Kenwood KRFA 4030 E Service Manual

Page 2

AR7404(K) COVER1,1P( 1/10/0010:49AM \°-/2

F\
\/

AR-404/KRF-A4030/A4030E/A4030-S

CONTENTS / ACCESSORIES / CAUTIONS

Contents

CONTENTS / ACCESSORIES / CAUTIONS
CIRCUIT DESCRIPTION.
ADJUSTMENT ................. ..
PC BOARD ................................................................ 7

Accessories

SCHEMATIC DIAGRAM
EXPLODED VIEW
PARTS LIST .................... .
SPECIFICATIONS .................................................... 27

FM indoor antenna (1)
(mousse-05)

AM loop antenna (1)
(T90-0852-05)

Remote control unit (1)
(A70-1266-05): RC-R0709 ........ KPMX
(A70-1267-05): RC-R0708 ........ E1 E2E3

Batteries (Hoe/AA) (2)

AC plug adaptor (1)
(E03-O115-05)

*Use to adapt the plug on the power
cord to the shape of the wall outlet.
(Accessory only for regions w here use
is necessary.)

Cautions

defirgfl'e Microcarpla'

If the microcomputer may malfunction (unit cannot be
operated, or shows an erroneous display) if the power cord
is unplugged while the power is ON, or due to some other
external factor. If this happens, execute the following pro»
cedure to reset the microcomputer and return the unit to its
normal operating condition.

FuuSAaflCa'ah

Unplug the power cord from the wall outlet, then
plug it back in while holding down the POWER key.

WM U.S.A. at! m
With the power cord plugged in, turn the POWER lazy
OFF. Then, while holding down the ON/ STANDBY
key, press the POWER key.

- Please note that resetting the microcomputer will clear
the contents of the memory and returns the unit to the
state it was in when it left the factory.

Page 5

Fdrwlxiz 1/10/0010:54AM «>91

we

AR-404/KRF-A4030/A4030E/A4030-S

CIRCUIT DESCRIPTION

4.2 Microprocessor pin descriptions: X09,IC51

Pin No. Pin name l/O Description Active
1,2 (39,610 0 FL grid control (9,10).
3 NC - u-Com +5V power supply.
4 RDS,CK | RDS IC clock input control. (E type only)
5 RDS,DT | RDS IC data input control. (E type only)
6 NC | u-Com +5V power supply.
7 VOL.ENC.A | Volume encoder A (CW) signal.
8 REMOCON | Remote control signal input.
9 VOL.ENC.B | Volume encoder B (CCW) signal.
10,11 NC - Unused.
12~14 KRO~KR2 | Key return (0~2).
15 PROTECT | Protection detection signal input. H: Protection ON
16 S.DATA I/O Serial communication data.
17 S.BUSY I/O Serial communication busy.
18 E2.DATA l/O E2 PROM data.
19 E2.CLK 0 E2 PROM clock.
20 SEL.ENCZ CW | Selector encoder A(CW) input.
21 SEL.ENCZ CCW2 | Selector encoder B(CCW) input.
22 MLT. ENC3 CW3 | Multi control encoder A(CW).
23 MLT. ENC3 CCW3 | Multi control encoder B(CCW).
24 8/16 | Serial communication 8bit/16bit changeover.
25~27 NC - Unused.
28 AV REF - Analog reference voltage (+5V).
29 S.LEVEL | Signal level A/D input. (E type only)
30~32 NC - Unused.
33 PLL.DO l PLL IC DO signal input. (E type only)
34 PLL.STEREO l TUNER stereo signal input. L: STEREO
35 PLL.SD | TUNER SD signal input. L: TUNED
36 RCV.CE l Receiver chip enable signal input. L: ENABLE
37 AVSS - Analog ground.
38 RESET | u-Com reset.
39 EXTAL | Main clock(8MHZ).
40 XTAL - Main clock(8MHZ).
41 V88 - u-Com ground.
42 TX - Unused.
43 TEX | Ground.
44 VDD - Analog power supply (+5V).
45 VFDP - FL power supply(-33V).
46 SELSTB O TCQ164AF strobe, H: LATCH
47 SEL/PLL.DT O Selector/PLL IC data signal output.
48 SEL/PLL.CK O Selector/PLL IC clock signal output.
49 PLL.CE O PLL IC CE signal output.
50 T.MUTE 0 Tuner mute control. L: MUTE ON
51 A.MUTE 0 Audio mute control. L: MUTE ON
52 NC - Unused.
53 10dB.ATT 0 Volume 10dB attenuator control. L: ATT ON
54 VOL.DT 0 Volume |C(M62492FP) data control.
55 VOL.CK 0 Volume |C(M62492FP) clock control.
56 VOL.STB 0 Volume |C(M62492FP) strobe control.
57~59 NC - Unused.
60 RELAYA 0 SP. relay A control. H: RELAY ON
61 RELAY.B 0 SP. relay B control. H: RELAY ON
62,63 NC - Unused.
64 POWERRLY 0 Power relay control. H: RELAY ON
65 STANDBYLED O STANDBY LED control. H: LED ON
66~71 NC - Unused.
72 LIMITER 0 Output power control at SP. (A+B). K/M/X only.
73 SW MUTE - Unused.
74,75 KSG/KS7 0 Key scan 6,7.
76~81 P1/KSS~P6/KSO 0 FL segment 1~6/key scan 5~0.
82~88 P7~P13 0 FL segment 7~13.
89 VDD O u-Com +5V power supply.
90~92 P14~P16 0 FL segment 14~16.
93~100 G1~G8 0 FL GRID 1~8.

#