Panasonic PT-EZ590E / PT-EZ590LE / PT-EW650E / PT-EW650LE / PT-EW550E / PT-EX620E / PT-EX620LE / PT-EX520E (serv.man8) Service Manual ▷ View online
INF-35
SECTION 1 SERVICE INFORMATION
<EZ590/EW650/EW550/EX620/EX520>
■ SERIAL IN does not respond
J
Check the cable connection of JK1506 (SERIAL IN)
NG
A Connect the connector securely
A The signal waveform can be detected at pins 7, 8 of IC1301 when
the serial command is transmitted.
NG
A Check IC1301 and peripheral circuits
J
The signal waveform can be detected at pins 12, 13 of [J01] when
the serial command is transmitted.
NG
J
Replace [J]-P.C.Board
A Replace [A]-P.C.Board
OK
OK
OK
■ Controls on panel does not respond
S Check the voltage (DC 3.3V) at pin 1 of connector [S1] when the
power is turned on.
NG
A Check the [3.3V] power line on the [A]-P.C.Board
A Check the connection cable between [A34] - [S1]
NG
Replace the cable
S Check the voltage [DC 3V] at pins 2 - 5 of connector [S1]
NG
S Check the [3.3V] power line on the [S]-P.C.Board
A Check that the voltage changes at L9065 - L9068 when some of
the control button are pressed
NG
S Replace [S]-P.C.Board
A Replace [A]-P.C.Board
OK
OK
OK
OK
INF-36
SECTION 1 SERVICE INFORMATION
<EZ590/EW650/EW550/EX620/EX520>
■ No sound
A/J
[ANALOG]
Check the connections [JK1501] (AUDIO IN1/2), [JK1505]
(AUDIO IN3)
[DIGITAL]
Check the connections [JK8001] (HDMI1), [JK8002](HDMI2),
[JK8801](DIGITAL LINK)
NG
Check the cable connection securely
J
[ANALOG]
Check the waveform at pins 2, 3, 22, 23 of connector [JK1504]
Check the waveform at pins 1 and 3 of connector [JK1505]
NG
J
Check connectors [JK1504], [JK1505] and peripheral
circuits
[ANALOG]
Check the cable connection between connectors [J01] - [A01]
NG
Replace the cable
J
[Common]
Check the waveform at pins 1, 2, 4, 5, 11, 12, 14, 15 of IC1501.
NG
J
Check IC1501 and peripheral circuits
A [Common]
Check the waveform at pin 5, 10, 2, 13 of IC1202.
NG
A Check IC1202 and peripheral circuits
OK
NO
OK
OK
OK
OK
Check each cable connection
No sound with built-in speaker
NO
Follow the section "Built-in speaker check"
No sound with external speakers
NO
Follow the section "AUDIO OUT check"
No sound with built-in and external speakers
A [Common]
Check the waveform at pin 12 of IC1201.
NG
A Check IC1201 and peripheral circuits
A Replace [A]-P.C.Board
OK
INF-37
SECTION 1 SERVICE INFORMATION
<EZ590/EW650/EW550/EX620/EX520>
■ Built-in speaker check
■ AUDIO OUT check
A Check the waveform at pins 1 and 3 of connector [A02]
NG
J
Check IC1201 and peripheral circuits
Replace speaker
A Replace [A]-P.C.Board
OK
NG
A
[ANALOG]
Check the connection cable between connectors [A01] and
[J01]
NG
Replace the cable
J
Replace [J]-P.C.Board
A Replace [A]-P.C.Board
NG
OK
INF-38
SECTION 1 SERVICE INFORMATION
<EZ590/EW650/EW550/EX620/EX520>
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