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TM-A101G
SERVICE MANUAL
COLOUR VIDEO MONITOR
BASIC CHASSIS
TM-A101G/E TM-A101G/U
S2M1
CONTENTS
SPECIFICATIONS OPERATING INSTRUCTIONS (APPENDIX) SAFETY PRECAUTIONS FEATURES SPECIFIC SERVICE INSTRUCTIONS SERVICE ADJUSTMENTS STANDARD CIRCUIT DIAGRAM (APPENDIX) PARTS LIST
1
2 1-1 3 5 6 11 2-1 35
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
No.51921 Dec. 2001
TM-A101G
SPECIFICATIONS
Item
Dimension (W H D) Mass Colour system 222mm 220mm 6.8kg / 15.0lbs PAL / NTSC 3.58 25cm / 9-7/8" measured diagonally Flat-square type 90 deflection, in-line gun triodot type (phosphor dot-trio pitch 0.5 mm) 175mm 137mm (W H) / 222mm (Diagonal) 6-15/16" 5-7/16" (W H) / 8-3/4" (Diagonal) (H)15.734 kHz 15.625 kHz (V)59.94 Hz 50Hz Horizontal resolution Colour Temperature Power requirements High Voltage Power consumption Signal input / output VIDEO A VIDEO B AUDIO A AUDIO B REMOTE INPUT REMOTE ASPECT Audio power output Speaker Operation temperature Operation humidity Composite video signal : BNC terminal, 1V(p-p) 75 negative sync 1 bridge-connected output possible with automatic termination Composite video signal : BNC terminal, 1V(p-p) 75 negative sync 1 bridge-connected output possible with automatic termination Monaural, RCA pin, 500mV(rms) High-impedance, 1-bridge-connected output posible Monaural, RCA pin, 500mV(rms) High-impedance, 1-bridge-connected output posible 1 line, RCA pin input 1 line, RCA pin input 1W (Monaural) 8cm round 1, impedance 8 0 40 (32 104 F) (NTSC) (PAL) (NTSC) (PAL)
Content
316.3mm / 8-3/4" 8-11/16" 12-1/2"
Picture tube
Effective screen size Scanning frequency
280TV line or more 6500K ; x = 0.313, y = 0.329 230V AC, 50/60 Hz [TM-A101G/E] 120V AC, 50/60 Hz [TM-A101G/U] 21.0kV 23.0kV 0.43A [TM-A101G/E] 0.61A [TM-A101G/U]
20 80% (non-condensing)
Design & specifications are subject to change without notice.
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No.51921
TM-A101G
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the products should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards. 4. Use isolation transformer when hot chassis. The chassis and any sub-chassis contained in some products are connected to one side of the AC power line. An isolation transformer of adequate capacity should be inserted between the product and the AC power supply point while performing any service on some products when the HOT chassis is exposed. 5. Don't short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND, the ISOLATED(NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don't short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be broken. 6. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY). 7. The high voltage applied to the picture tube must conform with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product. 8. Do not check high voltage by drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k 2W resistor to the anode button. 9. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components. 10. Isolation Check (Safety for Electrical Shock Hazard) After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. (1) Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 1100V AC (r.m.s.) for a period of one second. (. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally found in the service trade. (2) Leakage Current Check Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.). Alternate Check Method Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER (HAVING 1000 /V, OR MORE SENSITIVITY) 0.15 F AC-TYPE PLACE THIS PROBE ON EACH EXPOSED METAL PART
GOOD EARTH GROUND
1500
10W
11. High voltage hold down circuit check. After repair of the high voltage hold down circuit, this circuit shall be checked to operate correctly. See item "How to check the high voltage hold down circuit". This mark shows a fast operating fuse, the letters indicated below show the rating.
POWER CORD REPLACEMENT WARNING.
Connecting the white line side of power cord to "WHT" character side.
A
V
No. 51921
3
TM-A101G
SAFETY PRECAUTIONS
1. The design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the product should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts in the product have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessary be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the Parts List of Service Manual may cause shock, fire, or other hazards. 4. The leads in the products are routed and dressed with ties, clamps, tubing's, barriers and the like to be separated from live parts, high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.
WARNING
1. The equipment has been designed and manufactured to meet international safety standards. 2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained. 3. Repairs must be made in accordance with the relevant safety standards. 4. It is essential that safety critical components are replaced by approved parts. 5. If mains voltage selector is provided, check setting for local voltage.
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No. 51921
TM-A101G
FEATURES
MAIN MICOM (IC731) PIN ARRANGEMENT
PORT NUMBER 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 H SYNC V SYNC NC V CENTER NC A VOLUME CUTOFF COMB SWITCH POWER ON/OFF AUDIO MUTE ASP REM NC Y/C SELECT POWER LED B1 PROTECT REMOCON P CHK INP REM VIDEO A MUTE VIDEO B MUTE Y/C MUTE NC NC X IN X OUT VSS PIN NAME PORT NUMBER 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 VDD OSC2 OSC1 RESET NC NC KEY IN3 KEY IN2 KEY IN1 SDA2 SDA1 SCL2 SCL1 NC NTSC / 0TH SECAM / 0TH VIDEO B VIDEO A BUS FREE X RAY SDA3 SCL3 YS B G R PIN NAME
I2C BUS FLOW CHART (SCL1/SDA1, SCL2/SDA2)
SCL1 SDA1
39 37
IC732
Memory
6 5
IC731
9 10
Micro Computer
38 36
IC201
Video Processor
SCL2 SDA2
No. 51921
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TM-A101G
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
CAUTION
Even with the power switch off, some parts of this unit are live. Be sure to disconnect the power plug from the AC outlet before disassembly and reassembly.
CHECKING THE PW BOARD
To check the PW board from back side. (1) Remove the chassis base and the other PW boards. (2) Erect the chassis base vertically so that you can easily check the PW board from back side.
REMOVING THE TOP COVER
1. As shown in Fig.2, remove the 4 screws marked 2. Remove the 4 screws marked . 3. Slightly spread the bottom of the top cover. 4. Shift the cover rearward and raise it upward to remove it. . CAUTION When erecting the chassis base, be careful so that there will be no contacting with the other PW board. Before turning on power, make sure that the CRT earth wire and the other connectors are properly connected.
REMOVING THE REAR PANEL
After removing the top cover. 1. Remove the 4 screws marked upward to remove it. . 2. Shift the top portion of the rear panel slightly rearward and raise it
WIRE CLAMPING AND CABLE TYING
1. Be sure to clamp the wire. 2. Never remove the cable tie used for tying the wires together. Should it be inadvertently removed, be sure to tie the wires with a new cable tie.
REMOVING THE TERMINAL BRACKET
Remove the top cover and rear panel. 1. Remove the 4 screws marked 2. Remove the screw marked terminal bracket. . attached the FBT with the and . these
Caution about Earth Wire
Befor turning on power, make sure that the earth wire (green colour) are properly connected to the terminal bracket by the screw and .
3. As shown in Fig.1, remove the screws marked
screws attached the earth wires to terminal bracket. (See the "Caution about the earth wire" as shown Fig.1) 4. Slightly shift the terminal bracket rearward and raise it upward to remove it.
TERMINAL BRACKET
REMOVING THE CHASSIS BASE
Remove the top cover, rear panel and terminal bracket. 1. As shown in Fig.3, while pushing raise the claw marked withdraw the chassis base toward you. 2. Follow the same steps when removing the other hand chassis base. ,
EARTH WIRE
REMOVING THE BOTTOM COVER
Remove the chasssis base. 1. Set the CRT front surfase downward, and stand the bottom cover to facing it toward you. At this time, care must be exercised not to damage the front panel and CRT surface. 2. As shown in the Fig.2, remove the 2 screws marked . 3. Slightly raise the bottom cover, and then pull it out to upward.
Fig.1
REMOVING THE SPEAKER
Remove the top cover. 1. Slightly spread the claws of the speaker holder, and pull up the speaker to remove it.
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No.51921
TM-A101G
FRONT PANEL ASS'Y
CRT TOP COVER CRT SOCKET PWB
(CLAW)
Fig.3
SPEAKER
CHASSIS BASE
MAIN PWB 2/2
FRONT CONTROL Block
SIGNAL PWB
TERMINAL BRACKET
REAR PANEL
CHASSIS BASE
MAIN PWB 1/2 (POWER&DEF. Bolck)
FBT
BOTTOM COVER
POWER CORD
Fig.2 No.51921 7
TM-A101G
REPLACEMENT OF MEMORY IC
1. MEMORY IC
This model uses memory IC. In the memory IC, memorized data for correctly operating for the video-chroma, deflection and the other control circuits. When replacing memory IC, be sure to use the IC written with the initial values of data.
1
SET-UP MENU < SET-UP MENU>
2. PROCEDURE FOR REPLACING MEMORY IC
(1) Power off Turn the power off and unplug the power plug from the AC outlet. (2) Replace IC Be sure to use the memory IC written with the initial setting data. (3) Power on Connect the power plug into the AC outlet and turn the power on. (4) Check and set SET-UP MENU items 1) Press the MENU key and the CHROMA/PHASE key simultaneously. 2) The SET-UP MENU screen (Fig. 1) will be displayed. 3) Check the setting value of the each item of the SET-UP MENU. If the value is different, select the item and set the correct value. 4) Press the MENU key, and return to the normal screen. (5) Check and set MENU items Press the MENU key and check the setting value of the each item. If the value is different, select the item and set the correct value. (6) Adjust the front control items Adjust the CHROMA, PHASE, CONTRAST and BRIGHT. Not all items can be adjusted as expected if the signal has not been input correctly in the adjustments. (7) Confirm the items of SERVICE MENU Confirm the each item of the SERVICE MENU. Refer to the corresponding page to operate the SERVICE MENU.
2
H.POSITION : 00 WHITE BALANCE CONTROL LOCK : OFF STATUS DISPLAY : ON INPUT REMOTE : OFF ASPECT REMOTE : OFF
3
4
EXIT
5
Fig.1 CURSOR Display with the current adjusting item. Operate with the CHROMA/PHASE key and CONTRAST/BRIGHT key. SETTING ITEM The items of setting SETTING VALUE Adjust each item of SET-UP MENU with the VOLUME/ SELECT ( or )key.
FUNCTION DISPLAY When you move the cursor to select the item, the function display changes the illustration. OPERATION KEY ARRANGEMENT In the SERVICE MENU, the original key operation by the front panel replaced with the displayed function.
< BLOCK SELECT > SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK
SIG W/B
DEF CNTL
EXIT
SERVICE MENU SCREEN
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No. 51921
TM-A101G
INITIAL SETTING OF THE SET-UP MENU TABLE
Setting item Setting content / Range -05 CUTOFF (R / G / B) WHITE BALANCE DRIVE (R / B) CONTROL LOCK STATUS DISPLAY INPUT REMOTE ASPECT REMOTE ON ON ON ON OFF OFF OFF OFF -09 +09 00 OFF ON OFF OFF +05 -09 +09 Initial setting value
H. POSITION
00 00
INITIAL SETTING OF THE MENU SCREEN TABLE
Setting item Setting content / Range 00 AUTO 4-3 +05 NTSC 16-9 PAL Initial setting value
SHARPNESS
03 AUTO 4-3
COLOUR SYSTEM
ASPECT RATIO
INITIAL SETTING OF FRONT PANEL CONTROLS
Control item Initial setting value A 00 00 00 00 20
INPUT SELECT CHROMA PHASE CONTRAST BRIGHT VOLUME
No. 51921
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TM-A101G
BLOCK SELECT ADJUSTMENT ITEM
SIGNAL BLOCK SERVICE ITEM S01 S02 S03 S04 S05 S06 S07 S08 BRIGHT CONTRAST CHROMA(PAL) CHROMA(NTSC) CHROMA(SECAM) PHASE(NTSC) BRIGHT(16:9) CONTRAST(16:9) In addition to the ones listed above, the following DEFLECTION BLOCK are also available. INPUT SIGNAL V. FREQ / ASPECT 50Hz / 4:3 CONTENTS R CUTOFF G CUTOFF B CUTOFF R DRIVE B DRIVE 60Hz / 4:3 50Hz / 16:9 60Hz / 16:9 SCREEN DISPLAY D01 D05 CONTENTS DEFLECTION BLOCK SERVICE ITEM D01 D02 D03 D04 D05 CONTENTS HORIZONTAL POSITION VERTICAL SIZE VERTICAL SIDE PIN CORRECTION VERTICAL CENTER VERTICAL LINEARITY
WHITE BALANCE SERVICE ITEM W01 W02 W03 W04 W05
DA1 DA5 DB1 DB5 DC1 DC5
CONTROL BLOCK SERVICE Number C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28
These are fixed values. Don't adjust them. ITEM MODEL BRIGHT POINT CONTRAST POINT CHROMA POINT PHASE POINT UPPER LOWER UPPER LOWER UPPER LOWER UPPER LOWER SERVICE Number C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 REMOCON S-FIELD SDC ATT DEMP F0 V. ID. SW S. KILL BELL. F0 ABL. GAIN ABL. POINT TRAP SW (NTSC) TRAP SW (PAL) TRAP Q (NTSC) TRAP Q (PAL) TRAP F0(NTSC) TRAP F0(PAL) TOF SW (NTSC) TOF SW (PAL) TOF Q (NTSC) TOF Q (PAL) TOF F0 (NTSC) TOF F0 (PAL) APA (V. NTSC) APA (V. PAL) APA (V. SECAM) APA (Y/C, B/W) R-Y BLACK OFFSET B-Y BLACK OFFSET CONTRAST CONTROL ITEM
OSD HORIZONTAL POSITION OSD VERTICAL FREQUENCY (50Hz) OSD VERTICAL FREQUENCY (60Hz) VERTICAL DELAY (NTSC) VERTICAL DELAY (PAL) VERTICAL DELAY (SECAM) VERTICAL DELAY (BLACK AND WHITE) S DELAY (NTSC) S DELAY (PAL) S DELAY (SECAM) S DELAY (BLACK AND WHITE) BRIGHT (VERTICAL) SHARP (CENTER VALUE) V-GUARD HOUR METER AFC MODE BURST (NTSC / PAL) BURST (SECAM) COLOUR SYSTEM
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No. 51921
TM-A101G
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. Confirm the proper AC power voltage is being supplied. 2. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes. 3. The setting is made on basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. 4. Use care not to disturb controls and switches not mentioned in the adjustment items.
FOCUS AND SCREEN ADJUSTMENT HOLES
The FOCUS and SCREEN adjustment holes are on the side panel. [CAUTION] Be sure to use a non-metalic driver for adjusting there VRs. A metalic driver can cause damage by shorting.
MEASURING INSTRUMENTS AND STANDARD SIGNAL
DC voltmeter (digital voltmeter) Oscilloscope Signal generator (PAL/NTSC systems) Colour analyser High voltage meter The wave form of signals refer following figure.
STANDARD VIDEO SIGNAL (PAL / NTSC COLOUR BAR)
0% SETUP
75% saturation
Adjustment holes Upper : FOCUS Lower : SCREEN
0.525Vb-w
BURST PAL : 0.3V(p-p) NTSC : 0.286V(p-p)
ADJUSTMENT ITEMS
Checking of B1 voltage Checking of High voltage Focus adjustment White Balance (Low Light) adjustment White Balance (High Light) adjustment Bright adjustment Contrast adjustment Chroma adjustment (PAL, NTSC) Phase adjustment (NTSC) Horizontal center adjustment Horizontal size center adjustment Vertical center adjustment Vertical size adjustment Vertical side pin cushion and linearity adjustment
No.51921
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TM-A101G
ADJUSTMENT LOCATIONS
POWER IND./SW VIDEO B IND./SW VIDEO A IND./SW
MAIN PWB 2/2
(FRONT CONTROL Block)
FRONT
SW LED
SW LED MENU +(UP) -(DOWN) CONTRAST /BRIGHT CHROM A/PHASE
VOLUME /SELECT
B
POWER SW
S901
MAIN PWB 1/2
FUSE DEG (POWER & DEF. Block) B
FRONT
F901
DY
AC
SIGNAL PWB UPPER : FOCUS VR LOWER : SCREEN VR TERMINAL BRACKET (Earth wire)
TO CRT SOCKET PWB
1:GND 2:X-RAY2 3:X-RAY1 4:NC 5:TP-91(B1) U HV H. SIZE COIL
V CENTER SW
S1
S401 FBT L502
TO DEF YOKE
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No.51921
CN001
E2
TM-A101G
UPPER
CRT SOCKET PWB (SOLDER SIDE)
Y
TP-47G
U
E1 TO MAIN PWB TP-47B TP-E CRT EARTH WIRE (BRAIDED ASS'Y)
UPPER
SIGNAL PWB
Y
VIDEO A
VIDEO B
AUDIO A AUDIO B
REMOTE (INPUT/ASPECT)
S
SHIELD CASE SPEAKER
CN001
No.51921
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TM-A101G
BASIC OPERATION OF SERVICE MENU
1. SERVICE MENU ITEMS
With the SERVICE MENU, various settings can be made, and they are broadly classified in the following items of adjustments. It is no requirement for adjustment the portion of the DEFLECTION BLOCK and CONTROL BLOCK. SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK This block adjusts the data of the various signal circuit controls. This block adjusts the data of the WHITE BALANCE adjustment. This block adjusts the data of the DEFLECTION circuit. This block adjusts the whole of the systems (This block is a fixed value. Don't adjust it.) 2 3
2. BASIC OPERATION OF THE SERVICE MENU
(1) HOW TO ENTER THE SERVICE MENU Press MENU key and VOLUME/SELECT + (UP) key simultaneously (Fig. 1). The letter "S" appears at the upper left of the screen (Fig. 2). While displaying the letter "S", press MENU key and CHROMA/PHASE key simultaneously (Fig.1). The screen display "PLEASE DON'T TOUCH" (Fig. 3). WHILE displaying the letters above-mentioned, press VOLUME/SELECT + (UP) key or (DOWN) key to display the SERVICE MENU as shown in Fig. 4. If above-mentioned steps or state continues for more than 5 seconds without a further operation, the display extinguishes and the mode is released. Fig.1 1
S
Fig. 2
SERVICE MENU
< BLOCK SELECT > SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK
BLOCK SELECT ITEM
PLEASE, DON'T TOUCH !
FUNCTION DISPLAY (Indication of key operation in SERVICE MENU)
SIG W/B DEF CNTL
EXIT
Fig. 3 Fig. 4
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No. 51921
TM-A101G
SERVICE MENU < BLOCK SELECT > SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK
(2) OPERATION OF SCREEN While the SERVICE MENU screen is displaying, in accordance with the key control display (Function Display) at the lower side of the screen, be able to operate the various items (Fig. 5).
SIG W/B DEF CNTL
EXIT
< Function Display >
SIG W/B DEF CNTL EXIT
SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK EXIT Press CHROMA/PHASE key. Enter to signal circuit adjustment mode. Press CONTRAST/BRIGHT key. Enter to white balance setting adjustment Press VOLUME/SELECT (DOWN) key. Enter to deflection circuit adjustment Press VOLUME/SELECT +(UP) key. Enter to system whole setting mode. Press MENU key. Return to normal screen mode.
< Front Panel Key Arrangement > Fig. 5
Service number indication < Function display > Setting value indication
< For example as following, explaining about SIGNAL BLOCK key operations. > (3) SELECT THE SERVICE NUMBER Press the CHROMA/PHASE or CONTRAST/BRIGHT key to select the service number. (4) ADJUSTMENT DATA OPERATION Press the VOLUME/SELECT + (UP) key to change the setting value in the + direction. Press the VOLUME/SELECT (DOWN) key to change the setting value in the - direction. (5) EXIT SERVICE MENU When adjustments are completed, press MENU key then return to the BLOCK SELECT screen. Again press MENU key then return to the normal screen. Exit key
EXIT
< S01 >
Data operate (inc/dec) key Service number select key < Front Panel Key Arrangement > Fig. 6
No. 51921
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TM-A101G
3. HOW TO OPERATE EACH SERVICE MENU ITEMS
SIGNAL BLOCK In the screen , press the CHROMA/PHASE key. Then SIGNAL BLOCK adjustment mode screen is displayed (Fig. 7). The original front key function replaced with the different function displayed at the lower side of the screen as shown below. Refer to the illustration given below, the function about each key in this mode. In this mode, CONTRAST/BRIGHT key is the switch of the screen display. If necessary, you can shut off the display. Carefully, values of adjustment items are changed while shut off the screen display. Press the MENU key, then exit the SIGNAL BLOCK screen to return to the screen. < Function Display >
DISP
SIGNAL BLOCK
DISP
EXIT
< S01 >
Fig. 7
EXIT
< S01 >
Setting value indicated Service number indicated
Adjustment mode exit key Data operate (inc/dec) key Display on/ off switch Select the Service Number < Front Panel Key Arrangement > WHITE BALANCE BLOCK WHITE BALANCE BLOCK In the screen, press the CONTRAST/BRIGHT key. Then WHITE BALANCE menu screen is displayed (Fig. 8). In this case, key function is replaced as shown below. There are several modes of WHITE BALANCE adjustment. Select the various WHITE BALANCE mode from this menu screen. Press the MENU key few times, then exit from the WHITE BALANCE BLOCK screen to return to the screen. < Function Display >
CUT OFF DRIVE
: CUTO : DRV
CUTO DRV
W01 W05
EXIT
Fig. 8
CUTO DRV
W01 W05
EXIT
Adjustment mode exit key Select the various item modes Select the DRIVE mode Select the CUTOFF mode < Front Panel Key Arrangement >
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No. 51921
TM-A101G
[ WHITE BALANCE Adjustment : METHOD 1 ] Accordance with the screen display, select the each WHITE BALANCE mode following below. CUTOFF adjustment mode (Low light adjustment) In the WHITE BALANCE menu screen, press the CHROMA/PHASE key to enter to the CUTOFF adjustment mode (Fig. 9). In this case, key function is replaced as shown below. Whenever press the CHROMA/PHASE key, change the adjustment colour of R, G and B. The single horizontal line service screen appears if press the CONTRAST/BRIGHT key (Fig. 10). Refer to the "Low-Light adjustment" corresponding page about detailed adjustment steps. < Function Display >
RGB SERV
CUTOFF ADJUSTMENT SCREEN
R CUTOFF
EXIT
***
Fig. 9
RGB SERV
EXIT
SINGLE HORIZONTAL LINE
single horizontal line Adjustment mode exit key Data operate (inc/dec) key Display 1H line switch Select the R, G or B mode < Front Panel Key Arrangement >
Fig. 10
DRIVE adjustment mode (HIGH LIGHT) In the WHITE BALANCE menu screen, press the CONTRAST/BRIGHT key to enter to the DRIVE adjustment mode (Fig. 11). In this case, key function is replaced as shown below. Whenever press the CHROMA/PHASE key, change the "R DRIVE" or " B DRIVE" adjustment mode. CONTRAST/ BRIGHT key is the switch of the screen display. If necessary, you can shut off the display. Carefully, values of adjustment items are changed while shut off the screen display. Refer to the "High-Light adjustment" corresponding page about detailed adjustment steps. < Function Display > DRIVE ADJUSTMENT SCREEN
R DRIVE ***
R-B DISP EXIT
R-B DISP
EXIT
Fig. 11
Adjustment mode exit key Data operate (inc/dec) key Display on/off switch Select the R or B mode < Front Panel Key Arrangement >
No. 51921
17
TM-A101G
[ WHITE BALANCE Adjustment : METHOD 2 ] SERVICE MENU has the other method for adjusting the WHITE BALANCE about above-mentioned method. In the WHITE BALANCE menu screen, press the VOLUME/SELECT +(UP) key or (DOWN) key, then enter to the "W01" or "W05" adjustment mode (Fig. 12, 13). In this case, key operation is changed as shown below. The operation of this mode is as same as SIGNAL BLOCK adjustment operation. In the case of select the "W01" mode, able to adjust the "R CUTOFF". But in order to adjust in correct condition must be adjust the other colour (G or B). Therefore, necessary to change the service numbers and adjusts each value. Press the CHROMA/PHASE key to select the service number. This mode is WHITE BALANCE BLOCK full adjustment mode (both Low light and High light are able to adjust). < Function Display >
DISP
WHITE BALANCE W01 mode
DISP
EXIT
< W01 >
Fig. 12
EXIT
< W0
>
Setting value indicated Service number indicated
WHITE BALANCE W05 mode
Adjustment mode exit key Data operate (inc/dec) key Display on/off switch Select the service number < Front Panel Key Arrangement >
DISP
EXIT
< W05 >
Fig. 13
18
No. 51921
TM-A101G
DEFLECTION BLOCK In the screen, press the VOLUME/SELECT (DOWN) key. Then the DEFLECTION BLOCK adjustment screen is displayed (Fig. 14). The original front key function replaced with the other function displayed at the lower side of the screen as shown below. CONTRAST/BRIGHT key is the switch of the screen display. If necessary, you can shut off the display. Carefully, values of adjustment items are changed while shut off the screen display. The indication of service numbers are changed by the signal that uses for adjustment (Vertical frequency and screen aspect ratio Fig. 15).
DEFLECTION BLOCK
EXIT
< Function Display >
< D01 >
EXIT
< D01 >
Setting value indicated Service number indicated
SIGNAL 50Hz 4:3 60Hz 4:3 50Hz 16:9
Fig. 14
SCREEN DISPLAY D01 D05 DA1 DA5 DB1 DB5 DC1 DC5
Adjustment mode exit key Data operate (inc/dec) key Select the Service Number < Front Panel Key Arrangement >
60Hz 16:9
Fig. 15
CONTROL BLOCK (This is a fixed value. Don't adjust it). In the screen, press the VOLUME/SELECT +(UP) key. Then the CONTROL BLOCK adjustment screen is displayed (Fig. 16). The original front key function replaced with the other function displayed at the lower side of the screen as shown below. < Function Display >
CONTROL BLOCK
EXIT
< C01 >
Setting value indicated Service number indicated
EXIT
< C01 >
Fig. 16
Adjustment mode exit key Data operate (inc/dec) key Select the Service Number < Front Panel Key Arrangement >
No. 51921
19
TM-A101G
4. SERVICE MENU FLOW CHART
SERVICE MENU SCREEN
< BLOCK SELECT > SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK
SIG W/B DEF
CNTL
EXIT
SIGNAL BLOCK CUTOFF ADJUSTMENT
DIS P
EXIT
< S01 > R CUTOFF
RGB SERV
***
EXIT
WHITE BALANCE BLOCK MENU SCREEN
DRIVE ADJUSTMENT
CUT OFF DRIVE
: CUTO : DRV
CUT O DRV
W01 W05
EXIT
R-B DISP
EXIT
R DRIVE ***
W01 DEFLECTION BLOCK
W05 ADJUSTMENT
DISP
EXIT
< W01 >
EXIT
< D01 >
CONTROL BLOCK
EXIT
< C01 >
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No. 51921
TM-A101G
INITIAL SETTINGS OF THE SERVICE MENU
SIGNAL BLOCK
SERVICE Number CONTENTS BRIGHT CONTRAST CHROMA(PAL) CHROMA(NTSC) CHROMA(SECAM) PHASE(NTSC) BRIGHT(16:9) CONTRAST(16:9) INITIAL SETTING VALUE
S01 S02 S03 S04 S05 S06 S07 S08
120 095 129 131 135 067 -001 -015
WHITE BALANCE BLOCK
SERVICE Number W01 W02 W03 W04 W05 CONTENTS R CUTOFF G CUTOFF B CUTOFF R DRIVE B DRIVE INITIAL SETTING VALUE
120 120 120 150 065
DEFLECTION BLOCK
SERVICE Number D01 D02 D03 D04 D05 DA1 DA2 DA3 DA4 DA5 DB1 DB2 DB3 DB4 DB5 DC1 DC2 DC3 DC4 DC5 ASPECT RATIO VERTICAL FREQUENCY CONTENTS HORIZONTAL POSITION VERTICAL SIZE INITIAL SETTING VALUE 006 060 034 000 007 004 001 002 000 -002 000 -036 000 000 000 000 -034 000 000 000
4:3
50Hz
VERTICAL SIDE PIN CORRECTION VERTICAL CENTER VERTICAL LINEARITY HORIZONTAL POSITION VERTICAL SIZE
4:3
60Hz
VERTICAL SIDE PIN CORRECTION VERTICAL CENTER VERTICAL LINEARITY HORIZONTAL POSITION VERTICAL SIZE
16:9
50Hz
VERTICAL SIDE PIN CORRECTION VERTICAL CENTER VERTICAL LINEARITY HORIZONTAL POSITION VERTICAL SIZE
16:9
60Hz
VERTICAL SIDE PIN CORRECTION VERTICAL CENTER VERTICAL LINEARITY
No.51921
21
TM-A101G
CONTROL BLOCK (This is a fixed value. Don't adjust it.)
SERVICE Number C01 C02 BRIGHT POINT C03 C04 CONTRAST POINT C05 C06 CHROMA POINT C07 C08 PHASE POINT C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 OSD HORIZONTAL POSITION OSD VERTICAL FREQUENCY (50Hz) OSD VERTICAL FREQUENCY (60Hz) VERTICAL DELAY (NTSC) VERTICAL DELAY (PAL) VERTICAL DELAY (SECAM) VERTICAL DELAY (BLACK AND WHITE) S DELAY (NTSC) S DELAY (PAL) S DELAY (SECAM) S DELAY (BLACK AND WHITE) BRIGHT (VERTICAL) SHARP (CENTER VALUE) V-GUARD HOUR METER AFC MODE BURST (NTSC / PAL) BURST (SECAM) COLOUR SYSTEM REMOCON S-FIELD SDC ATT DEMP F0 V. ID. SW S. KILL BELL. F0 ABL. GAIN ABL. POINT TRAP SW (NTSC) TRAP SW (PAL) TRAP Q (NTSC) LOWER 050 012 005 000 001 001 004 001 001 001 001 001 120 012 001 001 000 000 000 000 000 001 000 000 000 000 000 003 001 001 000 001 LOWER UPPER 030 050 LOWER UPPER 035 000 LOWER UPPER 063 040 MODEL UPPER CONTENTS INITIAL SETTING VALUE 001 063
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No.51921
TM-A101G
SERVICE Number C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 TRAP Q (PAL) TRAP F0(NTSC) TRAP F0(PAL) TOF SW (NTSC) TOF SW (PAL) TOF Q (NTSC) TOF Q (PAL) TOF F0 (NTSC) TOF F0 (PAL) APA (V. NTSC) APA (V. PAL) APA (V. SECAM) APA (Y/C, B/W) R-Y BLACK OFFSET B-Y BLACK OFFSET
CONTENTS
INITIAL SETTING VALUE 002 002 003 000 000 000 000 001 000 000 000 000 000 008 008 002
CONTRAST CONTROL
No.51921
23
TM-A101G
ADJUSTMENT
Item Checking of the B1 power supply Test equipment DC Voltmeter Test points TP-91(B1) : (S1 pin) Adjustment locations SCREEN VR [Lower knob : in FBT] Adjustment procedure 1. Set power supply voltage to AC230V A101G/E) / AC120V 5V (TM-
5V (TM-A101G/U).
TP-E(GND) : (S1 pin) [MAIN PWB]
2. Select WHITE BALANCE BLOCK mode from screen. 3. Select CUTOFF adjustment mode (Low light mode). 4. Press "SERV" switch to display the horizontal line. 5. Adjust the SCREEN VR to disappear the horizontal line. 6. Check the B1 voltage as 114.8V 2V. 7. Readjust the SCREEN VR to appear the horizontal line faintly, and cancel the horizontal line to press the "SERV" switch.
Checking of the High voltage
High voltage meter
CRT Anode
SCREEN VR [Lower knob : in FBT]
1. Set power supply voltage to AC230V A101G/E) / AC120V
5V (TM-
5V (TM-A101G/U).
2. Select WHITE BALANCE BLOCK mode from screen. 3. Select CUTOFF adjustment mode (Low light mode). 4. Press "SERV" switch to display the horizontal line. 5. Adjust the SCREEN VR to disappear the horizontal line. 6. Connect the high voltage meter to the CRT anode and check it as 21.0 23.0kV. 7. Readjust the SCREEN VR to appear the horizontal line faintly, and cancel the horizontal line to press the "SERV" switch.
Focus adjustment
Signal generator (Resolution pattern)
FOCUS VR [Upper knob : in FBT]
1. Input the resolution pattern signal. 2. Adjust the Focus VR for optimum focus where moire is not apparent. 3. Darken the picture and adjust the focus by turning counter-clockwise from the position where focus is poor. 4. Alternately repeat the above steps to obtain the optimum position.
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No.51921
TM-A101G
It must be set the composite VIDEO signal input and 4:3 scan mode when adjust the white balance. It is no required to adjust in the under scan screen mode.
Item White Balance (Low light) adjustment
Test equipment Signal generator (Monoscope pattern)
Test points
Adjustment locations SCREEN VR [Lower knob : in FBT]
Adjustment procedure Under the condition that B1 voltage adjustment has been finished. 1. Input the monoscope pattern signal. 2. Select the WHITE BALANCE BLOCK mode from screen. 3. Confirm the initial setting value of W01, W02, W03 in the SERVICE MENU are 120. 4. Select the CUTOFF adjustment mode. 5. Press "SERV" switch to display the single horizontal line. Carefully adjust the SCREEN VR to horizontal line appears faintly, not to shine much. 6. Gradually turn the SCREEN VR from the left to the right direction to bring one of the red, green and blue colours faintly visible. 7. Then select the CUTOFF switch (R, G or B) that colour except for appears first, and adjusting 2 colours CUTOFF values by pressing the +key, and make horizontal line visible white. 8. Readjust the SCREEN VR to appear the horizontal line faintly, and cancel the horizontal line to press the "SERV" switch.
W01 R CUTOFF W02 G CUTOFF W03 B CUTOFF [SERVICE MENU]
White Balance (High light) 6500K adjustment
Signal generator (Monoscope pattern) Colour Analyser or Colour temperature meter
W04 R DRIVE W05 B DRIVE [SERVICE MENU]
Under the condition that Low light adjustment has been correctly finished. 1. Input the monoscope pattern signal. 2. Select the WHITE BALANCE BLOCK mode from screen. 3. Select the DRIVE adjustment mode (High light mode). 4. Apply the sensor of the colour temperature meter to the CRT surface, portion of the 100% white, adjust the W04 (R DRIVE) or W05 (B DRIVE) to setting 6500K (x=0.313, y=0.329). 5. Exit the SERVICE MENU by pressing the "EXIT" key. 6. Check the white balance tracking is finest when CONTRAST and BRIGHT are up and down.
No.51921
25
TM-A101G
Item Bright adjustment
Test equipment Signal generator (Sprit colour bar)
Test points
Adjustment locations S01 (BRIGHT) [SERVICE MENU]
Adjustment procedure Under the condition that Low light adjustment has been correctly finished. 1. Input a sprit colour bar signal. 2. Select the SIGNAL BLOCK mode from screen. 3. Select the S01 item. 4. Adjust the S01 to where the sprit colour bar 0% black component faintly brightens. 5. Check it to on and off the screen display by turning the "DISP" switch.
Contrast adjustment
Signal generator (Full colour bar) Oscillo-scope
TP-47G TP-E( ) [CRT SOCKET PWB]
S02 (CONTRAST) [SERVICE MENU]
1. Input the full colour bar signal. (75 / 0 / 75 / 0 set-up level signal) 2. Connect the oscillo-scope probe to TP-47G and TP-E( ). 3. Select the SIGNAL BLOCK mode from screen. 4. Select the S02 item. 5. Adjust the S02 to become the voltage different between 75% white and 0% black to 30V 2Vp-p as shown in figure.
Mg R
B BL
V75-BL=(30 75% WHITE W Y Cy G
2)Vp-p
PAL CHROMA Saturation adjustment
Signal generator (Full colour bar) Oscillo-scope
TP-47B TP-E( ) [CRT SOCKET PWB]
S03(PAL CHROMA) [SERVICE MENU]
1. Input a PAL full colour bar signal. 2. Connect the oscillo-scope probe to TP-47B and TP-E( ). 3. Select the SIGNAL BLOCK mode from screen. 4. Select the S03 item. 5. Adjust the S03 to become the voltage different between 75% white and blue to 0V 2Vp-p as shown in figure.
BL R G Y B Mg Cy 75% W 0V 2V
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No.51921
TM-A101G
Item NTSC 3.58 CHROMA Saturation adjustment
Test equipment Signal generator (Full colour bar) Oscillo-scope
Test points TP-47B TP-E( ) [CRT SOCKET PWB]
Adjustment locations S04 (NTSC CHROMA) [SERVICE MENU]
Adjustment procedure 1. Input a NTSC 3.58 full colour bar signal. 2. Connect the oscillo-scope probe to TP-47B and TP-E( ). 3. Select the SIGNAL BLOCK mode from screen. 4. Select the S04 item. 5. Adjust the S04 to become the voltage different between 75% white and blue to 0V shown in figure. 2Vp-p as
BL R G Y B Mg Cy 75% W 0V 2V
NTSC 3.58 PHASE adjustment
Signal generator (Full colour bar) Oscillo-scope
TP-47B TP-E( ) [CRT SOCKET PWB]
S06 (NTSC PHASE) 1. Input a NTSC 3.58 full colour bar signal. 2. Connect the oscillo-scope probe to TP-47B and [SERVICE MENU] TP-E( ). 3. Select the SIGNAL BLOCK from SERVICE MENU. 4. Select the S06 item. 5. Adjust the S06 to become the voltage different between 75% white and magenta to 0V as shown in figure. 2Vp-p
BL R G Y B Mg Cy 75% W 0V 2V
No.51921
27
TM-A101G
DEFLECTION CIRCUIT ADJUSTMENT
There are 4 modes of DEFLECTION adjustment depending upon the kind of input signals. The adjustments must always be carried out in regular sequence given below. SIGNAL MODE 50Hz (PAL) 4:3 60Hz (NTSC) 50Hz (PAL) 16:9 60Hz (NTSC) DC D0 + DA + DC SERVICE NUMBER D0 DA DB SETTING VALUE D0 D0 D0 + DA + DB
If you change the figures in the course of the adjustments by returning to the preceding steps, all adjustments come to nothing. The screen aspect ratio 4 : 3 at 50Hz (PAL) is regarded as the reference value for all adjustments. The other values obtained in the adjustments using other signals become the offset values as opposed to the reference values.
Item H. Center H. Size Adjustment
Test equipment Signal generator (Crosshatch pattern)
Test points
Adjustment locations D01 (H.POSITION) [SERVICE MENU]
Adjustment procedure
SCREEN SIZE 90% 90%
1. Input a PAL (50Hz) crosshatch pattern signal. 2. Select DEFLECTION BLOCK mode from screen. L502(H. SIZE COIL) 3. Select D01 item. 4. Adjust D01 to align the picture center with the [MAIN PWB] CRT center. 5. Adjust L502 to set horizontal size to 90%. 6. Repeat above step 4 and 5 to adjust correctly.
100% PICTURE SIZE
100%
V. Center Adjustment
Signal generator (Circle pattern)
S401 (V.CENTER SW) [MAIN PWB]
7. Input the circle pattern signal. 8. Adjust S401 to agree with CRT center and signal center of vertical direction.
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No. 51921
TM-A101G
Item V. Size Adjustment
Test equipment Signal generator (Crosshatch pattern)
Test points
Adjustment locations D02 (V.SIZE) [SERVICE MENU]
Adjustment procedure 9. Input the crosshatch signal. 10. Select D02 item, and adjust it to the vertical scan size to 95%.
95% Screen size
100% Picture size
95%
100%
V. SIDE PINCUSHION V. LINEARITY Adjustment
Signal generator (Crosshatch pattern)
D03 (V. S-CR) D05 (V. LIN) [SERVICE MENU]
Should not adjustment except for in case of under the condition that remarkably bad about vertical linearity, 11. Input the crosshatch pattern signal. 12. Adjust the D03 to the all square in the crosshatch screen become true square. 13. Adjust the D05 to the all vertical lines become straight.
Side pincushion (Reel)
Side Pincushion (Barrel)
Vertical Linearity
If necessary, repeat the above steps (DEFLECTION adjustment) many times. And improve the adjustment level.
No. 51921
29
TM-A101G
PURITY / CONVERGENCE ADJUSTMENT
PURITY ADJUSTMENT
1. Demagnetize CRT with the demagnetizer.
WEDGE DEFLECTION YOKE
P
2. Loosen the retainer screw of the deflection yoke.
3. Remove the wedges.
CRT
4. Input a green raster signal from the signal generator, and turn the screen to green raster.
46
5. Move the deflection yoke backward.
P/C MAGNETS
P/C MAGNETS 6. Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig.2) P : PURITY MAGNET 4 : 4 POLES (convergence magnets) 6 : 6 POLES (convergence magnets) Fig.1
7. Adjust the gap between two lugs so that the GREEN RASTER will come into the center of the screen. (Fig.3)
8. Move the deflection yoke forward, and fix the position of the deflection yoke so that the whole screen will become green.
9. Insert the wedge to the top side of the deflection yoke so that it will not move.
PURITY MAGNETS
10. Input a crosshatch signal.
Long lug
11. Verify that the screen is horizontal.
Short lug
12. Input red and blue raster signals, and make sure that purity is properly adjusted.
Bring the long lug over the short lug and position them horizontally.
Fig.2
(FRONT VIEW )
GREEN RASTER
CENTER
Fig.3
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No. 51921
TM-A101G
STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig.1) and turn them to magenta (red/blue).
(FRONT VIEW )
3. Using 6-pole convergence magnets, overlap the magenta(red/blue) and green lines in the center of the screen and turn them to white. 4. Repeat 2 and 3 above, and make best convergence. Fig.1
(FRONT VIEW )
DYNAMIC CONVERGENCE ADJUSTMENT
1. Move the deflection yoke up and down and overlap the lines in the periphery. (Fig. 2)
BLUE
RED
GREEN BLUE
RED GREEN BLUE
2. Move the deflection yoke left to right and overlap the lines in the periphery. (Fig. 3) 3. Repeat 1 and 2 above, and make best convergence.
GREEN RED
BLUE
GREEN
RED
Fig.2
After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke. Fix the 6 magnets with glue.
(FRONT VIEW ) GREEN RED BLUE GREEN BLUE RED RED GREEN BLUE
BLUE GREEN RED
Fig.3
No. 51921
31
TM-A101G
REPLACE OF THE CHIP COMPONENT
CAUTIONS
1. 2. 3. 4. Avoid heating for more than 3 seconds. Do not rub the electrodes and the resist parts of the pattern. When removing a chip part, melt the solder adequately. Do not reuse a chip part after removing it.
SOLDERING IRON
1. Use a high insulation soldering iron with a thin pointed end of it. 2. A 30w soldering iron is recommended for easily removing parts.
REPLACEMENT STEPS
1. How to remove Chip parts Resistors, capacitors, etc. (1) As shown in the figure, push the part with tweezers and alternately melt the solder at each end.
2. How to install Chip parts
Resistors, capacitors, etc. (1) Apply solder to the pattern as indicated in the figure.
(2) Shift with tweezers and remove the chip part.
(2) Grasp the chip part with tweezers and place it on the solder. Then heat and melt the solder at both ends of the chip part.
Transistors, diodes, variable resistors, etc. (1) Apply extra solder to each lead.
Transistors, diodes, variable resistors, etc. (1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the solder. (3) First solder lead A as indicated in the figure.
SOLDER
SOLDER
(2) As shown in the figure, push the part with tweezers and alternately melt the solder at each lead. Shift and remove the chip part.
A B
C
(4) Then solder leads B and C.
A B
Note : After removing the part, remove remaining solder from the pattern.
C
32
No. 51921
TM-A101G
SELF DIAGNOSIS FUNCTION
1. OUTLINE
This model includes a SELF DIAGNOSIS FUNCTION that checks the circuit operating status and in event of malfunction, displays and stores the data in a memory. The data are stored in an I²C memory. Fault detection starts with the I²C bus and is performed according to the input states of the control lines connected to the MAIN CPU.
2. USAGE
SELF DIAGNOSIS FUNCTION mode entry (1) While press the MENU key and CONTRAST/BRIGHT key simultaneously, and push the MAIN POWER switch on. (2) Then displays the SELF DIAGNOSIS FUNCTION screen. The screen indicates as shown in the table and the SELF DIAGNOSIS FUNCTION mode is entered. If in event a malfunction at RASTER not display, at this time POWER LED flashes.
PROTECTION B X-RAY P-CHK V-NECK BUS MEMORY TV-PRO : : : : : : 3 3
SELF DIAGNOSIS SCREEN
CAUSE X-RAY PROTECTOR OVER CURRENT PROTECTOR
LED FLASHING CYCLE Quickly (0.1 sec on / 0.1 sec off cycles) Slowly (1.0 sec on / 1.0 sec off cycles)
SELF DIAGNOSIS FUNCTION mode release Turn the power switch to off or disconnect the power cord from AC outlet. In this way, not to clear the error counts. Reset the error count While entered in this mode, press the MENU key CHROMA/PHASE key and simultaneously. Then clear the error count of the each item. Fault history The fault history counts up to a maximum of 9 times for each item. If the number of times exceeds 9, the display remains at 9. The fault history remains stored in the memory until deleted. SELF DIAGNOSIS RESET RESET Are you sure? "Yes" "No" then <+> then