Sony Multiscan GDM-2036S User manual

SERVICE MANUAL
"l,
Chassis No. SCC-E268'~
SPECIFICATIONS
Picture tube
Effective picture size
Resolution
Display picture size
0.30 mm aperture grill pitch
20 inches measured diagonally
90-degree deflection
Approx. 384 x 290
mm (w/h)
(15 1
/4 x 111/2 inches)
Horizontal: 320* to 1280 dots
(*VGA mode)
Vertical: 200* to 1024 lines
(*VGA mode)
Approx. 360 x 270 mm (w/h)
(141/4 x 10 3/4 inches)
or
Approx. 343 x 274 mm (w/h)
(\3 5/
S x 10 7/S inches)
Deflection frequency
AC input voltage/current
Dimensions
Weight
Supplied accessory
Horizontal : 30 to
71 kHz
Vertical: 50 to 120Hz
100 to 120V. Max. 3.7A
220 to 240V. 2.0A
480 x 479 x 504.5 mm (w/h/d)
(19 x 18 7/S x 19 7/S inches)
Approx. 32kg (70
Ib 9 oz)
AC power cord (for 100 to 120V
only)
Signal cable (VGA -BNC x 5)
Design and specifications are subject to change without
notice.
- Continued on next page -
MULTISCAN®
COLOR GRAPHIC DISPLAY
SONY
.!

Supplied Si~nal Connecting Cable
T:he pin assignment of the supplied signal connecting cable
is shown below.
15-pin D-sub connector
Green
Blue
~.JIIU""" Video signals
Horizontal
~"1IlrIIEM' sync signal
Vertical
---"..IIIU_' sync signal
Pin No.
1
2
3
4
5
6
7
8
Signal
Red video
Green video
Blue video
GND
N.C.
Red GND
Green GND
Blue GND
Pin No. Signal
9 N.C.
10
GND
I
11
GND
12
N.C.
13
Horizontal sync
14 Vertical sync
15 N.C.
!~
------------
Detailed Timing Specifications of Preset-Type Models
Mode 1 2 3 4
Equiv. Standard VGA
MeGA' VGA Macintosh II
Graphics" Text"
Resolution
(H x V)
640 x 480 640 x 350 720 x 400 640 x 480
Dot Clock (MHz) 25.175 25.175 28.332 30.240
Horizontal""
Hor. Ireq. (kHz) 31.469 31.469 31.480 35.000
H-total 31.778 31.778 31.766 28.571
H-Front porch 0.636 0.636 0.635 2.116
H-Sync. width 3.813 3.813 3.812 2.116
H-Back porch 1.907 1.907 1.906 3.175
H-blanking 6.356 6.356 6.353 7.407
H-Active 25.422 25.422 25.413 21.164
(~sec)
Vertical
Ver. Ireq. (Hz) 59.94 70.09 70.11 66.67
V-total 525 449 449 525
V-Front porch
10 37 12
3
V-Sync. width 2 2 2 3
V-Back porch 33 60 35 39
V-blanking 45 99
49 45
V-Active 480 350 400 480
(Lines)
Sync. External External External Internal
H-Polarity
(-)
(+)
(-)
N.A.
V-Polarity
(-)
(-)
(+) N.A.
Scanning mode Non-interlace Non-interlace Non-interlace Non-interlace
•
••
VGAlMCGAl8514A does not include border area
Recomended horizontal
timing conditions:
Horizontal front porch should be >0.1 ~sec
Horizontal sync. width should be > 1.0~sec
Horizontal back porch should be > 1.8~sec
Horizontal blanking width should be >3.5~sec
-2-
5 6 7 8 9
8514A" VGA+ Sony Sony Macintosh
II
Std.-l Std.-2 Two-Page
1024 x 768 800 x 600 1024 x 768 1280 x 1024 1152 x 870
44.900 40.000 64.000 108.180 100.000
35.522 37.879 48.780 63.337 68.681
28.151 26.400 20.500 15.789 14.560
0.178 1.000 1.000 0.407 0.320
3.920 3.200 1.500 1.701 1.280
1.247 2.200 2.000 1.849 1.440
5.345 6.400 4.500 3.956 3.040
22.806 20.000 16.000 11.832 11.520
86.96 60.32 60.00 59.98 75.06
408.5 628 813 1056 915
0/0.5 1 3 3 3
4 4 3 3 3
20/20.5 23 39 26 39
24/25
28 45 32 45
384 600 768 1024 870
External External Internal Internal External
(+)
(+)
N.A. N.A.
(-)
(+) (+)
N.A. N.A. H
Interlace Non-interlace Non-interlace Non-interlace Non-interlace

Neverapplythe power supply voltage morethan AC150V in
the 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 TO
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 TO SAFE OPERATION ARE
IDENTIFIED IN THIS MANUAL. FOLLOW THESE PRO·
CEDURES WHENEVER CRITICAL COMPONENTS ARE
REPLACED OR IMPROPER OPERATION IS SUSPECTED.
OVERVIEW
The Sony GDM-2036S is a multiscan-type Trlnitron ,.. color graphic display, that
displays the video signals input from the connected computer with the optimum
picture quality. It
can input the wide range of video signals (30 to 71 kHz of
horizontal scan and
50 to 120 Hz of vertical scan), and can be used with a variety
of computers and workstations. Its new "Sony Display Memory System (SDMS)"
automatically distinguish the type of input signals and provides
an optimum display
without any manual adjustment. It has factory-preset display values for 9 different
types of signals (preset-type models) within the SDMS memory. The values for up
to 15 types ofsignals can additionally
be preset to the memory.
The Sony GDM-2036S is a result of Sony's 20-year commitment to the proprietary
Emmy Award winning Trinitron and our engineering expertise.
~3-
IGDM-203

~DM .. 2036S
TABLE OF CONTENTS
Section
Title
1. GENERAL
1-1. Function ofControls .............. , . . .. .. .. . . .. . . . ... 6
1-2.
Connections········································· 8
1-3. Preset Mode· . . .. . . .. . . .. . . .. . .. .. . . .. .. . .. . .. . .. . .
.. 9
1-4.
Adjustment········································· ·10
2. DISASSEMBLY
2-1. RearCabinet and Top CoverRemoval· ............... ·14
2-2. H-STAT VR and Focus Pack
Removal················ ·14
2-3. Bezel Removal
..................................... ·15
2-4. H4 Board Removal
................................. ·15
2-5. PowerSwitch Removal·
............................. ·16
2-6. A,
Bl, C and Ml board Removal····················· ·16
2-7. G Board (Switching Regulator) Removal·
............. ·17
2-8. N Board Removal·
.................................. ·17
2-9. D3 Board Service Position·
.......................... ·18
2-10. Picture Tube Removal·
............................... 19
2-11. Wiring Hamess Layout· ............................. ·20
2-11-1. A, Bl, C and Ml Board .. ······················2O
2-11-2. D3 Board, N Board, Focus Pack
and
H. STAT VR· ............................ ·21
2-11-3. D3 Board Location
........................... ·22
2-11-4. D3 Board Location
........................... ·23
3. CIRCUIT DISCRIPTIONS
Section
3-4-5.
3-4-6.
3-4-7.
3-4-8.
Title
Dynamic Focus Circuit ·······················28
High Voltage Hold-Down Circuit············· ·29
Beam ProtectorCircuit·
...................... ·29
CRT Protector
...................•.......... ·29
3-4-9.
H, V Static Convergence· .................... ·29
3-5. H4 Board
......................................... ·29
3-6.
Ml Board· ........................................ ·29
3-7. G
Board·········································· ·29
3-7-1. AC Input-Degauss Circuit-Rect &
SmoothingSection ........................... ·29
3-7-2. Start-Up and Oscillation
Circuit· ............. ·30
3-7-3.. Converter section ............................ ·30
3-7-4. OCP Circuit (Overcurrent Protector Circuit) ····31
3-7-5. OVP Circuit (Overvoltage ProtectorCircuit) .,. ·31
3-7-6. Fall
Mode·································· ·31
3-8. N board············································31
3-8-1.
Composition································ ·31
3-8-2. Horizontal and Vertical Oscillations
Sync Circuit·
............................... ·31
3-8-3. Picture Distortion Correction Wavefonn
Generation Circuit·
.......................... ·32
3-8-4. CPU Periphery Circuit·
...................... ·32
3-8-5. Picture Distortion Correction Adjustment Circuit
CD/A Converter and Its Periphery Circuit) ······33
3-1. A Board ············································25
4. TROUBLE SHOOTING
3-1-1. Composition· ................................ ·25
3-1-2. Contrast Amplifier (AAI Board)· .............. ·25
3-1-3. Pedestal Clamp (AAI Board)· ................. ·25
3-1-4. Inserting the Blank Tip Pulse (AAI Board) ······25
3-1-5. Video Output Amplifier· ...................... : 25
3-1-6. Blanking Circuit and Bias Circuit G1 ........... ·26
3-2.
Bl Board···········································26
3-2-1. Sync Separation Circuit ....................... ·26
3-2-2. Blank Tip Pulse Generation Circuit
·············26
3-2-3. Blank Mix Circuit· ........................... ·26
3-2-4.
Interface····················· .. ·············· ·27
3-3. C Board
············································27
3-4. D3 Board .......................................... ·27
3-4-1. PWM Reference, H SAW Generating Circuit
····27
3-4-2. Horizontal Deflection Circuit· ................. ·27
3-4-3. High-VoltageCircuit
.......................... 28
3-4-4. Vertical Deflection Circuit ·····················28
--4-
4-1. Trouble Shooting .................................. ·36
4-2. Parts Level Board
Repair··· .. · .. · .. ········· .... · .. ·51
4-2-1. D3 Board
................................... ·52
4-2-2.
Bl Board· .................................. ·62
4-2-3. A Board'
................................... ·64
4-2-4. G Board···································· ·67
4-2-5. N
Board····························· ....... ·71
5. SAFETY RELATED ADJUSTMENT············ ·87
6. ADJUSTMENTS
6-1. Adjustments Procedure· ............................ ·88
6-2. Picture Projection
Test······························9O
6-2-1. Picture Projection ............................ 90
6-2-2. Checking the Operation
of Bach Section········9O
6-2-3. Checking the Voltage· ....................... ·90

Section
Title
6-3. Adjustment· ....................................... ·90
6-3-1. White Balance
Rough Adjustment ·············90
6-3-2. Beam Landing Rough Adjustment············ ·91
6-3-3. Convergence Rough Adjustment·············· ·92
6-3-4.
Beam Landing Fine Adjustment ···············92
6-3-5. Synchronization Check ·······················93
6-3-6. Vertical and Horizontal Position
and Size Adjustment· ........................ ·93
6-3-7. Left
and Right Pin-Cushion
Distortion Adjustment
....................... ·94
6-3-8. Vertical Linearity
Adjustment················ ·95
6-3-9. Overall Image Distortion
Check·············· ·95
6-3-10. Focus
Adjustment··························· 95
6-3-11. Static Convergence Adjustment· . . .. . . .. . . .. .. 95
6-3-12. White Balance Fine Adjustment·············· ·98
6-4. Using
the GDM-2036S Service Jig·················· ·99
6-4-1. Adjustment Flow Chart
...................... ·99
6-4-2.
Key Points for Using the Service Jig·········· ·99
6-4-3. Explanation of
Each Adjustment Routine' ..... ·100
6-4-4. Summal)'····· .............................. ·102
6-4-5. Hardware &
How to Connect· ................ ·102
7. DIAGRAMS
7-1. Block Diagrams··································· 105
7-2. Frame Schematic Diagram· ......................... ·115
7-3. Circuit
Boards Location···························· ·120
7-4. Schematic Diagrams
and Printed Wiring Boards· ..... ·121
AA1, C Boards···································· ·122
D3 Board ......................................... ·130
N
Board·········································· ·138
B1 Board········································· ·146
M1, H4 Boards···································· ·151
G, GA, GB Boards·················· ............... ·154
7-5.
Semiconductors··································· ·159
8. EXPLODED VIEWS
8-1. Bezel, Cabinet· .................................... ·161
8-2.
Chassis········ ................................... ·162
8-3. Picture
Tube··············· ....................... ·163
8-4.
Kit········ ....................................... ·164
9. ELECTRICAL PARTS LIST ······················165
-5-

GDM-2036S
1-1. FUNCTION OF CONTROLS
SECTION 1
GENERAL
-6-

ITJ Indicators
One of the indicators that correspond
to the adjustment
item chosen by the SELECT button mlights
up.
Adjustment by the ADJUST +/- buttons m is possible
while the indicator
is lit.
All indicators light
up instantly (for about 0.25 seconds)
when the stored conditions are cleared.
mSELECT button
Press
to select the adjustment item so that the required
indicator lights up.
mADJUST +/- buttons
Adjust the item chosen by using the SELECT button m.
o () (contrast) +/- buttons
Adjust the picture contrast.
[]] Power switch and lamp
Press the I side of the switch to turn
on the power.
Press the 0 side to turn it off.
[I] SwivellTilt stand
The stand allows the angle of the screen
to be adjusted
by 90 degrees horizontally and by 15 degrees vertically.
!Il AC IN connector
[[] VIDEO OUT (video output) connectors (BNC)
Use these connectors to distribute the video signal fed to
this unit to another monitor.
When cables are connected to these connectors, the
75-ohm termination of the VIDEO
IN connectors [!] is
released automatically.
[!] VIDEO IN (video input) connectors (BNC)
Accept RGB video signals (O.714Vp-p, positive).
When no external sync signal
is applied, an internal sync
signal (0.286Vp-p, negative) must
be added to the G
(green) signal.
I~Mtj
The optimum display may not be obtained when using
computer or video board of high output level
(approx.1.0Vp-p).
In such a case, adjust the display by
lowering the contrast, or use computer or video board of
adequate output level.
GDM-203~'~
~ SYNC OUT (sync output) connectors (BNC)
Use these connectors to distribute the external sync
signal fed to this unit,
to another monitor.
When cables are connected to these connectors, the
termination of the SYNC
IN connectors [1] is released
automatically.
m:ma
• Use a coaxial cable that is less than 3 meters long and
of 75 ohms impedance to connect the VIDEO OUT and
SYNC OUT connectors. If the cable is too long, or
if
its impedance is incorrect, or if several monitors are
connected
in cascade, the picture may be noisy with
horizontal and vertical lines.
• When not distributing signals to another monitor,
disconnect the cables from the VIDEO OUT and SYNC
OUT connectors.
• If the BNC connector of the signal distributing cable
is
not adequate, the termination impedance may not be
disconnected properly. Always use the cable with
adequate BNC connectors.
TIl SYNC IN (sync input) connectors (BNC)
Accept external sync signals
(2 to 5Vp-p, positive or
negative).
HD : for horizontal drive pulse or composite drive pulse
VD : for vertical drive pulse
When an external sync signal is applied, the monitor
is
switched automatically from the internal sync mode to
the external sync mode. When the G signal contains the
sync signal, however, the hue of the monitor may
be
changed. In this case, disconnect the external sync
signal and apply the internal sync signal mode.
[g] 75Q/2kQ selector
Switches the impedance of the SYNC
IN connectors
termination to 75Q or to 2kQ. When external sync
signals are input, normally set this selector to the
75J:2
position. If good synchronization cannot be obtained. set
this selector to the 2kQ position.
[1] RESET button
Press to clear every stored display condition for 15
different types of input signals.
Press the button while the power
is turned on.
-7-

GDM-2036S
1-2. CONNECTIONS
Connect the computer using the supplied signal connecting cable as shown.
When connecting with other cables, refer to the instruction manual supplied with the
cable
or the computer.
GOM-2036S (rear panel)
I I
.. )---~~~---....,j~=[!D~~""~[;)J--:J1I1 i..oj°u~! OOiJ
Supplied - • 'II ..
to a wall outlet power cord
Computer
:~
_ _ _ '- '- to video output
I.:;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;~
-8-
l r
L -,.
.1,1 ~ I II, to
~ "" VIDEO IN RlGIB
l SYNC IN HONO
Supplied signal
connecting cable

1-3. PRESET MODE
The GOM-2036S adjusts automatically the display size and position to the optimum
in accordance with the input signal
of up to 24 different types.
It has factory-preset setting values for the 9 different types of signals. When a
computer
or a work station that issues such signal is connected, the optimum
display is obtained without any manual adjustment (preset mode).
The factory-preset values and corresponding computer/Work station models (called
"preset-type models· in this manual) are as follows:
No. Display Horizontal Vertical Scanning Preset type
(dots x lines) frequency frequency mode models
1 640 x 480 31.5kHz 60Hz Non Interlace VGA graphic"
----
2 640 x 350 3105kHz 70Hz Non Interlace
MeGA'
3 720 x 400 3105kHz 70Hz Non Interlace VGA
text'
4 640 x 480 35kHz 67Hz Non Interlace Macintosh II"
5 1024 x 768 3505kHz 87Hz Interlace
8514A'
6 800 x 600 3709kHz 60Hz Non Interlace
VGA+'
7 1024 x 768 4808kHz 60Hz Non Interlace Sony standard I
8 1280 x 1024 6303kHz 60Hz Non Interlace Sony standard II
9 1152 x 870 6807kHz 75Hz Non Interlace Macintosh
II"
Two-Page
VGA, MCGA, and 8514A are trademarks of International Business Machines
Corporation.
Macintosh
II is the trademark of Apple Computer Inc.
• The buttons
on the front panel allow manual adjustment when a signal from
equipment other than the preset-type models is input. Fifteen different manually
adjusted conditions are stored
in memory, and called back when the same signal
is input again so that the optimum display for this signal is obtained automatically.
• The type of input video signal is discriminated according to its signal
specifications such as horizontal frequency or sync polarity. When the signal
specifications of the input signals are almost similar however, these signals may
not be discriminated as different.
-9-
GDM-2036S~

GDM-2036S J
1-4. ADJUSTMENT
Procedure
1
2
3
When a computer or a work station of one of the preset-type models or
equivalent is connected, no picture adjustment is necessary.
If you want to change the contrast, use the () +/- buttons. You can, however, adjust
the brightness, picture size and position and the convergence manually by following
the procedure described below.
When a computer
or a workstation other than one of the preset-type models is
connected, proceed as follows to get the optimum picture.
Turn on the unit, and feed the video signal from the connected computer/work
station.
Press the SELECT button
to choose the adjustment item.
The indicator corresponding to the selected item lights up.
When the power is turned on,
the-:¢:- indicator is lit.
Pressing the SELECT button changes the item in the following order:
-'fJ.- ~ H-SIZE ~ H"CENT--7 V-SIZE ~ V-CENT
~ H-STAT ~ V-STAT
For what the indicators mean and how to make an adjustment, see the page 11.
~ ----
Observe the picture, and press the ADJUST +/- buttons while the target
indicator is lit.
~~I -=- =-=-=- ===!===::!!!!o~ll ijEJ rnij
a
If you do not press the SELECT button or the ADJUST +/- buttons within 5 seconds,
the
:':):- indicator lights up again.
-10-

GDM-2036S
What the indicators mean and how to adjust
Indicator that is lit
Meaning/How to adjust
--_._ .. _ ... _-------
I
Adjust the brightness of the picture.
-'f!-
I
i Press ADJUST+ for more brightness.
i Press ADJUST-for less brightness.
I
--~--- -----
".--------------
i
I Adjust the horizontal size of the picture.
H-SIZE i Press ADJUST+ to enlarge the horizontal size.
i Press
ADJUST-to diminish it.
---------- _._---------.- -_. - -.--.~----
Adjust the horizontal position of the picture.
H-CENT Press ADJUST
+ to move the picture to the right.
Press
ADJUST-to move it to the left.
-------
Adjust the vertical size of the picture.
V-SIZE Press ADJUST
+ to enlarge the vertical size.
Press
ADJUST-to diminish it.
Adjust the vertical position of the picture.
V-CENT Press ADJUST
+ to move the picture upward.
Press
ADJUST-to move it downwa~d.
Adjust the horizontal convergence.
H-STAT Press ADJUST
+ to move blue colors to the left and red colors to the right.
Press
ADJUST-to move blue colors to the right and red colors to the left.
Adjust while observing the center of the picture.
i Adjust the vertical convergence.
V-STAT Press ADJUST
+ to move blue colors upward and red colors downward.
Press
ADJUST-to move blue colors downward and red colors upward.
I Adjust while observing the center of the picture.
The indicator blinks when .....
The limit value is achieved by pressing ADJUST+ or -.
-11-

GOM-2036S
When Adjustment Is Completed (Storing
the Adjusted Condition)
When step 3 (on page 10) is completed, the adjusted display condition is stored in
memory under the following conditions:
• When you select another adjustment item by pressing the SELECT button.
• When 5 seconds have elapsed after adjustment and the -'0: indicator is lit.
The upper 4 adjustment items listed below are stored for each different input signal
of
up to 15 types.
The lower 4 adjustment items are stored independently from the types
of input
signals.
Adjustment item How stored
H-SIZE They are stored together with the type of the
(horizontal size) input signal.
H-CENT The adjusted condition for up to 15 different input
(horizontal position) signals can be stored.
V-SIZE The stored condition is called back from memory
(vertical size) when the corresponding signal is input, and the
V-CENT optimum display is obtained for this signal.
(vertical centering)
()
(contrast) They are stored independently from the input
-f:/-
(brightness) signal.
H-STAT Normally adjust the convergence when red and
(horizontal static blue colors are shifted due to the direction of the
convergence) unit, or by being affected by the terrestrial
V-STAT magnetism.
(vertical static convergence)
When the 16th condition is stored
The condition stored first is replaced by the 16th.
Care should be taken when a number of different conditions are to be stored.
If you modify the condition for the preset-type models
It also will be stored in memory. When called back from memory, priority is given to
the modified condition. When the stored conditions are cleared, the factory-preset
conditions return.
-12-

GDM·2036S ~
How to Clear Every User-Stored Condition in the Memory
Iil!Q1ttm·
,
When every condition is cleared
The following two methods can be used to clear every stored condition at once.
(The factory-preset conditions will not be cleared however.)
Clear them when you want to erase unnecessary conditions from memory and store
only the necessary conditions again.
Turn off the power and turn it on again while pressing the ADJUST
+ and -buttons
simultaneously.
trK~wI
~~
()
......
Press the RESET button at the rear with the tip of a ball-point pen or a similar object
while the power is turned on
..
RESET
The 7 indicators light up at the same time (for about 0.25 seconds), and the (:
(contrast) •. :2.. (brightness). H-STAT. and V-STAT also return to their factory-preset
conditions.
-13-

GDM-2036S
Numbers in circles present procedure to do
SECTION 2
DISASSEMBLY
2-1.
REAR
CABINET
AND
TOP
COVER
REMOVAL
.@
four screws
(BVTPM4
x
8)
@
Remove the
top
cover
in the arrow
2-2.
H-STAT
VR
AND
FOCUS
PACK
REMOVAL
~
CD
tow screws
?'"
(BVTP4
x
6)
®
Remove the rear cabinet
®
pull out
the
grommet
@
Removethe
H.STATVR
@
Removethe
Focus
Pack
(1-238-745-21)
CD
two screws
(BVTP M4
x
8)
~
_00000
000---
000
00
00
g
~~_g
I
o_~·--
___
°0
0 I
___
--
00
go
0 I
00
g:~-
-14-
®
shield panel

2-3. BEZEL REMOVAL
2-4. H4 BOARD REMOVAL
attention
<D two connectors
(Hl, H2)
@ Remove the bezel
-15-
GDM-2036S
<D four screws (Hex. Head, 5 X 25)

GDM-2036S
2-5. POWER SWITCH REMOVAL
@ Remove the powerswitch.
2-6. A, B1, C AND M1 BOARD REMOVAL
<D ABC Shield
-16-
<D connector (G-3)
@ Remove the A board in the
arrow ®direction while
push two claws.
@ B1 board

GDM-2036S ~
I
I
2-7. G BOARD (SWITCHING REGULATOR) REMOVAL ® shield
@ two screws
~
I
2-8. N BOARD REMOVAL
@ G board
® four connectors
(G3 -G6)
@ Remove the N board
in the arrow.
-17-
<D three screws
(M 4 x 8)
@ Remove the G board
(Switching regulator)
in the
arrow ® direction.
<D two screws
(BVTP3 x 8)
7)
@ Open the side cover.

GDM-2036S
2-9. D3 BOARD SERVICE POSITION
® Pull out 03 board and in stall
it in the arrow ®direction
(03 board can hang to video shield)
Note: Before pulling out D3 board, remove five dampers
showed in 2-11-3 and 2-11-4 (Q)-@)
• D3 board Bracket Removal
<D three screws
(BVTP 3 X 8)-~ ..,
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<D Pull up the side cover
in the arrow ®direction

2-10. PICTURE TUBE REMOVAL
@ anode cap
• REMOVAL OF ANODE-CAP
• REMOVING PROCEDURES
<D Turn up one side of the rubber cap in the
direction indicated by the arrow ®.
• HOW TO HANDLE AN ANODE-CAP
<D Don't damage the surface of anode-
cap with sharp objects.
@ Don't press the rubber too hard or
you may
damage the inside of the
anode-cap I
A metal fitting
called a shatter-hook
terminal is built into the rubber.
<ID Don't tum the foot of the rubber
over too hard I
The shatter-hook terminal will stick
out and may damage the rubber.
@ towscrews
(TA 5 x 20)
@ towscrews
(TA5 x 20)
GDM-2036S
ill ABC shield
® Cboard
® neckA'ssy
(J) deflection yoke
® picture tube
@ Using a thumb pull up the rubber cap
firmly in the direction indicated by the
arrow@.
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Anode button
<ID 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-2036S
2-11. WIRING HARNESS LAYOUT
2-11-1. A, B1, C AND M1 BOARD
o 0
D
o
O®
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