JVC AV-28H20, AV-32H20 Service Manual

S

S

B

SERVICE MANUAL

COLOUR TELEVISION

AV32H20EUS
AV28H20EUS

AV32H20EU
AV28H20EU

AV28H20EU

BASIC CHASSIS

ⅡⅡⅡⅡ

MF

AV28H20EUB

CONTENTS

! SPECIFICATIONS ････････････････････････････････
!

SAFETY PRECAUT IONS

! FEATU RES････････････････････････････････
! MAIN DIFFERENCE LIST ････････････････････････････････
!

SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････

! SERVICE ADJUSTMENTS ････････････････････････････････
!

PARTS LIST

★

OPERATING INSTRUCTIONS

★

STAND ARD CIRCUIT DIAGRAM

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････

･･･････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･･･････････････････････････････････

････････････････････････････････････････････････････････････････

･･･････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････ 2

･･････････････････････････････････････････････････････････

･･･････････････････････

･･････････････････････････････････････････････

･･･････････････････････ 5

･･････････････････････････････････････････････

･････････････････････ 12

･･････････････････････････････････････････

････････････････････････････････････

････････････････････････････････････････････････････････････････

･･･ 5

･･････

･････････････ 6

･･････････････････････････

････････････････

････････････････････････････････

4

31

2- 1

1

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

No.519 45
May 2002

A

V32H20EUS

A

A

V28H20EUS
V28H20EUB

SPECIFICATIONS

Item

Dimensions ( W××××H××××D ) 85 5m m ×5 50mm×5 68mm 78 0m m ×5 09mm ×499m m
Mass 53 .6 kg 40 .2 kg

TV RF System

Colour Syst em PA L / SEC A M / N TSC (Only in EXT mode)

Stere o Sy st em A2 (B /G,D/K )/ NICAM ( B/G, I,D /K,L )

Teletext System FLOF (Fastext)

Receiving Frequency

French CATV 116MHz ～ 1 72MHz / 22 0MHz ～ 469MHz

Intermediate Fr equency

VIF Carrier 38.9MHz ( B/G , I ,L)/ 33.95 MHz (L’)

SIF Carrier 33.4MHz ( 5 .5MHz :B/ G) / 32.9MHz ( 6.0MHz:I ) / 32.4MHz ( 6. 5MHz:L , D/K) / 40.4 5MHz (6.5MHz:L ’)

Colour Sub Carrier Freq.

SE CAM 4.40625MHz/4.25MHz

Power Input 220 – 240 V AC, 50Hz 220 – 240 V AC, 50Hz
Power Consumption 187W(Max) / 138W(Avg), standby : 2.6W 178W(Max) / 125W(Avg), standby : 2.6W

Aerial Input Term

Pictur e Tube Visi bl e siz e : 7 6cm, M eas ured dia gon ally Visi bl e size : 66cm , Meas ured dia gonal ly

Hi gh Vo l t ag e

CCIR (B/G ,D/K,I ,L, L ’)

TOP (German syst em)
WST(W orld Stan dard system)

VHF 47 MHz ～ 47 0M Hz

UHF

470MHz ～ 8 62MHz

PAL 4.43MHz

NT S C 3.58MHz / 4.43MHz

75Ωun ba l anc ed, C oaxial

1kV

+

-1. 5kV

31.0kV (at zero beam current)

AV 32 H 20 EU S AV 28 H 20 EU S / AV28 H2 0E UB

Content

Speake r (16c m×4c m) ov al typ e ×2

Au dio Output 7.5 W + 7.5 W

EX T-1/EXT - 2/E XT-3
(Input / Output)

S / Video

EXT-4 (Input) Video

Au di o (L /R )

S / Video

AUDIO OUT (Vari able)

Headphone jack

Remote Control Unit RM-C 54 H (AAA/R0 3 dr y batte ry×2) : (A V32H 20 EUS, A V28H20 EU S)

21 -p i n E uro c onnec to r
(SCART socket)

p-p

Y : 1V

C : 0.3V

1V p- p 7 5Ω( RCA pin jack )

50 0m Vr ms( -4dB s ), H i gh Im pe dance ( RCA pin jack )

Y : 1V

C : 0.3V

0～1Vrm s , Low Im p ed ance
(RCA pi n ja ck×2)

St ereo min i jac k (φ3.5mm )

RM-C 50( A AA/R0 3 d r y bat tery×2) : (AV28H20EUB)

POSITIVE (Negative sync Provided, when terminated with 75Ω)

p-p

(Burst signal, when terminated with 75Ω)

p-p

POSITIVE (Negative sync Provided, when terminated with 75Ω)

p-p

(Burst signal, when terminated with 75Ω)

De sign & speci f icatio ns ar e su bje ct to cha ng e wi thout no t ice.

2

No.51945

A

V32H20EUS

A

A

V28H20EUS
V28H20EUB

■■■■21-pin Euro connector (SCART socket) : EXT-1 / EXT-2 / EXT-3

(P-P= Peak to Peak, B-W= Blanking to white peak)

Pin

Signal Designation Matching Value EXT-1 EXT-2 EXT-3

No .

1 AUDIO R o utput 50 0m Vr ms(Nomina l) ,

Low impedance

2 AUDIO R i n put 50 0m Vr ms(Nomina l) ,

High i m pe danc e

3 AUDIO L outp ut 50 0m Vr ms(Nomina l),

Low impedance

4 AUDIO GN D ○○○

5 GND (B)

6 AUDIO L input 500mVrms(Nominal),

High i m pe danc e

7B input 700mV

8 FUNCTION SW

(SLOW SW)

9 GND (G)

10 SCL3 NC ○ NC

11 G in put 70 0mV

12 SDA3 NC ○ NC

13 GND (R)

14 GND (YS) ○ NC NC

15 R / C input R : 700mV

16 Ys i n put

17 GND(VIDEO output) ○○○

18 GND(VIDEO input) ○○○

19 VID EO outpu t 1V

20 VIDEO / Y inp ut 1V

21 COMMON GN D ○○○

Low : 0-3V, High : 8-12V, High
impedance

C : 300mV

Low : 0 - 0.4, High : 1 - 3V, 75Ω○

, 75Ω○○NC

B- W

, 75Ω○○NC

B- W

, 75Ω

B- W

, 75Ω

P- P

(Nega ti ve g oi n g s ync ), 75Ω○

P- P

(Nega ti ve g oi n g s ync ), 75Ω○ ○ ○

P- P

○

(TV OUT)

○○○

○

(TV OUT)

○○○

○○○

○○○

○○○

○○○

○

(only R)

(TV)

○

(LINE OUT)

○

(LINE OUT)

○

NC NC

○

(LINE OUT)

NC

NC

○

(only C )

NC

[Pin assignment]

No.51945

3

A

V32H20EUS

A

A

V28H20EUS
V28H20EUB

SAFETY PRECAUTIONS

1. T he des i gn of th is pr od uct con ta ins speci al har d ware , many
circuit s and components specially for saf ety purposes. For
con tinu ed pr ot ecti on , n o chan g es sh ould b e ma de to the o rig i nal
d esign un less a uth or ized in writi n g by th e manu fac t urer .
Replacem ent p arts m ust b e i d entic al to thos e u sed in th e or i gi n al

ci rcu its. S er v i ce sho ul d b e p er for m ed by qu alif ied p ers on nel
on ly.

2. Alte r ation s of the desi g n or circui tr y of t he prod ucts s h oul d not be
made. Any design alterations or additions will void the
manu fac t urer 's warra nt y and will f urth er r el i eve t he ma nufac tu rer

of r esp onsib ili ty for per s o na l injury or pr operty d am ag e res ul t ing
th erefr om.

3. M an y el ectr i cal an d mech anic a l p ar ts i n th e pr od uc ts ha v e
special safety-related chara cteristics. T hese characteristics are
oft en no t e vi den t f r om v i sua l insp ecti on nor ca n t he pro tect io n

aff orde d by th em nece ssarily be ob tain ed b y u s in g r ep l ac em en t
com po nents rated for hig he r vo l tag e, watt age, etc . R ep lac em en t
p arts whic h have th ese sp ecial s afet y ch ar act erist ics ar e
ide ntified in the parts list of Ser vic e manua l. El ectric al

components having such features are ide ntified by shading
on the sche mat ic s and b y (

manual. The us e of a sub sti tu te r ep lac em en t which do es n ot

h ave th e sam e s af ety c h ar ac t erist ics as t he reco mmen ded
replac ement par t sh ow n i n th e parts list of Ser v i ce man ual m ay

cause shock, fire, or other hazards.

!!!!

) on the parts list in Service

4. Don't shor t between the LIVE s ide ground and ISOLATED
(NE UTRAL) side ground or EARTH side ground when
repairing.

Some model's power circuit is partly different in the GND. The
diff erenc e of th e G ND i s sho wn b y th e LIVE : (") side GND, the

ISO LATE D(N EU TR AL) : (#) si de G ND and EART H : ($) side
GND. D o n't sh ort b et ween th e LIV E s i d e GND an d
ISO LATE D(N EU TR AL) si de GND or EAR TH side GN D an d
n ever mea sure w it h a mea sur i ng a ppa r atus ( osci l lo scop e etc.)
th e LI VE sid e GN D an d IS OLA TED(NE UTRAL ) s ide G ND or

EARTH sid e GND at the s ame time.
If above not e will not be kept, a fuse or any parts will be broken.

5. If any repair has been made to the chassis, it is recommended
th at t he B1 set ting shou l d b e c h ec ked or adju ste d ( Se e

ADJUSTM ENT OF B 1 POW E R SUPPLY).

6. The hi gh vol ta ge app lie d t o th e pi ctu r e tu be mu s t c on form with
th at sp ecifi ed i n S ervi ce man ual . E xc essi ve h i gh volt ag e c a n

cau se an i ncr e ase i n X- R ay em iss i on , arci ng an d possi b le
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
preve nt ed. If s ever e arc ing occur s, r emov e t he AC power
immed iate l y and de ter m i ne th e ca us e b y vi sua l insp ec t ion
(incor r ec t in stal lat i on, cr ac ke d or melte d hi gh vo lt age harn ess,

p oor so ld er ing, et c.) . T o m ai nt ain the prope r mi n imu m le vel of
sof t X- R ay em iss i on, c omp on en ts i n th e hi gh voltag e c i r cuitr y
incl ud i ng t he pict ure tu be must be t he e xact r ep lacem e nts or
alte rn at ives ap pr ove d b y th e manuf ac t urer of th e c omplet e
prod uct.

7. Do not c hec k hi gh volt ag e by dr aw i ng an arc. Use a hi gh volt age
meter or a hig h v oltag e pr ob e wit h a V TVM . Discha rg e th e
picture tube before attempting meter connection, by connecting
a cl i p le ad to th e gr ou nd f rame and conn ecti n g th e oth er end of

the lead through a 10kΩ 2W resi sto r to the anod e butt on .

8. When se r vic e is r equ ire d, ob serve th e or i gina l lea d dr ess. E x tr a
prec aut i on sh ou ld b e given t o assur e cor r ect l ea d dress in th e

high vol tag e circui t a rea. W her e a s hor t c i r cuit h as occ u rr e d,
th ose co mpon ent s tha t indica te evide nce of ove r hea ting should
b e r e place d. A lways u s e th e manuf act ur er 's rep lacem ent
components.

9. Isol ation Check

(1) Dielectric Strength Test

(2) Leakage Current Check

(Safety for Electrical Shock Hazard)

Af ter r e- ass embl in g th e p r odu ct, always per f orm an i solat io n
ch eck on the expo s ed me tal p ar ts of t he cabin et ( a nte nn a
ter m i na ls, vid eo /au dio i npu t and outpu t t ermi n al s, C on trol kn obs,

metal cabin et, sc r ew he ad s, ea rph one j ack, con tr ol s haf ts, etc.)
to be su re th e p r odu ct is s af e t o o pe rate with ou t d an ger of
elect rical shoc k.

The iso lation be tw een the AC pr im a ry ci rcu it an d al l me tal p arts
exp osed t o the us er, p ar ticular ly an y e xpos ed met al p art having a

retu rn p ath to t he c hass is sho uld withs tan d a vol t age of 3000 V
AC (r.m. s.) for a period of one sec ond.

(. . . . W it hstan d a v o lt age of 110 0V A C (r .m. s.) t o an ap plianc e

rate d up to 12 0V , an d 3 00 0V AC ( r.m. s.) to an ap pl i an c e r at ed
200V or more, for a period of one second.)
This meth od of test r equi res a test equipment n ot g enerall y fou nd

in t he serv ic e trad e.

Plug th e AC l in e c ord d irect ly into the A C ou tlet ( d o not use a lin e
isol ati o n transf orm er du r ing this ch eck.). U sin g a " Lea kag e
Current T este r", me as ur e th e l ea k ag e cu rr e nt f rom eac h ex p os ed

metal p ar t of the cabine t, p art icu lar ly any e x pos ed me tal p art
h aving a re turn pa th to the ch assis , to a kn own go od ea rt h
grou nd (w a ter pip e, e tc.). An y l eaka ge c ur r en t must n ot e xceed

0.5mA AC (r.m.s.).
Howev e r, in trop ic al ar ea , th is mu st no t ex ce ed 0.2 mA AC

(r.m.s.).

""""

Alte rn at e Che ck M et hod

Plug th e AC l in e c ord d irect ly into the A C ou tlet ( d o not use a lin e
isol ati o n tran sfor m er dur i ng this c he c k.). Use an AC vo lt meter
h aving 1 00 0 oh ms pe r vol t or mor e s ens it i vity i n th e fo llowi ng

mann er . C on nec t a 1 50 0Ω 10W res ist or par a lle le d b y a 0 .1 5µF
AC-type c apa cit or bet ween an expo sed met al pa rt and a kno wn

g ood e ar th gr o und (water pi pe , etc.) . M eas ur e th e A C volt ag e
acr os s th e res ist or wi th th e AC vo l tm eter. Move th e r es i stor
con nec tion to e ach exp ose d me tal part, p art i cularly any exp osed
metal p ar t havi n g a r etu rn pat h to the ch assis, and m easu r e th e
AC vol tag e ac ros s the res ist or. No w , re v er se th e pl u g in th e AC

ou tl et and re pe at eac h mea suremen t. An y vol t ag e me asu re d
must no t e xc eed 0 .7 5V AC (r.m. s.) . This c orre spo nds to 0 .5mA
AC (r.m. s.).
Howeve r, in tropica l area, this must n ot exce ed 0 .3V AC ( r .m.s.).
This corresponds to 0.2mA AC (r.m.s.).

AC VOLT MET ER
(HAVING 1000 Ω /V,

OR MOR E SENSIT IVITY)

0.15μF AC-T YPE

PLACE THIS PROBE

1500 Ω 10W

GOOD EARTH GROUND

ON E A C H EX PO SE D
ME T AL PA RT

4

No.51945

A

A

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FEATURES

V32H20EUS
V28H20EUS
V28H20EUB

"

New c hassi s d esign ena bl e us e of an inte rac tive on screen

control.

"

The TELETEXT SYSTEM has a built-in FASTEXT (UK system),

TOP (Germ an syst em) and W ST (world stan dard system)
system.

"

Be caus e th is TV un i t corr esp on ds t o m ultipl e x br oa dca s t, u ser s

can enjoy music programs and sporting events with live realism.

In ad dition , BI LIN GU AL pro gr am s can be h ear d in th ei r or i g in al
language.

TV EXT-1 EXT-3

EXT-2

"

Users can make VCR dubbing of picture and sound by controlling

th e AV sel ec tor to s e le c t an o pti o na l so urc e at th e EXT- 2 outp ut

sh own i n figu re.

EXT-4

MAIN DIFFERENCE LIST

Model Name

!

Par t Name

MAIN PWB ASSY SMF-1401A-U2 SMF-1402A-U2

POWER & DEF PWB ASSY SMF-2401A-U2 SMF-2402A-U2

CRT SOCKET PWB ASSY SMF-3401A-U2 SMF-3402A-U2

FRONT C ONT ROL PW B ASSY SMF- 84 01A- U2 SMF- 8402 A- U2

!

FRONT C AB I NET A SS Y LC10 376- 020A -U LC 1066 2-02 3A-U LC 1066 2-02 4A-U

!

DOOR LC 20 265- 017A -U LC 20 265- 024A -U

!

POWE R KNOB LC 30 578- 007B-U LC 3057 8- 00 4A -U

!

REAR COVER LC10378-004B-U LC10664-003B-U LC10664-001E-U

JV C MA RK LC 40 354- 003A-C LC 4035 4- 00 1C- C

!

RATING LABEL LC20379-027A-U LC20379-026A-U LC20379-025A-U

AV32 H20E US AV28 H2 0E US AV28 H20E UB

EURO LABEL AEM 10 52-0 63 -E AEM 1052 -064 -E AEM 10 52-0 96 -E

REMOTE CONTROL UNIT RM -C54H-1C RM-C50-1C

No.51945

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A

V32H20EUS

A

A

V28H20EUS
V28H20EUB

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unplug t he po we r c ord.

2. Rem ov e t he 12 (28 ” m od el s), 13 ( 32 ” m ode l) scr ews ma r ked A

as s hown in t he F i g. 1.

3. Withdr a w t he r ear co ver to wa rd you .

REMOVING THE CHASSIS

"

After removing the rear cover.

1. Sli ght ly rai se th e bo th si de s of the c hass i s by h and and r e mo ve

th e two c l aws u nd er th e b oth sid es of the chass i s fr om t he fro nt
cab inet .

2. Withdr a w t he chass is backw a rd .
(If necessary, take off the wire clamp, co nnectors etc.)

REMOVING THE SPEAKER

"

After removing the rear cover.

1. Remove t he 2 scr ew s m ar ked B, and r em ove th e sp eake r hold er

as s hown in Fi g. 1.

NOTE : When r em oving t he sc r ew s marked B of t he sp eake r

remove t he lo w er side sc r ew fi r s t, an d t hen remove th e
up per one .

2. Remove the 2 screws C a ttac hing th e sp eak er.

3. Fol l ow th e s am e st eps wh en rem oving the oth er ha nd spe ake r.

REMOVING THE AV TERMINAL BOARD

" After removing the rear cover.

1. Remove the 3 scr ew s m ar ked D as shown in t he F ig. 1 .

2. Remove the 2 cla ws mark ed E under the CHASSIS as shown in

Fig. 2.

3. Remove the AV TERMINAL BOARD slightly in the direction of

arrow F as shown in Fig. 2.

REMOVING THE POWER & DEF PWB

" After removing the rear cover.
"

After removing the rear CHASSIS.

1. Remove the 3 scr ew s marked G .

2. Rem ove the PO WER & DEF PW B.

CHECKIN G THE PW BOARD

To c h ec k the back s i de of th e PW B oard.

1) Pull out the ch assis. ( Refer to REMOVIN G TH E CH AS SIS ).

2) Erect the c hassis vertically so that you c an easily check the
b ack side of the PW B oard.

[CAUTION]

"

When erecting the chassis, be careful s o that there will be no

con tact ing with ot her PW Boar d.

"

Be fore tur n ing on po wer, ma ke sur e tha t the wire co nnecto r is

prop er l y con nected .

"

W hen co ndu cti ng a c h ec k wi th p ow er su pplied , b e sure to c onfir m

th at t he CRT E AR T H WI RE (B RAIDED AS S’Y) is co nne c ted t o

th e C R T SOC KE T PW b oard.

WIRE CLAMPIN G AND CABLE T Y ING

1. Be sur e t o clamp th e wire.

2. Never r em ove th e c able tie use d f or tying th e wires to ge the r.
Should it be inadver t ent ly removed , b e sure to tie th e wires wi th

a n ew c able tie.

AV SW PWB

AV TERMINAL
BOARD

E

E

Fig . 2

6

No.51945

A

A

A

FRONT CABINET

(

)

(×3)

(

)

(

)

FRONT
C ONT RO L

PWB(1/2 )

CRT
SOCKET
PWB

FRONT
C ONT RO L
PWB(2/2 )

V32H20EUS
V28H20EUS
V28H20EUB

B

×

2

SP EAKER

C

G

×

3

×

2

MICOM PWB

100Hz PWB

POWER & DEF.
PWB

CLAW

REAR COVER

AV TERMINAL
BOARD

AV SW
PWB

CLAW

MAIN
PWB

CHASSIS

D

POWER CORD

Thi s expl o de d vi ew des cribe s ab out

AV 28H2 0EUS / AV28 H20EUB.
Alth ou gh AV 32 H 20E US are sl i ght ly

diff erent from t his f ig ur e, you c an use
th e e xpl od ed vi ew f or disass em bl i ng

th e A V32 H 20E U S in sam e ste p as
AV 28H2 0EUS / AV28 H20E UB.

(×12 : 28” mod el s)

A

(×13 : 32” mod el )

Fig . 1

No.51945

7

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V32H20EUS

A

A

V28H20EUS
V28H20EUB

REMOVING THE CRT

∗

Replacem en t of th e CRT s ho ul d be p er for m ed b y 2 or mor e

p ers ons.

• After removing the cover, chassis etc.,

1. Putti ng the CRT chan ge table o n sof t cl oth , th e C R T cha nge ta ble
sh ould al so b e c over e d w i th s uch soft clot h (s ho wn i n Fig. 3) .

2. W hile kee pin g the s urfac e of C RT down , mou nt the TV s et o n t he
CRT change table balanced will as shown in Fig.4.

3. R em ov e 4 sc rews mark e d by arro ws with a box ty p e scr e w dri ver
as s hown in Fig. 4.

• Si nc e the cab i net will drop w h en scr ews h ave b een rem o ve d, be

sure t o su pp ort t he cabinet with hands.

4. After 4 screws have been removed, put the cabinet slowly on
cloth (At th is time, be ca refully so as not to damage th e front

sur fac e of th e c abin et) s h ow n i n Fig.5 .

• The CRT sh ould b e ass embled accor di n g to th e o pp osi te
sequence of its dismounting steps.

∗

The C RT cha ng e t able sh ould pr ef erab ly b e smaller that th e CRT

sur fac e, and its h ei gh t be abo ut 35c m.

CRT CHANGE TABLE

AP PROX.
35 cm

CLOTH

Fig. 3

CRT

CRT
CHANGE
TABLE

BOX
TYPE

SCREW
DRI VER

CABINET

Fig. 4

CRT

CRT
CHANGE TABLE

Fig. 5

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No. 51945

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REPLACEMENT OF CHIP COMPONENT

! CAUTIONS

1. Avoid heating for more than 3 seconds.

2. Do n ot ru b the elect ro des an d the r esist p arts of the p att ern.

3. W hen r em oving a chip par t, mel t th e s older ad equately.

4. Do n ot reuse a ch ip p ar t afte r re mo v ing it .

! SOLDERING IRON

1. Use a hig h i ns ulatio n s ol der i ng i r on with a thi n poin ted e nd of it.

2. A 3 0 w s older i ng iron is r ec ommend ed for easily r em oving p ar ts.

!

REPLACEMENT STEPS

1. How to remove Chip parts

####

Resi st o rs, capacitors , etc

(1) As sh own in the f ig ur e, pu sh th e pa rt w ith tw ee zer s and

alte rn at ely melt the s ol de r at eac h end.

(2) Sh if t with tweeze rs and r em ove th e c h i p p art.

#### Tran s istor s, diodes , variabl e r esistor s, etc

(1) Ap pl y e xt ra so ld er to eac h le ad .

SOLDE R SOLDE R

V32H20EUS
V28H20EUS
V28H20EUB

2. How to install Chip parts

####

Resi st o rs, ca pacit ors , etc

(1) Apply sold er to the pattern as indic ate d in the figure.

(2) Gr asp the c h i p p art with tw ee zer s and pl ac e it on th e s old er.

The n hea t and me lt th e so lder a t both ends of t he chi p part.

#### Tran s istor s, diodes , variabl e r esistor s, etc

(1) Apply sold er to the pattern as indic ate d in the figure.
(2) Gr asp th e ch ip p art wit h t we ezers an d pl ac e it on th e so l der .

(3) First s older lead A as i ndica ted in the fi gure.

A

(2) As sh own in the f ig ur e, pu sh th e pa rt w ith tw ee zer s and

alte rn at ely melt th e sol d er at each le ad . S hi ft an d r em ove the
chip part.

(4) The n so lder le ads B and C.

Note : A fte r re moving t he part, r emove rem ain ing solder fr o m the

pattern.

C

A

C

No.51945

B

B

9