JVC GM-P421U User manual

No.51957
GM-P421U
GM-P420UG
1COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD. May 2002
GM-P421U
GM-P420UG
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････････････････････
･･････････････････････････････････････････････････････････
･････････････････････････････ 2
★
OPERATING INSTRUCTIONS(Appendix)････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････
･･････････････････
･････････ 1- 1
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 4
!MAIN DIFFERENCE LIST ････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 5
!TECHNIC AL INF ORMATION ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････
････････････････････････････････････････
････････････････････ 6
!PRECAUTIONS FOR USE ････････････････････････････････
････････････････････････････････････････････････････････････････
･･････････････････････････････････････････････････････
････････････････････････････････････････････
･･････････････････････ 8
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････
････････････････････････
････････････ 11
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････････････
･･････････････････････････････････････････
･････････････････････ 35
★ST ANDARD CIRCUIT DIAGRAM(Appendix) ････････････････････････････････
････････････････････････････････････････････････････････････････
･･････････････････････････････････････
････････････
･･････2- 1
!PARTS LIST ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ 51
!SPECIFICATION(Pin assigment / Dimensions) ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････
････････
････ 75
BASIC CHASSIS
S3
SERVICE MANUAL
42'' PLASMA DISPLAY MONITOR

No. 51957
GM-P421U
GM-P420UG
2
SPECIFICATIONS
Item Conte nt
Model GM-P421U(Silver) / GM-P420UG(Gray)
Dimension (W×
××
×H×
××
×D) 103.5cm×64 .0cm×8 .9cm (40- 3 /4” ×25-1/4”×3- 5/ 8 ”)
Mass 32.3kg (71.1lbs.)
Type Pl as ma di spl a y
VI DE O A, B NTSC, PA L-M, PAL-N
Compatible
Sy st em COMPONENT 48 0 i, 576 i, 480 p, 720 p, 10 80 i (10 35 i)
Power requi rements 120VAC, 50Hz / 60Hz
Rated input current 2.6 A
Ef fect iv e s cre en dim en si ons (W ) 92 .1c m ×(H) 51.8cm, (Diagonal)105.7cm (36-3/8”×2 0- 1/2 ” , 41- 5/ 8” )
Nmber of pixele Hor izont al 85 3 ×Ve rt ical 4 80
Pix el pitc h Hor izont al 1. 08mm ×Ve rt ic al 1. 08 mm
Cell pitch Hor izont al 0. 36mm ×Ve rt ic al 1. 08 mm
Display colors 16.77million colors (256 colors for each of RGB)
Aspect ratio 16:9 (Wide format)
Au dio po wer output Sp eak er ou t : 6～16Ω, 3W +3W ( TYP a t i mped an ce 6 Ω)
Environment Tem pe rature : 0～40 ℃
Relative hu mid it y : 2 0～80 % ( no n-con de nsing )
Pr essu re : 700 ～11 14 hP a
Storage Tem pe rature : - 20 ～60 ℃
Relative hu mid it y : 1 0～8 5%(non -c on den sing)
Pr essu re : 300 ～11 14 hP a
VI DE O A
(IN / OUT)
・Vi de o in pu t : 1V( p-p) / 75 Ω, BNCterminal×1
・Vide o out put : 1V( p- p) / 75Ω, BNCterminal×1
・Au di o in pu t : 5 00mV(r ms) / h ig h im p eda nce , Pin j ack t er mina l ×2(L/ R)
VI DE O B
(INPUT)
・Y/C input : Y/C terminal×1
Y : 1V(p-p) / 75Ω
C : 0. 28 6V(p-p) / 75Ω(NTSC)
C : 0 .3V (p -p ) 7 5Ω(PAL)
・Vi de o in pu t : P in jack term in al ×1, 1V(p-p) / 75Ω
・Au di o in pu t : P in jack term in al ×2(L/ R) , 500 mV( r ms) / hig h im pe da nce
COMPONENT/
RGB B
・COMPONENT input : BNC terminal×3
Y : 1V(p-p) / 75Ω
PB/B-Y : 0.7V(p-p) / 75Ω
PR/R-Y : 0.7V(p-p) / 75Ω
・RGB input : BNC terminal×5
[An alo g R GB ] R : 0. 7V( p- p) / 75Ω
G : 0. 7V ( p-p ) / 7 5Ω
B : 0. 7V (p- p ) / 7 5Ω
G on s yn c : 1V(p-p) / 75 Ω( neg at i ve sync )
[ Horizontal sync (HD) ] HD : 0.3～5V(p-p) / 1kΩ(positive / negative polarity)
[ Composite sync (Cs) ] Cs : 0.3～5V(p-p) / 1kΩ(positive / negative polarity)
[ Vert ic al sync (VD) ] VD : 1～5V(p-p) / 1kΩ(positive / negative polarity)
・Au di o in pu t : Pin j ack t er mi na l×2( L/ R) , 50 0mV( r ms) / hi g h im pe da nce
RGB A ・RGB input : D-sub 3-row 15-pin terminal×1
Vi de o s ig na l : 0. 7V( p- p) / 75Ω
G on s yn c : 1V(p-p) / 75 Ω(negative syncy)
[ Horizontal sync (HD) ] HD : 0.3～5V(p-p) / 470Ω(positive / negative polarity)
[ Composite sync (Cs) ] Cs : 0.3～5V(p-p) / 470Ω(positive / negative polarity)
[ Vert ic al sync (VD) ] VD : 1～5V(p-p) / 470Ω( pos it ive / ne gat ive p olarit y)
・Au di o in pu t : St er eo min i jack t er min al×1, 5 00m V( rms) / h ig h im p eda nce
REMOTE
(D-sub 9pin)
・RS-232C input : D-sub 9-pin terminal ×1
・MAKE : Mini DIN 4pin
・WIRED : Stereo mini jack terminal×2
OPTI ON U se exc lu si vely f or JVC’s o ptio na l par ts
SP EAKE R OUT Im pe da nce 6Ω～ 16Ω(L/R)
INPUT/OUTPUT
TERMINALS
AUDIO OUT Pin jack terminal×2(L/ R), O uto ut imp eda nce 60 0Ω
Remote control unit×1(RM- C576 ) , AA /R 6-si ze d ry cell ba tte ry×2( fo r op er ation ch eck)Acc ess ories
Remote control cable×1, Power cord (approx 2.5m)×3
Design an d specifications are subject to change without notice.

No. 51957
GM-P421U
GM-P420UG
3
!TIMING SPECIFICATION & SCAN SIZE
Input picture fo rmat Scan size
Fr equ enc y Tota l pi xel Vi si ble ar ea
p
ixel Scan size
Vert. Hori. Dot
clock Hori. Vert. Hori. Vert. Vert. Vert.
fVi fHi fci Hi Vi Hai Vai Kh Kv
Divide Item St and ar d
Hz kHz MHz pixel/line line/frame pixel/line line/frame
Dis
p
la
y
mode
%%
regular 95.00 95.00
full 95.00 95.00
panoramic 95.00 90.00
NTSC, PAL60,
PAL M, NTSC4.43
(B/W-60Hz)
SMPTE 244M 59.94 15.734 14.32 910 525 768 485
zoom 95.00 71.25
regular 95.00 95.00
full 95.00 95.00
panoramic 95.00 90.00
COMPOSITE
Y/C PAL, SECAM
PAL N
(B/W-50Hz)
50.00 15.625 17.73 1135 625 922 575
zoom 95.00 71.25
regular 95.00 95.00
full 95.00 95.00
panoramic 95.00 90.00
480i ITU-R BT 601-4
(CCIR Rec.601) 59.94 15.734 13.50 858 525 720 485
zoom 95.00 71.25
regular 95.00 95.00
full 95.00 95.00
panoramic 95.00 90.00
576i ITU-R BT 601-4
(CCIR Rec.601) 50.00 15.625 13.50 864 625 720 575
zoom 95.00 71.25
regular 95.00 95.00
full 95.00 95.00
panoramic 95.00 90.00
480p SMPTE 293M 59.94 31.468 27.00 858 525 720 483
zoom 95.00 71.25
720p SMPTE 296M 60.00 45.000 74.25 1650 750 1280 720 full 95.00 95.00
1080i SMPTE 274M 60.00 33.750 74.25 2200 562.5 1920 540 full 95.00 95.00
COMPONENT
1035i BTA S-001A 60.00 33.750 74.25 2200 562.5 1920 517.5 full 92.75 92.75
regular 95.00 95.00
full 95.00 95.00
panoramic 95.00 90.00
RGB 15k-60Hz (SMPTE 244M) 59.94 15.734 14.32 910 525 768 485
zoom 95.00 71.25
regular 95.00 95.00
full 95.00 95.00
panoramic 95.00 90.00
PC/R GB 15k
(RGB 15k-50Hz) 50.00 15.625 17.73 1135 625 922 575
zoom 95.00 71.25
regular 100.00 100.00
PC98 (NEC) 56.42 24.82 21.05 848 440 640 400 full 100.00 100.00
regular 100.00 100.00
PC/VGA 400
VGA400-70 (IBM) 70.09 31.47 25.18 800 449 640 400 full 100.00 100.00
regular 100.00 100.00
VGA-60 (Industry std.) 59.94 31.47 25.17 800 525 640 480 full 100.00 100.00
regular 100.00 100.00
VGA-72 VESA std. 72.81 37.86 31.50 832 520 640 480 full 100.00 100.00
regular 100.00 100.00
VGA-75 VESA std. 75.00 37.50 31.50 840 500 640 480 full 100.00 100.00
regular 100.00 100.00
(Wide VGA-60) (Industry std.) 59.97 31.72 34.01 1072 529 852 480 full 100.00 100.00
regular 100.00 100.00
PC/VGA 480
MAC 13” (Apple) 66.67 35.00 30.24 864 525 640 480 full 100.00 100.00
regular 100.00 100.00
SVGA-56 VESA guidelines 56.25 35.16 36.00 1024 625 800 600 full 100.00 100.00
regular 100.00 100.00
SVGA-60 VESA guidelines 60.32 37.88 40.00 1056 628 800 600 full 100.00 100.00
regular 100.00 100.00
PC/SVGA
SVGA-70 VESA guidelines 72.19 48.08 50.00 1040 666 800 600 full 100.00 100.00
regular 100.00 100.00
XGA-60 VESA guidelines 60.00 48.36 65.00 1344 806 1024 768 full 100.00 100.00
regular 100.00 100.00
PC/XGA
XGA-70 VESA std. 70.07 56.48 75.00 1328 806 1024 768 full 100.00 100.00

No.51957
GM-P421U
GM-P420UG
4
＜
SAFETY PRECAUTIONS
1. The d esi gn of th is pr od uct con ta in s sp eci al hard wa re , ma ny
circuits and components specially for safety purposes. For
con ti nu ed pr ot ection , n o chan g es sh ou ld b e ma de to the o rig i nal
d esign un less a uth ori zed in writi n g by th e ma nu fact ur er .
Rep l acemen t p ar ts m ust b e id ent ic al to thos e u sed in th e or igi n al
circu it s. S er vice sho uld b e p er for med by qu alif i ed p ers on nel
on ly.
2. Al te r ation s of t he desig n or cir cuitry of t he pr od ucts sh oul d not be
made. Any design alterations or additions will void the
m anu fact ur er 's w arr a nt y and w ill f ur th er r eli eve t he ma nu factu rer
of resp onsi b il ity for per so na l i njur y or p r op erty d am ag e r esult in g
th er efr om .
3. M an y e l ectr ical an d m ech anica l p arts i n th e pr od ucts ha ve
special safety-related characteristics. T hese characteristics are
oft en no t e viden t f r om vi sua l insp ecti on n or ca n t he pr o tect io n
aff or de d by th em nece ssari ly b e ob tain ed b y u sin g r ep lacem en t
compo ne nts ra ted f or hig he r vo l tag e, watt ag e, etc. R ep lacemen t
p arts wh ic h ha ve th ese sp ecial s afet y ch ar act er ist ics ar e
identified in the parts list of Servic e manual. El ec tric al
components having su ch features are identified by shading
on the sche matics and by ("
""
") on the parts list in Service
manual. T he us e of a sub stitu te r ep la cem en t w hich do es n ot
h ave th e sam e saf ety ch ar act er ist ics as t he reco mmen de d
r eplac em ent par t sh ow n i n th e p ar ts l ist of S er vice m an ual m ay
cause shock, fire, or other hazards .
4. Do n't shor t between the LIVE side ground and ISOL ATED
(NEUTRAL) side ground or EARTH side ground when
repairing.
Some model's power circuit is partly different in the GND. The
diff er enc e of th e G ND i s sho wn b y th e LIV E : (#) side GND, the
ISO LATE D(N EUTRAL) : ($) side G ND and EARTH : (%) side
GN D. Do n't sh or t b et we en th e LIV E sid e GN D an d
ISO LATE D(NEUTRAL) side GND or EARTH sid e GND and
n ever m ea sure w it h a m ea suri ng a ppa r atus (oscil lo scop e etc.)
th e LI VE sid e GND an d IS OLA TED (N E UTR AL ) sid e G ND or
EARTH sid e GND at th e s ame time.
If above note 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 PDP volt age se tting sh ould be che cked or a djust ed .
6. W hen se r vi ce is r equ ir e d, ob serve th e or igi na l l ea d dr ess. E xtra
pr ec aut i on sh ou ld b e g ive n t o assur e cor rect lea d dr ess in th e
hig h vol tag e cir cuit a r ea. W her e a s hor t cir cuit h as occu rre d,
th ose co mp on ent s tha t i ndica te evi de nce of ove r hea ti ng sho ul d
b e re pl ace d. A l wa ys u se th e ma nuf act ur er 's rep l acemen t
components.
7. Isolation Check
(Safety for Electrical Shock Hazard)
Af ter r e- ass emb l in g th e p r odu ct, alw ays per f orm an i solat io n
ch eck on the expo sed me tal p arts of t he cabin et ( a nte nn a
ter m ina ls, vid eo /au dio i npu t and ou tpu t t er mi n als, C on tr ol kn obs,
m etal cabin et, scr ewhe ad s, ea rph one j ack, con trol shaf ts, etc.)
to be su re th e p r odu ct i s s af e t o o pe r ate with ou t d an ger of
elect rical shoc k.
(1) Dielectric Strength Test
The i so lati on be tween the A C pr im a ry ci rcu i t an d all me tal p ar ts
exp ose d t o th e us er , p ar ti cularl y an y e xp os ed met al p art h avi ng a
r etu rn p ath to t he chass is sho ul d withs tan d a vol t age of 1 50 0V
AC (r.m.s.) for a period of one second.
This method of test requires a t est equipment n ot generally found
in t he servic e trad e.
(2) Leakage Current Check
Pl ug th e A C lin e c ord d irect ly in to th e A C ou tlet (d o n ot use a li n e
isol atio n tr ansf or m er du rin g this ch eck.) . U sin g a " Lea kag e
Cur r ent Teste r", me asure th e lea kag e cu rr e nt f rom each exp osed
m etal p art of the ca bine t, p art icu lar ly any e xpos ed me tal p ar t
h aving a re tur n pa th to t he chassis , t o a kn own go od ea rt h
gr ou nd (wa ter pip e, e tc.). An y leaka ge cur ren t m ust n ot e xceed
3.5mA AC (r.m.s.).
How eve r, in tr op ic al ar ea , th is mu st no t exce ed 0.2 mA AC
(r.m.s.).
"
""
"Alte rnat e Che ck M ethod
Pl ug th e A C lin e c ord d irect ly in to th e A C ou tlet (d o n ot use a li n e
isol atio n tran sform er dur ing t his che ck.) . Use an AC vo lt me ter
having 1000
Ω / V or more sensitivity in the following manner.
Con nect a 1 500 Ω10W resistor paralleled by a 0.15µF AC-type
cap acitor b etw e en an e xpos ed me ta l p ar t a nd a kn own g oo d
ea rt h gr o und ( wa ter p ipe, etc.) . M eas ur e t he AC vol ta ge acr oss
the resistor with the AC voltmet er. Move the resistor connection
to e ach e xpos ed met al pa rt, par ti cu larly an y exp ose d m eta l p ar t
h aving a re turn pa th to th e ch assis, an d me asur e th e AC vo lt ag e
across t he res is tor. Now, reverse the plug in the AC o utlet an d
r epe at each m easu re m ent . A ny volta ge m easu r ed m us t n ot
exce ed 0 .7 5V A C (r .m. s.) . This cor resp on ds to 3.5 mA AC
(r.m.s.).
However, in tropical area, this mu st not exceed 0.3V AC ( r.m. s.).
This corresponds to 0.2mA AC (r.m.s.).
0.15
μ
F AC-T YPE
1500 Ω10W
GOODEARTH GROUND
PLACE THIS PROBE
ON E A C H EX PO SE D
ME T AL PA RT
ACVOLTMETER
(HAVING 1000 Ω/V,
OR MOR E SENSIT IVITY)

No. 51957
GM-P421U
GM-P420UG
5
MAIN DIFFERENCE LIST
The differences between these two models are its color and class of EMC : GM-P421U is silver and is
categorized in class B, while GM-P420UG is gray and is categorized in class A.
GM-P421U(Silver) GM-P420UG(Gray)
"PART S NAME
PART S No. PART S No.
MAIN PWB FX- 1145A FX- 1158A
CO NTROL PWB FX- 4071A FX- 4077A
RG B INPUT PWB FX- 6075A FX- 6088A
VIDEO INPUT PWB FX- 6076A FX- 6089A
SP TERMINAL L PWB FX- 6077A FX- 6090A
SP TERMINAL R PWB FX- 6078A FX- 6091A
LED PWB FX- 7026A FX- 7031A
TEMP. SENSOR PWB FX-7035A FX-7037A
LINE FILTER & AUDIO PWB FX- 9082A FX- 9084A
"RO LL R LABEL LC2 0970-001A-0L LC2 0970-002A-0L
FCC LABEL LC3 1038-011A
CO RE FILTER QQR0491-001(×5) QQR0491-001( ×4)
"FRONT FILTER LC3 2041-001A LC3 1401-001B
"FRONT PANEL LC1 0528-005A LC1 0528-006A
"CO NTROL BASE ASSY LC2 0358-001B LC2 0358-002A
TOP CARTON LC2 0255-013B LC2 0255-015B

No. 51957
GM-P421U
GM-P420UG
6
TECHNICAL INFORMATION
PDP (PLASMA DISPLAY PANEL) DESCRIPTION
!CAUTION
Al th ou gh a PDP is ma de w it h h ig hl y a dva nce d p recis io n, thi s d oes n ot n eces sar il y me an al l of th e cells ope ra te corr ectl y.
The PDP inevitably includes cell that do not light or light constantly.
If t he sp ecificat i ons ( PDP p erf orman ce) ar e uncl e ar at t he t ime of ship me nt, an ad eq uat e d escr ip ti on can not be c on ve yed to t he customer.
In eve nt of i n quir ies f ro m c usto me rs re ga rd ing PDP p er for m an ce, chec k th e f ol lo w in g s pecificat i ons in ord er to of fer a sui ta ble reply.
!CELL ARRANGEMENT
The PDP i s c ons tru cted of fron t and r e ar g lass sub strate s p ro vi de d with r es pec tive di scha rg e elec trod es. Be tween t hes e, ne on f or
disch ar ging an d xeno n f or g ene r ati ng ul tr a vio l et r a ys ar e encl os ed .
On e p ict ur e el emen t ( p ix el ) is co mp osed of Re d, G re en a nd Blu e ( RGB) cel ls. Th e cell pi tch i s 0 .3 6m m ho rizo nta l ( 1.0 8m m p er pi xel) by
1.08mm vertical.
As sh ow n i n Fi g. 1, t he c el ls a r e ar ran ged for e ach R / G / B c olor . A p i xel con sist s of each cell of R /G/ B/ co lor. T he s iz e of a cell is
0.3 6 mm ho rizo nta lly and 1 .08 mm ve rt ic al ly.
R G B R G B
RGBRGB
GBRG B
GBRGB
R
R
RGBRG B
RGBRGB
GBRG B
GBRGB
R
R
1st
p
ixel
arra
y
2nd
p
ixel
arra
y
852th
p
ixel
arra
y
853th
p
ixel
arra
y
1ST
p
ixel
line
2nd
p
ixel
line
479th
p
ixel
line
480th
p
ixel
line
Horizontal
(
H
)
Vertical
(
V
)
Direction
H 1.08mm
Pitch of
p
ixel
H 0.36mm
Pitch of cell
V 1.08mm
Pitch of pixel
(
Pitch of cell
)
R cell
G cel l
B cel l
One
p
ixel
(
1dot
)
Fig. 1 PIXEL (CELL) ARRANGEMENT

No. 51957
GM-P421U
GM-P420UG
7
!PIXEL FAULT
The r e ar e two p ixe l f aults - b rig ht fau lt an d d ar k f aul t - tha t ar e r espe ctivel y d efi n ed as f oll ows.
( 1) BR IG HT F A U LT
In thi s pixel f ault, a c ell tha t sh ou ld no t l igh t ori g in al ly i s li ght in g or flash ing on an d off .
For ch ecki ng this pi xel f ault, in pu t A LL BL AC K SC REE N an d fin d o ut th e ce ll t hat is l ight i ng or flash ing on an d off.
(2) DARK FAULT
In thi s pixel f ault, a cell th at s hou ld l ight ori gin all y i s not li g hting or n ot f l ashin g on a nd off or lig hti n g wit h t he br ig ht ness t wice as b rig hte r as
originally lighting.
For ch ecki ng t hi s pixel f ault, in pu t 10 0% of e ach RG B colo r an d fi nd o ut t he c el l tha t i s n ot li ght ing or no t fl as hi ng on an d off or lighting with
th e bri g htn ess a s br igh ter as or igin al ly lig hti n g.
(3) PIXEL FAULT SPECIFICATION
Screendisplay Criteria for number of faulted cell Criteria for number of
con secut ive f aul te d c el l
Br ight fa ul t Al l bl ac k scr een A zone: 1 or less than 1 in each color
B zone: 2 or less than 2 in each color
2 or Les s th an 2
con secut ivel y
Red level 100% on entire screen
Gr ee n l ev el 10 0% on en tir e scr eenDark fa ult
Bl ue l eve l 10 0% o n ent ire scr een
A zone: 2 or less than 2 in each color
B zone: 6 or less than 6 in each color
2 or Les s th an 2
con secut ivel y
( Note) A- zon e: Ce nte r po rtio n (ar e a e nclos ed by 1 /4 ver ti cally fr o m t he to p a nd b ott om an d 1 /4 ho rizon ta ll y f ro m the r ig ht an d l ef t
sides. )
B-zone: Other area
( Note) The con secu tive p ixe l f aul t t ha t ar e di a gon ally or i n ten si vel y g ene ra ted s hal l b e i nt er pret ed as f ol lows:
B zone
A zone
52.9cm
(1/4V)
(1/4H)
(1/4H)
(1/4V)
→
→→
→cons ecut ive 3
→
→→
→cons ecut ive 3
→
→→
→cons ecut ive 4

No. 51957
GM-P421U
GM-P420UG
8
PRECAUTIONS FOR USE
1. Safety precaution for PDP operation
( 1) D o no t pr eve nt th e r ad ia tion of h eat f r om b ack, t op an d f l ank
sides of a PDP . ( Refe r to "5 . Req ui rem en ts f or sett in g".)
Pr eve nti n g th e r a diat io n o f h eat from e ach sid e c aus es hi g h
te mp er atu r e wi thin a P D P a nd m ay d am ag e t he in ner c ir cuit.
( 2) Ins tall a P D P i n a p lace wh ere is wel l ven tilated .
Am bie nt t em per a tur e s ho uld b e wi th in a r ang e of 0～
～～
～40 ℃
℃℃
℃.
( 3) Actio ns wh en the pi ctu re d is app ea re d on the screen
( Vert ic al Install at ion )
W hen th e t em perat ur e i n sid e of a PDP bec am e h ig h d u e t o
stoppage of the cooling fan, the detection circuit for
susp ens ion of fan o pe ra ti on st art s t o f unc tion an d turns th e
power OFF automatically. In this case, unplug the power c ord
immediately.
Refer to“Self check”portion for detail.
( 4) Ins tall in n ot dust y plac e. If du st co vers th e a ir i n take ho les,
inside ventilation effect will reduce. Then, it may damage the
inn er circu it .
If the unit uses in such atmosphere, it will strongly require
r egu lar cl ean ing or m ain ten an ce.
2. Precautions on Installation
To get go od h eat d issip at ion f ro m th e r ear.
This M on it or i s n ot eq ui pp ed wi th co oli ng f an s bec aus e it is
d esigne d to ope ra te qu ie tl y.
If you install the Monitor in s uch a way as not instructed,
ad dition al m et hod s a re r equ ir ed t o c ool d ow n the M onit or.
A : Horizont al Installation (Normal)
In the case, the slots and openings in
the cabinet protect the Monitor from
overheating.
＊See also “Installation” on page 9 in
the instructions.
B : Vertical Installation
It is required to attach the Cooling Fan Unit (TS-C01FANG:notsupplied).
＊See also “Connecting” the C ooling F an Unit (not supplied)” on page
13 in the instructions.
C : Other Installation
Wheninstalling the Monitor in a way not
mentioned in A and B above, consult
your dealer.
Improper installation which obstructs
the air stream may cause internal heat
buildup, and thus may caucus damage
to the product.
3. Retained-Image and burning
When the s ame pattern is displayed co ntinuously for many hours,
th e b urni ng of th e scr e en i s occu rr e d in the sa me ma nn er as for a
CRT . This will shorten the service life of a PDP. In order to avoid
th e b urni ng of t he scr een , tur n t he di spl a y off wh en n ot nec essar y.
Al so tak e s uch ot her me asu re s as scro lling t he scr een and using
a scree n s aver. In ad di tion , pe riod ic al ly di splay t he br ig ht ness
reversal, the reversal to the complementary color or the insertion
of an ima ted i mag e - all th ese will ma ke the d is pl ay on th e s cr een
un if or m. Sinc e th e hi g her br ig htn ess m ay ca use t he bu rn in g,
us ers ar e r eq ue sted to use ne ut ra l color s as mu ch as p ossibl e.
An ima ted i ma ge w il l n ot c aus e th e b ur nin g.
W hen t he scree n is switch ed af ter con ti nu ous d i splay, t he
r eta in ed -im ag e m ay be si gn ifi cant b eca use t he br igh tn ess of a
certain p or ti on bec om es high er th an th at of oth er p or ti on s. T his is
cau sed b y a p hen omen on in which a surf ace electr ical discharge
of t he li g hte d por t io n i s mo re act iva ted t han th e n on- light ed
p ort ions, re sul ti ng i n high er br igh tn ess.
This unit has functio ns such a s “PIXEL SHIFT”, “COLOR-
REVE RS E” and “ REFRESH”. The y will redu ce b urning . P leas e
r efe r t o t he in str uctio n b oo k fo r det ai l.
4. Infrared rays
Be caus e th e ne ar inf rare d r ays ( 80 0～10 00 nm) ra diat e fr o m t he
p ane l f ace, th e ne ighb or ing i nfr are d r ay r emote c ontr o ll e rs,
infrared communication systems, etc. may malfunct ion. In thes e
cases, t ake a meas ure to pre ven t the trou ble to be cau sed b y
dir ect r ays ( o r r efl ect ed r ays) f r om th e scr een b y ch ang ing t he
dir ecti o n of th e scr een fa ce o r kee ping a saf e d ist anc e b et we en a
PD P and ot he r d e vi ces .
Example
Front side

No. 51957
GM-P421U
GM-P420UG
9
5. Requirements for setting
The fo llow ing m ini mu m spac e must be ke pt wh en a P DP is i nst al led.
( The r ec om me nd ed di sta nce sho ul d be fr om th e most pr oject ed po rt io n wh en a PDP is inc li ne d. )
M eth ods of
Ins tallation Front Fl ank Remarks
①
①①
① Hanging from
a wall
[Horizontal]
②
②②
② Hanging from
a wall
[Vertical]
③
③③
③ Suspe nsio n
from a cei ling
・An exclus ive fixture
( opt ion) sh ou ld be us ed.
・
The structure and
strength of th e wall
where a PDP is installed
sh ould be chec ked
beforehan d s o as to
install the PDP s afely
wi t hou t any accide nt.
・
It is necessary to set
the cooling fan when
instal l “
““
“Vertic ally”.
Refer to Precautions
f or use se ct io n 2.
④
④④
④ Desktop
・
A PDP s hou ld be
insta ll e d on a ri gid f loor
or st and .
・In orde r t o pr even t a
PD P f r om turn in g over
b y an acci d ent or
ea rt hq uake , saf et y
m easu r es sh oul d b e
considered.
10 cm 10 cm
10 cm
20 cm
Wall
10cm
10 cm10 cm
15 cm
Wall
10 cm
5cm
Fr ont Wall
5cm
Wall
10cm
10 cm10 cm
15 cm
Wall
10 cm
5cm
Wall
10cm
10 cm10 cm
15 cm
Wall
10 cm
5cm
Wall
Fr ont
Fr ont

No. 51957
GM-P421U
GM-P420UG
10
6. Optical filter (Front filter)
(1) Don't exp ose t he op tica l filter directly to t he sun for a lon g
period of time.
Exp osing d ire ctly t o th e su n f or a lo ng per iod of time m ay
ch ang e the spe cial p r op erty of t he op tica l filte r, r esu lt i ng i n a
ch ang e of co lo r.
( 2) D on' t w ip e th e op tical f ilt er w ith so lv ents suc h as b enze ne ,
thi n ne r, etc.
W ipi ng t he optica l f ilt er with solven ts suc h as b enze ne , th i nn er,
etc . m ay cau se c ha nge in qu al ity and p eel of f th e coas ti ng o n
th e su rf ace.
Lig htly wipe the optical filter with a s oft cloth wit h less f luffy
(e.g. p ure f lannel).
Be caus e th e sur fac e of th e o ptica l fi lter is fr agile, do n't scru b
or h it i t with a h ar d m at er ial .
7. Other p recaut io ns
( 1) Bri ght nes s cha ng e i n the scree n
In or de r t o save t he p ower c onsu mption , th e po we r is
con tr oll ed ( wi th A PS fu nction ) d ep end in g on th e br igh tnes s of
th e screen . Fo r th is, th e bri ght ness m ay ch an ge af te r a sh or t
ti me wh en t he p ictu r e of t he scr een is ch an ged . Ho we ver , thi s
ph en om en on is not a tr oub le.
(2) Component input setting
The c om pon en t sig n al s 1 08 0i an d 10 35 i are th e s am e
fr eq ue ncies. So , t he u ni t do es not d et ect th e sig na ls
automatically.
In this c ase, s et required s ig na l by “HD SIG NAL MODE” in the
set up menu.
8. Precaution during transportation
●W hen a PDP set is d eli vered , th e PDP bod y i ns id e of th e box
will be subject to constant of gravitation under the rough
h and li n g (t hr owi ng , d r op ping , etc .) e ven th ou gh a rig id b o x is
us ed.
In such a case, the PDP may be damaged during
tr ans por t ation . In or der t o avo id an acci de nt du ri n g
tr ans port ation , c are must be t aken t o selec t a reliable car r ier.
On ce a r eliabl e car ri er is se lected , advise the m h ow to h and l e
a PDP p r op erly d urin g tr an sp or tat io n. In add i tion, a PD P
sh ould be insur ed f or it s ph ysical d am age b efo re sh ip me nt .
This p r odu ct is fr ag il e b ecau se gl ass is w ide l y use d. T hus th e
fol lo win g r eq uir emen ts fo r transp or ta tion sho uld be obs erved.
( 1) D on' t app l y vibr ati o n a nd i mp act.
The glass of a P DP may be bro ken wh en t he pac kag e is
br ou gh t d ow n on its side . W h en carr yi n g th e p acka ge, it mu st
alw ays be h an dled wit h two p er son s w it h du e c are n ot to app l y
vibr ati o n a nd i mp act on th e p ackag e.
(2) Don't lay a PDP on its side.
A PDP sh ou ld alw ays be p l aced u prig ht d ur ing b ot h
tr ans por t ation a nd saf eke epi n g. D on 't l ay it o n i ts sid e. Th e
p ane l of a P DP is very fr ag il e t o t he i mpa ct in th e h or izont al
dir ecti o n.
W hen a car c arri es a P DP , load it o n boa rd the ca r in para l le l
with the moving direction of the car. Don't lay several PDPs
on e on t op an oth er.
Dur ing s afe keep ing , d on 't la y m ore t ha n t w o P DP s on e on top
an oth er e ven if th ey a r e kep t u pri gh t.
9. Precaution during changing of armor parts
(rear cover, front panel and optical (front) filter)
●Extreme care must be ex er cis ed f or a PDP whe n t he armor
p arts ar e ch an ge d. To dr op a PD P i s out o f qu estion . Sp ecial
att ent ion sho uld be p aid not t o app ly press ure on the g lass
surfac e during t he wor k. Don 't to uch t he p an el su rf ace in a ny
way.
W hen ch ang in g t he ar mor pa rt s (re ar co ve r, front p ane l an d
op ti cal (f r ont) fi lter) , pl ac e th e pa nel ( PDP sid e) upsi d e d ow n
in p ri n cip le. At thi s ti me , a su it able mat m ust be use d s o as t o
prevent the front side from damaging. However, excessively
sof t mat erial (e .g. blanket) should n ot be us ed for th is purpose
in an y w ay. I f a b lan ket i s u sed , th e su rf ace of a PD P i s
pr essu r ize d b y th e bl an ket wh en placi n g t he pa nel u psid e
d own. U n der su ch a co nditio n, the PDP ma y b e bro ken d ur ing
the work.

No. 51957
GM-P421U
GM-P420UG
11
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
•CAUTION
Be sur e t o disconnect t he p ower c ord f r om th e AC out le t bef or e
disass em bly and r easse mbl y. U se car e sinc e unle ss the po we r
cord is disconnec ted, some parts may still be live even when the
power switch is off.
[1] REMOVING THE BAC K COVER
1. U np lu g t he po we r c or d.
2. R emove th e 11 screws marked !
!!
!as s how n in Fig.1 .
3. R emove th e 4screws marked "
""
"as s hown in Fig. 1.
4. Slight l y rai se t he bo th sid es of th e R EAR C O VER b y h an d
from the PDP UNIT.
[2] REMOVING THE SIDE COVER (L&R)
＊Af ter removing the back c over.
1. R emove th e 8screws marked !
!!
!as s hown in Fig. 2.
2. Remove a screw marked "
""
"as s hown in Fig. 2
3. R emove th e 4screws marked #
##
#as sh ow n i n Fi g.2 . An d
th an t ake off th e c over.
4. W ithdra w t he SIDE CO VER towa rd you.
5. F ollow the same ste ps w he n r em ovi ng the oth er han d S IDE
COVE R as sh own in Fi g.2 .
[3] REMOVING THE TERMINAL BRACKET (L&R)
＊Af ter removing the back c over and side cover.
1. R emove th e 3screws marked !
!!
!as s hown in Fig. 3.
2. R emove th e 2screws marked "
""
"& #
##
#as s hown in Fig. 3.
3. R emove th e 4 retainers marked $
$$
$as s hown in Fig. 3.
4. R emove th e 12 screws marked %
%%
%as s how n in Fig.3 .
5. R emove th e 2screws marked &
&&
&as s hown in Fig. 3.
6. Withdrawthe TERMINAL BRACKET (L&R) towa rd you.
Fig.1
PDP UNIT
SI DE COVER (L)
SI DE COVER (R)
A
(×
××
×11 )
BACK COVER
B
(×
××
×4)
Fig.3
F
(×
××
×2)
F
(×
××
×2)
E(×
××
×12 )
D
(×
××
×4)
C
(×
××
×2)
B
(×
××
×2)
A
(×
××
×3)
PDP UNIT
TERMINAL
BRACKET
(
R
)
POWER
KN
O
B
TERMINAL
BRACKET
(
L
)
Fig.2
A
(×
××
×8)
B
(×
××
×1)
C
(×
××
×4)
A
(×
××
×8)
B
(×
××
×1)
SI DE COVER (L)SI DE COVER (R)
TERMINAL
BR A
C
KET
(
L
)
SP TERMINAL
CO
VE R
PDP UNIT TERMINAL
BR A
C
KET
(
R
)
COVER

No. 51957
GM-P421U
GM-P420UG
12
[4] REMOVING THE SP TERMINAL COVER
&SHIELD COVER
＊Af ter removing the back c over, side cover & t erminal brack et.
1. R emove th e 4 screws marked !
!!
!as s hown in Fig. 4.
2. R emove th e 4screws marked "
""
"fr om th e sp t er min al a s
shown in Fig.4.
3. R emove th e 4 screws marked #
##
#as s hown in Fig. 4.
4. With the SP TERMINAL COVER, SP TERMINAL and
SHIELD COVER toward you.
[5] REMOVING THE BAC K FRAME (L&R)
＊Af ter removing the back c over, side cover & t erminal brack et.
1. R emove th e 2 screws marked !
!!
!, "
""
"& #
##
#as sh own in Fig. 5.
2. R emove th e 5screws marked $
$$
$as s hown in Fig. 5.
3. W i thdr a w t he BACK FR A ME (L o r R) t ow ard yo u.
＊Foll ow the sa me st eps wh en re mo vin g th e oth er h and
BA CK FRAME.
[6] REMOVING THE CHASSIS BASE
＊After removing the back cover, side cover, terminal bracket
& b ack f r am e ( L/R) .
1. R emove th e 2 screws marked !'
!'!'
!'as sh ow n in Fig.6 .
2. Withdra w the CHA SIS BASE toward you.
Fig.5
A
(×
××
×2) D
(×
××
×5)
BACK FRAME
(
L
)
B
(×
××
×2)
POWER
S
W
FRONT PANEL
(×
××
×2)
A
C
(×
××
×2)
B
(×
××
×2)
D
(×
××
×5)
C
(×
××
×2)
BACK FRAME
(
R
)
TOP
FRONT
Fig.6
A
(×
××
×2)
SP AC ER
POW ER S W
CHAS SIS BASE
(×
××
×5)
(×
××
×5)
SP AC ER
FRONT PANEL
AS S
’
Y
TOP
PDP BLOCK
Fig.4
A
(×
××
×4)
C
(×
××
×4)
SP TERMINAL
CO
VE R
POWER
S
W
VI DE O INPUT
PWB
RGB INPUT
PWB
B
(×
××
×4)
SHIELD COVER
SP TERMINAL

No. 51957
GM-P421U
GM-P420UG
13
[7] REMOVING TH E PDP BLOC K
＊After removing the chassis base.
1. R emove th e 4 screws marked !'
!'!'
!'as sh ow n in Fig.7 .
2. Withdrawthe PDP BLOCK towardyou.
＊Replacement of the PDP BLOCK shouldbe performed by2 or
more persons.
CAUTION : Do not dama ge the gas inlet！
！！
！
If the gas inl et is damage d, the PDP UNIT must be re pl aced.
So extreme care should be taken not to dam age the gas
inlet when you remov e the PDP UNIT.
[8] REMOVING TH E OPT IC AL FILTER
＊Af ter removing the PDP BLO CK .
1. R emove th e 3 screws marked !'
!'!'
!'as sh ow n in Fig.8 .
2. R emove th e 2 screws marked "'
"'"'
"'attaching the CONTROL
PA NE L as sho wn in Fig .8.
3. W i thdr a w t he OPTICAL F IL TER w it h f l ame to war d yo u.
[9] REMOVING THE PW BOARD
＊Af ter r emovi ng th e optica l fi lt er .
!FRONT CONTROL PWB
1. R emove th e 2 screws marked #'
#'#'
#'as sh ow n in Fig.8 .
2. Remove the FRONT CONTROL PWB from CONTROL
PA NE L.
!LE D PWB
1. Rem ove th e 2 screws marked $'
$'$'
$'as sh ow n in Fig.8 .
2. The n r emo ve th e LED PWB fr om opt ic al pa ne l.
WIRE CLAMPING AND CABLE T YING
1. Be sure t o clamp the wire.
2. N ever r emo ve th e c abl e ti e use d f or tying th e wi re s to ge the r.
Sh oul d it be in ad ver te ntly r em ove d, b e su re to t i e th e wi res
with a new cable tie.
Fig.7
A
(×
××
×4)
PDP BLOCK
FRONT PANEL
AS S
’
Y
TOP
OPTICAL
FILTER
GAS I NLET
Fig.8
D
(×
××
×2)
LED PWB
FRONT PANEL
A
SS
’Y
OPTICAL
FILTER
(×
××
×2)
B
(×
××
×3)
A
C ONT RO L
PANEL
C ONT RO L
PWB
(×
××
×2)
C

No. 51957
GM-P421U
GM-P420UG
14
REPLACEMENT OF MEMORY ICs
1. MEMORY IC
This model uses memory IC. In the memory IC is memorized data for
corr ectl y o pe ra ting th e vi d eo-chr o ma a nd def l ectio n circui ts.
When replacing the memory IC, be sure t o use IC writ ten with the in it ia l
valu es of d ata .
2. PROCEDURE FOR REPLACING MEMORY IC
(1) Power off
Sw itch the p ow er of f an d un plug th e pow e r pl u g fr o m t he w all ou tlet.
(2) Repla ce IC
Be sure to use memory IC written with the initial data values.
(3) Power on
Con nect th e p ower p lu g into th e wa ll o utle t an d tu rn t he pow e r on.
3. PROCEDURE FOR SET-UP MENU
(1) Press the MENU / EX IT ke y an d t he VOL UME- key simultaneously.
(2) The SET-UP MENU screen (Fig. 1) will be displayed.
( 3) C heck th e se tting valu e of th e SE T-UP MENU t ab l e.
(4) If the value is different, select the setting item with the SE LECT
(▲/▼) key, and set the correct value with t he ADJUST ( / ) key.
(5) Press the MENU / E XIT ke y, an d ret ur n to t he no rm al s creen.
4. PROCEDURE FOR reset OR all reset
(1) The SET-UP MENU is displayed.
(2) Select “re set” or “all reset” item with SELECT (▲/▼) keyof
remote control unit.
(3) Press ENTER ( ) key, and the “re set” (or allreset) menu is
displayed (Fig. 2).
(4) Press ENTER ( ) key, data will be initilized.
"W hen "r eset" i s set up , th e s etti ng val u e of th e SE T-UP M EN U w il l be
initialized.
"When "all res et" is set up, the po wer is turne d off f or a while an d on
automatically again. T hen every setting value will be returned to
th ose at f act or y shi pmen t.
When select the [reset or all reset],
change to [ENTER : ] mode.
Fig. 1
Fig. 2
or < reset >
REMOTE CONTROL UNIT KEY ASSIGNMENT
VIDEO A KEY
AS PECT KE Y
DISPL A Y KE
Y
MUTING KEY
VIDEO B KEY
ME NU / EXIT
KE Y
COMP O./ RG B B
KE Y
POW E R KEY
RGB A KE Y
VOL UME
- / + KEY
ENTER K E
Y
SE LECT ( ▲/▼)
KE Y
ADJUST ( / )
KE Y
REMOTE CONNECTOR

No. 51957
GM-P421U
GM-P420UG
15
5. PROCEDURE FOR SERVICE MENU
(1) ADJUSTMENT ITEM OF S ERVICE MENU
W ith th e SER VI CE ME NU, var iou s set ting s can b e ma de, an d t he y ar e
br oa dly class if ie d in th e f ollo win g i t ems of ad ju stm ent s.
S････(SIGNAL BLOCK) E････ (ENHANCER BLOCK)
W･･･(W HITE BAL ANCE ) B ････ (PRIMING /CODING BL OCK)
D････(SIZE/ V POS ITIO N B LOC K ) I ････ ( DE VICE INI TIAL VA LUE)
C････(CPU BLOCK) P････ (H POSIT ION BL OCK)
(2) SE RV ICE M ENU
1) HOW TO ENTER THE SE RVICE M E NU
①
Press MENUke y an d S ELE CT ( ▲) key s im u lt ane ous ly (Fig. 1) .
②
The “"” mar k is ap pe ar s a t th e c ent er of the scree n (Fi g. 2) .
③While "m ar k is ap pea rs , press th e MENU key and VOL- key
simultaneously.
④The word “PLEASE DON’T TOUCH！” (Fig. 3) will be display on the
screen center.
⑤
While the words of “PLEASE DON ’T TOUCH ！” ar e displ a y as
shown in Fig. 3.
⑥Press the SELECT ( ) key, SERVICE MENU will be display as
shown in Fig. 4.
2) SE LE CT & AD J US TM ENT OF SER V I C E M EN U IT EM
＊While the SERVICE MENU is displayed.
①
Press the up ( ▲)or down ( ▼) select key to white balance block
item.
②After selec ting the item, press ENT ER ( ) key.
③The adjustment menu mode is displayed.
④Press the LEFT ( ) or RIGHT ( ) ADJUST key to change the
set ting val u e.
⑤Press MENU / EXIT key to display the original menu.
⑥Pe rf orm in th e s am e man ner f or ot hers S ERVICE ME NU I TEM.
Fig. 1
Fig. 2
Fig. 3
Fig. 4

No. 51957
GM-P421U
GM-P420UG
16
INITIAL SETTING CONTENTS / RANGE OF THE SET-UP MENU
Setting Item Setting content / Range Initial Setting
CONTROLLOCK ON OFF OFF
STATUSDISPLAY ON OFF ON
REMOT E SWITCH1 MODE1 MODE2 MODE3 MODE4
MODE6 MODE5 MO DE 1
HD SIGNAL MODE 1080i 1035i 1080i
PIXELSHIFT ON OFF OFF
POWERSAVE ON OFF OFF
COLOR-REVERSE ON OFF OFF
REFRESH ON OFF OFF
LAST MEMORY FOR SHIPMENT
Setting Item Settin
g
Value Setting Item Settin
g
Value
POW ER OFF STA TUS DISPL AY ON
INPUT SEL ECT VIDEO A/B CONTROL LOCK OFF
VOL UME 10 REMO TE SW ITCH MO DE 1
CONTRAST 10 HD SIGNAL MODE 1080i
BRIGHT 00 WHITE BALNCE HIGH R GAIN 0
CHROMA 00 G GAIN 0
PHAS E 00 B G AIN MA X
PICTURE ADJ .
SHARPNESS 00 LOW R GAIN MA X
H SIZE 00 G G AIN 0
H POSITI ON 00 B G AIN 0
V S IZE 00 PIXE L SHIFT OFF
V P OSITION 00 POWER SAV E OFF
SIZE/ POSITION
ADJ.
CLOCK PHASE
(RG B only) 00 COLOR-REVERSE OFF
COLOR TEMP HIGHT REFRESH OFF
PICTURE MODE
(RG B only) STIL L MODEL NAME Set model No.
AS PECT REGUTAR
SIG NA L MO DE AUTO
MA IN
ME NU
FUNCTION
SE LECT
RGB / COMP. COMP.
SE TUP
ME NU

No. 51957
GM-P421U
GM-P420UG
17
■INITIALIZATION OF SELF-DIAGNOSIS
＜
＜＜
＜FOR CHECKING THE DIAGNOSIS HISTORY＞
＞＞
＞
1. En ter th e SER VIC E ME NU as sh ow n Fi g . 1 .
2. Display the second page by pressing the SELECT : ▲key or
▼key (Fig. 2) .
3. Af ter mo vi ng th e cur sor to DIA GNOSI S, di sp lay DIAGNOS IS
BLOCK (Fig. 3) by p ressing the ENTER : key.
4. C onf irm th at ever y ite m is in dicat ed by a ○
○○
○mark.
5. If an y it em i s ind ic ate d by a ×
××
×mark, press the key to display
as s hown in Fig. 4.
6. W hen th e ENT ER : key is p r essed a ga i n, eac h it em w il l b e
indicated by a ○
○○
○mark (Fig. 5) .
7. Self-diagnosis will be initialized.
＜
＜＜
＜SELF CHECK BY LED＞
＞＞
＞
"This plasma display monitor is equipped with a self-diagnosis function by the LED indication.
"If an abnormality is detected, the three LED indicators on the upper left of the PDP will tur n on or fl ash.
SELF-D IAG NOSIS ITEM S & L ED LIGHT ING / FLA SHI NG
LED
Detected i tems u
pp
er center lower Priority
E2PROM communication
err or ○○☆ 6
Panel alarm ☆☆○ 5
Hi gh temp. ( Power ) ☆○○ 4
Hi
g
h t em
p
.
(
Tem
p
. sens or
)
A ☆○☆ 3
Hi
g
h t em
p
.
(
Tem
p
. sens or
)
B ☆☆○ 2
Flash write abnormality ☆☆☆ 1
Note:
・displayed color: RED
・flashing interval : 0.25s ON, 0.25s OFF
・LEDs indicate just 1 detected item that has priority even
detected more than 2 items to avoid any confusion.
・All LEDs ar e lightin g when Flash memory writing.
☆
☆☆
☆: Flashin g LE D / ○
○○
○: L ightin g LED
Fig. 1 Fig. 2
Fig. 3
Fig. 4
Fig. 5

No. 51957
GM-P421U
GM-P420UG
18
■INITIALIZATION OF ELAPSED TIME
1. Enter the SERVICE ME NU (Fig. 1) .
2. D isp lay th e sec ond pa ge by pr ess in g th e SE LEC T : ▲key and
▼key.
3. Af ter movin g th e cursor to HOUR METE R BLOCK (Fig. 2), press
the ENTER : key.
4. Then the elapsed time will be as shown Fig. 3.
5. Press the ENTER : key t o display as shown in Fig. 4.
6. W hen the ENT ER : k ey is p res sed ag ai n, th e e la psed ti me
will be returned to “000000” (Fig. 5).
Fig. 1 Fig. 2
Fig. 3
Fig. 4
Fig. 5

No. 51957
GM-P421U
GM-P420UG
19
INITIAL SETTING VALUE OF THE SERVICE MENU
WHITE BALANCE BLOCK
SETTING
No
SETTING
VALE
SETTING
No
SETTING
VALE
RGB PC HIGH COMPO. H IGH
DRIVE (R) W(A01) 245 DRIVE (R) W(G01) 238
DRIVE (G) W(A02) 254 DRIVE (G) W(G02) 255
DRIVE (B) W(A03) 255 DRIVE (B) W(G03) 255
CUT OFF (R) W(A04) 000 CUT OFF (R) W(G04) 000
CUT OFF (G) W(A05) 000 CUT OFF (G) W(G05) 000
CUT OFF (B) W(A06) -001 CUT OFF (B) W(G06) 000
B R IG H T W (A 0 7 ) - 0 03 B R IG H T W (G 0 7) - 0 04
AD GAIN (R) W(A08) 128 AD GAIN (Pr) W(G08) 128
AD GAIN (G) W(A09) 128 AD GAIN (Y) W(G09) 128
AD GAIN (B) W(A10) 128 AD GAIN (Pb) W(G10) 128
AD OFFSET (R) W(A11) 000 AD OFFSET (Pr) W(G11) -002
AD OFFSET (G) W(A12) 000 AD OFFSET (Y) W(G12) 000
AD OFFSET (B) W(A13) 000 AD OFFSET (Pb) W(G13) -002
RGB P C LOW COMPO . L OW
DRIVE (R) W(B01) 255 DRIVE (R) W(H01) 255
DRIVE (G) W(B02) 249 DRIVE (G) W(H02) 255
DRIVE (B) W(B03) 206 DRIVE (B) W(H03) 225
CUT OFF (R) W(B04) 000 CUT OFF (R) W(H04) 000
CUT OFF (G) W(B05) 000 CUT OFF (G) W(H05) 000
CUT OFF (B) W(B06) 000 CUT OFF (B) W(H06) 000
BRIGHT W(B07) 000 BRIGHT W(H07) 000
AD GAIN (R) W(B08) 000 AD GAIN (Pr) W(H08) 000
AD GAIN (G) W(B09) 000 AD GAIN (Y) W(H09) 000
AD GAIN (B) W(B10) 000 AD GAIN (Pb) W(H10) 000
AD OFFSET (R) W(B11) 000 AD OFFSET (Pr) W(H11) 000
AD OFFSET (G) W(B12) 000 AD OFFSET (Y) W(H12) 000
AD OFFSET (B) W(B13) 000 AD OFFSET (Pb) W(H13) 000
VIDEO HIGH RGB 15k HIGH
DRIVE (R) W(C01) 239 DRIVE (R) W(I01) 250
DRIVE (G) W(C02) 255 DRIVE (G) W(I02) 254
DRIVE (B) W(C03) 255 DRIVE (B) W(I03) 255
CUT OFF (R) W(C04) 000 CUT OFF (R) W(I04) -001
CUT OFF (G) W(C05) 000 CUT OFF (G) W(I05) 000
CUT OFF (B) W(C06) 000 CUT OFF (B) W(I06) 000
BRIGHT W(C07) -012 BRIGHT W(I07) -001
VIDEO LOW AD G AIN
(
R
)
W
(
I08
)
128
DRIVE (R) W(D01) 255 AD GAIN (G) W(I09) 128
DRIVE (G) W(D02) 255 AD GAIN (B) W(I10) 128
DRIVE (B) W(D03) 203 AD OFFSET (R) W(I11) 000
CUT OFF (R) W(D04) 000 AD OFFSET (G) W(I12) 000
CUT OFF (G) W(D05) 000 AD OFFSET (B) W(I13) 000
CUT OFF (B) W(D06) 000 RGB 15k LOW
BRIGHT W(D07) 000 DRIVE (R) W(J01) 255
COMPO. 15k HIGH DRIVE
(
G
)
W
(
J02
)
240
DRIVE (R) W(E01) 236 DRIVE (B) W(J03) 198
DRIVE (G) W(E02) 255 CUT OFF (R ) W(J04) 000
DRIVE (B) W(E03) 253 CUT OFF (G) W(J05) 000
CUT OFF (R ) W(E04) 000 CUT OFF (B) W(J06) 000
CUT OFF (G) W(E05) 000 BRIGHT W(J07) 000
CUT OFF (B) W(E06) 000 AD GAIN (R) W(J08) 000
BRIGHT W(E07) -013 AD GAIN (G) W(J09) 000
COMPO. 15k LOW AD G AIN
(
B
)
W
(
J10
)
000
DRIVE (R) W(F01) 255 AD OFF SET (R) W(J11) 000
DRIVE (G) W(F 02) 255 AD OFFSET (G) W(J12) 000
DRIVE
(
B
)
W
(
F03
)
204 AD OFFSET
(
B
)
W
(
J13
)
000
CU T O F F (R ) W (F 04 ) 0 00
CU T O F F (G ) W (F 05 ) 0 00
CU T O F F (B ) W (F 06 ) 0 00
BRIGHT W
(
F07
)
000
SETTING ITEM SETTING ITEM

No. 51957
GM-P421U
GM-P420UG
20
CPU BLOCK
SETTING
N
o
SETTING
VALE
SETTING
N
o
SETTING
VALE
PANORAM A DATA reserved C(C26) 000
INP UT PI XE LS C
(
A01
)
000 HORI POS MIN C
(
C27
)
-100
OUTPUT PIXELS C
(
A02
)
000 HORI POS MAX C
(
C28
)
000
NL ST AR T C
(
A03
)
000 VERT POS MIN C
(
C29
)
-255
NL END C(A04) 000 VERT POS MAX C(C30) 000
RATIO CENTER C
(
A05
)
000 HORI WIDE LOW C
(
C31
)
-255
RATIO SIDES C
(
A06
)
0 00 HO RI W ID E UP C
(
C32
)
000
reserved C
(
A07
)
000 reserved C
(
C33
)
-255
reserved C
(
A08
)
000 reserved C
(
C34
)
000
reserved C(A09) 000 HORI MIN C(C35) -255
reserved C
(
A10
)
000 HORI MAX C
(
C36
)
000
SIGNAL RANGE VE RT M IN C
(
C37
)
-255
CONTRAST MIN C
(
B01
)
-039 VERT MAX C
(
C38
)
000
CONTRAST MAX C
(
B02
)
-038 HORI W ID E LOW C
(
C39
)
-255
BR IGHT MIN C(B03) -020 HO RI W ID E UP C(C40) 000
BR IG HT MA X C
(
B04
)
+020 reserved C
(
C41
)
-255
CROMA MIN C
(
B05
)
-064 reserved C
(
C42
)
000
CROMA MAX C
(
B06
)
+08 0 DO W N SCA L E I N C
(
C43
)
-255
PHASE MIN C(B07) -128 I/O T IME 1 C(C44) 000
PH AS E MAX C
(
B08
)
-128 I/ O T IME 2 C
(
C45
)
-255
V BR I G A IN CO MP C
(
B09
)
-128 HORI SIZE OFFSET C
(
C46
)
000
G BRI GAIN COMP C
(
B10
)
-12 8 VE RT SI ZE OF FSE T C
(
C47
)
-255
R G A IN MI N C
(
B11
)
000 HORI SIZE OFFSET C
(
C48
)
000
R GAIN MAX C(B12) +127 VERT SIZE OFFSET C(C49) -255
G GAIN MIN C
(
B13
)
000 DHSYNC CYCLE C
(
C50
)
000
G GAIN MAX C
(
B14
)
+127 DHSYNC CYCLE C
(
C51
)
-255
B GAIN MIN C
(
B15
)
0 00 DIN OV E RERI TE C
(
C52
)
000
B GAIN MAX C
(
B16
)
+127 FREQENCY DATA
SI ZE /P OS I. RANG E HORI F REQ ERROR C
(
D01
)
003
HORI MIN C
(
C01
)
-080 VERT FREQ ERROR C
(
D02
)
001
HORI MAX C
(
C02
)
080 STATUS DELAY C
(
D03
)
050
VE RT M IN C
(
C03
)
-03 0 SI GN AL DE TE CT C
(
D04
)
010
VE RT M AX C
(
C04
)
020 SIGNAL W AIT TIM C
(
D05
)
050
CLK PHASE MIN C
(
C05
)
-02 0 SI GN AL W AI T T IM C
(
D06
)
000
CLK PHASE MAX C
(
C06
)
020 SYSTEM CONSTANT
HORI W ID E LOW C
(
C07
)
-01 0 AR EA C
(
E01
)
001
HORI W ID E UP C
(
C08
)
010 POW ER ON DE LAY C
(
E02
)
000
reserved C
(
C09
)
-010 POW ER ON DELAY C
(
E03
)
000
reserved C
(
C10
)
010 MOD EL No C
(
E04
)
000
HORI POS MIN C
(
C11
)
-255 C
(
E05
)
000
HORI POS MAX C
(
C12
)
001 C
(
E06
)
000
VE RT PO S MIN C
(
C13
)
-100 C
(
E07
)
000
VE RT PO S MA X C
(
C14
)
000 C
(
E08
)
000
HORI W ID E LOW C
(
C15
)
-100 C
(
E09
)
000
HORI W ID E UP C
(
C16
)
000 C
(
E10
)
000
reserved C
(
C17
)
-100
reserved C
(
C18
)
000
HORI POS MIN C
(
C19
)
-100
HORI POS MAX C
(
C20
)
000
VE RT PO S MIN C
(
C21
)
-100
VE RT PO S MA X C
(
C22
)
000
HORI W ID E LOW C
(
C23
)
-100
HORI W ID E UP C
(
C24
)
000
reserved C
(
C25
)
-100
SETTING ITEM SETTINNG ITEM