Sony DNW-A75 Maintenance Manual page 30

1-10. Switch and Shorting Plug Settings on PC Boards
1-10-3. DM-89 Board
n
Never change the settings of the factory use switches.
A
ON
S901
OFF
S301
TEST NOR
Switches
Ref. No. Bit Name
S101 Y-RF LPF & EQ TEST
(Y-RF low-pass filter &
equalizer test)
S102 —————
S301 C-RF LPF & EQ TEST
(C-RF low-pass filter &
equalizer test)
S302 —————
S501 —————
S901 1 RF ADJUSTING
2 —————
|
4
1-20
B C D DM-89 E
OFF ON
S501
S302
TEST NOR
S101
TEST NOR
DM-89 Board (Side A)
Description
The Y-RF low-pass filter & equalizer test
signal connection switch
To adjust: Select the TEST position.
Connect the input signal to
TP103. (GND to E102)
Factory use
The C-RF low-pass filter & equalizer test
signal connection switch
To adjust: Select the TEST position.
Connect the input signal to
TP303. (GND to E302)
Factory use
Factory use
Selection whether to adjust the RF or not.
OFF (OPEN) : Normal mode
ON (CLOSE) : Test (adjustment) mode
Factory use
F G
A No. LOTNO, S NO,
1
2
3
4
5
S102
TEST NOR
6
7
Factory setting
NORMAL POSITION
NORMAL POSITION
NORMAL POSITION
NORMAL POSITION
ON
OFF (OPEN)
OFF (OPEN)
n
Refer to Section 2-13 for remov-
ing/reattaching the plug-in board.
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DNW-A75/A75P