HT-GT1
28
SECTION 5
TROUBLESHOOTING
1. When sound is not outputted
2. When liquid crystal display is not displayed
Yes
Yes
Yes
NoNo
No
Sound is not output from all
functions.
The voltage of the following
pin is 36 V.
MAIN board: CN4001
Between the pin 1 (V1) and
pin 4 (V1_GND).
Fuse (F100) on the SMPS
board conduct the electricity.
The voltage of the following
pin is “H”.
MAIN board: IC002
pin 2 (RESET)
Replace the IC002 on the
MAIN board.
Replace the Q101 and Q103
on the SMPS board.
Sound is not outputted
Yes
Replace the fuse (F100) on the
SMPS board.
Check and repair the IC002
on the MAIN board and the
surrounding circuit.
Replace check the wire
and speaker.
Yes
Yes
No
Display does not change when
you press the [DISPLAY] button
on the remote commander.
The liquid crystal display is
displayed, when pull out the
speaker cable (CN2001 (for
SP1) and TB003 (for SS-GT1)
on the MAIN board), and then
turn the AC power on/off again.
DC detection of IC002 is working.
Check the short-circuit (the power
source or the earth fault) of the
audio output line of the IC002.
Replace the IC002 if there is
no problem.
Liquid crystal display is
not displayed
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