Noblex NXC1039BT Service Manual

PLL SYNTHESIZER STEREO RADIO WITH

COMPACT DISC PLAYER DIGITAL

MODEL NO :NXC1039BT

NOBLEX

CONTENTS

Page

Disassembly Instructions ......................................................................................................................................3

Disassembly Diagram ...........................................................................................................................................4

Operation Check ...................................................................................................................................................5

Pr i n t e d C i r c u i t B o a r d s .......................................................................................................................................................................................................................................... ...6

Schematic Diagram (Main board)..............................................................................................................................................................................................................9

Sc h e m a t i c D i a g r a m ( K e y b o a r d ) ................................................................................................................................................................................................................11

Electrical Parts List ........................................................................................................................................... .12

Specifications ..................................................................................................................................................... .20

DISASSEMBLY INSTRUCTIONS

1. Using the unlock key that came with the unit or a similar tool, unlock the Mounting Box and remove toward the

rear of the unit.

2. Remove two screws (A) located on the rear of the top cabinet then remove the Top Cabinet.

3. Remove two screws (B) located on the rear of the bottom cabinet then remove the Bottom Cabinet.

4. Take out the Front Panel and the Ring. Remove the screw (C) from on the front side of the Base.

5. Remove two screws (D) and the two screws (E) then remove the deck with the deck brackets from the

Rear-right Cabinet and the heat sink.

6. Remove two screws (G) from under the deck front bracket then remove the Deck Front Bracket.

Remove two screws (H) from under the deck rear bracket then remove the Deck Rear Bracket.

7. Remove two screws (I) from on the left side of the heat sink then remove the Power IC Bracket.

8. Remove two screws (J) from on the left side of the heat sink.

9. Remove two screws (O) from on the rear of the Rear-right Cabinet then remove IC Bracket.

Remote the two screws (L) then to remove the RCA jacks.

10. Remove two screws (M) from each side of the base then remove the Base.

11. Remove the screws (N) from under the main board then remove the Heat Sink, Rear-right Cabinet and

the Main Board.

12. Remove the screw (K) to remove the little hardware.

13. Remove the screw (P) from on the back of the Rear-right then remove antenna Socket.

14. Remove the screw (Q) from right side of the Rear-right bracket then remove the Hexagon Nut.

OPERATION CHECK

GENERAL SPECIFICATIONS OF SIGNAL

Standard frequency FM 98.1 MHz (87.5, 108.0 MHz)

MW 1000 kHz (522, 1620 kHz)

Signal output FM 60 dBμV

MW 74 dBμV

Modulation MW 1 kHz 30% MOD.

FM Stereo 1 kHz 75 kHz DEV.

45% for L only or R

only pilot level 10%.

AF output level

Power source voltage

AF load impedance

Balance

Tone

The signal strength read

FM/MW

DC 14.4V (Backup voltage is the same as this)

4 ohm pure resistance

Center position of level

Center position.

in this section is voltage on the antenna.