Sony Walkman MZ-RH1 Service Manual page 17

Item No. Display Specification value
2211 VC1 ** 2.05V + 0.02V
2212 VC1H N ** 2.25V 0.01V
2213 VC2L ** 1.50V + 0.01V
2214 VC2H ** 1.50V + 0.01V
2217 REG1 L ** 3.02V 0.02V
2218 REG1 H ** 3.02V 0.02V
2219 REG2 1 ** 2.275V 0.01V
2221 REG2 2 ** 2.480V 0.01V
2222 REG2 3 ** 2.740V 0.01V
2223 REG2 4 ** 2.985V 0.01V
2224 REG3 ** 2.52V 0.02V
2225 VREC 1 ** 0.75V 0.02V
2226 VREC 2 ** 0.80V 0.02V
2227 VREC 3 ** 1.52V 0.02V
2228 VREC 4 ** 2.17V 0.02V
2229 VREC 5 ** 2.78V 0.02V
2231 VREC 6 ** 0.75V 0.02V
2232 VREC 7 ** 0.90V 0.02V
2233 VREC 8 ** 2.10V 0.02V
2234 VREC 9 ** 2.70V 0.02V
Note1: "**" is adjustment value (hexadecimal number).
Note2: Ground point of all measuring points is CL965.
Note3: Item number 2228, 2229 are adjusted with the mechanism deck
connected.
Table 3-2-1. PwrAdj Specifications
Adjustment Location:
– MAIN Board (Conductor Side) –
CL601
SL802
CL512
Measuring point
TP8065
TP8065
CL8001
CL8001
CL954
CL954
CL951
CL951
CL951
CL951
CL947
CL601
CL601
CL601
CL512
CL512
CL601
CL601
CL601
CL601
CL8001
TP8065
CL964
CL947
CL951
CL954
CL965
3-2-3. VBsAdj adjustments
Procedure:
1. In the "3-2-2. PwrAdj Adjustments" completed status, display
as follows.
2240
2. Apply the voltage of 5 V to CL441 (VBUS 5V) and CL445
(VBUS GND).
3. Press the
>
4. Adjust with [VOL+]/[VOL--] keys so that the value of digital
voltmeter becomes specification value. (Refer to "table 3-2-
2. VBsAdj Specifications")
5. Press the key to write the adjusted value.
X
6. Repeat adjustments to item number 2242 at the same manner
as step 4 to step 5.
7. Select the item number 2244, and turn off the power supply of
applying to W401 (BATT+) and W402 (BATT–).
8. Repeat adjustments to item number 2244, 2245 and 2246 at
the same manner as step 4 to step 5.
9. Apply the voltage of 3.7 V to W401 (BATT+) and W402
(BATT–) again.
10. Turn off the voltage of 5 V to CL441 (VBUS 5V) and CL445
(VBUS GND).
11. Press the
x
mode.
CL445
CL441
W402
W401
VBsAdj
key to change the item number to 2241.
key three times and back to the Display Check
MZ-RH1
17