32
3. MAIN UNIT
3.1 Video out doesn t output.
Check the input signal to U18 .
・
Y6 (U18 6pin)
Check soldering.
・
U18 (N M2 66AV) and surrounding circuits.
・
C 44
・
R 67 R 71
Check the output signal to U18 .
・
VOUT (U18 27pin)
Check the power supply and control signal for U18 .
・
V AV (U18 3pin)
・
V MUTE (U18 1pin)
Check soldering.
・
U18 (N M2 66AV) and surrounding circuits.
・
R 72 R 73
・
C32
・
861
Replace the MAIN UNIT.
3.2. Component out doesn t output.
Check the input signal to U18 .
・
Y2 (U18 10pin)
・
Y3 (U18 14pin)
・
Y1 (U18 16pin)
Check soldering.
・
U18 (N M2 66AV) and surrounding circuits.
・
C 41 C 42 C 43
・
R 80 R 87 R 88 R 91 R 92 R 9
N.G.
O. .
Check the output signal from U18 .
・
YOUT (U18 23pin)
・
PBOUT (U18 21pin)
・
PROUT (U18 18pin)
Check the power supply and control signal for U18 .
・
V AV (U18 3pin)
・
COMP MUTE (U18 1 pin)
Check soldering.
・
U18 (N M2 66AV) and surrounding circuits.
・
R 7 R 8 R 62 R 63 R 68 R 69
・
C29 C30 C31
・
861
N.G.
Replace the MAIN UNIT.
O. .
N.G.
N.G.
O. .
O. .