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5.
3P68
A
B
C
D
110V-240V
Key Control
SW
1
W6553A
POWER SUPPLY
TUNER IF AMP
IF
RGB
ANTENNA
1
SCART
Vin
DEG COIL
2
+12V FOR AMP
+11V FOR MAIN
+41V FOR H-drive
+110V FOR B+
SDA
SCL
Tuner AGC
SAW101
Lin
Rin
V
2
REAR AV FRONT AV
RL
IF
AV in
24C08
TDA111xx
PHILIPS UOC3
LIN
3
H-out
Va-out
Vb-out
RIN
V
3
LR
V-AMP LA78040B
4
H-DRIVE
B OUT
V--DY
56
H--DY
3P68 Block Diagram
21"/14" CRT
R
G
B
4
CRT BOARD
R OUT
G OUT
R
L
5
ST2025B
SLIM OR RF
SPR
SPL
6
A
B
C
D
17
Page 19
A
AC90-270V
CN601
BROWN
BLUE
SW601
1
2
N
L
T3.15ALAC250
SW601
F601
TUBE
0.1AC/250V
R620
2.2M 1/2W
1
2
T5AL250V
C609
0.01u
C605
0.1u
R604
33K
R605
220
R606
6K8
C606
470P
TRANSFORMER
C610
2n2/AC400V
R609
8.2M
47uF/160V
VR620
1K
R628
4K7
+BADJ.
100K
0.47
K
A
IC621
TL431
R
STANDBY
ON
Q603
1015
R618
330
R617
390
C636
100uF
ZD606
3V9
ZD605
3V9
20uF
3
TUBE
DEGAUSSING
C601
0.22AC/250V
C602
T601
T601
Not used in 3p68
1
D
C604
1000P/2KV
3
S/GND
4
VCC
5
OLP/SS
6
FB
7
OCP/BD
D605
BA158
C608
10uF/35V
ZD602
18V
R607
22
7
613
8
9
0.22
390P/1KV
D620
800V/2A
BA158
C620
C621
+2.5V
L622
100uH
R627
220K-1/2W
C622
330uF/50V
C632
22uF/160V
R629
+B--110V
+41V
C631
R645
2.2K
1
ZD620
3V6
R626
10K
D614
4148
R632
2K2
Q622
1815
R625
10K
C638
0.1
D613
4148
R613
22-(1/4W)
R409
560
22-2W
ZD601
5V1
100
1013
Q604
IC602
8050
C408
220uF/16V
ZD607
5V6
C637
10uF/16V
220uF/16V
C628
+3.3V
+5V1
+5V
CN602
10 OHM PTC
R603
（）
D603D
D603C
4700/500V
C603B
C606D
4700/500V
D603A
D603B
5(NTC)-5W
R601
R602
200K-2W
2
5
R608
2K2
IC601
C607
100uF400V
W6553A
Not used in 3p68
2
R641
56K-2W
D620
BA159
C624
2200P/2000V
2
10
R621
D621
1000uF
R634
R638
2
R635
C639
T603
121314
11
R624
0.22
R622
0.22
D622
BYW36
C625
220u
8V2
C623
470/1KV
D623
BYW36
C627
680P/1KV
C626
1000uF
D626
BA158
Q602
2120
R633
220
C630
SOUND
ZD621
+9V
+10.5V
+8V
NICAM
B
BTSC
+12V
Port
Port
1uF
C225
IC851
L7809
R222
100
In
VR201
Gnd
Out
1K
75mA MAX
BTSC
+9V
C851
D618
1N4148
R635
10
RL601
C1815
Q607
C630
47uF
R636
100K
R634
Not used in 3p68
10K
C609
100uF
+12V
IC622
OPTOISO1
R630
680
4.7uF
C853
2K2
R851
C854
0.22uF
C855
0.47uF
C852
10uF
16
Cp2
Cph
Cadj CER
Cmo
Css
171819202122232425262728293031
503KHz
X851
4.7uF
C857
4.7uF
C856
Not used in 3p68
1uF
L851
10uH
C877
10uF
C878
0.1uF
100pF
C876
100pF
C875
100uF
C869
Vcc
COMP
Vcap
Cp1
OUTR
SAP
Csde
Cr
C858
C873
15nF
2.2uF
100uF
BTSC-TVL
DC2.5V
AV1 AV2
R631
680
SCART
1000uF
C629
1000uF
C625
+5V
R456
22
ZD205
5V1
C453
470u/25V
D452
BA158
C455
100u/35V
C454
1u/50V
C452
470u/25V
R452
1
C459
0.22u/100V
15P
1.2K-1W
1
2
R453
220-2W
VDRB
IC301
LA78040
1
INP
2
VCC1
3
PUMP UP
LA78040
4
GND
5
VOUT
6
OUTPUT VCC
7
NINP
VDRA
C458
0.033u
R431
1K2
C457
C456
0.22u/100V
R454
2
R455
0.68-2W
MUTE
IR
AV2
HOUT
AV1
BCL
Q401
C2482
+41V
R405
5.6K
C402
560pF
820
R406
C403
220pF
5
4
L304
790uH
5
Title
Size
Date: 13-Nov-2008 Sheet of
File: E:\JOB\PHILIPS\UOC TOP\3P68\ \3P68 .ddb
B
Number Revision
Drawn By:
4
C404
1uF
50V
T401
!
HDR
1
3
R408
33
Q302
1000P/2KV
C438
C317
784
C432
8n2/2KV
B+
B+
+180V
HY
10
1
2
FBT
9
0.1uF
C461
BEAM
8
R420
1K
ZD403
8V2
560K
R419
R422
680
D404
4148
R418
RES2
+5V
R421
180
ZD401
5V6
C450
470/500V
C451
470/500V
200P/500V
R411
4K7
C406
D450
BA158
D451
BA158
2
R410
3K6
R450
0.22
R451
0.22
V-
4
G2
18
G2
D433
BA158
R433
0.22/1W
C436
0.1u
V+
HT
7
5
3
6
T301
AFC
FOCUS
HV
ZD402
4.7u/250V
C437
FOCUS
HV
323
47K
Not use in 3p68
F630
Q303
R322
1.5-2W
2
4.7u/50V
C477
L303
2.8mH
R637
15K-2W
D310
BA158
2
C311
4.7u
105uH
L301
C318
274/400V
C325
364/400V
C435
0.56u/400V
R432
1K-2W
R430
15K-2W
D432
BA158
C434
4.7u
2
2
L431
44uH
C406
680P/2KV
2.7/2W
R315
CN402
2
1
3
2
4
1
CRT GND
HEATER
+180V
AFC
EW
EHTO
SCART:MONO2
D402
4148
R416
2K2
R417
5K5
C224
10u
NO SCART
C223
0.1u
1.5uH
L207
+8V
C717
10u
10u
C715
100P
C716
100P
L711
56uH
R804
R726
4K7
47K
MONO2
MONO1
CN805
4
3
L412
C
SCL
SDA
R865
R856100
100
AGND
DGND
SDA
SCL
OUTL
Vref
Cnd
CL
C867
0.1uF
C868
C864
2.2uF
BTSC-TVL
DC2.5V
+5V1
R230
75
100u
0.01u
Not used in 3p68
+8V
C714
L710
56uH
1u
R728
150
ZD707
5V6
P701
38.9MHz
SCHEMATIC DIAGRAM 3P68 BTSC
AGC
SAS
NC
2
3
1
C102
10u
C103
100pF
R101
C863
47nF
R853
150
C866
4.7uF
C864
10uF
C865
0.1uF
8K2
123456789101112131415
VEO
VEI
Cnr
Cm
Cdec
MAD
Ctw
Cw
Cts
Cs
32
C859
10uF
C862
1uF
C860
C861
10uF
1uF
68K
R852
TDA9850
IC801
AGC
KEY
0.22u
10u
+
R226
0
R220
100
R219
100
R203
10K
ZD204
5V6
ZD203
5V6
SDASCL
R215
3.3K
R214
3.3K
R218
R229
R228 3K3
R217 100
100
100
C209
C236
100P
C210
100P
C237
5
6
7
8
IC202
24C16
SDA
SCL
WP
VCC
1
2
3
4
R831
BTSC-TVL
NICAM-TVL
IF WITH SCART
NO 4052 NEEDED
BTSC-TVR
NICAM-TVR
FBL
R724
33K
R725
75
10K
NICAM+SCART
NO BTSC/NICAM
STEREO UOC
8
4052
TVR11AV1
AV2
10
9
12
NICAM+SCART
R8381KR839
1K
R827
100K
SCART
R717
820
+8V
R721
RES2
R716
0
C707
100P
R719
75
Used in 3p68-S
R715
75
C706
CAP
R718
75
C719
SCART&NO SIDE
&NO MONO-90
Used in 3p68-S
VO
SCART
17
19
21
VI
18
20
BT +33V
BM +5V
IFGND
SDA
SCL
NC
NC
IF
9
4
7
10
6
8
5
R103
R102
100
100
R104
10K
10uF16V
3.3K
0.01u
5V6
32
P2.1/PWM0
P2.0/TPWM
UOC
VDDP3.3V
SDA
C234
34
33
C235
L205
1.5u
3.3V
11
22uF50V
C106
C104
100pF
R106
75
R115
39K
C105
220uF
+33V
ZD101
C109
10nF
C221
D101
10
R636
5K6
+41V
+5V
IF
+5V
SYS
LED
FBL
R205
L202
1.5u
R204
3.3K
+
C206
C207
0.1u
10u
10u
100
R207
R202
R206
100
100
R227
+
C205
10u
1K
6800P
C208
ZD201
24.576MHz
X201
0.01u
P3.3/ADC3/PWM3PUSH PULL
P3.2/ADC2/PWM2PUSH PULL4mA
P3.1/ADC1/PWM1
P3.0/ADC0/PWM0
P1.5PUSH PULL INT0/P0.5
P1.0/INT1PUSH PULL
VDDA13.3V
VDDC3.3V
STANDBY
MUTE
P1.3/T1
P1.1/T0
33mA
GND5
VPE
SCL
WP
IR
37
40
36
42
41
35
39
38
R216 100
R225 10K
L204
1.5u
C238
220P
ZD202
5V1
+
C239
100u
L203
1.5u
3.3v
LS/L1/MONO1
Not used in 3p68
R907
1K
R907
1K
10u
C113
R710
47K
1C102
L31L22L03TVL4L15INH6VEE7VSS
VCC
R013R215R114R3
16
SCART:R2
STEREO UOC
or SCART MONO2
SCART:L2/MONO2
R824
100K
R834
100K
C803
16
FBL
R828
100K
R821
100K
IF NO 4052
NO OFFSET NEEDED
C713
C712
470u
470u
C704
100P
C703
100P
47K
MONO1
R
15
14
10u
ZD705
8V2
R714
R713
47K
R720
RES2
75
L703
L704
56uH
C709
L709
MONO2
J177
P704
G
11
13
B
9
7
5
10
12
8
6
LI
ID
D
SW705
SW706
CH+
123
GND
SCL
SDA
U101
100
100
R106
75
SDA SCL
R106
C109
10nF
68
Not used in 3p68
C107
10nF
R108
R107
1K2
4K7
R109
1K2
C108
1000
Q101
C2717
R112
R111
470
L101
1uH
+8V
C109
10nF
1
2
3
4
5
VDRA
VDRB
EW
R324
100
R243
4K7
1000P
C216
C203
+
1000P
C215
R2444K7
R208
12K
C214
0.1u
C202
10u
+
C212
C201
0.1u
C213
0.22u
C211
Y/Y3/CVBS3
BLANKIN
BCLIN
BOUT44GOUT45ROUT
PR/C3
PB
50
47
43
48
46
49
51
C244
C232
C246
R233
R232
R231
C245
560P
0.1u
0.1u
100
100
100
0.1u
R239
R237
R238 100
100
R234
1K
100
VI/Y/SVHS-Y
PR/SVHS-C
use in3p68-S
C231
use in3p68-S
+
10u
BCL
G
B
R
ZD501
5V6
+5V
R236
39K
R235
27K
M001
LED
0.01u
C715
L102
R113
10K
Q102
R112
10K
C108
0.01u
NTSC-M
SAW201
NTSC
SSIF
PAL
FMDEM
SYS
EHTO
AGC
10u
C710
R201
680
R210
R213
33K
+
R212
10K
100
0.1u
R211
C218
R208A
39K
10u
390
C220
330P
100
+
C217
0.15u
DC2.6V/300OHM
C2/C3/C4/AUDIOIN5R
DC2.2V 3.6V500 OHM，
DSC/5V 8V，
YSYNC
YOUT
HOUT
GND3
AFC
VP3
LSR58LSL
60
53
52
56
57
54
55
59
R255 560
R254
R241 10K
R253
C230
0.1u
560
100
ZD708
C229
0.1u
8V2
+
C228
10u
L206
1.5uH
R403
3K3
R404
+5V
HOUT
AFC
100
VIDEO2/SCART-CVBS
VIDEO1
SCART:R2
FMDEM
NO NTSC-M
Q901
1815
R905
820
C904
10u
R909
100K
+8V
MONITOR MONOAO
FIXEDLEVEL
SCART AO
NO SCART
R712
100
C722
10u
R706
10K
R709
47K
NO SCART
Q703
1815
R703
10K
R822
100K
R833
100K
R826
100K
SCART MONO
R711
68
Used in 3p68-S
R708
10K
C701
R701
L701
L705
4700P
+8V
C1815
Q750
NO 4052&
2.2u/50V
C767
R723
10K
R758
1K
1815
Q702
R761
1K
C755
100u/16V
C769
2.2u/50V
2.2M
R
G
B
IK
G
B
R502
22
C501
470PF
B
LO
RO
CN402
3
1
4
2
RI
H302
HEATER
CRT GND
+180V
G2
FPCUS
CH-
123
R07
R06
470
820
R01
150
1
2
3
4
+5V1
KEY
LED
IR
R08
1K2
+5V1
+5V
+8V
10mA
C219
R209
AUDIOIN3/IN1R
CVBS2/Y2
61
RS/R2/MONO2
KEY
LED
IR
R324
100
IC201
IF VO1VP2 5V2VCC 8V3PLLIF4GND25DECSDEM6FMDEMOUT7EHTO8AGC9IREF10VSC11VIFIN212VIFIN113VDRA14VDRB15AVL/EW16DECBG17SECPLL18GND119PH1LF20PH2LF21VP1 5V22DECDIG23XTAL OUT24XTALIN25SYS26FBL27LED28KEY29SCART30AV131AV2
UOC TOP
CVBS4/Y4/AUDIOIN5L
AUDIOIN2/IN1L/SSIF
63
62
64
ZD709 8V2
LS/L1/MONO1
SCART:L2
MUTE
R754
3.3K
R755
2.7K
D751
4148
C756
100u
Q753
NPN
C753
0.47u/50V
R752
56K
0.47u/50V
R750
47K
C751
C758
0.22u
R751
47K
C750
4700P
0.22u
C1815
Q754
2.2u/50V
C768
R759
1K
R760
47K
A1015
D750
4148
R762
2.2M
D754
4148
R763
+9V
GND
H501
R
R501
22
Q501
BF422
D752
4148
C759
100u
C752
C754
100u
100u
R756
100K
R753
56K
TEA2025
5
6
7
8
13
14
15
16
C757
C764
100u
C763
220u
D753
4148
MONO
Q751
L-
L+
SPEAKER
8 OHM(STEREO)
16 OHM(MONO)
LEFT(MONO)
1
R522
22
R505
15K-1W
C521
470PF
G
R509
220K
10uH
L501
1000/2KV
E
SW703
SW704
SW702
VOL+
VOL-
R04
R05
240
330
SCHEMATIC DIAGRAM FOR 3P68-R/S MAIN BOARD
SW701
AV/TV
MENU
R02
R03
180
150
Circuit
Diagrams
1
Resistors:
unit is "ohm"
1k=1000
1
2
+3.3V
Fusible
1/4W
1W
2W
1/6W
Capacitors: Warning:
1P
1n
1u
unit is "F"
=
=
=
10
10
10
-12
-9
-6
components should be used when
change them during servicing!
' ' are safety parts. The same
Cold ground
Components with symbol of
Hot ground
2
SCART+RCA
SCART+RCA
2RCA
2RCA
BTSC/NICAM
STEREO
YES
YES
STEREO
STEREO
YES
YES
4052 LO
4052 LO
63
63 4052 RO
4052 RO
61
61
4052 LO,RO
4052 LO,RO
5V1
C762
220u
C760
IC750
1
2
3
4
10
11
12
9
R757
100K
C766
100u
R+
R-
SPEAKER
16 OHM(MONO)
8 0HM(STEREO)
RIGHT/MONO
R521
22
1
R525
15K-1W
Q507
BF422
R504
2K7
C504
2RCA
STEREO
NO
MONO
4052 LO,RO
KB
YES
4052 LO
63
4052 RO
61
2K7
2RCA
MONO
----------
MONO
NO
MONO MONO
63
61
58
AO
22
470PF
R
R524
KG
SCART+RCA
AVS or NIC
STEREO
YES
NO
MONO
STEREO
100
NO
NO
NO
L1
L1
L1//L2
63,
63,
R1
R1
63
61
61 L2
L2
R1//R2
64,
64,
R2
R2
61
60
60
FMDEM
FMDEM
FMDEM
If it is changed ,without informed!
+9V
R512
BF422
C511
R514
2K7
KR
CRT
90
!
The purpose of this schematic diagram is just for reference.
SCART,RCA
SOUND TONE
MONO
----------
MONO NO
UOC
YES
4052
MONO1
4025 LO
(SCART)
AUDIO INPUT PIN
63
63
MONO2
4052 RO
(RCA)
61
61
AUDIO OUTPUT PIN
FMDEM
FMDEM
3P68
3
6.
N
4
R510
22
1
R515
15K-1W
Q504
5
HV
A
B
C
D
E
18
Page 20
Main PCB (Top Side)
3P68
6.
E21
N
19
Page 21
Main PCB (Bottom Side)
Circuit Diagrams and PWB Layouts
3P68
6.
E22
N
20
Page 22
IC450(VERTICAL DEFLECTION OUTPUT CIRCUIT)LA78040N
Block Diagram:
IC601(POWER SUPPLY)STR-W6553A
Block Diagram:
21
Page 23
IC201(OTP SIGNAL PROCESSOR FOR CRT TV)TDA11106PS N3
Block Diagram:
22
Page 24
7.
3P68
EN 25
IC750(STEREO AUDIO AMPLIFIER)TEA2025B
Block Diagram:
23
Page 25
8.Troubleshooting
8.
The following problemsdo not alwaysindicate a hardwarefailure. Therefore, pleaseuse the
below before calling for repair service. If, after following the guide
none of theremedies work, unplug
call for service.
Problem
TV will not turn on
No picture, no sound
No sound, picture OK
Spots on the screen (Snow)
Poor reception of broadcast
channels
Checks
Make sure the power cord is plugged in,
Check battery in the remote control.
Ensure the TV power is ON .
Check antenna/ cable connections.
Try dif ferent channel.
Maybe sound is muted. Try pressing
VOL+ button is not set to minimum.
Try another channel.
Check the AV cables for disconnection.
Maybe the TV is being affected by
high-voltage transmission lines, neon
Try redirecting or relocating your antenna
interference.
Change channels to confirm if the
Try another channel.
Check antenna connections.
If using VCR, check TV/VCR button.
Adjust fine tuning control.
Probably local interference, such as an
and Adjustments
(Maybe batteries are dead.)
interference from automobiles, trains,
signs or another sources
symptom is still present.
then press POWER button.
to reduce the affects of the
appliance.
troubleshooting guide
the TV and
of interference.
VCR
Cannot select a certain channel
Remote Control does not operate
The picture is doubled or tripled
(GHOST)
Degraded colours or tints
When the VCR test signal (TSG) is
pattern is distorted as shown in the
playback picture is not influenced by it.
That channel may be locked out with
Check for any obstacle between the
sensor window
.
received, the lower side of the test
figure. This is not a malfunction and the
SKIP CHANNEL function.
remote control and the remote control
Maybe batteries are dead. Try replacing
Check for incorrect battery orientation.
Please change the direction, height or
from
building or mountains might cause this
directional
Check whether all the picture adjustments
antenna may improve the reception.
Enter into the (Picture mode) inside the
set-up.
batteries with new ones.
positionof the antenna. Reflections
phenomenon. A highly
have been properly performed.
menu to select a different picture
24
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