Sony CPD-G420 / CPD-G420S / CPD-G520 / GDM-F520 Service Manual ▷ View 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.
CR1 chassis (E)
14
6.
N BOARD
6-1.
GENERAL
The N board comprises only the micro controller inputs and outputs and relevant peripheral applications.
The pin functional description of N board connector (CN1104 on D board) as viewed from the set is substitutable with the D board
circuit description, and here, the micro controller inputs and outputs in the N board are described.
Arrangement on A side of N Board :
CN1001
CN1001
(EEP ROM)
X1001
(X'TAL)
IC1001
(
µ
-COM)
CN1003
N
6-2.
FUNCTION
The micro controller controls mainly five functions:
(1) Power system control by I/O output
(2) Deflection circuit control by I/O output
(3) Control of IC's (OSD IC, Pre-AMP, DSP IC, and DAC IC on L2 board depending on the model) through IIC bus
(4) Direct circuit control by PWM output (G2 only)
(5) DDC communication
The information necessary for the above mentioned controls is taken through the bus, or A/D and I (input port) in the following list, and
processed by the software.
*For the detailed operational description, refer to the Software Specifications.
The following shows the pin assignment of the micro controller (IC1001).
#
Port
I/O
Name
Function
1
P30/RD
I/O
S0 (LSB)
[OUT] H: On, L: Off [IN] H: Normal, L: Short
2
P31/WR
I/O
S1
[OUT] H: On, L: Off [IN] H: Normal, L: Short
3
P32/HWR
I/O
S2
[OUT] H: On, L: Off [IN] H: Normal, L: Short
4
P33/WAIT
I/O
S3
[OUT] H: On, L: Off [IN] H: Normal, L: Short
5
P34
I/O
S4
[OUT] H: On, L: Off [IN] H: Normal, L: Short
6
P35/TA6IN
I/O
S5
[OUT] H: On, L: Off [IN] H: Normal, L: Short
7
P36/TA7OUT
I/O
S6 (MSB)
[OUT] H: On, L: Off [IN] H: Normal, L: Short
8
P37/INT4
I/O
S7
[OUT] H: On, L: Off [IN] H: Normal, L: Short
9
P60/INT0
I
ECO SW
Edge trigger for wake up from stop mode
10
P61/CTS0/INT1
I
VRETRACE
Rising edge trigger for V retrace task
11
P62/SCOUT/INT2
I
MOVE DET
Rising/falling edge detection for move sensor (TBD)
12
P50/AN00
A/D
COM LUM
Luminance sensor, 10bit A/D
13
P51/AN01
A/D
WAKE UP
Trigger for "In power save OSD indicator"
14
P52/AN02
A/D
15
P53/AN03
A/D
16
P54/AN04
A/D
T AMB
Ambient temperature detection, 10bit A/D
17
P55/AN05
A/D
VX
Geo X sensor, 10bit A/D
CR1 chassis (E)
15
#
Port
I/O
Name
Function
18
P56/AN06
A/D
VY
Geo Y sensor, 10bit A/D
19
P57/AN07
A/D
HV DET
HV detection, 10bit A/D
20
P40/AN08/ADTRG
A/D
ABL DET
ABL detection, 10bit A/D
21
P41/AN09
A/D
IK SIGMA
Thermal drift detection, 10bit A/D
22
P42/AN10
A/D
LOW B DET
Low B detection, 10bit A/D
23
P42/AN11
A/D
KBD
Keyboard detection, 10bit A/D
24
VREFH
+5V
25
VREFL
GND
26
AVSS
GND
27
AVCC
+5V
28
P70/TA1OUT
PWM
G2
G2 control, 8bit PWM
29
P71/TA3OUT
PWM
30
P72/TA5OUT
PWM
31
P73/TB0IN0/INT5
32
P74/TB0IN1/INT6
I
POC
H: Normal, L: Power on clear, falling edge detection
33
P75/TB0OUT0
34
P76/SCK0/INT3
I
LOCK/UNLOCK
H: Locked, L: Unlocked, falling edge detection
35
P80/SDA0/SI0
I/O
I2C SDA
Data for internal I2C bus
36
P81/SCL0/SO0
O
I2C SCL
Clock for internal I2C bus
37
P82/TXD0
I/O
ECS TXD
Data transmit for ECS
38
P83/RXD0
I
ECS RXD
Data receive for ECS
39
AM0
I
+5V
40
DVCC1
+5V
41
X2
Crystal
42
DVSS1
GND
43
X1
Crystal
44
REGOUT
O
3V regulator output, only for Mask
45
AM1
I
+5V
46
RESET
I
RESET
Reset pulse input
47
EMU0
O
Open
48
EMU1
O
Open
49
P84/SDA1
I/O
DDC SDA 1
Data for DDC 1
50
P85/SCL1
I
DDC SCL 1
Clock for DDC 1
51
P86/SDA2
I/O
DDC SDA 2
Data for DDC 2
52
P87/SCL2
I
DDC SCL 2
Clock for DDC 2
53
ALE
O
Open
54
P00/AD0
O
(WDT PULSE)
WDT pulse (20msec)
55
P01/AD1
56
P02/AD2
57
P03/AD3
O
FAN SW
H , L *Not Used
58
P04/AD4
O
REMOTE POWER
H: Power on, L: Power off
59
P05/AD5
O
HEATER
H: Heater on, L: Heater off
60
P06/AD6
O
DEGAUSS
H: Degauss on, L: Degauss off
61
P07/AD7
62
P10/A8/AD8
I/O
EEPROM SDA
Data for I2C EEPROM
63
P11/A9/AD9
O
EEPROM SCL
Clock for I2C EEPROM
64
P12/A10/AD10
O
WRITE PROTECT
H: Write disabled, L: Write enabled
65
P13/A11/AD11
66
P14/A12/AD12
CR1 chassis (E)
16
#
Port
I/O
Name
Function
67
P15/A13/AD13
68
P16/A14/AD14
69
P17/A15/AD15
70
P20/A0/A16
I
DDC GND 1
H: Host disconnected, L: Host connected
71
P21/A1/A17
I
DDC GND 2
H: Host disconnected, L: Host connected
72
DVSS2
GND
73
NMI
+5V
74
DVCC2
+5V
75
P22/A2/A18
76
P23/A3/A19
77
P24/A4/A20
78
P25/A5/A21
O
LED RED
H: On, L: Off
79
P26/A6/A22
O
LED GREEN
H: On, L: Off
80
P27/A7/A23
I
INPUT SELECT
H: Input 2, L: Input 1 (Pig tail)
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