Jvc RX 7010 RBK Service Manual

Page 2

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RX-701ORBK/RX-7012RSL

-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 (/t\,) 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.).

. 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 Q10W resistor paralleled by a 0.1 51.1 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 (Having1000
voltmeter. ohms/volts,

Move the resistor connection to eachexposed metal part, c more sens'W'W)

particularly any exposed metal part having a return path to F A TYPE
the chassis, and meausre the AC voltage across the resistor. 0'15 C

Now, reverse the plug in the AC outlet and repeat each -| Placethis
measurement. voltage measured Any must not exceed 0.75 V WV . Pmbe 0"
each exposed

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.
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.

chassis. Therefore, pay attention to

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 (-), diode (h) and ICP (Q) or identified by the (N
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 JC version)

Page 19

I UPD784215AGC103 (IC671) : UNIT CPU

RX-701ORBK/RX-7012RSL

1.Pin layout
~ 51
50
26
~ 25
2.Pin function
Pin No. Symbol l/O Function
1~8 - Non connect
9 VDD - Power supply terminal
10 X2 0 Connecting the crystal oscillator for system main clock
11 X1 I Connecting the crystal oscillator for system main clock
12 V88 - Connect to GND
13 XT2 0 Connecting the crystal oscillator for system sub clock
14 XT1 I Connecting the crystal oscillator for system sub clock
15 RESET I System reset signal input
16 AUTODATA I Output of DSP to general-purpose port
17 LOCK I Output of DSP to general-purpose port
18 DIGITALO I Output of DSP to general-purpose port
19 FORMAT I Output of DSP to general-purpose port
20 CHANNEL I Output of DSP to general-purpose port
21 ERR I Output of DSP to general-purpose port
22 W I Reset signal input
23 AVDD - Power supply terminal
24 AVREFO - Connect to GND
25~32 - Connect to GND
33 AVSS - Connect to GND
34,35 - Non connect
36 AV REF1 - Power supply terminal
37,38 RX,TX - Not use
39 - Non connect
40 DSPCOM I Communication port from IC701
41 DSPSTS 0 Status communication port to |C701
42 DSPCLK I Clock input from IC701
43 DSPRDY I Ready signal input from |C701
44 - Non connect
45,46 MlDIOJN/OUT l/O Interface I/O terminal with microcomputer
47 MICK 0 Interface I/O terminal with microcomputer of clock signal
48 m 0 Interface I/O terminal with microcomputer of chip select
49 W 0 Interface I/O termonal with microcomputer
50 W 0 Interface I/O termonal with microcomputer
51,52 - Non connect
53 DSPRST 0 Reset signal output of DSP
54~63 - Non connect
64,65 CDTl/CDTO l/O Interface I/O terminal with microcomputer
66 W 0 Interface I/O terminal with microcomputer of clock signal
67 -S 0 Interface I/O terminal with microcomputer of chip select
68 XTS O OSC Select
69,70 - Non connect
71 W 0 Reset signal output
72 GND - Connect to GND
73~80 - Non connect
81 VDD - Power supply
82 3D-ON - Non connect
83 3D-ON 0 Switch at output destination of surround channel
84 ANA/T-TONE 0 Test tone control
85 REF-MIX 0 Control at output destination of LFE channel
86 - Non connect
87 D_MUTE O Mute of the digital out terminal is controlled
88 S.MUTE O Mute of the audio signal is controlled
89 - Non connect
90~93 ASW1~4 0 Selection of digital input selector
94 TEST - Test terminal
95~100 - Non connect

Page 86

Adjusting the DAP Modes flan? the remute cantth

Once you have adjusted the DAP modes, the adjustment is
memorized for each DAP mode.

Before you start, remember...

- Make sure that you have set the speaker information correctly
(see page 14).

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

° You cannot adjust the rear speaker output level when you have set
REAR SPK" to NO. See page 14.

On the front ganel:

1. Press DSP MODE repeatedly until DSP MODE
the DAP mode - LIVE CLUB,

DANCE CLUB, HALL, or
PAVILION - appears on the
display.

The DSP indicator also lights up on the display.

2. Adjust the rear speaker output levels.

1) Press ADJUST repeatedly until one of ADJUST
the following indications appears on
the display.

REAR L LEVEL:

To adjust the left rear speaker level.
REAR R LEVEL:

To adjust the right rear speaker level.

2) Press CONTROL UP AIDOWN V to
adjust the selected speaker output level
(from +10 dB to -10 dB).

3) Repeat 1) and 2) to adjust the other
speaker output level.

CONTROL
Dow UP

3. Adjust the effect level.

1) Press ADJUST repeatedly until DSP ADJUST
EFFECT appears on the display.
The display changes to show the current

setting.

2) Press CONTROL UP AIDOWN V to Doivoriimobp
select the effect level. -
' Each time you press the button, the

effect level changes as follows:

[DSP EFFECT 1~>DSP EFFECT 2 "DSP EFFECT 3
DSP EFFECT 54-»DSP EFFECT 4

As the number increases, the selected DAP mode becomes
stronger (normally set it to DSP EFFECT 3).

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Press DSP MODE repeatedly until asp

the DAP mode - LIVE CLUB,
DANCE CLUB, HALL, or v
PAVILION - appears on the

display.

The DSP indicator also lights up on the display.

Press SOUND. W

The 10 keys are activated for sound adjustments. %

Adjust the rear speaker output
levels.

' To adjust the left rear speaker level, press
REAR'L +/7 (from +10 dB to 710 dB).

. To adjust the right rear speaker level, press @REAHR*
REAR-R +/7 (from +10 dB to 710 dB). '%
Press EFFECT to select an effect EFFECT

level you want.
. Each time you press the button, the effect

level changes as follows:

[DSP EFFECT 1 ->DSP EFFECT 2 ->DSP EFFECT 3 ]
DSP EFFECT 5- DSP EFFECT 4

As the number increases, the selected DAP mode becomes

stronger (nomially set it to DSP EFFECT 3).

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