Sony ZS-M7 Service Manual page 36

CD SECTION
1. Enter the CD Test mode
(see page 30)
MD EF TG FB
88 07 00 3A0
The above is the default display.
Pressing the ^ key will rotate the CD and pressing the ^
once more will output sounds.
Pressing the ^ key will execute automatic adjustment and
values will change; however, this value is quite normal.
2. RF LEVEL and jitter check
Test mode PLAY status
Connection Point:
Main board
TP(RFO)
TP(VC)
Check to see that the jitter is less than 9.0 nsec.
and RF level is between 1.1 – 1.5Vp-p.
VOLT/DIV : 200mV (using 10:1 probe)
TIME/DIV : 500ns
Oscilloscope
RF level:
1.1 - 1.5Vp-p
– 36 –
3. Traverse signal check
Connection Point:
Main board
CN701 $∞ pin (TEO)
TP(VC)
Press the FF or FR from 2.
Check to see that the traverse signal level is between 400
600mVp-p.
0V
4. After completed with adjustment, press the RESET button to
release the test mode.
Adjustment Location :
[MAIN BOARD] (SIDE A)
IC701 $∞ pin
(TEO)
Oscilloscope
Note:
Extend the sweep time
for easier view.
A
400 – 600mVp-p
0V
B
A = B
TP TP
(RFO) (VC)
A
B