TOSHIBA 29SH9UH, 34SH9UH Service manual
SERVICE MANUAL
Color Television
29SH9UH
FILE NO. 010-200317
F2DS Chassis
34SH9UH
Jan., 2004
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS ........................................................................................................................................ 3
SET-UP ADJUSTMENT ............................................................................................................................................ 4
SERVICE MODE ...................................................................................................................................................... 6
DESIGN MODE ........................................................................................................................................................ 9
ELECTRICAL ADJUSTMENTS .............................................................................................................................. 10
CIRCUIT CHECK ....................................................................................................................................................12
GENERAL ADJUSTMENTS
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA .............................................................................................................................. 13
LOCATION OF CONTROLS ................................................................................................................................... 14
PROGRAMMING CHANNEL MEMORY ................................................................................................................. 16
CHASSIS AND CABINET REPLACEMENT PARTS LIST ......................................................................................18
PC BOARDS BOTTOM VIEW................................................................................................................................. 33
TERMINAL VIEW OF TRANSISTORS ................................................................................................................... 45
CIRCUIT BLOCK DIAGRAM .................................................................................................................................. 47
TABLE OF CONTENTS
SPECIFIC INFORMATIONS
SPECIFICATIONS .............................................................................................................................................. END
APPENDIX:
CIRCUIT DIAGRAM
– 2 –
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU-
TION” AND “PRODUCT SAFETY NOTICE” INSTRUCTIONS BELOW.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous
X-RAY RADIATION. To avoid such hazards, the high voltage must not be above the specified limit. The nominal value
of the high voltage of this receiver is (A) kV at zero beam
current (minimum brightness) under a (C) V AC power source.
The high voltage must not, under any circumstances, exceed (B) kV.
Refer to table-1 for high voltage (A), (B) & AC voltage (C).
(See SETTING & ADJUSTING DATA on page 13)
Each time a receiver requires servicing, the high voltage
should be checked following the HIGH VOLTAGE CHECK
procedure in this manual. It is recommended that the reading of the high voltage be recorded as a part of the service
record. It is important to use an accurate and reliable high
voltage meter.
SAFETY PRECAUTION
WARNING : Service should not be attempted by anyone unfamiliar with the necessary precautions on this receiver. The following
are the necessary precautions to be observed before servicing this chassis.
1. An isolation transformer should be connected in the power line between the receiver and the AC line before any service is
performed on the receiver.
2. Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube
is highly evacuated and if broken, glass fragments will be violently expelled. Use shatter proof goggles and keep picture tube
away from the unprotected body while handling.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as; nonmetallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.
2. The only source of X-RAY RADIATION in this TV receiver
is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same
type tube as specified in the parts list.
3. Some part in this receiver have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, parts replacement should be undertaken only
after referring to the PRODUCT SAFETY NOTICE below.
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are
often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by
the international hazard symbols on the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement
parts which do not have the same safety characteristics as specified in the parts list may create shock, fire, X-ray
radiation or other hazards.
– 3 –
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU-
TION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF SERVICE MANUAL.
SET-UP ADJUSTMENT (FOR FLAT TUBE)
■ 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. Color Purity
2. Convergence
3. White Balance
Note: The PURITY/CONVERGENCE MAGNET assembly and rubber wedges need mechanical positioning.
Refer to figure 1.
COLOR PURITY ADUSTMENT
GENERAL ADJUSTMENTS
(1) Let the screen face in the installing direction or toward the east (when it is to be moved), bring up the service mode
screen after demagnetizing (front, left, right, and top) with the degaussing coil, receive white signals by pressing the [TV/
VIDEO] button, and then the receiver should be operated for more than 40 minutes.
(2) Perform rough adjustment of the central convergence with the P/C magnet according to the adjustment item.
(3) Receive built-in green signals, loosen set screws on the deflection yoke, remove rubber wedges, and shift the deflection
yoke to toward front.
(4) Move alternately the two 2-pole magnets of the P/C magnets so that the green raster can come to the center of the
screen.
Figure 1.
2-pole purity magnet
(27": Magnet is fixed with deflection yoke.)
SPECIFIC INFORMATIONS
Green Belt
Sub-4-pole convergence magnet (32" : 34")
Sub-4-pole convergence magnet (to be installed on deflection yoke for 30", 32”)
Main 4-pole convergence magnet (30" : 32")
6-pole convergence magnet (34")
6-pole convergence magnet (30" : 32")
Main 4-pole convergence magnet (34")
P/C magnet installing position A
• 30"=26.5 mm
A
• 32"=30.5 mm or 32.5 mm
• 34"=37 mm
• 34"=39 mm
(5) Receive built-in red and blue signals, check that there is no inclination of the single color raster toward one side, and if
each color tilts to a great extent, make adjustment with the 2-pole magnet so that the 3 colors will come to the center
evenly.
(6) Receive the green raster, shift the deflection yoke
from a foremost position (hitting against the picture
Shift deflection yoke
(7) Perform marking of each point
(6)
(8)
on the tape of picture tube
tube) to a backward position horizontally, stop the
deflection yoke at a position where it begins to
become a green raster, and perform accurate marking
on the picture tube.
Picture tube
CRT-D board
(7) Shift the deflection yoke further backward, and
perform accurate marking at a position where the
green raster begins to being luck.
(8) Fix the deflection yoke at a position 60% forward
within the range marked in items (6) and (7) above.
100 60 0%
Fix the deflection yoke at a position 60% forward from a
point between (6) and (7)
P/C Mag
CONVERGENCE ADJUSTMENTS
* Adjust the convergence magnet to get vest convergence in the the order to (1) ~ (5).
■ CENTER CONVERGENCE:
(1) Receive the white crosshatch or dot pattern from the service signal generator.
(2) Use the 2 pieces of main 4-pole magnets of P/C magnets, change the open angle, and align the red and blue vertical
lines on the screen center.
(3) Freeze the open angle of the main 4-pole magnets, turn them simultaneously, and align the horizontal lines.
(4) Take the same steps for items (2) and (3) above and align red/blue with green on the screen center using two 6-pole
magnets.
– 4 –
(5)Adjust the sub-4-pole magnets only in case there is any deviation of Xv bow-shaped convergence. (To be usually set at
the initial position)
Align both sides with the sub-4-pole magnets and minimize the deviation of blue and red with the main 4-pole magnets.
blue
blue
red
red
Main 4-pole magnet
red/blue
red/blue
green
6-pole magnet
■ CIRCUMFERENCE CONVERGENCE:
Perform correction in the following manner.
*
blue
green
red
A
B
C
(Parts code:23 948 274) TC-S
blue
green
red
S
N
Blue color or blue mark
D
E
F
*Insert the correction piece between the
picture tube and the deflection yoke.
Bonded surface
(Insertion position of correction
piece)
D
E
F
A
B
C
Adjust VR 1 and minimize the deviation of YH. *Only 27", 30" and 32".
Red
green
blue
blue
green
Red
Xv bow-shaped deviation of convergence
blue
green
red
Sub-4-pole magnet
• Adjust coils and minimize deviation
(The 27” unit has coils underneath it)
A
B
C
■ 30", 27", 32"
blue
green
red
(Parts code:23 948 464)
N
S
Transparent
D
E
F
Bonded surface
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
Red
green
blue
blue
green
Red
Adjust VR 2 (YHC) and minimize the deviation of YH.
Red
blue
green
green
blue
Red
blue
Red
green
green
Red
blue
Adjust VR 3 (YV) and minimize the deviation of YV.
Red
green
blue
blue
green
Red
GH
Red
blue
green
green
blue
red
green
blue
red
blue
green
Red
Red
green
blue
green
Red
blue
VR3
VR2 VR1
■ 34"
YV YHC
27" (Part No. 23 947 371)
32", 30" (Part No. 23 947 121)
34" (Part No. 23 993 080)
GH
Perform correction by inserting the
correction piece into the clearance of terminal board coils of
the deflection yoke.
Note:
Perform insertion by turning the
metal side to the terminal board
side of the deflection yoke.
– 5 –
1. ENTERING TO SERVICE MODE
1) Press o button once on
Remote Control.
SERVICE MODE
2) Press o button again to
keep pressing.
3) While pressing the o button,
press MENU button on TV set.
(or SOUND MUTE)
GENERAL ADJUSTMENTS
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Service mode
S
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
SPECIFIC INFORMATIONS
A single horizontal line ON/OFF: - / - - button (on Remote) or a button (on TV)
Test signal selection : a button (on Remote)
Selection of the adjustment items : Channel s/t (on TV or Remote)
Change of the data value : Volume ; +/– (on TV or Remote)
Adjustment menu mode ON/OFF : MENU button (on TV)
Initialization of the memory (QA02) : CALL + Channel button on TV (s)
Reset the count of operating protect
circuit to “00”: CALL + Channel button on TV (t)
“RCUT” selection : 1 button
“GCUT” selection : 2 button
“BCUT” selection : 3 button
“CNTX” (or “SCNT”) selection : 4 button
“COLC” selection : 5 button
“TNTC” selection : 6 button
Test audio signal ON/OFF (1kHz) : 8 button
Self diagnostic display ON/OFF : 9 button
Press
Press
Adjustment mode
Item
Data
(Service mode display)
Item
Data
S
Color thickness correction
note: Displayed differently as shown below, de-
pending on the setting of the receiving color
system.
COLP (PAL)
COLC (NTSC)
COLS (SECAM)
CAUTION : Never try to perform initialization unless you have changed the memory IC.
– 6 –
4. SELECTING THE ADJUSTING ITEMS
1)Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2.
(t button for reverse order)
Refer to table-2 for preset data of adjustment mode.
(See SETTING & ADJUSTING DATA on page 13)
5. ADJUSTING THE DATA
1) Pressing of VOLUME ; +/– button will change the value of data in the range from 00H to FFH. The variable range
depends on the adjusting item.
6. EXIT FROM SERVICE MODE
1) Pressing POWER button to turn off the TV once.
■ INITIALIZATION OF MEMORY DATA OF QA02
After replacing QA02, the following initialization is required.
1. Enter the service mode, then select any register item.
2. Press and hold the CALL button on the Remote, then press the CHANNEL s button on the TV. The initialization of QA02 has
been complated.
3. Check the picture carefully. If necessary, adjust any adjustment item above.
Perform “Auto search Memory” on the owner’s manual.
CAUTION: Never attempt to initialize the data unless QA02 has been replaced.
7. TEST SIGNAL SELECTION
1) Every pressing of a button on the Remote Control changes the built-in test patterns on screen as described below
in SERVICE MODE.
GENERAL ADJUSTMENTS
Signal off
PAL signals (5 patterns)
The signals marked with are not usable to display in the Test signal for some model.
*
NTSC signals (5 patterns)
• Red raster
• Green raster
• Blue raster
• All White
• Black cross-hatch
Signals Picture
SPECIFIC INFORMATIONS
– 7 –
8. SELF DIAGNOSTIC FUNCTION
1) Press “9” button on Remote Control during display of adjustment menu in the service mode.
The diagnosis will begin to check if interface among IC’s are executed properly.
2) During diagnosis, the following displays are shown.
Indicated color of mode now selected : Green and Red
SELF CHECK
23xxxxxx
POWER
BUS CONT
BLOCK
S
: 000
: OK
: UV V1 V2 V3
V4
Indicated color of other modes : White
Green : Normal
Red : The microprocessor operates to provide judgement
of no video signal. The red color is still indicated
though the signal is input, failure may exist in input
signal line including QV01.
GENERAL ADJUSTMENTS
Part number of microprocessor (QA01)
Operation number of protecting circuit ----“00” is nor-
mal.
When indication is other than “00”, overcurrent apts to
flow, and circuit parts may possibly be damaged.
BUS CONT ----“OK” is normal.
When indication shows “Q uuu NG”, the device with
the number may possibly be damaged.
BLOCK
UV : TV reception mode
V1 : VIDEO 1 input mode (a1)
SPECIFIC INFORMATIONS
V2 : VIDEO 2 input mode (a2)
V3 : VIDEO 3 input mode (a3)
V4 : VIDEO 4 input mode (a4)
– 8 –
1. ENTERING TO DESIGN MODE
1) Select the Service mode.
DESIGN MODE
2) While pressing o(or CALL) button on
Remote and press MENU button on TV.
3) Press MENU button on TV.
S D
(Design mode) (Adjustment mode)
When QA02 is initialized, items “OPT0”, “OPT1”, “OPT2” and “OPT3” of DESIGN MODE are set to the data of the representative
model of this chassis family.
Therefore, because ON-SCREEN specification remains in the state of the representative of model. This model is required to
reset the data of items “OPT0”, “OPT1”, “OPT2” and “OPT3”.
2. SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL t button in the design mode changes the adjustment items in the order of table-3.
(s button for reverse order)
Refer to table-3 for data of design mode.
(See SETTING & ADJUSTING DATA on page 13)
3. ADJUSTING THE DATA
Pressing of VOLUME s or t button will change the value of data.
Press
Press
ITEM
DATA
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
– 9 –
ELECTRICAL ADJUSTMENTS
ITEM ADJUSTMENT PROCEDURE
FOCUS VR ADJ
SUB-BRIGHTNESS
(BRTC)
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
Note: Constrict the picture height
until the vertical retrace line
appears adjusting the item
HIT (HEIGHT).
HORIZONTAL POSITION
ADJUSTMENT (HPOS)
VERTICAL POSITION
ADJUSTMENT (VPOS)
1. Enter the service mode, then select any register item.
2. Press the TV/VIDEO button on the Remote until the black cross-bar pattern appears on the screen.
3. Adjust the FOCUS control (on T461) for well defined scanning lines on the picture
screen.
1. Set CONTRAST to minimum, and
BRIGHTNESS to center by adjusting user
controls.
2. Set the TV in service mode to get Black
cross-bar of inside pattern.
3. Select BRTC (brightness correction), and
adjust the ; – /+ button to reduce the
value so that white portion of inside pattern slightly light.
4. Adjust ; – /+ button to increase the data
value of BRTC, and set it just before the
difference between the belt of vertical retrace and the border of black portion of
inside pattern is visible.
After that, return vertical height and contrast.
1. Set the TV in service mode, and get
black cross-bar signal with VIDEO
button on remote hand unit.
2. Select either HPOS (Horizontal picture phase) or VPOS (Vertical picture
phase) with CHANNEL s, t buttons,
and adjust horizontal or vertical picture position in the center of screen
with VOLUME ; – /+ buttons.
Belt of vertical retrace
VERTICAL AMPLITUDE
ADJUSTMENT (HIT)
1. Set the TV in service mode, and get
black cross-hatch signal with VIDEO
button on remote hand unit.
2. Select HIT (Vertical amplitude) with
CHANNEL s, t buttons, and adjust
vertical amplitude with VOLUME
; – /+ buttons so that vertical amplitude lacks a little.
3. Adjust vertical amplitude with VOLUME ; – /+ buttons so that the first
bar on cross-hatch signal touches
edge of screen.
The first
– 10 –
ITEM ADJUSTMENT PROCEDURE
WIDTH
(WID)
E-W PARABOLA
(PARA)
WHITE BALANCE
ADJUSTMENT
CUTOFF ADJUSTMENT
•
(RCUT)
(GCUT)
(BCUT)
DRIVE ADJUSTMENT
•
(GDRV)
(BDRV)
1. Call up the adjustment mode display, then select the item WID.
2. Press the ; – /+ button to get the picture so the left and rightedges of raster
begins to lack.
3. Press the ; – /+ button to advance the data by 7 steps.
Note : Check the horizontal picture position is correct.
1. Call up the adjustment mode display, then select the item PARA.
2. Press the a button on Remote until the cross-hatch pattern appears on the screen.
3. Press the ; – /+ button to make vertical lines straight as shown below.
1. Set Contrast to 40, and brightness to +20 by picture control.
2. Receive the Black and White pattern.
3. Select RCUT, GCUT and BCUT with CHANNEL s, t buttons, to set individual
values to Initial reference data, and to set GDRV and BDRV to Initial reference
data with VOLUME ; – /+ buttons.
4. Press -/- - button on the remote control and rotate Screen VR to get one slight
horizontal line on screen.
Note: Every pressing of -/- - button provides Horizontal line picture and Normal
picture alternately.
5. Press -/- - button to release horizontal line picture, and select the two other colors
which did not light in the above step with CHANNEL s, t buttons. Then tap VOLUME ; – /+ buttons so that three colors slightly light in the same level.
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
X To correct white balance in light area,
select GDRV and BDRV with CHANNEL
s, t buttons to adjust.
X To correct white balance in dark area,
perform fine adjustment of RCUT, GCUT
and BCUT.
Light area check
(to show white)
Dark area check
(to show black)
– 11 –
CIRCUIT CHECK
HIGH VOLTAGE CHECK
CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps below.
1. Connect an accurate high voltage meter to the second anode of the picture tube.
2. Turn on the receiver. Set the BRIGHTNESS and CONTRAST controls to minimum (zero beam current).
3. High voltage must be measured below (B) kV.
Refer to table-1 for high voltage (B).
(See SETTING & ADJUSTING DATA on page 13)
4. Vary the BRIGHTNESS control to both extremes to be sure the high voltage does not exceed the limit under any conditions.
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
– 12 –
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA
SAFETY INSTRUCTIONS
HIGH VOLTAGE AT ZERO BEAM: (A) 32.8 kV 33.2 kV
MAX HIGH VOLTAGE:
AC VOLTAGE
Table-1
29" 34"
(B) 33.0 kV 35.0 kV
(C) 110~240 V 110~240 V
SERVICE MODE
ADJUSTING ITEMS AND DATAS IN THE SERVICE MODE:
29"
←
←
←
←
←
←
←
←
1CH
←
←
←
←
←
←
←
←
←
34"
←
←
←
←
←
←
←
←
1CH
←
←
←
←
←
←
←
←
←
Table-2
Item Name of adjustment
RCUT
GCUT
BCUT
GDRV
BDRV
CNTX
BRTC
COLC
TNTC
COLP
COLS
SCNT
VOLS
FVOL
NVOL
NICL
NICH
IDL
R CUTOFF (B/W)
G CUTOFF (B/W)
B CUTOFF (B/W)
G DRIVE
B DRIVE
CONTRAST MAX
SUB BRIGHTNESS CEN
COLOR CEN NTSC
SUB TINT CEN
COLOR CEN PAL
COLOR CEN SECAM
SUB CONTRAST FOR TV
VOL SCART
FM VOL PRE SCALE
NICAM VOL PRE SCALE
NICAM THRESHOLD LEVEL
NICAM THRESHOLD LEVEL
IGR THRESHOLD LEVEL
Preset
40H
40H
40H
35H
35H
7FH
80H
1AH
1FH
FBH
1AH
19H
75H
15H
3CH
03H
0AH
90H
Item Name of adjustment
IDH
IGR THRESHOLD LEVEL
EVOL
Volume out data on Woofer
operation
HPOS
H-POSITION DFS/100
VPOS
V-POSITION DFS/100
HIT
PICTURE HEIGHT DFS/100
VLIN
V-LINEARITY DFS/100
VSC
V-S CORRECTION DFS/100
VPS
V-BALANCE DFS/100
VCP
V-COMPENSATION DFS/100
WID
H-WIDTH DFS/100
PARA
E-W PARABOLA DFS/100
CNR
E-W CORNER DFS/100
TRAP
TRAPEZIUM DFS/100
HCP
H-COMPENSATION DFS/100
VFC
V-ƒ CORRECTION DFS/100
SRY
SECAM R-Y BLACK LEVEL
SBY
SECAM-B-Y BLACK LEVEL
Preset
A0H
03H
32H
80H
40H
12H
33H
40H
02H
59H
1CH
19H
44H
03H
08H
07H
04H
29"
←
←
34H
88H
48H
0AH
←
←
←
55H
17H
17H
46H
←
←
←
←
34"
←
←
32H
80H
40H
12H
←
←
←
59H
1CH
19H
44H
←
←
←
←
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
DESIGN MODE
ADJUSTING ITEMS AND DATAS IN THE DESIGN MODE:
Item Name of adjustment
OPT0
OPT1
OPT2
OPT3
OPT4
OPT5
OPTION 0
OPTION 1
OPTION 2
OPTION 3
OPTION 4
OPTION 5
– 13 –
Table-3
Preset Data Data
Data 29" 34"
02H
42H
04H
FDH
62H
C8H
←
←
←
DFH
←
C0H
←
←
←
DFH
←
C0H
Front
GENERAL ADJUSTMENTS
LOCATION OF CONTROLS
ON-TIMER indicator
POWER indicator
Remote sensor
q
POWER switch
Behind the door
SPECIFIC INFORMATIONS
S-VIDEO
a (3) Video 3 input
terminals
Headphones jacks
L : For private listening, connect headphones. The sound from the speakers will be cut off automatically.
To adjust the volume, press the – ; + buttons.
: Use this jack when listening to the sound of the sub-picture (Picture-in-Picture).
l
Back
L/MONO R
AUDIOVIDEO
(3)
Headphones jacks
(ø3.5 mm)
L Main sound
l
PIP sound
Input source selection
MENU
MENU
–;+ Volume – +
Menu <
(1)(
S-VIDEO
VIDEO
L/MONO
AUDIO
R
)(
2
COMPONENT
VIDEO INPUT
Y
P
B/
C
B/
P
R/
C
R/
CH
Channel position t s
Menu
>
)
4
(
)
MONITOR
(
FIXED
COMPONENT
VIDEO INPUT
(HD)
Y
P
B/
C
B/
P
R/
C
R/
AUDIO
L
R
)
Antenna input
a (1) Video 1 input terminals
a (2) Video 2 input/COMPONENT VIDEO INPUT terminals
a (4) Video 4 input/COMPONENT VIDEO INPUT (HD) terminals
– 14 –
FIXED AUDIO output
terminals
MONITOR output
terminals
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