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Aiwa TV-F2000, Service Manual

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Aiwa TV-F2000 Service Manual Download Page 13

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3. Display of “CRT ON” accumulated hours

The CRT usage time is accumulated on an hourly basis and is displayed in
hexadecimal figures.

Sample calculation of displayed hexadecimal figures: AFT OK 1234 H ST+S

• The display will be reset to 0000H when the accumulated hours exceed

7FFFH(32768 hours).

Contents of Aging Mode :

1. Release “Auto Power Off” function

Release “Auto Power Off” function when no input is supplied.
Use this mode for warming up (aging) during CRT adjustment.

2. AFT S-curve status indication

 The condition of FT S-curves are indicated by “OK” for suitable tuning, “UP” for too high or “DN” for too low.

AFT S-curve

UP

 . . . Deviation from standard value high.

OK

 . . . Normal value.

DN

 . . . (DOWN) Deviation from standard value low.

Summary of Contents for TV-F2000

Page 1: ... U P P L E M E N T This Service Manual contains the additional information DISASSEMBLY INSTRUCTIONS and ADJUSTMENT for the model TV F2000 U TV F2100 HT NH If requiring the other information see Service Manual of TV F2000 U S M Code No 09 006 432 1R1 and TV F2100 HT NH S M Code No 09 008 432 1R2 ...

Page 2: ...gaussing coil connector and connect it as service jig Cement resistor R848 which is parallel to the degaussing coil is opened when the power is turned on without the degaussing coil or dummy resistor This model s cement resistor R848 is as shown below Horizontal noise will appear on the screen if this cement resistor has been opened If there is no instruction for setting of the input signal get si...

Page 3: ...ould 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 screwdriver to the CRT GND via an alligator clip 2 Use a tester to check the end of the screwdriver and ground of the TV...

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 High voltage cable Anode cap Figure 3 4 Figure 3 5 ...

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: ... arrow 1 See Figure 4 1 5 MAIN C B REMOVAL 1 Remove connector CN404 from Audio C B 2 Remove connector CN807 3 Remove connector CN882 from PS C B 4 Pull out the MAIN C B in the direction of the arrow 2 See Figure 4 1 CN882 Power Cord Front cabinet AUDIO C B CN404 Speakers CN951 NK C B CN901 CN903 CN807 Degauss cord CN902 CN952 MAIN C B ...

Page 8: ...f about 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 Cy...

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: ...yoke and tighten the DY lock screw 8 Shift the magnet assembly to the front toward the CRTfunnel 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 ...

Page 11: ...oke 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 Wedge Wedge Wedge 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 opening of the two magnets it is possible to adjust the amou...

Page 12: ...h Fig 2a Confirm the following items before doing the electrical adjustment In case the contents are different press 1 key and select US21 for the destination In case the data is different use the CHANNEL key to scroll through 0 F and set to the correct data value of 0 or 1 by the volume key All the settings are stored when the TEST key is pressed to complete the correction TV F2100 1 Enter to the...

Page 13: ...umulated hours exceed 7FFFH 32768 hours Contents of Aging Mode 1 Release Auto Power Off function Release Auto Power Off function when no input is supplied Use this mode for warming up aging during CRT adjustment 2 AFT S curve status indication The condition of FT S curves are indicated by OK for suitable tuning UP for too high or DN for too low AFT S curve UP Deviation from standard value high OK ...

Page 14: ...EY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY PUSH CH UP DN KEY H POS 0 31 V POS 0 7 V SIZE 0 63 OSD POS 0 48 SD OK PIF VCO 58 AFT OK RF AGC 32 SD OK PAGE 1 R CUTOFF 0 255 G CUTOFF 0 255 B CUTOFF 0 255 G DRIVE 0 255 PAGE 2 B DRIVE 0 255 ATT 10 PAGE 5 SUB CONTR 63 63 PAGE 3 SUB BRIGHT 63 63 SUB TINT 63 63 SUB COLOR 63 63 358 TRAP D ON PAGE 4 1 OFF BPF CUTOFF 2 AUTO 0 OFF WPL 1 ON 0 2 H A...

Page 15: ...ion 1 Use SFR602 to adjust the vertical distortion Fig A 2 Use SFR603 to adjust the horizontal distortion Fig B Repeat 1 2 until the vertical lines become straight Electrical adjustment Operate after inputting the following initial figures when replacing EEP ROM Check the condition and adjust the area where the general repair is carried out Initial Value PAGE 1 1 H POS 16 2 V POS 3 3 V SIZE 30 4 O...

Page 16: ...reen Fig 1 2 V LINEARITY Vertical Linearity Adjustment Input Signal Monoscope LION MARK Measuring Instrument Monoscope NTSC Adjust the 6 circular figures on monoscope to be true circles by SFR501 Simple Adjustment Input Signal Crosshatch Adjustment Location SFR501 Measuring Instrucment Pattern generator NTSC Adjust the SFR501 to make crosshatch patterns square Adjust V POS PAGE 1 2 and Linearity r...

Page 17: ...ltiple numbers of ranges select the intermediate value SD will display NG while the screen has no signals There will be no problem with VCO Adjustment e g when there is no signal with Video input In this case it is possible to make adjustments as long as ANT is loaded 1 6 RF AGC RF AGC Adjustment Menu Screen PAGE 1 6 Input Signal ANT RF INPUT Color Bar Test Point TP101 RF AGC Measuring Instrument ...

Page 18: ... numeric figure to the point where the bluish color disappears completely 2 7 Repeat the process of 1 6 for several times and adjust for whiter look Focus Adjustment Input Signal Dot pattern Adjustment Point SFR located at upper part of FBT T601 Measuring Instrument Pattern generator reader LCG 401 Adjust SFR which is located at upper part of FBT T601 in order to get the best focus for the dot Scr...

Page 19: ...nt Menu Screen PAGE 3 4 Input Signal Color Bar VIDEO IN Measuring Instrument Oscilloscope Pattern generator reader LCG 401 Test Point CNA704 3 PIN B 1 Connect the oscilloscope to CNA704 3 PIN B 2 Using the volume keys on the jig remote controller adjust the top excursions of waveform to be linear Fig 3 4 PAGE 4 4 TV SETTING CHECK Confirmation of Model Setting Adjustment Menu Screen PAGE 4 1 4 Each...

Page 20: ...RF Output 2CH Measuring Instrument Oscilloscope TV Multiplex Transmission Signaler reader 236A Test Point IC701 1 PIN TV OUT R 1 Connect the oscilloscope to IC701 1 PIN 2 Start receiving signals from TV 2CH 3 PAGE 5 3 Using the volume keys on the jig remote controller adjust the voltage width of IC701 1 PIN waveform to the minimum as in Fig 5 3 4 PAGE 5 2 Adjust the internal Variation of TV Multip...

Page 21: ...IN IF OUT PUT IC301 44PIN AFT Measuring Location L205 P IF Measuring Instrument Oscilloscope Pattern generator reader LCG401 1 Connect the oscilloscope to IC301 44PIN 2 Enter the specific level of RF signal to TU101 11PIN and adjust L205 so that the voltage of IC301 44PIN will be 2 8 0 2VDC 6 2 SIF ADJUSTMENT Audio IF Variation Adjustment Input Signal AM FM SG RF OUT 4 5MHz SIF MOD OFF 90dB µV The...

Page 22: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 9820543 ...

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