Sony ICF-DVD57TV Service Manual page 18
Lcd-tv dvd kitchen clock radio
Hide thumbs
Also See for ICF-DVD57TV:
- Service manual (94 pages) ,
- Operating instructions manual (45 pages) ,
- Specifications (2 pages)
Table of Contents
Advertisement
ICF-DVD57TV
MONITOR SECTION
5-1. VOLTAGE AND FREQUENCY ADJUSTMENT
5-1-1.
5.0V Adjustment
Connection:
set
Adjustment Procedure:
1. Connect a digital voltmeter to the TP1907 and TP1901 (GND)
on the MONITOR board.
2. Adjust the RV1901 so that the reading of digital voltmeter is
5.0 ± 0.1 V.
5-1-1.
DC/DC Converter Frequency Adjustment
Connection:
set
Adjustment Procedure:
1. Connect a frequency counter to the TP1906 and TP1901
(GND) on the MONITOR board.
2. Adjust the RV1902 so that the reading of frequency counter is
243 ± 1 kHz.
5-2. VOLTAGE CHECK
5-2-1.
VDD (3.3V) Check
Connection:
set
Checking Procedure:
1. Connect a digital voltmeter to the TP1954 and TP1901 (GND)
on the MONITOR board.
2. Check that the reading of digital voltmeter is 3.1 ± 0.2 V.
5-2-2.
VGH (17.0V) Check
Connection:
set
Checking Procedure:
1. Connect a digital voltmeter to the TP1952 and TP1901 (GND)
on the MONITOR board.
2. Check that the reading of digital voltmeter is 16.8 ± 1.0 V.
18
digital
voltmeter
TP1907
+
–
TP1901 (GND)
frequency
counter
TP1906
+
–
TP1901 (GND)
digital
voltmeter
TP1954
+
–
TP1901 (GND)
digital
voltmeter
TP1952
+
–
TP1901 (GND)
5-2-3. VSS (–13.0V) Check
Connection:
set
Checking Procedure:
1. Connect a digital voltmeter to the TP1951 and TP1901 (GND)
on the MONITOR board.
2. Check that the reading of digital voltmeter is –12.0 ± 1.0 V.
5-2-4.
7.5V Check
Connection:
set
Checking Procedure:
1. Connect a digital voltmeter to the TP1909 and TP1901 (GND)
on the MONITOR board.
2. Check that the reading of digital voltmeter is 7.4 ± 0.2 V.
5-2-5.
3.9V Check
Connection:
set
Checking Procedure:
1. Connect a digital voltmeter to the TP1421 and TP1901 (GND)
on the MONITOR board.
2. Check that the reading of digital voltmeter is 3.85 ± 0.2 V.
5-2-6.
Inverter Voltage Check
Connection:
set
Checking Procedure:
1. Connect a digital voltmeter to the TP1412 and TP1901 (GND)
on the MONITOR board.
2. Check that the reading of digital voltmeter is 8.0 ± 0.2 V.
digital
voltmeter
TP1951
+
–
TP1901 (GND)
digital
voltmeter
TP1909
+
–
TP1901 (GND)
digital
voltmeter
TP1421
+
–
TP1901 (GND)
digital
voltmeter
TP1412
+
–
TP1901 (GND)
Advertisement
Table of Contents
