Troubleshooting Flow Chart - Infinity Model Twelve Service Manual

M o d e l T w e l v e
Start
Dc voltage check
±Vcc,±15V
OK
yes
Power on check
LED red &green
OK
yes
Test frequency
Response
OK
yes
Test phase sw,low
pass sw rabos vr
OK
yes
Test input sensitivity
OK
MODEL12 Test Flow Chart
no
Check transformer
C C ,D ,
168, 169 123
D C
124, 170
Check vol module
no
& connector
cable& ±15V.etc
no
Check U ,uR
102 133
C R ,C .ect
121, 135 122
no
Check sw103,102,
R158,163,177 ect
no
Check U ,R
101 117,
R R etc
112, 114
Test protection
OK
Test limiter circuit
OK
Check THD output
power, noise
OK
Auto off Function
,
Hi pot test
OK
Listening test
OK
The Amp ass'y ok
END
說明:以上推斷是在操作接線正確,測試
方法正確,儀器設備正常的前提下進行的.
11
yes
no
Check U
±15Vcc etc
yes
no
Check U
yes
Check pre board
no
& power board ,
±Vcc,±15V ect
yes
Check U
no
Q .C
102 131.
cord, Transformer.
yes
no
yes
Cascade
.R
107 237
.Q ect
106 107
.Q
103 101.
R ;Ac
142