Transcript
ELECTRICAL ADJUSTMENTS
BEKO Chassis 12.6
ACCESSING THE SERVICE MODE To enter the Service Mode, ‘Service In/Out” button on the Service Remote Control or activate the “Picture Menu” with the user remote control and press “8500”. “Red” , “Green”, “Yellow” and “Blue” Teletext buttons are for Feature Setup, Geometry, White Balance and AFC menus respectively. Press “0” button to exit the Service Mode.
1. POWER SUPPLY VOLTAGE Connect a digital voltmeter to the cathode of D607 diode at the AV1 mode of the TV and set the screen voltage to the minimum. Adjust the main supply voltage +B with P601 potentiometer to the following voltage value. Adjust the screen potentiometer to the level where a picture is just visible. 14” 20” 21”
A34LPE02X01 A48ECR143X51 A51EER133X41
106 VDC 118 VDC 118 VDC
2. AFC ADJUSTMENT Before starting the adjustment follow the procedure below: Enter service mode, change “VIDEO” header to the “NEW”. Then exit from service mode. Remarks: 1. The procedure above must always be done after replacing the Video IC (IC101) or EEPROM IC. 2. AFC adjustment must be done again when “VIDEO” header became “NEW” accidentally. For BG, DK, I, L standards (38.9 MHz) : Supply a 471.25 MHz BG system colour bar RF signal to the set by a pattern generator and find this signal in “setup” menu (C21). In order to deactivate AFT loop, shift value of “fine tuning” from central point by one unit and then shiftback to the central point again (2 small vertical lines are seen in the scale on central point). Store the channel by selecting “Store” and pressing “OK” button. Enter Service Mode and press “Blue” Teletext button. Adjust the “AFT38” item of service menu to read a value between “78” and “7C” (hexadecimal) on the right part of the screen. For example: AFT38 89 7B For SECAM L’ Standard (33.9 MHz): Supply a 55.75 MHz, L’ system colour bar RF signal to the set by a pattern generator and find this signal in “setup” menu (C02). In order to deactivate AFT loop, shift value of “fine tuning” from central point by one unit and then shiftback to the central point again (2 small vertical lines are seen in the scale on central point). Store the channel by selecting “Store” and pressing “OK” button. Enter Service Mode and press “Blue” Teletext button. Adjust the “AFT33” item of the service menu to read a value between “78” and “7C” (hexadecimal) on the right part of value of item “AFT38”. For example: AFT38 : 76 78 AFT33 : 65
3. AGC ADJUSTMENT Apply a signal at the channel 32 with 70±1dBuV level to the antenna input (switch sound carrier “Off” and switch “Video Ext” to the “On” state). Connect an oscilloscope between the pin 11 (IF2) of Tuner and ground. Enter service mode and find “AGC” header. Adjust the amplitude which is monitored from oscilloscope to the values given below using with Volume +/Volume- key of the remote control . PAL BG standarts : 750 mVpp±20mVpp PAL/Secam BG/DK standarts : 750 mVpp±20mVpp Secam LL’ standarts : 600 mVpp±20mVpp PAL I standarts : 700 mVpp±20mVpp Adjust “2.AGC” to the same value as “AGC”.
For non-Secam LL’ system sets if their serial number is lower than 30200001: Substract 5 from “AGC” value and adjust “2.AGC” to this value.
4. SCREEN ADJUSTMENT Enter service mode and press “Yellow” teletext button. Select “SCRN” item. Press Vol + or – button. You will see white horizontal line at the bottom of the screen. Adjust the screen potentiometer to the just visibility level of horizontal line. After adjustment press Vol + or Vol – button to see the picture (The value of “SCRN” item will be “0”).
5. GEOMETRY ADJUSTMENTS Enter service mode and press “Green” Teletext button. Check that “Y.DLY” value is “1”. “H.POS” is for horizontal position , “V.POS” is for vertical position “V.HEI” is for vertical size, “LNRTY” is for vertical linearity, “S.COR” is for S-correction, “OSD.H” is for OSD Horizontal Position, “OSD.V” is for OSD Vertical Position adjustment.
6. WHITE BALANCE ADJUSTMENTS Enter the service mode and press “Yellow” teletext button. Select and adjust “G.CUT” to the “64” for 14” sets and “40” for 20” and 21” sets. Adjust “R.CUT” and “B.CUT” for cut off adjustment. Select and adjust “R.DRV” and “B.DRV” for white balance. Change the “G.CUT” value a few unit if white balance could not be adjusted. Exit from service mode. Remark: When “VIDEO” item is selected “NEW”, optimum “SECBL” value (determined by the IC manufacturer) is loaded to EEPROM. Whereas if the black level of SECAM is not suitable, “SECBL” can be adjusted manually by applying a SECAM pattern that includes black sections and changing value of “SECBL” .
7. FEATURE SETUP TUNER ST.BY AV2 CLR.S SND.S TEXT LANG
BGBPF VIDEO
SHARP&ALPS, PHILIPS, P.SONIC, TEMIC YES : Automatic switch off is active (when there is no signal for 5 min) NO : Automatic switch off is not active (can be used during repair) NO : Single scart YES : Single scart +front AV PAL, PAL/NTSC (SECAM system is automatically detected by TV) BG, I, BG+DK, BG+ LL’ (Sound Systems) NON TEXT : Teletext not available DEFAULT : Teletext FASTTEXT : Fasttext A : English, German, French, Italian, Spanish, Portugal, Greek, Turkish, Dutch, Swiss, Danish, Norwagian, Finnish, Slovenian, Polish, Hungary, Russian, Hebrew B : English, German, French, Russian, Polish, Bulgarian, Serbian, Hungarian, Romenian, Slovenian, Macedonian, Croatian, Czech, Slovekian, Albanian, Arabian, Persian, Turkish INT : Video IC uses internal BG Band Pass Filter (default) EXT : Video IC uses external BG Band Pass Filter OLD : Default NEW : Switch once after replacing the Video IC (IC101) or EEPROM IC (Not: If it is switched to “NEW”, AFC adjustment must be done again as described in AFC Adj. Sect.).
8. PRESET VALUES OF SERVICE MENU ITEMS
SIZE
AGC
2.AGC (1)
VIDEO
H.POS
V.POS
V.HEI
LNRTY
S.COR
Y.DLY
OSD.H
OSDV
G.CUT
R.CUT
B.CUT
R.DRV
B.DRV
S RN
SECBL
AFT38
AFT33 (Sec L’)
Below given values are average values and can vary according to the CPT type and chassis type.
14”
46
46
OLD
14
4
64
46
0
1
25
33
64
65
64
59
53
0
48
40
61
20”
46
46
OLD
13
4
80
47
0
1
25
33
40
40
40
58
59
0
48
40
61
21”
46
46
OLD
14
4
81
47
0
1
25
33
40
40
40
55
56
0
48
40
61
(1) Please see Section 3 AGC Adjustments.
Figure. Service Remote Control
12.6 CTV CHASSIS G99.820 155V
CRT BOARD C709 10u/250V 155V
R721
X702 CRT SOKET
220R D701 1N4007
GND GND
R701 15k 1W
4
n.c. 9V_
BF422 T701
R703 2.7k
C701 (N)
R705 470R
9V_
(M) R719 220R(opt)
1
11
BLUE
10
HT
L102 10uH
5
R114
6 9 7
GREEN
R115 4.7k
8 HT
100R
R116 4.7k F102
D102
RED
VOLUME
K9456M
1
G2 crt
9V"
G1
C702 390p R706 100R
33p R702 220R
R704 1.5K
9V
12
C107 4.7n
crt
4
BA682
R126 4.7k
IC102 155V
R712 100R
3.3V
STAND_BY
0R
AFT BCL
CABEL7B 3.3V
BC848B T417
R484 R414 10k
C410 1n
R417 33k
15k R416 6.8k
V_SYNC
R422
R403
1k
0R
T403 BC848
BC848B T418
R486
13 C408 47n
FBL_OSD
VDDA_2.5V
14
10k
R487
KEY
38
R_OSD
STATUS
17 R421 33k 18
C412 47n
R423
CABEL6B
19
C414 10n
10k
AFT
POWER_CTRL
IC403 TSOP1838
10k
4
470R
23
C416 220p
R434 ***
25
220R
MULTIMEDIA
Q401 6MHz
3.3V R464 8.2k
SK201 SCART
SDA R488 2.7k Au d i o G N D
C426 10u/16V
R465
3.3V
5V
30 C427 47n
R201
R468 4.7k T415 BC848
*** C428 100p
D406
100R R470
27
3.3V
R203 82R
5V C429 100p
100R R471 4.7k
SDA5535
R204 82R
R472 4.7k
T407 BC848
R443
5
IF2
IF1
+33V
n.c.
+5V
+5V
SDA
10
9
8
7
6
5
11
9V
R221 0R
C207
LL' = 220R
T202 BC848
1k
R210
C202 1n
C203 220p
1k
1
1k
4
R224 0R
R175
15k
C209 220p
10
JUMPER R134
0R
75R
VERT_OUT
C145 470n
C148
45
SAW TOOTH
100n C150
44
AUD_DECOUPLING
R_OUT
AFC1
G_OUT
HORIZ_OUT
R136
75R
12
R242
0R JUMPER
L103 47uH /LAL03
1
R226 33k
FRONT_AV_1
C131 10n
C132 100u/16V
PAL
F103
10u/16V
1
10pF R137 0R
LL'
4.43MHz
B_OUT
R148
42
C135
PAL=0R
T201 BC848
R172 0R
39
VCC
IF
19
F104
35
VCC 4.7V
IF
R233 1k
R234 1k
2
R235
5
1k
C136 22
470R
OPTION-RGB
C174 330pF
31
BLK.LEVEL
23
AFT
30
AUDIO_OUT
0.47u/50V
R230 390R
SERVICE
180k
C137 10n
R241 CABEL4B T205 BC848B
R231
10k
R240 10k
3
82k
C138 10u/63V
R141
C141 C139 56p
100R
AUDIO_IN
IF_AGC
SIF_IN
VAPC
Q DET
100R R160
29 C165 470p 28
26
R232 390R
1
R229 T204 BC848B
10k
0R
10k
C166 47n
R163 1k
27
LL’
R177 22k
9V"
LL’
NN5198K R161
CABEL5
R238 10k
R243
R228 10k
FR_AV MODUL R142 1k
C143 0.47u/50V
1k R162 560R
JUMPER
C167 10n
F105 5.5MHz R164 1.5k
T109 BC848
R165 1k
AFT
STAND_BY
KEYBOARD
R239 10k
T206 BC848B
R178
L = 10k
2 LED
R158 0R LL' C164 4.7u/16V
1k
220n
9V C142 120p
390R
25
VIDEO_IN
220R non-L
R159 L= 1k
R139 24
C162 1.5n
C163
10n
9V
R157
32
EXT_AUDIO_OUT
AGC
R173 0R JUMPER
RB411D
C161 47u/16V
47n
R138
K9656M
R217 75R
QSS_IN
CVBS_TXT
R155 470R
9V
33
VCC
5V"
D105
1k
21 CABEL1B
ZD101 6.2V
R154 330R
R156
34
EXT_VIDEO_OUT
GND (IF)
R150 470R T107 BC848
0.47u/50V
47n C159
4 20
10n
R152 1.5k
C158
1k
C160
1
C156
R153
36
VIDEO_OUT
SECAM 18
C155 47u/16V
C157 220p R151 4.7M
9V
37
C.APC2
SECAM BELL
H_DRIVE
R149 270R 0.5W
9V
3.58MHz
38
VID_IN_SYNC
68R 2 CABEL1A
6.8k
22p
5 1
10u/63V
C154 2.2n
C153
40
HOR_SYNC
SECAM PLL
17
0.47u/50V
G1985M
R147
41
3.58
4.43
16
CABEL9A 2
C152
43
H_VCC 6.3V
GND (VCJ)
15
C134 220p
L106 2.2uH
10n
C151
Q101
C133 0.47u/50V SECAM
4
R227 2.2k
V_DRIVE
10k
C149 220p
9V
IF2 T203 BC848
R146
46
Q102
R140
1
G_IN
C147 100u/10V
C146 10n
47
5V
220R
X202
R206 82R
VERT_AGC
75R
R135
FRONT_AV_2 D407 1N4148
T416 BC848
R_IN
VCC
14
9V
R215
48
VDD
B_IN
9V R225 33k
L104 47uH /LAL03
10u/63V
IF1
3 2
9V
C206 470p
8
C129 47u/16V
C130
C208
R213
C205 220p
7
C128 10n
LL'=270R
FR_AV C210 220P
5
NON-FR.AV
C204 15k 470p
R212
LL 49
SCP CW OUT
FBL_IN
13
9V X201
AV_SEL
R211
VSS (CMOS)
ABCL
6
LL'
680R
R223 560R
100R C201 1n
50
CRT
R208 560R L'L = 220R
4
9
5
4 IR
4.7u/63V
C.APC1
11
2
3.3V
C123
X101
4
RGB=470R
R145 100R
51
SDA
C144 470p
5
3
1k
9V
R222
47u/16V
R209
R220
52
5V"
LL'=390R %1 R237 220R
H_SYNC
R143 15k R144 15k
R174 0R JUMPER
non-L
R205 82R
3
R441 4.7k
R218 0R
R216 2.2k
X402
SERVICE
15k
R469
28
SDA1
R202 3.9k
1k LL'
R467 4.7k
29
R214 0R LL'
R466
VDD_3.3V
SCL1
SERVICE
R207 560R
4
T406 BC848
KEY
3.3V
31
VSS
2.2n
15k
X404
R130 0R non-L
4.7R 1W
FBP_IN
SCL
3
C126 100n
9V
33V SCL
32
VDD_3.3V
AV_SEL
C418
C430 100p
R437 47k
R440
R439
C121 100n
TEST
2
C125 100n
D412
LL'
33
L/L'
T101 BC848
R236 560R
R219 0R
C425 33p
AV/TV
IR
26
1
C120 220u/16V
1
C124 22u/50V
D411
VDD_2.5V'
33p
34
RESET
ON_LINE
P2
2
NC
R129
100R
CABEL8B
1N4148
35
XTAL2
TV/INT
24
C417 10n
3
22
R432
100R
NC
12.5V 2
C127 100n
0R JUMPER
100R
R431 IR
T405 BC848
R433
5
C415 47u/16V
R483 2.7k
NC
10k
R128 33k
220n/16V
3
1
D410
0R JUMPER
1N4148
100R
100R R429
3.3V
1N4148
C424
XTAL1
ODD/EVEN
680R
36
VSSA
V_SYNC
21
220R R428
ZD401 ***
P1
X401
R424 R482 150R
P3
NC
C119 220p
4
IC101
2
37
VDDA_2.5V
H_SYNC
20
3.3V
R427
NC
C122
R107
STATUS
T404 BC848
R127
BCL
10k R108 10k
D106 1N4148
R479
3
C413 220p
R425 ***
NC
R133
CABEL8A
1N4148
R481
1k
DE_INTERLACE
12.5V
VP
R131
R106 100k
100R R460
C423 47n
C411 22n
R420 2.2k
D409 1N4148
1k
C118
5
OUT-
4.7k
100R R459
39
G_OSD
330R
R458
D405
R457
R456
40
B_OSD
VSSA
16
1k
R419
CABEL6A
1k
R455 100R
R402 9V
V_IN
47n
RGP10J
100R
3.3V
NC
C117 100n
6
100n
R104 1k
CABEL4A
47n
VDD_2.5V'
C407 47u/16V
R485 10k
C431 47n
R418 10k
R415
H_SYNC
GND
L105 1uH
L = 12k non L = 0 R
D408 C422
41
1N4148 R105
C101 10u/16V
T410 BC858
T411 BC858
42
VDD_2.5V
CVBS
10k
3.3V
VSS
VDD_3.3V
15 T402 BC848
43 VDD_2.5V
10uH
10n
VSS
11 C406 47n 12
L403 D403 1N4148
C409
1k
GND
7
3
R413
GR
STATUS
3.3V
D404 1N4148
10
C421 47n
VDD_3.3V C405 47u/16V
VDD_2.5V'
C404 47n
VOL
3
4.7k R411 4.7k
non-GR
1.5k
L402 10uH
C403 47n
VDD_3.3V
9V R453 330R
1
R477
3.3V R412
R478 0R
10uH C402 47u/16V
VDD_2.5V
9V
0R
VDD_3.3V 44
5
SW401
SW402
OUT+
8
non_L
C103 100u/10V
C102 47n
7
680R
NC
C114 100n
C104 4.7u/63V
9
SW403
9
11
1.5k
VDD_2.5V L401
R407 1M
R408 1.5k
0R
NC
9
TDA7056AT
R123 10k
T106 BC848
R124 220R
NC
R125
L101 10uH
R103 15k
Secam L only D101
17
R410
9
EXT_IN
DK
MM R452
45
MM
***
13
D402 1N4148
220n 3.3V
20
10
SWITCH
5V
C169 ***
220R
3.3V 8
220R R102
46
RGB_SEL
C168
R101
LNF
R449
47
LNF
7
GR R476
19
R122 10k
15
6
3
48
SCL0
19
5
crt
non-GR R409
SCL
49
SDA0
n.c.
LED
n.c.
4
R406 270R
C401
18
NC
10
C110 CABEL10
2
crt
CVBS_TXT
17
NC
10k
R405 1k
TXT
GND1
21
crt
E0
12
16
9V
C113 1n
CABEL11
13
15
R121 10k
11
V_P2
AF_OUT
1
NC
24C04 R404
CRT
R718 100R
VCC
50
12.6
1
8
4
R717 470R
3
T401 BC858
LED
E1
AM_IN
14
SPEAKER
12
MUTE
AM_OUT
7
14
GND3 GND2
8
1
C706 390p
MODE_WC
VDD_3.3V
15
GND4 2
6
CABEL12
2
2
51
E2
6
C708 100n/250V
SCL
7
3
10
33p
6
TUNER
12
C705
D401 LED
R722 100K/0.5W
R716 2.7k
VOLUME
2
3
1.5K
9V_
T703 BF422
STAND_BY
52
T601 STP3NB60FP
DEGAUSS
12.5V
R605
IN
10 R615 0.1R
22R 0.5W R606
-
14
-
RGP15D C624
R616 240R %1
C627 220u/16V
C626 47n
-
1 2 3
R609 6.8k
4
R610 ***
C613 56p
5
C614 1.5n P601 2.2k
-
-
6 C633 10nF
-7
OTC
VCC
PCS
OUT
RZI
GND
SRC OCI FC2 SYNC
C610 10n
3.9M 1W
IC601
R625 3k3
-
R608
R624 820R
2.2n
PVC FC1 REF PMO
C611 22u/50V
14
1N4148
1.5k %1
9
47uH
SMT
IC604 KA317TU
13 -
T602 BC848
R620 22R 0.5W 13
-
R619 C628 47n
-
IN
12
R618 10k
10k
R506 1R 0.5W C506 330n/63V
11 C615 1uF
R611 39k
10
C616
HS601
9 -
SMPS HEATSINK
-
-
8
C629 47n R622 390R %1
C507 15p
PUMP
BCL
2
H_DRIVE
H_SYNC
DE_INTERLACE
1
T505 BC848
47u/35V T506 2SK3065
680R R537 10k
EHT C513
R518 27R 0.5W
R521 ***
6.8n/1.5kV
R505 10k
L502 H-LIN
R513
C524 4.7n
R528
11
R522 4.7u/160V C516 22k 0.5W 390n/250V
D502 BA157
6
9V
C517 560p 500V
R512 10k
R511 10k
3 2 CABEL7A
D504 BA157
5 X502 HORIZONTAL
C522 10u/250V
R530 C510 R507 8.2k
R514 2.7R 0.5W
T501 BC848
3.3R 3W
R515 2.7R 0.5W .
.
.
R524 C525 33p
-
TDA16846
C519
ZD503 9.1V
4.7k
C528
100p
15k
100k %1
100k %1 R540 33k %1
R525
ZD504
33V
33n/100V
X503
1
3
1.8R 1W 2
10
25V
CABEL9B 4 8
R612
R539
D505 RGP15J
X501
2.2n/250V
R538
R541 4.7k
R516 22k
T502 BC848
R527 3.3k
C521 100n/63V
100n/100V
470R 0.5W
R509 22k
R508 100k
10k
C520
7
3
1
1000u/25V
C632 100u/10V
R526 15k
G2
R523
R510 10k
C509 10u/63V
D503 1N4148
12.5V FOCUS
R504 56k
VERTICAL -
T504 BU808DFI
2.2uH
T507 BC848
OPT.TXT C508 1n
C511 4.7n C631 47n
C630 47n
C512 R536
D506 1N4148
C504 10n
100u/35V
ZD502 39V
3.3V
R621 240R %1
TR501 9
L501
4
ZD501 39V
OUT ADJ
R517 82R 3W
C503 C505 10n/100V
470R 0.5W R613 4.7M 0.5W
C527 100u/16V
C515
2
R607 33k
R617
L602
HS502
9V
R535 3.3k
R532 22k
C502 10u/63V
56k
D501 RF2007
.
C625 47n
12 D606
C609
C529
R533 5.6k
R534 1k
R503
4.7n
9V
1M 1W C612 560p
R502 2.7k
C501 47u/16V
OUT ADJ
1000u/25V
C622 47n
IC602 KA317TU
D608
C608 470p/2kV
GND
R520 100k
9V
7
C607 10n/250V
C621 10n
HS602
VCC
5
-
INV_INP
-
6
R604 PTC
R501 3.9k
C623 100u/10V
9V
C526 220n
R519 4.7k
R529 0R JUMPER
5V
OUT
9V
AN5539-LF
5
IN
REGULATOR HS
IC501
9V
IC603 7805
1 2
ZD601 33V
C620 10n
C619 33u/160V
6
D605 RGP10J
39k 0.5W
DC_INP
C605 68u/400V
C618 47u/160V
FLYBACK
LINE FILTER
50uH
RGP15J
4
POWER SWITCH
C606 33n/630V
R603 68k 1.5W
R614
3
MAINS
D604 RF2007
L603
OUT
D602 RF2007
D607
GND
C604 1n/1kV
HS501 TR601 1 2
330n/275V
3
X602
RF2007
2
2
D603 RF2007
D601
C603 1n/1kV
1
2
C602 100n/275V
C601
1
T 2.5AH 250V R623 470k 0.5W
VERTICAL HEATSINK
2
2.7R 5W
4
107V
220p/2kV
1
F601
1
1
C617
2
X601
L601
V_DRIVE
R601 SW601
V_SYNC
HOT HEATSINK
1
R715 220R
GND
TU101
3.3V
X703
SDA
C109 4.7u/16V
13
2
C111 47n
13
GND
NC
C112 47u/16V
14
V_P1
C_REF
5
4
AGC
155V
R714
C108 4.7u/16V
JUMPER
15
NC
C_AGC
3
16
IF_IN
NC
3
IC402
IC401
1
2
4.7k
TDA9380
IF_IN
4
T102 BC848
C170 470P 5
R401 3.3k
1
T105 BC848
non-L = 0 R
R445 10k
crt
R713 15k 1W
L/L'
T104 BC848
R120 10k
1
crt 155V
R444 15k
C419 4.7u/16V
R109 4.7k
14
AQUA
C704 390p
R711 470R
SMPS
T103 BC848
IC103
22k
R119
16
C703 33p
10k
R112 4.7k
3
R113
X102 R118
1.5K R710 2.7k
X701 CRT
5
BA682
C106 68p
4
9V_
T702 BF422
2
5
(M) R720 220R(opt)
R709 220R
1
(N)
2
12
R708
18
4
C707 2.2n
R707 15k 1W
11
D103
20
crt
KEY
3
R117 2.2k
F101 40.4MHz
9V
G2
8
2
C523 1000u/35V
2 1
FBT CRT
JUMPER
R531 0R
Subject to change without notice
