Read Sharp 37VT-26H Service Manual online
37VT-26H(GY)
16
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PAL CHROMA ADJUSTMENT
1. SUB-COLOUR ADJUSTMENT (I
2
C bus data adjustment)
1. Receive the PAL colour bar signal.
2. Put the set in the service mode.
3. Select the sub-colour mode (COL).
4. Connect the oscilloscope to TP1852 (RED cath-
2. Put the set in the service mode.
3. Select the sub-colour mode (COL).
4. Connect the oscilloscope to TP1852 (RED cath-
ode). (Use a 10 : 1 probe.)
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Range:
20 V/div.
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Sweep time: 20
µ
sec/div.
5. Adjust the sub-colour data so that the 75% white
and red portions of the PAL colour bar be at the
same level. See
same level. See
Fig. 4.
6. Exit from the service mode.
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When getting out of the SUB-COLOUR mode,
the sub-colour data turns up 15.
the sub-colour data turns up 15.
W Y CY G MG R B
To be at the same level
W Y CY G MG R B
About 3 Vp-p
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NTSC CHROMA ADJUSTMENT
1. SUB-TINT ADJUSTMENT (I
2
C bus data adjustment)
1. Receive the NTSC colour bar signal.
2. Put the set in the service mode.
3. Select the SUB-TINT mode (TINT).
4. Connect the oscilloscope to TP802 (B-Y OUT).
2. Put the set in the service mode.
3. Select the SUB-TINT mode (TINT).
4. Connect the oscilloscope to TP802 (B-Y OUT).
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Range :
10 mV/div. (AC)
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Sweep time : 10
µ
sec/div.
(Use a 10 : 1 probe.)
5. Adjust the sub-tint data to obtain the waveform as
shown in
Fig. 5.
6. Exit from the service mode.
Fig.5
Fig.4
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A/V INPUT AND OUTPUT CHECK (1)
1. VIDEO and AUDIO OUTPUT CHECK
1. Receive the E-69CH.
(100% white colour bar, 400 Hz, 100% modulation audio)
2. Terminate the video output with a 75
Ω
impedance. Make sure the out-
put is as specified
(1.0 Vp-p
(1.0 Vp-p
±
3 dB(0.71 – 1.41 Vp-p).
3. Terminate the audio output with a 10k ohm impedance. Make sure the
output is as specified (2.6 Vp-p
±
3 dB(1.84 – 3.67 Vp-p).
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Make sure the video and audio signals from the tuner are outputted.
WAVEFORM & OTHER
21PIN SCART
21PIN SCART
VIDEO OUT
19 PIN
AUDIO OUT
1, 3 PIN
SC401(REAR)........AV1
1. Receive the E-69CH.
2. Feed the video and audio signal via the A/V input jacks.
3. Using the CH
2. Feed the video and audio signal via the A/V input jacks.
3. Using the CH
'
/
"
keys on the remote controller, change to the AV
mode and make sure the external video and audio outputs are accord-
ingly given.
(The AV mode can be picked up between 1CH and 0CH.)
CH
ingly given.
(The AV mode can be picked up between 1CH and 0CH.)
CH
'
99
→
0
→
AV1
→
AV2
→
1
→
2
CH
"
2
→
1
→
AV2
→
AV1
→
0
→
99
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The AV mode may also be picked up using the TV/VIDEO key on
the remote controller.
RF
the remote controller.
RF
→
AV1
→
AV2
→
RF
WAVEFORM & OTHER
SC401(REAR)........AV1
J1401(FRONT).......AV2
J1401(FRONT).......AV2
2. VIDEO and AUDIO INPUT CHECK
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