Aiwa XP-KM88 Service Manual page 15

5) Measure DC voltage at each test point with digital multi-meter, and adjust SFR.
ADJ. ITEM ADJ. POINT
G2 SFR701
G0 SFR702
BRT SFR754
CONT SFR751
COLOR(PAL) SFR752
TINT SFR731
6) Observe the wave form at each test point with oscilloscope, and adjust SFR.
ADJ. ITEM ADJ. POINT
W-BAL (SBR) SFR705
W-BAL (SBB) SFR704
0±0. 01V
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 ADJ. POINT
PAL BURST LPF701
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)
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TEST POINT ADJ. VALUE
G2 (TP1) 1. 8 ± 0.05V
G0 (TP2) 0.75 ± 0.05V
BRT (TP3) 2.3 ± 0.05V
CONT (TP4) 2.95 ± 0.05V
COLOR (TP5) 3.00 ± 0.05V
TINT (TP6) 3.2 ± 0.05V
TEST POINT ADJ. VALUE
G (TP7)/ ADJUST R (SFR705) AS SAME
R (TP8) LEVEL TO G. (Fig.4)
G (TP7)/ ADJUST B (SFR704) AS SAME
B (TP9) LEVEL TO G (Fig.4)
G-LEVEL
R-LEVEL &
B-LEVEL
TEST POINT ADJ. VALUE
B (TP9) ADJUST LPF701 AS SAME LEVEL. (Fig.5)
Fig.5 PAL BURST
– 15 –
THIS WIDTH BECOMES
NARROWEST
2.0 ± 0.1V
GND