Service manual

RX-V665/HTR-6260

8. MANUAL TEST

The noise generator with a built-in DSP outputs the test noise through the channels specified by using the sub-menu.

The noise frequency for LFE is 30 to 80 Hz. Other than that, the noise frequency is 500 to 2 kHz.

TEST ALL

The test noise is output from all channels.

8.TEST ALL

Segment conditions of the FL driver and the FL tube are checked by turning ON and OFF all segments. Next, the op-

eration of the FL driver is checked by using the dimmer control. Then a short between segments next to each other is

checked by turning ON and OFF all segments alternately (in lattice).

(In the above example, the segments in the second row from the top are shorted.)

9. A/D DATA CHECK

This menu is used to display the A/D conversion value of the microprocessor which detects panel keys of this unit and

protection functions by using the sub-menu.

When K0/K1 menu is selected, keys become non-operable due to detection of the values of all keys.

In order to turn on the power again, disconnect the power cable of this unit from the AC outlet once and then

reconnect it again.

The figures in the diagram are given as reference only.

PS1/PS2

PSx: Power supply voltage protection detection

PS1

Voltage detects: AC_BL, AC_12, AC_5, ±12 and +5V

Normal value: 38 to 128

(Reference voltage: 3.3 V=255)

PS2

Voltage detects: -5 and +5I

Normal value: 31 to 125

(Reference voltage: 3.3 V=255)

If PS1 and PS2 are out of the normal value range, the protection function works to turn off the power.

PS1:089 2:078