Denon AVR-X8500H Service Manual

4.2. Power AMP (AMP PCB)
No audio output.
Protection is activated.
Is the power transistor open or short circuited?
DHCT-A3 / DHCT-C3
Is the emitter resistor of the power transistor
open?
0.47 Ω
Is the base resistor of the power transistor open?
47 Ω
Is the trimmer potentiometer between the base
of the power transistor open?
300 Ω
Are any other transistors faulty?
Are any other resistors faulty?
Turn on the power and, check that the voltage of each part is correct and that there is an idling cur-
rent.
Replace the power transistor.
Replace the transistor.
Replace the resistor.
Replace the emitter resistor.
Replace the base resistor.
Replace the trimmer potentiometers.
NO
NO
NO
NO
NO
NO
YES
Check the CPU.
4.3. Analog audio
No audio output.
Are the [N9028 : 5 - 7pins] in the A.AUDIO/VIDEO
PCB receiving ± 7V?
Does the audio signal ow to [N5833] on the L-
AMP CONNECT PCB and [N5841] on the R-AMP
CONNECT PCB?
Reconnect the connectors correctly.
If the malfunctioning channel and function can be identied, check the corresponding signal path.
Repair the ± 7V power supply.
Repair the power amplier.
Is the serial data for electronic volume sent to
the DIGITAL PCB?
YES
NO
YES
YES
YES
YES
YES
YES NO
YES
NO
YES
When using the protection pass mode, do not connect speakers to the speaker terminals.
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
88

Denon AVR-X8500H Specifications

General

Channels	13.2
Power Output	150W per channel (8 ohms, 20Hz-20kHz, 0.05% THD)
Frequency Response	10Hz-100kHz (+1, -3dB)
HDMI Inputs	8 (1 front)
HDMI Outputs	3
Dolby Atmos	Yes
DTS:X	Yes
IMAX Enhanced	Yes
HEOS Multi-room	Yes
Wi-Fi	Yes
Bluetooth	Yes
Voice Control	Amazon Alexa, Google Assistant, Apple Siri
Impedance	4-16 ohms
HDR Compatibility	HDR10, Dolby Vision, HLG
Audio Return Channel (ARC)	Yes
Digital Audio Inputs	2 Optical, 2 Coaxial
Analog Audio Inputs	6
Phono Input	Yes
Speaker Connectors	Binding Posts
Supported Audio Formats	MP3, WMA, AAC, FLAC, ALAC, WAV, DSD
Surround Sound Support	Dolby Atmos, DTS:X, Auro-3D
Tuner	AM/FM
Input Sensitivity/Impedance	200 mV / 47 kohms
HDCP Support	2.2
Other Connections	USB, Ethernet, RS-232C
Wireless Connectivity	Wi-Fi, Bluetooth
Signal-to-Noise Ratio	102 dB
DAC	AKM AK4490EQ (32-bit/192kHz)
Total Harmonic Distortion	0.05% (20Hz - 20kHz, 150W)