toshiba 43A61 Technical Service

SAFETY PRECASAFETY PRECA
SAFETY PRECA
SAFETY PRECASAFETY PRECA
SERSER
VICE VICE
SER
SERSER
Only qualified service technicians who are familiar with safety checks and guidelines should perform service work. Before replacing parts, disconnect power source to protect electrostatically sensitive parts. Do not attempt to modify any circuit unless so recommended by the manufacturer. When servicing the receiver, use an isolation transformer between the line cord and power receptacle.
SERSER
SER
SERSER
Use EXTREME CAUTION when servicing the high voltage circuits. To discharge static high voltage, connect a 10K ohms resistor in series with a test lead between the receiver ground and CRT anode lead. DO NOT lift the CRT by the neck. Always wear shatterproof goggles when handling the CRT to protect eyes in case of implosion.
X-RAX-RA
X-RA
X-RAX-RA
Be aware of the instructions and procedures covering X-ray radiation. In solid-state receivers and monitors, the CRT is the only potential source of X-rays. Keep an accurate high voltage meter available at all times. Check meter calibration periodically. Whenever servicing a receiver, check the high voltage at various brightness levels to be sure it is regulating properly. Keep high voltage at rated value, NO HIGHER. Excessive high voltage may cause X-ray radiation or failure of associated components. DO NOT depend on protection circuits to keep voltage at rated value. When troubleshooting a receiver with excessive high voltage, avoid close contact with the CRT. DO NOT operate the receiver longer than necessary. To locate the cause of excessive high voltage, use a variable AC transformer to regulate voltage. In present receivers, many electrical and mechanical components have safety related characteristics which are not detectable by visual inspection. Such components are identified by a # on both the schematic and the parts list. For SAFETY, use only equivalent replacement parts when replacing these components.
GENERAL GUIDELINESGENERAL GUIDELINES
GENERAL GUIDELINES
GENERAL GUIDELINESGENERAL GUIDELINES
Perform a final SAFETY CHECK before returning receiver to customer. Check repaired area for poorly soldered connections, and check entire circuit board for solder splashes. Check board wiring for pinched wires or wires contacting any high wattage resistors. Check that all control knobs, shields, covers, grounds, and mounting hardware have been replaced. Be sure to replace all insulators and restore proper lead dress.
WARNINGWARNING
VICE
WARNING
VICE VICE
WARNINGWARNING
VICING VICING
VICING
VICING VICING
Y RADIAY RADIA
Y RADIA
Y RADIAY RADIA
THE HIGH THE HIGH
THE HIGH
THE HIGH THE HIGH
TION AND HIGH TION AND HIGH
TION AND HIGH
TION AND HIGH TION AND HIGH
VV
OLOL
V
OL
VV
OLOL
TT
AA
GE AND CRGE AND CR
T
A
GE AND CR
TT
AA
GE AND CRGE AND CR
VV
OLOL
TT
V
OL
T
VV
OLOL
TT
TT
T
TT
AA
GE LIMITSGE LIMITS
A
GE LIMITS
AA
GE LIMITSGE LIMITS
UTIONSUTIONS
UTIONS
UTIONSUTIONS
SAFETY CHECKS — FIRE AND SHOCK HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
Cold LeakaCold Leaka
Cold Leaka
Cold LeakaCold Leaka
Unplug the AC cord, connect a jumper across the plug prongs, and turn the power switch on (if applicable). Use an ohmmeter to measure the resistance between the jumped AC plug and any exposed metal cabinet parts such as antenna screw heads, control shafts, or handle brackets. Exposed metal parts with a return path should measure between 1M ohms and 5.2M ohms. Parts without a return path must measure infinity.
Hot LeakaHot Leaka
Hot Leaka
Hot LeakaHot Leaka
Plug the AC cord directly into an AC outlet. DO NOT use an isolation transformer. Use a 1500 ohms, 10W resistor in parallel with a .15µF capacitor to connect between any exposed metal parts on the receiver and a good earth ground. (See figure below.) Use an AC voltmeter with at least 5000 ohms per volt sensitivity to measure the voltage across the resistor. Check all exposed metal parts and measure voltage at each point. Voltage measurements should not exceed .75VAC, 500µA. Any value exceeding this limit constitutes a potential shock hazard and must be corrected. If the AC plug is not polarized, reverse the AC plug and repeat exposed metal part voltage measurement at each point.
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or Receiveror Receiver
or Receiver
or Receiveror Receiver
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s with Isolated Gr
s with Isolated Grs with Isolated Gr
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PF GOLD 15PF GOLD 15
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Important Parts Information ..................... 1
Miscellaneous Adjustments ......................1
Parts List ................................................... 6
Placement Chart ....................................... 5
Safety Precautions .................................... 1
Schematic Component Location ..............6
Schematic Notes ....................................... 1
Schematics
Audio ................................................. 3
A/V .................................................... 4
Comb Filter .......................................4
Convergence ...................................... 4
Power Supply ....................................3
System Control .................................. 3
Television .......................................... 2
VM .................................................... 1
Service Precautions .................................. 1
Test Equipment......................................... 4
Tuner Information
H001 Main ........................................ 1
HY01 PIP ..........................................1
INDEXINDEX
INDEX
INDEXINDEX
PF GOLD 15
Technical Service Data
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Model 43A61 (Chassis Model 43A61 (Chassis
Model 43A61 (Chassis
Model 43A61 (Chassis Model 43A61 (Chassis
Representative Model
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The listing of any available replacement part herein in no case constitutes a recommendation, warranty, or guarantee by SAMS Technical Publishing as to the quality and suitability of such replacement part. The numbers of the listed parts have been compiled from information furnished to SAMS Technical Publishing by the manufacturers of the specific type of replacement part listed.
Reproduction or use, without express permission, of editorial or pictorial content, in any manner, is prohibited. No patent liability is assumed with respect to the use of the information contained herein.
© 2002
5436 West 78th Street Indianapolis, IN 46268-4149
Printed in the United States of America 5 4 3 2 1
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For Supplier AdFor Supplier Ad
For Supplier Ad
For Supplier AdFor Supplier Ad
See PHOSee PHO
See PHO
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ual Indeual Inde
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hematicshematics
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hematics
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Component locationsComponent locations
Component locations
Component locationsComponent locations
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SEPTEMBER SEPTEMBER
SEPTEMBER
SEPTEMBER SEPTEMBER
2002 PG GOLD 15 2002 PG GOLD 15
2002 PG GOLD 15
2002 PG GOLD 15 2002 PG GOLD 15
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H001 MAIN TUNER INFORMATION
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ν The parts listed here are those not usually available from a well-stocked supply cabinet or bin.
ν Where items may be replaced with equivalent parts, several alternates are shown from participating vendors.
ν On the parts lists, safety items are marked with a
these items.
ν When ordering parts, state the model number, part number, and description.
Many of these parts are available from your local Sams authorized distributor or the manufacturer of the equipment. Call Sams for the name of your nearest distributor:
# #
# to remind you that only exact replacements are recommended for
# #
Obtaining PObtaining P
Obtaining P
Obtaining PObtaining P
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800-428-7267
Or consult the Sams
Information on test equipment and replacement parts is listed in these pages for the following participating vendors. Consult the Sams
ν NTE Electronics, Inc. (NTE)
Annual Index
Annual Index
for the address of the original equipment manufacturer.
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H001 MAIN MAIN H001 MAIN MAIN
H001 MAIN MAIN
H001 MAIN MAIN H001 MAIN MAIN
PinPin
Pin
PinPin
(1) RF AGC 1.6V 1.6V 1.6V (2) VT 1.1V 4.4V 5.4V (3) AOS 5.0V 5.0V 5.0V (4) SCL 4.3V 4.3V 4.3V (5) SDA 4.3V 4.3V 4.3V (6) NC 0V 0V 0V (7) +5V 5.0V 5.0V 5.0V (8) NC 0V 0V 0V (9) BTL 33.5V 33.5V 33.5V (10) NC 0V 0V 0V (11) IF 0V 0V 0V (12) IF AGC 0V 0V 0V (13) +9V 9.0V 9.0V 9.0V (14) NC 0V 0V 0V (15) GND 0V 0V 0V (16) AFT 2.6V 4.2V 1.9V (17) AGC OUT 1.6V 1.6V 1.6V (18) VOUT 2.3V 2.3V 2.3V (19) NC 0V 0V 0V (20) GND 0V 0V 0V (21) ST 0V 0V 0V (22) BILI/SAP 9.0V 9.0V 9.0V (23) MODE .05V .05V .05V (24) F MONO .13V .13V .13V (25) MUTE 0V 0V 0V (26) TV ROUT 4.1V 4.1V 4.1V (27) TV LOUT 4.1V 4.1V 4.1V
NOTE: VHF Low Band voltages taken on channel 2.
VHF High Band voltages taken on channel 7. UHF Band voltages taken on channel 14.
VHF LoVHF Lo
VHF Lo
VHF LoVHF Lo
w Bandw Band
w Band
w Bandw Band
VV
OLOL
TT
AA
V
OL
T
A
VV
OLOL
TT
AA
VHF High BandVHF High Band
VHF High Band
VHF High BandVHF High Band
GE CHARGE CHAR
GE CHAR
GE CHARGE CHAR
TT
T
TT
UHF BandUHF Band
UHF Band
UHF BandUHF Band
H001 MAIN H001 MAIN
H001 MAIN
H001 MAIN H001 MAIN
(2)
(4)
(6)
(8)
(10)
(12)
(14)
(16)
(18)
(20)
(22)
(24)
(26)
TUNER TUNER
TUNER
TUNER TUNER
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
TERMINAL GUIDETERMINAL GUIDE
TERMINAL GUIDE
TERMINAL GUIDETERMINAL GUIDE
τ
(1)
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
τ
(3)
(5)
(7)
(9)
(11)
(13)
(15)
(17)
(19)
(21)
(23)
(25)
(27)
HY01 PIP TUNER INFORMATION
PF GOLD 15 PPF GOLD 15 P
PF GOLD 15 P
PF GOLD 15 PPF GOLD 15 P
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HY01 PIP HY01 PIP
HY01 PIP
HY01 PIP HY01 PIP
PinPin
Pin
PinPin
(1) RF AGC 1.6V 1.6V 1.7V (2) VT 1.2V 4.2V 6.0V (3) ADRS 0V 0V 0V (4) SCL 4.3V 4.3V 4.3V (5) SDA 4.3V 4.3V 4.3V (6) NC 0V 0V 0V (7) +5V 5.0V 5.0V 5.0V (8) NC 0V 0V 0V (9) +32V 33.5V 33.5V 33.5V (10) NC 0V 0V 0V (11) IF 0V 0V 0V (12) NC 0V 0V 0V (13) +9V 9.0V 9.0V 9.0V (14) AOUT 2.9V 2.9V 2.9V (15) GND 0V 0V 0V (16) AFT 4.8V 3.9V 3.6V (17) RF AGC 1.6V 1.6V 1.7V (18) V-OUT 2.4V 2.4V 2.4V
NOTE: VHF Low Band voltages taken on channel 2.
VHF LoVHF Lo
VHF Lo
VHF LoVHF Lo
VHF High Band voltages taken on channel 7. UHF Band voltages taken on channel 14.
TUNER TUNER
TUNER
TUNER TUNER
w Bandw Band
w Band
w Bandw Band
VV
OLOL
TT
AA
OL
OLOL
T
TT
GE CHARGE CHAR
A
GE CHAR
AA
GE CHARGE CHAR
V
VV
VHF High BandVHF High Band
VHF High Band
VHF High BandVHF High Band
TT
T
TT
UHF BandUHF Band
UHF Band
UHF BandUHF Band
HY01 PIP HY01 PIP
HY01 PIP
HY01 PIP HY01 PIP
(2)
(4)
(6)
(8)
(10)
(12)
(14)
(16)
(18)
TUNER TUNER
TUNER
TUNER TUNER
TERMINAL GUIDETERMINAL GUIDE
TERMINAL GUIDE
TERMINAL GUIDETERMINAL GUIDE
τ
(1)
τ
τ
(3)
τ
τ
(5)
τ
τ
(7)
τ
τ
(9)
τ
τ
(11)
τ
τ
τ
τ
τ
τ
τ
(13)
(15)
(17)
HIGH HIGH
HIGH
HIGH HIGH
VV
V
VV
OLOL
OL
OLOL
TT
AA
T
A
TT
AA
GE CHECKGE CHECK
GE CHECK
GE CHECKGE CHECK
SERSER
VICE MODE ADJUSTMENT CHARVICE MODE ADJUSTMENT CHAR
SER
VICE MODE ADJUSTMENT CHAR
SERSER
VICE MODE ADJUSTMENT CHARVICE MODE ADJUSTMENT CHAR
MISCELLANEOUS ADJUSTMENTS
TT
T
TT
SUB COLOR (COLC) & SUB SUB COLOR (COLC) & SUB
SUB COLOR (COLC) & SUB
SUB COLOR (COLC) & SUB SUB COLOR (COLC) & SUB
TINT (TNTC)TINT (TNTC)
TINT (TNTC)
TINT (TNTC)TINT (TNTC)
CONVERGENCE ADJUSTMENTCONVERGENCE ADJUSTMENT
CONVERGENCE ADJUSTMENT
CONVERGENCE ADJUSTMENTCONVERGENCE ADJUSTMENT
Tune in a picture. Set brightness, contrast, and color to MINIMUM. Turn the set off. Remove one of the high voltage cables. Insert a High Voltage probe tip into the vacant hole. Turn the set on, high voltage should read 31kV to 32kV. Turn the power off and insert the high voltage cable back into the vacant hole.
ENTERING ENTERING
ENTERING
ENTERING ENTERING
To enter the service mode, press the mute button on the remote. Press the mute button again and keep pressing while simultaneously pressing the menu button on the receiver. The letter S will appear on the screen indicating that the receiver is in the service mode.
When in the service mode, press the menu button on the receiver to display the adjustment menu. To select the item to be adjusted, press the channel up or down button. To adjust the reference value, press the volume up or down button. To exit from the service mode or the design mode, press the power button to turn off the receiver.
SELF DIASELF DIA
SELF DIA
SELF DIASELF DIA
Enter the service mode. Press the 9 button on the remote to check for proper execution of IC interfacing. The following is an explanation of what is displayed on screen:
yy
DisplaDispla
y
Displa
yy
DisplaDispla
[SELF CHECK] Self diagnostic function. No. 23000868 Part number of QA01. POWER : 000 Operation number of protecting circuit.
BUS LINE : OK BUS line check. OK is normal.
BUS CONT : OK Bus line acknowledge check. OK is
BLOCK : MAIN SUB Green display is normal. Cyan display is
SET ID : 01 EEP VER: 04 OPT1: 80 OPT2: 08
ITEM BITEM B
ITEM B
ITEM BITEM B
The following is a list of the buttons on the remote that will go to an item or perform a different function of the service mode:
1 RCUT 5 COLC 2 GCUT 6 TNTC 3 BCUT 8 Toggles audio test signal on and off. 4 SCNT 9 Self diagnostics
THE SERTHE SER
THE SER
THE SERTHE SER
GNOSTIC FUNCTIONGNOSTIC FUNCTION
GNOSTIC FUNCTION
GNOSTIC FUNCTIONGNOSTIC FUNCTION
UTTUTT
ONSONS
UTT
ONS
UTTUTT
ONSONS
VICE AND DESIGN MODESVICE AND DESIGN MODES
VICE AND DESIGN MODES
VICE AND DESIGN MODESVICE AND DESIGN MODES
ExplanationExplanation
Explanation
ExplanationExplanation
000 display is normal.
NG indicates a short to ground of the SCL or SDA signal or a short between SCL and SDA.
normal. A location number is NG. NG QA02 indicates QA02 is bad.
no check. Red display is NG. UV is TV mode, V1 is Video 1 mode, and V2 is Video 2 mode.
erenceerence
AdjustmentAdjustment
Adjustment
AdjustmentAdjustment
ItemItem
Item
ItemItem
RCUT Red Cutoff 80H 84H GCUT Green Cutoff 80H 80H BCUT Blue Cutoff 80H 88H GDRV Green Drive 40H 40H BDRV Blue Drive 40H 40H CNTX Sub Contrast Max 7FH 7FH BRTC Sub Brightness 80H 80H COLC Sub Color 50H 50H TNTC Sub Tint 44H 3AH SCOL Sub Color 05H 08H SCNT Sub Contrast 10H 0FH HPOS Horizontal Position 16H 15H VPOS Vertical Position 00H 00H HIT Height 64H 61H LIN Vertical Linearity 12H 13H VSC V-S Correction 10H 10H VPS Vertical Shift 18H 18H VCP Vert Compensation 0AH 0AH WID Width 28H 2CH PARA E-W Parabola 29H 29H CNR E-W Corner 08H 08H TRAP Trapezium 10H 10H HCP Horiz Compensation 00H 00H VFC V-F Correction 00H 00H PHUE PIP Tint 00H 00H PCNT PIP Contrast 00H 00H PCOL PIP Color 0FH 0FH RGBB RGB Bright 54H 54H PROF PIP R Offset 00H 00H PBOF PIP B Offset 00H 00H PGOF PIP G Offset 00H 00H
STRH Start H 67H 67H STRP Start Ptn 88H 87H VLD VLD 41H 42H VCEN Vert Position 81H 8DH
OPT1 Option 1 80H 80H OPT2 Option 2 08H 08H TVOP TV Option 00H 00H
INITIALIZAINITIALIZA
INITIALIZA
INITIALIZAINITIALIZA
NOTE: QA02 must be initialized after replacement.
Enter the service mode. Press and hold the recall button on the remote while simultaneously pressing the channel up button on the receiver. The initialization of QA02 is complete. Program channels into memory.
NameName
Name
NameName
TION OF QA02TION OF QA02
TION OF QA02
TION OF QA02TION OF QA02
RefRef
Ref
RefRef VV
V
VV
erence
erenceerence
aluealue
alue
aluealue
On SetOn Set
On Set
On SetOn Set
aluealue
VV
alue
V
aluealue
VV
Tune in a color bar pattern. Set contrast to maximum and brightness to midrange. Connect an oscilloscope to the red cathode. Enter the service mode. Select item COLC and adjust reference value to obtain 150Vp-p. Tune in an active channel. Select item TNTC and adjust reference value for proper flesh tones.
SUB BRIGHTNESS (BRSUB BRIGHTNESS (BR
SUB BRIGHTNESS (BR
SUB BRIGHTNESS (BRSUB BRIGHTNESS (BR
Tune in a picture. Set contrast to MINIMUM. Enter the service mode. Select item BRTC, adjust reference value until vertical retrace line just disappears. Adjust contrast for normal picture. Perform Height (HIT) adjustment.
HORIZONTHORIZONT
HORIZONT
HORIZONTHORIZONT (VPOS)(VPOS)
(VPOS)
(VPOS)(VPOS)
Enter the service mode. Press the TV/video button on remote until a crossbar pattern is displayed. Select item HPOS or VPOS and adjust reference value for the horizontal and vertical position alternately until the pattern is centered on the screen. Check the position of the picture with off­air signal.
HEIGHT (HIT)HEIGHT (HIT)
HEIGHT (HIT)
HEIGHT (HIT)HEIGHT (HIT)
Enter the service mode. Press the TV/video button on remote until a crosshatch pattern is displayed. Select item HIT and adjust reference value for slight underscan. Advance the data value by 8 steps and check the vertical position of the picture.
WIDTH (WID)WIDTH (WID)
WIDTH (WID)
WIDTH (WID)WIDTH (WID)
Enter the service mode. Press the TV/video button on remote until a crosshatch pattern is displayed. Select item WID, adjust reference value for slight underscan. Advance the reference value by 7 steps. Check for proper horizontal position of the picture.
E-W PE-W P
E-W P
E-W PE-W P
Enter the service mode. Press the TV/video button on remote until a crosshatch pattern is displayed. Select item DPC, adjust reference value for straight vertical lines on both sides of the pattern.
WHITE BWHITE B
WHITE B
WHITE BWHITE B
Turn receiver on. Allow a 10 to 30 minute warm up time. Adjust contrast to center and brightness to maximum. Enter the service mode. Press the TV/ video button on remote until the white screen pattern is displayed. Select items RCUT, GCUT, BCUT, GDRV, and BDRV and set the reference value for each to 40H. Press the video button on the remote to obtain a single horizontal line. Advance the screen control until a faint line of one predominant color appears on the screen. Adjust the other two cutoff items to obtain a dim white line. Press the video button on the remote to get full deflection. Select items GDRV and BDRV and adjust reference value of each for the best black and white picture on screen.
AL POSITION (HPOS) & AL POSITION (HPOS) &
AL POSITION (HPOS) &
AL POSITION (HPOS) & AL POSITION (HPOS) &
ARABOLA (DPC)ARABOLA (DPC)
ARABOLA (DPC)
ARABOLA (DPC)ARABOLA (DPC)
ALANCE (RCUTALANCE (RCUT
ALANCE (RCUT
ALANCE (RCUTALANCE (RCUT
TC)TC)
TC)
TC)TC)
,,
GCUT GCUT
,
GCUT
,,
GCUT GCUT
VERVER
VER
VERVER
,,
BCUT BCUT
,
BCUT
,,
BCUT BCUT
TICAL POSITIONTICAL POSITION
TICAL POSITION
TICAL POSITIONTICAL POSITION
,,
GDR GDR
VV
,,
BDR BDR
,
GDR
,,
GDR GDR
V
VV
,
BDR
,,
BDR BDR
V)V)
V)
V)V)
Select the Adjustment mode RCUT, GCUT, or BCUT of the service mode. Adjust convergence from center to circumference in order. Press “7” button to display the built-in crosshatch pattern, it includes the three colors (R, G, B). The cursor should be blinking in Red, this means that the Red conver­gence around the cursor can be done. Press “3” button to select the Green color to be adjusted. Press “2” up, “8” down, “4” left, “6” right to move the cursor to other point to be adjusted. Press “5” button to stop the cursor from blinking, or to start the cursor blinking again. If necessary a specified color line can be erased from the screen, press “100” button to erase Red line. Press “0” button to erase Green line. Press “ENT” or “RTN” button to erase Blue line. Repeat these steps to adjust the Red and Blue colors. Converge the selected color into the Green line. Press “7” button to save the adjustment changes. Press “7” button again to return to normal picture.
SERVICE PRECAUTIONS
Do not use a magnetized screw driver for screws of Deflection Yoke and Velocity Modulation Coil, to avoid magnetization of electron gun.
Magnetization of electron gun will degrade basic function, and result in unbalance of right and left shift of user static convergence, and result in no variable quantity.
When replacing a CRT:
DO NOT LOOSEN OR ADJUST ANY OF THE HEX HEAD SCREWS.
These screws are for sealing of CRT coolant fluid, loosening any of these screws will cause fluid leakage.
When replacing the anode cap assembly, or the anode lead assembly remove the anode lead holder from old assembly and attach it to the new anode lead, and make sure the point of the anode lead would be straight coming out of the lead holder.
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A MODEL 43A61 (CHASSIS
A MODEL 43A61 (CHASSIS A MODEL 43A61 (CHASSIS
A MODEL 43A61 (CHASSIS A MODEL 43A61 (CHASSIS
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PF GOLD 15 PPF GOLD 15 P
PF GOLD 15 P
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A MODEL 43A61 (CHASSIS
A MODEL 43A61 (CHASSIS A MODEL 43A61 (CHASSIS
A MODEL 43A61 (CHASSIS A MODEL 43A61 (CHASSIS
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PF GOLD 15 PPF GOLD 15 P
PF GOLD 15 P
PF GOLD 15 PPF GOLD 15 P
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e 2
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e 2e 2
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