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17

 Reset & Remote control stop
  

 When the power is turned on, the reset voltage is input
from the RESET IC to the SUB MPU, LSI and OSD IC
after 5V is supplied to each IC, thereby starting operation.
 When the user enters the STATIC convergence
adjustment mode, or when the serviceman enters the
Convergence adjustment mode in service mode, data on
the present colour system status (NTSC or PAL) , and that
the system has entered convergence adjustment mode is
input from the main MPU to the IC7103 I²C I/O Expander
Pin 15 through the I²C BUS.
 The IC7103 I²C I/O Expander inputs the following output
to the  SUB MPU.  At the same time this Expander
indicates that Serial Data is being received from the
remote controller.
 Further, the information in VDAC from pin 13 of the
IC7103 I²C I/O Expander, stating the normal state or
whether static or dynamic adjustment is to be performed,
is sent to the SUBMPU.
 The SUB MPU sets the remote control terminal pin 110 to
"L"  indicating that the unit has entered adjustment mode,
so that the Main MPU does not accept instructions from
the remote control.
When adjustment is completed, the Sub MPU outputs an
"H" and returns the Main MPU to normal operation.

SUB MPU

21pin

22pin

E²PROM

NTSC

H

L

P - 1

PAL,SECAM

L

H

P - 2

Copy Box

H

H

P - 3

TEST

L

L

P - 4

SUB MPU

20pin

NTSC

L

PAL,SECAM

H

2

1

71

26

20

5V

RESET

Remocon

59

60

1

14

30

15

13

9

10

4

7

P1-P4
Select

MUTE

SDA

SCL

V-DAC

NT/PAL

22

15

20

16

21

11

RCN-IN

110

Remote control Stop  MAIN  SUB

REMOTO CONTROL STOP

18

- memo -

19

- memo -

20

Television & Network Systems Division

Matsushita Electric Industrial Co,. Ltd.