Download
Share
Print this page
  1. Manuals
  2. Brands
  3. akira Manuals
  4. Projection TV
  5. PTV-43H08
  6. Service manual

akira PTV-43H08 Service Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
Projection TV
Service Manual

Advertisement

loading
Need help?

Need help?

Do you have a question about the PTV-43H08 and is the answer not in the manual?

Questions and answers

Related Manuals for akira PTV-43H08

Summary of Contents for akira PTV-43H08

  • Page 1 Projection TV Service Manual...
  • Page 2 -2 - MODEL: PTV-43H08 Model No.: PTV-43H08 Version: 1.0...

  • Page 3: Table Of Contents

    -3 - CONTENTS SAFE NOTICE............................4 SPECIFICATION............................. 7 TV SET OVERVIEW..........................8 MAINTENANCE ADJUSTEMENT ....................... 9 NOTICE FOR MAINTENANCE ......................21 CIRCUIT DIAGRAM ..........................35 Model No.: PTV-43H08 Version: 1.0...

  • Page 4: Safe Notice

    Always operate the TV set with all the safeguard devices and parts reinstalled properly after the reassembly of the TV set core and other assemblies. iii. Any maintenance negligent of the safety precautions or without safety check and test may cause dangers. Model No.: PTV-43H08 Version: 1.0...
  • Page 5 While troubleshooting or testing the TV set, avoid getting close to the projection tube and the high voltage parts. Never run the TV set core for a very long time when troubleshooting the causes of over high voltage. Model No.: PTV-43H08 Version: 1.0...
  • Page 6 The components marked with “ ! ” have special safety functions. Always Replace these parts with those recommended in the replacement part list to avoid such dangers as electric shocks and fires. Fig.1 Fig.2 Model No.: PTV-43H08 Version: 1.0...

  • Page 7: Specification

    Protector Protector Specification Circuit protected Chassis with the protector F908 RT1-20-4A AC mains circuit Secondary mains board FP01 RT1-20-3. 15A Primary mains circuit Mains deflexion board F902 RT1-20-3. 15A Secondary mains circuit Secondary mains board Model No.: PTV-43H08 Version: 1.0...

  • Page 8: Tv Set Overview

    -8 - TV SET OVERVIEW Model No.: PTV-43H08 Version: 1.0...

  • Page 9: Maintenance Adjustement

    How to move the cursor during the convergence adjustment: Press digital Keys 2 , 4 , 5 , 6 and 8 , and the cursor moves as follows: Digital Key 2-------- cursor up Digital Key 8--------cursor down Digital Key 4--------cursor left Digital Key 6--------cursor right Digital Key 5--------cursor back to the original center Model No.: PTV-43H08 Version: 1.0...
  • Page 10 1.Central Magnetic Sheet of Red Tube 2. Central Magnetic Sheet of Green Tube 3.Central Magnetic Sheet of Blue Tube 4. Four Magnetic Sheets for Beam Shape Adjustment 6. Focusing Case Assembly Magnetic Sheet for Beam Alignment Adjustment Model No.: PTV-43H08 Version: 1.0...
  • Page 11 Let the TV set receive the pane signal of PAL system. Set the contrast to maximum with others medium. Turn on the TV set with Key SK01 pressed to enter the status of under convergence and display the convergence mesh. Model No.: PTV-43H08 Version: 1.0...
  • Page 12 Move the center of the red square or the blue one to make the center of the red raster or the blue one as shown in the following figure. Blue Geometry center of the screen Green Model No.: PTV-43H08 Version: 1.0...
  • Page 13 Turn the focusing potentiometer counterclockwise to check if the center of the picture moves. Repeat Steps 3 6 until the picture center does not move in step (6). Adjust the electric beam alignment of the red tube and the blue tube with the same method as above. Model No.: PTV-43H08 Version: 1.0...
  • Page 14 Red: L1 is the deviation distance of the screen center to the left, L1 2mm. Blue: L2 is the deviation distance of the screen center to the right, L2 2mm. Green: Coincident with the geometric center of the screen. Model No.: PTV-43H08 Version: 1.0...
  • Page 15 (43” )/ L2=990 5mm(50” ). 　 Adjustment of Geometric Linearity for Scanning Modes 100I and 1250I Receive PAL 100I and YPRPB 1250I signals. Adjust the geometric linearity of 100I and1250I with the same method as that of the 60P. Model No.: PTV-43H08 Version: 1.0...
  • Page 16 If the red distortions of the straight lines at both sides are different, observe and adjust the side with larger distortion. Model No.: PTV-43H08 Version: 1.0...
  • Page 17 While adjusting the position of the color distortion from purple to green, observe and adjust the focusing of the straight bright line according to the following figure. The inner and the exterior distortion of purple or green tally with the specifications in the following table: (reference value:1~ 3mm) Model No.: PTV-43H08 Version: 1.0...
  • Page 18 Key CONV on the side panel together with Key TV/AV on the remote controller to enter the status of digital convergence.) 3. 208 adjustment dots 16×13 in total. Change the dot (cursor) position with Keys 2, 4, 5, 6 and 8 on the remote controller. Model No.: PTV-43H08 Version: 1.0...
  • Page 19 Data Resetting in Nine-dot Convergence Adjustment for Users: Method one: In the status of Nine-dot Convergence Adjustment for Users, press Key Reset on the remote controller. Method two: Power up the TV set with Key CONV on the side panel being pressed. Model No.: PTV-43H08 Version: 1.0...
  • Page 20 6. Drop 0.1gram of silica gel 708 onto RH17. Try not to change the value of the potentiometer. 7. Power up and switch on the TV set and check if there is any abnormity. Model No.: PTV-43H08 Version: 1.0...

  • Page 21: Notice For Maintenance

    VM. This power supply will work only when the complete TV set is switched on. When receiving the switching on signal from the microprocessor, Relay S901 is closed, and the AC power passes through the zener diode DP01 to the circuits of deflexion, high voltage generating, convergence, video output and VM. Model No.: PTV-43H08 Version: 1.0...
  • Page 22 STANDBY+5V into +3.3V and +2.5V to supply power to CPU. Meanwhile there are two voltage stabilizers on the convergence plate, which are the one for stabilizing SW+8V to +5V and the one for stabilizing SW-7V to -5V. Model No.: PTV-43H08 Version: 1.0...
  • Page 23 -23 - Power Supply Diagram Model No.: PTV-43H08 Version: 1.0...
  • Page 24 -24 - Diagram of the Protection Circuit Model No.: PTV-43H08 Version: 1.0...
  • Page 25 LED Level output, low level upon switching on. 23/P3.3 REMOTE_IN Input REMOTE input of remote controlling pulse 24/P3.3 INTER/PRO IN/OUT INTER-PRO level output, temporarily for field frequency switching. Output low level at 100/120HZ; high level at 50/60HZ. Model No.: PTV-43H08 Version: 1.0...
  • Page 26 Press a key to enter the factory menu of the TV CPU (to adjust the line/field amplitude and the geometric distortion). Low level available. Model No.: PTV-43H08 Version: 1.0...
  • Page 27 BUSY convergence module detecting the level input. When the convergence module outputting a high level, the convergence mesh is displayed on the screen to enter the convergence adjustment status, with the main CPU ignoring the input from the remote controller. 52/P1.7 IN/OUT Model No.: PTV-43H08 Version: 1.0...
  • Page 28 -28 - Flowchart of Maintenance Troubles Model No.: PTV-43H08 Version: 1.0...
  • Page 29 -29 - Model No.: PTV-43H08 Version: 1.0...
  • Page 30 -30 - Model No.: PTV-43H08 Version: 1.0...
  • Page 31 -31 - Model No.: PTV-43H08 Version: 1.0...
  • Page 32 OSD vertical line brightness OSD RETR H 00H-3CH OSD horizontal return blanking OSD RETR V 00H-3CH OSD vertical return blanking DAC RETR H 00H-FFH DAC horizontal return blanking DAC RETR V 00H-FFH DAC vertical return blanking Model No.: PTV-43H08 Version: 1.0...
  • Page 33 OSD vertical line brightness OSD RETR H 00H-3CH OSD horizontal return blanking OSD RETR V 00H-3CH OSD vertical return blanking DAC RETR H 00H-FFH DAC horizontal return blanking DAC RETR V 00H-FFH DAC vertical return blanking Model No.: PTV-43H08 Version: 1.0...
  • Page 34 OSD vertical line brightness OSD RETR H 00H-3CH OSD horizontal return blanking OSD RETR V 00H-3CH OSD vertical return blanking DAC RETR H 00H-FFH DAC horizontal return blanking DAC RETR V 00H-FFH DAC vertical return blanking Model No.: PTV-43H08 Version: 1.0...

  • Page 35: Circuit Diagram

    -35 - CIRCUIT DIAGRAM Model No.: PTV-43H08 Version: 1.0...
  • Page 36 -36 - Model No.: PTV-43H08 Version: 1.0...
  • Page 37 -37 - Model No.: PTV-43H08 Version: 1.0...
  • Page 38 -38 - Model No.: PTV-43H08 Version: 1.0...
  • Page 39 -39 - Model No.: PTV-43H08 Version: 1.0...
  • Page 40 -40 - Model No.: PTV-43H08 Version: 1.0...
  • Page 41 -41 - Model No.: PTV-43H08 Version: 1.0...
  • Page 42 -42 - Model No.: PTV-43H08 Version: 1.0...
  • Page 43 -43 - Model No.: PTV-43H08 Version: 1.0...
  • Page 44 -44 - Model No.: PTV-43H08 Version: 1.0...
  • Page 45 -45 - Model No.: PTV-43H08 Version: 1.0...
  • Page 46 -46 - Model No.: PTV-43H08 Version: 1.0...
  • Page 47 -47 - Model No.: PTV-43H08 Version: 1.0...
  • Page 48 -48 - Model No.: PTV-43H08 Version: 1.0...
  • Page 49 -49 - Model No.: PTV-43H08 Version: 1.0...
  • Page 50 -50 - Model No.: PTV-43H08 Version: 1.0...
  • Page 51 -51 - Model No.: PTV-43H08 Version: 1.0...
  • Page 52 -52 - Model No.: PTV-43H08 Version: 1.0...
  • Page 53 -53 - Model No.: PTV-43H08 Version: 1.0...
  • Page 54 -54 - Model No.: PTV-43H08 Version: 1.0...
  • Page 55 -55 - Model No.: PTV-43H08 Version: 1.0...
  • Page 56 -56 - Model No.: PTV-43H08 Version: 1.0...
  • Page 57 -57 - Model No.: PTV-43H08 Version: 1.0...
  • Page 58 -58 - Model No.: PTV-43H08 Version: 1.0...
  • Page 59 -59 - Model No.: PTV-43H08 Version: 1.0...
  • Page 60 -60 - Model No.: PTV-43H08 Version: 1.0...
  • Page 61 -61 - Model No.: PTV-43H08 Version: 1.0...
  • Page 62 -62 - Model No.: PTV-43H08 Version: 1.0...
  • Page 63 -63 - Model No.: PTV-43H08 Version: 1.0...
  • Page 64 -64 - Model No.: PTV-43H08 Version: 1.0...
  • Page 65 -65 - Model No.: PTV-43H08 Version: 1.0...
  • Page 66 -66 - Model No.: PTV-43H08 Version: 1.0...
  • Page 67 -67 - Model No.: PTV-43H08 Version: 1.0...