3-1
FA - SERVICING
SERVICING
LARGE SIGNAL
POWER SUPPLY
The FA is a COLD chassis of a single sided circuit board,
developed for a 27”. The power supply section features
four IC’s for voltages sources. The FA chassis has the
capability to meet the Energy Star requirement for a
low power consumption on stand-by mode.
·9Volts, 1Amp ON/OFF Switch Regulator, 221-01460-07
·5Volts, 1Amp ON/OFF Switch Regulator, 221-01460-03
·5Volts, 0.150 Amp Switch Linear Regulator,
0IKE780500P
·Main regulator for Horizontal Deflection (B+), +15V,
Switch mode regulator 223-00061-01.
·Error amplifier 221-00265-03A.
B+
+VAUD
+16VSB
LINE
FILTER
SWITCHING
HYBRID IC
RECTIFER
SECTION
OPTO
DEVICE
PWR CTRL
+5VSBF
STEREO
DECODER
SWITCH & VOL-
CTL
ST AUDIO
SWEEP
TRANSFORME
R
+VAUD@1400mA
+130V@900mA
HV
6.3Vrms
-14VSW
+35VSW
+12~14VSW
+9VSW
+9VSW@55mA
VIDEO
PROCESSOR
+9VSW@120mA
+5VSW@70mA
MICROPROCESSO
R
+5VSBF@27mA
TUNER
+33VSW
+33VSW@15mA
+5VSW@100mA
VERTICAL
DEFLECTION
-14VSW@
HORIZONTAL
DRIVE
+15VSB@100mA
AC LINE
FILAMENT
6.3Vrms@315mA
SHUNT
REGUL AT OR
+5VSB
MPI
(INTERFACE)
+5VSB@2mA
+5VSW
+9VSW@5mA
COMB FILTER
+5VSW@80mA
+9VSW@50mA
SWITCHER
CXA2089S
+9VSW@70mA
+21VL
+12VSB@600mA
+14VSW@
205VSW
ABL
+12VUP
LSP
PROTECTION
SWITCH MODE REGULATOR
The FA chassis employs a switching power supply, quasi-
resonant topology type. The AC line is supplied thru
the bridge rectifier BRX3400 and CX3410 circuit through
the fuse FX3400
(5A @ 250 V fast blow)
, The AC opera-
tion range is between 90 Vrms to 135 Vrms
(see TABLE
1.1)
and a filter, consisting of LX3400, LX3401, CX3401,
CX3403 and CX3408, which is employed before the rec-
tifier circuit to reduce noise from the AC line and vice
versa
(EMI)
.
The voltage output of the rectifier, VDC, is supplied to
the Switch Mode Regulator Power Supply, and its out-
put should be in this range [127 VDC to 352.5 VDC].
The SMPS consisting of ICX3612, ICX3701, ICX3702 and
the chopper transformer TX3600. Through 100 KOHM
resistor (Rst), RX3601 and CX3604 (Cst), which is de-
rived the VCC from CX3410. These feed the pin 3 into
the internal zener diode located within ICX3612.
POWER SUPPLY BLOCK SCHEMATIC
Summary of Contents for RP-29FA40-M
Page 40: ...P NO 3828VD0097A April 2001 ...
