Micon T20 User manual

Brand: Micon

Model: T20

Category: Network switches

Type: User manual

SERVICE MANUAL

42" DIGITAL PLASMA

COLOR TELEVISION

DOCUMENT CREATED IN JAPAN, March, 2006 GREEN

42HP66

(MFR’S VERSION A)

FILE NO. 050-200611GR

The above model is classified as a green product (*1), as indicated by the underlined serial number.

This Service Manual describes replacement parts for the green product. When repairing this green

product, use the part(s) described in this manual and lead-free solder (*2).

For (*1) and (*2), see the next page.

(*1) GREEN PRODUCT PROCUREMENT

The EC is actively promoting the WEEE & RoHS Directives that define standards for recycling

and reuse of Waste Electrical and Electronic Equipment and for the Restriction of the use of

certain Hazardous Substances. From July 1, 2006, the RoHS Directive will prohibit any

marketing of new products containing the restricted substances.

Increasing attention is given to issues related to the global environmental. Toshiba Corporation

recognizes environmental protection as a key management tasks, and is doing its utmost to

enhance and improve the quality and scope of its environmental activities. In line with this,

Toshiba proactively promotes Green Procurement, and seeks to purchase and use products,

parts and materials that have low environmental impacts.

Green procurement of parts is not only confined to manufacture. The same green parts used in

manufacture must also be used as replacement parts.

(*2) LEAD-FREE SOLDER

This product is manufactured using lead-free solder as a part of a movement within the consumer

products industry at large to be environmentally responsible. Lead-free solder must be used in

the servicing and repair of this product.

WARNING

This product is manufactured using lead free solder.

DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT !

The melting temperature of lead-free solder is higher than that of leaded solder by 86°F to 104°F

(30°C to 40°C). Use of a soldering iron designed for lead-based solders to repair product made

with lead-free solder may result in damage to the component and or PCB being soldered. Great

care should be made to ensure high-quality soldering when servicing this product  especially

when soldering large components, through-hole pins, and on PCBs  as the level of heat

required to melt lead-free solder is high.

A1-1

A1-2

SERVICING NOTICES ON CHECKING

1. KEEP THE NOTICES

As for the places which need special attentions,

they are indicated with the labels or seals on the

cabinet, chassis and parts. Make sure to keep the

indications and notices in the operation manual.

3. USE THE DESIGNATED PARTS

2. AVOID AN ELECTRIC SHOCK

There is a high voltage part inside. Avoid an

electric shock while the electric current is

flowing.

The parts in this equipment have the specific

characters of incombustibility and withstand

voltage for safety. Therefore, the part which is

replaced should be used the part which has

the same character.

Especially as to the important parts for safety

which is indicated in the circuit diagram or the

table of parts as a mark, the designated

parts must be used.

5. PUT PARTS AND WIRES IN THE

ORIGINAL POSITION AFTER

ASSEMBLING OR WIRING

There are parts which use the insulation

material such as a tube or tape for safety, or

which are assembled in the condition that

these do not contact with the printed board.

The inside wiring is designed not to get closer

to the pyrogenic parts and high voltage parts.

Therefore, put these parts in the original

positions.

PERFORM A SAFETY CHECK AFTER

SERVICING

Confirm that the screws, parts and wiring which

were removed in order to service are put in the

original positions, or whether there are the

portions which are deteriorated around the

serviced places serviced or not. Check the

insulation between the antenna terminal or

external metal and the AC cord plug blades.

And be sure the safety of that.

(INSULATION CHECK PROCEDURE)

10.

Unplug the plug from the AC outlet.

Remove the antenna terminal on TV and turn

on the TV.

Insulation resistance between the cord plug

terminals and the eternal exposure metal

[Note 2] should be more than 2.5M ohm by

using the 500V insulation resistance meter

[Note 1].

If the insulation resistance is less than 2.5M

ohm, the inspection repair should be

required.

[Note 1]

If you have not the 500V insulation

resistance meter, use a Tester.

[Note 2]

External exposure metal: Antenna terminal

Screw

21pin jack

Side RCA jack

Rrar RCA jack

Headphone jack

4. BE CAREFUL WITH THE PDP PANEL

When you handle the PDP Filter you must

wear the gloves twice, because, you are to

avoid soil it by your sweat and dust.

When you lift the PDP Filter you should hold it

with the palm of your hand.

Don’t pick up it with your fingers.

The back side of PDP Filter tends to damaged.

Since there is no coating.

Therefore, it put into the packing box at the

time of delivery, without piling up even at the

time of unused.

Also, when you take out it from a packing box,

be careful of the rubbing.

When the surface becomes dirty, wipe it with a

soft cloth as you draw a circle.

When it is dirty hardly, wipe it with a cloth

ethanol infiltrated.

Don’t use ethanol for the back side.

Do not apply it to direct sunshine so that the

characteristic may change.

When you inspect the surface (the scratch, the

dirt and the air bubble), use the fluorescent

light.

When you use SCREW DRIVER and SCREW,

be careful of a metallic powder being mixed.

Do not damage the PDP Module with a

DRIVER.

Do Handling with the PDP Module by 2

persons.

There is a step difference between the cover

and PDP Module.

So, when you remove the screws, place a

cushion on it so that the PDP Module is not

being scratched.

Then remove the screws carefully.

11.

12.

13.

14.

When you remove the cover, do not scratch the

FPC on both ends of PDP Module.

Hold the four ends holder and be careful not to

touch the glass area.

Take care for the damage of vacuum exhaust

pipe due to a collision.

Moisture condensation may damage the PDP

Module.

So, leave it for 48 hours at the service room.

A1-3

HOW TO ORDER PARTS

When you exchange IC and Transistor with a heat sink, apply silicon grease (YG6260M) on the contact

section of the heat sink. Before applying new silicon grease, remove all the old silicon grease.

(Old grease may cause damage to the IC and Transistor).

IMPORTANT

PANEL LOCK

Turn Unit ON.

Press and hold the ‘VOLUME DOWN’ key on the front panel for more than 10 seconds.

The Panel Lock has now been cleared.

To unlock the Password of Panel Lock, please follow the steps below.

Please include the following informations when you order parts. (Particularly the VERSION LETTER.)

1. MODEL NUMBER and VERSION LETTER

The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be

found at the end of the SERIAL NUMBER.

2. PART NO. and DESCRIPTION

You can find it in your SERVICE MANUAL.

TABLE OF CONTENTS

GREEN PRODUCT PROCUREMENT ........................................................................................

LEAD-FREE SOLDER ................................................................................................................

SERVICING NOTICES ON CHECKING.....................................................................................

HOW TO ORDER PARTS ..........................................................................................................

IMPORTANT ...............................................................................................................................

PANEL LOCK..............................................................................................................................

TABLE OF CONTENTS..............................................................................................................

GENERAL SPECIFICATIONS ...................................................................................................

DISASSEMBLY INSTRUCTIONS

1.EXCHANGE METHOD OF PDP MODULE...........................................................................

2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ..................................................

SERVICE MODE LIST ................................................................................................................

WHEN REPLACING EEPROM (MEMORY) IC ..........................................................................

RE-WRITE FOR DIGITAL SOFT FIRMWARE...........................................................................

FUNCTION OF PCB ....................................................................................................................

ELECTRICAL ADJUSTMENTS..................................................................................................

TROUBLESHOOTING GUIDE ...................................................................................................

BLOCK DIAGRAM

SCALER/LVDS/MICON/ADC/JACK/AV SWITCH1/REGULATOR.........................................

AV SWITCH2/STEREO/SOUND AMP....................................................................................

TUNER/DIGITAL/POWER.......................................................................................................

INTERFACE.............................................................................................................................

MICON2 ...................................................................................................................................

PRINTED CIRCUIT BOARDS

AV/REMOCON ........................................................................................................................

SCALER...................................................................................................................................

DIGITAL ...................................................................................................................................

OPERATION/SIDE JACK/FILTER ..........................................................................................

SCHEMATIC DIAGRAMS

AV SWITCH2 ...........................................................................................................................

TUNER/OUT JACK..................................................................................................................

AV JACK ..................................................................................................................................

STEREO ..................................................................................................................................

SOUND AMP/HEADPHONE AMP ..........................................................................................

POWER ...................................................................................................................................

AV JACK2 ................................................................................................................................

IR PASS ...................................................................................................................................

TUNER.....................................................................................................................................

MICON .....................................................................................................................................

SCALER...................................................................................................................................

ADC1........................................................................................................................................

ADC2........................................................................................................................................

LVDS........................................................................................................................................

JACK ........................................................................................................................................

AV SWITCH1 ...........................................................................................................................

REGULATOR...........................................................................................................................

INTERFACE_HDMI IC ............................................................................................................

HDMI MICON2.........................................................................................................................

ASIC.........................................................................................................................................

SDRAM ....................................................................................................................................

FLASH .....................................................................................................................................

FRONT END ............................................................................................................................

AV OUT....................................................................................................................................

POWER2 .................................................................................................................................

OPERATION/SIDE JACK/FILTER ..........................................................................................

INTERCONNECTION DIAGRAM ...............................................................................................

WAVEFORMS .............................................................................................................................

MECHANICAL EXPLODED VIEWS...........................................................................................

MECHANICAL REPLACEMENT PARTS LIST .........................................................................

ELECTRICAL REPLACEMENT PARTS LIST...........................................................................

A1-1

A1-2

A1-3

A2-1

A3-1~A3-5

B1-1~B1-8

B2-1, B2-2

C-1

C-2

C-3

C-4

D-1~D-5

E-1~E-7

F-1, F-2

F-3, F-4

F-5, F-6

F-7, F-8

F-9, F-10

G-1~G-4

G-5~G-8

G-9, G-10

G-11, G-12

H-1, H-2

H-3, H-4

H-5, H-6

H-7, H-8

H-9, H-10

H-11, H-12

H-13, H-14

H-15, H-16

H-17, H-18

H-19, H-20

H-21, H-22

H-23, H-24

H-25, H-26

H-27, H-28

H-29, H-30

H-31, H-32

H-33, H-34

H-35, H-36

H-37, H-38

H-39, H-40

H-41, H-42

H-43, H-44

H-45, H-46

H-47, H-48

H-49, H-50

H-51, H-52

H-53, H-54

I-1~I-3

J-1~J-3

K1-1~K1-3

K2-1~K2-8

A2-1

GENERAL SPECIFICATIONS

G-1 TV PDP PDP Size / Visual Size 42.32 inch / 1074.9 mmV

System Number of Pixels(H x V) 1024(H) x 768(V)

Color System NTSC

Speaker 4 Speaker

Position Front

Main Size 2.2 x 5.0 inch

Impedance 4 ohm

Tweeter Size 2.0 inch

Impedance 8 ohm

Sound Output MAX 10W + 10W

10%(Typical) ---

G-2 Tuning Broadcasting System Analog

US System

System Digital ATSC(8VSB)/QAM

Tuner and System 1Tuner

Receive CH Destination USA(W/ CABLE)

CH Coverage 2 - 69, 4A, A-5 - A-1,

A - I, J - W, W+1 - W+84

Intermediate Digital 44.00MHz

Frequency Analog Picture(FP) 45.75MHz

Sound(FS) 41.25MHz

FP-FS 4.50MHz

Preset CH

Stereo/Dual TV Sound US-Stereo

Tuner Sound Muting Yes

G-3 Signal Video Signal Input Level 1 V p-p/75 ohm

Output Level 1 V p-p/75 ohm

S/N Ratio (Weighted) --

Horizontal Resolution at DVD Mode --

RGB Signal Output Level --

Audio Signal Input Level -8.0dBm/50k ohm

Output Level at DVD --

at TV -8 dBm/1k ohm (0dBm=0.775Vrms)

0-600mV /1k ohm (Variable out mode)

Digital Output Level 0.5 V p-p/75 ohm

S/N Ratio at DVD (Weighted) --

Harmonic Distortion 0.02% (1KHz)

Frequency Response : at DVD --

at Video CD --

at SVCD --

at CD --

G-4 Power Power Source AC 120V AC 60Hz

DC ---

Power Consumption at AC 360 W at AC 120 V 60 Hz

at DC --

Stand by (at AC) 1 W at AC 120 V 60 Hz

Per Year -- kWh/Year

Energy Star Yes

Protector Power Fuse Yes

Safety Circuit Yes

IC Protector(Micro Fuse) No

G-5 Regulation Safety UL/CSA

Radiation FCC/IC

X-Radiation ---

G-6 Temperature Operation +/-0oC ~ +40oC

Storage -20oC ~ +60oC

G-7 Operating Humidity Less than 80% RH

G-8 Clock and Clock

Yes

Timer Sleep Timer Max Time 120 Min

Step 10 Min

On Timer Program Yes

Off Timer Program No

Game Timer Yes

Wake Up Timer No

Timer Back-up (at Power Off Mode) more than -- Min Sec

A3-1

GENERAL SPECIFICATIONS

G-9 Remote Unit RC-KK

Control Glow in Dark Remocon Yes

Remocon Format TOSHIBA

Format TOSHIBA

Custom Code

40-BF h

Power Source Voltage(D.C) 3V

UM size x pcs UM-4 x 2 pcs

Total Keys 44

Keys

Power

Yes

Input

Yes

Display

Yes

Mute

Yes

100 / +10

Yes

CH Return / Ent

Yes

CH +

Yes

CH -

Yes

VOL +

Yes

VOL -

Yes

SLEEP

Yes

Picture Size

Yes

LEFT / FAV -

Yes

MENU/ENTER/DVD MENU

Yes

RIGHT / FAV +

Yes

DOWN

Yes

EXIT

Yes

Multi Brand Keys

Yes

CBL/SAT

Yes

VCR

Yes

DVD

Yes

ENTER

Yes

PAUSE

Yes

PLAY

Yes

STOP

Yes

REW

Yes

SKIP/SEARCH|<<

Yes

SKIP/SEARCH>>|

Yes

TOP MENU

Yes

REC

Yes

CLEAR

Yes

TV/VCR

Yes

A3-2

GENERAL SPECIFICATIONS

G-10 Features Auto Shut Off Yes

Power On Memory Yes

Auto Search No

DNR Yes

Comb Filter Yes

Just Clock Function No

Game Position No

Auto Setup(Language/CH Program) Yes

Picture Setting(TV) Yes

Mode(Picture Preference) Yes

Brightness , Contrast , Color Yes

Tint Yes

Sharpness Yes

Color Temperature Yes

Cable Clear Yes

Picture Setting(PC) Yes

BRIGHTNESS , CONTRAST Yes

HOR POSITION , VER POSITION Yes

PHASE , CLOCK Yes

AUTO ADJUST No

RED , GREEN , BLUE Yes

Audio MTS Yes

Tone Control (Bass/Treble/Balance) Yes

Stable Sound Yes

Surround No

BBE No

SRS WOW (SRS 3D/Focus/Tru Bass) Yes

Valiable Audio Out Yes

Tuning CH Program Yes

TV/Cable Yes

ADD/ERASE Yes

Screen Saver Inversion(Reverse) Yes

Full White(White) Yes

Screen Saver(Picture Shift) Yes

Side Panel Color Yes

Label CH Label Yes

Video Label Yes

Favorite CH Yes

V-Chip

Yes

RRT Setup

Lock Hotel Lock No

Channel Lock Yes

Video Lock Yes

Panel Lock Yes

OSD Language

English

French

Closed Caption

Yes

CC Advanced

Yes

Picture Size Yes

Picture Scroll Yes

Aspect Yes

Backlight No

PFC(Power Factor circuit) Yes

Freeze frame No

PIP/POP No

Digital Out Dolby Digital Yes

MPEG No

PCM Yes

DTS No

PC Monitor Input Yes

VGA (640x480) Yes (60Hz)

VGA (720x400) No

WVGA (848x480) Yes (60Hz)

SVGA (800x600) Yes (60Hz)

XGA (1024x768) Yes (60Hz)

WXGA (1280x768) Yes (60Hz)

WXGA (1280x720) Yes (60Hz)

WXGA (1360x768) Yes (60Hz)

SXGA (1280x1024) No

A3-3

GENERAL SPECIFICATIONS

720x480i (4:3) Yes (60Hz)

720x480i (16:9) Yes (60Hz)

720x480p (4:3) Yes (60Hz)

720x480p (16:9) Yes (60Hz)

720x576i (4:3) No

720x576i (16:9) No

720x576p (4:3) No

720x576p (16:9) No

1280x720p Yes (60Hz)

1920x1080i Yes (60Hz)

Component Input Yes

720x480i (4:3) Yes (60Hz)

720x480i (16:9) Yes (60Hz)

720x480p (4:3) Yes (60Hz)

720x480p (16:9) Yes (60Hz)

720x576i (4:3) No

720x576i (16:9) No

720x576p (4:3) No

720x576p (16:9) No

1280x720p Yes (60Hz)

1920x1080i Yes (60Hz)

G-11 Accessories Owner's Manual Language English / French / Spanish

w/Guarantee Card Yes

Remote Control Unit Yes

Rod Antenna

Poles -

Terminal -

Loop Antenna (W/ Antenna Change Plug)

Terminal -

U/V Mixer

DC Car Cord (Center+)

Guarantee Card

Warning Sheet

Circuit Diagram

Antenna Change Plug

Service Facility List

Important Safeguard

Dew/AHC Caution Sheet

Quick Set-up Sheet

Battery Yes

UM size x pcs UM-4 x 2 pcs

OEM Brand No

AC Adapter

AC Cord (for AC Adapter)

AC Cord Yes

AV Cord (2Pin-1Pin)

HDMI-DVI Cable

Registration Card Yes

300 ohm to 75 ohm Antenna Adapter

Information Sheet Yes

Information Sheet(for IMPORTANT NOTICE) Yes

Information Sheet(for PICTURE SHIFT) Yes

A3-4

GENERAL SPECIFICATIONS

G-12 Interface Switch Power (Tact) Yes

System Select No

Main Power SW No

Channel Up/Menu Up Yes

Channel Down/Menu Down Yes

Volume Up/Menu > Yes

Volume Down/Menu < Yes

Input Select Yes

Menu No

Main Power SW No

Indicator Power / Stand-by Yes(GREEN / RED)

On Timer No

Terminals Rear Video Input 1 RCA x 1

Audio Input

RCA x 2(L/MONO, R)

S- Input

Yes

Video Input 2 RCA x 1

Audio Input

RCA x 2(L/MONO, R)

S- Input

Yes

Video Output RCA x 1

Audio Output RCA x 2(Variable L, R)

Component In 1

RCA x 3

Audio Input (Component In use)

RCA x 2(L/MONO, R)

Component In 2

RCA x 3

Audio Input (Component In use)

RCA x 2(L/MONO, R)

Other Terminal No

Euro Scart (21Pin) No

PC Monitor Input (D-Sub)

Yes

Audio Input

RCA x 2(L/MONO, R)

HDMI Input 1

Yes

Audio Input(DVI 1) PC Monitor Audio Input Alternative

HDMI Input 2

Yes

Audio Input(DVI 2)

Mini Pin Jack(3.5), STEREO

Sub Woofer Out No

Diversity No

Digital Audio Out (Coaxial)

Yes

Digital Audio Out (Optical)

Yes

IR Pass Through

Yes

Ext Speaker No

DC Jack 12V(Center +) No

VHF/UHF Antenna Input(Digital/Analog)

F Type

AC Inlet

Yes

Side Video Input 3 RCA x 1

Audio Input RCA x2(L/MONO,R)

S- Input

Yes

Other Terminal No

G-13 Set Size Approx. W x D x H (mm) 1,070 x 350 x 779.5

G-14 Weight Net Approx. 38.4kg (84.7 lbs)

Gross Approx. 45.4kg (100.1 lbs)

G-15 Carton Master Carton

Content --- Sets

Material --- / ---

Dimensions W x D x H(mm) ---

Description of Origin ---

Gift Box Material Double/Brown

Dimensions W x D x H(mm) 1,180 x 440 x 895

Design As per Buyer's

Description of Origin Yes

Drop Test

Natural Dropping At 1 Corner / 2 Edges /

4 Surfaces

Height (cm) 50(ORION SPEC:31)

Container Stuffing 100

Sets/40' container

G-16 Material Cabinet Cabinet Front ABS 94V0 Non-DECABROM

Cabinet Rear Steel

PCB Non-Halogen

Eyelet Yes

G-17 Environment Environmental standard requirement Green procurement of TOSHIBA

Pb-free Phase3(Pha

A3-5

B1-1

DISASSEMBLY INSTRUCTIONS

1. EXCHANGE METHOD OF PDP MODULE

NOTE

Do handling with the PDP Module by 2 persons.

REMOVAL METHOD OF PDP MODULE

Remove the screw.

Remove the Cabinet Back and Cover Back.

1-1: CABINET BACK/COVER BACK

1-2: STAND ASS'Y

Spread a sheet on the plane table and place the PDP Module carefully with the panel face down.

Remove the screw.

Remove the Stand Ass'y.

Stand Ass'y

Cover Back

Cabinet Back

B1-2

DISASSEMBLY INSTRUCTIONS

Disconnect the connector.

Remove the screw.

Remove the Chassis Ass'y.

1-3: CHASSIS BLOCK

Remove the screw.

Remove the Side Jack.

Hold the Frame Main carefully and remove the PDP Module.

1-4: PDP MODULE

NOTE

When removing the PDP Module, raise the cushion carefully so that you do not scratch the face.

Chassis Ass'y

PDP Module

Frame Main

Side Jack

Raise the cushion.

B1-3

DISASSEMBLY INSTRUCTIONS

Remove the screw.

Remove the Shield Main.

Remove the PDP Filter.

1-5: PDP FILTER

Shield Main Top

Shield Main L

Shield Main R

Shield Main Bottom

PDP Filter

B1-4

DISASSEMBLY INSTRUCTIONS

INSTALLATION METHOD OF PDP MODULE

When you handle the PDP Filter, you must wear gloves to avoid soiling it with sweat and dust.

When you lift the PDP Filter, use the palm of your hand. Don’t pick it up with your fingers.

The back side of the PDP Filter tends to get damaged, since there is no coating. Therefore, it needs to be put into the

packing box at the time of delivery, even if it is not being used at the time. Also, when you take it out of the packing box, be

careful not to rub the appearance.

When the surface becomes dirty, use a cloth which is soft and dust free and wipe it in a circular motion.

When very dirty, lightly use alcohol on the cloth to wipe. Do not use alcohol for the back side.

Do not apply it to direct sunlight, the characteristics may change.

When you inspect for scratches and dirt, use a light to check for air bubbles on the PDP Filter surface.

NOTES FOR NEW PDP FILTER HANDLING

1-6: PDP FILTER (PREPARATION)

Fix the cushion. (Order the cushion new.)1.

Rear side (No coating)

Cushion

3mm

Apply the cushion on

the light brown paint

with 3mm on both

sides of the cushion.

[4 ends common]

B1-5

DISASSEMBLY INSTRUCTIONS

Handle the PDP Module with 2 people.

There is a step difference between the cover and the PDP Module, so when you remove the screws, place a cushion on it

to keep the PDP Module from being scratched. Then remove the screws carefully.

When you remove the cover, do not scratch the FPC on both ends of PDP Module.

Hold all four ends of the holder and be careful not to touch the glass area.

Be careful not to damage the vacuum exhaust pipe.

Moisture condensation may damage the PDP Module, so leave it in the service room for 48 hours.

Reuse the cover, vinyl sheet and screws when returning the PDP Module.

NOTES FOR NEW PDP MODULE HANDLING

Vacuum Exhaust Pipe

FPC

B1-6

DISASSEMBLY INSTRUCTIONS

Remove the fixing screw of Power PCB. Then fix the Wiring Clip. (Use the clips on defective PDP Module)

Fix the Cord Clip. (Use the clips on defective PDP Module)

Fix the Wiring Clip. (Use the clips on defective PDP Module)

1-7: PDP MODULE (PREPARATION)

Wiring Clip

Cord Clip

45˚

Cord Clip

Set SW501 (24V)

B1-7

DISASSEMBLY INSTRUCTIONS

Assemble the Frame Main. (Use the clips on defective PDP Module)

Install the PDP Filter on the set.

Install the Shield Main on the set.

Hold the Frame Main carefully and install the New PDP Module on the set.

Install the Side Jack on the set.

1-8: PDP MODULE

[4 ends common]

Pile up the cushion.

Cushion

Do not smash the cusion. (For all 2 positions)

[NG]

B1-8

DISASSEMBLY INSTRUCTIONS

Do the wire fixing as shown in the photo, then install the Chassis Ass'y.

Install the Stand Ass'y.

1-9: CHASSIS BLOCK

Check if the wire handlings are correct.

Check if the cushion positions are correct.

Check if the tape positions are correct.

Install the Cabinet Back and Cover Back.

1-10: CABINET BACK/COVER BACK

Band Cord Clamp

Sheet Earth Mark

Earth wire of AC Inlet.

Band Cord Clamp

Earth wire

B2-1

Masking Tape

(Cotton Tape)

DISASSEMBLY INSTRUCTIONS

REMOVAL

Put Masking Tape (cotton tape) around the Flat Package

IC to protect other parts from any damage.

(Refer to Fig. 2-1.)

Fig. 2-1

NOTE

REMOVAL AND INSTALLATION OF

FLAT PACKAGE IC

Some ICs on the PCB are affixed with glue, so be

careful not to break or damage the foil of each IC leads

or solder lands under the IC when removing it.

NOTE

Masking is carried out on all the parts located within 10

mm distance from IC leads.

Blower type IC

desoldering machine

Heat the IC leads using a blower type IC desoldering

machine. (Refer to Fig. 2-2.)

Fig. 2-2

NOTE

Do not rotate or move the IC back and forth , until IC

can move back and forth easily after desoldering the

leads completely.

When IC starts moving back and forth easily after

desoldering completely, pickup the corner of the IC using a

tweezers and remove the IC by moving with the IC

desoldering machine. (Refer to Fig. 2-3.)

Blower type IC

desoldering

machine

Fig. 2-3

Tweezers

Peel off the Masking Tape.4.

Absorb the solder left on the pattern using the Braided

Shield Wire. (Refer to Fig. 2-4.)

NOTE

Do not move the Braided Shield Wire in the vertical

direction towards the IC pattern.

Braided Shield Wire

Soldering Iron

Fig. 2-4

IC pattern

B2-2

DISASSEMBLY INSTRUCTIONS

Supply soldering

from upper position

to lower position

Supply the solder from the upper position of IC leads

sliding to the lower position of the IC leads.

(Refer to Fig. 2-6.)

Fig. 2-6

Soldering IronSolder

Absorb the solder left on the lead using the Braided Shield

Wire. (Refer to Fig. 2-7.)

Fig. 2-7

Soldering Iron

Braided Shield Wire

NOTE

Do not absorb the solder to excess.

When bridge-soldering between terminals and/or the

soldering amount are not enough, resolder using a Thin-tip

Soldering Iron. (Refer to Fig. 2-8.)

Fig. 2-8

Thin-tip Soldering Iron

NOTE

When the IC leads are bent during soldering and/or

repairing, do not repair the bending of leads. If the

bending of leads are repaired, the pattern may be

damaged. So, always be sure to replace the IC in this

case.

Finally, confirm the soldering status on four sides of the IC

using a magnifying glass.

Confirm that no abnormality is found on the soldering

position and installation position of the parts around the IC.

If some abnormality is found, correct by resoldering.

Solder temporarily

Soldering Iron

INSTALLATION

Take care of the polarity of new IC and then install the new

IC fitting on the printed circuit pattern. Then solder each

lead on the diagonal positions of IC temporarily.

(Refer to Fig. 2-5.)

Fig. 2-5

Solder temporarily

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Micon T20 User manual

Brand: Micon

Model: T20

Category: Network switches

Type: User manual

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Deutsch: Micon T20 Benutzerhandbuch

Micon T20 User manual

Micon T20 User manual

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