Adcom GTP-870HD user manual Troubleshooting, Symptom Possible Reason Possible Solution

Chapter 5 - Help

Troubleshooting

The table below shows possible causes and solutions to common GTP-870HD issues. If you do not see the an- swers you need here, please contact your Adcom dealer or customer service department; see page 63.

Symptom	Possible Reason		Possible Solution
No sound	•	Power cable unplugged	•	Plug in power cable
	•	Rear panel power switch turned off (0)	•	Turn rear panel power switch on (1)
	•	Tape Monitor selected	•	Press Tape to de-select Tape Monitor
	•	Mute on	•	Switch off Mute
	•	Incorrect Input Config setting	•	Make sure audio input is set correctly in Input
	•	Amplifier powered off		Config menu
			•	Power on amplifier
No sound on one	•	Speaker not properly connected or damaged	•	Check connections and speakers
channel	•	Input cable disconnected or damaged	•	Check cables and connections
	•	Speaker set to “None” in menu system	•	In Speaker Config menu, set speaker to “Small” or
				“Large”
No sound on surround	•	No surround mode selected	•	Select a surround mode
channels	•	Mono sound source	•	Test system with stereo or Dolby Surround mate-
	•	Speakers/amplifier not properly connected		rial
	•	Surround volume level too low	•	Check speaker/amplifer connections
			•	Increase surround volume level
No sound on center	•	Center speaker set to “None” in menu system	•	In Speaker Config menu, set Center speaker to
channel	•	Speakers/amplifier not connected properly		“Small” or “Large”
	•	Center volume level set too low	•	Check speaker/amplifier connections
			•	Increase Center volume level
“Dolby Digital” OR	•	Source not connected using digital input	•	Connect digital output of source to GTP-870HD
“DTS” auto-detec-	•	Incoming signal is set to PCM instead of Bitstream	•	Check the Digital Out setting on your source
tion function does not				component
work
Weak bass/diffuse	•	Speakers wired out of phase	•	Check connections to all speakers in the system
stereo image
Remote control not	•	Batteries dead, or incorrectly inserted	• Check or replace batteries
working	•	IR transmitter or receiver windows obstructed	•	Remove obstruction
	•	IR receiver in direct sun or bright ambient light	•	Place unit away from direct sun, reduce amount
				of ambient light
No sound with tuner	•	Antenna leads incorrectly connected	•	Check antenna connections to preamplifier
	•	Station not selected or weak signal	•	Re-tune
	•	Mute on	•	Switch off Mute
Noise, hiss on AM and	•	Weak signal	•	Check station tuning
FM			•	Adjust or replace antenna
			•	Press St/Mono button to reduce hiss
Distortion on FM	•	Multi-path signals or interference from another	•	Check station tuning
		station	•	Adjust or replace antenna
Whistles or buzzes on	•	Interference from other electrical sources, e.g.,	•	Check station tuning
FM & AM		computers or games consoles	•	Switch off or move the source of the electrical
				noise
Whistles or buzzes	•	Interference from fluorescent lighting or electri-	•	Check station tuning
on AM		cal motor	•	Adjust or replace AM antenna
No picture	•	Incorrect TV input selected	•	Check the input setting on your TV
			•	If the GTP-870HD is connected to your TV in
				more than one way (e.g., S-video and Component
				video), select the TV input that corresponds with
				your selected source component
Cannot access setup	•	Not in Main mode	•	Press Main, then press Setup
menu	•	HDMI or Progressive Scan video output selected	•	Select Video, S-video, or Component output to
				view Setup menus
Cannot power off unit	•	Setup menu is active	•	Press Setup to exit the Setup menu, then power
				off unit

64GTP-870HD Owner’s Manual