MODEL CT-2 137F/UKT
Contents
1. navy omo ov 120v 12307 18V osv 18 osy 4V sm orv aav sme ov iov smi poe ema 27v ov 9mm sov ov Lem sov ov _ ommo ov sv _ x rm su Fame wT E ems ov 126v mev eme sov ov 5 4 SCREEN G2 adjustment 1 Use the pattern generator PM5518 to input a black signal into AV 1 EURO socket 2 Set the TV s contrast to minimum and the brightness to the centre position with the remote control DC OV SCREEN 5 5 Focus adjustment 1 Use the pattern generator PM5518 to input a cross hatch signal into AV 1 EURO socket 2 Set the contrast to the 1 3 position of the control range and the brightness to the centre position with the remote control unit 3 Adjust the FOCUS on the FBT so that the focus adjustment zone s sharpness is optimum as shown Focus Adjustment Zone Fig 5 7 5 6 TUNER adjustment 5 6 1 AFC adjustment 1 Set the RF output frequency of the pattern generator PM5518 to exact 38 9 MHz carrier only except UKT or exact 38 5 MHz carrier only UKT only IF carrier frequency with 80 dByV sensitivity 2 Connect the RF output of the pattern generator to the 8 pin of the TUNER unit 3 Connect the DC voltmeter to the resistor 9R12. ADJ VR6PZ LINEARITY ADJ VR6P3 VERTICAL PHASE ADJ 10 11 e E 5 O 41IC1 TDAS 1010 e BALANCE ADJ a SET LZ SOCKET orc AUDIOTUNER qun EAKER 5 MODEL a Ad INDIQUE LES COMPOSANTS CPH a CRITI DE SECURITE POUR MAINTENIR FILL h HE REPT Sea GORE BES TET Hoc IP son RECOMMANDEES ABRICQNT PAR LE Fi ou rer Ar F eA 2 rr Y s Un Ti ere 9 GND MGND Ae AE MEET MATN POWER 46 STRS DTC143TS VID 6 F1Q sena ASE STRI DTC143TS bus main bus data bus signal 4208 9 HS 1 AGND eR i maa Eis ge t RARE T ra VR6PI VERTICAL SIZE ADJ VRGP2 LINEARITY ADJ VR6EP3 VERTICAL PHASE ADJ 28 Ge BEAHIN 0 on BT 0 rs f AUDIO ecd nv R94 RIG SRS i SR16 5 iK S A 0 SRL Pu TRANS OTH 0 LINE mie E E ia 5 lzev roo oe K Qe U samt E sa D ix l at Sie Wa scio saz Pam 4 h aceas BZ 4 oe due pini 2 155 1 wm SPEAKER me STRI 016154465 9 E sy li 6 TP oz o CT 2137 F UKT 0 E CT 2157 D DT E ET F P PT UKT Video Signal Line CTV Schematic diagram s sa RGB Si
3. 4 Select the menu STD 2 and a UHF band at the beginning of the bargraph with the remote control unit 4 Adjust the 3L2 coil so that the meter indicates 3 4 0 4 V 5 6 2 AGC adjustment 1 Use the pattern generator PM5518 to input the 60 dBu V 1mV sensitivity RF UHF signal into the ANT IN terminal 2 Connect the DC voltmeter to the anode of the 3204 3 Adjust VR3P1 so that the reading on the meter is 8 0 5 V E LIE UE E ESSE Pa 3 Using an oscilloscope measure the cathode voltages at the resistors 41R4 R 41R9 G 41R14 B on the SOCKET PCB and confirm which point is the highest 4 After measurement adjust SCREEN on the FBT so that the highest of the above three points becomes 150 V as shown LRL LRL LIS 5 7 White balance adjustment 1 Set the contrast to the 1 4 position 130cd 10 in white signal and brightness to the 3 4 position 2cd 0 2 in black signal with the remote control unit 2 Usethe pattern generator PM5518 to input a white signal into AV 1 EURO socket 3 Attach the sensor of the colour analyzer on the TV screen 4 Adjust VR41P1 and VR41P2 on the SOCKET PCB so that the X and Y values are indicated within the following values of the coordinates of the colour temperature 5 Use the pattern generator PM5518 to input a black signal into AV 1 EURO socket 6 Adjust VR41P3 and VR41P4 on the SOCKET PCB so that the X and Y values are indicat
4. LSLELI LELE LD COLOUR TELEVISION SPECIFICATIONS Broadcasting form 2157D DT 2157E ET 2137F 2187 2157F PT 2137UKT 2157UKT Selection form Programme channel Receive channel 2157D DT System BG System DK 2157E ET 2157P PT System BG 2137F 2157F System LL ng BG LL PAL SECAM PAL SECAM PAL SECAM VHF ch 2 12 UHF ch 21 69 Cable ch S01 S03 S1 S41 VHF R1 RX11 4 9 UHF ch 21 69 VHF ch 2 12 UHF ch 21 69 Cable ch S01 S03 S1 S41 VHF ch2 4 5 10 UHF ch 21 69 Cable ch B Q MODEL CT 2157D MODEL CT 21 37r ukr MODEL CT 2157D DrT E ET F P PT UKT System BG System 2137UKT 2157UKT System Music power Power requirement 2137UKT 2157UKT Except 2137UKT 2157UKT Power consumption CRT size AK AI Service MANUAL VHF ch 2 12 UHF ch 21 69 Cable ch S01 S03 S1 S41 UHF ch 21 69 VHF 1A 1J Ireland Cable S01 S03 S1 S41 UHF ch 21 69 VHF 1A 1J Ireland Cable S01 S03 S1 S41 5 W RMS 230 V 240 V AC 50 Hz 230 V AC 50 Hz 60 W 21 inches Picture 51 cm 530 W x 450 H x 474 D mm 2 600 W x 575 H x 565 D For improvement purposes specifications and design are subject to change without notice STRI DTC 439S 32D4 1N4148 pm ee we main bus data bus signal VR6PI VERTICAL SIZE
5. Press the yellow button once Then at the same time the EXT character by yellow colour is changed to white character Choose required EXT number with 1 3 button Press the red button to memorize Press the TV button to return to normal picture SPECIFICATION Description Product 2137F 2137UKT 2157P 2157 2157F 2157D 2157PT 2157ET 215707 2157UKT S P T A A Country L N ma fefefe w e e e w EIE 80 a SE TS E EE ELLE Sed 9 88 o eia sele ajai 1 Fee Input Video Standard E1 Scart 1 E2Scat2 Video E2 Scart 2 aa RCA Head Phone Jack Phone Jack Teletext Euro Standard Euro r 34 AU a R A 0 NA P DV E 1 A lt z gt DIDN Em SERVICE MANUAL
6. ed within the following values of the coordinates of the colour temperature X 0 295 0 010 Y 0 303 0 010 8000 1200 K According to CIE xy chromaticity diagram If results are not satisfactory repeat adjustment from steps 5 7 4 to 5 7 6 untill correct white balance is obtained NOTE If there is no colour analyzer available adjust VR41P1 VR41P2 VR41P3 and VR41P4 so that the correct white picture is obtained am VLL POET 14 Sika Sm mmm wml 1 111111111 0 000 0 100 0 200 0 300 0 400 0 500 0 600 0 700 0 800 R CIE Fig 5 8 n n np SERVICE MANUAL VI FACTORY MODE In the Akai factory we choose for each model standards and external inputs enable according to each destination When the Main P C Board or EEPROM in the Main P C Board is replaced for any reason memorize the content according to the following procedure 1 Press the buttons DISPLAY on the remote control continuously Then a menu display appears on the screen as shown below SCeEP GREEN Choose YELLOW A Choose external inputs enable Buttons STD 1 3SECAML U Red STD 2 PAL SECAM B G STD 3 PAL I SECAM D K EXT 1 SCART 1 EXT 2 SCART 2 EXT 3 RCA in the front panel Press the green button once Then at the same time the STD character by green colour is changed to white character Choose required STD number with 1 3 button
7. gnal Line N QF 001 F 301 le MEASURED VOLTAGES OF THE SEMICONDUCTORS ICS 0IC1 4IC1 1 81C1 811C1 9IC1 C LY 3 2 V 5 9 V 5 59V 1 6 V 3 8 V 3 2 V 17V 8 47V s5 rs s 23v s sev 7 ERE 3 5 Eg EN EH N a wjn 5 1 V ze N ISO AihloOloi a lt lt lt lt lt lt N eo o QIN 1 N lt 51V 47 V o 272v 9 25v eo sev 8 0 V ETT MESSEN 33 V 44V 3 9 V i4 14 38 V 0 7 V 16 12 28V ov 01C1 19 20 20 20 20 22 21V EEE 18V 26 5 8 V 38V 88V so 15 16 48 0 22V 37 V 2 0 V 5 36V 8 0 V 3 6 V 5 0 V 44V 12V 111C99 05V 18V 3 1 V 4 0 V 3 5 V 1 0 V 5 5 6 4 55 5 5 5 8 5 9 5 5 8 8 5 9 8 8 9 jr gt wa to lt lt lt to 4 o oo OL ain m lt lt lt lt lt lt lt FSFESESESESESESESIA 5 5 9 9 8 5 5 5 8 9 5 gt o lt Voltages indicated above were measured when an RF signal was being received However the DC voltmeter s negative input was connected to the M GND when the primary section was measured TRANSISTORS ora ov zov oiTR2
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