Denon AVR-1911 Service Manual page 39

Check operation of each device.
(AMP source : BD / Video input of player : 480P / Connect the TV.)
Check operation of U1001.
(18) Check power supply.
Is 1.8V supplied to C1019/C1053/C1037/L1003?
Is 3.3V supplied to C1112/C9032/C1124/C1122?
(19) Check xtal oscillator.
Is there 28.6363MHz oscillation of X1001/X1002?
(20) Check RESET.
Is RESET waveform confirmed in U5500 (53pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
(21) Check output signal.
Is waveform confirmed in R1063 (IPINDE/IPINVSYNC/
IPINHSYNC/IPINPCK). (If not continued to " L", proceed to "YES".)
Check operation of U1302.
(22) Check power supply.
Are 1.8V or 3.3V supplied to U1302 (each power supply pin)?
(23) Check xtal oscillator.
Is oscillation of X1301(27MHz) transmitted to U1302
(155pin/156pin)?
(24) Check RESET.
Is RESET waveform confirmed in U1301 (4pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
(25) Check output signal.
Is waveform confirmed in R1312(1TXDE/1TXVSYNC/1TXHSYNC),
R1309(1TXPCK). (If not continued to " L", proceed to "YES".)
Check operation of U1501.
(26) Check power supply.
Are 1.8V or 3.3V supplied to U1501 (each power supply pin)?
(27) Check RESET.
Is RESET waveform confirmed in U1501 (38pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
The pattern and circuit from the HDMI connector (K1510) to the
IC(U1510) is defective, or HDMI output circuitry is defective (U1510
and surrounding circuitry).
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
The power supply circuitry is defective.
NO
The X1001, X1002 or U1001 is defective.
NO
The RESET circuitry or U1001 is defective.
NO
The U1001 is defective.
NO
The power supply circuitry is defective.
NO
The X1301 or U1302 is defective.
NO
The RESET circuitry (U1301 and
surrounding circuitry) or U1302 is defective.
NO
The U1302 is defective.
NO
The power supply circuitry is defective.
NO
The RESET circuitry (Q1501 and
surrounding circuitry) or U1501 is defective.
39