JVC UXP55/EU
Manual de Servicio

2.1.7 Removing the power amplifier board / power amplifier sub board / main board / heat sink (See Fig.13 ~ 21) � Prior to performing the following procedure, remove the metal cover, the rear cover, the CD-R mechanism assembly and the rear panel. (1) Disconnect the card wire from connector CN900, CN901, CN933 and CN931 on the main board respectively. (2) Disconnect the wire from connector CN949, CN950 and CN951 on the power supply board. (3) Remove the two screws I on the right side of the body. (4) Move the boards and heat sink assembly upwards and disengage the joint d and the two joints e to release the power amplifier board and the main board from the chassis (Refer toFig.15 , 16). Move the rear part of the board and heat sink assembly to the right side. CAUTION: The wire extending from the lower side of the main board is still connected with the body (Refer to Fig.17). (5) Disconnect the wire from connector CN906 on the lower side of the main board (Refer to Fig.18). 2.1.8 Removing the power amplifier board (See Fig.19 ~ 21) (1) Disconnect the power amplifier board from connector CN941 on the power amplifier sub board. 2.1.9 Removing the power amplifier sub board (See Fig.19 ~ 21) (1) Disconnect the two wires from connector CN944, CN945, CN946 and CN947 on the power amplifier sub board. (2) Remove the two screws J attaching the power amplifier sub board and the heat sink. 2.1.10 Removing the main board (See Fig.19 ~ 21) (1) Disconnect the wires from connector CN944, CN945, CN946 and CN947 on the power amplifier sub board. (2) Remove the two screws K attaching the main board and the heat sink. REFERENCE: The power amplifier board, the power amplifier sub board, the main board and the heat sink can be remove drespectively.

Power supply board CN949

Main board CN900 CN933 CN901

CN950

CN951

CN931

Front panel assembly Fig.14

Main board

Front panel assembly

I

Joint e
Fig.15

I
Heat sink

Front panel assembly CN901 CN900 CN931 CN933 Main board

Power amplifier board Power supply board Fig.13 CN949 / CN950 / CN951 Chassis Fig.16

Joint d

1-10 (No.22036)