Circuit Description - Kenwood VR-405 Service Manual

Audio video surround receiver
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KRF-V4530D/V5030D/V6030D/VR-405/406/414
Pin description of microprocessor : X14,IC1(MN101C35DRA)
Pin No.
Pin Name
1
S. DATA
2
S.BUS
3
SEL. ST1
4
SEL/VOL/PLL DT
5
SEL/VOL/PLL CLK
6
SEL. ST2
7
PLL. CE
8
Vdd (+5v)
9
OSC OUT
10
OSC IN
11
Vss
12
X IN
13
X OUT
14
MMCD
15
Vref-
16,17
KEY2,KEY1
18
MODEL TYPE
19
TH. SENS
20
PROTECT
21
PROTECT2
22
S.LEVEL/CH SPACE
23
PLL DO
24
Vref+
25
26
RESET
27
T. MUTE
28
RF ST
29
RF DT
30
RF CLK
31
VOL.ST
32
DSP INTREQ
33
DTS DET
34
REMOCON
35
DIR ERR
36
DZF
37
RDS.CLK
38
RDS.DAT/CE2
39
DSP/DIR/CORDEC CDIN
40
DSP/DIR/CDOUT
41
DSP/DIR/CORDEC CCLK
42
DSP CS
43
DSP PD
44
DIR CODEC CS
45
DIR CODEC PD
46
NO USE
47-57
1G-11G
58-74
P1-P17
75
PACK CONT.
76
LIMMITER
77
REAR RE
78
CENTER RE
79
FB RE
80
FA RE
6

CIRCUIT DESCRIPTION

I/O
I/O
Serial data signal.
I/O
Serial busy signal.
O
Strobe output to input selector ( IC106).
O
Data output to selector,volume and PLL IC.
O
Clock output to selector,volume and PLL IC.
O
Strobe 2 output to input selector ( IC109).
O
PLL chip enable.
-
Power supply.
O
8MHz clock output.
I
8MHz clock input.
-
Connected to ground.
-
Connected to ground.
-
No used.
-
Connected to ground.
-
Connected to ground.
I
Input terminal of key1 and key2.
I
Discrimination port of models.
I
No used.
I
Detection port of protection signal 1.
I
Detection port of protection signal 2.
I
RDS S level and channel space changeover.
I
RDS PLL data signal input.
-
Reference voltage of AD converter..
CE
I
Chip enable.
I
Reset signal input.
O
Muting signal output to tuner.
O
CE signal output of RF receiver IC.
O
Data signal output of RF receiver IC.
O
Clock signal output of RF receiver IC.
O
Latch output of electric volume.
I/O
Detection port of DSP INTREQ.
I
Detection port of DTS data.
I
Remote control signal input.
I
Detection port of DIR error signal.
I
Detection port of CODEC zero input.
I
RDS clock input.
I
RDS data input./u-COM chip enable 2.
O
Serial data output.
I
Serial data input.
O
Clock output to IC2, IC5 and IC51on X08.
O
DSP chip select.
O
DSP power down.
O
CODEC chip select.
O
DIR CODEC power down.
-
No used.
O
FL grid control(1G-11G).
O
FL segment control(P1-P17).
O
Power pack control.
O
Control port of A class power supply.
O
Relay control terminal of surround speaker.
O
Relay control terminal of center speaker.
O
Relay control terminal of front B speaker.
O
Relay control terminal of front A speaker.
Description

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This manual is also suitable for:

Vr-406Vr-414