do not forget to attach the Fibre Washers [18].

(2) Be careful to prevent dust or fingerprints from adhering to the LCD monitor on Control PCBA [17] and

the transparent window of the Front Housing Ass’y [8].

Replacing only the telescopic part of the Rod Antenna

(1) Remove the screw from the joint, and then divide a new Rod Antenna [1] unit into the telescopic

part and the main shaft.

(2) Similarly, disassemble the Rod Antenna [1] mounted on the UR18DSL by dividing it at the joint.

To disassemble the Rod Antenna [1] mounted on the UR 18DSL, turn the Rod Antenna [1] by 90

degrees as shown in the figure below, and then use a screwdriver to remove the screw fixing the joint from

the right side of the UR 18DSL (of which the shaft is at least 140-mm long). (Fig. 8)

(3) Replace the telescopic part of the Rod Antenna [1] with the new one, and then tighten the screw

fixing the joint.

NOTE: Be careful not to lose the two thin washers mounted at the joint of the Rod Antenna [1].

Five Machine Screws (W/Flange)

(M2.6 x 10) (Black) [19]

Control PCBA [17] at the

top of the front housing

Fig. 6

Rod Antenna [1]

Joint Telescopic part

Main shaft

Fig. 7

Fig. 8

-16-

 Connect the AC adapter, sliding-fit type battery, or plug-in type battery to the UR 18DSL, and then check

that the UR 18DSL can be turned on normally.

 Check that the UR 18DSL can receive AM radio broadcasts normally

in a good reception environment

 Check that the UR 18DSL can search for AM radio broadcasts normally

in a good reception environment

 Check that the UR 18DSL can receive FM radio broadcasts normally

in a good reception environment

 Check that the UR 18DSL can search for FM radio broadcasts normally

in a good reception environment

Good reception environment: A place without walls and buildings that block radio waves and without

nearby equipment (e.g., fluorescent lamp, personal computer, battery charger, compressor) that

produces noise

Reception of a radio wave depends on the direction of the broadcast station and orientation of the

antenna. If a broadcast cannot be received well, try to adjust the orientation of the FM antenna (or

orientation of the UR 18DSL for AM radio reception).

Searching for a broadcast depends on the direction of the broadcast station and orientation of the

antenna. If a broadcast cannot be properly searched, try to adjust the orientation of the FM antenna (or

orientation of the UR 18DSL for AM radio reception).

While receiving an AM radio broadcast, tap the side of the UR18DSL with your hand, and then check that

noise does not increase or sound is not interrupted each time you tap the radio.

(If noise increases or the sound is interrupted, connectors may be loose or a circuit board may be faulty.)

While receiving an FM radio broadcast, tap the side of the UR 18DSL with your hand, and then check that

noise does not increase or sound is not interrupted each time you tap the radio.

(If noise increases or the sound is interrupted, connectors may be loose or a circuit board may be faulty.)

Checks after Reassembly

-17-

MODEL

Variable

Fixed

10 20 30 40 50 60 min.

Work Flow

UR 18DSL

General Assembly

Function PCBA

Control PCBA

Dial

Speaker Back

Cover

Terminal Ass’y

Aa Battery Box

Jack

Rod Antenna

Handle Set

Front Housing

Ass’y

Tpe Cover (A)

Tpe Cover (B)

Speaker Cover

Back Housing

Tpe Cover (D)

Tpe Cover (C)

Back Door

STANDARD REPAIR TIME (UNIT) SCHEDULES

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Hitachi UR 18DSL Technical Data And Service Manual

Brand: Hitachi

Model: UR 18DSL

Category: Radio receivers

Type: Technical Data And Service Manual

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Hitachi UR 18DSL Technical Data And Service Manual

Hitachi UR 18DSL Technical Data And Service Manual

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