Philips 107T60 - Page 93

107T6 CRT
93
Repair Flow Chart (Continued)
35 EWDRV
To H-deflection
east/west control
7602 base
52, 53
Hsync/Vsync
33, 34
VOUT1/VOU2
Differential input
to 7401 Pin6, Pin7
To 1802 Pin5, Pin6
49 Rotation
Check output
from 0V to 5V
58 KEYBRD
CheckkeyPower,OK, LF,
Brightness and Contrastkeys
Check 2813, 3820
56 Selftest
Check Pin56
1.NoH/V Sync&IF cable Pin5floating -show msg.
2. H/V Sync exist&IFcable Pin5 to ground -normal
3. H/V Sync non-exist&IFca
ble Pin5 to gnd -power saving
4.After 1892&1893 pressed on, then power on
(1895) with IF cable Pin5=L -factory mode
5.After 1892&1893 pressed on, then power on
(1895) without IF cable Pin5=H-burn in mode
55, 54 DDC bus
Check idle status
SDA=Pin55=hi
SCI=Pin54=hi
EEPROM
Check 7802 Pin7
Hi: write enable
Low: write disable
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