Service Manual
Page 79
...MAIN BD through AI Board. XLLON = HIGH, XLLOFF = LOW is oscillated by IC151 and X101. • SCC-B2391 / SCC-B1391 : 28.636363MHz • SCC-B2391P / SCC-B1391P / SCC-B2091P / SCC-B1091P : 28.37500MHz • SCC-2300 : 38.13986MHz 4) IC115 and R138, L104, C128 blocks the MCK(IC101-43) frequency. 5) ECK(IC101-88...43), then supply the comparing signal to VCO block. Therefore, system uses 2 CLOCKS. Samsung Electronics DC voltage is supplied to PLL(IC103). 6) PCOMP signal is selected by u-COM(IC108-21). In SCC-B1XXX(P) series, XRST pulse is made by IC107 and IC1156, then goes to IC114.) ...
...MAIN BD through AI Board. XLLON = HIGH, XLLOFF = LOW is oscillated by IC151 and X101. • SCC-B2391 / SCC-B1391 : 28.636363MHz • SCC-B2391P / SCC-B1391P / SCC-B2091P / SCC-B1091P : 28.37500MHz • SCC-2300 : 38.13986MHz 4) IC115 and R138, L104, C128 blocks the MCK(IC101-43) frequency. 5) ECK(IC101-88...43), then supply the comparing signal to VCO block. Therefore, system uses 2 CLOCKS. Samsung Electronics DC voltage is supplied to PLL(IC103). 6) PCOMP signal is selected by u-COM(IC108-21). In SCC-B1XXX(P) series, XRST pulse is made by IC107 and IC1156, then goes to IC114.) ...