Philips 107T60 Service Manual page 91

E. CPU (7804)
check List
3, 2 IIC bus
52, 53, 50, 8
Hsync/Vsync
12, 11, 10 (Q1, Q2, Q3)
S-cap switch
Repair Flow Chart (Continued)
Basic check
Check idle status
SDA=Pin3=hi
SCI=Pin2=hi
6 ABL
Check Sync.
Hsync-in=Pin52
Vsync-in=53
Hsync-out=Pin50
Vsync-out=8
Check Q1-Q3
low: 0
hi: 1
Check CPU Pin16=5V
Pin45/Pin46=48MHz
Pin38=AGND
Check
7802 M24C16
7804 SAA4848PS
Check output
from 0V to 5V
1. Normal
Fhout=Fhin
Fvout=Fvin
2. Self test
Fhout=48KHz
Fvout=72Hz
3. Sync out of range
Fhin>72.8KHz,<28KHz
Fvin>168Hz, <45Hz
V32 17" 71K S-CAPACITOR SWITCH TABLE
Q1
Hor. Freq. (Khz)
<29.00 0
29.00-33.00 0
33.00-36.00 0
36.00-40.00 0
40.00-44.00 1
44.00-47.00 1
47.00-51.00 1
51.00-55.00 1
55.00-58.00 1
58.00-62.00 1
62.00-66.00 1
>66.00 1
107T6 CRT
91
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Q2 Q3
0 0
0 0
1 0
1 1
0 0
0 0
0 1
0 1
1 0
1 0
1 0
1 1