Yaesu FT-208R Maintenance Service Manual page 43

SERVICING
SEG 6
SEG 58
SEG 5C
LCD DISPLAY PIN NO. COM l COM2 COM3
LCD DRIVER PIN NO.
8 7 6
(Q302)
LCD DISPLAY PIN NO. SEG3A SEG3B SEG3C
LCD DRIVER PIN NO.
1 8 1 7 1 6
(Q302)
C O N T R O L U N I T P A RTS LAYO U T
P rod . Lot( Seri ol N o . 0 7000 1 & U P )
Viewed from component side
SEG5A SEG4A SEG3A SEG 2A
SEG 48 SEG 38 SEG 28 SEG 18
SEG4C SEG3C SEG 2C SEG IC SEG IA
SEG l A SEG l B S EG l C SEG2A SEG2B SEG2C
24 2 3 2 2 2 1 2 0 1 9
SEG4A SEG4B SEG4C SEGSA SEGSB SEGSC
1 0
l S 1 4 1 3 1 2 1 1
Viewed from CPU (Q301 ) side
CONTROL UNIT
VOLTAGE CHART (DC VOLTS)
Pin No. 1
Normally SY
TX KEY ON S Y
Pin No. 9
Normally L
SEG6
9 TX KEY ON (H)
3- 1 2
PB-2337 COMPONENT SIDE
Prod.Loi UP
7 &
s
2 3 4 6 7 8
H L L L G L H
3.S 8MHz
L (H) (H) (H) G 3.S 8MHz
1 0 1 1 1 2 1 3 1 4 l S 1 6
L H H H H H L
TONE
H (L) (L) (L) (L) H OUT
3Vp-p
1 s.,.Nos o1xxxx1