Toshiba 32A32, Руководство по обслуживанию

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GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
MTS ADJUSTMENT (FOR N2N, N2F, N2ES CHASSIS)
No. ITEM INPUT SIGNAL ADJUSTMENT PROCEDURE
ATTENUATOR
(ATT)
1
STEREO VCO
(STVC)
2
STEREO FILTER
(STRF)
3
STEREO SEPARATION
(WBAN)
4
• 1kHz 30% mod.
→
ANT
terminal
1. Connect rms meter to pin 34 of QG01.
2. Display item
ATT on screen.
3. Change data by VOLUME
s
/
t
buttons so
that the reading of meter becomes value
as close as 137mVrms.
• No signal 1. Short circuit RG44 with a jumper wire.
2. Display item
STVC on screen.
3. Connect frequency counter to pin 34 of
QG01.
4. Change data by VOLUME
s
/
t
buttons so
that the reading of counter becomes value
as close as 15.73kHz.
5. Remove the short jumper from RG44.
• 15.734kHz 30mV(rms)
→
Across Point between CG07
and RG44
1. Unsolder the solder link SL02.
2. Display item
STRF on screen.
3. Connect oscilloscope to pin 34 of QG01.
4. Change data by VOLUME
s
/
t
button to
minimize AC output level on scope.
5. Resolder SL02.
• STEREO 300Hz (30% mod.)
R-channel only
→
ANT
1. Display item WBAN on screen.
2. Connect oscilloscope to pin 35 of QG01.
3. Change data by VOLUME
s
/
t
buttons so
that 300Hz element on scope becomes
minimum.
• STEREO 3kHz (30% mod.)
R-channel only
→
ANT
1. Display item SPEC on screen.
2. Connect oscilloscope to pin 35 of QG01.
3. Change data by VOLUME
s
/
t
buttons so
that 3KHz element on scope becomes
minimum.
SAP VCO
(SAVC)
5 • No signal
1. Shortcircuit RG44 with a short jumper.
2. Connect 1Mohm resistor between pin 12 of
QG01 and ground.
3. Display item SAVC on screen.
4. Connect frequency counter to pin 34 of
QG01.
5. Change data by VOLUME
s
/
t
buttons so
that the reading of counter becomes value
as close as 78.67kHz.
6. Remove the short jumper and 1M ohm
resistor.
(SPEC)
H001
QG01
CG44
RG44
CG07
RG43
14
7
(1)Jumper wire
+
+
H001
QG01
SL02
CG44
RG44
CG07
15.734KHz 30mV(rms)
RG43
14
7
(1)
+
+
H001
QG01
14
7
(2)
(1) Jumper
wire
12
+ +
CG44 RG43
RG44
1M
CG07