Clarion VRX575USB Service Manual page 8

NO POWER
NO POWER
Check
the point of
contact of SW
OK
Check
5V, AD1-2, RESET,
OPEN/CLOSE
of J13
OK
Check U5
2. NO SOUND
Power on, No sound all of source
POWER on
NO sound all of source
Check
VCC of U1
OK
Check
PIN1-10 of U1
OK
Check
EV_DA, EV_CLK
circuit line
OK
Check
PIN15 of U1
OK
Imperfect of U1
VRX575USB
NG
Problem of SW
NG
Problem of flat wire, J13
NG
Problem of
9V stabilization circuit D19, D75,
C99
NG
Problem of input line circuit
NG
Problem of U5
NG
Problem of mute line
Power on, No sound SP only all of source
POWER on,
NO sound SP only
all of source
Check
AMP_ON, AMP_MUTE
normally
OK
Check
the input signal
of U80
OK
Check
EV_DA, EV_CLK
circuit line
OK
Imperfect of U1
Power on, No sound AMP only all of source
POWER on,
NO sound AMP only
all of source
Check
the connection
of J2
OK
Check
the out signal
of U1
OK
Check
input signal
line of J2
OK
Check
the connection of J2
Operation radio, No sound voice only of radio
Operating radio,
NO sound voice only
of radio
Check
L_CH, R_CH Of TUNER1
normally
OK
Check
circuit of U1
- 8 -
NG
Problem of
AMP_ON, AMP_MUTE circuit
line
NG
Problem of input line circuit
NG
Problem of U5
NG
Problem of
the connection of
J2
NG
Problem of U1
Problem of
NG
LINE_FL/R,LINE_NF_L/R,LINER
L/R, LINE_SUB_L/R circuit line,
U10, U11, U13, U28
NG
Problem of
TUNER1