Download
Share
Print this page
  1. Manuals
  2. Brands
  3. akira Manuals
  4. TV
  5. 21FES1 Series
  6. Service manual

akira 21FES1 Series Service Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
C
o
l
C o
o l
l o
C
S
e
r
v
i
c
S e
e r
r v
v i
i c
c e
S
o
u
r
T
V
o u
u r
r T
T V
e
M
a
n
e M
M a
a n
n u
V
u
a
l
u a
a l
l

Advertisement

loading
Need help?

Need help?

Do you have a question about the 21FES1 Series and is the answer not in the manual?

Questions and answers

Related Manuals for akira 21FES1 Series

Summary of Contents for akira 21FES1 Series

  • Page 2 CHASSIS: 8821 MODEL: 21FES1/BE(M) Model No: 21FES1BE(M) Version 2.0...

  • Page 3: Table Of Contents

    CONTENT GENERAL DESCRIPTION........................4 CONNECTOR VIEW ..........................5 SAFETY INSTRUCTIONS ........................5 CIRCUIT ADJUSTMENTS........................6 FAULT FINDING TREES, DIAGRAMS AND OVERVIEWS............12 VARIOUS PARAMETERS OF INTEGRATED CIRCUIT ..............25 THE BUS DATA FOR TMPA8803....................... 25 ELECTRICAL PARTS LIST......................... 28 CIRCUIT DIAGRAM ..........................37 Model No: 21FES1BE(M) Version 2.0...

  • Page 4: General Description

    GENERAL DESCRIPTION AKTP01 /02 chassis series are applied A14T02/A14T02a respectively which uses mainly TOSHIBA’ advanced UOC-ultimate chip TMPA8803/8821 and I C-bus controlled IC With combination of micro controller and small signal processor, the TMPA8803/8821 series feature high-integration, high- performance-to-price ratio and high-reliability and advanced functions with fewer external components, which provide much convenience for manufacturing and technical service.
  • Page 5 Y IN C700 Cr IN AUDIO AMPLIFIER SP701 Cb IN (N701) LA4267 16Ω VIDEO IN2 VIDEO or AUDIO AUDIO IN AUDIO IN2 SP702 AV1/AV2 SWITH 16Ω VIDEO IN1 VIDEO IN (N203)CD4053 AUDIO IN1 SIF TRAPS VIDEO OUT Z302,Z304 SWICH V202 AUDIO OUT V201 VIDEO...

  • Page 6: Safety Instructions

    When replacing a burnout fuse, use the one with the same specifications as the original. When replacing old wire, wind new one round the shaft to weld. When replacing components with safety in performance, use the same type as that specified by AKIRA and install it in the former way.

  • Page 7: Circuit Adjustments

    CIRCUIT ADJUSTMENTS GENERAL INFORMATIONS All adjustment are thoroughly checked and corrected when the receiver leaves the factory. Therefore the receiver should operate normally and produce proper color and B/W pictures upon installation. However, several minor adjustments may be required depending on the particular location in which the receiver is operated.
  • Page 8 ADJUSTMENT PROCEDURE Turn RP551 potentiometer to adjust B+ to specified voltage. Check voltages for video out, vertical out, circuit work and audio power out as follow:- Voltage (volt) Tolerance 14 inch 21 inch ±2V Video Out ±5V Vertical Out ±1V Circuit Work ±1V Audio Power Out...
  • Page 9 Inspection procedure Input the TV signal which system is designated in technical specification 2. Switch TV system to the set by pressing SYS key on user remote controller according to the TV system in SG. The picture and sound must be normal. Press TV/AV key, to select AV input.
  • Page 10 White balance adjustment Item AKTP01/02 chassis Measuring SG and white balance meter Equipment No.1 service remote controller Preparation Warm up the set for more than 30 min. before Adj. Brightness, contrast and color should be set in standard Adjustment procedure Receive the monoscope pattern signal.
  • Page 11 Adjustment procedure Receive the 5-circles pattern signal that is 50HZ vertical frequency Press V-LINE, V-SIZE, V-CENT and H-CENT key on NO.2 service remote controller respectively to select the vertical linearity, height, center (position) and horizontal center (position) adjustment, and then press + or - key to adjust the value of them respectively according to factory’s specification.

  • Page 12: Fault Finding Trees, Diagrams And Overviews

    FAULT FINDING TREE, DIAGRAMS AND OVERVIEW Three-None (no raster, no picture, no sound) This failure is mainly caused by big-power circuit such as power supply, horizontal scanning, vertical scanning. The detail checking and repairing steps are as follow. Model No: 21FES1BE(M) Version 2.0...
  • Page 13 130V Test the voltage of C561 115V 300V 115V Check Cut off R449 N204 pin17 voltage Voltage of C507 R552,V551,VD551 VD515,V511, variation Norma Test other voltage such as V512,R555 Check if V501 collect-emitter 146V, 24V, and 12V Was broken down N204 pin13 voltage Others Check R502,F501,power...
  • Page 14 B Two-None (no picture, no sound) The failure shows that the set does not display the picture but it has noise wave or blue background or OSD on the screen. This means that the circuits of power supply, horizontal scanning, vertical scanning and video amplification are normal and they are not considered in the repairing.
  • Page 15 No picture Check if A101 has input signal Check R553,N904,C926 Out of the “ 0-33V ” range Check the “ VT ” voltage when auto searching The voltage on the C926 Check RF signal input and adaptor In the “ 0-33V ” range No variation Check the “...
  • Page 16 No sound In this kind of failure, first of all we should observe if there is the picture on the CRT. It proves the small signal circuit to work correctly with the picture on the CRT and we only check the sound signal processing and sound amplification circuit. The repairing method (B1) may be referred without picture.
  • Page 17 Hear if there is the voice liking “Ka…Ka ” in the loudspeaker via using “ Signal-input way ” by touching pin 31 of N204 Hear if there is the voice liking “Ka…Ka ” in the loudspeaker via using “ Signal-input way ” by touching pin 28 of N204 Check C103,R706,C703,N204 Check R202, C202, N204 Hear if there is the voice liking “Ka…Ka ”...
  • Page 18 Only horizontal line in the middle of the screen If vertical deflection circuit does not work, this kind of failure will happen. In deflection yoke, there only has horizontal sweeping, the electron beam in the CRT only moves in the horizontal orientation, so form this failure. (While checking horizontal and vertical deflection circuit’...
  • Page 19 Abnormal The waveform on the pin 16 of N204 Normal Check C303,R328,N204 The voltage on pin 2 of N402 Abnormal Measuring the waveform on pin 1 of N402 Check VD557, R550,V552,N402 Normal The deflection yoke on the CRT Check R328, C446, N402, N204 Abnormal Measuring the waveform on pin 5 of N402 Check N402...
  • Page 20 Only vertical line in the middle of the screen This is a dangerous failure. It probable causes flashover and smoking inside the set. Don’ t let your TV work for a long time as this failure appears. Because the electron beam can not move in the horizontal orientation, the failure should be in the horizontal deflection circuit.
  • Page 21 N204 does not work The voltage on the pin 55 of N204 Check the voltage on the positive pole of C927 Observe if there is sine wave on the pin 6 or pin 7 of N204 with an oscilloscope Check alternant voltage on secondary coil of T501, Check Z901, N204 4.98V 4.98V...
  • Page 22 No OSD (On Screen Display) This failure is usually cause by the circuit of character generated and located. Most of reasons are that the horizontal and vertical flyback pulse signals do not come to UOC. We can judge this failure by measuring the wave of the character in an oscilloscope. The detail checking and repairing steps are as follow: No OSD Check the wave on the pin 4 of FBT...

  • Page 23: Various Parameters Of Integrated Circuit

    VARIOUS PARAMETERS OF INTEGRATED CIRCUIT A: Pin functions of N204 ( TMPA8803/23/21 ) Symbol Function BAND1 BAND data output 1 BAND2 BAND data output 2 Key input GND connection RESET Reset signal input 8 MHz oscillator connecting XOUT 8 MHz oscillator connecting TEST GND connection 5V power supply...
  • Page 24 Symbol Function Black Det Terminal to be connected with Black Det filter for black stretch. Chroma PLL Terminal to be connected with APC filter for chroma demodulation. IK in Input terminal to sense ACB cathode current. RGB Vcc Vcc terminal for RGB circuit. Supply 5V. R out Output terminal for R signal.

  • Page 25: The Bus Data For Tmpa8803

    THE BUS DATA FOR TMPA8803 Adjustment Adjustment Function Type Data Item RCUT Red Dard Balance GCUT Green Dark Balance BCUT Blue Dark Balance GDRV Green light Balance BDRV Blue light Balance CNTX Sub Contrast Max BRTC Sub-bright Centre COLC Sub Color Center(NTSC) TNTC Sub Tint Center COLP...
  • Page 26 Adjustment Adjustment Function Type Data Item HITS Vertical amplitude deflection of 60Hz VLIN Vertical line of 50 Hz Vertical S correction/50 Hz VLIS Vertical line deflection of 60 Hz Vertical S correction/60 Hz SECAM B-Y Black SECAM R-Y Black BRTS Sub bright (difference) RAGC RF AGC...
  • Page 27 Adjustment Adjustment Function Type Data Item CUR STEP Factory Data AUSTP When Mute off ,Vol.ATT up step number MODE0 Factory Data MODE1 Factory Data OSDF OSD width OSD position Factory Data NOTE: The data provided in the form provides to consult only! Model No: 21FES1BE(M) Version 2.0...

  • Page 28: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a ! have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don’t degrade the safety of the product through improper servicing. NOTE: parts that not assigned part numbers(…………) are not available.
  • Page 29 Ref. No Part No. Name Specification R621 D10B151J-T Carbon resistor RT13-1/6W-150Ω±5% R106 D10B221J-T Carbon resistor RT13-1/6W-220Ω±5% R107 D10B221J-T Carbon resistor RT13-1/6W-220Ω±5% R310 D10B221J-T Carbon resistor RT13-1/6W-220Ω±5% R205 D10B271J-T Carbon resistor RT13-1/6W-270Ω±5% R236 D10B271J-T Carbon resistor RT13-1/6W-270Ω±5% R237 D10B271J-T Carbon resistor RT13-1/6W-270Ω±5% R238 D10B271J-T...
  • Page 30 Ref. No Part No. Name Specification R443 D10B562J-T Carbon resistor RT13-1/6W-5.6KΩ±5% R511 D10B562J-T Carbon resistor RT13-1/6W-5.6KΩ±5% R920 D10B562J-T Carbon resistor RT13-1/6W-5.6KΩ±5% R1002 D10B562J-T Carbon resistor RT13-1/6W-5.6KΩ±5% R322 D10B822J-T Carbon resistor RT13-1/6W-8.2KΩ±5% R947 D10B822J-T Carbon resistor RT13-1/6W-8.2KΩ±5% R102 D10B103J-T Carbon resistor RT13-1/6W-10KΩ±5% R255 D10B103J-T...
  • Page 31 Ref. No Part No. Name Specification R211 D10B334J-T Carbon resistor RT13-1/6W-330KΩ±5% R247 D10B564J-T Carbon resistor RT13-1/6W-560KΩ±5% R632 D10C330J-T Carbon resistor RT14-1/4W-33Ω±5% R519 D10C221J-T Carbon resistor RT14-1/4W-220Ω±5% R960 D10C471J-T Carbon resistor RT14-1/4W-470Ω±5% R245 D10C182J-T Carbon resistor RT14-1/4W-1.8KΩ±5% R526 D10C222J-T Carbon resistor RT14-1/4W-2.2KΩ±5% R559 D10C392J-T...
  • Page 32 Ref. No Part No. Name Specification C315 C2CF220J-T Ceramic capacitor CC1-06A-CH-50/63V-22pF-J C247 C2CF330J-T Ceramic capacitor CC1-06A-CH-50/63V-33pF-J C901 C2CF330J-T Ceramic capacitor CC1-06A-CH-50/63V-33pF-J C602 C2BF101K-T Ceramic capacitor CC1-06A-RH-50/63V-100pF-J C612 C2BF101K-T Ceramic capacitor CC1-06A-RH-50/63V-100pF-J C622 C2BF101K-T Ceramic capacitor CC1-06A-RH-50/63V-100pF-J C235 C2BF181K-T Ceramic capacitor CC1-06A-RH-50/63V-180pF-J C908 C2BF221K-T...
  • Page 33 Ref. No Part No. Name Specification C291 E20C4R7M-T Electrolytic Capacitor CD110-16V-4.7uF –M C292 E20C4R7M-T Electrolytic Capacitor CD110-16V-4.7uF –M C296 E20C4R7M-T Electrolytic Capacitor CD110-16V-4.7uF -M C293 E20C100M-T Electrolytic Capacitor CD110-16V-10uF –M C294 E20C100M-T Electrolytic Capacitor CD110-16V-10uF –M C306 E20C100M-T Electrolytic Capacitor CD110-16V-10uF –M C558 E20C100M-T...
  • Page 34 Ref. No Part No. Name Specification C215 E20F1R0M-T Electrolytic Capacitor CD110-50V-1uF –M C216 E20F1R0M-T Electrolytic Capacitor CD110-50V-1uF –M C217 E20F1R0M-T Electrolytic Capacitor CD110-50V-1uF –M C236 E20F1R0M-T Electrolytic Capacitor CD110-50V-1uF –M C245 E20F1R0M-T Electrolytic Capacitor CD110-50V-1uF -M C103 E20F2R2M-T Electrolytic Capacitor CD110-50V-2.2uF –M C300 E20F2R2M-T...
  • Page 35 Ref. No Part No. Name Specification VD1001 DL0008XX RED 5mm VD230 DR0001XX-T Diode IS1555/IN4148A VD232 DR0001XX-T Diode IS1555/IN4148A VD233 DR0001XX-T Diode IS1555/IN4148A VD401 DR0001XX-T Diode IS1555/IN4148A VD514 DR0001XX-T Diode IS1555/IN4148A VD516 DR0001XX-T Diode IS1555/IN4148A VD558 DR0001XX-T Diode IS1555/IN4148A VD601 DR0001XX-T Diode IS1555/IN4148A VD901...
  • Page 36 Ref. No Part No. Name Specification V552 RXB892XX-T Audion 2SB892/2SB985T V101 RXC2216X-T Audion 2SC2216 V601 RXC2482X Audion 2SC2482 V611 RXC2482X Audion 2SC2482 V621 RXC2482X Audion 2SC2482 V444 RXC2383X-T Audion 2SC2383-O V512 RXC3807X Audion 2SC3807/2SC5070 V501 RXC5287X Audion 2SD1710/2SC4584/C5586 V102 RXC945XX-T Audion 2SC945/2SC1815/2SC536E V103...

This manual is also suitable for:

21fes1/be21fes1/bm