Marantz NR1609 Service Manual page 107

When the results of check item (41) are "00"
(Detection of 5V is not OK)
Check the +5V voltage. (HDMI Rx)
Check item(43). Check the +5V voltage.
Does "+5V" at the following test point indicate 5 V?
N1004 N1003 N1002 N1001
HDMI 4 HDMI 4 HDMI 3 HDMI 3 HDMI 2 HDMI 2
[GAME] [GAME] [Blu-ray] [Blu-ray] [DVD] [DVD] [SAT/CBL] [SAT/CBL]
+5V +5V
+5V
N1007 N1006 N1005
HDMI 7 HDMI 7 HDMI 6 HDMI 6
[CD] [CD] [AUX2] [AUX2] [MEDIA PLAYER] [MEDIA PLAYER]
+5V +5V
YES
HDMI Rx [U1000 or U1003] is faulty.
Replace with a new device.
Recheck from check item (2).
If it does not work, replace the PCB.
HDMI 1 HDMI 1
+5V
HDMI 5 HDMI 5
+5V
NO
Check for a short circuit in the 5 V line and the 5
V Switch IC [U1002].
If there is no problem, the HDMI Rx
U1003] or the 5V Switch IC [U1002] is faulty
Replace with a new device.
When the results of check item (42) are
(Detection of DDC is not OK.)
Check the DDC line. (HDMI Rx)
Check item(44). Check the DDC line :
Are waveforms of "DDCSCK" and "DDCSDA" observed at the test point near the HDMI input terminal?
N1004 N1003
HDMI 4 HDMI 4 HDMI 3 HDMI 3
[GAME] [GAME] [Blu-ray] [Blu-ray]
N1007
HDMI 7 HDMI 7
[CD] [CD]
DDCSCK
DDCSDA
HDMI Rx [U1000 or U1003] is faulty.
[U1000 or
Replace with a new device.
Recheck from check item (2).
If it does not work, replace the PCB.
107
"00 or 04"
less than 100KHz
N1002 N1001
HDMI 2 HDMI 2 HDMI 1 HDMI 1
[DVD] [DVD] [SAT/CBL] [SAT/CBL]
N1006 N1005
HDMI 6 HDMI 6 HDMI 5 HDMI 5
[AUX2] [AUX2] [MEDIA PLAYER] [MEDIA PLAYER]
This diagram shows an example of the DDC communica-
tion waveform.
-The high level voltage is 5V.
-The frequency of the DDC CLK is 100KHz or less.
Check at each test point.
Voltage scale：2.0V/div
Time scale：40us/div
YES
Check for a short circuit in the DDC line.
If there is no problem, the HDMI Rx1 [U1000] or
HDMI Rx2 [U1003] is faulty.
Replace with a new device.
5V
5V
NO