TV-F2400 TV-F2500 U NH,HT SERVICE MANUAL COLOR TELEVISION S/M Code No. 09-009-431-9S2 SU PP LE ME DA NT TA • This Service Manual contains the additional information "NOTE ON BEFORE REPAIRING", "SETTING OF IIC BUS DATA" and "ADJUSTMENT" for the model TV-F2400/2500(U,NH,HT). If requiring the other information, see Service Manual of TV-F2400(U),(S/M Code No. 09-007-431-9R1) and TV-F2500(NH,HT), (S/M Code No. 09-008-431-9R2).
NOTE ON BEFORE REPAIRING • • • Do not turn on the power without degaussing coil when repairing. In case of removing degaussing coil when repairing, connect dummy as follows; Method 1 : Use another new degaussing coil and connect it when repairing. Method 2 : Place the 6.8 - 2.0W resistor to the degaussing 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.
Setting of IIC BUS Data This model is designed with the ability to adjust most parts of the image projection and deflection system by using the jig remote controller. Preparations : • Modify the hidden keys on the RC-6VT06 jig remote controller (TV-C142/86-LB4-951-010) so that they can easily be pressed. 2 keys to be modified.
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. 3. Display of “CRT ON” accumulated hours The CRT usage time is accumulated on an hourly basis and is displayed in hexadecimal figures.
Adjustment Mode Operation Method : 1. Return to the aging display by pressing the “SYSTEM” key and press “TEST” key to display the adjustment menu screen.
ADJUSTMENT 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 2. V POS 3. V SIZE 4. OSD POS 5. PIF VCO 6. RF AGC 16 3 30 6 58 32 PAGE 2 1. R CUT OFF 2. G CUT OFF 3. B CUT OFF 4. G DRIVE 5. B DRIVE 127 127 127 127 127 PAGE 3 1. SUB 2. SUB 3. SUB 4. SUB –5 + 32 + 16 + 16 CONTRAST BRIGHT TINT COLOR PAGE 4 1. 3.58 TRAP 2. BPF 3. H AFC 4.
PAGE 1 8~9 1-1. H POS Horizontal Positioning Adjustment / Adjustment Menu Screen: PAGE 1-1 Center 8~9 PAGE 1 Input Signal : Crosshatch Measuring Instrument : Pattern generator / reader: LCG-401 • Use the volume keys on the jig remote controller to adjust the dot mark in the centre of crosshatch screen to the exact centering position by allocating an equal number of squares on the left and right side of the dot. (Fig. 1-1) H POS 20 Fig. 1-1 1-2.
1-4. OSD POS OSD Positioning Adjustment / Adjustment Menu Screen: PAGE 1-4 PAGE 1 Input Signal: Not specified. • Use the volume keys on the jig remote controller to adjust the position of the + sign on both right and left sides shown on the OSD screen to be equivalent from the screen edge. A=B Fig. 1-4 + OSD POS 24 + A B Fig. 1-4 1-5.
PAGE 2 White Balance Adjustment : Adjustment Menu Screen: PAGE 2-1~5 *User’s picture quality will be cleared when the adjustment menu screen appears. Input signal : White raster Contents of Adjustment : 1. R CUT OFF Contents of Adjustment : 2. G CUT OFF Contents of Adjustment : 3. B CUT OFF Contents of Adjustment : 4. G DRIVE * More than 20 minutes of aging is required 5. B DRIVE before the adjustment. Contents of Adjustment * The whole process should be repeated several times for the adjustment.
3-2. SUB CONTRAST Sub-contrast Adjustment / Adjustment Menu Screen: PAGE 3-1 Input Signal: Color Bar (QIW) croma/OFF Measuring Instrument: Oscilloscope Pattern generator / reader: 105+2.0V 75%White Test Point: S0901 R(R CATHODE) 100%White 1. Connect the oscilloscope to S0901 R. 2. Using the volume keys on the jig remote controller adjust the pedestal level and the voltage of 100% white to 105 ± 2.0V, according to Fig. 3-2. Fig. 3-2 3-3.
PAGE 5 5-1. ATT ALIGNMENT ATT Adjustment / Adjustment Menu Screen: PAGE 5-1 PAGE 5 Input Signal: ANT RF-INPUT / Color Bar Measuring Instrument: Oscilloscope / Pattern generator / reader: LCG-401 Test Point: IC701 2 PIN TV OUT-L 1. Connect the oscilloscope to IC701 2 PIN 2. Using the volume keys on the jig remote controller, adjust the value of IC701 2 PIN to 490 ± 20mVrms. 10 ATT Fig. 5-1 5-2.
TUNER ADJUSTMENT If adjustment elements were replaced for repair, conduct the following set of adjustments. And then, further adjustments should be conducted on the Adjustment Menu Screen. If this set of adjustments was not completed, no further adjustments on the Adjustment Menu Screen can be conducted. The elements whose circuit condition will be altered depending on repair. • VCO coil • SIF coil 6-1.
2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 9620450 Printed in Singapore
