1. It is advisable to insert an isolation transformer in the AC
supply before servicing a hot chassis. Fig. 1.
Fig. 1
2. When servicing, observe the original lead dress, especia lly
the lead dress in the high voltage circuits. If a short circuit is
found, replace all parts which have been overheated or
damaged by the short circuit.
3. After servicing, observe that all the protective devices such
as insulation barriers, insulation papers, shields, and
isolation R-C combinations, are properly installed.
4. When the receiver is not to be used for a long period of
time, unplug the power cord from the AC outlet.
5. Potential, as high as
is in operation. Operation of the receiver without the
receiver power supply. Servicing should not be attempted
by anyone who is not thoroughly familiar with the
precautions necessary when working on high voltage
equipment. Always discharge the anode of the picture tube
to the receiver chassis before handling the tube.
After servicing make the following leakage current checks to
prevent the customer from being exposed to shock
hazards.
29kV
kV is present when this receiver
1.3. Leakage Current Hot Check
(See Fig. 1)
1. Plug the AC cord directly into the AC outlet. Do not use an
isolation transformer for this check.
2. Connect a 2 kΩ, 10 W resistor in series with an exposed
metallic part on the receiver and an earth such as a water
pipe.
3. Use an AC voltmeter, with high impedance type, to
measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point. Fig. 3.
Fig. 3
5. Reverse the AC plug in the AC outlet and repeat each of the
above measurements.
6. The potential any point should not exceed
case of a measurement being outside of the limits specified,
there is a possibility of a shock hazard, and the receiver
should be repaired and re-checked before it is returned to
the customer. Fig. 4.
1.0 V rms
. In the
1.2. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two
prongs on the plug. Fig. 2.
Fig. 2
2. Turn on the receiver’s power switch.
3. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each expose d metallic cabinet
part on the receiver, such as screw heads, aerials,
connectors, control shafts, etc. When the exposed metallic
part has a return path to the chassis, the reading should be
ΩΩΩΩ
4M
between
not have a return path to the chassis, the reading must be
zero.
and 20 M
ΩΩΩΩ
. When the exposed metal does
Fig. 4
1.4. X-Radiation
Warning :
1. The potential sources of X-Radiation in TV sets are the EHT
section and the picture tube.
2. When using a picture tube test rig for service, ensure that
the rig is capable of handling
Radiation.
Note:
It is important to use an accurate periodically calibrated
high voltage meter.
1. Set the brightness to minimum.
2. Measure the High Voltage. The meter reading should
indicate
tolerance, immediate service and correction is required to
prevent the possibility of premature component failure.
3. To prevent the possibility of X-Radiation, it is essential to
use the specified picture tube.
27.5 ± 1.5V
. If the meter indication is out of
29 kV
without causing X-
3
_
_
CT-F2136LP
1.5. GP41 Block Diagram
CRT
coil
defl.
29" models
CRT
DRIVE
L
VM DRIVE
PIP models
IC1101
EEPROM
RGB
SCL SDA
SCL
SDA
R/G/B
PVP
IN
IC1801
CVBS
GP41 CHASSIS BLOCK DIAGRAM
PP
SPEAKER
R/G/B
CVBS OUT
AMP
AUDIO
A
VCT-IF
OUT
AUDIO
IC2301
REAR INPUTS
VM
V
H
IC601
IF
IN
IN
V
A
MON_OUT
AV1 : V/L/R
AV3 : YUV/V/L/R
V OUT
TUNER
AV2 : V/L/R
FRONT INPUTS
MON_OUT
H OUT
V/L/R
MAIN
POWER
SWITCH
G
AV2 : V/L/R
FRONT INPUTS
GEOMAGNETIC
AMP
IC2401
WOOFER
4
2 Service Hints
2.1. HOW TO MOVE CHASSIS INTO SERVICE POSITION.
1. Remove 9 screws.
CT-F2136LP
2. Draw out Main Chassis.
3. Stand the Main Chassis.
5
CT-F2136LP
3 Market Mode Function
3.1. Service Mode Access
1. Set timer ON.
2. Press remote’s RECALL (
3. Set to normal mode : Press the volume down button on front, together press the off timer button on remote control.
3.2. Service Mode 1 Controls
) and panel’s volume down key simultaneously to enter SERVICE 1.
1. Key 3 / 4
previous / next service 1 item
2. Key 8 / 9
adjust user brightness (-/+)
3. Program up / down
program position up / down
4. Volume +
increment of selected item
3.3. Service Mode 1 Function
1. H-POS
-128~127
2. V-POS
-128~127
3. H-AMP
-128~127
4. V-AMP
-128~127
5. EW-AMP1
-128~127
6. LOW_Corner
-128~127
7. TRAPEZ 1
-128~127
8. UPPER_Corner
-128~127
9. V-LIN
-128~127
10. V-SYM
-128~127
5. Volume -
decrement of selected item
6. OK (remote)
store / save selected item
7. Normal (remote)
exit service mode
11. ANGEL
-128~127
12. BOW
-128~127
13. DVCO
-128~127
14. H-POS
-128~127
15. G-CUT OFF
N/A
16. B-CUT OFF
0~511
17. R-DRIVE
0~511
18. G-DRIVE
0~511
19. B-DRIVE
0~511
20. SUB-Bright
-128~127
3.4. Service Mode 2 Controls (OPTION data 1 ~ 3)
1. Key 3 / 4
previous / next service 2 item
2. Key 8 / 9
toggle for options bit 0 - 7
3. Program up / down
program position up / down
4. Volume +
increment of selected item
5. Volume -
decrement of selected item
6. OK (remote)
store / save selected item
7. Normal (remote)
exit service mode
NOTE: Service mode 2 options bit refer to each model spec.
6
4 Adjustment Procedure
4.1. Adjustment Procedure
4.1.1. +B Voltage
CT-F2136LP
Item / preparation
1. Operate the TV set.
2. Set control as follows :
Brightness ........... minimum
Contrast ............... minimum
Adjustment procedure
1. Confirm the DC voltage at the indicated test points, as
follows :
TPD 15 : 3.35 ± 0.2V
TPD 16 : 141 ± 2V
TPD 17 : 8.2 ± 0.5V
TPD 18 : 1.9 ± 0.2V
TPD 19 : 5.2 ± 0.2V
TPD 20 : 175 ± 15V
4.1.2. High Voltage
Item / preparation
1. Receive the crosshatch pattern.
2. Set to 0 Beam.
Screen VR .......... minimum
Contrast .............. minimum
Adjustment procedure
1. Connect a DC voltage meter to D866 and confirm the +B
voltage is 141.0 ± 2V.
2. Connect a high frequency voltmeter to heater and confirm
that voltage reads 6.30 ± 0.24 (VRMS).
3. Normalize the brightness and contrast.
4.1.3. NTSC TINT COLOUR
Item / preparation
1. Connect oscilloscope probe to TPL1 (R OUT) with 10k
series resistor.
2. Press Main Menu and set system to use AV-NTSC (3.58
MHz).
DYNAMIC ................... Normal
Channel CLR Set ..... STD
Adjustment procedure
1. Adjust Sub-Tint so that No. 2, 3 and 4 becomes level
waveform is similar to Fig. 3.
2. Confirm phase at Tint is changes more than ± 15 by Tint
control.
3. Confirm that colour level is maximum when colour DAC is
adjusted to maximum position.
Note:
Use remote control only when adjusting user mode to
Sub-Tint.
Ω
4.2. COLOUR PURITY
1. Set Bright and Contrast controls to their maximum
positions.
2. Operate the TV set over 60 minutes.
3. Full degauss the picture tube by using an external
degaussing coil. By rotating R-B static convergence
magnet.
4. Apply a crosshatch pattern signal and adjust roughly the
static convergence magnets.
5. Apply a green pattern signal.
6. Loosen a clamp screw for the Deflection Yoke and move
the Deflection Yoke as close to the purity magnet as
possible.
7. Adjust the purity magnet so that a vertical green field is
obtained at the center of the screen.
8. Slowly press the Deflection Yoke and set it where a uniform
green field is obtained.
9. Adjust roughly the Low Light controls and make sure that a
uniform white field is obtained.
10. Tighten the clamp screw.
7
CT-F2136LP
4.3. CONVERGENCE
1. Apply a crosshatch pattern signal and set Contrast control
to the maximum position.
2. Adjust Bright control to obtain a clear pattern.
3. Adjust Red and Blue line at center of the screen.
4. Adjust Red and Blue with Green line at center of the screen
by rotating (RB)-G static convergence magnet.
5. Lock convergence magnets with silicone sealer.
6. Remove the DY wedges and slightly tilt the Deflection Yoke
vertically.
7. Fix the Deflection Yoke by re-inserting the DY wedges.
8. If purity error is found, repeat “Colour Purity” adjustment.
8
4.4. WHITE BALANCE (MARKET MODE CHK 4)
Preparation
1. Receive a colour bar signal with colour “OFF”, and operate
the TV set for more than 30 minutes.
2. Set the picture menu to “DYNAMIC NORMAL” and the AI to
off.
3. Connect an oscilloscope to KG on L BOARD.
4. Set the TV set to Market Mode : white balance adjustment
(CHK 4).
5. Screen VR : Min.
6. Set the data level of RGB CUT OFF / DRIVE and SUB
BRIGHT.
Adjustment
1. Select G-CUTOFF adjustment mode and collapse vertical
scan.
2. Adjust G-CUTOFF control to become the DC=0 V to video
level at 150 V as shown in Fig. 1.
8. Wedge A shown in Fig. 2 should be fixed within a range of
45° to the left of the vertical line as shown.
9. After inserting wedge A, insert wedges B, C and D.
The wedges should be set 90° apart from each other.
10. Be certain that the four wedges are firmly fixed and the
Deflection Yoke is tightly clamped in place otherwise the
Deflection Yoke may shift its position and cause a loss of
convergence and purity.
CT-F2136LP
Fig. 1
3. Slowly turn the screen control clockwise until a green colour
horizontal line appears on the picture tube. This is the
setting point for the screen control.
Note:
Do not adjust the G-CUTOFF setting in the following
procedure.
4. Adjust the remaining R and B-CUTOFF controls so as to
get a white horizontal line on the screen.
5. Return to full field SCAN by pushing the position 5 key on
the remote control.
6. Adjust the R-Drive and B-Drive controls as to obtain a
uniform white on the white bar of the greyscale pattern.
7. Confirm correct B/W rendition and greyscale tracking or
repeat CUTOFF and drive control setup.
Note:
Write down the original value for each address adjustment
before adjusting anything.
9
CT-F2136LP
4.5. ADJUSTMENT OF CRT VRS
PREPARATION
1. Set DY to CRT not to tilt up and down left and right deflection. (fig 1)
2. Set CY to CRT and set CY magnet primarily.
Pur Mg : Set Pur Mg that 2magnets are top position.
VRS Mag : Set VRS Mg that 2magnets are horizontal position.
ADJUSTMENT
1. Receive the white balance pattern.
2. Adjust V-CENTER.
3. Set R,B CUT OFF to minimum, and set G CUT OFF to center.
4. Receive the aging pattern.
5. Set 2 magnet of vertical position to up and down equally so that center part of CRT (Fig. 2)
10
5 Conductor Views
CT-F2136LP
11
CT-F2136LP
6 Schematic Diagrams
6.1. SCHEMATIC DIAGRAM FOR GP41 CHASSIS
12
CT-F2136LP
13
CT-F2136LP
6.2. A Board
6.2.1. A Board (1/5)
<1A>
<2A>
<3A>
<4A>
<5A>
<6A>
<7A>
14
<8A>
<9A>
6.2.2. A Board (2/5)
CT-F2136LP
<1A>
<2A>
<3A>
<4A>
<1B>
<2B>
<3B>
<5A>
<6A>
<7A>
<8A>
<4B>
<5B>
<6B>
<7B>
<9A>
<8B>
<9B>
15
CT-F2136LP
6.2.3. A Board (3/5)
<1B>
<2B>
<3B>
<1C>
<2C>
<4B>
<5B>
<6B>
<7B>
<3C>
<4C>
<5C>
<6C>
<7C>
<8C>
<8B>
<9B>
<9C>
16
6.2.4. A Board (4/5)
CT-F2136LP
<1C>
<2C>
<1D>
<2D>
<3D>
<4D>
<3C>
<4C>
<5C>
<6C>
<7C>
<8C>
<5D>
<6D>
<7D>
<8D>
<9C>
<9D>
17
CT-F2136LP
6.2.5. A Board (5/5)
<1D>
<2D>
<3D>
<4D>
<5D>
<6D>
<7D>
<8D>
<9D>
18
6.3. L Board
6.3.1. L Board (1/3)
CT-F2136LP
<1A>
<2A>
<3A>
<4A>
<5A>
<6A>
19
<7A>
CT-F2136LP
6.3.2. L Board (2/3)
<1A>
<2A>
<3A>
<4A>
<1B>
<2B>
<3B>
<4B>
<5A>
<6A>
<7A>
<5B>
<6B>
20
6.3.3. L Board (3/3)
<1B>
<2B>
<3B>
CT-F2136LP
<4B>
<5B>
<6B>
21
CT-F2136LP
7 Parts Locations
22
8 Replacement Parts List
8.1. Replacement Parts List Notes
CT-F2136LP
23
CT-F2136LP
8.2. Replacement Parts List
Ref.
No.
1A51LYZ295XPICTURE TUBE
2EASG15S02H2SPEAKER
3TBM4G1375MODEL NAME PLATE
4TBM4G3017PANASONIC BADGE
5TBX4G90411POWER BUTTON
No.
C3178ECJ1VC1H561J C 560PF, J, 50V
C3179ECJ1VC1H561J C 560PF, J, 50V
C3184ECJ1VF1C105Z C 1UF, Z, 16V
C3185ECJ1VF1C105Z C 1UF, Z, 16V
C350ECA1CM101BE 100UF, 16V
C360ECKW3D102KBP C 1000PF, K, 2KV
C363F2A1C4710045 E 470UF, 16V
C366F2A1C101A310 E 100UF, 16V
C368ECA2EM100BE 10UF, 250V
C370ECJ2VB1H272K C 2700PF, K, 50V
C371ECJ2VB1H272K C 2700PF, K, 50V
C372ECJ2VB1H272K C 2700PF, K, 50V
C373ECJ1VC1H471J C 470PF, J, 50V
C374ECJ1VC1H471J C 470PF, J, 50V
C376ECJ1VC1H471J C 470PF, J, 50V
C401ECJ1VC1H560J C 56PF, J, 50V
C404ECQB1333JFP 0.033UF, J, 100V
C406F2A1H221A247 E 220UF, 50V
C407ECJ1VC1H560J C 56PF, J, 50V
C408ECQB1154JFP 0.15UF, J, 100V
C454ECQV1H154JMP 0.15UF, J, 50V
C502ECKR3A821KBP C 820PF, K, 1KV
C504ECJ2VB1H681K C 680PF, K, 50V
C507ECJ1VF1C105Z C 1UF, K, 16V
C511ECA1VM101BE 100UF, 35V
C514F2A1E102A225 E 1000UF, 25V
C516F2A1E102A225 E 1000UF, 25V
C519F2A2C1010015 E 100UF, 160V
C520F2A0J221A317 E 220UF, 6.3V
C550ECQM4223JZP 0.022UF, J,400V
C552ECA2EM100BE 10UF, 250V
C554F0C2E184A039 P 0.18UF, 250V
C559F0C3C752A002 P 7500PF, 1.6kV
C560ECQM4393JZP 0.039UF, J,400V
C561ECKW3D271JBR C 270PF, J, 2kV
C565F0A1H273A039 C 0.027UF, 50V
C567ECQM4473JZP 0.047UF, J,400V
C568F0C3D102A003 P 1000PF, 2kV
C601ECJ2VB1H183K C 0.018UF, K, 50V
C602ECJ1VB1H222K C 2200PF, K, 50V
C604F2A1C101A310 E 100UF, 16V
C606ECJ1VF1H104Z C 0.1UF, Z, 50V
C607ECJ1VF1H103Z C 0.01UF, Z, 50V
C611ECJ1VF1H104Z C 0.1UF, Z, 50V
C613ECJ1VF1H104Z C 0.1UF, Z, 50V
C614ECJ1VC1H100C C 10PF, C, 50V
C615ECJ1VC1H100C C 10PF, C, 50V
C618F2A1C101A310 E 100UF, 16V
C619F2A1C101A310 E 100UF, 16V
C620ECJ1VB1H333K C 0.033UF, K, 50V
C622F2A1C101A310 E 100UF, 16V
C623F2A1C101A310 E 100UF, 16V
C626F2A1C101A310 E 100UF, 16V
C627F2A1C101A310 E 100UF, 16V
C628F2A1A471A274 E 470UF, 10V
C630ECJ1VF1H103Z C 0.01UF, Z, 50V
C631ECJ1VB1H333K C 0.033UF, K, 50V
C632F2A1H4R7A317 E 4.7UF, 50V
C633ECJ1VC1H471J C 470PF, J, 50V
C634ECJ1VC1H471J C 470PF, J, 50V
C635F2A1C101A310 E 100UF, 16V
C639ECJ1VF1H104Z C 0.1UF, Z, 50V
C640ECJ1VF1H104Z C 0.1UF, Z, 50V
C642ECJ1VF1H104Z C 0.1UF, Z, 50V
C645ECJ1VF1H104Z C 0.1UF, Z, 50V
C646ECJ1VF1H104Z C 0.1UF, Z, 50V
C652ECJ1VF1H104Z C 0.1UF, Z, 50V
C654ECJ1VF1H104Z C 0.1UF, Z, 50V
C655ECJ1VF1H104Z C 0.1UF, Z, 50V
C656ECJ1VC1H270J C 27PF, J, 50V
C657ECJ1VC1H560J C 56PF, J, 50V
Part No.Part Name & DescriptionRemarks
24
CT-F2136LP
Ref.
No.
C662F2A0J101A317 E 100UF, 6.3V
C665ECJ1VC1H150J C 15PF, J, 50V
C666ECJ1VC1H150J C 15PF, J, 50V
C667ECJ1VC1H180J C 18PF, J, 50V
C668ECJ1VC1H180J C 18PF, J, 50V
C813ECKCNA472ME7 C 4700PF, M,
C815F1A2E152A001 C 1500PF, 250V
C816F0CAF2240003 CAP 250VAC 0.22UF
C818F2A1H1R00053 E 1UF, 50V
C821ECKW3D561KBP C 560PF, K, 2KV
C826F0A1H103A039 C 0.01UF, 50V
C827ECQB1H473JFP 0.047UF, J, 50V
C830ECQB1H821KFP 820PF, J, 50V
C840F1A2E471A002 C 470pF, 250V
C841ECKW3D151KBR C 150PF, 2kV
C842F2A1H1000084 E 10UF, 50V
C843F2A1E102A223 E 1000UF, 25V
C848ECQB1H471JFP 470PF, J, 50V
C849F1B2H471A025 C 470PF, 500V
C851F0A1H103A039 C 2200PF, 50V
C854ECKWAE472ZED C 4700PF, Z,500V
C855ECKWAE472ZED C 4700PF, Z,500V
C856F2B2G2710010 E 270uF, 400V
C857ECQM4473JZP 0.047UF, J,400V
C859ECKW3D821KBP C 820PF, K, 2KV
C865ECKW3D331JBP C 330PF, J, 2KV
C867F2A2C2210013 E 220UF, 160V
C869ECJ2VB1E563K C 0.056UF, K, 25V
C870F2A1C332A260 E 3300UF, 16V
C871F1B2H471A025 C 470PF, 500V
C872F2A1C222A117 E 2200UF, 16V
C873L6Y5P4B122KC 1200PF, K,500V
C875ECJ2VB1H332K C 3300PF, K, 50V
C877F2A1C1000079 E 10UF, 16V
C879F2A0J331A260 E 330UF, 6.3V
C882F2A1C101A310 E 100UF, 16V
C884F2A1C102A159 E 1000UF, 16V
C886F2A1H330A342 E 33UF, 50V
C887F2A1C102A159 E 1000UF, 16V
C890ECQB1H104KFP 0.1UF, K, 50V
C891F2A1C101A310 E 100UF, 16V
C893ECA1CM221BE 220UF, 16V
C897ECJ2VB1H332K C 3300PF, K, 50V
C898ECJ1VF1C105Z C 1UF, Z, 16V
IC1101 TVR4GAS528EEPROM IC
IC2301 C0ZAZ0000164 IC
IC451AN15525AIC
IC601TVR4G20-6FLASH MEMORY IC
IC605C0ZAZ0000162 IC
IC801C5HABZZ00116 IC, HYBRID
IC802C0EAS0000026 IC
IC851C0DAEJG00001 IC, POWER SUPPLY
IC857C0DBEHE00005 IC, POWER SUPPLY
IC860B3PAA0000363 PHOTO COUPLER
IC871C0DAEJG00001 IC, POWER SUPPLY
IC875C0DBEHE00005 IC, POWER SUPPLY