Sony MZ-S1 Service Manual page 25

LASER POWER CHECK
• Connection
Optical pick-up
objective lens
MAIN board
TP (+)
TP (–)
• Checking Method
1. Select the manual mode of test mode (see page 16), and set
the laser power adjusting mode (item number 010).
Set LCD display
010
Laser
2. Press the key continuously until the optical pick-up
.
moves to the most inward track.
3. Open the cover and set the laser power meter on the objective
lens of the optical pick-up.
4. Press the key, and set the laser MO read adjustment
N >
mode (item number 011).
Set LCD display
011
###S**
### : Address
** : Adjusted value
5. Check that the laser power meter reading is 0.81 ± 0.08 mW.
6. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 44 mV.
7. Press the N > key, and set the laser CD read adjustment
mode (item number 012).
Set LCD display
012
###S**
### : Address
** : Adjusted value
8. Check that the laser power meter reading is 0.97 ± 0.10 mW.
9. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 44 mV.
10. Press the key, and set the laser MO write adjustment
N >
mode (item number 013).
Set LCD display
013
###S**
### : Address
** : Adjusted value
laser
power meter
digital voltmeter
11. Check that the laser power meter reading is 4.95 ± 0.50 mW.
12. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 80 mV.
13. Press the key to quit the manual mode, and activate the
x
test mode (display check mode).
Checking and Connection Location: MAIN board (See page 26)
MZ-S1
25