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ELECTRICAL ADJUSTMENTS ACCESSING THE SERVICE MODE
BEKO Chassis 12.6
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 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.).
BGBPF VIDEO
8. PRESET VALUES OF SERVICE MENU ITEMS
Below given values are average values and can vary according to the CPT type and chassis type.
AFT33 (Sec L') 61 61 61 2.AGC (1)
G.CUT
R.CUT
VIDEO
OSD.H
S.COR
R.DRV
V.POS
H.POS
B.DRV
14" 20" 21"
SIZE
46 46 46
46 46 46
OLD OLD OLD
14 13 14
4 4 4
64 80 81
46 47 47
0 0 0
1 1 1
25 25 25
33 33 33
64 40 40
65 40 40
64 40 40
59 58 55
53 59 56
0 0 0
48 48 48
SECBL
OSDV
LNRTY
Y.DLY
AGC
V.HEI
S RN
40 40 40
(1) Please see Section 3 AGC Adjustments.
Figure. Service Remote Control
AFT38
B.CUT
12.6 CTV CHASSIS
G99.820
155V
CRT BOARD
C709 10u/250V 155V R701 15k 1W 9V_ BF422 T701 C701 (N) 33p R702 220R 9V_ (M) R719 220R(opt) R705 470R crt crt R703 2.7k
R721 220R D701 1N4007
X702 CRT SOKET GND GND n.c. 4 12 11 R704 1.5K 5 G1 10 6 9 GREEN G2 7 8 HT RED C107 4.7n D102 1 BA682 IC102 R115 4.7k R116 4.7k F102 K9456M 4 R126 4.7k NC NC NC VOL GND V_IN VP NC NC NC 10 9 8 7 6 5 4 3 12.5V 2 1 C120 220u/16V C121 100n R129 4.7R 1W R130 0R non-L C119 220p 220n/16V R128 33k C117 100n 100R VOLUME HT BLUE L102 10uH 9V" R114 9V
C702 390p R706 100R
1 2 3 4 (N) 5 X701 CRT R709 220R crt
155V R707 15k 1W T702 BF422 9V_ R710 2.7k C703 33p R711 470R C704 390p R712 100R crt 155V R713 15k 1W R714 R715 220R T703 BF422 9V_ 1.5K R722 100K/0.5W 155V X703 3 D401 LED C708 100n/250V 2 1 CRT crt crt R405 1k R406 270R LED T401 BC858 R404 10k SCL0 crt R401 3.3k STAND_BY 3.3V 2 51 VDD_3.3V 8 3 12.6 50 1 IC401 STAND_BY VOLUME 52 6 7 AQUA SMPS C419 4.7u/16V 3.3V R445 10k 5 SDA SCL MODE_WC VCC 24C04 R444 15k L/L' non-L = 0 R C170 470P IC402 GND E2 E1 E0 4 TU101 3 T102 BC848 C707 2.2n R708 1.5K R112 4.7k R109 4.7k G2
9V
F101 40.4MHz C106 68p
R117 2.2k
D103 2 BA682
3
11 5 12 X102 R118 22k T104 BC848 T105 BC848 1 2 3 IC103 IF_IN NC C_AGC C_REF NC AM_OUT AM_IN AF_OUT TDA9380 IF_IN NC V_P1 GND MUTE V_P2 SWITCH EXT_IN 16 1 15 14 13 12 11 10 9 R124 220R T106 BC848 R123 10k C113 1n C111 47n R121 10k R122 10k C112 47u/16V SPEAKER 9V 15 16 17 18 19 20 2 13 14
NC NC NC OUT+ GND NC OUTNC NC NC TDA7056AT
(M) R720 220R(opt)
R113 10k T103 BC848
R119 4.7k R120 10k
C118 R127 10k
3 4
JUMPER
C108 4.7u/16V C109 4.7u/16V 15 14 13 12 CABEL10
+33V
5 6 7 8
TUNER CABEL12 GND4
2 1
GND3 GND2 GND1
CABEL11 C110 100n
C705 33p R717 470R R718 100R crt
R716 2.7k C706 390p
AGC
SDA
SCL
+5V
n.c.
n.c.
n.c.
IF1
LED
SDA0
IF2
4
49
+5V
6
LNF
47
R449
LNF 0R
R101 220R R102 220R *** C169 ***
11
C168
10
5
48
C114 100n R125 non_L 1 R131 DK C122 47n R133 4.7k 100R C123 4.7u/63V 3 C.APC1 VSS (CMOS) TEST IC101 FBP_IN 52 R143 15k R144 15k
BCL H_SYNC
1
2
3
4
5
6
7
8
5V
9
7 3.3V TXT CVBS_TXT GR R476 non-GR R409 1.5k SW403 SW402 R410 680R SW401 R478 0R R477 STATUS AFT BCL 3.3V R414 10k 1.5k GR non-GR R413 1k CABEL7B R484 3.3V R418 10k T403 BC848 R486 1k 1k R487 CABEL6B 10k C431 47n 3.3V BC848B T418 CABEL6A D409 1N4148 R485 10k 9V R419 10k R402 1k R420 2.2k C412 47n C411 22n 16 BC848B T417 R411 4.7k 0R 3.3V R408 1.5k C401 220n R407 1M
KEY
RGB_SEL
46 MM R452 0R C421 47n 43 VDD_2.5V T411 BC858 C422 47n 41 R455 R456 100R R458 100R R459 100R R460 100R VDD_2.5V' 330R R457 680R RGP10J D405 1N4148 R479 0R JUMPER 9V R453 330R T410 BC858 D408 CABEL4A C101 10u/16V 9V
L101 10uH
C104 4.7u/63V
L105 1uH
2
SCL
SDA
51 C144 470p 50 LL 49
R145 100R
8 D402 1N4148 VDD_2.5V L401 10uH C402 47u/16V 3.3V R412 4.7k C404 47n VDD_2.5V' L402 10uH C405 47u/16V 3.3V D403 1N4148 VDD_2.5V' 13 C408 47n VDDA_2.5V VDD_3.3V 11 C406 47n 12 VDD_3.3V C403 47n 9 VDD_2.5V
MM
45 VDD_3.3V 44
Secam L only D101 1N4148 R105 L = 12k non L = 0 R
R103 15k
C102 47n
C103 100u/10V
R104 1k
VDD_3.3V
4
ABCL
SCP CW OUT
10
VSS
VSS
R106 100k CABEL8A R107 10k R108 10k CABEL8B
T101 BC848
C124 22u/50V C125 100n C126 100n C127 100n
5V" 5 FBL_IN VDD 48 C146 10n C145 470n 46 C149 220p R146 10k
L104 47uH /LAL03 C147 100u/10V
5V
VDD_2.5V
42
6
R_IN
VERT_AGC
47
CVBS
FBL_OSD
D106 1N4148 D410 1N4148 D411 1N4148 D412 1N4148
7
G_IN
VERT_OUT
V_DRIVE
D404 1N4148 C409 10n
L403 10uH C407 47u/16V
B_OSD
40
8
14
VSSA
G_OSD
39
R236 560R 9V
9V
B_IN
SAW TOOTH
45
C148 100n
R174 0R JUMPER X101 1 2 R175 JUMPER 0R R135 R136 CRT R134 75R 11 4 5 75R 75R 12 G_OUT HORIZ_OUT 42 C128 10n C129 47u/16V 10 9 VCC AUD_DECOUPLING 44 10u/63V R_OUT AFC1 43
C150 C151 C152 10n R147 6.8k R149 270R 0.5W C155 47u/16V 9V C156 9V C157 220p R151 4.7M R152 1.5k 10n T107 BC848 R150 470R ZD101 6.2V 9V
15 T402 BC848 R415 1n 15k R416 6.8k R422 1k DE_INTERLACE C413 220p 12.5V R425 *** ZD401 *** 3.3V R482 150R 3.3V R483 2.7k P1
IR
KEY
R_OSD
38
C410 H_SYNC
STATUS
VDDA_2.5V
37 C423 47n
R481
LL' R219 0R 33V LL' = 220R R209 R208 560R L'L = 220R R210 C203 220p 1k 100R C201 1n R211 C204 15k 470p R213 15k C206 470p 9V C209 220p 9V C202 1n AV_SEL NON-FR.AV R224 0R X201 5 4 3 2 R242 FRONT_AV_1 1 C207 47u/16V non-L R221 0R
R218 0R
LL'=390R %1 R237 220R T202 BC848 R222 9V LL' R220 1k RGB=470R 3
R148 220R
10u/63V
H_DRIVE
0R JUMPER C424
R417 33k
V_SYNC
R403 0R
17 R421 33k 18 R423 1k 20
AFT
VSSA
36 33p SCL Q401 6MHz C425 33p 33 C426 10u/16V R465 100R R466 1k LL' R467 4.7k C427 47n T415 BC848 R468 4.7k *** D406 R469 100R R470 100R 3.3V 5V C429 100p R471 4.7k X402 4 R472 4.7k R203 82R R204 82R R205 82R C428 100p
14
B_OUT
H_VCC 6.3V
41 Q102 C154 2.2n
POWER_CTRL
XTAL1
35
R207 560R SDA SK201 SCART
1
3.3V R464 8.2k
3.3V R488 2.7k
R223 560R FR_AV C210 220P
680R LL'=270R
13 C130 Q101 14 9V IF2 L103 47uH /LAL03 F103 1 R227 2.2k 4 LL' L106 2.2uH C131 10n C132 100u/16V R137 0R PAL 10pF C133 0.47u/50V SECAM C134 220p
PAL=0R
GND (VCJ)
3.58
40 3.58MHz
C153 22p
19
H_SYNC
XTAL2
34
9V
IF1 4.43MHz
4.43
HOR_SYNC
39
3
V_SYNC
RESET
Au d i o G N D
2
R424 220R R428 100R R429 100R R432 470R R434 *** C416 220p
C208
R225 33k
15
SECAM PLL
VID_IN_SYNC
38
21
6
ODD/EVEN
AV/TV
32
R214 0R LL' R202 3.9k R201 15k
T203 BC848
4
5
C158
16
VCC
C.APC2
37 R153 1k 0.47u/50V D105 5V" R173 0R JUMPER R154 330R R155 470R
T404 BC848 R427 10k C414 10n
22
VDD_3.3V 30
9
TV/INT
L/L'
31
3.3V
5V
8
R212 1k C205 220p
10u/16V R226 33k CABEL9A
7
17 C135 0.47u/50V SECAM 18
SECAM BELL
VIDEO_OUT
36
CVBS_TXT
ON_LINE
VDD_3.3V
11
P3
C415 47u/16V
10
23
0R JUMPER
12
IF
VCC 4.7V
35
R431 100R
13
47n C159 R156 1k 9V
RB411D
24
IR
VSS
29
2 G1985M
5 F104 1 4 20 GND (IF) VCC 33 C160 19 IF EXT_VIDEO_OUT 34
16
15
X401
5 4 3 2 1
19
10k C417 10n
IC403 TSOP1838
18
P2 26 C430 100p C418 2.2n
AV_SEL
SCL1
17
R433
T405 BC848
25
28
R215 68R
T201 BC848
R172 0R X202
3
47n C174 330pF
C161 47u/16V R157 C162 1.5n 220R non-L R158 0R LL' C164 4.7u/16V C166 47n 9V" R177 22k LL'
SERVICE
SDA1
20
27
21 2 CABEL1A 1 CABEL1B R233 1k R234 1k R235 1k
3
21
QSS_IN
EXT_AUDIO_OUT
32
R439 220R T406 BC848
R440 15k T407 BC848
R437 47k
SDA5535
SERVICE
R216 2.2k
2 K9656M
5
R138 470R C136 22 10n 23 AFT AUDIO_OUT 30 AGC BLK.LEVEL 31 C163 0.47u/50V
FRONT_AV_2 T416 BC848 D407 1N4148
STATUS
MULTIMEDIA X404 KEY 5 3.3V 4
R441 4.7k
3 R443 1k 2 1 SERVICE
R206 82R
R217 75R R230 390R R231 390R T205 BC848B R240 10k R241
OPTION-RGB
R140 CABEL4B 10k C138 10u/63V 82k
9V R139 180k R141 100R C139 56p
R159 L= 1k 100R R160 L = 10k
24 C137 10n C141 220n 26 25
VIDEO_IN
AUDIO_IN
IF_AGC
SIF_IN
29 C165 470p 28
1k
R178 10k LL'
IR
3 2
9V C142 120p
VAPC
Q DET NN5198K
27
R163 1k C167 10n
LED KEYBOARD
1
R232 390R T204 BC848B
R229 10k R228 10k
T206 BC848B R243 0R JUMPER
R239 10k
FR_AV MODUL R142 1k
R161 CABEL5 C143 0.47u/50V 1k R162 560R
F105 5.5MHz R164 1.5k T109 BC848 R165 1k
R238 10k
STAND_BY
AFT
HOT HEATSINK
H_SYNC V_SYNC H_DRIVE V_DRIVE
R601 SW601 X601 1 2 2 MAINS POWER SWITCH LINE FILTER 3 1 4 T 2.5AH 250V R623 470k 0.5W C601 330n/275V C604 1n/1kV D602 RF2007 D604 RF2007 C605 68u/400V F601 L601 2.7R 5W C602 100n/275V C603 1n/1kV D601 RF2007 R603 68k 1.5W C606 33n/630V D605 RGP10J 5 6 D603 RF2007
DE_INTERLACE
C617 TR601 1 2
220p/2kV L603 50uH C618 47u/160V C619 33u/160V
107V
VERTICAL HEATSINK HS501
9V C526 220n R520 100k R532 22k D506 1N4148
9V
9V
9V
1
HS502
TR501 9 T504 BU808DFI C513 R521 *** 6.8n/1.5kV D503 1N4148 EHT
D607 RGP15J
R614
1
39k 0.5W C620 10n ZD601 33V IC603 7805 5V
2
R519 4.7k
R533 5.6k
R535 3.3k R536 T505 BC848 680R
C527 100u/16V
R517 82R 3W C512
L501 2.2uH R518 27R 0.5W
IC501
AN5539-LF R529 0R JUMPER
FLYBACK INV_INP DC_INP
9V
PUMP
OUT
X602 1 2 DEGAUSS C607 10n/250V
R604 PTC
T601 STP3NB60FP R605 22R 0.5W R606 1M 1W
-
HS602 IC602 KA317TU
IN OUT ADJ
C621 10n
GND
C623 100u/10V C622 47n 9V . C501 47u/16V
VCC
REGULATOR HS
GND
IN
OUT
R501 3.9k R502 2.7k C529 4.7n
R534 1k C502 10u/63V R504 56k T507 BC848
R537 10k
47u/35V T506 2SK3065
2
R503
1 2 3 4 5 6 7
12.5V FOCUS
1
12.5V C608 470p/2kV D608 10 R615 0.1R 14 RGP15D C624 1000u/25V 12
2
D501 RF2007 C503
56k
R505 10k C515
L502 H-LIN 4
G2 11 R523 6 3 470R 0.5W 2 1 D504 BA157 C522 10u/250V 3 7 C520 100n/100V R528 10k
R526 15k
BCL
C625 47n R617 1.5k %1 R620 22R 0.5W
R616 240R %1
R527 3.3k
C626 47n
C627 220u/16V R619
R506 1R 0.5W C506 330n/63V
C505 10n/100V
ZD501 39V ZD502 39V 100u/35V C507 15p R510 10k R511 10k
C504 10n OPT.TXT C508 1n 9V
C612 560p R625 3k3 -
R607 33k -
C609 2.2n 1 2 3 R624 820R IC601 OTC PCS RZI SRC OCI FC2 SYNC TDA16846 R612 15k VCC OUT GND PVC FC1 REF PMO 14 13
D606 R608 3.9M 1W C610 10n C611 22u/50V 1N4148
L602 47uH 9
C628 47n T602 BC848
D502 BA157
R522 4.7u/160V C516 22k 0.5W 390n/250V
C521 100n/63V
C517 560p 500V
R618 10k
10k
CABEL7A R538 100k %1 R539 100k %1 R540 33k %1 R541 4.7k ZD504
13 12 11 10 9 8 R611 39k C615 1uF SMPS HEATSINK HS601 -
SMT
R512 10k C510 1000u/25V R507 8.2k R515 2.7R 0.5W . T501 BC848
R508 100k
R509 22k R530 3.3R 3W
5 X502 HORIZONTAL
33V
IC604 KA317TU
IN OUT
3.3V
R513 470R 0.5W
C509 10u/63V
R609 6.8k C613 56p
R610 *** C614 1.5n
4 5 6 C633 10nF -7
R613 4.7M 0.5W C616 C629 47n R622 390R %1
ADJ
R621 240R %1 C631 47n C630 47n C632 100u/10V
C511 4.7n
C524 4.7n
R514 2.7R 0.5W
T502 BC848 . .
R516 22k C519
D505 RGP15J R524 C525 33p ZD503 9.1V 4.7k R525 1.8R 1W 2 CABEL9B 4 8 C523 1000u/35V 2 1 CRT 10 25V 1 X503 3
X501 33n/100V
-
P601 2.2k
-
-
2.2n/250V -
1
-
2
1
VERTICAL
2
C528
100p
FBT
JUMPER
R531 0R
Subject to change without notice