Philips 202P70/00, Service Manual

Page: 35 / 90

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202P7 CRT
35
Repair Flow Chart (Continued)
18 H_UNLOCK
To H-deflection
7462 base
19 MUTE
To H-deflection
7466 base
20 OFF
To Control Board
22 Degauss
Check
active=hi
no active=low
24 Selftest
Check Pin56
1. No H/V Sync&IF cable Pin5 floating
-show msg.
2. H/V Sync exist & IF cable Pin5 to ground -normal
3. H/V Sync non-exist & IF cable Pin5 to gnd -power saving
4. After 1891&1894&1895 pressed on, then
power on(1102) with IF cable Pin5=L -factory mode
5. After 1892&1893 pressed on, then power on
(1102) without IF cable Pin5=H -burn in mode
25, 26 DDC bus
Check idle status
SDA=Pin25=hi
SCI=Pin26=hi
23 KEY_ADC
Check key Power, OK, LF,
Brightness and Contrast keys