Denon DVD DVD-1930 User manual

SERVICE MANUAL
DVD AUDIO-VIDEO / SUPER AUDIO CD PLAYER
MODEL DVD-1930
TOKYO, JAPAN
Denon Brand Company, D&M Holdings Inc.
X0316V.02 DE/CDM 0610
Some illustrations using in this service manual are
slightly different from the actual set.
●
Please use this service manual with referring to the
operating instructions without fail.
●
For purposes of improvement, specifications and
design are subject to change without notice.
●
●
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。
●
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。
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。
●
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。
注 意
For Europe model
Please refer to the
MODIFICATION NOTICE.
Ver. 2
Please refer to the
MODIFICATION NOTICE.

2
DVD-1930
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 cau-
tions 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 ex-
ample 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 resis-
tance, voltage resistance, etc.). For replacement parts, be
sure to use parts which have the same properties. In particu-
lar, 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 insu-
lating 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 discon-
nected for servicing have been put back in their original posi-
tions, 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 re-
sistance between the terminals of the power plug and the ex-
ternally exposed metal parts (antenna terminal, headphones
terminal, microphone terminal, input terminal, etc.) is 1MΩor
greater. If it is less, the set must be inspected and repaired.
Concerning important safety parts
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 pre-
served. 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 designat-
ed part number.
(1) Schematic diagrams ... Indicated by the ! mark.
(2) Parts lists ... Indicated by the ! mark.
Using parts other than the designated parts
could result in electric shock, fires or other
dangerous situations.
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
Do not stare into beam or view directly with optical instruments, class 3A laser product.
CAUTION
CAUTION
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、この値以下の
ときはセットの点検修理が必要です。
安全上重要な部品について
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。
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。
注 意
注 意

3
DVD-1930
SPECIFICATIONS
Notes:
1. All Items are measured without pre-emphasis unless otherwise specified.
2. Power supply: AC 200 ~ 240 V, 50 Hz
3. Load Impedance: 100 kΩ load (Audio Output)
4. Room Ambient: 5 °C ~ 40°C
Item Conditions Unit Nominal Limit
1. Video Output 75 Ωload Vpp 1.0 ± 0.1
2. Coaxial Digital Out 75 Ωload mVpp 500 ± 50
3. Audio (PCM)
3-1. Output Level 1 kHz, 0 dB Vrms 2.0
3-2. S/N dB 115
3-3. Freq. Response
DVD fs = 48 kHz, 20 Hz ~ 22 kHz dB ± 1.0
CD fs = 44.1 kHz, 20 Hz ~ 20 kHz dB ± 1.0
3-4. THD+N
DVD 1 kHz, 0 dB % 0.004
CD 1 kHz, 0 dB % 0.004

4
DVD-1930
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 con-
firm 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 sol-
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
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 termi-
nals, 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.
AC Line Voltage Clearance Distance (d), (d’)
200 to 240 V ≥3 mm(d)
≥6 mm(d’)
Fig. 1
Chassis or Secondary Conductor
Primary Circuit
d' d
AC Voltmeter
(High Impedance)
Exposed Accessible Part
BOne side of
Power Cord Plug Prongs
Z
Fig. 2
Table 2: Leakage current ratings for selected areas
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage Load Z Leakage Current (i) One side of power cord plug
prongs (B) to:
200 to 240 V
2kΩ RES.
Connected in
parallel
i≤0.7mA AC Peak
i≤2mA DC
RF or
Antenna terminals
50kΩRES.
Connected in
parallel
i≤0.7mA AC Peak
i≤2mA DC A/V Input, Output

5
DVD-1930
STANDARD NOTES FOR SERVICING
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is
indicated as shown.
2. For other ICs, pin 1 and every fifth pin are
indicated as shown.
3. The 1st pin of every male connector is indicated as
shown.
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.
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)
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)
Top View
Out In
Bottom View
Input
5
10
Pin 1
Pin 1
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Fig. S-1-1

6
DVD-1930
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.
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)
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)
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)
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Tape
Fig. S-1-2
Flat Pack-IC Desoldering Braid
Soldering Iron
Fig. S-1-3
Fine Tip
Soldering Iron
Sharp
Pin
Fig. S-1-4

7
DVD-1930
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.
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.
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fig. S-1-5
Fine Tip
Soldering Iron
CBA
Flat Pack-IC
Tweezers
Fig. S-1-6
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark. Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8

8
DVD-1930
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 (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.
<Incorrect>
CBA
Grounding Band
Conductive Sheet or
Copper Plate
1MΩ
1MΩ
<Correct>
CBA

9
DVD-1930
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.
2. Disassembly Method
Note:
(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.”
About tightening screws
When tightening screws, tighten them with the
following torque.
ID/
Loc.
No.
Part
Removal
Fig.
No.
Remove/*Unhook/
Unlock/Release/
Unplug/Desolder
Note
[1] Top Cover D1 5(S-1) ---
[2] Front Unit D2 *4(L-1), *2(L-2),
*3(L-3), *CN2001 1
[3] Tray Panel D2 *2(L-4) 1
[4] Function
CBA D3 6(S-2) ---
[5] Front
Assembly D3 ---------- ---
[6] Reinforce
Plate D4 2(S-3) ---
[7] Rear Panel D4 9(S-4), (S-5), (S-6) 4
[8] DVD Main
CBA Unit D5
3(S-7), *CN201,
*CN301, *CN401,
*CN601, *CNS01
2
4
[9] 5.1ch Amp
CBA D6 (S-8), *2(L-5), *CN7101 ---
[10] Jack PCB
Holder D6 2(S-9) ---
[11] DVD
Mechanism
D5
D7 4(S-10) 2 3
[1] Top Cover
[5] Front Assembly
[2] Front Unit
[3] Tray Panel
[6] Reinforce Plate
[7] Rear Panel
[14] Loader Base
[16] Main PCB Holder
[8] DVD Main CBA Unit
[11] DVD Mechanism
[15] Power PCB Holder
[12] LED CBA
[4] Function CBA
[9] 5.1ch Amp CBA
[10] Jack PCB Holder
[13] AV CBA
[12] LED CBA D8 *CN2102 ---
[13] AV CBA D8 4(S-11), (S-12) ---
[14] Loader
Base D9 4(S-13) ---
[15] Power PCB
Holder D9 2(S-14) ---
[16] Main PCB
Holder D9 (S-15) ---
↓
(1)
↓
(2)
↓
(3)
↓
(4)
↓
(5)
Screws Torque
(S-1), (S-2), (S-3), (S-4),
(S-5), (S-6), (S-7), (S-8),
(S-9), (S-10), (S-11), (S12),
(S-13), (S-14), (S-15)
0.45 ± 0.05 N·m
ID/
Loc.
No.
Part
Removal
Fig.
No.
Remove/*Unhook/
Unlock/Release/
Unplug/Desolder
Note

10
DVD-1930
Reference Notes
1. CAUTION 1: Locking Tabs (L-1), (L-2), (L-3) and
(L-4) are fragile. Be careful not to break them.
1) Release four Locking Tabs (L-1), then release
two Locking Tabs (L-2).
2) Release three Locking Tabs (L-3).
3) Disconnect connector CN2001, then remove
the Front Unit.
2. 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.
1) Short the three short lands of FPC cable with
solder before removing the FFC cable (CN201)
from it. If you disconnect the FFC cable
(CN201), the laser diode of pickup will be
destroyed. (Fig. D5)
2) Disconnect Connectors (CN301), (CN401) and
(CN601). Remove three screws (S-7) and lift
the DVD Main CBA Unit. (Fig. D5)
3. CAUTION 3: When reassembling, confirm the
FFC cable (CN201) is connected completely. Then
remove the solder from the three short lands of
FPC cable. (Fig. D5)
4. CAUTION 4: When installing the DVD Main CBA
Unit with a screw, hold and press the DVD Main
CBA Unit to align the HDMI connector with the
connector’s hole for HDMI on the Rear Panel.
Fig. D1
[1] Top Cover
(S-1)
(S-1)
(S-1)
[2] Front Unit
[3] Tray Panel
CN2001
(L-1)
(L-1)
(L-2)
(L-2)
(L-4)
(L-4)
(L-3)
Fig. D2
[4] Function CBA
[5] Front Assembly
(S-2)
(S-2)
Fig. D3
[6] Reinforce
Plate
(S-3)
(S-3)
[7] Rear Panel
(S-6)
(S-4)
(S-4)
(S-5)
(S-4)
Fig. D4

11
DVD-1930
(S-7)
(S-7)
[8] DVD Main CBA Unit
CN401
CN301
A
Fig. D5
CN201
CN601
(S-7)
CNS01
Short the three short lands by soldering.
(Either of two places.)
View for A
FPC Cable
(S-8)
(S-9)
[10] Jack
PCB Holder
[9] 5.1ch Amp CBA
(L-5)
Fig. D6
CN7101
Fig. D7
[11] DVD
Mechanism
(S-10)
[13] AV CBA
[12] LED CBA
(S-11)
(S-11)
(S-12)
CN2102
Fig. D8
(S-11)

12
DVD-1930
3. How to Eject Manually
1. Remove the Top Cover.
2. Rotate the roulette in the direction of the arrow as shown below.
[14] Loader Base
[16] Main
PCB
Holder
(S-13)
Fig. D9
(S-13)
(S-15)
[15] Power
PCB Holder
(S-14)
A
View for A
Rotate this roulette in
the direction of the arrow

13
DVD-1930
HOW TO INITIALIZE THE DVD PLAYER
To put the program back at the factory-default,
initialize the DVD player as the following procedure.
1. Press [1], [2], [3], [4], and [DISPLAY] buttons on
the remote control unit in that order.
Fig. a appears on the screen.
2. Press [CLEAR] button on the remote control unit.
Fig. b appears on the screen.
When “OK” appears on the screen, the factory
default will be set. Then the firmware renewal
mode is complete.
3. To exit this mode, press [POWER OFF] button.
MODEL : *******
Version : *.**
Region : *
EXIT: POWEREEPROM CLEAR : CLEAR
Fig. a
"*******" differ depending on the models.
MODEL : *******
Version : *.**
Region : *
EEPROM CLEAR : OK
EXIT: POWEREEPROM CLEAR : CLEAR
"*******" differ depending on the models.
Fig. b

14
DVD-1930
FIRMWARE RENEWAL MODE
1. Turn the power on and remove the disc on the tray.
2. To put the DVD player into version up mode, press
[9], [8], [7], [6], and [SEARCH MODE] buttons on
the remote control unit in that order. The tray will
open automatically. Fig. a appears on the screen
and Fig. b appears on the VFD.
The DVD player can also enter the version up
mode with the tray open. In this case, Fig. a will be
shown on the screen while the tray is open.
3. Load the disc for version up.
4. The DVD player enters the F/W version up mode
automatically. Fig. c appears on the screen and
Fig. d appears on the VFD. If you enter the F/W for
different models, “Disc Error” will appear on the
screen, then the tray will open automatically.
The appearance shown in (*1) of Fig. c is
described as follows:
5. After programming is finished, the tray opens
automatically. Fig. e appears on the screen and
the checksum in (*2) of Fig. e appears on the VFD
(Fig. f).
At this time, no button is available.
6. Remove the disc on the tray.
7. Unplug the AC cord from the AC outlet. Then plug
it again.
8. Turn the power on by pressing the
[POWER ON] button and the tray will close.
9. Press [1], [2], [3], [4], and [DISPLAY] buttons on
the remote control unit in that order.
Fig. g appears on the screen.
10. Press [CLEAR] button on the remote control unit.
Fig. h appears on the screen.
When “OK” appears on the screen, the factory
default will be set. Then the firmware renewal
mode is complete.
11. To exit this mode, press [POWER OFF] button.
No. Appearance State
1 Reading... Sending files into the memory
2 Erasing... Erasing previous version data
3 Programming... Writing new version data
F/W Version Up Mode Model No : *******
VERSION : *.**
Please insert a DISC
for F/W Version Up.
EXIT: POWER
"*******" differ depending on the models.
Fig. a Version Up Mode Screen
Fig. b VFD in Version Up Mode
VERSION : ************.abd
Reading...
F/W Version Up Mode Model No : *******
VERSION : *.**
Fig. c Programming Mode Screen
"*******" differ depending on the models.
(*1)
Fig. d VFD in Programming Mode (Example)
VERSION : ************.abd
Completed
SUM : 7ABC
F/W Version Up Mode Model No : *******
VERSION : *.**
"*******" differ depending on the models.
Fig. e Completed Program Mode Screen
(*2)
Fig. f VFD upon Finishing the Programming Mode (Example)
MODEL : *******
Version : *.**
Region : *
EXIT: POWEREEPROM CLEAR : CLEAR
Fig. g
"*******" differ depending on the models.
MODEL : *******
Version : *.**
Region : *
EEPROM CLEAR : OK
EXIT: POWEREEPROM CLEAR : CLEAR
"*******" differ depending on the models.
Fig. h

15
DVD-1930
TROUBLESHOOTING
FLOW CHART NO.2
The fuse blows out.
After servicing, replace the fuse.
Check the presence that the primary component
is leaking or shorted and service it if defective.
Check the presence that the rectifying diode or
circuit is shorted in each rectifying circuit of
secondary side, and service it if defective.
FLOW CHART NO.3
When the output voltage fluctuates.
Ye s
No
FLOW CHART NO.4
When buzz sound can be heard in the vicinity of power circuit.
Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side ,
and service it if defective.
(D1003, D1006, D1008, D1016, D1030, IC1003, Q1002, Q1004, Q1005, Q1011, Q1014)
Does the photo coupler circuit on the secondary
side operate normally?
Check IC1001, D1012, D1024 and their periphery,
and service it if defective.
Check IC1001, IC1006, D1015 and their
periphery, and service it if defective.
FLOW CHART NO.1
The power cannot be turned on.
Is the fuse normal?
Is normal state restored when once unplugged
power cord is plugged again after several seconds?
Is the EV +3.3V line voltage normal?
See FLOW CHART No.2 <The fuse blows out.>
Check if there is any leak or short-circuiting on the
primary circuit component, and service it if defective.
(Q1003, Q1001, Q1008, T1001, D1001, D1002,
D1004, D1005, D1011, C1003, C1005)
Check each rectifying circuit of the secondary circuit
and service it if defective.
Ye s
Ye s
Ye s
No
No
No
Is approximately -23V voltage supplied to the
anode of D1003?
Check D1003 and periphery circuit, and service it
if defective.
Check if there is any leak or short-circuit
on the loaded circuit, and service it if defective.
No
FLOW CHART NO.5
-FL is not outputted.
Is F1(-14V) outputted normally? Refer to "FLOW CHART NO.11"
<The fluorescent display tube does not light up.>
Ye s
Is approximately -20V voltage outputted to the
collector of Q1013?
Check Q1013 and periphery circuit, and service it
if defective.
No
Ye s
No
Ye s

16
DVD-1930
FLOW CHART NO.7
P-ON+5V is not outputted. (EV+11V is outputted normally.)
Is the "H" signal inputted into the base of Q1004?
Replace Q1004.
Check R1068 and D1046, and service it if defective.
Ye s
No
FLOW CHART NO.8
P-ON+3.3V is not outputted. (P-ON+11V is outputted normally.)
Is 3.3V voltage supplied to the collector of Q1011?
Replace Q1011 or R1066 or R1067.
Check D1008, C1007, C1038, L1007 and the
periphery circuit, and service it if defective.
Ye s
No
FLOW CHART NO.9
EV+5V is not outputted.
Is EV+11V outputted normally? Refer to "FLOW CHART NO.6"
<P-ON+11V (EV+11V) is not outputted.>
Ye s
No
FLOW CHART NO.10
EV+1.2V is not outputted.
Is 2.5V voltage supplied to Pin(3) of IC1003?
Replace IC1003.
Check D1006, C1014 and the
periphery circuit, and service it if defective.
Ye s
No
FLOW CHART NO.6
P-ON+11V (EV+11V) is not outputted.
Is 11V voltage supplied to the emitter of Q1002?
Is the voltage of base on Q1002 lower than the
voltage of emitter on Q1002 when turning the power on?
Replace Q1002.
Check D1030, D1048, C1035, C1048, L1009 and
the periphery circuit, and service it if defective.
Check Q1016 and PWRCON line and service it if
defective.
Ye s
Ye s
No
No
Is the "H" signal inputted into the base of Q1014 ?
Ye s
Replace Q1014.
Check D1047, R1069, R1098 and the periphery
circuit, and service it if defective.
No

17
DVD-1930
Ye s
Ye s
Ye s
Ye s
No
No
No
No
FLOW CHART NO.11
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pins(6,24) of IC2001?
Is the voltage of approximately -20V supplied to
Pin(15) of IC2001?
Is there 500kHz oscillation at Pin(26) of IC2001?
Are the filament voltage supplied between
Pins(1, 2) and Pins(29, 30) of the fluorescent
display tube? And the negative voltage applied
between these pins and GND?
Replace the fluorescent display tube.
Check the EV+3.3V line and service it if defective.
Check the -FL (-20V) line and service it if defective.
Check R2002, IC2001 and their periphery, and
service it if defective.
Check PWRCON
line, and service
it if defective.
Is the "H" signal inputted
to base of Q1016?
Check D1016, D1017, T1001, and their periphery,
and service it if defective.
Is -14V voltage supplied to collector of Q1005?
No
Ye s
Ye s
No
Check Q1015, Q1016, D1055 and
their periphery, and service it if defective.
Ye s
No
FLOW CHART NO.12
The key operation is not functioning.
Are the contact point and the installation state of the key
switches (SW2101, SW2103-2108, SW2181-2183) normal?
When pressing each switches (SW2101, SW2103-2108,
SW2181-2183), do the voltage of each pin of IC2001
(shown below) increase?
SW2103, 2104, 2106, 2107, 2182: IC2001 3PIN
SW2101, 2105, 2108, 2181, 2183: IC2001 4PIN
Check the switches (SW2101, SW2103-2108,
SW2181-2183) and their periphery, and service it
if detective.
No
Re-install the switches (SW2101, SW2103-2108,
SW2181-2183) correctly or replace the poor switch.
Replace IC2001.
Ye s
FLOW CHART NO.13
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.
Replace the infrared remote control receiver (RM2001)
or replace the remote control unit.
Check the line between Pin(1) terminal of receiver
(RM2001) and Pin(26) of CN1001, and service it if
defective.
Is the "L" pulse sent out Pin(1) terminal of receiver
(RM2001) when the infrared remote control is activated?
Is the "L" pulse supplied to the Pin(26) of CN1001?
Replace DVD Main CBA Unit.
Is 5V voltage supplied to Pin(3) terminal of
the infrared remote control receiver (RM2001)?
Ye s
No
Check EV+5V line and service it if defective.
No
No
Ye s
Ye s

18
DVD-1930
FLOW CHART NO.17
[No Disc] indicated. (When the focus servo is not functioning.)
FLOW CHART NO.18
[No Disc] indicated. (When the laser beam does not light up.)
Replace the DVD Main CBA Unit.
Replace the DVD Mechanism.
No
Ye s
Replace the DVD Main CBA Unit.
Replace the DVD Mechanism.
No
Ye s
No improvement can be found. Original DVD Main CBA Unit is poor.
No improvement can be found. Original DVD Main CBA Unit is poor.
FLOW CHART NO.16
[No Disc] indicated. (When the focus error occurs.)
Replace the DVD Main CBA Unit.
No improvement can be found. Original DVD Main CBA Unit is poor.
Replace the DVD Mechanism.
No
Ye s
Ye s
FLOW CHART NO.15
The disc tray cannot be opened and closed.
Replace the DVD Main CBA Unit.
Original DVD Main CBA Unit is poor.
Replace the DVD Mechanism.
No improvement can be found. No
Ye s
FLOW CHART NO.14
The disc tray cannot be opened and closed. (It can be done using the remote control unit.)
Is the normal control voltage inputted to Pin(4) of
IC2001?
Refer to "FLOW CHART NO.12" <The key
operation is not functioning.>
Refer to "FLOW CHART NO.15" <The disc tray
cannot be opened and closed.>
Replace the "OPEN/CLOSE" button (SW2108).
No
FLOW CHART NO.19
Both functions of picture and sound do not operate normally.
Replace the DVD Main CBA Unit.
Replace the DVD Mechanism.
No
Ye s
No improvement can be found. Original DVD Main CBA Unit is poor.

19
DVD-1930
Is 5V voltage applied to the pin(4, 12) of
IC1402, IC1405 and pin (4) of IC1401?
Replace IC1401,
IC1402, IC1405.
Check P-ON+5V line and
service it if detective.
Are the video signals outputted to each pin
of IC1401, IC1402, IC1405?
Ye s N o
Ye s
Ye s
No
Check the periphery of JK1407 from
Pin (6) of IC1401 and service it if detective.
Check the periphery of JK1405 from Pins (10, 11,
13) of IC1402
and service it if detective.
Check the periphery of JK1401 from
Pin (5) of IC1401 and service it if detective.
Check the periphery of JK1401 from
Pin (7) of IC1401 and service it if detective.
Are the video signals outputted to the specific
output terminal?
Are the composite video signals outputted to the
VIDEO OUT terminal (JK1407)?
Are the luminance signals outputted to the
S-VIDEO OUT terminal (JK1401)?
Are the chroma signals outputted to the
S-VIDEO OUT terminal (JK1401)?
No
No
No
No
Are the R, G, B signals outputted to the
RGB OUT terminal (JK1405)?
Check the periphery of JK1407 from Pins (10, 11,
13) of IC1405
and service it if detective.
No
Are the Y, Cb/Pb, Cr/Pr signals outputted to the
COMPONENT OUT terminal (JK1407)?
FLOW CHART NO.20
Picture does not appear normally.
Set the disc on the disc tray, and playback.
Are the video signals outputted to each pin of
CN1601 on the AV CBA?
Replace the DVD Main CBA Unit or DVD Mechanism.
Check the line between each pin of CN1601 and
each pin of IC1401, IC1402, IC1405 on the AV
CBA, and service it if detective.
CN1601 1PIN →IC1401 3PIN
CN1601 10PIN →IC1401 1PIN
CN1601 4PIN →IC1403 4PIN
IC1403 5PIN →IC1402 8PIN
IC1403 3PIN →IC1405 8PIN
CN1601 6PIN →IC1403 15PIN
IC1403 2PIN →IC1402 6PIN
IC1403 1PIN →IC1405 6PIN
CN1601 8PIN →IC1403 14PIN
IC1403 12PIN →IC1402 3PIN
IC1403 13PIN →IC1405 3PIN
Are the video signals shown above inputted into
each pin of IC1401, IC1402, IC1405?
Ye s
No
No
CN1601 1PIN S-Y
CN1601 4PIN Cr/Pr, R
CN1601 6PIN Cb/Pb, B
CN1601 8PIN Y, G
CN1601 10PIN S-C
S-VIDEO OUT,
VIDEO OUT is NG.
IC1401 3PIN S-Y
IC1401 1PIN S-C
RGB OUT is NG.
IC1402 8PIN R
IC1402 3PIN G
IC1402 6PIN B
Y, Cb/Pb, Cr/Pr is NG.
IC1405 3PIN Y
IC1405 6PIN Cb/Pb
IC1405 8PIN Cr/Pr
S-VIDEO OUT,
VIDEO OUT is NG.
IC1401 5PIN S-Y
IC1401 7PIN S-C
IC1401 6PIN CVBS
RGB OUT is NG.
IC1402 10PIN R
IC1402 13PIN G
IC1402 11PIN B
Y, Cb/Pb, Cr/Pr is NG.
IC1405 13PIN Y
IC1405 11PIN Cb/Pb
IC1405 10PIN Cr/Pr

20
DVD-1930
FLOW CHART NO.21
Audio is not outputted normally.
Set the disc on the disc tray, and playback.
Are the analog audio signals outputted to each pin
of CN1601 on AV CBA?
Is the "H" level mute signal outputted to CN1601
on AV CBA ?
CN1601 12PIN AUDIO(L)
CN1601 14PIN AUDIO(R)
CN1601 13PIN AUDIO(L)-MUTE
CN1601 19PIN AUDIO(R)-MUTE
IC1201 1PIN AUDIO(L)
IC1201 7PIN AUDIO(R)
IC1201 2PIN AUDIO(L)
IC1201 6PIN AUDIO(R)
Replace IC1201.
Check the periphery between Pins(1,7) of IC1201,
JK1201 and JK1405, and service it if detective.
Check each line between each pin of CN1601
and each pin of IC1201 on AV CBA, and service it
if detective.
CN1601 12PIN →IC1201 2PIN AUDIO(L)
CN1601 14PIN →IC1201 6PIN AUDIO(R)
Are the analog audio signals inputted to each pin
of IC1201.
Are the analog audio signals outputted to each pin
of IC1201?
Are the audio signals outputted to the specific
output terminal?
Are the audio signals outputted to the audio
terminal (JK1201 and JK1405)?
Ye s
Ye s
Ye s
Ye s
No
No
No
No
No
Replace the DVD Main CBA Unit or DVD Mechanism.
Replace the DVD Main CBA Unit or DVD Mechanism.