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