Sony DNW-A100 Maintenance Manual page 30

1-10. Switch and Shorting Plug Setting 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
DM-89 board switch
Switch No. 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 adjustment switch
2 —————
3 —————
4 —————
1-18
B C D DM-89 E
OFF ON
S501
S302 *S303
TEST NOR TEST NOR
S101
TEST NOR
DM-89 Board (A Side)
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
RF adjustment use
OFF (OPEN): Normal mode
ON (CLOSE): Adjustment and test modes
Factory use
Factory use
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)
OFF (OPEN)
ON (CLOSE)
n
Refer to "2-13. Pulling Out/
Insertion of Plug-in Board" for
pulling out and insertion of board.
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DNW-A100/A50/A45
DNW-A100P/A50P/A45P