Sharp 29WF200, Service Manual

Page: 14 / 68

14
29WF200
29WF500
14-1
14-2
FUNCTION OPERA
TION CHECKING (VIDEO
AND
AUDIO)
(Continued)
No.
Adjusting point
Adjusting condition/procedure
W
aveform or others
COLOUR SYSTEM (29WF500 only)
1
.
Receive the "P
AL
COLOUR BAR" signal, press
the COLOUR SYSTEM key to select modes ex- cept P
AL, check the COLOUR is not working prop-
erly
.
Then, select the "P
AL" mode. Check again
its colour so that it is working properly
.
2
.
Receive "SECAM COLOUR BAR" signal, press COLOUR SYSTEM key to select modes except SECAM, check the COLOUR is not working prop- erly
.
Then, select the "SECAM" mode. Check
again its colour so that it is working properly
.
3
.
Receive “NTSC 4.43” signal, press COLOUR SYSTEM key to select modes except NTSC4.43, check the COLOUR is not working properly
.
Then,
select the “NTSC 4.43” mode. Check again its colour so that it is working properly
.
4.
Receive “NTSC 4.43/3.58 COLOUR BAR” signal thru
A
V
, press COLOUR SYSTEM key to select
modes except N4.43/3.58, check the COLOUR is not working properly
.
Then, select the “NTSC
4.43/3.58” mode. Check again its colour so that it is working properly
.
9
SOUND SYSTEM (29WF500 only)
10
1
.
Receive “P
AL-D/K” signal, press the “SOUND
SYSTEM” to select B/G, I. Check the sound out- put is not working properly
. Select D/K and check
the sound output to make sure it is working prop- erly
.
2.
Receive “P
AL-I” signal, press the “SOUND SYS-
TEM” 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 “P
AL-B/G” signal, press the “SOUND
SYSTEM” to select I, D/K. Check the sound out- put is not working properly
. Select B/G and check
the sound output to make sure it is working prop- erly
.
HEADPHONE OUTPUT CHECKING
1
.
Receive P
A
L
COLOUR BAR with SOUND 400Hz,
100% MODULA
TION (
±
50kHz Dev).
2
.
Maximum volume, and check the headphone out- put with 400Hz sound and no sound out from speaker
.
11
(Ref: Output level of Headphone is as following Apx. 500mVp-p)
NOISE MUTE CHECKING
1.
Receive "P
AL
COLOUR BAR" signal.
2
.
T
urn up the volume control to maximum, make
sure the sound is beard from the speakers.
Then
put the unit in no signal state.
3.
Check the sound mute is ef
fective.
4.
Finally turn sound level of CTV to minimum.
12
No.
Adjusting point
Adjusting condition/procedure
W
aveform or others
H•V PROTEC- TO
R
1.
Receive E-5CH (Monoscope Pattern).
2
.
Connect the Bias Box to the cathode side (R653) of D652.
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.
1
OTHER PROTECT
ORS
OUTPUT CHECKING
*
Correspondence for short circuit of smoothing electrolysis of +B line and so on. T
o
check the operation of protector and so on,
take care for the breakage, deterioration and so on of each element.
2
PROTECT
OR OPERA
TION CHECKING
Reference
Approx. 12.2V as or-
dinary
.