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34
DC Offset Voltage Adjustment
Adjustment Procedure
Set the power voltage to rated voltage for this adjustment.
(1) Before turning on the power, Insert Digital Voltage Meter between the SPEAKERS SYSTEM A (L CH) "+" and "-".
Insert Digital Voltage Meter between the SPEAKERS SYSTEM A (R CH) "+" and "-".
(2) Adjust the VOLUME to MIN.
(3) Turn on the power. Then turn the SPAKERS SW to A.
Adjustment is started immediately after a speaker relay turns on.
(4) First L CH is adjusted.
The variable resistor R639 on P101 is turned with adjustment driver, and the Digital Voltage Meter is adjusted to "0
mV ± 3 mV".
(5) Then, R CH is adjusted.
The variable resistor R640 on P101 is turned with adjustment driver, and the Digital Voltage Meter is adjusted to "0
mV ± 3 mV".
NOTE
: DC offset voltage drops when turn the semi-fixed resistor (R639 and R640) clockwise. DC offset voltage rises
when turn the semi-fixed resistor un-clockwise. Please turn it slowly, because value of Digital Voltage Meter
changes slowly.
(6) Although after-adjustment DC offset voltage has some change, Please check that the range of DC offset voltage
between L ch (R ch) "+" and L ch (R ch) "-" terminal of SPEAKERS SYSTEM A is "0 mV ± 20 mV". CHART OF
FACTORY MODE.
Digital Voltmeter
Digital Voltmeter
R ch
V
L ch
V
P101
R639
R640
Содержание PM-KI-PEARL-LITE
Страница 17: ...17 6 Double click the TM86FH47pass folder 7 Double click FlashProg exe ...
Страница 18: ...18 8 Click Device tab 9 Click Apply ...
Страница 19: ...19 10 TMP86FH47 appear in Chosen Device 11 Click Object File and click Browse ...
Страница 22: ...22 16 The Flash Programmer is launched Click setup icon 17 Click Browse ...
Страница 23: ...23 18 Choose FlashProg ini in TM86FH47pass folder and click Open 19 Click OK PM7004 ...
Страница 28: ...28 23 Auto Programming opens ...
Страница 30: ...30 25 Writing data is written into the microprocessor U101 26 Click Yes when writing is successful ...
Страница 31: ...31 27 Click Cancel 28 Click Cancel ...
Страница 39: ...39 MAIN FOIL SIDE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 J I H G F E D C B A ...
Страница 47: ...47 L ch SIGNAL LINE R ch SIGNAL LINE for PM7004 8 7 6 5 4 3 2 1 A B C D E F SCHEMATIC DIAGRAMS 2 6 ...
Страница 52: ...WIRING DIAGRAM 52 ...
Страница 58: ...58 LC78212 Q391 Continued from preceding page No 4817 4 6 LC78211 78212 78213 ...