Samsung CF21M Service Manual page 13

10 Schematic Diagrams
9 IC250, #24 IC250, #23 2.20 V (IC250, #11, 32) 3.42 V (IC201, #33) 17 3.16 V (IC201, #32)
10 13 16
CH1 P-P = 2.20 V CH1 RMS = 2.776 V CH1 P-P = 3.42 V CH1 RMS = 2.500V CH1 P-P = 3.16 V CH1 RMS = 2.560 V
10-2 CF21M*