Sony XP-ZR810 Service Manual page 12

XP-ZR810
TUNER SECTION
[AM]
BAND: AM
Signal generator
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
[FM]
BAND : FM
Signal generator
FM RF signal
generator
75kHz(100%) amplitude modulation
by 1kHz signal.
Output level: as low as possible
• Connecting levelmeter
AP19 (TU-L) or
AP24 (TU-R)
• Connecting digital voltmeter
100k Ω
TP8 (VT)
12
0 dB = 1 µV
Put the lead-wire
antenna close to
the set.
0.01 µ F
FM IN
point
levelmeter
digital voltmeter
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The AM tracking adjustments should be finally done by the
trimmer capacitors.
AM FREQUENCY COVERAGE CHECK
Adjustment Part Frequency Display Reading on Digital Voltmeter
531kHz
Confirmation
(530kHz)
1602kHz
Confirmation
(1710kHz)
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on levelmeter
L3
CT3
FM/TV (L) FREQUENCY COVERAGE CHECK
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation TV 2CH
Confirmation 108MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading levelmeter
L1
TV (H)/WB FREQUENCY COVERAGE CHECK
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation WB 1CH
Confirmation TV 13CH
TV TRACKING ADJUSTMENT
Adjust for a maximum reading on levelmeter
L5 TV 10CH (197.75MHz)
Adjustment location : MAIN board (see page 13)
( ) : US, Canadian models
1.0 ± 0.5V
(1.0 ± 0.5V)
6.8 ± 0.5V
(7.6 ± 0.5V)
621kHz (620kHz)
1404kHz (1400kHz)
0.7 ± 0.4V
8.7 ± 0.5V
98.0MHz
US, Canadian models only
3.3 ± 0.5V
7.8 ± 0.5V