Sony Walkman MZ-RH1 - Electrical Adjustment Procedures; Power Supply Voltage Adjustments (VBsAdj); VBsAdj Adjustment Specifications

17
MZ-RH1
Item No. Display Specification value Measuring point
2211 VC1 ** 2.05V + 0.02V TP8065
2212 VC1H N ** 2.25V ± 0.01V TP8065
2213 VC2L ** 1.50V + 0.01V CL8001
2214 VC2H ** 1.50V + 0.01V CL8001
2217 REG1 L ** 3.02V ± 0.02V CL954
2218 REG1 H ** 3.02V ± 0.02V CL954
2219 REG2 1 ** 2.275V ± 0.01V CL951
2221 REG2 2 ** 2.480V ± 0.01V CL951
2222 REG2 3 ** 2.740V ± 0.01V CL951
2223 REG2 4 ** 2.985V ± 0.01V CL951
2224 REG3 ** 2.52V ± 0.02V CL947
2225 VREC 1 ** 0.75V ± 0.02V CL601
2226 VREC 2 ** 0.80V ± 0.02V CL601
2227 VREC 3 ** 1.52V ± 0.02V CL601
2228 VREC 4 ** 2.17V ± 0.02V CL512
2229 VREC 5 ** 2.78V ± 0.02V CL512
2231 VREC 6 ** 0.75V ± 0.02V CL601
2232 VREC 7 ** 0.90V ± 0.02V CL601
2233 VREC 8 ** 2.10V ± 0.02V CL601
2234 VREC 9 ** 2.70V ± 0.02V CL601
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
3-2-3. VBsAdj adjustments
Procedure:
1. In the “3-2-2. PwrAdj Adjustments” completed status, display
as follows.
2. Apply the voltage of 5 V to CL441 (VBUS 5V) and CL445
(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 3-2-
2. VBsAdj Specifications”)
5. Press the X key to write the adjusted value.
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 key three times and back to the Display Check
mode.
CL441
CL445
CL601
TP8065
CL8001
CL512
CL947
CL965
CL954
CL964
CL951
W402
W401
– MAIN Board (Conductor Side) –
SL802
Adjustment Location:
2240 VBsAdj