Sony Triniton GDM-20SHT User manual

GDM·20SHT
SERVICE MANUAL
Chassis No. SCC-H71A-A
Multiscan 20sh
•••••
•••••
•••
MICROFILM
SPECIFICATIONS
Picture tube 0.25 mm aperture grille pitch
20 inches measured diagonally
(19" visual)
90-degree denection
Effective picture size Approx. 384 x 290 mm (w /h)
(15 1ft x 11 In inches)
Display picture size Approx. 373 x 280
mm (w /h)
(14 y, x 11 1;" inches)
Resolution
or
Approx. 350 x 280 mm (w /h)
(13 %x 11 1,1" inches)
Horizontal: 640- to 1600 dots (-VGA
mode)
Vertical: 480- to 1200 lines (-VGA
mode)
Deflection frequency Horizontal: 30 to 107 kHz
Vertical: 50 to 160 Hz
Input signal Sync:
Sync
on Green: 0.286 Vp·p, Negative
H/V Composite Sync: 75 ohms/2
kohms, TIL Positive/Negative
H. Sync/V. Sync Separate: 75 ohms/
2 kohms, TIL Positive/Negative
Video:
R/G/B: 0.714 Vp-p, Positive
AC
input voltage/current
100 to 120 V, 50/60 Hz, max. 2.5 A
200 to 240 V, 50 - 60 Hz, max. 1.2 A
Dimensions Approx.
474 x 474 x 502 mm (w/h/d)
(18 1f. x 18 Yt x 19 Yt inches)
Mass Approx. 31 kg (68 Ib 4 oz)
Supplied ilCc('s5ories AC power cord (1)
15-pin mini D-sub (HD15 -HOtS)
videu cable (1)
Ferrite core (1)
Binder (1)
Design and specifications are subject to change without
notice.
P-5 CHASSIS
For Service Manuals
MAURITRON SERVICES
B Cherry Tree Road, Chlnnor
Oxfordshlre, OX9 4Qy'
Tel [phone]
Fax [phone]
email:[email protected]
TRINITRON® COLOR GRAPHIC DISPLAY
SONY

GDM-20SHT
Power Saving Function
This monitor meets the power saving guidelines set by
TCOn guidelines (NUTEK). It is capable of reduced power
consumption when used with a computer equipped with
Display Power Management Signaling (DPMS). By sensing
the
absence of the sync signal coming from the computer, it
will
reduce the power consumption as follows:
Normal operation
100%
2
Suspend
approx.l0%
(1st step of power saving)
Active-off
3 (2nd
step of power saving)
approx.7%
TIMING SPECIFICATION
Mode 1 2 3
Graphics mode
YGA YESA-75 Macintosh
(Graphics) 16" Color
Resolution (H x V)
640 x 480
800 x 600
832 x 624
Oat Clock 25.17 MHz
49.5 MHz
57.283 MHz
H Frequency
310463 kHz 46.875 kHz 49.725 kHz
HTotal
31.784 ~S 21.333 ~S 20.111 ~
H Front porch 0.318
~S 0.323 ~S 0.559 ~
HSync width
3.814 ~S 1616 ~S 1.117~
H Back porch 1.589
~S 3.232 ~S 3.910 ~S
H Blanking 5.721
~S 5.172 ~S 5.586 ~S
H Active Area 26.063
~
16.162 ~S 14.524 ~S
V Frequency 59.929 Hz
75.000 Hz 74.550
Hz
V Total 525 H Lines
625 H Lines 667 H Lines
Y Front porch 2 H Lines 1 H Line 1 H Line
Y Sync
width
2 H Lines 3 H Lines 3 H Lines
Y Back porch
25 H Lines 21 H Lines 39 H Lines
Y Blanking
29 H Lines 25 H Lines
43 H Lines
Y Active Area 496 H Lines
600 H Lines 624 H Lines
Sync External External External
Sync Polarity H H
(+)
H
Sync Polarity V H
(+)
(-)
Scan Mode
Non- Non- Non-
interlace interlace interlace
1) VGA does not include the border area.
2) Recommended horizontal frequency timings are:
Horizontal front porch
is 0.1 ~sec or more.
Horizontal sync. width is 0.8 ~sec or more.
Horizontal back porth
is 0.6 ~sec or more.
Horizontal blanking width is 2.4 ~sec or more.
CAUTION: The Power Saving function will automatically
put the monitor into the Active-off state if the
power switch is turned on without any video
signal input. Once the horizontal and vertical
syncs are sensed, the monitor will automatically
return to its Normal operation state.
green on off
approx. 3 sec. green on
orange on
approx. 10 sec. off orange
on
4 5 6 7 8
Macintosh Macintosh YESA-75 YESA-75 VESA-80
19"
Color
21" Color
1024 x 768 1152 x 870 1280 x 1024 1600 x 1200 1600 x 1200
80 MHz 100 MHz 135 MHz
202.5 MHz 216 MHz
60.241 kHz 68.681 kHz 79.976 kHz 93.750 kHz 100.00 kHz
16.600 ~
14.560 ~
12.504 ~
10.667 ~S
10.000 ~S
0.550 ~
0.320 ~S
0.119 ~
0.316 ~S 0.296 ~S
1.200 ~
1.280 ~ 1.067 ~S 0.948 ~
0.889 ~
2.050 ~S 1.440~ 1.837 ~S
1.501 ~S 10407 ~S
3.800 ~S 3.040 ~S 3.022~
2.765 ~S
2.593 ~S
12.800 ~S
11.520 ~S 9.481 ~S
7.901 ~S
7.407 ~S
74.927 Hz 75.062 Hz 75.025 Hz
75.000 Hz
80.000 Hz
804 H Lines 915 H Lines 1066 H Lines 1250 H Lines
1250 H Lines
3 H Lines 3 H Lines 1 H Line 1 H Line 1 H Line
3 H Lines 3 H Lines 3 H Lines 3 H Lines 3 H Lines
30 H Lines
39 H Lines
38 H Lines 46 H Lines
46 H Lines
36 H Lines 45 H Lines 42 H Lines
50 H Lines
50 H Lines
768 H Lines 870 H Lines
1024 H Lines
1200 H Lines
1200 H Lines
External External External External External
(-)
H (+)
(+) (+)
(-)
(-)
(+) (+) (+)
Non- Non- Non- Non- Non-
interlace interlace interlace interlace interlace
-2-
9
YESA-85
1600 x 1200
229.5 MHz
106.250 kHz
9.412
~
0.279 ~S
0.837~
1.325 ~S
2.440 ~S
6.972~
85.000 Hz
1250 H Lines
1 H Line
3 H Lines
46 H Lines
50 H Lines
1200 H Lines
External
(+)
(+)
Non-
interlace

GDM-20SHT
SAFETY CHECK-OUT
(US Model only)
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-sol:
dered connections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.
3.
Check that all control knobs, shields, covers, ground straps,
and mounting hardware have been replaced. Be absolutely
certain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly tran-
sistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious
signs of deterioration. Point them out to the customer and
recommend their replacement.
6. Check the line cords for cracks and abrasion. Recommend
the replacement of any such line cord to the customer.
7. Check the B+ and HV to see if they are specified values.
Make sure your instruments are accurate; be suspicious of
your HV meter if sets always have low HV.
8. Check the antenna terminals, metal trim, "metallized"
knobs, screws, and all other exposed metal parts for AC
Leakage. Check leakage as described below.
O.1SIlF
To Exposed Metal
Parts on
Set
1.5 kfl
AC
Voltmeter
(0.75 V)
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 rnA (500 microampers).
Leakage current can be measured by anyone of three methods.
1. A commercial leakage tester, such as the Simpson 229 or
RCA WT-540A. Follow the manufacturers' instructions to
use these instruments.
2. A battery-operated AC milliammeter. The Data Precision
245 digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
YOM or battery-operated AC voltmeter. The "limit" indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are
examples of a passive VOMs that are suitable. Nearly all
battery operated digital multimeters that have a 2 V AC
range are suitable. (See Fig. A)
WARNING!!
NEVER TURN ON THE POWER IN A CONDITION IN
WHICH THE DEGAUSS COIL HAS BEEN REMOVED.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED
BY SHADING AND MARK .&
ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS
AND IN THE PARTS LIST ARE CRITICAL FOR SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT
ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED
IN
THIS MANUAL. FOLLOW THESE PROCEDURES
WHENEVER CRITICAL COMPONENTS ARE REPLACED
OR IMPROPER OPERATION IS SUSPECTED.
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA
BOBINE DE DEMAGNETISATION EST ENLEVEE.
ATIENTION AUX COMPOSANTS RELATIFS A LA
SECURITE!!
-=- Earth Ground LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET
PAR UNE MARQUE .& SUR LES SCHEMAS DE
Fig. A. Using an AC voltmeter to check AC leakage. PRINCIPE, LES VUES EXPLOSEES ET LES LlSTES DE
PIECES SONT D'UNE IMPORTANCE CRITIQUE POUR LA
SECURITE DU FONCTIONNEMENT. NE LES REM-
PLACER QUE PAR DES COMPOSANTS SONY DONT
LE
NUMERO DE PIECE EST INDlQUE DANS LE PRESENT
MANUEL OU DANS DES SUPPLEMENTS PUB LIES PAR
SONY. LES REGLAGES DE CIRCUIT DONT L'IMPOR-
TANCE EST CRITIQUE POUR LA SECURITE DU
FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRESENT MANUEL. SUIVRE CES PROCEDURES LORS . .~
DE CHAQUE REMPLACEMENT DE COMPOSANTS
CRITIQUES, OU LORSQU'UN MAUVAIS FONCTIONNE-
MENT EST SUSPECTE.
-3-

GDM-20SHT
TABLE OF CONTENTS
1. GENERAL ............................................. ·.··· ................. 5
2. DISASSEMBLY
2-1. Rear Cabinet and Top Cover Removal............... 7
2-2. D Block Assy Removal....................................... 7
2-3. Power Block Assy Removal............................... 8
2-4. L Board Removal ................................................ 8
2-5. M Board Removal ............................................... 9
2-6. A Block Assy Removal....................................... 9
2-7. H Board Removal ................................................
10
2-8. Picture Tube Removal......................................... 10
2-9. Wiring Harness Layout .......................................
11
3. SAFETY RELATED ADJUSTMENT ............. 12
4. ADJUSTMENTS ...................................................... 13
5. DIAGRAMS
5-1. Block Diagrams ................................................... 17
5-2. Frame Schematic Diagram .................................. 25
5-3. Circuit Boards Location ...................................... 27
5-4. Schematic Diagrams and Printed Wiring Boards
(1) Schematic Diagrams of D and L Boards ............ 31
(2) Schematic Diagram of DA Board ....................... 35
(3) Schematic Diagram of A Board .......................... 45
(4) Schematic Diagrams
of DB, G, Hand
M Boards ......................................................... 49
5-5. Semiconductors ................................................... 56
6. EXPLODED VIEWS
6-1. Chassis... .............................................................. 57
6-2. Picture Tube ........................................................ 58
6-3. Packing Materials ................................................ 59
7. ELECTRICAL PARTS LIST ............................ 61
-4-

U1
I
The operating Instructions mentioned here are partial abstracts
from the Operating Instruction Manual. The page numbers of
the Operating Instruction Manual remeln as In the manual.
SECTION 1
GENERAL
Function of Controls
See the given pages for further descnption.
Front panel
Rear panel
4 ,
'.
i •.
II II
ill RESET button (page 10)
Resets
the adjustment data to the factory-preset levels
for
the Input Signal being received.
III M01RE button and indicator (page 10)
Eliminates moire.
~ Adjustment parameter buttons and indicators
Select the adjustment parameters. The mdlcator of the
selected parameter lights.
ROTATION: Raster rotation and color distortion
(page 101
COLOR: Color temperature (page 9)
CONY: Convergence (page 9)
SHAPE: Pincushion and keystone distortions (page 9)
SIZE: Picture size (page 9)
CENTER:
Centering (page 8)
[II 0. (brightnes!.) buttons
Adjust the picture bnghtness in normal operation mode
(page 8).
Act
as +/- or % controls to adjust pICture size,
centenng, convergence, rotation, keystone distortion and
coJor temperature (pages 8 - 10).
~ () (contrast) buttons
Adjust the picture contrast in normal operation mode
(page 8).
Act as +/- or ¢fc> controls to adjust picture size,
centering, con\"t:~rgence, beam landing, pincushIOn
distortion, color temperature and moire (pages 8 - 10).
[ID roWEI{ SA VIt\:G indicato( (page II)
Lights up when the mom tor is in Power Saving mode.
Flashes when the limit value for an adju~tment IS
reached. Also fla5he~ If you press the adjustment buttons
on the front panel In the Lock mode.
m t:> power switch and indICator
Turns the momtor on and off. The indicator illuminates
when the monitor IS turned on.
To disconnect
the power completely, unplug the power
cord.
[ID AC IN connector (page 6)
input for the ~upphed AC power cord
(ID Video mput connectors (5 BNC) (page 6)
Accept ReB vldt;O'o and sync :'Ignab
BNC
Input onnntorsl R
_:l~ll3b (@)
SYnc on
l.rl:'"t'n
H/V
Composite
Sync
R<d
Red
G B
(@)
(@)
C0m~t~ I Blue
~yn( nn
Gr ... t'ro
Crt>t:'n I Slut'
HO
(@)
H/V
Cumpo>llt
Svnc
vo
(@)
HjV
s.-p.uale
S~'nc
Red Grt:'l;'n ! Blut' H Sync IV
Sync
llil 8:-JC/O-SUB ;witch (p"ge 6)
Select::. the RGB or O-sub Signal
l __ ~'
[j] Video input connector OS-pin mini D-sub) (page 6)
Accepts D-sub Video and sync signals. To connect this
connector, use the supplied IS-pin mini D-sub cable.
o o
Pm,\iu !
Signal
Signal
Red
N/C
Green
Ground
(Cump..>Slte
Sync on Green)
Slue
Ground
Ground
Bi-Due-ctlonal D.lta
(SDA)'
DOC Ground· !3 H. Sync
Red Ground 14
V. Sync
Green Ground
tS
Data Clock (5CU·
Blue Ground
• DIsplay Data Channd (DOC) Standard by VESA
~ 7S0/2kO SWitch
SWitches
the impedance of the sync input connectors
«(ID, [j]) termindtion to 75 n or 2 kn. ThiS monitor is
Lnltially set to 2 kfl, whICh LS appropn<\te for the majonty
of IBM compatible .md Maclnto!>h systems. For UllIlllH!
systems which may require 75ft ~et' the Oper .. lllng
In~tructions ot your computer.
[j] CONTROL LOCK switch
Locks the montlor so that the buttons, except the power
SWitch, on the front panel cannot be operated (Lock
mode) With this switch, you can ensure that the display
remainS In the optimum condition even when the
mom tor is placed where the control buttons can be
touched by unauthorized persons.
To release the Lock mode, set to OFF
I\!ormally keep this switch set to OFF.
[j1J SERVICE terminal
The term mal is to be used by servICe personnel only.
.,
5

en
I
Connection
You (,In connect this mOnitor to imy IBM or compatible system, Macintosh, and othH various computers. In order to comply
with the mandatory FCC standards, use the supplied Video signal cablt'.
Connecting an IBM or compatible system
CSt' the supplied video Signal cable.
Set to D-SUB.
Toawa~et ~ II 111~ci l·f·':: .. ~1111 III
BNC c=m O·SUB
.........
Power cord (supplied)
To video output
~
Video signal (able (supplied)
Connecting a Macintosh system
Use the supplied video signal cable, and d MaCintosh adapter (not supplied).
Set to D-SUB.
To a wall outlet
+- ~ 1'1 ttrn~IU
Power cord (SUPPlied: I \
Connecting a computer to the BNC connector
Use it BNC video signal cable (not supplied) Set to BNC.
Toawal~t ~ II 1,5.1111 II rBNemlDsuB1
Power cord (supplied)
Computer
I~~Q£JI
To video output
Video signal cable (not supplied)
6 F
~"!
Attaching the ferrite cores
Wht:'n you use a Video signal cable otiWf Ih,1I1 the ~uppllL'J
one, be sure to dtt,Kh the supplied terntl' core ,l~ dlll~trdted
Close the lid.
~
~
Pull the supplied plastic binder tightly.
~
~~
-~-~" 1l-~1
Preset Mode
The Multiscan 205h autoillatically ad!ll~b the J.l~pl<ly ~ize
.lnd POSition to the optimum 1Il J((ordann: \'11th the Input
Signal up to l~ Jltfert:'nt types.
[t has factory-presd adjustment dato for 9 Jlfferent types of
~ignab (preset mode). When a computer or it \ .... orkstation
No. Display Horizontal
(dots x lines)
frequency
I 640 x 480 31.5
kill
--
2 800 x 600 46.9
kllz
3 832 x 624
497kHz
4 1024 x 768 60.2
kHz
5 1152 x 870 68.7
kHz
6 1280 x
\024
80 0 kHz
_7_
1600 x 1200 93.6
kHz
I-----~~~-
I
8 1600 x 1200 100
kHz
9 1600 x 1200 106.3
kHz
I
-
l)VGA I~ d tr,ldemMb nf lUr-..t Cnrporat!on
2)VESA i~ ,I tr,ldl'm,lrl-.ul tilt.' Illln-pmfit llrg,lIl1L,ltHlll, VIdeo
Electrolllc~ Stcll1d,1rd r\~Sl)(l<lt\On
3)r-.tacI!Ho~h l~ ,I Ir,lliL'marl-. ()f Applt' Compukr [nc
Em
• Tht' button~ nil the tront panel ,III<H\' IlMlllldl iHijustnwnt
\\·hen ,1 "'1~n .... 1 tWin l'qulpnH'nt uther 111,111 the pre~et·type
HHH.it'b.,.; mput \;inL' dllterl'lIt m,lnu,llly ,1Jju~tl;.'d d,lta
.HI..' ~tllrl'd in 1lH"II\llrv, ,1nd LlllL'd b.l~l.. when the '>,lnlL'
:::OlMI1,lll:::O Input ,1g,lIn:::oo th,lt tilt., Opltll1Ul\1 dl:>plav lor thl~
'>1 t; 11 ,1 I I." ,)bt,lllll'd ,lut{ltn,IIIl,llly
mn1
If you do not att,Kh the h~rnte core, the monitor
will not (ontorm 10 manJatory FCC st,lIldarJ."
that Issues :::ouch ~lgnal I::. connected, thl! optimum dbplay IS
obtained without any manual adjustment .
The factory-preset adjustment data are listed below:
Vertical Graphics
mode
frequency
Iilliz
YGA GraphiC 1)
75 Hz
YESA2)
75 Hz
Macmtosh 16" color)) I
75 Hz
M,Kinto~h 19" color
75 Hz
Macmtosh 21" color
75 Hz
VESA
75 Hz
VESA
80Hz
1
VESA
85 Hz
I
VESA
• The type ot Input vldeu Signal is dlstlnguisht:'d according
to its ~ignal ::.peClficatlOns, such.1s horizontal frequency or
::.ync polaflty. When the Signal specitications 01 the mput
::.!gnaJs iHe almost same, these signals may not be
dIStingUished ,l~ bemg different.
• If \fOll use a computer or vH.iea board of high output level
(,lbullt 1.0 Yp-pl, you may not bt' able to obtam the
optimum display. In such case, try decre,\sing the pICture
(Ulltr""t (p,lge H)
7

SECTION 2
DISASSEMBL
Y
GDM-20SHT
2-1. REAR CABINET AND TOP COVER REMOVAL
2-2. D BLOCK ASSY REMOVAL
CD Five screws
(-t-BVTP M4 x 8)
CD Four screws
(+BVTP 4 x 16)
CD Rea' cablnel j
~/~
,. ,
~
®Two screws
(+-BVTP M4 x 8)
!J) Rear shield
I
)
CD Two push rivets
!J) Two screws
(+-BVTP M3 x 8)
\ @Two PCB holde'
,.1
CD Screw j Push
(+--BVTP M4 ,81 ~ ~
CD Four screws
(-t-BVTP M4 x 8)
-7-
CD 0 block assy
(Remove the twelve connectors,
CN401-404, 406-411, FV1, FV2)

GDM-20SHT
2-3. POWER BLOCK ASSY REMOVAL
IJ) Top shield
""Q
,
CD Two PCB holder
CD Four screws
G)Twoclaws
CD Power block assy (+-BVTP M4 x 8)
(Remove the three connectors
CN603, 605, 606)
2-4. L BOARD REMOVAL
G) L board
~~d--t~CD Two claws
-8-

2-5. M BOARD REMOVAL
2-6. A BLOCK ASSY REMOVAL
FV1
Earth lead CN101
@M board
CD Two screws
.
~ (-t-BVTP M4 x 8)
~:?"\
1
CD Two screws
(+-BVTP
M3 x 8)
CD Two screws
(+-BVTP 3 x 12)
CD Video shield cover
CN104
)~
" CN102
CD A block assy
(Remove the eleven connectors,
GDM-20SHT
CN1 01-104, J1 01-301, FV1, FV2, NTC, Earth lead)
(DScrew
(Hexagon head screw M4 x 20)
-9-

GDM-20SHT
IDBI
[8J
REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK
RESISTOR
D901 8·719-045-19 DIODE SPB-26MVWF
D902 8-719-311-90 DIODE SEL1922D-C
Rl0l
1-216-073-00 METAL GLAZE 10K 5%
WOW
D903 <4-049-089-01 HOLDER, LED
Rl02
1-208-806-11 METAL CHIP 10K
0.50%1/10W
0903
8-719-311-90 DIODE SEL1922D-C
Rl03
1-218-768-11 METAL CHIP 470K
0.50%1/10W
Rl04
1-218-760-11 METAL CHIP 220K
0.50%1/10W
0904
8-719-311-90 DIODE SEL1922D-C
Rl05
1-216-649-11 METAL CHIP 820
0.50%1/10W
D905 8-719-311-90 DIODE SEL1922D-C
0906 8-719-311-90 DIODE SEL1922D-C
Rl06
1-216-663-11 METAL CHIP 3.3K
0.50%1/10W
0907 8-719-311-90 DIODE SEL1922D'C
Rl07 1-216-057-00 METAL GLAZE 2.2K 5%
1/10W
0908
8-719-911-19 DIODE lSSl19-25
Rl08
1-216-073-00 METAL GLAZE 10K 5%
1/10W
Rl09
1-216-627-11 METAL CHIP 100
0.50%1/10W
D909 8-719-911-19 DIODE
lSSl19-25
Rll0
1-216-049-91 METAL GLAZE
lK 5%
1/10W
D910 8-719-911-19 DIODE lSS119-25
D911
8-719-911·19 DIODE lSS119-25
Rlll
1-216-049-91 METAL GLAZE
lK 5%
1/10W
0912 8-719-311·90 DIODE SEL1922D-C
R112 1-216-049-91 METAL GLAZE
lK 5%
1/10W
0913 8-719-109·85 DIODE
RD5.1 ESB2
R113 1-249-887-11 CARBON 33 5%
1/4W F
R114 1-208-806-11 METAL CHIP 10K
0.50%1/10W
0914 8-719-109-85 DIODE RD5.1 ESB2
R115 1-208-814-11 METAL CHIP 22K
0.50%1/10W
0915 8-719-109-85 DIODE RD5.1 ESB2
D916 8-719-109-85 DIODE RD5.1ESB2
Rl16
1-208-814-11 METAL CHIP 22K
0.50%1/10W
D917 8-719-109-85 DIODE RD5.1 ESB2
Rl17 1-208-e06-11 METAL CHIP 10K
0.50%1/10W
0918 8-719-109-85 DIODE
RD5.1 ESB2
R118 1-216-057-00 METAL GLAZE 2.2K 5%
1/10W
R119 1-216-627-11 METAL CHIP 100
0.50%1/10W
D919 8·719-109-85 DIODE RD5.1 ESB2
R123 1-249-437·11 CARBON 47K 5%
1/4W 0920 8-719-911-19 DIODE lSS119-25
0921 8-719-911-19 DIODE
lSSl19-25
R124 1-249-437-11 CARBON 47K 5%
1/4W
0922
8-719-911-19 DIODE lSSl19-25
R126 1-208-854-11 METAL CHIP
1M
0.50%1/10W
D923 8-719-911-19 DIODE lSS119-25
R130 1-208-806-11 METAL CHIP 10K
0.50%1/10W
0924 8-719-311-90 DIODE SEL1922D-C
1rw ............. , ................................................................. 1I''Ir* .............. ."." ... .",., ....... 11' ...... ."." • ."11'11',,, .........
IC
H BOARD
IC931 8-759-285-18 IC MC68HC05P7BSC402191 B
........................... -IC932 8-759-165-81 IC PST600D-T
(BOARD PART NO. 1-657-355-11)
4-045-133-01 HOLDER (B), LED COIL
L901
1-410-482-31 INDUCTOR 100UH
CAPACITOR
C904 1-102-114-00 CERAMIC 470PF 10% 50V TRANSISTOR
-. C905 1-102-114-00 CERAMIC 470PF 10% 50V
-. C906 1-102-114-00 CERAMIC 470PF 10% 50V 0931 8-729-900-36 TRANSISTOR DTC124ES
C907 1-102-114-00 CERAMIC 470PF 10% 50V
0932
8-729-902-80 TRANSISTOR DTA114YS
C931
1-128-057-11 ELECT 330MF 20% 6.3V
0933
8-729-902-80 TRANSISTOR DTA114YS
C932 1-161-051-00 CERAMIC O.OlMF 10% 50V
C933 1-126-160-11 ELECT
lMF
20% 50V RESISTOR
C945 1-136-165-00 FILM O.lMF 5% 50V
C990 1-136-153-00 FILM
O.Q1MF
5% 50V
R901
1-247-807-31 CARBON 100 5%
1/4W
C991
1-136-153-00 FILM
O.Q1MF
5% 50V R902 1-247-807-31 CARBON 100 5% 1/4W
R903 1-247-807-31 CARBON 100 5%
1/4W
C992 1-136-153-00 FILM O.OlMF 5% 50V R904 1-247-807-31 CARBON 100 5% 1I4W
C993 1-136-153-00 FILM O.OlMF 5% 50V R905 1-247-807-31 CARBON 100 5%
1/4W
R906 1-249-423-11 CARBON 3.3K 5%
1/4W
CONNECTOR R907 1-247-807-31 CARBON 100 5%
1/4W
R908 1-249-425-11 CARBON 4.7K 5%
1/4W
CN901<1-564-525-11 PLUG, CONNECTOR lOP R909 1-249-425-11 CARBON 4.7K 5%
1/4W
R910 1-249-425-11 CARBON 4.7K 5% 1/4W
DIODE
R911
1-249-425-11 CARBON 4.7K 5%
1/4W
R912 1-247-807-31 CARBON 100 5%
1/4W'
.
.
"-
0901 <4-049-089-01 HOLDER. LED R913 1-247-807-31 CARBON 100 5% 1/4W
-76 -

GDM-20SHT
[H]
[IJ
REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK
R914 1-247·807·31 CARBON 100 5%
1/4W
C711
1·124-122-11 ELECT 100MF 20% 50V
R915 1-247·807·31 CARBON 100 5%
1/4W
C712 1-102·973-00 CERAMIC 100PF 5%
SOV
R916 1-247·807·31 CARBON 100 5%
1/4W
C713 1-102·973-00 CERAMIC 100PF 5% 50V
R917 1·247·807·31 CARBON 100 5% 1I4W C714 1-102·121·00 CERAMIC 0.0022MF 10% 50V
R918 1·247·807·31 CARBON 100 5%
1/4W
C715 1-126-964·11 ELECT 10MF 20% 50V
R919 1·247·807-31 CARBON 100 5%
1/4W
C716 1-126·964-11 ELECT 10MF 20% 50V
R921
1-247-903-00 CARBON 1M
5%
1/4W
C717 1·126·967·11 ELECT 47MF 20% 50V
R931
1-249-437-11 CARBON 47K 5%
1/4W
C718 1-126-967-11 ELECT 47MF 20% 50V
R932 1-249-437-11 CARBON 47K 5%
1/4W
C719 1·126-964-11 ELECT 10MF 20% 50V
R933 1-249-437-11 CARBON 47K 5%
1/4W
C720 1·126·964-11 ELECT 10MF 20% 50V
R934 1-249·437-11 CARBON 47K 5%
1/4W
C721
1·136-165-00 FILM 0.1MF 5% 50V
R935 1·247-903-00 CARBON
1M 5%
1/4W
C722 1-137-364·11 FILM 0.001MF 5% 50V
R936 1·247·895-00 CARBON 470K 5%
1/4W
C723 1-136-165-00 FILM 0.1MF 5% 50V
R937 1-249-437-11 CARBON 47K 5% 1/4W C726 1-126-964-11 ELECT 10MF 20% 50V
R938 1-249-437-11 CARBON 47K 5% 1/4W C727
H26-964·11 ELECT 10MF 20% 50V
R939 1-247·895-00 CARBON 470K 5% 1/4W C728
H36-169-00 FILM 0.22MF 5% 50V
R940 1·249-437·11 CARBON 47K 5% 1/4W C729 1-136-169-00 FILM 0.22MF 5% 50V
C730 1-102·074·00 CERAMIC 0.001MF 10%
SOV
SWITCH
C731
H02-074·00 CERAMIC 0.001MF 10% 50V
C732 1-136-169-00 FILM 0.22MF 5% 50V
S902 1·571-532-21 SWITCH, TACTIL
S903 1-571-532-21 SWITCH, TACTIL
S904 1-571·532-21 SWITCH, TACTIL CONNECTOR
S906 1-571-532-21 SWITCH, TACTIL
S907 1-571·532-21 SWITCH, TACTIL CN701'1-564-514·11 PLUG, CONNECTOR
11 P
CN702'1-564-511·11 PLUG, CONNECTOR 8P
S908 1-571·532·21 SWITCH, TACTIL
S910 1-571-532·21 SWITCH, TACTIL
S911
1-571-532-21 SWITCH, TACTIL DIODE
S912 1-571-532·21 SWITCH, TACTIL
S913 1-571-532·21 SWITCH, TACTIL 0701 8-719-979-84 DIODE EGP20DPKG23
0702 8-719-979-84 DIODE EGP20DPKG23
S914 1·571-532·21 SWITCH, TACTIL 0703 8-719-911-19 DIODE 1SS119-25
S915 1-571-532-21 SWITCH, TACTIL
0704
8-719-911-19 DIODE 1SS119-25
S916 1-571·532-21 SWITCH, TACTIL 0705 8-719-109-54 DIODE RD2.2ESB2
0706 8-719-109-54 DIODE RD2.2ESB2
CRISTAL
X931
1·577·358-21 VIBRATOR, CERAMIC IC
IC701
8-759-803-42 IC LA6500-FA
IC702 8-759-803-42 IC LA6500-FA
....... * ............................ 11' .................................................................................................................................................. ,.. ............
IC703 8-749-924-04 IC STK390-120
IC704 8-759-803-42 IC LA6500-FA
CONVERGENCE ADJ MCB ASSY (L BOARD)
.................................................................. ,.. ................................
(BOARD PART NO. 1·657-356-11) TRANSISTOR
4·382·854-21 SCREW (M3X14), P, SW (+) (IC703) 0701 8-729-900-36 TRANSISTOR DTC124ES
CAPACITOR RESISTOR
C703 1-137
-364-11 FILM 0.001MF 5% 50V
R701
1-215-469-00 METAL 100K 1% 1/4W
C704 1-136-165-00 FILM 0.1MF 5% 50V R703 1-249-423-11 CARBON 3.3K 5% 1/4W
C705 1-137-364-11 FILM 0.001MF 5% 50V R704 1-215-434-00 METAL 3.6K 1%
1/4W
C706 1-136-165-00 FILM 0.1MF 5% 50V R705 1-215-423-00 METAL 1.2K 1%
1/4W
C707 1-102-518-11 CERAMIC 33PF 5% 50V R706 1·249-381·11 CARBON 1 5%
1/4W
F
C708 1-102-074-00 CERAMIC 0.001MF 10% 50V R707 1-215-373-31 METAL 10 1%
1/4W
C709
H07-889-11 ELECT 220MF 20% 25V R708 1-249-429-11 CARBON 10K 5% 1/4W .
1-124-122-11 ELECT R709 1-249-420-11 CARBON .
"-
C710 100MF 20% 50V 1.8K 5%
1/4W
-77-

GDM-20SHT
REF.NO. PART NO. DESCRIPTION
R710 1·249-422-11 CARBON 2.7K
R711 1·249-407-11 CARBON 150
R712
R714
R715
R716
R717
R718
R719
R720
R721
R722
R723
R724
R725
R726
R727
R728
R729
R730
R731
R732
R733
R739
R741
9-978-489-01
1-249-386-11 CARBON
1-249-425-11 CARBON
1-249-421·11 CARBON
1-249·405·11 CARBON
1-249·405·11 CARBON
1·216-423-11 METAL OXIDE
1-216-351·00
METAL OXIDE
1-249-425-11 CARBON
1-249-441·11 CARBON
1-249-437·11 CARBON
1-249-434-11 CARBON
1-217-637-00 FUSIBLE
1-217-637-00 FUSIBLE
1·215-453-00 METAL
1·249-423-11 CARBON
1-215-434-00
METAL
1-215-421-00 METAL
1-249-381-11 CARBON
1-215-373-31 METAL
1-215-428·00 METAL
1-249·422-11 CARBON
1-215-458-00
METAL
1-215-445-00 METAL
MISCELLANEOUS
,.. ........ ,..,.. ...... ******.**.** ...
2.7
4.7K
2.2K
100
100
27
1.5
4.7K
lOOK
47K
27K
1
1
22K
3.3K
3.6K
1K
1
10
2K
2.7K
36K
10K
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
1%
5%
1%
1%
5%
1%
1%
5%
1%
1%
Les composants identifies per un trame
et une marque Lt; sont critiques pour la
securite. Ne les remplacer que par une
piece portant Ie numero specifie.
REMARK
REF.NO. PART NO.
1/4W
1/4W F
1/4W F
1/4W
1/4W
1/4W F
1/4W F
lW
F
1W F
1/4W
1/4W
1/4W
1/4W
1/4W F
1/4W F
1/4W
1/4W
1/4W
1/4W
1/4W F
1/4W
1/4W
1/4W
1/4W
1/4W
Sony Corporation .
Consumer A&V Products Company
TV&Display Products Div.
-78-
The components identified by shading
and mark
Lt; are critical for safety.
Replace only with part number specified.
DESCRIPTION
REMARK
Engllsl) ',_
95FK0506-1
Printed in Japan
© 1995. 6

GDM-20SHT
2-7. H BOARD REMOVAL
CD Two screws
(+P4x12)
CD Bezel assy
2-8. PICTURE TUBE REMOVAL
CD Four claws
CD Picture tube
(Remove the four connectors,
CN404, 407, 4P, 2P)
-10 -
CD A block assy
(Refer to 2-6)

GDM-20SHT
2-9. WIRING HARNESS LAYOUT
(1) Left Side
(2) Right Side
oblock assy Power block assy
• REMOVAL OF ANODE-CAP
NOTE: Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon painted on the CRT, after
removing the anode.
• REMOVING PROCEDURES
CD Turn up one side of the rubber cap in
the direction indicated by the arrow 0.
• HOW TO HANDLE AN ANODE-CAP
® Using a thumb pull up the rubber cap
firmly in the direction indicated by the
arrow®.
~
Don't hurt the surface of anode-caps with shartp shaped material!
Don't press the rubber hardly not to hurt inside of anode-capsl
A material fitting called as shatter-hook terminal is built in the
rubber.
® Don't turn the foot of rubber over hardly!
The shatter-hook terminal will stick out or hurt the rubber.
- 11 -
Anode Button
® When one side of the rubber cap is
separated from the anode button, the
anode-cap can be removed by turning
up the rubber cap and pulling
up it in the
direction of the arrow @'

GDM-20SHT
SECTION 3
SAFETY RELATED ADJUSTMENT
When replacing or repairing the shown below table, the
following operational checks must be performed as a
safety precaution against X-rays emissions from the.unit.
HV Regulator D board
CPI,
R099, RI02,
Circuit Check
RI05, T6
DA board C104, C106,
ICIOI,
ICI02, Q106, RI02,
R104,
RI05, RI06,
RI30
• Mounted D board
• Mounted DB board
HV Hold-Down D board C025, CPI,
D9,
Circuit Check D21, R099,
RI02,
R104, R114, R115,
R116, T6
• Mounted D board
Beam Current D board C068, C076, C079,
Protector Circuit C081,
CPI,
D021,
CD and ® Check D022, D024, D025,
L009, R099,
RI02,
RI04,
R105, RI07,
T6
• Mounted D board
B+ Regulator G board IC657, R673
Circuit Check • Mounted G board
OVP Circuit G board C654, D658, D659,
Check IC657, Q654, R659,
RY603
• Mounted G board
Check Condition
Input signal: White dots, fH: 107 KHz BRT and CONT
control to minimum.
a) HV Regulator Check
1) Check that the voltage at pin (]) of N405 IS -.
9.00 ± 0.03 VDC.
b) HV Hold-Down Circuit Check
1) Using an external DC power supply, apply the volt-
age is less than 8.87 VDC between pin ®
of CN405
on D board and confirm that the HV Hold-Down cir-
cuit works (Raster disappears or Power LED blinks.)
c) Beam Current Protector Circuit Check-1
I) Short between pin ® of CN405 on D board and
GND by a short clip under Power
off condition.
2) Confirm that the raster appears
on the CRT screen
under Power on condition.
3) Connect a variable resistor (12 KQ or more) and an
ammeter in series between pin @
of CN405 on D
board and
GND, then decrease gradually the resis-
tance of the variable resistor from maximum to mini-
mum, and confirm that the
beam current protector
circuit-I works (TV Raster disappears
or Power LED
blinks).
The current must be less than 1.35 rnA.
4) Remove the short clip between pin ®
of CN405 on
D board and GND.
d) Beam Current Protector Circuit Check-2
I) Confirm that the raster appears on the CRT screen
under Power on condition.
2) Connect a variable resistor (12
KQ or more) and an
ammeter in series between pin @
of CN405 on D
board and GND, then decrease gradually the resis-
tance
of the variable resistor from maximum to mini-
mum,
and confirm that the beam current protector
circuit-2 works (TV Raster disappears
or Power LED
blinks).
The current must
be less than 1.50 rnA.
e) OVP Circuit Check
I) Using an external DC power supply, increase gradu-
ally the
voltage between pin CD of CN605 on G
board and
GND, and confirm that the OVP circuit
works (TV Raster disappears when the voltage be-
tween pin
CD of CN605 on G board and GND is less
than 199.0 VDC. •
,_
-12 -

GDM-20SHT
SECTION 4
ADJUSTMENTS
Input Signals: SONY-STD-2 (63.337 kHz x 59.978 kHz, 1280 x
1024)
1. Confirming VIDEO output waveform, and ad-
justing RV101, 201, 301
1) Enter the full white signal.
2) Set the R/G/B contrast data to "00", and confirm at the KR,
KG, KB pins
of CRT socket that the pedestal voltage is as
shown below.
VP=50 V±2 V
3) Set the R/G/B contrast data to "FF", connect an oscilloscope
to the KR, KG. KB pins of CRT socket, and adjust the
RVI01, 201, 301, so that the VIDEO output waveform Vs
satisfies the following specification.
Vs KR : 42 Vp-p ± 1 Vp-p
KG.
KB : 40 Vp-p ± 1 Vp-p
2. Confirming and adjusting transient response
1) Connect respective measuring units as shown below.
Tr = Tf = 2.0±0.1ns
Pulse Gem
2) Enter the pulse signals from pulse generator to R input and
set contrast data to "FF".
3) Connect an oscilloscope probe to KR. set the time axis to 20
ms/div, and adjust the CTI0l not to allow a sag or smear in
the falling edge
of waveform.
U
-' 100%
I I
I I
\ I - - 0%
~ I ~d~~~ the trimmer
Smear Q
~e flat
Sag
4) Press the xIOMODE button of time axis on oscilloscope. and
confirm that the Tr. Tf. undershoot, overshoot. and ringing
of waveform are within the specification.
5)
If the undershoot is over the specification. readjust the trim-
mer so that the undershoot is below 12%.
Overshoot
;;;; 10%
J~ __ _
Ringing;;;; 10%
10% I
Trm ;;;;3.8ns
.. I I
..
6) Also for the KG and KB pins of CRT socket, perform adjust-
ment given
in steps (2) to (5) in the same manner.
(For the KG, adjust CT201; for the KB. adjust CT301)
• Landing Rough Adjustment
1. Enter the full white signal.
2. Adjust the contrast to the maximum.
3. Make the screen monogreeen. (tum off R, B input signals).
4. Reverse the DY, and
adjust coarsely the purity magnet so
that a green raster positions in the center
of screen.
5. Moving the DY forward, adjust so that an entire screen be-
comes monogreen.
6. Adjust the tilt
of DY. and fix lightly with a clamp.
• Convergence Rough Adjustment
1. Enter the white crosshatch signal.
2. Open the hexode knob mounted at the CRT neck to 60'.
3. Adjust coarsely the horizontal convergence using the H-
STAT VR on the board A.
4.
Adjust coarsely the vertical convergence through the V-
ST AT bus adjustment.
XBV
DY spacer
Purity magnets
H.STAT VR
(RV2)
-13 -

GDM-20SHT
• Landing Fine Adjustment
1. Place the set in the Helmholtz coil.
2. Enter a green signal only, and adjust the contrast to the maxi-
mum.
3. Attach a wobbling coil to the specified position of CRT
neck.
4. Attach a landing adjuster sensor on the CRT.
5. Using a landing checker, adjust the DY position, purity, tilt
of DY, and landing at the center and four comers.
6. Remove the landing adjuster sensor.
7. Swing up and down the DY so that the top and bottom pins
are equal. Also, swing left and right the DY
so as to attain the
best horizontal trapezoid, and insert wedges in the form
of
reverse "Y" to secure the DY.
8. Attach a landing adjuster sensor on the CRT.
9. Confirm the landing at each comer. and if out of specifica-
tion, stick a disk magnet
to the funnel section. and perform
adjustment.
10. Change over the input signal to R, G, B and confirm that the
purity
of monocolor is good.
11. Confirm that the DY is not tilted, then fix the purity magnet
with a white pen.
• Convergence Fine Adjustment
1. Enter the white crosshatch signal of the mode 3.
2. Confirm that the V-STAT and H-STAT for the user control
are in the center.
3. Adjusting the RV -2 (H-STAT VR) on the board A, make
red, green, and blue lines parallel (vertical lines). Through
the bus adjustment, adjust the V
-STAT to make red, green,
and blue lines parallel (horizontal line).
4. Adjust the magnet ring (hexode) at the rear of NTC so that
the
distance between red and green, and the distance be-
tween blue and green
of three color lines are equal. If the
compensation is deficient. adjust additionally the magnet
ring at the rear
of DY.
5. Returning the H-STAT VR and the V-STAT bus control ad-
justed in step
3, eliminate a misconvergence in the center of
creen.
6. Fine adjustment of convergence
1) Adjust the XBV misconvergence with the XBV reactor.
2) Adjust the XCV misconvergence with the XCV reactor.
3) Adjust the Vertical misconvergence with the TVL.
4) Confirm the convergence
of entire screen.
5) Fix the XBV, XCV, hexode, and H-STAT VR with a
white pen.
RGB
XCV Misconvergence
B R
><
--~f:--- R
-- -- G
--~ \--- B
I I
• Digital Convergence Fine Adjustment
1. Enter the white crosshatch signal of the mode 3.
2. Connect only the Rand B signals.
3. Adjustment of NTC (bus adjustment)
1) Adjust the center convergence of screen with the
V-STAT.
2) Adjust the bottom convergence
of screen with the NTC
BOTTOM.
3) Adjust the top convergence of screen with the NTC
TOP.
4. H-CONV. adjustment (bus adjustment)
1) Set the bus data H-STAT to 148 (94h), and adjust the H-
STAT with the H-STAT VR on the board A.
2) Adjust the convergence at the position as shown in the
order
of numbers.
3) The H-STAT,
if finely adjusted again, should be in the
range of 120 to 168.
4) Save the data.
5) Although the adjustment is executed for the signals
other than mode 3, the factory area for V
-STAT and H-
STAT is common to all modes, and therefore, do not
change the V
-STAT and H-STAT after they are adjusted
in the mode 3.
6) Copy the bus data of mode 3 to all modes.
7) Execute adjustment
in all modes in the same manner as
that in 4-2).
8) After the adjustment is over, save the data.
9) If out of specification 0.24 mm or less, adjust using a
sheet
of permalloy. (Replace the DY, if more than five
sheets are required.)
B Prime mode 0.24 mm
A Others 0.24 mm
B Prime mode 0.24 mm
Others 0.28 mm
-14 -

GDM-20SHT
Connect the communication cable of the computer to the connector located on the D board on the monitor. Run the service software and
then follow the instruction.
Adjustment
Software
DAS Ver X.X
~
Programmable
S.G
Serial
IIF
RS232C
Serial
IIF
RS232C
ex. PC-AT compatible
• White Balance Adjustment Methods
Adjustments Input signal Value of CONT, BRT
procedure
ADJUSTMENT G2
I
COLOR Mode "H"
2
Grayscale pattern
CONT=255. BRT=85
ADJUSTMENT 9300K
I
Gray scale
RBKC. BBKC to ° CONT=255. BRT=x5
2
Gray scale
CONT=255, BRT=85
3 Full
white pattern CONT=255, BRT=85
4 Full
white pattern
CONT=O, BRT=85
5
Black pattern CONT=O, BRT=255
6 Full
white pattern CONT=255, BRT=255
Adjust point
G2
GBKC
RBKC,BBKC
RDCM. GDCM, BDCM
RDCN, GDCN, BDCN
RBKM, GBKM, BBKM
RDMM, GDMM. BDMM
7
Confirm white balance tracks with CO NT and BRT.
Set CONT=255 and BRT=85 color savc
ADJUSTMENT 6500K
I
COPY 9300K data to 6500K. Select color mode to "MID"
2
Gray pattern
CONT=255, BRT=85
RBKC,BBKC
3 Full white pattern
CONT=255, BRT=85
GDCM, BDCM
4 Full white pattern
CONT=O, BRT=85
GDCN. BDCM
5
Black pattern CONT=O, BRT=255
RBKM, GBKM. BBKM
6 Full
white pattern
CONT=255. BRT=255
RDMM. GDMM, BDMM
7
Confirm white balance tracks with CO NT and BRT. Set CONT=255 and BRT=85 color save
ADJUSTMENT 5000K
I
COPY 9300K data to 5000K. Select color mode to "LOW"
2
Gray pattern
CONT=255, BRT=85
RBKC,BBKC
3 Full white
pattern
CONT=255, BRT=85
GDCM. BDCM
4 Full white pattern CONT=O, BRT=85
GDCN, BDCN
5
Black pattern
CONT=O, BRT=255
RBKM, GBKM, BBKM
6 Full
white pattern
CONT=255, BRT=255
RDMM. GDMM, BDMM
7
Confirm white balance tracks with CONT and BRT. Set CONT=255 and BRT=85 color save
-15 -
--

GDM-20SHT
• DIAGNOSIS
The monitor is equipped with self diagnosis and failure indication. Indicators will blink when the monitor detects adjust- _
ment limit or a major failure.
~
CONVER SHAPE SIZE CENTER
Power Save
Power
State (Amber) (Green)
Power ON Normal OFF
OFF
OFF
OFF
OFF
ON
NO. H Sync Stand-by
OFF
OFF
OFF
OFF ON ON
NO. V Sync Suspend
OFF OFF OFF OFF
ON ON
NO. H/V Sync Active
off
OFF
OFF
OFF
OFF ON
OFF
Out of Range Out of Range OFF
OFF
OFF
OFF
ON Fla,hing
H. Failure Failure
OFF
OFF
OFF
ON Flashing Flashing
V. Failure Failure OFF
OFF
ON
OFF
Flashing Flashing
IK Protector Failure OFF ON OFF
OFF
Flashing Flashing
HV Protector Failure ON OFF
OFF
OFF
Flashing Flashing
-16 -

SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAMS
~-----
-17 -
GDM-20SHT
L ___ '
TS02
?"
~ - - - I"
GC
L
I, G==j
1 ____ -.J