DOWNLOAD Panasonic TX-28PG45 Service Manual ↓ Size: 9.23 MB | Pages: 54 in PDF or view online for FREE

Model
TX-28PG45
Pages
54
Size
9.23 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / COLOUR TELEVISION
File
tx-28pg45.pdf
Date

Panasonic TX-28PG45 Service Manual ▷ View online

WAVEFORM PATTERN TABLE
Video Out
IC601 Pin 59
2V
64
µ
S
B - Out
E8 Pin 4
64
µ
S
4,6V
64
µ
S
2V
H - Pulse
Base Q503
VFLB
IC451 Pin 3
1V
20mS
B - Out
IC601 Pin 39
275
mV
64
µ
S
64
µ
S
3V
H - Out
IC601 Pin 50
Vert Out
IC601 Pin 31
20mS
0,7V
13
µ
S
3,7V
SCL
IC1201 Pin 3
R - Out
E8 Pin 5
64
µ
S
4
,6V
HFLB
IC601 Pin 13
64
µ
S
6,2V
R - Out
IC601 Pin 37
64
µ
S
275
mV
G - Out
IC601 Pin 38
275
mV
64
µ
S
Vert Drive
IC451 Pin 2
20mS
57V
HFLB
IC701 Pin 8
64
µ
S
1,5V
G - Out
E8 Pin 3
64
µ
S
4,4V
SVM Out
IC601 Pin 34
88mV
64
µ
S
H - Out
IC701 Pin 5
30mV
64
µ
S
5
ALIGNMENT SETTINGS
(The figures below are nominal and used for representative purposes only.)
1.  Set the Bass to maximum position, set the Treble to minimum position, press the volume down button
(-/v) on the customer controls at the front of the TV and at the same time press the INDEX button on the remote
control, this will place the TV into the Service Mode.
2. Press 
the 
RED / GREEN buttons to step up / down through the functions.
3. Press 
the 
YELLOW / BLUE buttons to alter the function values.
4. Press 
the 
STR button after each adjustment has been made to store the required values.
5.  To exit the Service Mode, press the "N" button.
Alignment Function
Settings / Special features
Horizontal Position
H-Pos
061
Optimum setting.
Vertical Position
V-Pos
005
Optimum setting.
Horizontal Amplitude
H-Amp
055
Optimum setting.
Vert. Amplitude
V-Amp
054
Optimum setting.
EW-amplitude
E/W-Amp1
-128
Optimum setting.
EW-amplitude
E/W-Amp2
006
Optimum setting.
Trapezium-comp
Trapez-1
047
Optimum setting.
Trapezium-comp
Trapez-2
-128
Optimum setting.
Vertical Linearity
V-Lin
006
Optimum setting.
Vertical Symmetry
V-Sym
002
Optimum setting.
DVCO
DVCO
-005
Receive a PAL Colour Bar Pattern. For
DVCO alignment press "Blue" button, wait
until the colours are changing slowly and
press "STR".
Cut-off DC
Cut-off
0171
Ug2 Test
Ug2
055
O.K.
To adjust Cutoff connect an oscilloscope to
the blue cathode. Press "STR" and adjust
"cutoff" value using the "Yellow" and
"Blue" buttons until the black level is
160V±5V press "STR" to store the value.
Remove the oscilloscope.
Select Ug2 adjustment and adjust the
screen VR until the display shows "O.K."
Highlight
Lowlight
High
0902 0777 0864
Low
0117 0132 0112
Optimum setting.
Sub-Brightness
Sub-Brightness
255
Optimum setting.
6
Black Level
160V±5V
GND
AUDIO BLOCK DIAGRAM
TNR003
Main
Tuner
1 2
9 10
G2 or G6 1 2
9 10
A9
4
A13
4
Main H/P
L
R
A11
5
4
16
15
17
18
12
13
10
11
A10
23
2
10
5
1
8
IC2303
10
5
8
9
7
1
IC2306
A41
2
1
R MIC
A45
1
A46
1
IC2301
18 R
R 23
10 L
L 3
L + R
Speaker
Tweeter
H2
5
4
16
15
17
18
12
13
10
11
H1
23
JK3406
JK3406
JK3405
1
3
3
3
1
1
6
2
6
2
6
2
L Out
R Out
L In
R In
R Out
L Out
L In
R In
L Out
R Out
L In
R In
AV4
AV2
AV1
R Out
IC2001
60 Mono In
67 Ana In
L 28
R 27
25 H/P L
24 H/P R
16 L
18 R
IC2302
L 3
14 L
R 6
11 R
IC3001
R 25
L 23
R 11
R 4
L 2
R 64
L 62
L 52
L 56
R 57
L 37
R 36
R 33
H/P R 48
H/P L 47
L 53
R 54
L 38
R 40
L
R
C
W
SL
SR
A - BOARD
H - BOARD
G - BOARD
H3
9 7
6
4 3 1
L
R
R
L
JK2401
A40
1
L 38
R 61
L 59
JK3102
7
WIRING BLOCK DIAGRAM
8
Degauss
Coil
DY
Coil
VM
Coil
CRT
Earth
CRT
Earth
K2
D20
K3
Mains
In
K1
A6
G2
A7
A44
DG01
to
DG70
JK3102
AV3
JK3401
AV1
JK3402
AV2
JK3403
AV4
A10
H1
A11
H2
JK3406 RCA
Audio
A1102
U2
A1101
U1
A21
L1
A - BOARD
DG - BOARD
G - BOARD
K - BOARD
D - BOARD
L - BOARD
U - BOARD
H - BOARD
L5
D6
L3
L2
L11
L12
JK351
A3
D3
A2
D2
A1
D1
D9
D5
CRT
Socket
A4
A40
A41
A45
A46
A20
RT1
Jig
R-Mic
L-Mic
L+R
Speakers
Tweeter
Vertical
DY Coil
Rotation
A21
A9
A13
G11
 G1
DP1
DP2
DP - BOARD
H3
DP4
DP3
DP5
Z1
Z2
Z - BOARD
Z3
Z7
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