Sony HCD-VX55 Service Manual page 2

Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tourist model : 76 - 108 MHz
Tuning range
Other models : 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Middle Eastern models: 531 – 1,602 kHz
(with the interval set at 9
kHz)
Other models: 531 – 1,602 kHz
(with the interval set at 9
kHz)
530 – 1,710 kHz
(with the interval set at 10
kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
Thailand models: 220 V AC, 50/60 Hz
Other models: 120 V, 220 V or 230 - 240
V AC, 50/60 Hz
Adjustable with voltage
selector
230 watts
Power consumption
Approx. 280 x 360 x 425
Dimensions (w/h/d)
mm (11 x 14
in.)
Approx. 9.5 kg
Mass:
(21 lb.)
Supplied accessories: AM loop antenna (1)
Remote commander (1)
Batteries (2)
Video cable (1)
FM lead antenna (1)
Front speaker pads (8)
Design and specifications are subject to change
without notice.
1. Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
4. Look for parts which, through functioning, show obvious signs
of deterioration. Point them out to the customer and
recommend their replacement.
2
3 / x 16 11 /
16 16
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety
checks before releasing the set to the customer.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.