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2-3. Internal Test Signal
The PR-337 board contains an internal test signal generator circuit and a test pin (TP501) for checking
waveforms.
An internal test signal (TEST1, TEST2, or TEST3) is selectable from the SERVICE menu and can be
output. (For details, refer to Section 3 "Setting Menu" and "3-4. SERVICE Menu".)
Waveform test points
Signal waveforms at test points [1] to [5] can be output to the test pin (TP501) on the PR-337 board.
Checking waveforms makes it possible to identify the failure location.
Camera connector
[1]
ADC
IC301
Test signal setting switch and test pin
S601
1
TP501
2
3
A
B
TEST SIGNAL
To change the signal type to be output to the test pin (TP501/PR-337 board), change the settings of bit1
and bit2 of S601 (PR-337 board).
Output signals
S601 on the PR-337 board settings
Bit 1
― (Not output)
OFF
Y or G
ON
Pb or B
OFF
Pr or R
ON
2-2
[2]
SIGNAL
PROCCESOR
TEST1
[3]
SIGNAL
PROCCESOR
TEST2
IC401
C
D
PR-337 board (Side A)
Bit 2
OFF
OFF
ON
ON
SIGNAL
[4]
PROCCESOR
TEST3
IC801
E
[5]
SIGNAL
PROCCESOR
HDVF-EL70/HDVF-EL75
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