NEC VT70 Series, VT80 Series, VT60 Series, NP610 Series, NP-M350X Series Service Manual Supplement

MODEL VT60 Series NP600 Series

VT70 Series NP610 Series
VT80 Series NP-M350X Series
VT90 Series NP-M420X Series
NP3150 Series NP-M350XS Series
NP3250 Series NP-P420X Series
VT700 Series

VT770 Series
NP905 Series

LCD Projector

SERVICE MANUAL SUPPLEMENT

Better Service

Better Reputation

Better Profit

Optical alignment jig (optical axis alignment/polarizer alignment)

SAFETY CAUTION:

Before servicing this chassis, it is important that the service

technician read and follow the “Safety Precautions” and

“Product Safety Notice” in this Service Manual.

WARNING:

SHOCK HAZARD - Use an isolation transformer when servicing.

NEC DISPLAY SOLUTIONS, LTD.

SAFETY PRECAUTIONS

2-1

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE

COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL.

This symbol warns the user that uninsulated voltage within th e u ni t
may have sufficient magnitude to cause electric shock. Therefore, it is
dangerous to make any kind of contact with any part inside of this unit.

This symbol aler ts th e u ser t hat i mportant literature conce rn in g t he
operation and maintenance of this unit has been included.
Therefore, it should be read carefully in order to avoid any problems.

ATTENTION

RISQUE D'ELECTROCUTION

NE PAS OUVRIR

MISE EN GARDE: A FI N DE REDUIRE LES RISQUES D' ELECTR OC UT IO N, NE

PAS DEPO SER LE C OUVE RCLE , IL N' Y A A UCU N E P I ECE
UTILISABLE A L'INTERIEUR DE CET APPAREIL. NE CONFIER
LES TRAVAUX D'ENTRETIEN QU'A UN PERSONNEL QUALIFIE.

Ce symbole a pour but de prévenir I' utilisateur de la présence d'
une tension dangereuse, non isolée se trouvant à l' intérieur de l'

appareil. Elle est d' une intensité sufsante pour constituer un risque

d' électrocution. Eviter le contact avec les pièces à l' intérieur de cet
appareil.

Ce symbole a pour but de prévenir l' utilisateur de la présence d'
importantes instructions concernant l' entretien et le fonctionnement de

cet appareil. Par conséquent, elles doivent être lues attentivement an

d' éviter des problèmes.

WARNING

HEATSINK MAY BE ENERGIZED.
TEST BEFORE TOUCHING.

Heat sink located on the power board, is electried.

mark is putted on the primary heat sink.
Pay attention to this area.

2-2

SAFETY PRECAUTIONS

During servicing carefully observe the following.

1. OBSERVE ALL PRECAUTIONS

Items and locations that require special care during

serv-icing, such as the cabinet, chassis, and parts are
labelled with individual safety instructions. Carefully
comply with these instructions and all precautions in
the instruction manual.

2. BE CAREFUL OF ELECTRIC SHOCK

The chassis carries an AC voltage. If you touch the
chassis while it is still alive, you will get a severe
shock. If you think the chassis is alive, use an isolating
transformer o r gloves, or pul l out t he plug before
replacing any parts.

3. USE SPECIFIED PARTS

The components hav e be en chosen for min imu m

ammability and for specic levels of resistance value

and with s tand v oltag e. Re p lacem e nt pa r ts mu st
ma tch these orig ina l sp ecifica tio ns. Parts whose
specifications are particularly vital to safe use and
maintenance of the set are marked on the circuit
diagrams and parts list.
Substitution of these parts can be dangerous for you

and the customer, so use only specied parts.

4. REMOUNT ALL PARTS AND RECONNECT ALL
WIRES AS ORIGINALLY INSTALLED

For safety, insula t i n g tape and tub e s are u s e d
throughout, but some lift-off parts on the printed wiring

board require special attention.

All wires are positioned away from high-temperature
and high-voltage parts, and, if removed for servicing,
they m u s t be retu n e d precise l y to thei r o r iginal
positions.

5. LAMP

Be very careful of the lamp because it generates high
heat while it is used at high voltage. When replacing
the bulb, make sure it is cool enough.

6. LENS

Do not l ook i n to th e len s dur i ng pr oject i on. This
important to avoid damage to the eyes.

7. SERVICING

At the time of repair or inspection services, use an
earth band (wrist band), without fail.

8. RUN A COMPLETE SAFETY CHECK AT THE
COMPLETION OF SERVICING

Aft e r com p l e tion of serv i c i ng, co n firm th a t a l l
screws, parts, and wiring, removed or disconnected
for servicing, have b een returned to their o riginal
positions. Also examine if the serviced sections and
peripheral areas have suffered from any deterioration
as a result of servicing. In addition, check insulation
between external metallic parts and blades of wall­outlet plugs. This examina tion is indispensable in

conrming complete establishment of safety.

(Insulation check)
Pull out a plug from a wall outlet to disconnect the
connection cable. Then turn on the POWER switch.
Use a 500V megger (Note 2) and confirm that the

insulation resistance is 1MΩ or more between each

terminal of the plug and exposed external metal (Note

1). If the measured value is below the specied level,
then it is necessary to inspect and x the set.

(Note 1)

Exposed external metal....RGB input terminals, control

terminals, etc.
(Note 2)
If a 500V megger is not available for an unavoidable
reason, then use a circuit tester or the like for inspection.

Optical alignment jig (optical axis alignment/polarizer alignment)

This is our information for you indicating that we have provided for a jig kit (extension

connector plus extension connector PWB) to be used for optical alignments of the LCD
projector.

The jig kit to be provided (extension connector plus extension connector PWB) involves the

following 33 items.

<<Optical alignment jig (Extension connector/Connector PWB for extension)>>

No. Part No. Description Number of pins Photo Wire length

1 9N9CN001

CONNECTOR
(2P-900)

2P connector

900mm

2 9N9CN002

CONNECTOR
(3P-900)

3P connector

900mm

3 9N9CN003

CONNECTOR
(4P-900)

4P connector

900mm

4 9N9CN004

CONNECTOR
(5P-900)

5P connector

900mm

5 9N9CN005

CONNECTOR
(2P-300)

2P connector

300mm

6 9N9CN006

CONNECTOR
(3P-400)

3P connector

400mm

7 9N9CN007

CONNECTOR
(4P-300)

4P connector

300mm

8 9N9CN008

CONNECTOR
(5P-450)

5P connector

450mm

9 9N9CN009

CONNECTOR
(13P-600)

13P connector

600mm

10 9N9CN010

CONNECTOR
(15P-500)

15P connector

500mm

No. Part No. Description Number of pins Photo Wire length

11 9N9CN011

CONNECTOR
(16P-500)

16P connector

500mm

12 9N9CN012

CONNECTOR
(18P-600)

18P connector

600mm

15 9N9FFC02

CABLE FFC
(24P-600)

24P connector

600mm

16 9N9FFC03

CABLE FFC
(30P-600)

30P connector

600mm

17 9N9FFC04

CABLE FFC
(32P-600)

32P connector

600mm

18 7N500019

CABLE FFC
(36P-600)

36P connector

600mm

19 9N9FFC06

CABLE FFC
(40P-600)

40P connector

600mm

13 9N9FFC07

CABLE FFC
(57P-600)

57P connector

600mm

20 9N9M0001

RELAY PWB
(2P)

2P PWB

21 9N9M0002

RELAY PWB
(3P)

3P PWB

22 9N9M0003

RELAY PWB
(4P)

4P PWB

23 9N9M0004

RELAY PWB
(5P)

5P PWB

24 9N9M0005

RELAY PWB
(15P)

15P PWB

No. Part No. Description Number of pins Photo Wire length

25 9N9M0006

RELAY PWB
(13P)

13P PWB

26 9N9M0007

RELAY PWB
(24P)

24P PWB

27 9N9M0008

RELAY PWB
(30P)

30P PWB

28 9N9M0009

RELAY PWB
(32P)

32P PWB

29 9N9M0010

RELAY PWB
(36P)

36P PWB

30 9N9M0011

RELAY PWB
(40P)

40P PWB

31 9N9M0012

RELAY PWB
(18P)

18P PWB

32 9N9M0013

RELAY PWB
(57P)

57P PWB

33 9N9M0014

RELAY PWB
(16P)

16P PWB

1. Kit and dummy load
The existing jig kit and dummy load are available only if these are kept in stock.

In the future, no jig kits and dummy loads will be put into inventory any more.
Reasons;

If any part of these items is not obtainable, no complete kit can be established any more.
Therefore, the maintenance of the inventory is impossible to continue.
The dummy load is expensive. In addition, it is extremely difficult to establish the former
model of a dummy load again.

If our supply system is maintained so that a single jig kit can be supplied, we can easily
accept an ordering for the supply of parts.

2. Method of optical axis alignments without a dummy load
In regard to the VT70, VT80, VT90, NP3150, NP3250, VT700, and NP905 Series, we have
made optical axis alignments by means of a dummy load. In the future, please make optical
axis alignments with the use of the extension connector and the extension connector PWB in
the same manner as for the polarizer alignments.
(The method of connection to make optical axis alignments with the use of the extension
connector and the extension connector PWB is the same as for the polarizer alignment. This
method is used for the NP600, NP610, and NP-M Series.)
In regard to the extension connector and the extension connector PWB needed to make
connections with the MAIN PWB, please refer to the relevant Service Manual (method of
adjustment, list of jigs) for each model.

Example (VT90 Series)

Connections to make the polarizer alignments
with the use of the extension connector and the
extension connector PWB

The connections indicated above can also be
used for optical axis alignment

Connections for optical axis alignments by
means of a dummy load