Funai PLF-76-T Service manual

TFT PORTABLE DVD/TV PLAYER

FUNAI PLF-76T

SERVICE MANUAL

CAUTION: Before servicing the chassis, read the “IMPORTANT SERVICE SAFETY INFORMATION” section on

 2005- PRINTED IN

M566MB

page 2 of this manual.

SPECIFICATIONS

z GENERAL SPECIFICATION

z 7” ACTIVE-MATRIX TFT TYPE. z DVD, VCD, CD, CD-R, CD-RW, MP3, HDCD

SUPPORTS.

z 16:9 / 4:3 PICTURE SELECT. z TV TUNER SYSTEM z VHF LOW/VHF HIGH/UHF SELECTION. z UP/DOWN CHANNEL TUNING. z HIGH BRIGHTENNESS. z HIGHT CONTRAST. z WITH LOGO OPENING SCREEN. z SLOW MOTION ½, 1/4, 1/8, 1/16 z F.B / F.F x2, x4, x8, x16 SPEED. z ANGLE MENU. z 20 TRACK PROGRAM FOR CD PLAYING. z ZOOM x 2, 3, 4. z REMOTE CONTROL. z EXTERNAL VIDEO/AUDIO IN x1. z S. VIDEO OUTPUT (for Ext. TV Monitor) z HEADPHONE OUT x 1. z AUDIO OUTPUT 0.5W x 2/8 ohm. z LONG BATTERY TIME OF OVER 2 HRS. z DIMENSION :

212(L) x 170(W) x 430(H) mm(excluding battery)

z AC POWER SOURCE:

ADAPTER: 230V

z DC POWER SOURCE:

BATTERY PACK: 7.2V

CONTENTS

IMPORTANT SERVICE SAFETY INFORMATION................2

DISASSEMBLY FOR REPAIR .................................................3

WIRING DIAGRAM……………………………………....……4

BLOCK DIAGRAM....................................................................5

CIRCUIT DESCRIPTION .............................……………...6~14

PARTS LIST ..........................................…………............ 15~25

EXPLODED VIEW (UNIT ) ................................................... 26

SCHEMATIC DIAGRAMS.................................................27~32

PRINTED CIRCUIT BOARDS.......................................... 33~40

Note: Follows a policy of continuous advancements in development. For this reason specifications may be changed without notice.

IMPORTANT SERVICE SAFETY INFORMATION

1. SAFETY PRECAUTIONS

Before returning a unit to the customer, always make a safety check of the entire unit, including, but not limited to the following items: a. Be sure that no built-in protective devices are defective and/or have been defeated during servicing. (1) Protective shields are provided to protect to protect both the technician and the customer. Correctly replace all missing protective shields including any removed for servicing convenience. (2) When reinstalling the chassis and/or other assemblies in the cabinet, be sure to put back in place all protective devices, including, but not limited to, nonmetallic control knobs, insulating fishpapers, adjustment and compartment covers/shields and isolation resistor capacitor networks. Do not operate this unit of permit it to be operated without all protective devices correctly installed and functioning. b. Be sure that there are no cabinet openings through which an adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to, excessively wide cabinet ventilation slots, and an improperly fitted and/or incorrectly secured cabinet back cover. c. Leakage Current Hot Check - With the unit completely reassembled, plug the AC line cord directly into a AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering system that complies with American National Standards institute (ANSI) C101.1 “Leakage Current for Appliances” and Underwriters Laboratories (UL) 1410, (50.7). With the unit AC switch first in the ON position and then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shaft, ect.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milliamp. Reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.

AC LEAKAGE TEST

(READING

TEST ALL EXPOSED

DEVICE

UNDER

TEST

METAL SURFACES

2-WIRE CORD ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUG A REQUIRED)

LEAKAGE CURRENT TESTER

SHOULD NOT BE ABOVE

0.5mA)

EARTH GROUND

d. Insulation Resistance Test Cold Check (1) Unplug the power supply cord and connect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure the resistance with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on the unit, such as screwheads, antenna, control shaft, handle brackets, etc. When the exposed metallic part has a return path to the chassis, the reading

ANTENNA TERMINAL

EXPOSED

METAL

PART

OHMMETER

should be between 1 and 5.2 Megohm. When there is no return path to the chassis, the reading must be “infinite”. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and rechecked before it is returned to the customer.

2. PRODUCT SAFETY NOTICE

Some electrical and mechanical parts have special safety related characteristics which are often not evident from visual inspection, nor can be protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have

special safety characteristics are identified by a

¡I

on schematic and parts list. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. Product Safety is under review continuously and new instructions are issued whenever appropriate.

3. SERVICING PRECAUTIONS CAUTION: Before servicing the unit covered by this service manual and its supplements, read and follow the SAFETY PRECAUTIONS on this page. NOTE: If unforeseen circumstances create a conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. Remember: Safety First. General Servicing Precautions. a. Always unplug the unit’s AC power cord from the AC power source before: (1) removing or reinstalling any component, circuit board, module, or any other unit assembly. (2) disconnecting or reconnecting any unit electrical plug or other electrical connection. (3) connecting a test substitute in parallel whit an electrolytic capacitor in the unit. Caution: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. b. Do not defeat any plug/socket B+ voltage interlocks with which the unit covered by this service manual might be equipped. c. Do not apply AC power to this unit and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. d. Always connect a test unit ground lead to the unit chassis ground before connecting the test unit positive lead. Always remove the test instrument’s ground lead last.

4. LASER PRECAUTIONS WARNING!

1. When servicing (in case it is necessary to confirm Laser Beam Emission), be sure not to place your eyes any closer than 1 ft or 30cm from the surface of the Object Lens on the Optical Pickup Block. HANDLING THE LASER PICKUP

2. Laser diodes are extremely susceptible to damage from static electricity. Even if a static discharge does not ruin the diode, it can shorten its life or cause it to work improperly. When replacing the pickup, use a conductive mat on the floor and desk and wear a wrist band connected to ground through a 1M ohm resistor to protect the laser diode from static damage. If the lens should get dusty, blow off the dust carefully from the object.

3. There are no adjustable parts in the pickup assembly. If it is defective, replace the whole pickup assembly. CAUTION: USE OF CONTROLS, ADJUSTMENTS OR PERFORMANCE OF PROCEDURES HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. DANGER: IF INTERLOCK FAILS OR IS DEFEATED, THE LASER LIGHT IS ABLE TO FUNCTION. THE LASER IS INVISIBLE, AVOID DIRECT EXPOSURE TO BEAM.

DISASSEMBLY FOR REPAIR

TO DISASSEMBLY THE BOTTOM METAL CABINET

1. Remove the 14 screws (A) from bottom metal cabinet.

TO REMOVE THE INNER PANEL

2. Remove the 6 screws (B) from the inner panel and out panel.

WIRING DIAGRAM

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

NiMH BATTERY CHARGER CONTROLLER: LS2964S (U5)

Timer

VDD

LED

OSC

GND

DUAL OPERATIONAL AMPLIFIER: RC4558D (U6)

A OUTPUT

A -INPUT

A +INPUT

V -

V +

B OUTPUT

B -INPUT

B +INPUT

PWM

Vdet

Idet

TRIPLE 2-CHANNEL ANALOG MULTIPLEXER /DEMULTIPLEXER: 74HC4053 (U2)

CIRCUIT DESCRIPTION

PROGRESSIVE SCAN DVD PLAYER COMBO CHIP: MT1389QE/D (U101)

SWITCHING REGULATOR CONTROLLER FOR LCD BIAS: AT1380HP(U13)

CIRCUIT DESCRIPTION

2-WIRE SERIAL EEPROM: AT24C02A-10SC-207 (U12)

DUAL LOW-VOLTAGE POWER AMPLIFIER: NJM2073M (U3)

CIRCUIT DESCRIPTION

D/A CONVERTER FOR AUDIO: PCM1742KE-TBB (U7)

DUAL COMPARATORS: LM393DR (U10)

VOLTAGE REGULATOR: 78 L 08 (Q1)

GND

OUT IN

CIRCUIT DESCRIPTION

4-CHANNEL BTL MOTOR DRIVER FOR CD-ROM: AT5654H (U102)

300/500MA LOW DROPOUT LINEAR VOLTAGE REGULATOR: RP1102-33CGL (U1,Q2)

CIRCUIT DESCRIPTION

8M CMOS SINGLE VOLTAGE 3V ONLY HIGH SPEED FLASH: AT49BV802AT-70TU (U11)

INFRARED REMOTE CONTROL TRANSMITTER : SC6122-001 (IC1)

KI KI KI KI KI

REM

SEL

OSCO

OSCI

1 2 3 4 5 6KI 7 8 9 10

12 13

22 21 20

18 17 16 15

1411

CCS KI/O KI/O KI/O19 KI/O KI/O KI/O KI/O

KI/O LMP

CIRCUIT DESCRIPTION

2 BANKS X 512K X 16 BIT SYNCHRONOUS DRAM : K4S641632H-UC75 TSOP-54 (U9)

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