Sampo SME-32DL5 User manual

34“ MULTIMEDIA MONITOR
SERVICE MANUAL
MODEL：
：：
：SME-32DL5(P)
MMM-0023
VER1.0

If having any changes, do not do advanced advice.
VER1.0
CONTENTS
1. IMPORTANT SAFETY PRECAUTIONS......... 1-1
2. BLOCK DIAGRAM........................................... 2-1
3. FACTORY & ELECTRONIC ADJUSTMENT... 3-1
4. TROUBLE SHOOTING GUIDES.............….... 4-1
5. SPECIFICATION......................................…... 5-1
6. EXPLODED VIEW.....................................…. 6-1
7. P.C. BOARD TOP VIEW ............................... 7-1
8. SCHEMATIC DIAGRAM................................ 8-1
9. ELECTRONIC PARTS LIST.......................... 9-1

If having any changes, do not do advanced advice.
10.DEFECT BAR CODE LIST….………………10-1
11.PACKING OF THE SET……………………..11-1

SAFETYPRECAUTIONS VER1.0
1-1
1. Before returning an instrument to the
customer, always make a safety check of the
entire instrument, including, but not limited to,
the following items.
a. Be sure that no built-in protective devices are
defective and/or have been defeated during
servicing. (1) Protective shields are provided on
this chassis to protect both the technician and
the customer. Correctly replace all missing
protective shields, including any removed for
servicing convenience. (2) When reinstalling the
chassis and/or other assembly in the cabinet,
be sure to put back in place all protective
devices, including, but not limited to,
nonmetallic control knobs, insulating fishpapers,
adjustment and compartment covers/shields,
and isolation resistor/capacitor networks. Do
not operate this instrument or permit it to be
operated without all protective devices
correctly installed and functioning.
b. Be sure that there are no cabinet openings
through which an adult or child might be able
to insert their fingers and contact a hazardous
voltage, Such opening include, but are not
limited to, (1) spacing between the picture
tube and the cabinet mask, (2) excessively
wide cabinet ventilation slots, and (3) an
improperly fitted and/or incorrectly secured
cabinet back cover.
c. Leakage Current Hot Check —
——
—With the
instrument completely reassembled, plug the
AC line cord directly into a 120V AC outlet. (Do
not use an isolation transformer during this test.)
Use a leakage current tester or a metering
system that complies with American National
Standards Institutes (ANSI) C101.1 Leakage
Current for Appliances and Underwriters
Laboratories (UL) 478. With the instrument AC
switch first in the ON position and then in the
OFF position, measure from a known earth
ground (metal waterpipe, conduit, etc.) to all
exposed metal parts of the instrument
(antennas, handle bracket, metal cabinet,
screwheads, metallic overlays, control shafts,
etc.), especially any exposed metal parts that
offer an electrical return path to the chassis.
Any current measured must not exceed 3.5
milliamp. Reverse the instrument power cord
plug in the outlet and repeat test. ANY
MEASUREMENTS NOT WITHIN THE LIMITS
SPECIFIED HEREIN INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE
ELIMINATED BEFORE RETURNING THE
INSTRUMENT TO THE CUSTOMER.
2. Read and comply with all caution and
safety-related notes on or inside the Monitor
cabinet, on the Projection Monitor chassis, or
on the picture tube.
3. Design Alteration Warning—
——
—Do not alter or
add to the mechanical or electrical design of
this unit. Design alterations and additions,
including, but not limited to, circuit
modifications and the addition of the items such
as auxiliary audio and/or video output
connections might alter the safety
characteristics of this Projection Monitor and
create a hazard to the user. Any design
alterations or additions will void the
manufacturer’s warranty and will make you, the
service, responsible for personal injury or
property damage resulting therefrom.
4. Hot Chassis Warning —
——
—a. Some Monitor
chassis are electrically connected directly to
one conductor of the AC power cord and may
be safely serviced without an isolation
transformer only if the AC power plug is
inserted so that the chassis is connected to the
ground side of the AC power source. To
confirm that the AC power plug is inserted
correctly, with an AC voltmeter measure
between the chassis and a known earth ground.
If a voltage reading in excess of 1.0V is
obtained, remove and reinsert the AC power
plug in opposite polarity and again measure the
voltage potential between the chassis and a
DEVICE
UNDER
TEST
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
TEST ALL
EXPOSED METAL
SURFACES
LEAKAGE
CURRENT
TESTER
+ -
EARTH
GROUND
3. WIRE CORD
A
C Leaka
g
e Test (READING
SHOULD NOR
BE ABOVE
3.5mA)

SAFETYPRECAUTIONS VER1.0
1-2
known earth ground. b. Some Monitor chassis
normally have 85V AC (RMS.), between
chassis and earth ground regardless of the AC
plug polarity. These chassis can be safely
serviced only with an isolation transformer
inserted in the power line between the receiver
and the AC power source, for both personnel
and test equipment protection. c. Some
Projection Monitor chassis have a secondary
ground systems in addition to the main chassis
ground. This secondary ground system is not
isolated from the AC power line. The two
ground system are electrically separated by
insulating material that must not be defeated or
altered.
5. Observe original lead dress. Take extra care
to assure correct lead dress in the following
areas: a. near sharp edges, b. near thermally
hot parts—be sure that leads and components
do not touch thermally hot parts, c. the AC
supply, d. high voltage, e. antenna wiring.
Always inspect in all areas for pinched,
out-of-place, or frayed wiring. Do not change
spacing between components, and between
components and the printed-circuit board.
Check AC power cord for damage.
6. Components, parts, and/or wiring that appear
to have overheated or are otherwise damaged
should be replaced with components, parts, or
wireing that meet original specifications.
Additionally, determine the cause of
overheating and/or damage and, if necessary,
take corrective action to remove any potential
safety hazard.
7. PRODUCT SAFETY NOTICE—
——
—Many Monitor
electrical and mechanical parts have special
safety-related characteristics some of which are
often not evident from visual inspection, nor
can the protection they give necessarily be
obtained by replacing them with components
rated for higher voltage, wattage, etc. Parts that
have special safety characteristics are
identified in this service data by shading with a
mark on schematics and by shading or a
mark in the parts list. Use of a substitute
replacement part that does not have the same
safety characteristics as the recommended
replacement part in this service data parts list
might create shock, fire, and/or other hazards.

BLOCKDIAGRAMVER1.0
2-1
Total block diagram
L◎
R◎
V◎
AV1
L◎
R◎
V◎
AV2
L◎
R◎
V◎
AV
OUT
S
I/P
RGB
I/P
DEF.
BLOCK
AUX
POWER
POWER
○
○
○
AC
LINE
H
V
AV
BLOCK
RL
L
V
R
PHONE
TDA2616
SOUND
AMP
TA8184
SOUND
CONTROL
CRT
AMP CRT
R
B
G
YCBCR
R◎
L◎
AV3

BLOCKDIAGRAMVER1.0
2-2
Monitor DEF. & CRT AMP block diagram
Main Board
si
g
nals out
p
ut
R
B
G
H
V
PC87C380
IC001
TDA4854
(DEF.IC)
IC691
IIC BUS
H
V RGB/TV
Dynamic Focus:IC6C1
74HC221:IC631
AMP/DAMP:Q601,T601
Sidepin:Q6I1,6I2,L6I1
V0
V2
V1
SB
SB1
H-size
DC-converter:T604,Q6D4
AMP/DAMP:Q6C9,C6D2
V-AMP TDA8351:IC501
FBT
T6C2
Cs linear
C608,609,L601,602
LM358
IC632 3843 IC661 DC converter IRF740:T604
H-DEF Feedback
R674,675,676
H.V. Feedback
FOCUS
H.V. 31KV
MAIN
BOARD
POWER
CIRCUIT
210V
28V
190V
13V
19V
6.3V
AC IN
Sub power and
Sound board
TDA4885: IC901 AMP:Q903,905,907
CRT BOARD
H-YOKE
V-YOKE
H.V.
CRT
C
O
N
T
R
O
L
B
U
S
H.V.
H
V
H
V
R
L

BLOCKDIAGRAMVER1.0
2-3
Main power supply & Aux. power & sound AMP block diagram
AC
Input EMI Filter
T702,T703
DEGA
IC713
Bridge &
Rectifier
BR701
Low Voltage
Protection
Q711,Q712,Q713
PWM IC
IC711
DC Switch
IC716~D788
T781
Rectifier & Filter:IC781
Rectifier & Filter:D790
Rectifier & Filter:D789 30V
Stand by +5V
Stand by +12V
X‘ FMR
T701
Protect Rectifier & Filter:D757
Rectifier & Filter:D755
Rectifier & Filter:D756
Rectifier & Filter:D759
Rectifier & Filter:D753
6.3V (0.63A)
SB1 CPU pin20
19V (0.4A)
13V (0.4A)
28V (0.2A)
210V (0.6A)
TA8184
IC301
R
L Pre-AMP
IC302~309 AMP TDA2616 IC311
TO CPU
Sound
Sound control
Rectifier & Filter:L751 190V (0.11A)
Sevices Regulator
Feedback
Network
IC712 SB CPU pin28
SPEAKERS

BLOCKDIAGRAMVER1.0
2-4
AV. Board
AV1
AV2
RGB
I/P
S
I/P
AV OUT
AV
SWITCH
IC806
IC807
TC9090AN
V
IC801
TB1276AN
SOUND
BLOCK
See Pa
g
e5
Sound
(
R
)
Sound
(
L
)
5V
9V
R/G/B/H/V
(
VGA
)
R
H
to Main board
to CPU
G
B
V
R
L
V
R
L
V
R
L
C
Y
VIDEO
SWITCH
IC803
YCBCR YUV

FACTORY&ELECTRONICADJUSTMENT VER1.0
3-1
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE
“X-RAY RADIATION PRECAUTION”, “SAFETY PRECAUTION”
AND “PRODUCT SAFETY NOTICE” ON PAGE 1 AND 2 OF THIS
MANUAL.
SET-UP ADJUSTMENT
zThe following adjustments should be made when a complete realignment is required or a new
picture tube is installed.
Perform the adjustments in order as follows :
1. Purity
2. Distortion (Vertical) balance
3. Convergence
4. Focus
Note: The PURITY/CONVERGENCE MAGNET assembly and rubber wedges need mechanical
positioning.
PART DESCRIPTION PART NO.
CPT Picture tube, M81AHM50X01 VBM81AHM50X01
DY Deflection yoke, YS-70840 RDY-N1004-1----
40MAX
90MAX
PURITY/
CONVERGENCE
MAGNET ASS‘Y
(CPM)
DEFLECTION
YOKE
(DY)
1
2
3
2
DEFLECTIO
N YOKE
(DY)
ADHESIVE
(Silicon)
RUBBER WEDGE
(
Ta
p
e
)

FACTORY&ELECTRONICADJUSTMENT VER1.0
3-2
PURITY ADJUSTMENT
NOTE: Before attempting any PURITY ADJUSTMENTS, the receiver should be operated for at least
30 minutes at White Rasher.
1. Demagnetize the picture tube and cabinet using a degaussing coil. (East direction)
2. Slowly move the DY forward or backward with moving 2 pole magnet of CPM until Green beam
registration rank “a” is become
Tighten the clamp screw of the DY with correct rasher-rotation.
■DISTORTION (VERTICAL) BALANCE ADJUSTMENT
Tilt front of DY up or down to obtain best balance of Top and Bottom distortion.
■CONVERGENCE ADJUSTMENT
NOTE: Before attempting any convergence adjustment the receiver should be operated for at least 15
minutes.
1.Pan front of DY right or left to obtain better convergence of Yv (R or B wide pattern), and put d
dd
d
WEDGE into right and left space with temporary Mounting WEDGE.
B
B
R
R
Registration Rank Rasher-rotation
a a
60mm
+0.74
1 dot
Face to south
-0.74
1 dot

FACTORY&ELECTRONICADJUSTMENT VER1.0
3-3
2. Xv misconvergence adjustment:
Adjust the Xv coil (on the deflection yoke) to correct misconvergence at both sides on screen. (See
the figure below.)
Use a hexagonal tip stick (plastic) to adjust the core of coil.
3. Center convergence adjustment
1) Receive crosshatch pattern from a color
bar/pattern generator.
2) Adjust the BRIGHTNESS and CONTRAST
Controls for well defined pattern.
3) Adjust two tabs of the 4-Pole Magnets to
change the angle between them (See figure
3.) and superimpose red and blue vertical
lines in the center area of the picture
screen.(See figure 4.)
4) Turn the both tabs at the same time keeping
the constant angle to superimpose red and
blue horizontal lines at the center of the
screen. (See figure 4)
5) Adjust tow tabs of 6-Pole Magnets to
superimpose red/blue line with green one.
Adjusting the angle affects the vertical
lines and rotating both magnets affects
the horizontal lines.
6) Repeat adjustments 3, 4, 5 keeping in
mind red, green and blue movement,
because 4-Pole Magnets and 6-Pole
magnets interact and make dot movement
complex.
R B
B R
B R
R B
Xv Cross Pattern View
Clockwise Counterclockwise
Center Convergence by Convergence Magnets
Figure 4.
BLUE RED
BLUE
RED
4-POLE MAGNETS
MOVEMENT
RED/BLUE GRN
RED/BLUE
GRN
6-POLE MAGNETS
MOVEMENT
ADJUST THE ANGLE
(
VERTICAL LINES
)
ROTATE TWO TABS
AT THE SAME TIME
(
HORIZONTAL LINES
)
FIXED
A
DJUSTMENT OF MAGNETS
Figure 3.

FACTORY&ELECTRONICADJUSTMENT VER1.0
3-4
4. Corner convergence adjustment:
When the misconvergence is still
evident on corners even though the
above adjustment is done, use the
ferrite sheet to correct
misconvergence.
Put ferrite sheets into the space under the
yoke. Decide such position that
misconvergence becomes minimum,
watching picture screen. (See figure
below.)
Remove cover paper of ferrite sheet to
stick it in the place on the tube. Put
adhesive tapes on ferrite sheets to fix.
■FOCUS ADJUSTMENT
1. Select the RGB mode.
2. Receive the “H” character signal from VGA signal
generator.
3. Adjust the FOCUS control (FBT) and DYNAMIC
FOCUS VR901 watching 4 corners for the best
performance of a “H” character.
4. Recheck overall convergence.
Ferrite
Sheets Ferrite
Sheet
For correcting misconvergence
on the position A
A

FACTORYADJUSTEDMETHODANDORDER VER
1.0
3-5
A. The entry method for factory setting item.
1. Push the factory setting button on the R/C to go to factory setting mode.
2. When the monitor set is in “on”condition, pull the AC cord away. Then push the POWER SW
continuously and insert the AC cord again. Do not release the POWER SW until the screen appear
raster. When the above steps completed, it is in factory setting mode.
B. The selecting items of factory setting.
1. W-BALANCE ADJ. (white balance adjustment)
2. GEOMETRY ADJ. (geometry adjustment)
3. CHECK (factory check. It work for AV‘s function check)
4. AUTO RUN ( No use )
5. MTS SET
6. MMM SET
note: (1) Use the MENU +/- button to entry the desired selecting item.
(2) Use the ADJ. +/- button to entry this selected item
(3) Then use MENU +/- button again to select the adjusting items)
note: Only the item 1 and 2 of the factory adjustment are used to adjust. The No. 3 item are used as the factory
check.
W-BALANCE ADJ. (white balance adjusting method)
A. R.G.B.-BLACKLEVEL...................... black level adjusting of white balance
B. R.G.B.-GAIN..................................... white level adjusting of white balance
C. SUB-CONT-RGB
D. SUB-CONT-AV
E. SUB-TINT-AV
F. SUB-COLOR-AV
G. SUB-TINT YCBCR
Step:
1. Set the BRIGHTNESS & CONTRAST at MAX.
2. Adjust the R.G.B.-BLACKLEVEL to min.
3. Do not adjust the background color. Then adjust the other two color to reach the standard color
temperature (adjust the SCREEN VR at the same time)
4. Adjust R.B.-GAIN (G-GAIN fix at 150 to 180) to let the “x”, “y”value reach the standard color
temperature. (forget the Y value preferential)
5. Adjust the SUB-CONT-RGB to let the “Y”value reach the standard value
6. Repeat item 1. to 3. to check the color temperature value of black level.
The standard color temperature.
Black level x: 270 y: 270 Y: 0.45FL
White level x: 270 y: 270 Y: 85FL
(100% Center block)

FACTORYADJUSTEDMETHODANDORDER VER
1.0
3-6
GEOMETRY-ADJ. ITEM
ADJ. MIN. MAX.
H CORNER H corner adjustment
MENU+ (STDandCHG)
H-PIN-BALANCE H pincushion balance
adjustment
V-LINEARITY V linearity adjustment
V-LIN-BALANCE V linearity balance adjustment
PINCUSHION pincushion size adjustment
( STD and CHG )
TRAPEZOID trapezoid adjustment
( STD and CHG )
PARALLELOGRAM parallelogram adjustment
( STD and CHG )
V-SIZE V size adjustment
V-CENTER V center adjustment center
point
H-WIDTH H width adjustment
( STD and CHG )
H-PHASE H phase adjustment
Center point
Rotation Rotation adjustment
L BLK Left Half Blanking Adjustment
( this function no use )
R BLK Right Half Blanking Adjustment
( this function no use )
The standard size.
H-Size: 620mm
V-Size: 465mm
MENU -

SERVICEMODEADJUSTMENT VER1.0
3-7
(1) RGB MODE
ITEM ADJUSTMENT PROCEDURE.
1. adjustment
(VR731)
1. Set to RGB mode.
2. Receive all white pattern (H:31.47K V:60Hz 640X480
mode).
3. Connect DC Volt-meter between cathode of D753 and
ground.
4. Adjust VR731 for 210V±
±±
±0.5V output.
2. High voltage adjustment
(VR691)
1. Connect HV meter.
2. Set to RGB mode. (H:31.47K V:60Hz 640X480 mode).
3. Receive CROSS HATCH pattern.
4. Set contrast and bright to standard.(Recall value)
5. Adjust VR691 to let the high voltage be 31±
±±
±0.5KV.
3. H-Center adjustment
(VR601)
1. Set to RGB mode.
2. Receive CROSS HATCH pattern (H:43.27K V:85Hz 640X480
mode).
3. Adjust VR601 to let the raster be located at center of CRT.
4. Trapezoid adjustment
(under factory adjustment mode)
1. Set to RGB mode.(have nine mode)
2. Receive CROSS HATCH pattern
3. Entry the second item of factory adjustment.
4. Find the trapezoid item and adjust the trapezoid to be
best.
5. Geometry adjustment
(under factory adjustment mode)
1. Set to RGB mode. .(have nine mode)
2. Receive CROSS HATCH pattern
3. Entry the item 2 of factory setting to select parallelogram
item to adjust the parallelogram to be best.
6. V-Linear adjustment
(under factory adjustment mode)
1. Set to RGB mode.
2. Receive CROSS HATCH pattern (H:31.47K V:60Hz 640X480
mode).
3. Entry item 2 and find V-Linearity adjustment of factory
setting to adjust the V-linearity to be best.
7. H-size adjustment (RGB mode)
(under factory adjustment mode)
1. Set to RGB mode.
2. Receive CROSS HATCH pattern (we have nine main
modes, please see the specification of CHROMA-2135
generator pattern).
3. Entry the factory adjustment item 2 to choice the H-size
adjustment.
4. Use the adjustment to let the H-size meet the specification
( 620mm for all main modes )

SERVICEMODEADJUSTMENT VER1.0
3-8

SERVICEMODEADJUSTMENT VER1.0
3-9
ITEM ADJUSTMENT PROCEDURE.
8. V-size adjustment (RGB mode)
(under factory adjustment mode)
1. Set to RGB mode.
2. Receive CROSS HATCH pattern (we have nine main
modes, please see the specification of CHROMA-2135
generator pattern).
3. Entry the factory adjustment item 2 to choice the V-size
adjustment.
4. Use the adjustment to let the V-size meet the specification
( 465mm for all main modes )
9. Focus adjustment
(VR901, FOCUS)
1. Set to RGB mode.
2. Receive H or @ pattern (H:37.8K V:72Hz 640X480 mode) or
whole letter Picture.
3. Adjust VR901 on CRT PWB and FOCUS VR of FBT to let
the picture clear both at center and corner.
10. White balance adjustment
(under factory adjustment mode)
1. Set to RGB mode. (H:31.47K V:60Hz 640X480 mode).
2. Receive back ground pattern (no Video Signal).
3. Press MENU key to select bright function and set bright
function to max. by pressing “+” key on remote control or
volume “+” key front panel. Then press MENU key again
to select contrast function. And set contrast function to
max. by pressing “+” key on remote control or volume “+”
key front panel.
4. Entry the item 1 of factory setting to adjust RGB-BLK
LEVEL and let R.G.B.-BLK LEVEL are all minimum.
5. Adjust SCREEN VR to let the picture just bright. At this
time the screen appears only one color of R or G or B. The
BIAS of this color does not do any adjustment.
6. Use CA-100 to measure the color temperature.
7. Adjust the R.G.B. BLACK LEVEL of the other two color to
let x=270, y=270.
8. Receive BLACK pattern. And adjust SCREEN VR to let
Y=0.45±
±±
±0.2FL
9. Receive center white window single.
10. G-Gain fix in 150 to 180 and adjust R-Gain and B-Gain to
let x=270±
±±
±5, y=270±
±±
±5
11. Adjust contrast (Sub-CONT-RGB) to let Y=85FL±
±±
±2FL.

SERVICEMODEADJUSTMENT VER1.0
3-10
(2) AV MODE
ITEM ADJUSTMENT PROCEDURE
1 H-size adjustment (AV mode)
(under factory adjustment mode)
1. Set the AV mode (AV1).
2. Receive Lion pattern.
54321 12345
digital test pattern→
→→
→Lion pattern
3. The item 2 of factory setting is to adjust H-size.
4. Adjust H-Steps to be 5±
±±
±0.5 .
2 V-size adjustment (AV mode)
(under factory adjustment mode)
1. Press INPUT key to select AV1.
2. Receive Lion pattern for AV1. (fig-1)
3. Go to the item 2 of factory setting is to adjust V-Size.
4. Adjust V-Steps to be 4±
±±
±0.5 .
3 Sub-Tint (Sub-Tint-AV)
1. Set the AV Mode(AV1)
2. Receive Color Bar pattern with 8 steps.
3. Connect the scope to Q813 Emitter.
4. Go to the factory setting. Select the Sub-Tint to adjust the
Sub-Tint to be as follow.
5. Let the below edge of step 2 and above edge of step 3 at
the same level.
4 SUB Contrast ( Sub-CONT-AV)
(Test point : B out ( Q813 “C”)
1. Set the AV Mode (AV1)
2. Receive gray scale pattern with 8 steps. (no color)
3. Connect the scope to Q813 Emitter.
4. Go to the factory setting. Select the Sub-Contract (AV) to
adjust the Sub-Contract (AV) to be as follow.
0.95Vp-p
1 2 3 4
Sub-Tint
V-steps
H-steps
(fig-1)

SERVICEMODEADJUSTMENT VER1.0
3-11
5 SUB Color ( Sub-Color-AV)
(Test point : B out ( Q813 “C”)
1. Set the AV Mode (AV1)
2. Receive Color Bar pattern .
3. Go to the factory setting. Select the Sub-Color-AV to
adjust the Sub-Color to be as follow.
(3) YCBCR MODE
ITEM Adjustment Procedure
1. Sub-Tint ( Sub-Tint YCBCR)
1. Set the YCBCR Mode
2. Receive Color Bar pattern with 8 steps.
3. Go to the factory setting. Select the Sub-Tint-YCBCR to
adjust the Sub-Tint to be as follow.
4. Let the below edge of step 2 and above edge of step 3 at
the same level.
0.85Vp-p
1 2 3 4
Sub-Tint