AIWA XPKM88AHR/AHC/AHA/
Manual de Servicio

5) Measure DC voltage at each test point with digital multi-meter, and adjust SFR. ADJ. ITEM G2 G0 BRT CONT COLOR(PAL) TINT ADJ. POINT SFR701 SFR702 SFR754 SFR751 SFR752 SFR731 TEST POINT G2 (TP1) G0 (TP2) BRT (TP3) CONT (TP4) ADJ. VALUE 1. 8 ± 0.05V 0.75 ± 0.05V 2.3 ± 0.05V 2.95 ± 0.05V

COLOR (TP5) 3.00 ± 0.05V TINT (TP6) 3.2 ± 0.05V

6) Observe the wave form at each test point with oscilloscope, and adjust SFR. ADJ. ITEM W-BAL (SBR) W-BAL (SBB) ADJ. POINT SFR705 SFR704 TEST POINT G (TP7)/ R (TP8) G (TP7)/ B (TP9) ADJ. VALUE ADJUST R (SFR705) AS SAME LEVEL TO G. (Fig.4) ADJUST B (SFR704) AS SAME LEVEL TO G (Fig.4)

0±0. 01V

G-LEVEL R-LEVEL & B-LEVEL

Fig. 4 W-BAL (SBR & SBB)

7) Push the PRGM key and select all RED picture signal on the LCD. Observe the wave form at the test point with osilloscope, and adjust LPF701 ADJ. ITEM PAL BURST ADJ. POINT LPF701 TEST POINT B (TP9) ADJ. VALUE ADJUST LPF701 AS SAME LEVEL. (Fig.5)

THIS WIDTH BECOMES NARROWEST

2.0 ± 0.1V GND Fig.5 PAL BURST

8) Turn the power off, and set SW102(NTSC/AUTO/PAL) to NTSC position. 9) Activate TEST MODE, and display the 11 STEP MONOTONE PICTURE. (Fig.2)

� 15 �