Kenwood RX-28 Service Manual page 11

RX-28
CIRCUIT DESCRIPTION
Name
Description
Processing
UNUSED
OPEN
UNUSED
OPEN
UNUSED
OPEN
| SEGMENT 16
FL Segment p
PD (—30 V)
SEGMENT 15 FL Segment o
| PD (—30 V)
SEGMENT 14 |
FL Segment n
PD (-—30 V)
SEGMENT 13
FL Segment m
PD (-30 V)
SEGMENT 12
| FL Segment !
PD (-30 V)
SEGMENT 11 |
FL Segment k
~T PD (—30 V)
SEGMENT 10
4,
FL Segment j
PD (—30 V)
SEGMENT 9
FL Segment i
PD (—30 V)
FL Segment h
PD (-30 V)
SEGMENT 8 |
SEGMENT 7 FL Segment g
PD (-30 V)
SEGMENT 6
FL Segment f
PD (-30 V)
SEGMENT 5
FL Segment e
PD (—30 V)
SEGMENT 4
20
SEGMENT 3
SEGMENT 2
GRID 8
O!lO/O/O/O/O!O/O/O!}O;0;O/;O/0/0
loltere)
FL Segment d
FL Segment c
PD (-30 V)
PD (-30 V)
FL Segment b PD (—30 V)
SEGMENT 1
FL Segment a
PD (-30 V)
FL Grid 9G PD (—30 V)
24
GRID 4
lolke)
25
GRID 3
FL Grid 5G
FL Grid 4G
PD (—30 V)
PD (-30 V)
26
GRID 2
FL Grid 3G
FL Grid 2G
PD (—30 V)
PD (—30 V)
28
GRID 1
[GRID 0
FL Grid 1G
29
INT
—-|O;/O/O;O/O0
Interrupt terminal (unused)
PD (-30 V)
GND
30
TX
32 kHz oscillator terminal (unused)
OPEN
31
TEX | 32 kHz oscillator terminal (unused)
32
Reset terminal
GND
33
RST
UNUSED
34
VDD
Power supply
35 J MODE J/Others
36 LW MODE
37
AM MODE
1610/1700
with LW/without LW
38
|. CH. SPACE
50K/100K
39
DSKO
Deck section key scan 0
DIODE required
40
DKS1
Deck section key scan 1
DIODE required
11