Amiga 1000 - Page 7

AMIGA
1000
ASSEMBLY LEVEL
REPAIR
1.5
VIDEO
OUTPUT CHECK
1.5.1
Measure signals on the PCB at
locations:
A. Resistor R16
—Should
=
Approx. +5 Volt
Composite
Sync
B.
Resistor
R23
—Should
-
Approx. +1 Volt
Analog
Blue
C.
Resistor R24 —Should
-
Approx, +1 Volt
Analog
Green
D.
Resistor R25
—Should
-
Approx. +1 Volt
Analog
Red
If ALL readings
are
CORRECT,
check
MONITOR and
CABLE
CONNECTIONS.
If MONITOR and
CONNECTIONS
ARE OK,
REPLACE
the
COMPUTER PCB.
Refer to
SECTION
2,
COMPUTER DISASSEMBLY,
Steps 2.5
and 2.6.
If ANY
readings are
INCORRECT, REPLACE the
COMPUTER
PCB.
Refer to SECTION 2,
COMPUTER DISASSEMBLY, Steps 2.5
and
2.6.
1-5