Sharp SX68JF100 Service Manual page 12

FUNCTION OPERATION CHECK (2) (VIDEO AND AUDIO)
NO. Adjustment part Adjusting procedure and conditions
1 When E-12CH PAL COLOUR BAR is received
11 COLOUR
SYSTEM and another mode except PAL or AUTO is se-
lected in the colour system,
Verify that the colour must not be properly op-
erated.
2 When E-10CH SECAM COLOUR BAR is re-
ceived and another mode except SECAM or
AUTO is selected in the colour system,
Verify that the colour must not be properly op-
erated.
3 When E-37CH NTSC 4.43 COLOUR BAR is
received and another mode except N4.43 or
AUTO is selected in the colour system,
Verify that the colour must not be properly
operated.with UP/DOWN.
4 When JA-8CH NTSC 3.58 COLOUR BAR is
received and another mode except N3.58 or
AUTO is selected in the colour system,
Verify that the colour must not be properly op-
erated.
1 When OI-9CH PAL COLOUR BAR is received
12 SOUND
SYSTEM and M, B/G, I is selected in the sound system,
Verify that the sound must not be properly out-
put.
2 When E-23CH monoscope is received and M,
B/G, D/K is selected in the sound system,
Verify that the sound must not be properly out-
put.
3 When E-12CH colour bar is received and M, I,
D/K is selected in the sound system,
Verify that the sound must not be properly out-
put.
4 When JA-8CH colour bar is received and B/G,
I, D/K is selected in the sound system,
Verify that the sound must not be properly out-
put.
1 Receive E-5CH music broadcast.
13 SPATIALIZER
2 The sound mode must be switched with
Key
SPATIALIZER key (R/C) as follows.
SPATIALIZER OFF
SPATIALIZER 1
SPATIALIZER 2
3 Verify that the sound from the speaker in the
MONO mode is felt to be wide.
1 Receive E-5CH music broadcast.
14 S-BOOSTER
2 Select S-BOOSTER in S-mode.
3 The high/low bands must be varied with ON/
OFF.
(The high/low bands must be raised with ON.)
Waveform and others
Note: Take care that the colour and
sound must not be properly
operated with the special sig-
nal E-4, E-37, J-38 and E-64
in the auto mode.(Check it in
the forcible mode.)
Note: Take care that 5.5M of 1 and
6.5M of 3 are slight in the
variation.
R/C key or MENE screen
↓
↓
↓
12-1
PROTECTOR OPERATION CHECK
NO. Adjustment part Adjusting procedure and conditions
1 Receive E-5CH (monoscope pattern).
1 H, V protector
2 Connect the bias box to the cathode side
(R1662 side) of D1621.
3 Set the voltage of the bias box at 15V, and verify
that the protector does not operate.
4 Set the voltage of the bias box at 24V, and verify
that the protector operates.
1 Correspondence for short circuit of
2 Other protectors
smoothening electrolysis of +B line and so on
To check the operation of the protector and so
on, take care for the breakage, deterioration
and so on of each element.
Waveform and others
Reference Approx. 17.7 V as
ordinary
12-2