Read Sony CPD-G420 / CPD-G420S / CPD-G520 / GDM-F520 Service Manual online
CR1 chassis (E)
13
5.
L2 BOARD (only 19F, 21G, 21F series)
INPUT
OUTPUT
+15 V
–15 V
–15 V
GND
IIC SDA
IIC SCL
IIC SCL
LCC NS
POWER
LCC CONTROL
GXSC
GYSC
GYSC
DIGITAL CONVERGENCE
CONTROL
CONTROL
LCC LB
LCC LT
LCC LT
LCC RB
LCC RT
LCC RT
LCC COIL
NS COIL
GREEN CY
GXSC
GYSC
GYSC
LCC NS
5V REG
GXSC
GYSC
GYSC
+15 V
REF
IIC SDA
LCC LB
LCC LT
LCC RB
LCC RT
IIC SCL
LCC NS
GXSC
GYSC
IC 1605
IC 1602
DAC
POWER OP AMP
IC 1601
POWER OP AMP
IC 1604
POWER OP AMP
IC 1603
POWER OP AMP
IC 1600
L2 BOARD
The L2 board contains LCC drive circuit (four corner coils and NS coil) and green convergence yoke drive circuit (HMC/VMC).
The corner LCC control voltage is supplied from the DAC (IC1602) mounted on the L2 board. This DAC is controlled by the micro
controller through the IIC bus.
The LCC_NS control voltage is supplied from the DSP (IC1101) mounted on the DA board.
The DSP is controlled by the micro controller through the IIC bus.
Respective reference voltages are generated from the output voltage of 5V regulator mounted on the L2 board through the resistance
division.
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