PS212W Testing Flow Chart
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Start
Dc voltage check
±Vcc,±15V
OK
Check transformer
C
168,
C
169
,D
123
,
D
124,
C
170
Power on check
LED red &green
OK
Check vol module
& connector
cable& ±15V.etc
Check THD output
power, noise
OK
Check pre board
& power board ,
±Vcc,±15V etc
Test frequency
Response
OK
Check U
102
,uR
133
,
C
121,
R
135
,C
122
.etc
Test input sensitivity
OK
Check U
101
,R
117,
R
112,
R
114
etc
Test protection
OK
Check U
107
.R
237
±15Vcc etc
Test limiter circuit
OK
Check U
106
.Q
107
etc
Auto off Function
Hi pot test
OK
Check U
103
.Q
101.
Q
102
.C
131.
R
142
;Ac
cord, Transformer.
OK
Listening test
OK
The Amp ass’y ok
END
Test frequency
Response
Check U105
C137C137CC143etc
PS212W
subwoofer
13
Summary of Contents for PS212W
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Page 44: ...Green Red D401 LED_5DIA PS212W subwoofer 43...
Page 46: ...VDD U105 C VEE U105 D 6 5 7 U105 B TL072 2 3 1 TL072 U105 A PS212W subwoofer 45...
Page 49: ...L01 56R 2 1 PS212W subwoofer 48...
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