19
Check each connector
Refer to "The power can not be turned on.
(STANDBY LED lights→ash)"
4.THE POWER TURNED ON, BUT A SOUND DOES NOT OUTPUT NORMALLY
No sound is produced in other input sources.
TIs the sound outputting when turn the input selector knob.
Please check and a peripheral circuit (S3501-3507) relay
input switching
.
May be faulty of U3501-3502 (8U-210121-1) pre-amp
board.
May be faulty relay one of the speaker (S9001-9004 of
8U-110131-3).
May be faulty relay drive circuit and its speaker (S9001-
9004 of 8U-110131-3).
The amplier circuit may be faulty (8U-110131-1 or 8U-
110131-2) power amplier board.
Please check the power amplier power supply circuit
(D8001, D8002 of 8U-110131-6).
No sound is produced in both strains of SPEAKER A and B.
After about 8 seconds from power-up, operation sound of the peaker
relay is generated.
Check each connector.
Check each connector.
Is sound output from pre-out terminal ?
Is the power(± 58V) supply board power amplier (8U-110131-1 and
8U-110131-2).
The amplier circuit may be faulty (8U-210121-1) pre-amp board.
Please check pre-amp power supply circuit (8U-110131-5).
YES
NO
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
4.1. There is no sound from one channel.
4.2. There is no sound from both channel.
3.STANDBY LED FLASHES WHILE USING UNIT
(PROTECTION CIRCUIT IS SET)
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General
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