Jvc KSRT 424 Service Manual

Page 1

KS s RT424 C/J

JVB

, SERVICE MANUAL

KS - RT424 C/J

Area Suffix
c."
J,..

Canada

Contents

I ,Instructions ------------------------------------ Page2 -.Location of P.C.Board parts and Parts List - 38
-.Location of Main Parts ---------------------------- 18 [E .Exploded View of Enclosure Assembly

EllRemoval of Main Parts- ~ 20 and Parts List ---------------------- 44
IMain Adjustment ------------------------------------ 26 @Exploded View of Mechanism Assembly

@.Wiring connections ................................. 29 and Parts List ...................... 46
.Block diagram ....................................... 30 E . Illustration of Packing and Parts List ......... 4g
ELStandard Schematic Diagram ------------------- 33

No. 49414

January 1997

Page 21

I Mechanism section

0 Removing the head relay PCB

1. Desolder the lead wires of the loading motor at the 2
positions shown (red, black). (Fig. 2-8)

2, Desolder the lead wires of the head at the 3 positions
shown (red, yellow, black). (Fig. 2-8)

3. Remove the three screws (D securing the head relay
PCB. (Fig. 2-8)

4. Shift the interlocking section ® securing the head relay
PCB in the direction shown by the arrow A to remove the
PCB. (Fig. 2-8)

9 Removing the load arm assembly

1. Using tweezers, detach the Mylar washer ® securing the
load arm assembly and pull out the load arm assembly.
(Fig. 2- 9)

Note: When reassembling, be sure to use a new Mylar
washer.

2, Shift the load arm assembly counterclockwise. (Fig. 2- 9)

3. Remove the load arm assembly from the catch (K).

(Fig, 2- 9)

Q Removing the cassette holder and holder arm

assembly

1. Remove the head relay PCB.

2. Remove the load arm assembly.

3. Apply DC 6 V to the lead wire of the loading motor
assembly and turn the load gear assembly to the position
shown in Fig. 2-10.

4. Remove the screw ® securing the cassette holder and
holder arm assembly. (Fig, 2-10)

5. Shift the cassette holder and the holder arm assembly in
the direction shown by the arrow B and remove them from
the interlocking section © of the sub chassis assembly.
(Fig. 2-10)

9 Removing the sub chassis assembly
Remove the head relay PCB.
Remove the load arm assembly.
Remove the cassette holder and holder arm assembly.

PFJNT

Remove the two screws (3 and @ securing the sub
chassis assembly. (Fig. 2- 10)
Note: When removing the sub chassis assembly, the mode
gear may become detached. ln this case, set it back
to the original position.

Loard arm assembly

Cassette holder

Sub

KS - RT424 C/J

Head relay board

assembly

Loard gear assembly

Loarding motor assembly

Apply DC 6V

Fig.2-10

(No. 49414) 21

Page 54

KS - RT424 C/J

BLOCK NO. [I] MIII I

A R131? IAR'IS NO. PARTS NAME REMARKS QTY SUFFIX (SLR
73 1-0522-40088 CATCH SP6 1
7A 1-0522-40103 REEL DRIVER SP6 2
75 1-0522-40118 DASH SPG 1
76 1-0522-40163 HOLD SPG 1
77 1-0522-40143 HOLDER ARM SP6 1
79 1~0522-4017S TU ARM SP6 2
80 1-0522-40155 FR ARM SP6 1
83 1-0052-50225 BELT 1
87 1-0522-70028 REEL PWB 1
88 1-0522-70038 2CH HEAD F-7742-HG 1
89 1-0522-70048 HEAD WIREUU 1
9O 1-0522-70055 HEAD WIRE(B) 1
91 1-0522-70065 HEAD WIRE 1
92 1-0052-7082-05 SUB MOTOR WIRE RED 1
93 1-0052-7082-28 SUB MOTOR WIRE BLACK 1
94 1-0522-70105 LEAF SW MLS-2 1
9S 1-0522-70115 LEAF SW MLS-4 1
96 1~0522-7013S MOTOR WIRE RED 1
97 1-0522-70148 MOTOR WIRE BLACK 1
98 1-0522~7018S SUB MOTOR PPNl3EBlOC 1
99 1-0522-70223 HEAD PWBUV) 1
100 1-0522-70248 CONNECTOR 10F TKC-FlOX-Kl 1
102 X-0052-70403 PHOTO COUPLER 1
103 1-0036-7007-13 SLIDE SW SLD-32-7105 1
105 1-0056-70115 SW SW-llZ-S 1
107 1-0052-70135 JOINT WIRE (7P) 1
110 1*0522-50038 AZIMUTH SCREW 3
111 1-0052-50235 +MOTOR SCREW M2X2.5 2

i 112 1-0101-50065 +SCREW PLAIN M1.7X7 2
116 1-0522~50058 SPECIAL SCREW(2 2
117 2-1032-0022-C25 +MACHINE SCREW M2X2.2 2
119 1-0522-50068 SPECIAL SCREW(3 2
120 2-1332-0030-Cls +SCREW PLAIN#3S M2X3 6
121 2-1382-0050-C25 +PLAIN B-TYPEII3 MZXS 1
128 2*1812-0030-028 POLY WASHER(S) 1.2X3XO.25 6
129 2*1816-0032-D28 POLV WASHER(S) 1.6X3.2X0.25 7

130 2-1816-0032-525 PSW-S 1.6X3.2XO.5 1
131 2-1821-0032-015 PSW 2.1X3.2XO.25 2
132 2-18210040-D15 POLY WASHER 2.1X4XO.25 2
137 1-OOS3~SOOSS LMW-S 1.5X3.2XO.25 2
138 2-1711-5040-165 E RING 1.5 1

48 (No. 49414)