Sharp 29F-PS370, Руководство по обслуживанию

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29F-PS370
CHECKING FUNCTION OPERATION (2) (VIDEO & AUDIO) CONTINUED
NO ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS
9 SOUND SYSTEM (1) Receive "PAL-D/K" signal, press the "SOUND SYSTEM"
to select B/G, I. Check the sound output is not working properly.
Select D/K and check the sound output to make sure it is working properly.
(2) Receive "PAL-I" signal, press the "SOUND SYSTEM"
to select B/G, D/K. Check the sound output is not working properly.
Select I and check the sound output to make sure it is working properly.
(3) Receive "PAL-B/G" signal, press the "SOUND SYSTEM"
to select I, D/K. Check the sound output is not working properly.
Select B/G and check the sound output to make sure it is working properly.
10 NOISE MUTE (1) Receive "PAL COLOUR BAR" signal.
CHECKING
(2) Turn up the volume control to maximum, make sure the sound is
heard from the speakers. Then put the unit in no signal state.
(3) Check the sound mute is effective.
(4) Finally turn sound level of CTV to minimum.
PROTECTOR OPERATION CHECK
NO ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS
1 H.V Protector (1) Receive E-5ch (Monoscop pattern).
Ref : Apx.13.3V.
(2) Connect the bias box to the cathode side (R607) of D604.
(3) Set the voltage of the bias box at 10V, and verify that the protector does not operate.
(4) Set the voltage of the bias box at 18V, and verify that the protector operate.
SOUND OUTPUT CHECKING
NO ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS
1 Front speaker output (1) Receive the E-10ch (PAL colour bar).
checking
(2) Set the volume to maximum and set the other sound setting as follow.
Setting item
AV Mode
Surround
Treble
Bass
Balance
Loudness ON
Movie
ON(1)
0
+10
+10
11 HEADPHONE OUTPUT (1) Receive “PAL COLOUR BAR” with sound 400 Hz,100%modulation ( ± 50 kHz Dev )
(2) Maximum volume, and check the headphone output with 400kHz sound and no sound
out from speaker.
Ref. OUTPUT level of HEADPHONE is as following
Apx. 500 mVp-p
12
MONO BILINGUAL
FUNCTION CHECKING
(1) Receive Momo Bilingual chanel .
(2) Press R/C “MPX” button, and the sound will change
from sound 1 to sound 2
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