Denon DVM-1805 Service Manual

SERVICE MANUAL

For U.S.A & Canada model

MODEL

DVD VIDEO AUTO CHANGER

DVM-1805

Some illustrations using in this service manual are slightly different from the actual set.

16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN

Telephone: 03 (3837) 5321

X0158 NC 0209

TABLE OF CONTENTS

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

STANDARD NOTES FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories.

"DTS" and "DTS Digital Out" are trademarks of Digital Theater Systems Inc.

SPECIFICATIONS

ITEM CONDITIONS UNIT NOMINAL LIMIT

1. Video Output 75 ohm load Vpp 1.0

2. Optical Digital Out dBm -18

3. Audio (PCM)

3-1. Output Level 1kHz 0dB Vrms 2.0

3-2. S/N dB 110

3-3. Freq. Response

DVD fs=48kHz 20~22kHz dB ± 2

CD fs=44.1kHz 20~20 kHz dB ± 2

3-4. THD+N 1 kHz 0dB % 0.005

NOTES:

1. All Items are measured without pre-emphasis unless otherwise specified.

2. Power supply : AC120 V 60 Hz

3. Load imp. : 100 K ohm

4. Room ambient : +25

- 3 -

LASER BEAM SAFETY PRECAUTIONS

This DVD player uses a pickup that emits a laser beam.

Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.

The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.

Caution: Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure.

rive Mecha Assembly

Laser Beam Radiation

Laser Pickup

Turntable

CAUTION

LASER RADIATION

WHEN OPEN. DO NOT

STARE INTO BEAM.

Location: Inside Top of DVD mechanism.

- 4 -

IMPORTANT SAFETY PRECAUTIONS

Product Safety Notice

Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the 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 # on schematics and in parts lists. 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. The Product’s Safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are carefully inspected to confirm with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

Precautions during Servicing

A. Parts identified by the # symbol are critical for

safety. Replace only with part number specified.

B. In addition to safety, other parts and assemblies

are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.

C. Use specified internal wiring. Note especially:

1)Wires covered with PVC tubing

2)Double insulated wires

3)High voltage leads

D. Use specified insulating materials for hazardous

live parts. Note especially:

1)Insulation tape

2)PVC tubing

3)Spacers

4)Insulators for transistors

E. When replacing AC primary side components

(transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.

F. Observe that the wires do not contact heat produc-

ing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.).

G. Check that replaced wires do not contact sharp

edges or pointed parts.

H. When a power cord has been replaced, check that

5 - 6 kg of force in any direction will not loosen it.

I. Also check areas surrounding repaired locations.

J. Be careful that foreign objects (screws, solder

droplets, etc.) do not remain inside the set.

K. Crimp type wire connector

The power transformer uses crimp type connectors which connect the power cord and the primary side of the transformer. When replacing the transformer, follow these steps carefully and precisely to prevent shock hazards. Replacement procedure

1)Remove the old connector by cutting the wires at a point close to the connector.

Important: Do not re-use a connector. (Discard it.)

2)Strip about 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.

3)Align the lengths of the wires to be connected. Insert the wires fully into the connector.

4)Use a crimping tool to crimp the metal sleeve at its center. Be sure to crimp fully to the complete closure of the tool.

L. When connecting or disconnecting the internal con-

nectors, first, disconnect the AC plug from the AC outlet.

- 5 -

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to their original positions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm specified clearance distance (d) and (d’) between soldered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)

Table 1 : Ratings for selected area

AC Line Voltage Clearance Distance (d) (d’)

Chassis or Secondary Conducto

Primary Circuit Terminals

dd'

120 V

Note: This table is unofficial and for reference only.

Be sure to confirm the precise values.

2. Leakage Current Test

Confirm the specified (or lower) leakage current between B (earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the specified value in the table below.

Measuring Method (Power ON) :

Insert load Z between B (earth ground, power cord plug prongs) and exposed accessible parts. Use an AC voltmeter to measure across the terminals of load Z. See Fig. 2 and the following table.

Table 2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i) Earth Ground (B) to:

120 V

3.2mm (0.126 inches)

≥

0.15µF CAP. & 1.5kΩ RES. Connected in parallel

Exposed Accessible Part

1.5k

i≤0.5mA Peak Exposed accessible parts

0.15 F

Earth Ground

Power Cord Plug Prongs

AC Voltmeter (High Impedanc

Fig. 1

Fig. 2

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

- 6 -

STANDARD NOTES FOR SERVICING

Circuit Board Indications

a. The output pin of the 3 pin Regulator ICs is indi-

cated as shown.

Top View

b. For other ICs, pin 1 and every fifth pin are indicated

as shown.

Input

in 1

c. The 1st pin of every male connector is indicated as

shown.

in 1

Bottom View

How to Remove / Install Flat Pack-IC

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:.

(1) Prepare the hot-air flat pack-IC desoldering

machine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1)

Fig. S-1-1

(2) Remove the flat pack-IC with tweezers while apply-

ing the hot air.

(3) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(1) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Instructions for Connectors

1. When you connect or disconnect the FFC (Flexible Foil Connector) cable, be sure to first disconnect the AC cord.

2. FFC (Flexible Foil Connector) cable should be inserted parallel into the connector, not at an angle.

FFC Cable

Connector

CBA

* Be careful to avoid a short circuit.

Caution:

1. Do not supply hot air to the chip parts around the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. S-1-2)

2. The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it.

Hot-air Flat Pack-IC Desoldering

CBA

Masking Tape

Tweezers

Machine

Flat Pack-IC

Fig. S-1-2

- 7 -

With Soldering Iron:

F S

(1) Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)

lat Pack-IC

Desoldering Braid

(4) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(5) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Note:

When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.

Soldering Iron

Hot Air Blower

Fig. S-1-3

(2) Lift each lead of the flat pack-IC upward one by

one, using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering

Iron Wire

machine. (Fig. S-1-4)

Soldering Iron

To Solid Mounting Point

Fig. S-1-5

Sha Pin

ine Tip oldering Iron

CBA

Fine Tip Soldering Iro

Fig. S-1-4

(3) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Tweezers

Flat Pack-IC

With Iron Wire:

(1) Using desoldering braid, remove the solder from all

Fig. S-1-6

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)

(2) Affix the wire to a workbench or solid mounting

point, as shown in Fig. S-1-5.

(3) While heating the pins using a fine tip soldering

iron or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. S-1-5

- 8 -

2. Installation

P i

(1) Using desoldering braid, remove the solder from

the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily.

(2) The “I” mark on the flat pack-IC indicates pin 1.

(See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S-1-8.)

(3) Solder all pins of the flat pack-IC. Be sure that none

of the pins have solder bridges.

Example :

in 1 of the Flat Pack-IC

s indicated by a " " mark.

Fig. S-1-7

Instructions for Handling Semi-conductors

Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

2. Ground for Workbench

(4) Be sure to place a conductive sheet or copper plate

with proper grounding (1MΩ) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing.

< Incorrect >

CBA

Presolder

Flat Pack-IC

Fig. S-1-8

CBA

< Correct >

Grounding Ban

1MΩ

CBA

1MΩ

Conductive Sheet or Copper Plate

- 9 -

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally.

[1] Top Cover

[9] Power SW CBA

[7] Relay CBA

[8] Sensor CBA

[12] Loading Pulley

[13] Slide Tray Gear (B)

[14] Slide Tray Gear (A)

[15] Motor Assembly

[16] Switch CBA

[17] Tray Guide (R)

[6] Front CBA

[21] Progressive CBA Unit

[2] Front Assembly

[3] Bracket (Top)

[4] Stopper Bracket L, R

[5] Drive Mecha Assembly

[10] Tray Guide (L)

[11] Tray Guide (R) Unit

[18] Power Supply CBA

[19] Changer CBA

[20] PRO PCB(A) Shield

[22]

Shield Assembly

[23] DVD Main CBA Unit

[24] Rear Panel

2. Disassembly Method

ID/

LOC.

No.

PART

Fig.

No.

[1] Top Cover D1 6(S-1) -

Front

[2]

[3]

Assembly Bracket

(Top)

D2 2(S-2), *8(L-1) 1-1

D3 *2(L-2) -

Stopper

[4]

Bracket

D3 4(S-3) -

L, R

Drive Mecha

[5]

Assembly

D4,

[6] Front CBA D4 *2(L-3), CN2002 -

REMOVAL

REMOVE/*UNHOOK/ UNLOCK/RELEASE/ UNPLUG/DESOLDER

CN101, CN3002

Note

2 2-1 2-2

ID/

LOC.

PART

No.

[7] Relay CBA D6

Sensor

[8]

CBA Power SW

[9]

CBA Tray

[10]

Guide (L) Tray

[11]

Guide (R) Unit

[12]

Pulley Slide Tray

[13]

Gear (B) Slide Tray

[14]

Gear (A) Motor

[15]

Assembly Switch

[16]

CBA Tray

[17]

Guide (R)

Fig.

No.

D6 CN5101, 2(S-5) -

D7 CN2103, (S-6) -

D7 6(S-7) -

D8 (S-9), Belt L -

D8 (S-10), *(P-1) -

D8 ---------- -

D8 (S-11) -

D8 *2(L-4) -

D8 ---------- -

REMOVAL

REMOVE/*UNHOOK/ UNLOCK/RELEASE/ UNPLUG/DESOLDER

2(S-4), CN5002, CN5005

8(S-8), CN3004, CN3006

Note

Power

[18]

Supply

D9 CN1002, 3(S-12) -

CBA

Changer

[19]

CBA

PRO PCB(A)

[20]

Shield Progressive

[21]

CBA Unit Shield

[22]

Assembly DVD Main

[23]

CBA

6(S-13), 5(S-14),

CN1601, CN1602, CN1001, CN3001

D10 3(S-15) -

D10 CN1801 -

D10 ---------- -

[24] Rear Panel D11 4(S-17) -

↓

(1)

↓

(2)

↓

(3)

↓

(4)

↓

(5)

(1): Identification (location) No. of parts in the figures (2): Name of the part (3): Figure Number for reference (4): Identification of parts to be removed, unhooked,

unlocked, released, unplugged, unclamped, or desoldered. P=Spring, L=Locking Tab, S=Screw, CN=Connector

- 10 -

*=Unhook, Unlock, Release, Unplug, or Desolder e.g. 2(S-2) = two Screws (S-2), 2(L-2) = two Locking Tabs (L-2)

(5): Refer to “Reference Notes.”

(L-1)

(S-2)

(B)

Reference Notes

CAUTION 1: Locking Tabs (L-1) are fragile. Be careful not to break them.

1-1. To release eight Locking Tabs (L-1), first release

five Locking Tabs (A), and then three Locking Tabs (B). (Fig. D2)

CAUTION 2: Electrostatic breakdown of the laser diode in the optical system block may occur as a potential difference caused by electrostatic charge accumulated on cloth, human body etc, during unpacking or repair work.

To avoid damage of pickup follow next procedures.

2-1. Slide out the pickup unit as shown in Fig. D5.

2-2. Short the three short lands of FPC cable with sol-

der before removing the FFC cable (CN101) from it. If you disconnect the FFC cable (CN101), the laser diode of pickup will be destroyed. (Fig. D5)

CAUTION 3: When reassembling, confirm the FFC cable (CN101) is connected completely. Then remove the solder from the three short lands of FPC cable. (Fig. D5)

CAUTION 4: Before reinstalling, turn the Slide Tray Gear (B) fully clockwise. (Fig. D4)

(L-1)

[2] Front Assembly

[4] Stopper Bracket L

(L-2)

(A)

(S-2)

(L-1)

(B)

[3] Bracket (Top)

[4] Stopper Bracket R

(S-3)

(L-1)

Fig. D2

(S-3)

(S-1)

[1] Top Cover

(S-1)

Fig. D1

(S-1)

(S-3)

Slide Tray Gear (B)

CN2102

(L-3)

Turn

(L-3)

[6] Front CBA

(L-2)

Fig. D3

[5] Drive Mecha Assembly

CN101

CN3002

- 11 -

Fig. D4

Drive Mecha Assembly

CN5101

Slide

Short the three short lands by soldering

View for A

Short the three short lands by soldering

[8] Sensor CBA

(S-7)

CN2103

(S-5)

CN5005

[10] TrayGuide (L)

(S-4)

(S-7)

CN5002

[7] Relay CBA

Fig. D6

(S-8)

Pickup Unit

View for B

View for C

Fig. D5

- 12 -

(S-6)

[9] Power SW CBA

[11] TrayGuide (R)Unit

CN3006

CN3004

Fig. D7

[14] Slide Tray Gear (A)

)

[16] Switch CBA

(S-15) (S-15)

Belt L

[12] Loading Pulley

(S-11)

(S-12)

(S-9)

(P-1)

(S-10)

[17] Tray Guide (R

(L-4)

[13] Slide Tray Gear (B)

[15] Motor Assembly

[18] Power Supply CBA

(S-13)

[19] Changer CBA

(S-13)

Fig. D8

[20] PRO PCB(A) Shield

CN1801

[21] Progressive CBA Unit

(S-16)

[22] Shield Assembly

(S-16)

[23] DVD Main CBA Unit

CN2100

(S-13)

CN1602

CN1001

CN3001

CN1601

Fig. D10

(S-14)

(S-17)

[24] Rear Panel

Fig. D9

Fig. D11

- 13 -

FLOW CHART NO.1

The power cannot be turned on.(1)

TROUBLESHOOTING

Is the fuse normal?

Yes Is normal state restored when once unplugged power cord is plugged again after several seconds?

Yes Is the EV 5V line voltage normal?

Yes Is the voltage of secondary side normal?

FLOW CHART NO.2

The power cannot be turned on.(2)

Does the change from STANDBY LED indicate turn-off?

Yes

Is the voltage of 3.3V supplied to Q2021?

Yes

Is the voltage of 5V supplied to pin(3) of IC2001?

Yes

Is the "H" signal inputted to the base of Q2021, when the POWER button activated on the DVD?

Yes

Is the "H" signal inputted at base of Q2021, when the POWER button activated on the remote control unit?

Yes

Replace Q2021.

See FLOW CHART No.3 <The fuse blows out.>

Check if there is any leak or shor-circuit on the primary circuit component? (Q1001, Q1003,T1001, D1001, D1002, D1004, D1005, D1011, C1003, C1005)

Check each rectifying circuit of secondary circuit.

Check the EV 3.3V line.

Check the IC2001.

Check the POWER button line.

Check the line between the remote control receiver and Pin(26) of CN1001.

The STANDBY LED indicate is flashing after 0.5 sec.

Yes (below, confirmed operating at LED turn-off of 0.5 sec. interval.)

Are the "P-ON-H" pulse outputted from the pin(20) of CN1001?

Yes

Is the P-CON switch circuit operated normally? (Q1002, Q1005, Q1006, IC1002, D1036, D1046)

FLOW CHART NO.3

The fuse blows out.

Check the presence that the primary component is leaking or short then service it if defective.

After servicing, replace the fuse.

Replace the DVD Main CBA Unit.

Check each component, and replace.

Check the presence that the rectifying diode or circuit is shorted in each rectifying circuit of secondary side then service it if defective.

- 14 -

FLOW CHART NO.4

When the output voltage fluctuates.

Does the photo coupler circuit on the secondary side operate normally?

Yes

Does the photo coupler circuit on the primary side operate normally?

FLOW CHART NO.5

When buzz sound can be heard in the vicinity of the power circuit.

Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side (D1003, D1008, D1009, D1013, D1016, D1030, IC1002, Q1002, Q1004, Q1007, Q1011, Q1014)

FLOW CHART NO.6

The fluorescent display tube does not light.

Is the voltage of 5V supplied to Pins(6, 24) of IC2001?

Yes

Is the voltage of -24V supplied to Pin(15) of IC2001?

Yes

Is there 500kHz oscillation to Pin(26) of IC2001?

Yes

Check the signal lines of FP-DIN, FP-DOUT, FP-CLK, FP-STB of IC2001 and CN1001?

Yes

Are the filament voltage applied between (1, 2) and (34, 35) of the fluorescent display tube? Also negative voltage applied between these pins and GND?

Yes

Replace the fluorescent display tube.

Check the circuit and replace the parts. (IC1001, IC1006, D1048, D1015)

Check the circuit and replace the parts. (IC1001, D1012, D1024)

Check the EV 5V line.

Check the -FL (-24V) line.

Check R2001, IC2001 and their periphery.

Check or replace IC2001 and DVD Main CBA unit

Check or replace the power circuit, D1016, D1017 and R1042, and their periphery.

FLOW CHART NO.7

The key operation is not functioning.

Are the contact point and the installation state of the key switches(SW2201-2206, 2208-2212, 2214,

2215) normal? Yes

Is the control voltage normally supplied to Pins(3, 4, 7, 8, 9, 10, 11, 12, 13) of IC2001?

- 15 -

Check the key switches ( 2214, 2215

), and their periphery circuit.

SW2201-2206, 2208-2212

FLOW CHART NO.8

No operation is possible from the remote control unit.

Operation is possible from the DVD, but no operation is possible from the remote control unit.

Yes Is no operation possible if replacing the remote control unit?

Yes

Is 5V voltage supplied to Pin(3) terminal of infrared remote control receiver?

Yes

Is the "L" pulse sent out from Pin(1) terminal of the receiver when the infrared remote control is activated?

Yes

Is the "L" pulse signal supplied to Pin(26) of CN1001 from Pin(1) of receiver? (Be operated by SEARCH(-), SEARCH(+), PLAY, STILL/PAUSE, STOP, POWER and OPEN/CLOSE button.)

FLOW CHART NO.9

PON 12V is not outputted.

Yes

Original remote control unit is poor.

Check EV 5V line.

Replace the infrared remote control receiver.

Check the line between the infrared remote control receiver and Pin(26) of CN1001.

Replace DVD Main CBA unit.

Is PON12V voltage supplied to the collector of Q1002?

Yes

Does the P-ON switch circuit operate normally? (Q1005, Q1006, D1036, etc.)

Yes

Replace Q1002.

FLOW CHART NO.10

PON 5V is not outputted. (PON 12V is outputted normally.)

Is 5V voltage supplied to the collector of Q1004?

Yes

Is the "H" pulse inputted into the base of Q1004?

Yes

Replace Q1004.

FLOW CHART NO.11

-FL is not outputted.

Is -24V voltage supplied to the anode of D1003?

Yes Check if there is any leak or short-circuit on the loaded circuit.

Check D1009, C1012 and the periphery circuit.

Check each component, and replace.

Check D1030, D1048, C1035, C1048 and the periphery circuit.

Check D1046 and the periphery circuit.

Check D1003 and periphery circuit.

FLOW CHART NO.12

PON 3.3V is not outputted.

Is 3.3V voltage supplied to the emitter of Q1011?

Yes Does the P-CON switch circuit operate normally? (Q1005, Q1006, etc.)

Yes Replace Q1011.

Check D1008, D1015, C1007, C1038 and the periphery circuit.

Check each component, and replace.

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