Kenwood KRC-363L User manual

RAC Soap. KENWOOD
SERVICE MANUAL
©1988-5 PRINTED IN JAPAN
isto} Brcioxcy 410/00 (@) Br sc4
Knob (BASS, TREBLE) Knob (EJECT) Escutcheon Knob (REW) Knob (FF) Knob ass’y (UP/DOWN)
(K29-3227-08) x 2 (K27-1906-08) (BO1-0400-08) (K27-1908-08) (K27-1907-08) (K29-3233-08)
|
Knob (FADER) = Knob (VOLUME) Knob (LOUD, AME) Panel ass'y * Knob ass'y (FM/AM)
(K29-3229-08) (K29-3228-08) (K29-3230-08) x 2 {A20-) (K29-3234-08)
Front and top plate
(A52-0121-08)
Output cord ass’y
(E30-2403-05)
Photo is KRD-363D.
« Refer to parts list on page 43.

KRC-363D/L
CONTENTS/DISASSEMBLY
FOR
REPAIR
CONTENTS
DISASSEMBLY
FOR
REPAIR
.........-.------
2
PC
BOARD
(FOIL
SIDE
VIEW)
...............
29
BLOCK
LEVEL
DIAGRAM
...........--------
4
SCHEMATIC
DIAGRAM
...........0
200
eee
33
CIRCUIT
DESCRIPTION
..........--2-0
ee
eee
5
EXPLODED
VIEW
(MECHANISM)
.............
41
MECHANISM
OPERATION
DESCRIPTION
........
7
EXPLODED
VIEW
(UNIT)
........--.-.-005-
42
ADJUSTMENT
..
20... 02.00
eee
eee
eee
eee
19
PARTS
EIST
accents
vag
se
ee
ols
eee
oe
ets
43
REGEAGE:
23
fed
ht
ocean
exe
ole
ole:
atte
Saeen
21
PACKING
.......
0.0
eee
ee
wees
51
ABGLEICH
a4
ob
eae
sense
Geet
BG
ea
23
SPECIFICATIONS
.............04-
BACK
COVER
PC
BOARD
(COMPONENT
SIDE
VIEW)
.........
25
DISASSEMBLY FOR REPAIR
1. Remove the screw (‘®) holding the top cover, and then
take off the top cover.
2. Remove the 3 screws (‘@) holding the bottom cover,
and then take off the bottom cover together with the
insulating paper sheet.
. Remove the Main Volume contro! knob ( @).
4. Remove the 2 screws (@) holding the panel escutch-
eon, and then take off the escutcheon.
Ww
5. Remove the 2 screws (@) holding the front panel, and
then take off the front panel.
6. Remove the 2 screws (@) holding the Cassette Mecha-
nism Ass’y, disconnect the 2 connectors (3) ), and then
take off the Mechanism Ass’y.
7. Remove the 5 screws (©) holding the sub-panel, re-
move
the
nut
of
the
volume
control
(®),
disconnect
SK
ay
ke
the
2
connectors
(®)
where
flexible
cables
are
con-
we
rT
i
nected,
and
then
take
off
the
sub-panel.
wl
|
t
|
A
Co
®
INO
Q\
7g
0 = 2
Y

KRC-363D/L
DISASSEMBLY FOR REPAIR
DISASSEMBLY OF HOLDER (ACTION PLATE)
1. Remove the screw (@) from the holder (action
plate [110]).
2. Remove the two springs (Q) from mechanism
chassis (801).
3. Hold down the EJECT button (@) with one hand.
4. Press the lever (42) with your other hand, move
the holder (action plate [110]) toward the motor,
and remove the lever (42) from projection(@)of
the mechanism chassis (801) (G}).
5. Push the holder (action plate [110]) forward.
When the projection of the arm (action [27])
reaches point(A), release the EJECT button (@).
REASSEMBLY OF HOLDER (ACTION PLATE)
1. Align the projection of the mechanism chassis
(801) with the hole in the arm (action [27]) (@).
2. Align the two tips (@) of the holder (action plate
{110]) with the claws of the holder (cassette
case [111]).
3. Insert the formed wire (99) (@) into the hole of
the lever ass‘y (EJECT) (15).
4. Align the left claw of the holder (cassette case
[111]) with the mechanism chassis (@).
5. While holding the arm (action [27]) with one
hand, push the EJECT button (@).
6. Insent the projection of the arm (action [27]) into
point @) in the side of the holder (action plate
[110]) (@).
7. Push the lever (42) outward (@) take out the
projection of the mechanism chassis (801) from
the hole in the holder (action plate [110]).Release
the EJECT button.
8. Align the projection (@) of the mechanism chas-
sis (801) with the hole of holder (action plate
[110]) with the screw.
9. Secure the holder (action plate [110]) with the
screw (@).
10. Mount the tention springs (79) and (74) on the
mechanism chassis (801) (@).

KRC-363D/L
BLOCK LEVEL DIAGRAM
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KRC-363D/L
CIRCUIT DESCRIPTION
Description of Components
MAIN UNIT
Cc t
Use/Function Operation/Condition/Compatibility
Parts No.
10501
C601
cao | Bu40616° | CMOS AND, 4 Lines
ica02_| Bu4069
1C803_| uPD1716-696
Switching iB . : 7 :
DTC114Y (for MW STOP SENS set up) VC-E = 3.5V during an MW seek operation, VC-E = OV in STOP mode.
28C2021 Switching (MW/LW select)
Turns ON in MW mode : VB-E = 0.6V, VC-E = 2.2V
VC-E = OV in LW mode. KRC-363L only.
Q252
Stabilizer
;
5
2SC2021
(forthe
miererosesiod
Power
supply
for
the
microprocessor
and
CMOS
ICs,
VE
=
5.6V.
Switching
Turns
ON
when
power
is
switched
ON,
se
OD
IZeoM
(for
the
indicator
lamp)
VB-E
= 0.6V
(The
indicator
lamp
lights.).
Q403 2SD1 469 Switching (AM power supply) Turns OFF in MW/LW mode, VE = 8.3V. Turns OFF in FM mode, VE = OV.
0404 2SA874 Switching (FM power supply) Turns ON in FM mode, VE = 8.3V. Turns OFF in MW/LW mode.
aos | DTCTaaTe
Q604 | OTCTASTF
2SA957
agoi_| 2sc2021
aso2 | 2sK246Y
aod
Q804 MW/LW tuning voltage set, VE = 1.0 ~ 8.0V (fmin ~ fmax).
asos | DTAI14YF Smenine , VC = 5V when power is turned ON, OV when power is OFF.
(microprocessor CE pin)
agog | 2sc2021 Sting
(microprocessor CE pin)
ae ' Switching for DK VR pull-up. Turns OFF when the DK signat is present.
sei eo DIES SACOG Fn ouput Turns ON when the DK signal is not present. KRC-363D only.
Q405 2SD1225M Stabilizer (Radio power supply) | Power supply for the radio, VE = 8.8V
Switching 2: 7"
Q406 28C2021 (AM/EM power supply) Turns ON in FM mode, VB-E = 0.6V, VC-E = OV
ie) ~~)

KRC-363D/L
CIRCUIT DESCRIPTION
Cc t
Use/Funetion Operation/Condition/Compatibility
Ea
\G701 | ANG262N _|T.ADVitepecvence) | SSC~*
ice01 | TOAIS79
jca02 | AN6SE6 | Op ame.
Q151 DOTC144EF Switching (FM ST indicator)
aid | DTAITAVF
a701 | DTCI4YF | Switching (T. ADV)
a7o2
VOLUME UNIT
Operation/Condition/Compatibility
lRet.No.| Parts No.
[060s [2801469 | Switching (Mute) | For audio muting ina preet or eek operation SSS
PRE AMP UNIT
ee
1€301 BA3406AL Head amp. 2-channel $C Head amp. with equalizer and meta! tape select circuit.

KRC-363D/L
MECHANISM OPERATION DESCRIPTION
Mi 54 52 83 53 36 5950 35 3416 24 25
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KRC-363D/L
MECHANISM
OPERATION
DESCRIPTION
LOADING
Insert a cassette tape (@).
2.
The
cassette
guide
(118)
pushes
te
lever
(reverse
[42])
(@).
3.
The
lever
(reverse
[42])
turns
in
the
direction
of
the
arrow
and
releases
the
lock
of
the
holder
(ac-
tion plate [110]) (@).
_
4.
Through
the
lock
releace
of
the
lever
(reverse
[42]),
the
arm
(action
[27])
is
pulled
by
the
ten-
sion
spring
(74),
which
turns
the
holder
(action
‘o.
[110)}).
The
holder
(action
plate)
descends
(@).
5. Through the descent of the holder (action plate
[110]), the holder (cassette case [111]) also
descends (@).
6. As the holder (cassette case {111]) descends,
the cassette tape pushes the lever (lock plate
{29]). The lever (lock plate {29]}) then releases the
lock of the lever assembly (head plate [14]) (@).
7.
As
the
arm
(action
[27])
turns,
the
lock
of
the
lever
assembly
(eject
[15])
is
released
(@).
8.
The
lever
assembly
(eject
{15])
is
pulled
by
the
tension
spring
(79)
and
moves
forward
(@).
9.
Through
the
movement
of
the
lever
assembly
(eject
[15]),
the
lever
(49)
also
moves
forward
and
turns
on
the
slide
switch
S1.
As
the
slide
switch
S11
is
turned
on,
electricity
is
supplied
to
the
motor
assembly
(M1)
(@).

10.
11.
12.
KRC-363D/L
MECHANISM OPERATION DESCRIPTION
As the holder (cassette case [110]) descends, the
Cassette tape pushes the lever (lock plate {29]).
The lever (lock plate [29]) then releases the lock of
the lever assembly (head plate [14]) (@).
The lever assembly (head palte [14]) is pulled by the
tension spring (89) and moves forward (@).
Through the forward movement of the lever as-
sembly (head plate [14]), pinch roller assemblies
(R & F (64, 65]) make close contact with the
shaft of the flywheel assembly (R[8]) through the
formed wire (101) (@).

KRC-363D/L
MECHANISM OPERATION DESCRIPTION
13. The rotation is transmitted from each gear (52
— 54 — 55) to the gear assembly (reel base [50])
of the take-up side (@).
14. The gear assembly (reel base [50]) of the pay-
out side is pushed toward the slider assembly
(12) by the lever (33) and the gear (take-up [55})
is disengaged in the direction of the arrow (@).
PROGRAM
1.
Push
both
levers
(FR
[40]
and
FR
[41])
by
hand
at
the
same
time
(@).
2.
The
calking
of
the
lever
assembly
(reverse
[16])
is
sandwiched
between
the
lever
(FR
[40])
and
the
lever
(FR
[41]),
and
pushes
the
lever
assem-
bly
(reverse
[16])
(@).
3. The lever assembly (reverse [16]) moves the arm
(36) (@).
4. The arm (36) releases the lock of the gear assem-
bly (switch [53]) (@).
5.
The
torsion
coil
spring
(83)
pushes
the
cam
of
the
gear
assembly
(switch
[53])
in
the
direction
of
the
arrow
(@).
6. The gear assembly (switch [53]) is pushed by the
torsion coil spring (83), turns in the direction of
the arrow, engages in the gear assembly (take-
up [52]), and makes a half-turn (@).
7.
The
arm
(35)
functions
as
a
stop
temporarily
at
this
time;
the
stop
is
released
when
the
reverse
lever
returns
(@).
8.
The
muting
during
the
program
is
done
by
the
leaf
switch
S3
mounted
on
the
lever
assembly
(side
panel
[39])
(@).
10