Denon DVM-2845CI Service Manual

Ver. 2

Please refer to the MODIFICATION NOTICE.

SERVICE MANUAL

MODEL JP E3 E2 EK E2A E1C E1K EUT

DVM-2845CI

DVD AUDIO-VIDEO AUTO CHANGER

注意

サービスをおこなう前に、このサービスマニュアルを必ずお読みください。本機は、火災、感電、けがなどに対する安全性を確保するために、さまざまな配慮をおこなっており、また法的には「電気用品安全法」にもとづき、所定の許可を得て製造されております。従ってサービスをおこなう際は、これらの安全性が維持されるよう、このサービスマニュアルに記載されている注意事項を必ずお守りください。

●

For purposes of improvement, specifications and design are subject to change without notice.

●

Please use this service manual with referring to the operating instructions without fail.

●

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

Denon Brand Company, D&M Holdings lnc.

●

本機の仕様は性能改良のため、予告なく変更することがあります。

●

補修用性能部品の保有期間は、製造打切後 8 年です。

●

修理の際は、必ず取扱説明書を参照の上、作業を行ってください。

●

本文中に使用しているイラストは、説明の都合上現物と多少異なる場合があります。

TOKYO, JAPAN

X0334V.02 DE/CDM 0704

SAFETY PRECAUTIONS

The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK

Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective.

LASER RADIATION

Caution - Class 1M visible and invisible laser radiation when open. Do not view directly with optical instruments.

DVM-2845CI

CAUTION

Please heed the points listed below during servicing and inspection.

◎ Heed the cautions!

Spots requiring particular attention when servicing, such as the cabinet, parts, chassis, etc., have cautions indicated on labels or seals. Be sure to heed these cautions and the cautions indicated in the handling instructions.

◎ Caution concerning electric shock!

(1) An AC voltage is impressed on this set, so touching inter-

nal metal parts when the set is energized could cause electric shock. Take care to avoid electric shock, by for example using an isolating transformer and gloves when servicing while the set is energized, unplugging the power cord when replacing parts, etc.

(2)There are high voltage parts inside. Handle with extra care

when the set is energized.

◎

Caution concerning disassembly and assembly!

Though great care is taken when manufacturing parts from sheet metal, there may in some rare cases be burrs on the edges of parts which could cause injury if fingers are moved across them. Use gloves to protect your hands.

◎ Only use designated parts!

The set's parts have specific safety properties (fire resistance, voltage resistance, etc.). For replacement parts, be sure to use parts which have the same properties. In particular, for the important safety parts that are marked ! on wiring diagrams and parts lists, be sure to use the designated parts.

◎ Be sure to mount parts and arrange the

wires as they were originally!

For safety reasons, some parts use tape, tubes or other insulating materials, and some parts are mounted away from the surface of printed circuit boards. Care is also taken with the positions of the wires inside and clamps are used to keep wires away from heating and high voltage parts, so be sure to set everything back as it was originally.

◎ Inspect for safety after servicing!

Check that all screws, parts and wires removed or disconnected for servicing have been put back in their original positions, inspect that no parts around the area that has been serviced have been negatively affected, conduct an insulation check on the external metal connectors and between the blades of the power plug, and otherwise check that safety is ensured.

(Insulation check procedure) Unplug the power cord from the power outlet, disconnect the antenna, plugs, etc., and turn the power switch on. Using a 500V insulation resistance tester, check that the insulation resistance between the terminals of the power plug and the externally exposed metal parts (antenna terminal, headphones terminal, microphone terminal, input terminal, etc.) is 1MΩ or greater. If it is less, the set must be inspected and repaired.

CAUTION

Many of the electric and structural parts used in the set have special safety properties. In most cases these properties are difficult to distinguish by sight, and using replacement parts with higher ratings (rated power and withstand voltage) does not necessarily guarantee that safety performance will be preserved. Parts with safety properties are indicated as shown below on the wiring diagrams and parts lists is this service manual. Be sure to replace them with parts with the designated part number.

(1) Schematic diagrams ... Indicated by the ! mark.

(2) Parts lists ... Indicated by the ! mark.

Concerning important safety parts

Using parts other than the designated parts could result in electric shock, fires or other dangerous situations.

注意

サービス、点検時にはつぎのことにご注意願います。

◎注意事項をお守りください！

サービスのとき特に注意を必要とする個所についてはキャビネット、部品、シャーシなどにラベルや捺印で注意事項を表示しています。これらの注意書きおよび取扱説明書などの注意事項を必ずお守りください。

◎感電に注意！

(1) このセットは、交流電圧が印加されていますので通電時

に内部金属部に触れると感電することがあります。従って通電サービス時には、絶縁トランスの使用や手袋の着用、部品交換には、電源プラグを抜くなどして感電にご注意ください。

(2) 内部には高電圧の部分がありますので、通電時の取扱に

は十分ご注意ください。

◎分解、組み立て作業時のご注意！

板金部品の端面の『バリ』は、部品製造時に充分管理をしておりますが、板金端面は鋭利となっている箇所が有りますので、部品端面に触れたまま指を動かすとまれに怪我をする場合がありますので十分注意して作業して下さい。手の保護のために手袋を着用してください。

◎指定部品の使用！

セットの部品は難燃性や耐電圧など安全上の特性を持ったものとなっています。従って交換部品は、使用されていたものと同じ特性の部品を使用してください。特に配線図、部品表に!印で指定されている安全上重要な部品は必ず指定のものをご使用ください。

◎部品の取付けや配線の引きまわしは、

元どおりに！

安全上、テープやチューブなどの絶縁材料を使用したり、プリント基板から浮かして取付けた部品があります。また内部配線は引きまわしやクランパーによって発熱部品や高圧部品に接近しないように配慮されていますので、これらは必ず元どおりにしてください。

◎サービス後は安全点検を！

サービスのために取り外したねじ、部品、配線などが元どおりになっているか、またサービスした個所の周辺を劣化させてしまったところがないかなどを点検し、外部金属端子部と、電源プラグの刃の間の絶縁チェックをおこなうなど、安全性が確保されていることを確認してください。

（絶縁チェックの方法）

電源コンセントから電源プラグを抜き、アンテナやプラグなどを外し、電源スイッチを入れます。500V 絶縁抵抗計を用いて、電源プラグのそれぞれの端子と外部露出金属部［アンテナ端子、ヘッドホン端子、マイク端子、入力端子など］との間で、絶縁抵抗値が１ MΩ 以上であることを確認してください。この値以下のときはセットの点検修理が必要です。

注意

本機に使用している多くの電気部品、および機構部品は安全上、特別な特性を持っています。この特性はほとんどの場合、外観では判別つきにくく、またもとの部品より高い定格（定格電力、耐圧）を持ったものを使用しても安全性が維持されるとは、限りません。安全上の特性を持った部品は、このサービスマニュアルの配線図、部品表につぎのように表示していますので必ず指定されている部品番号のものを使用願います。

(1) 配線図…!マークで表示しています。 (2) 部品表…!マークで表示しています。

安全上重要な部品について

指定された部品と異なるものを使用した場合には、感電、火災などの危険を生じる恐れがあります。

DVM-2845CI

SPECIFICATIONS

Item Conditions Unit Nominal Limit

1. Video Output 75 Ω load Vpp 1.0 ± 0.1

2. Optical Digital Out dBm -18

3. Audio (PCM) 3-1. Output Level 1 kHz, 0 dB Vrms 2.0 3-2. S/N dB 120 3-3. Freq. Response DVD fs = 48 kHz, 20 Hz ~ 22 kHz dB ± 0.5 CD fs = 44.1 kHz, 20 Hz ~ 20 kHz dB ± 0.5 3-4. THD+N DVD 1 kHz, 0 dB % 0.003 CD 1 kHz, 0 dB % 0.003

Notes:

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

2. Power supply: AC 120 V, 60 Hz

3. Load Impedance: 100 kΩ load (Audio Output)

4. Room Ambient: 5 °C - 40 °C

DVM-2845CI

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

Chassis or Secondary Conductor

Primary Circuit

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

120 V ≥ 3.2 mm (0.126 inches)

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.

d' d

Fig. 1

Exposed Accessible Part

AC Voltmeter (High Impedance)

Earth Ground

Power Cord Plug Prongs

Table 2: Leakage current ratings for selected areas

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

120 V

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

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

i ≤ 0.5 mA Peak Exposed accessible parts

Fig. 2

DVM-2845CI

STANDARD NOTES FOR SERVICING

Circuit Board Indications

1. The output pin of the 3 pin Regulator ICs is indicated as shown.

Top View

Out

2. For other ICs, pin 1 and every fifth pin are indicated as shown.

Pin 1

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

Pin 1

Input

Bottom View

Pb (Lead) Free Solder

When soldering, be sure to use the Pb free solder.

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

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.

2. Remove the flat pack-IC with tweezers while applying 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)

4. Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6)

CAUTION:

1. The Flat Pack-IC shape may differ by models. Use an appropriate hot-air flat pack-IC desoldering machine, whose shape matches that of the Flat Pack-IC.

2. 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)

DVM-2845CI

3. 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

With Soldering Iron:

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)

Flat Pack-IC

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 machine. (Fig. S-1-4)

Desoldering Braid

Soldering Iron

Fig. S-1-3

Sharp Pin

Fine Tip Soldering Iron

4. Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6)

Fig. S-1-4

DVM-2845CI

With Iron Wire:

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)

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.

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 tweezers. (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.

Hot Air Blower

2. Installation

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 “●” 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 :

Pin 1 of the Flat Pack-IC is indicated by a " " mark.

Fig. S-1-7

To Solid Mounting Point

CBA

Tweezers

Iron Wire

Soldering Iron

Fig. S-1-5

Fine Tip Soldering Iron

Flat Pack-IC

Presolder

Flat Pack-IC

CBA

Fig. S-1-8

Fig. S-1-6

Instructions for Handling Semiconductors

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 (1 MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

2. Ground for Workbench

Be sure to place a conductive sheet or copper plate with proper grounding (1 MΩ) 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.

DVM-2845CI

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or Copper Plate

CABINET DISASSEMBLY INSTRUCTIONS

DVM-2845CI

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

[7] Power SW CBA

[11] Tray Guide (L)

[13] Loading Pulley

[14] Slide Tray Gear (B)

[15] Slide Tray Gear (A)

[16] Motor Assembly

[17] Switch CBA

[18] Tray Guide (R)

[6] Function CBA

[2] Front Assembly

[3] Bracket (Top)

[4] Stopper Bracket L, R

[5] Slide Tray Assembly

[8] Rear Panel

[9] Interface CBA

[10] D Sub Holder

[12] Tray Guide (R) Unit

[19] Changer CBA

[20] AV CBA

[21] DVD Main CBA Unit

[22] PCB Holder

2. Disassembly Method

ID/

LOC.

No.

PAR T

Fig.

No.

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

Front

[2]

[3]

Assembly Bracket

(Top)

D2 *8(L-1) 1

D3 2(S-2) -

Stopper

[4]

Bracket

D3 4(S-3) -

L, R

REMOVAL

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

Note

ID/

LOC.

No.

[5]

PAR T

Slide Tray Assembly

REMOVE/*UNHOOK/

Fig.

UNLOCK/RELEASE/

No.

UNPLUG/DESOLDER

CN5001, CN5004

Note

2 3 4

[6] Function CBA D4 *2(L-2), CN2201 -

REMOVAL

Power SW

[7]

CBA

[8] Rear Panel D6

D4 CN2103, (S-4) -

4(S-5), 13(S-6), (S-7), 2(S-8)

[9] Interface CBA D7 *3(L-3), CNF02 -

[10] D Sub Holder D7 ---------- -

Tr ay

[11]

Guide (L) Tr ay

[12]

Guide (R) Unit

[13]

Pulley Slide Tray

[14]

Gear (B) Slide Tray

[15]

Gear (A) Motor

[16]

Assembly Switch

[17]

CBA Tr ay

[18]

Guide (R)

[19] Changer CBA D9

[20] AV CBA D9

DVD Main

[21]

CBA Unit

D7 (S-9) -

(S-10), CN3003,

CN3004

D8 (S-11), Belt L -

D8 (S-12), *(P-1) -

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

D8 (S-13) -

D8 *2(L-4) -

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

CN3102, CN3301, 2(S-14)

5(S-15), CN1001, CN1601, CN1602

D10 3(S-16) -

[22] PCB Holder D10 ---------- -

↓

(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 *=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.”

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. To remove the Chuck Arm, remove the Screw A,

two Rotary Tray Washers and Rotary Tray Spring. (Fig. D5)

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

der before removing the FFC cable (CN5004 on the Relay CBA). If you disconnect the FFC cable, the laser diode of pickup will be destroyed. (Fig. D5)

2-3. Disconnect Connector (CN5001). Remove the

Drive Mechanism carefully. (Fig. D5)

CAUTION 3: When reassembling, confirm the three short lands of FPC cable is solderd and confirm the FFC cable (CN5004 on the Relay CBA) 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

(S-2)

(B)

(L-1)

(A)

[4] Stopper Bracket L

(S-3)

(L-1)

(B)

(L-1)

[4] Stopper Bracket R

[3] Bracket (Top)

(S-2)

(S-3)

DVM-2845CI

Fig. D2

(S-3)

Fig. D3

(S-1)

[1] Top Cover

(S-1)

Fig. D1

DVM-2845CI

CN2103

(S-4)

[7] Power SW CBA

CN2201

(L-2)

[5] Slide Tray Assembly

Turn

(L-2)

[6] Function CBA

Slide Tray Gear (B)

Fig. D4

Screw A

Rotary tray washer Rotary tray spring Rotary tray washer

Chuck arm

Short the three short lands by soldering. (Either of two places.)

Slide Tray Assembly

FPC Cable

CN5004 FFC cable from the DVD Main CBA Unit

View for B (Relay CBA)

View for A

Relay CBA

CN5001

FFC cable from the Changer CBA

Fig. D5

DVM-2845CI

[8] Rear Panel

[10] D Sub Holder

[11] Tray Guide (L)

(S-9)

(S-5)

(S-6)

(S-5)

(S-6)

[9] Interface CBA

(L-3)

(S-5)

(S-6)

(S-5)

Fig. D6

(S-8)

(S-6)

(S-8)

(S-7)

[14] Slide Tray Gear (B)

[15] Slide Tray Gear (A)

(S-11)

Belt L

[13] Loading Pulley

(S-15)

(S-13)

(S-15)

(S-12)

(P-1)

[17] Switch CBA

[18] Tray Guide (R)

(L-4)

[16] Motor Assembly

Fig. D8

[20] AV CBA

CN3003

CN3004

(S-10)

CNF02

[12] Tray Guide (R) Unit

Fig. D7

(S-14)

CN3102

CN3301

CN1602

CN1601

CN1001

(S-14)

[19] Changer CBA

Fig. D9

[21]

DVD Main

CBA Unit

DVM-2845CI

(S-16)

[22] PCB Holder

Fig. D10

DVM-2845CI

SLIDE TRAY ASSEMBLY DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

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

[1] Chuck Arm

[2] Rotary Tray

[9] Detector Switch

[6] Belt L

[3] Plate Holder 2

[4] Plate Holder 3

[7] Gear Plate

[8] Mecha Cable

[11] Relay CBA + Sensor CBA

[14] Mecha Holder Assembly

[15] Motion Gear

[17] Rotary Tray Gear

[18] Idler Gear

[19] Idler Pad

[5] Plate Spring

[10] Rotary Motor Assembly

[16] Loading Pulley

[12] Slot Lever

[13] Rotary Stopper

[20] Idler Arm

[21] Slide Tray Chassis

DVM-2845CI

2. Disassembly Method

ID/

LOC

.No.

[1] Chuck Arm MD1

[2] Rotary Tray MD2 ----------

[3] Plate Holder 2 MD3 2(S-2), (S-3) [4] Plate Holder 3 MD3 2(S-4) [5] Plate Spring MD4 (S-5) [6] Belt L MD4 ---------- [7] Gear Plate MD4 3(S-6), (S-7) -

[8] Mecha Cable MD4

[9]

[10]

[11]

[12] Slot Lever MD6 *(P-2)

[13]

[14]

[15] Motion Gear MD6 ----------

[16]

[17]

[18] Idler Gear MD7

[19] Idler Pad MD7 ---------- [20] Idler Arm MD7 ---------- -

[21]

↓

(1)

(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,

(5): Refer to “Reference Notes.”

PA RT

Detector Switch

Rotary Motor Assembly

Relay CBA + Sensor CBA

Rotary Stopper

Mecha Holder Assembly

Loading Pulley

Rotary Tray Gear

Slide Tray Chassis

↓

(2)

unlocked, released, unplugged, unclamped, or desoldered. P=Spring, L=Locking Tab, S=Screw, CN=Connector, W=Washer *=Unhook, Unlock, Release, Unplug, or Desolder e.g. 2(S-2) = two Screws (S-2), 2(L-2) = two Locking Tabs (L-2)

Fig.

No.

MD4 Desolder 3

MD5

MD6 ----------

MD5 MD6

MD7 (S-10), (W-2) -

MD7 ---------- -

↓

(3)

REMOVAL

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

(S-1), 2(W-1), (P-1), Magnet, Yoke, Clamper

6(L-1), *CN5002, *CN5101, (S-8) Lead clamper, Desolder

4(S-9), *CN5003, *CN5005

----------

*(P-3), (S-11), (W-3), (W-4)

↓

(4)

Note

1 2

4 5

6 7

4 5 8 9

8 9

↓

(5)

Reference Notes

1. Disassembly note Slide the Rotary Tray slowly in the direction of the front while rotating it.

2. Reassembly note Align the rails on the Rotary Tray with the slot on

the sensor and align pin A with hole A on the Rotary Tray.

3. Reassembly note Re-solder the leads on the Rotary Motor Assembly or the Detector Switch as shown in Fig. MD4.

4. CAUTION: 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: a. Short the three short lands of the FPC cable

with solder before removing the FFC cable (CN5005). If you disconnect the FFC cable (CN5005) without shorting them, the laser diode of the pickup will be destroyed. (“View for A” in Fig. MD5)

b. Disconnect the two connectors (CN5003 and

CN5005) on the Relay CBA.

5. CAUTION: When Reassembly, confirm the FFC cable (CN5005) is connected completely. Then remove the solder from the three short lands of the FPC cable. (“View for A” in Fig. MD5)

6. Disassembly note Remove the spring (P-2). Then remove the Slot Lever with the Rotary Stopper while turning the Slot Lever in the direction of the arrow as shown in Fig. MD6.

7. Reassembly note a. Install the Slot Lever and the Rotary Stopper

with spring (P-2) as shown in “Bottom View of the Slide Tray” of Fig. MD6.

b. Align pin B on the Slot Lever with slot B on the

Motion Gear.

8. Disassembly note The Mecha Holder Assembly and the Motion Gear should be removed together.

9. Reassembly note The pins, slots or holes on the Mecha Holder Assembly, the Motion Gear and the Slide Tray align as follows:

• Pin C on the Mecha Holder Assembly with hole B

on the Slide Tray Chassis

• Pin D on the Mecha Holder Assembly with slot C

on the Motion Gear

• Pin E on the Mecha Holder Assembly with

cavity A on the Slide Tray Chassis

• Slot A on the Mecha Holder Assembly with rib A

on the Slide Tray Chassis

DVM-2845CI

(S-1)

[1] Chuck Arm

[2] Rotary Tray

(W-1)

Hole A

(P-1) Clamper (W-1)

Yoke

Magnet

Fig. MD1

Rails on the Rotary Tray

Slide Tray

Desolder

[9] Detector Switch

Desolder

[6] Belt L

(L-1)

(S-6)

(S-7)

(L-1)

(S-6)

(S-5)

[8] Mecha Cable

(S-8)

[10] Rotary Motor Assembly

[7] Gear Plate

(S-6)

[5] Plate Spring

Lead clamper

CN5002

[3] Plate Holder 2

(S-2)

(S-4)

(S-3)

Slot on the sensor

Pin A

(S-4)

[4] Plate Holder 3

Fig. MD2

Fig. MD3

CN5101

[8] Mecha Cable

(L-1)

Bottom View of the Slide Tray

Detector Switch DC Mini Motor

yellow

black

blue

red

brown

Fig. MD4

DVM-2845CI

CN5003CN5005

(S-9)

[11] Relay CBA + Sensor CBA

(S-9)

Bottom View of the Slide Tray

Slide Tray

[15] Motion Gear

Slot B

Pin D

Slot A

Slot C

[13] Rotary Stopper

Slot A

Pin D

[14] Mecha Holder Assembly

Pin B

turn

[12] Slot Lever

Pin C

Pin E

(P-2)

Pin E

Slide Tray

Short the three short lands by soldering. (Either of two places.)

FPC Cable

View for A

Fig. MD5

Pin C

Bottom View of the Mecha Holder Assembly

Rib A

Hole B

[12] Slot Lever

[13] Rotary Stopper

(P-2)

Cavity A

Bottom View of the Slide Tray

Fig. MD6

DVM-2845CI

[20] Idler Arm

[17] Rotary Tray Gear

[21] Slide Tray Chassis

[19] Idler Pad

[18] Idler Gear

(P-3) (W-3) (W-4)

(S-11)

[16] Loading Pulley

(W-2)

(S-10)

Fig. MD7

TROUBLESHOOTING

FLOW CHART NO.1

The power cannot be turned on.

Is the fuse normal?

Ye s

Is normal state restored when once unplugged

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

power cord is plugged again after several seconds?

Ye s

Is the CHG +3.3V line voltage normal?

Ye s

Is each voltage of the secondary side normal?

Ye s

When pressing POWER button (SW2101), is the

When pressing POWER button (SW2101), is the voltage of 0V supplied to pin(42) of IC3001?

voltage of 0V supplied to pin(42) of IC3001?

Ye s

Is the voltage of 3.3V supplied to pin(1) of IC3001?

Ye s

Replace IC3001.

DVM-2845CI

See FLOW CHART No.2 <The fuse blows out.>

Check if there is any leak or shor-circuiting on the

Check if there is any leak or shor-circuiting on the primary circuit component, and service it if defective.

primary circuit component, and service it if defective. (Q1001, Q1003, T1001, D1001, D1002, D1004,

(Q1001, Q1003, T1001, D1001, D1002, D1004, D1005, D1011, C1003, C1005)

D1005, D1011, C1003, C1005)

Check each rectifying circuit of the secondary circuit

Check each rectifying circuit of the secondary circuit and service it if defective.

and service it if defective.

Check POWER button (SW2101) and their

Check POWER button (SW2101) and their periphery, and service it if defective.

periphery, and service it if defective.

Check CHG+3.3V line

Check CHG+3.3V line See FLOW CHART No.2 <The fuse blows out.>

See FLOW CHART No.2 <The fuse blows out.>

and service it if defective.

FLOW CHART NO.2

The fuse blows out.

Check the presence that the primary component

Check the presence that the primary component is leaking or shorted and service it if defective.

is leaking or shorted and service it if defective.

After servicing, replace the fuse.

FLOW CHART NO.3

When the output voltage fluctuates.

Does the photo coupler circuit on the secondary

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

side operate normally?

Ye s

Check IC1001, D1012, D1024 and their periphery,

Check IC1001, D1012, D1024 and their periphery, and service it if defective.

and service it if defective.

FLOW CHART NO.4

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

Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side

(D1003, D1006, D1008, D1016, D1030, IC1003, Q1002, Q1004, Q1011, Q1014, Q1020)

and service it if defective.

(D1003, D1006, D1008, D1016, D1030, IC1003, Q1002, Q1004, Q1011, Q1014, Q1020)

Check the presence that the rectifying diode or

Check the presence that the rectifying diode or circuit is shorted in each rectifying circuit of

circuit is shorted in each rectifying circuit of secondary side, and service it if defective.

secondary side, and service it if defective.

Check IC1001, IC1006, D1015 and their

Check IC1001, IC1006, D1015 and their periphery, and service it if defective.

periphery, and service it if defective.

FLOW CHART NO.5

-FL is not outputted.

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

Ye s

Check if there is any leak or short-circuit

Check if there is any leak or short-circuit on the loaded circuit, and service it if defective.

on the loaded circuit, and service it if defective.

Check D1003 and periphery circuit, and service it

Check D1003 and periphery circuit, and service it if defective.

if defective.

FLOW CHART NO.6

P-ON+10V (EV+10V) is not outputted.

DVM-2845CI

Is 10V voltage supplied to the emitter of Q1002?

Ye s Is the voltage of base on Q1002 lower than the voltage of emitter on Q1002 when turning the power on?

Ye s Replace Q1002.

FLOW CHART NO.7

P-ON+5V is not outputted. (P-ON+10V is outputted normally.)

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

Ye s Replace Q1004.

FLOW CHART NO.8

P-ON+3.3V is not outputted. (P-ON+10V is outputted normally.)

Is 3.3V voltage supplied to the collector of Q1011?

Ye s Replace Q1011, R1066 and R1067.

Check D1030, C1035, C1048, L1009 and the periphery circuit, and service it if defective.

Check Q1016 and service it if defective.

Check R1068 and D1046, and service it if defective.

Check D1008, D1015, C1007, C1038, L1007 and the periphery circuit, and service it if defective.

FLOW CHART NO.9

CHG+5V is not outputted.

Is EV+10V outputted normally?

Ye s Check Q1014, D1047 and the periphery circuit, and service it if defective.

FLOW CHART NO.10

EV+1.2V is not outputted.

Is 2.9V voltage supplied to Pin(3) of IC1003?

Ye s

Replace IC1003.

FLOW CHART NO.11

EV+3.3V is not outputted.

Is 3.3V voltage supplied to emitter of Q1020?

Ye s

Is the "L" signal inputted to base of Q1012?

Ye s Check Q1012, Q1020, R1050 and R1088, and service it if defective.

Refer to "FLOW CHART NO.6" <P-ON+10V (EV+10V) is not outputted.>

Check D1006, C1014, C1050, L1008, Q1022 and the periphery circuit, and service it if defective.

Check D1008, D1015, C1007, C1038, L1007 and the periphery circuit, and service it if defective.

Is the "L" signal outputted into Pin(9) of IC3001?

Ye s No Check the circuit between Pin(9) of IC3001 and base of Q1012 and service it if defective.

Replace IC3001.

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