Panasonic BT-M1950Y Service Manual page 88

l:j
l•Ml~OUT
ev
sync
The signal from 0514 collector goes to IC509 pin 13 and to IC507 pin 5, then from IC 507 pin 6
to
!C509 pin 12
and IC508 pin 11. The IC509 signal inputs are switched by -PULSE CROSS from the MPU. The selected signal
goes from pin 14 to IC507 pin 11, then as V sync from pin 1
o.
The V sync position changes according to the Pulse
Cross switch on/off state. (When the switch is off, the IC507 pin 5 signal is obtained from pin 11.
FROM V
SYNCSEPA----t----
0514
IC507 SPIN
PULSE CROSS
SW:ON
IC507 1 lPIN
+5V
+5V
IC507
V. SYNC
DELAY
V SYNC
TO IC508@
Fig. 4·3 V sync circuit
IC5O9
(2/3)
IC_S_0_7_1_0P_I_N __ _._ ________
~n._ _ _.__ _______ _
IC507 SPIN
I II\Nl,~NV/
I I
I I
IC_S_07_10_P_IN __
-1n._ __________ n .... ______ _
Fig. 4-4 V sync timing 1
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