Aiwa TV-AS215NH, Service Manual

Page 1: ... 416 8S2 S U P P L E M E N T This Service Manual contains the additional information NOTICES BEFORE REPAIRING DISASSEMBLY INSTRUCTIONS and ADJUSTMENT for the model TV AS215 NH If requiring the other information see Service Manual of TV AS215 NH S M Code No 09 99B 416 8R1 ...

Page 2: ...note the followings board The inside wiring is designed not to get close to the pyrogenic parts and high voltage parts Therefore put these parts in the original positions 5 Take care of the cathode ray tube By setting an explosion proof cathode ray tube in this equipment safety is secured against implosion However when removing it or servicing from the back it gives out shock that is dangerous Tak...

Page 3: ...nt the hook to remove the cap the spring characteristics of the hook could be lost and when reinstalled the cap would come off from the CRT anode button easily causing an accident Do not turn the anode cap 3 If the anode cap is turned in the direction of its circumference the hook is likely to come off 2 2 Anode Cap Removal Discharge the anode voltage See Figure 2 1 1 Connect a flat bladed screwdr...

Page 4: ...de cap after installing it Never re use the hook when it has been deformed 1 If the anode cap is turned after it is installed it may come off Therefore arrange the high voltage cable before attaching the anode cap See Figure 3 1 2 If you have attached the anode cap before arranging the high voltage cable arrange the cable carefully so the cap does not turn 3 2 Anode cap reinstallation 1 Use a clea...

Page 5: ... could turn and cause an installation defect 4 Turn over the rubber cap symmetrically on the left and right See Figure 3 4 Caution Take great care not to damage the anode cap Figure 3 3 5 Fit your forefinger over the projection at the center of the cap and hold the cap between your thumb and middle finger See Figure 3 5 Figure 3 4 Figure 3 5 High voltage cable Anode cap ...

Page 6: ...cap turned over and visually check that the hook is engaged securely 9 Release your hand from the rubber cap of the anode cap Caution Cover the anode cap so that it does not lift 10 Hold the skirt of the andoe cap slightly to improve the close contact between the cap and CRT 11 Check that the anode cap is in close contact with the CRT See Figure 3 8 Figure 3 8 Figure 3 7 Figure 3 6 Anode button Sk...

Page 7: ...tion of arrow 1 See Figure 4 1 5 MAIN C B REMOVAL 1 Remove connector CN401 2 Remove connector CN801 3 Remove connector CN802 4 Pull out the MAIN C B in the direction of the arrow 2 See Figure 4 1 Figure 4 1 CN801 Power Cord Front cabinet MAIN C B CN401 Speakers CN904 NK C B CN902 CN901 CN802 Degauss cord ...

Page 8: ... 0 3 V with flat envelope Confirm that ratio of the burst signal amplitude and the red signal amplitude is 0 30 0 66 If the output signal does not conform with the specifications calibrate the pattern generator Refer to pattern generator operation manual Use the LEADER LCG 404 for the pattern generator Fig 1 1 Approx 0 3V Approx 0 3V Burst signal 1 Vp p White Approx 75 Approx 0 7V Yellow Cyan Gree...

Page 9: ...kwise looking from the CRT s back screen and disengage Be careful not to loose the lock ring too much If the magnet assembly has become shifted during adjustments secure it to the position in Fig 1 4 3 Beam convergence adjustment 6 pole magnet With a 4 pole magnet align the G beam with the already aligned R B beam G R B RGB magenta white Align the G beam with the R B beam Fig 1 3 CRT DY DY lock sc...

Page 10: ...ssembly to the front toward the CRT funnel stop movement before the adjustment position and then tighten the magnet lock screw At this time be careful not to shift the position of the purity magnet As there is occurrence of convergence distortion after completing the landing adjustments be sure to carry out convergence adjustments If the color irregularities in the screen s corner section are not ...

Page 11: ...oundings 2 Insert wedges in three locations in the gap between the deflecting yoke and the surface of the CRT funnel in order to secure the deflecting yoke Refer to Fig 1 9 Position of wedge Fig 1 9 In Fig 1 8 the two 6 pole magnets are stacked together so as to be of the same polarity Move the B and R beams to their respective direction by rotating the two 6 pole magnets together By adjusting the...

Page 12: ...s during general repairs Aging Mode Operation Method Make sure that confirmation after replacing EEP ROM 1 Press the TEST key on the jig remote controller and enter to the aging mode Refer to Fig 1 2 Press the SYSTEM key to check the status of distinction switch If the contents are different choose NH2 by pressing the 2 key for the destinations For the data move 1 16 by using channel keys and chan...

Page 13: ...EY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH 1 6 KEY PUSH 1 5 KEY PUSH 1 4 KEY PUSH 1 4 KEY PUSH 1 3 KEY H POS V POS V SIZE OSD POS PIF VCO 58 SD AFT RF AGC 32 SD PAGE 1 R CUTOFF G CUTOFF B CUTOFF G DRIVE B DRIVE PAGE 2 SUB CONTR SUB BRIGHT SUB TINT SUB COLOR PAGE 3 358 TRAP BPF CUTOFF H AFC ...

Page 14: ...2 S901 R903 TP902 BT301 C332 TP201 AFT IC301 J403 J401 IC402 IC303 L205 VCO L201 SIF TP302 TP203 FM DET TP101 RF AGC IC3 IC1 IC701 TU101 J402 FORCUS SCREEN T601 FBT SFR T601 FBT 3 TP102 IF TP702 TP701 TP202 Electrical Adjustment ...

Page 15: ...exact centering position by allocating an equal number of squares on the left and right sides of the dot Fig 1 1 1 2 V POS Vertical Positioning Adjustment Menu Screen PAGE 1 2 Input signal Crosshatch Measuring instrument Pattern generator Using the volume keys on the jig remote controller adjust the dot mark to the exact vertical centre position in the crosshatch screen Fig 1 2 1 3 V SIZE Vertical...

Page 16: ... RF AGC TU101 1 pin Measuring instrument Oscilloscope 1 Connect oscilloscope to TP 101 2 Using the volume keys on the jig remote controller adjust the test point voltage becomes to 3 5V 0 3V And at the same time confirmAFT status changes to OK as shown in the fig 1 6 2 White Balance Adjustment Adjustment Menu Screen PAGE 2 1 5 User s picture quality will be cleared when the adjustment menu screen ...

Page 17: ... keypad to get a horizontal single line screen Fig 2 2 3 Adjust SFR located at the lower part of FBT T601 until the horizontal line starts to be slightly brightened 4 Repeat the process of step 2 and return to the Adjustment Menu Screen 3 1 SUB BRIGHT Sub brightness Adjustment Adjustment Menu Screen PAGE 3 2 make sure of the order Input signal Color bar Stair step Measuring insrument Pattern gener...

Page 18: ...mote controller to search and set the matching menu screen to the model 3 58 TRAP 0 ON BPF 2 AUTO H AFC 1 1 WPL 0 OFF 5 1 ATT ALIGNMENT ATT Adjustment Adjustment Menu Screen PAGE 5 1 Input signal ANT RF Input Measuring instrument Oscilloscope Test point IC701 2 pin TV L 1 Connect oscilloscope to TP702 IC701 2 pin 2 Use the volume keys on the jig remote controller and adjust the figure for IC701 2 ...

Page 19: ...l SIF Coil 6 1 VCO ADJUSTMENT VCO PIF adjustment Video Carrier Frequency Free Running Adjustment Input signal RF color bar Generator Input level 90dBµV Level may not be exactly the same depends on the receiving condition Broadcast CH fc 45 75MHz Simple adjustment method receives normal broadcasting Mode TUNER Test point INPUT TP 102 IF TU101 11 pin or receiving condition OUTPUT TP 201 AFT IC301 44...

Page 20: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 9820543 ...