Sony MZ-NHF800 Service Manual page 18

MZ-NH700/NHF800
Ver 1.1
3-4-3. VBsAdj adjustments
Procedure:
1. In the "3-4-2. PwrAdj Adjustments" completed status, press
the key to display as follows.
>
Display
240
VBsAdj
2. Apply the voltage of 5 V to the CL453 (VBUS 5V) and CL460
(VBUS GND).
3. Press the 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 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
241 AD **
2241
242 AD **
2242 2.05 V + 0.02 V
3.30 V ± 0.01 V
243 AD **
2243
Note1: "**" is adjustment value (hexadecimal number).
Note2: Ground point of all adjustment points is CL433.
Note3: Refer to page 18 for adjustment location.
Table 3-4-2. VBsAdj Specifications
7. Press the 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 1.80 V (− 0.02 V).
9. Press the key to write the adjusted value.
X
10. Apply the voltage of 1.2 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.
18
3-5. Charge Function Check
Note: When perform this check, don't apply a voltage to battery terminals.
Procedure:
1. Connect the digital voltmeter to CL431 (BATT+) and CL433
2. Enter the test mode using the AC adapter.
3. Press the [VOL+] key to enter the Manual mode.
4. Press the [VOL+] key twice to display as follows.
5. Press the
Measuring point
CL8001
CL8027
CL8055
6. Adjust with [VOL+]/[VOL--] keys so that the value of digital
7. Press the
8. Press the
9. Disconnect the digital voltmeter.
10. Press the
11. Press the
12. Press the
13. Press the
14. Disconnect the power supply (AC adaptor).
15. Connect the resistor of the specified value (see table below) to
16. Select item number 2264 through the operation similar to steps
17. Press the
18. In the same manner, exchange the resistors with the power
Note: Be sure to disconnect the AC adapter when exchanging the resistors.
Item No.
2262
2263
2264
2265
2266
2267
(GND).
Display
2
POWER
key once, press the [VOL+] key once, press the
>
key once, press the [VOL+] key three times, and press the
>
key once to display as follows.
>
Display
261
AD **
adjustment value (hexadecimal)
voltmeter becomes 1.80 V.
key to write the adjusted value.
X
key to select the next item.
>
key to select the next item (2262) and display
>
"262 AD CC".
key and confirm that the adjustment value changes
X
from "CC" to "DD".
If it changes to "BB", IC401 (for charge IC) is fault.
key to select the next item (2263) and display
>
"263 AD CC".
key and confirm that the adjustment value changes
X
from "CC" to "DD".
If it changes to "BB", IC401 (for charge IC) is fault.
the battery terminals (CL431: BATT+, CL432: BATT−), and
then connect the AC adapter again, and enter the test mode.
2 to 8.
key and confirm that the adjustment value changes
X
from "CC" to "DD".
If it changes to "BB", IC401 (for charge IC) is fault.
supply disconnected, and confirm that the adjustment value is
"CC" in each item number.
Doing so with the power supply connected causes a trouble.
Display
262 AD ** No resistor
263 AD ** No resistor
22 Ω (0.1 watts or more)
264 AD **
10 Ω (1.0 watts or more)
265 AD **
10 Ω (1.0 watts or more)
266 AD **
2.2 Ω (1.5 watts or more)
267 AD **
Table 3-5-1. Charge Adjustment Specifications
Connecting Resistor