Panasonic TX-43P15X / TX-43P15H / TX-43P15HQ / TX-43P15HZ / TX-51P15X / TX-51P15H / TX-51P15HQ / TX-51P15HZ (serv.man2) Service Manual ▷ View online
- 9 -
Disassembly For CRT Removal
To facilitate CRT replacement, the complete CRT mounting
chassis does not need to be removed.
1.
chassis does not need to be removed.
1.
Remove the Screen Frame Ass’y, Decorative Panel and
the Bottom Rear Cover Ass’y. ( See Disassemble for
Service ).
the Bottom Rear Cover Ass’y. ( See Disassemble for
Service ).
2.
From the Rear side, remove the defective CRT’s anode
lead from the Flyback Transformer block that is mounted
secured to the Main chassis E-Board.
lead from the Flyback Transformer block that is mounted
secured to the Main chassis E-Board.
3.
Grasp the anode lead protective cap body inside, and
rotate 1/4 turn counter clockwise and pull anode lead
sleeve out of the distributor.
rotate 1/4 turn counter clockwise and pull anode lead
sleeve out of the distributor.
4.
Discharge anode lead to CRT chassis metal frame.
5.
Unplug the defective CRT Dag ( GND ), from the CRT
Board, LBGND for LB, LGGND for LG, LRGND for LR.
Board, LBGND for LB, LGGND for LG, LRGND for LR.
6.
Remove lead wires ( DY, VM coil ) and anode lead wire
from holders as necessary.
from holders as necessary.
7.
Remove the CRT Board from the defective CRT neck.
8.
Note position of yoke with centering tabs and remove
from defective CRT.
from defective CRT.
9.
From the Top, remove (2) screws from the defective
CRT.
CRT.
10. Release CRT anode lead from CRT chassis wire clamp
and all other wires from holders.
11. Wire the anode lead wire.
12. Lift out CRT assembly with lens assembly and other
12. Lift out CRT assembly with lens assembly and other
CRT neck assemblies.
13. Lay CRT face down on a soft cloth.
14. Remove CRT lens by removing (4) screws.
14. Remove CRT lens by removing (4) screws.
15. Install yoke and VM coil with other CRT neck assemblies
on CRT neck in the same order and position as removed
from the defective CRT.
from the defective CRT.
16. Push yoke against bell of CRT and tighten the clamp just
snug enough so it will not easily shift.
17. Assemble CRT focus lens assembly to new CRT with (4)
screws. Make sure focus lens adjustment nut is in the
same location as on other CRT focus lens.
same location as on other CRT focus lens.
Note:
Please assemble with screws in the order shown in
detail and tighten with same torque.
detail and tighten with same torque.
FBT
Anode lead
(2) Screws
(for fixing CRT)
(for fixing CRT)
×
3
Front
(4) Screws (for fixing CRT)
1
4
3
2
- 10 -
CRT Set Up
Caution:
Insure yoke plugs on D-Board are reconnected
before turning the Receiver on to prevent damage to the hor-
izontal output transistor and/or CRTs.
izontal output transistor and/or CRTs.
1.
Connect signal generator to AV terminal and set for
Crosshatch pattern.
Crosshatch pattern.
2.
Loosen yoke clamp, seat yoke against bell of CRT and
rotate to correct yoke tile (compare to adjacent CRT)
tighten yoke clamp.
rotate to correct yoke tile (compare to adjacent CRT)
tighten yoke clamp.
3.
Remove adhesive from centering tabs and set centering
tabs for zero correction.
tabs for zero correction.
4.
Cover replacement CRT lens and static converge the
tubes not replaced if needed. Check size and linearity of
pattern and adjust as required.
tubes not replaced if needed. Check size and linearity of
pattern and adjust as required.
5.
Cancel the P-CONVERGENCE DATA by press the RE-
CALL [
] Button and [N] Button in Market mode
CHK4 for zero correction.
6.
Uncover replacement CRT lens and cover other two
CRT lenses. Adjust electrical focus on replacement CRT
and centering magnet. Adjust optical focus (lens) if
required.
CRT lenses. Adjust electrical focus on replacement CRT
and centering magnet. Adjust optical focus (lens) if
required.
7.
Goes out Market mode. (Do not store the Cancel data).
8.
Uncover all CRT lenses and use yoke centering magnet
to converge replacement CRT (in center area of screen
only) with other two CRTs. Disregard non-convergence
in areas other than center area.
to converge replacement CRT (in center area of screen
only) with other two CRTs. Disregard non-convergence
in areas other than center area.
9.
Adjust S and P convergence controls (see convergence
adjustment).
adjustment).
10. Perform White Balance procedure.
Dynamic Focus Adjustment and Confir-
mation
mation
1.
Focus adjustments should be performed after 1 hour of
aging.
aging.
2.
Use oscilloscope with 100 : 1 probe.
3.
Apply crosshatch pattern.
4.
Adjust the Red, Blue and Green focus VR on the focus
block for best focus of overall picture of each CRT. (Fig.
2)
block for best focus of overall picture of each CRT. (Fig.
2)
5.
Connect the scope probe to TP64, GND to D29.
Scope set at 20V/div & 5m sec./dev.
Scope set at 20V/div & 5m sec./dev.
6.
Confirm that waveform is 800V ± 60V. (Fig. 3)
7.
Proceed with Focus Adjustments.
Focus - Electrical Adjustment
1.
Cover the Red and Blue CRT, projecting Green only.
The electrical focus controls are located on the front.
Adjust the Green Focus VR for best focus of overall pic-
ture. (Fig. 2)
The electrical focus controls are located on the front.
Adjust the Green Focus VR for best focus of overall pic-
ture. (Fig. 2)
2.
Repeat for Red focus VR while projecting Red only.
3.
Repeat for Blue. (Best focus at bottom left corner of
screen)
screen)
Adhesive
Centering magnet
(Zero correction)
(Zero correction)
15±2mm
Fig.1
+
+
+
+
+
+
B
G
R
B
G
R
Screen adj. VR (3)
Focus adj. VR (3)
Focus Pack
Fig. 2
800±60V
Fig.3
0V
- 11 -
Focus - Optical Lens Adjustment
Note:
This adjustment normally should not require reset-
ting unless the lens has been replaced or adjust-
ment has changed.
ting unless the lens has been replaced or adjust-
ment has changed.
1.
Optical focus adjustment is located on the top of each
CRT lens system. Loosen the adjustment knurls locking
knob. (Fig. 4)
CRT lens system. Loosen the adjustment knurls locking
knob. (Fig. 4)
2.
Turn the Receiver on apply and view a monoscope pat-
tern.
tern.
3.
Adjust each lens focus for best focus while viewing each
CRT.
CRT.
4.
Cover the Red and Blue CRT, projecting green only.
Rotate the Green lens for best focus around screen cen-
ter area.
Rotate the Green lens for best focus around screen cen-
ter area.
5.
Do the same for the Red focus lens while projecting Red
only.
only.
6.
Repeat for Blue.
Adjustment knurls
locking knobs
locking knobs
B
G
R
Optical lens focus adjustment
Fig. 4
(Rear view)
- 12 -
Special Servicing Procedure
How to replace Memory IC (IC1211)
1. Many data which control circuit on the TV set are memorized in Memory IC.
If the memory IC will be replaced, perform each adjustment and setting by taking the following procedure.
Note :
Memory IC which are supplied through spare parts route have not memorized these data.
2. Automatic Initialization Procedure:
The initial data will be memorized in memory IC from MPU automatically so that the TV set operates basic function and then
TV goes “Market Mode”.
TV goes “Market Mode”.
1) Contact a jumper wire between TPA14 (pin 3 of IC1213) and ground.
2) Turn the TV set on. Memory IC is initialized and TV goes “Market Mode”.
3) Remove a jumper wire.
2) Turn the TV set on. Memory IC is initialized and TV goes “Market Mode”.
3) Remove a jumper wire.
" OK "
Normal
"
− −
"
Abnormal
( A-Board )
Check result of IC
( Check IC or its nearby components )
NVM : IC1211
( T-Board )
TXT : IC3501
( A-Board )
MSP : IC2001
( R-Board )
PIP
: IC1605
( A-Board )
AV
: IC3001
( A-Board )
COMB: IC5501
( X-Board )
DFV : IC771
( W-Board )
EXD1 : IC1806
( W-Board )
EXD2 : IC4102
( A-Board )
TNR1 : 1st Tuner (TNR001)
( A-Board )
TNR2 : 2st Tuner (TNR002)
Red
Yellow
Green
Protectin information
Black line : Normal
or Black Line
Other Colour : Abnormal Voltage,Shout down,Over Current,or V-Stop.
SELFCHECK
NVM
OK
COMB OK
OP1
A6
TXT
OK
DFV
OK
EXD1
OK
EXD2
OK
OP2
09
MSP
OK
OP3
12
OP4
07
OP5
FF
OP6
74
PIP
OK
TNR1
OK
OP7
F6
AV
OK
TNR2
OK
Self Check Function
SELF CHECK is used to automatically check the Bus lines
and Hexadecimal code of the TV set.
Contents of the Self Check is as follows.
and Hexadecimal code of the TV set.
Contents of the Self Check is as follows.
1. Confirmation result for IC function
2. Protection Information
2. Protection Information
Procedure
1. Simultaneously push the OFF TIMER button [
] on the
remote control and the VOLUME DOWN button [ - ] on
the TV set.
the TV set.
2. The TV enters the self-check mode and the result are dis-
played on the screen .
Please note that the program on number will be change
to position “I” Mode automatically.
Please note that the program on number will be change
to position “I” Mode automatically.
3. Press any key to clear the self-check mode and return to
the normal state.
On-Screen for SELFCHECK mode
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