DAEWOO ELECTRONICS DWF-5590D Series, Service Manual, Page: 39 / 63

OSCILLATION UNIT
1) CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
• As the OSCILLATION UNIT is a basic part of the MICOM DRIVE. If the oscillation doesn’t generate, we are able to
consider that the MICOM is destroyed.
• Specification of oscillator
39
CF2, 15
CF1, 14
XT2, 12
XT1, 11
RP2
10M
1.6W
C4 18PF
C5 18PF
33PF
33PF
!
@
Murata 3 Terminal
Ceramic Resonator
(CST12.00MTW)
Kyocera 32.768 KHz
Crystal Cscillator
(KF-38G-13P0200)
–The waveform between the part of
!
and the GND. –The waveform between the part of
@
and the GND.
f=12MHz
t
f=32.768KHz
t
TYPE OF OSCILLATOR MAKER
NAME OF
CONDENSER
OSCILLATOR
C1 C2
12MHz
MURATA CST 12.00 MTW 33PF 33PF
CERAMIC RESONATOR
32.768KHz
KYOCERA KF-38G-13P0200 18PF 18PF
CRYSTAL OSCILLATOR
It is in general use for the MICOM maker’s recommendatory value of condenser which is fit for MICOM’s characteristics.
• The R82(18M
Ω
, 1/4W) is in use to get rid of the initial abnormal oscillatory phenomenon of the 32.768 KHz crystal
oscillator.
Downloaded from www.Manualslib.com manuals search engine