Sony PLM-A55E Service Manual page 24

[Battery Down Adjustment]
Mode Video/audio signals are output
VIDEO IN: Color bar
Signal AUDIO IN L: 1kHz, – 20 dBs
AUDIO IN R: 1kHz, – 20 dBs
Measurement point
Displayed data on adj. remote commander
Measuring equipment
Adjustment page D
Adjustment address 08, 09, 0A, 0B, 0C, 0D, 42, 43, 44, 45, 46
Specification value ZZh = 5Fh ± 05h
Connection:
Referring to Fig. 3-4, 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 CN902 on
YM-11P board.
(3) Connect a pattern generator to the VIDEO IN terminal.
(4) Connect an audio oscillator and attenuator to the AUDIO IN
terminal.
Menu Setting:
(Picture and tone quality setting) (see page 22)
Adjustment Procedure:
(1) Adjust the output voltage of regulated power supply so that
the battery terminal voltage is 7.2 Vdc.
(2) Turn ON the POWER switch on the set.
(3) Operate the jog dial on the set so that the video and audio
signals are output. (EXT. VIDEO AUDIO mode)
(See page 22)
(4) Set data: 01 to page: 1, address: 00.
(Cancel D page protect)
(5) Set data: 01 to page: 2, address: 00.
(6) Adjust the output voltage of regulated power supply so that
the battery terminal voltage is 5.77 ± 0.02 Vdc.
(7) Read data (ZZh) on page: 2, address: 27.
(8) Confirm that the data (ZZh) satisfies the specification value.
(9) Using the following formulas (calculation of hexadecimal num-
bers), calculate the adjustment data and enter them to respec-
tive adjustment addresses.
(Refer to 5. Data Processing on page 21)
Address: 08 D
Address: 09 D
Address: 0A D
Address: 0B D
Address: 0C D
Address: 42 D
Address: 43 D
Address: 44 D
Address: 45 D
Address: 46 D
Note: After setting each data, be sure to press the PAUSE button on the
adjusting remote commander.
(10) Set data: 10 to page: D, address: 0D, and press the PAUSE
button on the adjusting remote commander.
(11) Set data: 10 to page: D, address: 47, and press the PAUSE
button on the adjusting remote commander.
(12) Set data: 00 to page: 2, address: 00.
(13) Set data: 00 to page: 1, address: 00.
= ZZh + 25h
08
= ZZh + 20h
09
= ZZh + 19h
0A
= ZZh + 0Ch
0B
= ZZh
0C
= ZZh + 1Ch
42
= ZZh + 10h
43
= ZZh + 0Bh
44
= ZZh + 05h
45
= ZZh – 02h
46
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