Denon AVR-2311CI Service Manual page 42

Check operation of each device.
(AMP source : DVR [i/p:OFF] / Video input of player : 480P / Connect
the TV.)
Check operation of U1002 (ADV3002).
(23) Check power supply.
Are 5V or 3.3V supplied to U1002 (each power supply pin)?
(24) Check RESET.
Is RESET waveform confirmed in U1002 (36pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
(25) Check output signal.
Is TMDS waveform confirmed in 25pin/26pin/28pin/29pin/31pin/32
pin/34pin/35pin.
Is waveform confirmed in 67pin/68pin to DDC_SCL/DDC_SDA.
(If not continued to " L", proceed to "YES".)
Check operation of U1100 (ADV7840).
(26) Check power supply.
Is 1.8V supplied to C1118/C1154/C1125/L1102?
Is 3.3V supplied to C11181/C1208/C1201?
(27) Check Xtal oscillator.
Is oscillation of X1101/X1103(28.6363MHz) transmitted?
(28) Check RESET.
Is RESET waveform confirmed in U5500 (53pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
(29) Check output signal.
Is waveform confirmed in R1148(HRDE/HRVSYNC/HRHSYNC/
HRPCK). (If not continued to " L", proceed to "YES".)
YES
YES
YES
YES
YES
YES
YES
NO
The power supply circuitry is defective.
NO
The RESET circuitry (Q1009 and
surrounding circuitry) or U1002 is defective.
NO
The U1002 is defective.
NO
The power supply circuitry is defective.
NO
The X1101/X1103 or U1100 is defective.
NO
The RESET circuitry or U1100 is defective.
NO
The U1100 is defective.
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