Sony MZ-NH1 Service Manual page 18

MZ-NH1
3-4-3. VBsAdj adjustments
Procedure:
1. In the "3-4-2. PwrAdj Adjustments" completed status, press
the [FF] key to display as follows.
Display of the remote commander
VBsAdj
2. Apply the voltage of 5 V to the CL453 (VBUS 5V) and CL460
(VBUS GND).
3. Press the [FF] key to change the item number to 2241.
4. Adjust with [VOL+]/[VOL--] keys so that the value of digital
voltmeter becomes specification value. (refer to "table 3-4-2.
VBsAdj Specifications")
5. Press the key to write the adjusted value.
X
6. Press the [FF] key to select the next item, and repeat
adjustments to item number 2243 at the same manner as step
3 to step 5.
Item No. Display Specification value
1.13 V ± 0.01 V
2241 241 REG4 **
2242 242 REG5 ** 2.05 V + 0.02 V
3.30 V ± 0.01 V
2243 243 REG6 **
Note1: "**" is adjustment value (hexadecimal number).
Note2: Ground point of all adjustment points is CL433.
Note3: Refer to page 17 for adjustment location.
Table 3-4-2. VBsAdj Specifications
7. Press the [FF] key to select the item number 2244, and turn off
the power supply of battery terminal.
8. Adjust with [VOL+]/[VOL--] keys so that the voltage of between
CL935 and CL433 (GND) becomes 4.10 V (− 0.02 V).
9. Press the key to write the adjusted value.
X
10. Apply the voltage of 3.7 V to the battery terminal again.
11. Press the key to display "240 VBsAdj" (Item number:
x
2240).
12. Turn off the voltage of 5 V to the CL453 (VBUS 5V) and
CL460 (VBUS GND).
13. Press the key three times and back to the Display Check
x
mode.
3-5. Charge Function Check
Note1: When perform this check, don't apply a voltage to battery terminals.
Note2: Be sure to disconnect the AC adapter when connecting the resistors.
Doing so with the power supply connected causes a trouble.
Procedure:
1. Connect the 10 ohms resistor (more than 3 watts) to battery
terminals.
2. Connect the AC adapter to the battery charging stand in
accessories and set the main unit.
3. Enter the test mode (Display Check mode).
4. Press the [VOL+] key once to enter the Manual mode.
5. Press the [VOL+] key twice, press the [FF] key once, press the
[VOL+] key once, press the [FF] key once, press the [VOL+]
key twice to display as follows.
Display of the remote commander
ChrgLi
18
240
Measuring point
CL603
CL8003
CL8007
250
6. And [FF] key once again to select the item number 2251 and
display "251 ChgChk **" on the LCD of remote commander.
7. Press the key confirm that "ChgCOK" is displayed.
X
8. Press the key four times and back to the Display Check
x
mode.
9. Cut the power supply and remove the resistor that connected
to the battery terminals.
3-6. Laser Power Check
Procedure:
1. In the test mode (Display Check mode), press the [VOL+] key
to enter the Manual mode.
2. Open the lid and press the [FR] key continuously until the
optical pick-up moves to the most inward track.
3. Set the laser power meter so that the laser beam from the optical
pick-up aims at the objective lens of laser power meter at right
angle.
4. Press the [VOL--] key once to display as follows.
Display of the remote commander
DESIGN
5. Press the [FF] key three times to select the item number 9111
and display as follows.
Display of the remote commander
LrefPw **
6. Confirm that the value of laser power meter is 0.67 mW ±
21%.
7. Press the [FF] key to select the item number 9112.
8. Confirm that the value of laser power meter is 0.76 mW ±
18%.
9. Press the [FF] key to select the item number 9113.
10. Confirm that the value of laser power meter is 6.25 mW ±
12%.
11. Press the key four times and back to the Display Check
x
mode.
009
111