Sony UP-860 Service Manual page 46

5-4. SYSTEM CONTROL SECTION
PRINT preparations
(i) Turn on the power and check that the POWER LED lights .
(ii) Set paper in place, close the door, and check that the PAPER EMPTY LED
goes off.
(iii) Check that the Video signal (EIA or CCIR) is input to the VIDEO INPUT
terminal.
1IC301 —@7)"L" This condition is met, IC301
1C301 —@"L" switches off PAPER EMPTY-
LED. (IC301-@)
* Note 1: When the paper is set in place.
* Note 2: IC301-@9 is the reset terminal. When the power is first turned on, this
pin is held low for a few msec, then set high to end the reset.
5-4-1. Memory write (FETCH) signals from the print key
100mSec
PRINT Key en
REMOTE Key
gee
a Oe
egies
ee
1C301-®, ®
EXT-V
'
Saree
1C301-@,
I
!
I
l
I
I
|
| EIA
16.6mS
br—->| several V
CCiR20mS
Sbit
pe FT
1C301-€9
SCREEN PRINTING
Bask
MODE
COPY
CLOCK
Bbit
soo oS
SCREEN PRINTING
MODE COPY 8 set
FETCH
1€301-@
I 1pSec
Fig. 5-4. Memory write timing chart
Operation
53 us=