KENWOOD KRC-465 Service Manual

Cover page of KENWOOD KRC-465 Service Manual

Service Manual for KENWOOD KRC-465, downloadable as a PDF file.

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© 2001-10 PRINTED IN JAPAN
B51-7848-00 (S) 1754
SERVICE MANUAL
CASSETTE RECEIVER
KRC-335/565
KRC-365/465/465W
LOUD
B.NR
SCAN
REP
MTL/M.RDM
B.S/RDM
ADJ
AUTO AME
CLK
KRC-335
SRC
OFF
45Wx4
AUD
CRSC
DISC
DOLBY B NR
Front glass
(B10-4122-01)
Knob(1-6)
(K25-1392-03)
Knob(SRC)
(K24-3820-04)
Knob(FM/AM)
(K25-1393-03)
Knob(VOL)
(K25-1395-03)
Cassette lid
(A53-1687-03)
Panel assy
(A64-2532-02)
q KRC-335
Knob(AUD)
(K24-3821-04)
Screw set
(N99-1610-15)
Mounting hardware assy
(J21-9641-13)
Screw set
(N99-1719-05)
Remote controller assy
(A70-2024-05):K,M2
Level
(D10-4589-04)
Plastic cabinet assy
(A02-1486-13)
DC cord
(E30-4783-05):K
(E30-4784-05):M1,M2,M5,M6
MECHANISM EXTENSION CORD
W05-0477-00 (7P)
W05-0609-00 (10P)
Refer to the PARTS LIST
background image
© 2001-10 PRINTED IN JAPAN
B51-7848-00 (S) 1754
SERVICE MANUAL
CASSETTE RECEIVER
KRC-335/565
KRC-365/465/465W
LOUD
B.NR
SCAN
REP
MTL/M.RDM
B.S/RDM
ADJ
AUTO AME
CLK
KRC-335
SRC
OFF
45Wx4
AUD
CRSC
DISC
DOLBY B NR
Front glass
(B10-4122-01)
Knob(1-6)
(K25-1392-03)
Knob(SRC)
(K24-3820-04)
Knob(FM/AM)
(K25-1393-03)
Knob(VOL)
(K25-1395-03)
Cassette lid
(A53-1687-03)
Panel assy
(A64-2532-02)
q KRC-335
Knob(AUD)
(K24-3821-04)
Screw set
(N99-1610-15)
Mounting hardware assy
(J21-9641-13)
Screw set
(N99-1719-05)
Remote controller assy
(A70-2024-05):K,M2
Level
(D10-4589-04)
Plastic cabinet assy
(A02-1486-13)
DC cord
(E30-4783-05):K
(E30-4784-05):M1,M2,M5,M6
MECHANISM EXTENSION CORD
W05-0477-00 (7P)
W05-0609-00 (10P)
Refer to the PARTS LIST
background image
KRC-335/365/465/465W/565
2
BLOCK DIAGRAM
SW5V
B
.U
.14V
B
U5V
B
U14V
FM
ANT
AM
ANT
FM+B
AM+B
PLL+B
PLL-D
A
T
A
VT
IFC
OUT
PLL-CLK
VDD
5V
IF2+B
IF1
GND
S-METER
IF1+B
SD
A
UDIO
OUT
PLL-D
A
T
A
SD
S-METER
SUB+
SUB-
EN2
A
CC-DET
EN1
SCL
MUTE
SD
A
EN3
SW5
PC-DET
P
A-DET
PANEL
HOLD
L-CLK
L-CE
L-DATA S
L-DATA L
MUSIC
*DOLBY
*MTL
EQ-MUTE
MS-CONT
MUSIC
*
DOLBY
*
MTL
EQ-MUTE
MS-CONT
DSI
FWD/REV
PACK IN
M-STBY
CH CON
DATA H
DATA C
REQ H
REQ C
CH CLK
Rch
COM
Lch
MP
IN
AM
MPX
OUT
RR
SW5V
OUT
LR
OUT
RF
LEVEL
SCL
SD
A
OUT
LF
SVR
MUTE
EN1
EN2
EN3
P
.ANT
P
,CON
ILLUM
B
.U
.5V
AM+B
A
UDIO
FM+B
FM+B
AM+B
A
UDIO
8V
B
U5V
Rch
Lch
PA
C
K
T
-END
M-STBY
T
-MODE
FWD
REV
B
U5V
A
UDIO
8V
B
U14V
CHRST
SMUTE
FM+B
AM+B
A
UDIO
8V
A
UDIO
8V
M
OTO
R
B
U14V
SW5V
8
4
10
40
IN
PLA
Y
HEAD
B
U5V
PLL-CLK
T-MODE
T-END
B
U5V
REMO
SW5V
B
U-DET
P-STBY
SVR
P-MUTE
CHMUTE
STBY
CD
L/R
CD
L/R
TAPE L/R
1200mV
400mV
170mV
340mV
T
APE
CD-CH
AM
FM
:1719mV
:3424mV
:550mV
:1727mV
T
APE
CD-CH
AM
FM
:1780mV
:3546mV
:570mV
:1789mV
A
UDIO
8V
T
APE
L/R
(X16)
(X14)
M
M
TUNER
T
APE
MECHA
SW5
SYSTEM
u-COM
KEY
P
AN
5V
MUTE
B
.U
.DET
SURGE-DET
P
A-DET
PC-DET
B.
U
.
AC
C
P-CONT
ANT
-CON
MUTE
DC
CONNECT
OR
PRE
PO
WER
IC
EQ
AMP
E-V
OL
CD/MD
CHANGER
FR
ONT
Lch
FR
ONT
Rch
REAR
Lch
REAR
Rch
REGULA
T
O
R
LCD
DRIVER
LCD
MAIN
SUB
F-Lch
F-Rch
R-Lch
R-Rch
PRE
OUT
J5/J6
J4
SP
OUT
M
OTO
R
5V
D301
IC6
IC5
IC1
IC1
IC2
IC7
TH1
IC10
IC2
AV
R
DSI
REMO
RST
SW
P
AN
IN
SW
A
CC
DET
J2
VO
LT
A
G
E
DRIVER
AMP
SVR
PC-DET
P
A-DET
MUTE
THERMO
PR
O
TECTION
MAIN
M
DRIVER
SUB
MO
T
O
R
ANT
.
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KRC-335/365/465/465W/565
3
COMPONENT DESCRIPTION
q SWITCH UNIT(X16-1520-XX)
REF.No.
FUNCTION
OPERATION
IC1
LCD DRIVER
Scans LCD display control key.
IC2
REMOTE SENSOR
Sensors remote controller signal.
Q1
KEY SCAN SW
Scans key after receiving imitative key input signal.
q SYNTHESIZER UNIT(X14-6880-XX)
REF.No.
FUNCTION
OPERATION
IC1
SYSTEM
µ-COM
Controls FM/AM tuner, the change, cassette mechanism, volume and tone.
IC2
E-VOLUME
Controls the source, volume, tone and FM multiplex detector.
IC4
POWER AMPLIFIER
Amplifies the front L/R and the rear L/R to 45W maximum.
IC5
EQUALIZER AMPLIFIER
Equalizes the tape sound.
IC6
SUB MOTOR DRIVER
Controls the sub motor.
IC7
POWER SUPPLY
B.U.:5V, AUD:8V, FM+B:8V, AM+B:8V.
IC10
MUTE CONTROL LOGIC
Controls muting.
Q10
BACK-UP DETECTION
Output becomes "L" when the back-up voltage becomes more than 9V.
Output becomes "H" when the back-up voltage becomes less than 9V (momentary
power down).
Q11
SERGE DETECTION
Output becomes "L" when the back-up voltage becomes more than 18V (Momentary
power down). Output becomes "H" when the back-up voltage becomes less than
18V.
Q41
PRE MUTE DRIVER
When input becomes "L", output becomes "H" (Preout mute).
Q50
5V SW
Outputs 5V to the SW 5V power supply when input becomes "L". SW 5V power
supply line is cut off when the input becomes "H".
Q51
POWER ANTENNA
Output becomes "H" when P-ANT output is short-circuited (P-ANT OFF).
DETECTION
Output becomes "L" when FM/AM signal does not exist.
Q52
P.CON. DETECTION
Output becomes "H" when P.CON output is short-circuited (P.CON OFF).
Q190
PANEL SW
Outputs 5V to the panel VDD line when panel is attached.
Panel VDD line is cut off when panel is taken out.
Q191
DSI DRIVER
DSI lights when input becomes "L". DSI turns off when input becomes "H".
DSI turns on and off when panel is taken off.
Q221-224 PRE MUTE
Works when input becomes "H". Being cancelled when input becomes "L".
Q251
SVR
"L" when input becomes "H".
Q501
SUB MOTOR AVR
Outputs 7.3V when AUD 8V exists. Output does not exist when AUD 8V does not
exist.
Q551
MAIN MOTOR SW
Outputs 14V when input becomes "L" (Main motor drives).
Q552
MAIN MOTOR SW
Output becomes "H" when input becomes "L".
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KRC-335/365/465/465W/565
4
MICROCOMPUTER'S TERMINAL DESCRIPTION
q (X14-) IC1:
µ-COM
PORT No. PORT NAME I/O
FUNCTION
OPERATING CONDITION
1
X IN
I
Clock: 4.5MHz.
2
GND
-
GND.
3
L-DATA L
I
LCD driver data.
4
L-DATA S
O
LCD driver data.
5
L-CLK
O
LCD driver clock.
6
L-CE
O
LCD driver chip enable.
7
PANEL
I
Panel detection.
8
PLL-DATA
I/O Tuner data.
9
PLL-CLK
O
Tuner clock.
10
SD
I
Tuner band muting.
11
CH-DATA C
I
5-line CD-CH communication data.
12
CH-DATA H
O
5-line CD-CH communication data.
13
CH-CLK
I/O 5-line CD-CH communication clock.
14
CH-REQ C
I
5-line CD-CH communication request.
15
MOTOR
O
Cassette mechanism main motor.
16-20 -
-
-
21
CH-CON
O
5-line CD-CH communication control.
22
CH-REQ H
O
5-line CD-CH communication request.
23
MUTE
O
Muting.
24
IC2-SCL
O
IC2 clock.
25,26 -
-
-
27
IC2 TYPE 0
I
Model discrimination.
28
-
-
-
29
TYPE 1
I
destination discrimination.
30
TYPE 0
I
destination discrimination.
31
VDD
-
Power supply.
32
IC2-SDA
I/O IC2 data.
33
SW 5V
O
SW 5V control.
34
P-MUTE
O
Power IC muting.
35
P-STBY
O
Power IC stand-by.
36
SVR
O
Power IC discharge control.
37
EN1
O
Power supply IC control.
38
EN3-1
O
Power supply IC control.
39
EN3-0
O
Power supply IC control.
40
EN2-1
O
Power supply IC control.
41
EN2-0
O
Power supply IC control.
42
-
-
-
43
MS-CONT
O
Tape signal sensitivity switch.
44
BEEP
O
Beep.
45
BU-DET
I
Back-up detection.
46
P.CON-DET
I
Power control short-circuited detection.
47
P.ANT-DET
I
Power antenna short-circuited detection.
48
MUSIC
I
Tape signal detection.
49
METAL
O
Normal/Metal tape switch.
50
DOLBY
O
Dolby switch.
51
EQ-MUTE
O
Tape equalizer muting.
52
FWD/REV
I
Cassette mechanism running direction.
53,54 -
-
-
55
PACK-IN
I
Cassette mechanism pack-in.
56
REMOTE
I
Remote signal shape.
57
-
-
-
58
DSI
O
Disable System Indicator.
59
SUB+
O
Cassette mechanism sub motor.
60
SUB-
O
Cassette mechanism sub motor.
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KRC-335/365/465/465W/565
5
KRC-335/365/465/465W/565
6
MICROCOMPUTER'S TERMINAL DESCRIPTION
TEST MODE / ADJUSTMENT
1. How to enter the test mode
· Reset the unit while holding the "FM" key and preset "6"
key.
· All indication segments should go ON at the beginning
of the test mode.
2. How to release the test mode
· Simply reset the unit.
3. Audio adjustment
· Enter the audio mode by pressing the "AUD" key.
· Set the volume level to be +5dB. In that case, "30" should
be shown on the display.
· Loudness OFF.
· The BASS/MIDDLE/TREBLE and BALANCE/FADER
can be adjusted to the full-boost/full-cut and full-front/
full-rear each by pressing the "UP" and "DOWN" key in
3 steps range.
No.
ITEM
INPUT
OUTPUT
RECEIVER
ALIGNMENT
ALIGN FOR
FIG
SETTINGS
SETTINGS
SETTINGS
POINTS
CASSETTE DECK SECTION
Head azimuth
Adjust so that output
1
AZIMUTH
TCC-153
SP OUT
TAPE PLAY
screw
level in playing "FWD"
(b)
10kHz
(FWD/REV)
and "REV" becomes
(ME1)
maximum each.
DOLBY
Connect an
VR1 (L ch)
2
(PLAY BACK
TCC-130
AC voltmeter
TAPE PLAY
VR2 (R ch)
300mv
LEVEL)
to CN5 (X14-)
(X14-)
ADJUSTMENT
BALANCE/FADER/BASS/TREBLE : CENTER
T.ADV/METAL/DOLBY NR/AUTO : OFF
PORT No. PORT NAME I/O
FUNCTION
OPERATING CONDITION
61,62 -
-
-
63
IC2 TYPE 1
I
Model switching.
64
T-MODE
I
Cassette mechanism mode pulse.
65
ACC-DET
I
ACC detection.
66
S-METER
I
Tuner signal meter.
67
HOLD
I
Clock stop mode.
68
VDD
-
VDD.
69
M-STBY
I
Cassette mechanis stand-by.
70
T-END
I
Cassette mechanism end.
71,72 -
-
-
73
VDD
-
VDD.
74-76 GND
-
GND.
77,78 -
-
-
79
GND
-
GND.
80
X OUT
O
Clock 4.5MHz.
(b) AZIMUTH
PANEL FRONT
FWD
REV
TESTMODE

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