KENWOOD VR4090B
Instrukcja Serwisowa

VR-4080-B/4090-B/4700/4900
DISASSEMBLY FOR REPAIR
HOW TO REMOVE THE FRONT PANEL AND THE MOTOR.
1. Take out the connectors (1) {X07,CN1/X13(CN7,CN8)} and the AC connetor(2). 2. Take the lead (3) out of CN301 on X11(A/4) PCB. 3. Take out the screws (4) and (5). 4. The front panel can be separated by removing 2 hooks (6) on the sub panel. 5. To separate the motor from the front panel, remove the screws (7).

MOTOR

2
AC CONNECTOR X07,CN1

1

1 1

7 x5 4 4 x5

X13
(G/8)

X25

CN8

CN7

H/P PCB

3
X11
(A/4)

CN301

6 x2 HOOK 5 x5 5

HOW TO REPLACE THE POWER TRANSISTOR.
1. The rear panel can be separated by removing screws (1) on the rear panel. 2. Take the AC connector out of CN2 on the X07(C/7). 3. To separate the chassis from bottom chassis, remove the screws (2). 4. Remove CN21 and screws (3) on X13(C/5). 5. Remove screws (4 to 7). 6. The fan motor can be separated by removing screws (8) and the connector (CN12) on X07 PCB. 7. Take the PCB X25(B/9), X11(C/4)} out of X07. 8. To separate the main PCB (X07) from the bottom chassis, remove screws (0). 9. Set up the PCB as figure (-). 10. Replace the defective transistors.
7 7 x2 7 6 6 8 x9
(C/5)

5

(C/9)

X25

X05-5130-11

4

X13

CN21

3 x2

3 x2

9
X07 CN12

2 2 2 2
2

2

2

X07-3150-10
(A/5)

11 10 10 10
CN2 CN14

10 10

X07

(C/7)

CN6

(B/9)

X25

X11
(C/4)

10 x3

1 x70

5