Sony ICF-M350V User manual

SERVICE MANUAL
ICF-M350V
SUPPLEMENT-1
File this supplement with the service manual.
US Model
Subject: MAIN/KEY Board Modification
(ECN-TRB00055)
• Discrimination
– Cabinet (Rear) –
Applicable Serial No.
E1206994 and later.
Ver 1.0 1999. 12

– 2 –
• FM/TV Tracking Adjustment
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
• Remove FM antenna in FM adjustment.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1 450 kHz
AM VT VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L2 530 kHz 1.5 ±0.1 V
Confirmation 1,710 kHz 7 to 9 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 590 kHz
CT1 1,490 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T201 10.7 MHz
FM VT VOLTAGE CONFIRMATION
Frequency Display Reading on Digital Voltmeter
Confirmation TV 2CH 0.9 ±0.2 V
Confirmation 108 MHz 9 to 11.5 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L203 TV 2CH
CT202 108 MHz
TV VT VOLTAGE CONFIRMATION
Frequency Display Reading on Digital Voltmeter
Confirmation Weather 2CH 0.7 ±0.2 V
Confirmation TV 13CH 9.5 to 11.5 V
TV TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L202 Weather 2CH
CT201 TV 13CH
Adjustment Location: MAIN and KEY board (See page 3)
1. ELECTRICAL ADJUSTMENTS
0 dB=1 µV
[AM]
Setting:
BAND: AM
• AM IF Adjustment
• AM VT Voltage Adjustment
• AM Tracking Adjustment
[FM/TV]
Setting:
BAND: FM, TV or Weather
• FM IF Adjustment
• FM/TV VT Voltage Confirmation
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
4 Ω
MAIN board
TP2 (GND)
MAIN board
TP14 (DET OUT)
digital voltmeter
100 k Ω
TP13 (AM VT)
TP2 (GND) +
–
MAIN board
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level mete
r
set
4 Ω
MAIN board
TP (SP –)
MAIN board
TP (SP +)
FM RF signal
generator KEY board
TP204 (FM IF)
KEY board
TP119 (GND)
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
MAIN board
TP (SP –)
MAIN board
TP (SP +)
set
4 Ω
0.01 µ F
digital voltmeter
100 k Ω
TP118 (FM VT)
TP119 (GND) +
–
KEY board
FM RF signal
generator KEY board
TP202 (FM/TV IN)
KEY board
TP201 (GND)
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
MAIN board
TP (SP –)
MAIN board
TP (SP +)
set
4 Ω
0.01 µ F