Jvc UXP 6 R Service Manual

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UX-P6R

JVB
SERVICE MANUAL

MICRO COMPONENT SYSTEM

UX-P6R

exe
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SP-UXP6 CA-UXP6R SP-UXP6

Area Suffix
COMPACT E---- Continental Europe

@U§@ @ RIDISI EN ------ Northern Europe

Contents
Safety precautions ------------------------ 1-2 Maintenance of laser pickup ............ 1.20
Preventing static electricity ------------- 1-4 Replacement of laser pickup ........... 1-20
Important for laser products ------------ 1-6 Description of major ICs ................. 1.21
Disassembly method --------------------- 1-7 Internal connection of display .......... 1-40
Main adjustment -------------------------- 1-1 5
Flow of functional operation

until TOC read (CD) ------- 1-19

No.20980

COPYRIGHT {6) 2001 VICTOR COMPANY OF JAPAN, LTD.
Jun. 2001

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-Safety Precautions

1. This design of this product contains special hardware and many circuits and components specially for safety
purposes. For continued protection, no changes should be made to the original design unless authorized in
writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services
should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product
should not be made. Any design alterations or additions will void the manufacturers warranty and will further
relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily
be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by (A) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be
separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of
electric shock and fire hazard. When service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage currnet check (Electrical shock hazard testing)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the product

(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the

product is safe to operate without danger of electrical shock.

Do not use a line isolation transformer during this check.

0 Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).

0 Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 9 10W resistor paralleled by a 0.1511 F AC»type capacitor

between an exposed metal part and a known good earth ground. AC VOLTMETER
Measure the AC voltage across the resistor with the AC a (HavingiOOO
voltmeter. ohms/volts,

or more sensitivity)

Move the resistor connection to eachexposed metal part, a
particularly any exposed metal part having a return path to
the chassis, and meausre the AC voltage across the resistor. 0'15: AC TYPE

Now, reverse the plug in the AC outlet and repeat each -" P'ace'hls
measurement. Voltage measured any must not exceed 0.75 V W): . ~ ggifieeigosed
AC (r.m.s.).This corresponds to 0.5 mA AC (r.m.s.). 15009 10W metal part.

Good earth ground

_ Warning A CAUTION
1.This equipment has been designed and manufactured to meet international safety standards. Burrs formed during molding may
2. it is the legal responsibility of the repairer to ensure that these safety standards are maintained. be left over on some parts of the
3. Repairs must be made in accordance with the relevant safety standards. chassis. Therefore, pay attention to
4. it is essential that safety critical components are replaced by approved parts. such burrs in the case of
5. if mains voltage selector is provided, check setting for local voltage. preforming repair of this system.

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor (u), diode (h) and ICP (Q) or identified by the "ZN
mark nearby are critical for safety.

When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.
(Except the J and C version)

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ORemoving the power amplifier board
(See Fig.19 and 21)

6. Disconnect the power amplifier board from connector
CN941 on the power amplifier sub board.

ORemoving the power amplifier sub
board (See Fig.19 to 21)

7. Disconnect the two wires from connector CN944,
CN945, CN946 and CN947 on the power amplifier
sub board.

8- Remove the two screws J attaching the power
amplifier sub board and the heat sink.

ORemoving the main board
(See Fig.19 to 21)

9. Disconnect the wires from connector CN944, CN945,
CN946 and CN947 on the power amplifier sub
board.

10. Remove the two screws K attaching the main board
and the heat sink.

REFERENCEThe power amplifier board, the power
amplifier sub board, the main board
and the heat sink can be remove
drespectiveiy.

Heat sink

Main board '
Power amplifier sub boar
Fig.21

Power amplifier board

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Main board

Heat sink

Power amplifier board

Power amplifier sub boar

Fig.19

Main board

Heat sink

Power amplifier board
CN944 CN946

Power amplifier sub board
CN941

Fig.20

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1 -38

Pin name Pin No. Descriptions
0.5 X VDD voltage generation block for analog ground.
Vref 19 Capacitor of several 10 11F to be connected between Vref and
AWSS (VSS) as a counter-measure against power ripple.
V88 3 Ground pin
VDD 35 Supply pin
Chip enable pin.
CE 2 Data written into an internal latch in a timing of [H] -> [L].
Each analog switch is activated.
Data transfer enabled at [H] level.
DI 1 Serial data and clock input pin for control.
CL 36
LINP 6 Non-inverted input pin of general-purpose operation amplifier.
RINP 32 Keep this pin open when not used.
Non-inverted input pin of general-purpose operation amplifier.
LINM 5 Connect to L (R) OPOUT pin when not used.
FllNM 33 (Connect between pins 5 and 4)
(Connect between pins 33 and 34)
Output pin of general-purpose operation amplifier.
LOPOUT 4 Connect to L (R) INN pin when not used.
ROPOUT 34 (Connect between pins 5 and 4)

(Connect between pins 33 and 34)