ICF-CD73W - Sony Audio Service Manual (repair manual). Page 13

CD-JUMP  TEST  MODE
Procedure:
1.  Connect the oscilloscope to TP (TE) and TP (VC) on the CD 

board.

 

Connecting Location: CD board (See page 15)

2.  Connect 47 kW and 100 kW resistors in parallel to the end of 

S501 on the LCD board, and further connect 100 kW and 220 
kW resistors respectively and short them to the GND, and the 
CD-JUMP TEST MODE will be activated.

3.  Insert a CD disc.
4.  Turn the power on.  Press the [CD 

u

] button.

5 .  If the [MODE] button is pressed, you can jump in fast feed or 

fast reverse direction with the [+ 

>

] or [– 

.

].button by the 

jump amount set in Table 1.

LCD

Button

+ 

>

– 

.

REP ALL

TRACK + 1

TRACK - 1

SHUFFLE

TRACK + 10

TRACK - 10

SHUFFLE, REP

TRACK + 100

TRACK - 100

Waveform of TP (TE) and TP (VC) output in each mode is as fol-
lows.

REP ALL mode
500 μs/div

SHUFFLE mode
1 ms/div

SHUFFLE REP mode
10 ms/div

6.  Turn the power off to release the CD-JUMP TEST MODE.