Sony Glasstron Lite PLM-A35E Service Manual page 23

POWER SUPPLY BLOCK
[Battery Down Adjustment]
Preparation:
[VOL]
• control (RV201)
[AVLS]
• switch (S201)
[BRIGHT]
• control (RV301): Center (click position)
Condition:
VIDEO IN: Color bar
Signal AUDIO IN L: 1 kHz, –20 dBs
AUDIO IN R: 1 kHz, –20 dBs
Measurement point
Displayed data on adj. remote commander
Measuring equipment
Adjustment page D
Adjustment address 04, 05, 06, 07, 08, 09
Specified value ZZh = 60h ± 0Ah
Connection:
Referring to Fig. 3-5, connect the following equipment.
(1) Connect the regulated power supply and a digital voltmeter
to the battery terminal.
(2) Connect the adjusting remote commander to the CN305 on
YM-A01 board.
(3) Connect a pattern generator to the VIDEO IN terminal.
(4) Connect an audio SG to the AUDIO IN terminal.
Adjustment Procedure:
(1) Adjust the output voltage of regulated power supply so that
the battery terminal voltage is 6.07 ± 0.02 Vdc.
(2) Turn ON the POWER switch on the set.
(3) Set data: 01 to page: 2, address: 00.
(4) Read data: ZZh on page: 2, address: 2B.
(5) Confirm that the data: ZZh satisfies the specification value.
(6) Set data: 01 to page: 1, address: 00.
(Cancel D page protect)
(7) Using the following formulas (calculation of hexadecimal
numbers), calculate the adjustment data and enter them to
respective adjustment addresses.
(Refer to 5. Data Processing on page 3-3)
Address: 08
Address: 07
Address: 06
Address: 05
Address: 04
Address: 09
Note: After setting each data, be sure to press the PAUSE button on the
adjusting remote commander.
(8) Set data: 00 to page: 2, address: 00.
(9) Set data: 00 to page: 1, address: 00.
(D page protect)
: Maximum
: OFF
D = ZZh
08
D = ZZh + 07h
07
D = ZZh + 15h
06
D = ZZh + 18h
05
D = ZZh + 1Dh
04
D = 08h
09
Pattern
generator
A/V IN jack (J402)
Audio
YM-A01 board
SG
+
–
Regulated
power supply
Battery terminal
Digital voltmeter
+
–
3-13
Connector for check (CN305)
YM-A01 board
Adjusting
Remote
Commander
Set
Extension cable
(J-6082-291-A)
Fig. 3-5
Confidential
PLM-A35E (AEP)