Realistic HTX-100 Service Manual page 53

INTEGRA TED CIRCUIT
IC402
r-------
- - - - - --
I
In
---
PIN NO Voltage PIN NO Voltage
1 5 16
~
(F.Knob)
- -
2 5 17 -ruL (F.Knob)
I
-- -
3
--h
5
I
18 0
f--
----- ----
4 19 3.8
r-------- - ----- r------- - -
UP/ DOWN ,STEP, MEMO,MOO£
- --- - - - - - -
r----- - - --- -- - -···--- -- - ---- -- - ----- - -
5 5
lflrllll
STORE
20 0
--
-- - - ---
6 5
21
0
--
7 5
I
22
0
(Freq. & TxRx Change)
I
--
8
500K. STEP. DOWN ON
MEMO UP STORE MODE ON 23 0 (Freq. & TxRx Change)
.JIIUL
- -
~~ffiililll
500K . STEP. DOWN STORE.
111111111111
...LlJ.._
--
9
MEMO UPON
MODE ON
24
0
(Freq. & TxRx Change)
500K . STEP, DOWN, MEMO,
r---
I I
I
10
STORE MODE ON
UPON
25 0 (Freq. & TxRx Change)
11 5
26
5
--
12 0 27
.
5
--
- -
13 28 0
14 0 29 0
15 0 30 5
O.*kHz
0* 1* 2* 3* 4* 5* 6* 7* 8* 9*
Pin No.
31 0 0 0 0 5 5 5 5 5 5
32 0
5 5 5 0 0 0 5 5 5
- -
c - - - - - -
- - ----
33 5 0 5 5
0
5 5 0 5 5
34 5 0 0 5 5 0 5 0 0 5
35 0 0 0 5 0 0 5 5 0 0
r---
36 0 0 0 0 0 5 0 5 0 5
--
PIN NO Voltage PIN NO Voltage
-- -
37 0 49 0
38 0 50
5
39 5 0
(Push Mic up SW) 51 0
40 5 0 (Push Mic Down SW) 52 5
41
5
0 (Push PTI ON Tx) 53 5
42 5 0 (F. LOCK SW ON) 54 5
43 0 5Vp-p (Power ON)
44 5
55 0
LCD ChanQe
___r-'fl_
45 2.5 4Vp-p (2.00 MHz)
56 5 (Tx) 0 (Rx)
46 2.5 5Vp-p (2.00 MHz)
57 5 (Tx)
47 0
58 5
48 5
-54-