Jvc RX 7001 PGD Service Manual

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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 ($) 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 areturn 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 1,500910W resistor paralleled by
a 0.15uF AC-type capacitor between an exposed

AC VOLTMETER
metal part and a known good earth ground. E (Having 1000
Measure the AC voltage across the resistor with the ohms/volts,
AC voltmeter. or more sensitivity)
Move the resistor connection to eachexposed metal ° °
part, particularly any exposed metal part having a 0_15uF AC TYPE
return path to the chassis, and meausre the AC .
voltage across the resistor. Now, reverse the plug in -II- 32:22:25
the AC outlet and repeat each measurement. voltage WV ' > each exposed
measured Any must not exceed 0.75 V AC (r.m.s.). 15009 10W metal part.

This corresponds to 0.5 mA AC (r.m.s.).
Good earth ground

-Warnlng
1.This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

A CAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.

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Page 23

3.Pin functions (MBQOOBB)

RX-7001 PGD

RI? Symbol I/O Function
1 YIN I Brightness signal Input terminal for Superinpause indication
2 VIN I Composite video signal input terminal for Superinpause indication
3 CIN I Contrast signal input terminal for Superinpause indication
4 AVcc - Analog power supply terminal
5 IOUT 0 Color (Brightness) signal output terminal
6 VOC 0 Character output terminal
7 Vcc _ Power supply terminal
8 EXS | Clock generater outside circuit terminal for color burst
9 XS 0
10 We 0 Horizontal signal output terminal
11 m0 0 Vertical signal output terminal
12 MN I EXT horizontal signal input terminal
13 mm | EXT vertical signal input terminal
14 V55 . GND
15 EXD | Dot clock generater outside circuit signal terminal for indication
16 XD 0
17 V03 0 Character & background signal output terminal
18 GOUT 0 Color signal (Green, Fled, Blue)
19 ROUT
20 BOUT
21 TST I Test signal input terminal
22 SCLK I Shift clock input terminal for serial transmission
23 SIN I Serial data input terminal
24 is I Chip select terminal
25 COUT 0 Contrast signal output terminal
26 VOUT 0 Composite video signal output terminal
27 YOUT O Brightness signal output terminal
28 AVss _ Analog GND terminal

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Page 95

@

I Basic Settings

Some of the following settings are required after connecting and positioning your speakers in your listening room, while

others Will make operations easier.

IMPORTANT:

When using the remote control, check to see if its
remote control mode selector is set to the correct
position:

To operate this receiver, set it to AUDIO/TV/
VCR."

W].

Recording a Source

For analog-to-analog recording

You can record any analog source through the receiver to 7

° the ette deck (or MD recorder) connected to the TAPE/MD
jacks, and

' the VCR connected to the VCR jacks

i at the same time.

For digital-to-digital recording

You can record the currently selected digital input through the
receiver to a digital recording device connected to the DIGITAL
OUT terminal.

Notes:

- Analog-to-digital and digital-to-analog recordings are not possible.

- The output volume level, bass boost (see page 12), SEA modes
(see page 20), and DSP modes (see page 21 ) cannot affect the
recording.

- The test tone signal (see page 25, 26) does not come out through
the DIGITAL OUT terminal.

Adjusting the Front Speaker Output
Balance

If the sounds you hear from the front right and left speakers are
unequal, you can adjust the speaker output balance.

Before you start, remember...
' There is a time limit in doing the following steps. If the setting is
canceled before you finish, start from step 1 again.

MM

1. Press BALANCE (lSURROUND)
ADJUST repeatedly until L/R
BALANCE appears on the
display.

The display changes to show the current setting.

BAMNCE
ADJUST

13

ENIDJBRXJOOIPGD[U,US]/i 3

tr

2. Turn MULTI J 0G to adjust the
balance.
. Turning it clockwise decreases the left
channel output.
' Turning it counterclockwise decreases the
right channel output.

Changing the Source Name

When you have connected an MD recorder to the TAPE/MD jacks
or the DBS tuner to the TV SOUND/DBS jacks on the rear panel,
change the source name which will be shown on the display when
you select the MD recorder or DBS tuner as the source.

On the front panel DNL Y:

1. When changing the source name
from TAPE to MD:
0 Turn SOURCE SELECTOR

until TAPE appears.

When changing the source name from TV
SOUN to DBS:
- Turn SOURCE SELECTOR until TV

SOUND appears.
®> a
Mme F1

To change the source name to TAPE or TV SOUND, repeat
the same procedure above 7 in step 1, select MD" or DBS then
press and hold SOURCE NAME (BASS BOOST).

souRcE sEtEcron

2. Press and hold SOURCE NAME
(BASS BOOST) until ASSGN.
MD or ASSGN. DBS appears
on the display.

Note:

Without changing the source name, you can still use the connected

components. However, there may be some inconvenience.

- TAPE" or "TV SOUND" will appear on the display when you select
the MD recorder or DBS tuner.

- You cannot use the digital input (see page 16) for the MD recorder

- You cannot use the COMPU LINK remote control system (see page
35) to operate the MD recorder.

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