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Sanyo CE14A2-C Service Manual
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Sanyo CE14A2-C Service Manual

Sanyo CE14A2-C Service Manual

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Service Manual
Colour Television
Indice
1.
Safety instructions............................................................................................................................................ 1
2.
WARNING........................................................................................................................................................ 1
3.
Precaution against X-Rays............................................................................................................................... 1
4.
Recommendations to protect our environment................................................................................................ 1
5.
TECHNICAL CHARATERISTICS. ................................................................................................................... 2
6.
Safety ............................................................................................................................................................... 2
7.
EMC (Electromagnetic Compatibility) .............................................................................................................. 2
8.
CONNECTED DOCUMENTS. ......................................................................................................................... 3
9.
MOUNTED CIRCUITS CODES. ...................................................................................................................... 3
10.
ABBREVIATIONS USED IN THE PARTS LIST AND CABINET PARTS LIST. ........................................... 3
11.
CABINET PARTS LIST ................................................................................................................................ 4
11.1.
CABINET PARTS LIST OF CHASSIS CE14A2-C Y CE14A2-E........................................................... 4
11.2.
CABINET PARTS LIST OF CHASSIS CE14AS2-F. ............................................................................. 5
11.3.
CABINET PARTS LIST ......................................................................................................................... 6
12.
PARTS LIST ................................................................................................................................................. 7
Give complete "SERVICE PART No" for parts order or
servicing, it is shown on the rating sheet on the cabinet
back of the TV set.
17-07-2000
Models:
CE14A2-C
CE14A2-E
CE14AS2-F
CRT 14" Philips A34EAC01X06
CHASSIS 2112
EC7-A
Note
This TV receiver will not work properly in foreign countries
where the television transmission system and power
source differ from the design specifications. Refer to the
specifications for the design specifications.
Ref. Nº MS CE14A2-C

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Summary of Contents for Sanyo CE14A2-C

  • Page 1: Table Of Contents

    MOUNTED CIRCUITS CODES........................3 ABBREVIATIONS USED IN THE PARTS LIST AND CABINET PARTS LIST..........3 CABINET PARTS LIST ..........................4 11.1. CABINET PARTS LIST OF CHASSIS CE14A2-C Y CE14A2-E............4 11.2. CABINET PARTS LIST OF CHASSIS CE14AS2-F................5 11.3.

  • Page 2: Safety Instructions

    1. Safety instructions Read this page before doing any operation of adjustment, maintenance or repair the TV set described. Only skilled personnel of Sanyo Technical Service should do the adjustment, maintenance or repair of TV set. 2. WARNING For the correct and safe use of the TV set, it is essential that the service personnel follow the process of safety generally accepted and the safety precautions specified in this manual.

  • Page 3: Technical Charateristics

    Service Manual SM CE14A2-C 5. TECHNICAL CHARATERISTICS. Cathode-ray tubes In-Line, Hi-bipotential gun. 14” (34 cm) Voltage synthesis, 100 programs in non-volatile memory, AFT, Fine-tuning (10 first Tuning-system programs), automatic, semiautomatic and manual channel-search. Band I, channels 2-4 (VHF)=E2-E4 Cable channels S1-S20...

  • Page 4: Connected Documents

    This Service Manual provides the particular information of the models CE14AT2-C, CE14AT2-E and CE14AX2-F and it is complemented with: 1. Service Manual of the CHASIS 2112 (EC7-A). 2. Service Electrical scheme of the model CE14A2-C. 3. Instruction manual. 9. MOUNTED CIRCUITS CODES.

  • Page 5: Cabinet Parts List

    Service Manual SM CE14A2-C 11. CABINET PARTS LIST 11.1. CABINET PARTS LIST OF CHASSIS CE14A2-C Y CE14A2-E Ref. No. Part No. Description 0080112907 Comp. side IF shield EC7-A Assy PD (Deflection) IC701 0360516207 LA7840L Q650 0360308902 2SD2599 YR701 0200225407 Heatsink Deflection EC7-A...

  • Page 6: Cabinet Parts List Of Chassis Ce14As2-F

    Service Manual SM CE14A2-C 11.2. CABINET PARTS LIST OF CHASSIS CE14AS2-F. Ref. No. Part No. Description 0080112907 Comp. side IF shield EC7-A 0080113004 Cooper side IF shield EC7-A Assy PD (Deflection) IC701 0360516207 LA7840L Q650 0360308902 2SD2599 YR701 0200225407 Heatsink deflection EC7-A...

  • Page 7: Cabinet Parts List

    Service Manual SM CE14A2-C 11.3. CABINET PARTS LIST Ref. No. Part. No. Description YP 4 0020130605 Badge SANYO Columnas Silver YP 5 0340207711 Trans. Del. Board 14” YP12 0010106607 Key Spring YP13 0130214109 Button Power 17" E7E5 YP14 0130214604 PUSHKey Assy 14" E8R8...

  • Page 8: Parts List

    Service Manual SM CE14A2-C Ref. No. Part No. Description Ref. No. Part No. Description MAIN PCB 12. PARTS LIST CF200 A2-C 0090411109 Ceramic Filter 5,5 MH. PCB SOCKET TRC CF200 A2-E 0090412701 Ceramic Trap Filter 5,5/6,5 MHZ CF200 AS2-F 0090412701 Ceramic Trap Filter 5,5/6,5 MHZ CON.FG...
  • Page 9 Service Manual SM CE14A2-C Ref. No. Part No. Description Ref. No. Part No. Description C423 0240136010 Ceramic 1000 pF. 10% 100V. C1407 AS2-F 0230360406 Ceramic SMD 1000 pF.10% 50V. C424 0230600504 Ceramic SMD 100 nF. 10% 25V. 0805 C1408 AS2-F 0230740003 Ceramic SMD 2,2 µF.
  • Page 10 Service Manual SM CE14A2-C Ref. No. Part No. Description Ref. No. Part No. Description Ferrite SMD 0603 600 Ω/20 MHz IC125 0360711501 M24C04-MN6T L900 0620011502 IC300 0360512305 TDA 7233 S L901 0090315029 Peaking Coil 10 µH. 10% IC400 A2-C 0360514509...
  • Page 11 Service Manual SM CE14A2-C Ref. No. Part No. Description Ref. No. Part No. Description R124 0790243000 R.M.G. SMD 2,2 KΩ T<=5% 0805 R402 0790151500 Carbon 10 KΩ 5% 1/6W. R.M.G. SMD 100 Ω T<=5% 0805 R126 AS2-F 0790239008 R.M.G. SMD 1 KOHM T<=5%...
  • Page 12 Note: All the information of this manual is correct in the beginning of R1202 AS2-F 0790245005 R.M.G. SMD 3,3 KOHM T<=5% the series; SANYO reserves the right to modify components and R1203 AS2-F 0790251003 R.M.G. SMD 10 KOHM T<=5% procedures to maintain its policy of continuous improvement.
  • Page 13 P.C.B. CARA COMPONENTES P.C.B. CARA SOLDADURAS P.C.B. COMPONENTS SIDE P.C.B. SOLDER SIDE P.C.B. LATO COMPONENTI P.C.B. LATO SOLDATURE...
  • Page 14 3.- Tutte le informacioni di questo schema sono corrette RESISTOR Q200 Q402 Q855 Q902 Q1401 the series; SANYO reserves the right to modify this in Q201 Q570 Q857 Q903 Q1404 CE14AT2-C la serie; SANYO se reserva el derecho de modificarlo para all'inizio della serie.
  • Page 15 Service manual Chassis 2112 Series EC7-A Chassis description Colour television Note This TV receiver will not work properly in foreign countries where the television transmission system and power source differ from the design specifications. Refer to the specifications for the design specifications. 16/06/2000 Ref.
  • Page 16 Service manual CHASSIS 2112-Series EC7-A INDEX 1. SAFETY INSTRUCTIONS............................. 3 ................................. 3 ARNING ........................3 RECAUTIONS AGAINST ..................3 ECOMMENDATIONS TO PROTECT OUR ENVIRONMENT EMC (E )..................3 AFETY AND LECTROMAGNETIC OMPATIBILITY 2. TECHNICAL CHARATERISTICS......................... 4 3.
  • Page 17 Service manual CHASSIS 2112-Series EC7-A 4.3.5.1 Heater supply........................... 12 4.3.6 EHT discharge............................12 4.3.7 Protections.............................. 12 4.3.7.1 Low Flyback protection........................12 4.3.7.2 Heater short-circuit protection......................12 4.3.7.3 Beam current overconsumption protection..................13 4.3.7.4 C656 open-circuit protection......................13 .
  • Page 18 TV using the ON/OFF button located at the front of TV set. USED BATTERIES: The batteries in the remote control of your TV set do not contain mercury. However, SANYO recommends that you do not dispose of used batteries in domestic refuse. Please, contact your dealer or your local authorities for information regarding the disposal of used batteries or your nearest collection point.
  • Page 19 Service manual CHASSIS 2112-Series EC7-A 2. TECHNICAL CHARATERISTICS. Cathode-ray tubes In-Line, Hi-bipotential gun. 14” (34 cm) Voltage synthesis, 100 programs in non-volatile memory, AFT, Fine-tuning Tuning-system (10 first programs), automatic, semiautomatic and manual channel-search. Band I, channels 2-4 (VHF)=E2-E4 Cable channels S1-S20 Hyperband channels S21-S41 Band III, channels 5-12 (VHF)=E5-E12 Band IV-V, channels 21-69 (UHF)=E21-E69...
  • Page 20 Service manual CHASSIS 2112-Series EC7-A 3. BLOCK DIAGRAM...
  • Page 21 Service manual CHASSIS 2112-Series EC7-A Integrated circuits. IC-100 (ST92195B1B1 in models with TXT): 8 bits microprocessor, with ROM memory incorporated, in that is located the program of TV control. It also incorporates the TXT management section. IC-100 (ST92185B1B1 in models without TXT): 8 bits microprocessor, with ROM memory incorporated, in that is located the program of TV control.
  • Page 22 Service manual CHASSIS 2112-Series EC7-A important mark off that the good functioning of current control depends on the state of R811 and R812, which can be altered in case of failure of Q800. Therefore, whenever the transistor is replaced by failure, new resistances must change R811and R812. The regulation in voltage is made by means of the comparison of the signal in pin 14 ("...
  • Page 23 Service manual CHASSIS 2112-Series EC7-A 4.1.4.5 Power supply signals and micro signals interrelation. The following diagram describes the power supply and micro signals. D850 Q851 +33V (TV tuning) R257 B1_L +11V (Radio tuning) R1153 Q859, Q860 +8V (Signal processing Vcc) Q853 T800 CHOPPER...
  • Page 24 Service manual CHASSIS 2112-Series EC7-A Functionality. Input Activ Related or Output number number signal. Level (ST92195) (ST92185) TXT micro Not TXT BG system selection DK system selection Elimination of AGC feature during -AGC_LS automatic tuning LB band selection MB band selection Alarm BEEP HB band selection...
  • Page 25 Service manual CHASSIS 2112-Series EC7-A The microprocessor pins related to the teletext feature are: • Video input (CVBS1 signal): pin 34. • Teletext PLL adjust voltage: pin 29. 4.2.6.1 Non-interlaced. When the TV shows the normal TXT situation (black background), the visualisation mode is not interlaced. When the TV shows the mix/newflash situation (picture on the background), the visualisation mode is interlaced.
  • Page 26 Service manual CHASSIS 2112-Series EC7-A The VTUNE signal is the tuning voltage. Amplifying the 14 bits PWM signal generated by the microprocessor and low pass filtering generates the tuning voltage. The –AGC_LS signal is active at low level. It only acts during the autotuning process. The main purpose is avoiding the AGC actuation in order to discard the weak signals.
  • Page 27 Service manual CHASSIS 2112-Series EC7-A The used high voltage transformer (T650) is Slot technology and it does not incorporate bleeder (internal resistance to unload the MAT). 4.3.3 Width adjustment. In this chassis the width adjustment only exists as forecast in the printed circuit and in the control software; but it is not mounted but it is optional (maybe it does not appear on the scheme).
  • Page 28 Service manual CHASSIS 2112-Series EC7-A 4.3.7.3 Beam current overconsumption protection. The overconsumption of beam current (when there is a short-circuit to ground, for example) provokes that the BCI signal decrease underneath 0V permanently, entering in conduction D504 and D505. This provokes that –...
  • Page 29 Service manual CHASSIS 2112-Series EC7-A phase is moved towards the left and injecting current it is moved toward the right. So, the distortions, due to phase deviations, are corrected 4.5.3 ABL description. The ABL is the limiting circuit of average beam current. The goal of this circuit is avoiding that the average beam current surpasses the 870 µA.
  • Page 30 Service manual CHASSIS 2112-Series EC7-A The AGC controls the gain of IF amplifier so that the video amplitude maintains constant. The modulated video is taken to an AGC detector, which controls directly the gain of IF stages. The AGC time constant is determined by the capacitor connected to pin 53 (DECAGC).
  • Page 31 Service manual CHASSIS 2112-Series EC7-A 4.7.1.5 Video filter and switches. In video filters and switches block, there are the following sections: Video signals selector. Filter calibrator. Chroma band-pass filter and automatic colour control. Chroma trap. The video signals selector selects the video inputs (pin 13, CVBS_INT; pin 17, CVBS_EXT; pin 11, CVBS/Y and pin 10, CHROMA).
  • Page 32 Service manual CHASSIS 2112-Series EC7-A During the sweeping, the resting voltage is 3.4V. The ABL circuitry (formed by Q673 and their periphery) reduces this voltage if it is necessary. The contrast reduction begins when the voltage of pin 22 (BCLIN) is lower than 3V. The brightness reduction begins when the voltage of pin 22 (BCLIN) is lower than 2V.
  • Page 33 Service manual CHASSIS 2112-Series EC7-A The IF of AM sound is basically formed by IC1400, integrated circuit TDA9830T, and by the surface acoustic wave SF1400. Its input is the output of tuner intermediate frequency. Its output is the AM demodulated monaural audio signal.
  • Page 34 Service manual CHASSIS 2112-Series EC7-A Depends RADIO RADIO Tuner tuner signal system. RADIO RADIO RADIO 4.8.5 Speaker amplifier. The speakers amplifier is based on the integrated circuit TDA7233S (IC300). It is the amplifier of one channel, supplied by B2 and with a gain fixed by resistor divider R319/R316. The power supplied is approximately 1Wrms at distortion.
  • Page 35 Service manual CHASSIS 2112-Series EC7-A SERVICE MENU GEOMET WHITE MORE CONFIG STAND V-STAT V.SLOPE SEMI MUTE PAL BG V.SHIFT PLL L' INI NVM TXTSET PAL DK V.AMPL PAL I H.SHIFT K-DRV SECAM BG H.AMPL TUN-UK SECAM DK S-CORR FRANCE CENTR TXT RADIO NTSC443 NTSC M...
  • Page 36 OFF in continental models ON in export models HV discharge mode ON/OFF OFF TV set trademark ON/OFF OFF OFF in models SANYO ON in models OEM TUN-UK Tuner selection for UK (only band ON/OFF OFF for no UK models. UHF) ON for UK models.
  • Page 37 Service manual CHASSIS 2112-Series EC7-A Adjustments. ADJUSTME SIGNAL CONDITIONS TEST POINT ADJUSTMENT POINT ADJUSTMENT PROCEDURE INSTRUMEN Power supply Philips Picture: Normalised VR800 Adjust to obtain: Voltmeter DC ± pattern Sound: Minimum volume Cathode D850 Resolution 106,5V 0.5V CRTs Philips >0,1V A34EAC01X06 A.G.C.
  • Page 38 Service manual CHASSIS 2112-Series EC7-A 6. SPECIAL MODES AND PROCEDURES. Secam B/G – L adaptation. In order to form a PAL B/G TV set without radio, so that also it can receive transmissions SECAM B/G and L, the following modification is due to make: GENERAL PCB Location COMPONENTS THAT ARE ANNULLED...
  • Page 39 Service manual CHASSIS 2112-Series EC7-A Location COMPONENTS THAT ARE ANNULLED COMPONENTS THAT ARE ADDED Part No. DESCRIPTION Part No. DESCRIPTION 0790701106 R.M.G. SMD 0 Ω 1/10W. R262 0790251003 R.M.G. SMD 10 KΩ 5% 1/10W. 0805 R928 0790251003 R.M.G. SMD 10KΩ 5% 1/10W 0790749402 R.M.G. SMD 6,8 KΩ 5% 1/10W. 0805 R929 0790251003 R.M.G.
  • Page 40 Service manual CHASSIS 2112-Series EC7-A 6.3.2 TV sets with TXT: OTP replacement with a mask. The micro OTP has 56 pins, like the one of the mask. In case of damaging a micro OTP (version with TXT) it should be replaced by another type mask. For that, it is necessary to make the following changes: GENERAL PCB Loc.
  • Page 41 Service manual CHASSIS 2112-Series EC7-A First digit: ‘0’: normal mode ‘1’: HOTEL mode ‘2’: RENTAL mode Second digit: ‘0’: It switches on into the same channel as it was switched off (normal mode). ‘1’ to ‘8’: It switches on into the selected programme (1 to 8). ‘9’: It switches on into AV1 The ‘RENTAL’...
  • Page 42 Service manual CHASSIS 2112-Series EC7-A Possible causes of entering in protection mode Next, some of main problems that can cause that the chassis goes to ERROR_N are: ERROR_1: Fault in the supply of +8V from the microprocessor. Non-continuity of I2C bus between IC100 and IC400. IC400 damaged.
  • Page 43 Service manual CHASSIS 2112-Series EC7-A Failure location flow-charts. 7.7.1 Errors 1, 2 and 6. ERROR_1 ERROR_6 Switch on the TV set wit M key pressed (inhibited protections) Check +5VM at pin 8 of IC125 Check the +8V at pins 12 and 37 of IC400 Check the continuity of I2C bus to the pins 5 and 6 of IC125 Check the continuity of I2C but...
  • Page 44 Service manual CHASSIS 2112-Series EC7-A 7.7.2 Error 3. ERROR_3 Picture appears with Does it just happen after flyback lines switching on? *Check +B3 at CRT socket. *A possible short-circuit in Q501, Switch on the TV set with M key Q502 or Q503 pressed (inhibited protections) *Cathode possibly short-circuit to ground * Possible faulty of T650...
  • Page 45 Service manual CHASSIS 2112-Series EC7-A 7.7.3 Error 4. ERROR_4 Set the TV in forced switch-on mode (PL103 pressed) Does the TV set has a right The +8V are delaying in Check Q850 and periphery start and it is shown the picture? raise more than normal - Check a possible short-circuit at +8V.
  • Page 46 Service manual CHASSIS 2112-Series EC7-A 7.7.5 No error indication. THE TV SET DOES NOT START AND THE LED DOES NOT SHOW ERROR INDICATIONS Check: The line stage is doing start/stop cycles The -PD signal is activated - Mains voltage and led makes a blink every 2.3 seconds? - The circuit formed by Q100 and periphery Does the led make ON/OFF cycles? The protection is performing...
  • Page 47 TRC: Cathode ray tube. VCO: Voltage controlled oscillator. Y: Luminance signal. Note: All information in this manual is correct at the start of production. SANYO reserves its right to modify components and procedures in order to comply with its continuous improvement policy.

This manual is also suitable for:

Ce14a2-eCe14as2-f

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