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6

7

7

 Follow the disassembly procedure in the numerical order given.

!™

 CNP806 (2P)

1

 Three screws

     (BTP3x8)

2

 Four screws

     (BTP3x8)

3

 Bottom plate

6

 Side panel (L)

8

 Side panel (R)

7

 Three screws

     (BTP3x8)

!¡

 Auto fuse

    (F901 to 904)

!£

 Screw (BTP3x8)

!∞

 Screw (BTP3x8)

4

 Three screws (BTP3x8)

5

 Two screws (BTP3x8)

9

 Two screws (M4)

0

 Cover

!§

 Filter board

!¢

 Fan motor block

1

 Four screws

     (BTP3x12)

3

 Six screws

     (BVTP3x14)

!™

 Sub heat sink

     (Amplifier)

2

 Three screws

     (P4x40)

!¡

 Three screws

     (P3x6)

8

 Four screws

     (P3x10)

!£

 Four insulating sheets

     (AMP)

9

 Four screws

     (P3x14)

0

 Screw

     (BTP3x8)

4

 Retainers

5

 Two screws

     (BVTP3x10)

6

 Power board

7

 Amplifier board

!¢

 Two screws

     (P2x10)

!∞

 LED board

!§

 LED holder

• Perform adjustments in the  HI-VOLTAGE  mode.

1 Adjustment point

Semi-fixed resistors VR101, VR201, VR301, VR401 of ampli-
fier board.

2 Precautions on adjustments
1. Set the RCA input terminal to open.
2. Apply a voltage of 14.4V between the +12V terminal, REMOTE

terminal, and GND terminal.

3. Rotate the above semi-fixed resistors completely in the counter-

clockwise direction while observing the component side.

4. Check that the voltage at the adjustment point becomes 0 mV in

step 2.

5. Fine adjustments may be required according to the characteris-

tics of the MOS-FET used.

• When adjusting the idling current

Rotating the semi-fixed resistor in the clockwise direction:
In creases the idling current
Rotating the semi-fixed resistor in the counterclockwise direction:

Decreases the idling current

* Take note that rotating excessively in the clockwise direction

will increase the idling current suddenly.

3 Approximate adjustment values

Adjust as follows so that the following voltages become
0.4 to 0.5 mV .

 A channel  :
Voltage between TP101 and TP102: Use VR101 of the ampli-
fier board
 B channel  :
Voltage between TP201 and TP202: Use VR201 of the ampli-
fier board
 C channel  :
Voltage between TP301 and TP302: Use VR301 of the ampli-
fier board
 D channel  :
Voltage between TP401 and TP402: Use VR401 of the ampli-
fier board

TP401(D-CH)

TP201(B-CH)

TP101(A-CH)

TP102(A-CH)

TP202(B-CH)

TP402(D-CH)

IDLING

VR401
(D-CH)

VR301
(C-CH)

IDLING

VR201
(B-CH)

VR101
(A-CH)

TP301(C-CH)

TP302(C-CH)

Digital voltmeter

TP101(A-CH)
TP201(B-CH)
TP301(C-CH)
TP401(D-CH)

TP102(A-CH)
TP202(B-CH)
TP302(C-CH)
TP402(D-CH)

8

8

2

2

3

5

7

6

7

6

7

5

6

7

DIFFERENTIAL

AMP

Q104,106

DIFFERENTIAL

AMP

Q105,107

POWER AMP

(VOLTAGE STAGE)

Q108

BIAS

VR101,Q110

LEVEL SHIFT

Q101

OVERLOAD

Q113,115

OVERLOAD

Q114,116

5

7

6

7

5

7

6

7

6

7

5

6

7

DIFFERENTIAL

AMP

Q304,306

DIFFERENTIAL

AMP

Q305,307

LEVEL SHIFT

Q301

OVERLOAD

Q313,315

OVERLOAD

Q314,316

OFFSET

SET

Q857-861

CNJ807

8
2

3

9

4
1

10

6

7

5

CNP805

POWER AMP

(VOLTAGE STAGE)

Q109

POWER AMP

(VOLTAGE STAGE)

Q308

BIAS

VR301,Q310

POWER AMP

(VOLTAGE STAGE)

Q309

POWER AMP

(FINAL STAGE)

Q111-112

POWER AMP

(FINAL STAGE)

Q311-312

NFB ON

NFB OFF

NFB ON

NFB OFF

RY801(1/2)

RY801(2/2)

DIRECT

S806-1

DIRECT 

S805-1

LINE SWITCH

Q102

LINE SWITCH

Q103

LOWBOOST

IC806-1

LOWBOOST

IC812-1

LINE SWITCH

Q302

LINE SWITCH

Q303

FAN CTL

Q852

CNP806

POWER

DRIVE

Q854

THERMAL

DET

TH851

POWER

CONTROL

Q853

FAN DRIVER

Q851

INVERTER

Q855

B-CH

D-CH

CN811

CN810

SPEAKER OUT

ON

OFF

ON

OFF

B-

B+

B-

B+

H.P.F

IC803-1

L.P.F

IC805-1

L.P.F

IC804-1

FILTER

VR805-1

FILTER

VR805-3

PRE AMP

IC807-1

H.P.F

IC808-1

H.P.F

IC809-1

L.P.F

IC811-1

L.P.F

IC810-1

LEVEL

VR802-1

FILTER

VR806-1

FILTER

VR806-3

X10-X1

FILTER

CNP808

CNJ808

CNJ808

CNP808

CNJ809

CNP809

CNP809

CNJ809

HPF

LPF

FLAT

HPF

LPF

FLAT

LOWBOOST

VR803-1

LOWBOOST

VR804-1

CNJ806

FN801

DC FAN MOTOR

INVERTER

Q856

+45V

+15V

-15V

-45V

T851

D854

D855

D856

D857

D858

D859

D861

D860

B+

B-CH

D-CH

TO

POWER

BOARD

CNB805

09

FILTER BOARD

AMPLIFIER BOARD

3

1

TEST TONE AMP

IC851-2

TEST TONE AMP

IC851-1

FILTER

FILTER

FILTER

S803-1

S801-1

S801-3

X10-X1

FILTER

S802-1

S802-3

S804-1

A

A+B

MONO

C+D

MONO

B

(MONO)

(MONO)

INPUT

C

D

SPEAKER OUT

B

A

C

D

2

1

2

1

2

5

7

6

TEST TONE

S851

2

2

3

3

3

M

5

7

6

7

PRE AMP

IC801-1

H.P.F

IC802-1

LEVEL

VR801-1

• Signal path

     : Audio

9

9

7

8

9

2

5

6

10

3

4

CNB805

CN802

CNJ801

TO

AMPLIFIER

BOARD

CNP805

BATTERY

GND

REMOTE

BATTERY

5

4

7

6
3
1

CNP804

POWER  BOARD

OFFSET CONTROL

Q809-810

OFFSET LED

SET

Q804

THERMAL DETECTOR

(For H,S)

TH903

THERMAL DETECTOR

(For TRANS)

TH904

NFB

S802

SWITCH

Q901-902

SWITCH

Q904

SWITCH CTL

Q903

THERMAL
CONTROL

Q918

THERMAL

SWITCH

Q917

THERMAL

LED SWITCH

Q806

11

10

1

2

15

16

3

8

9

12

14

REF-REG

THERMAL SWITCH

TH905,Q919

DRIVER

Q921

INVERTER

Q924,926,928

DRIVER

Q920

INVERTER

Q925,927,929

T902

SWITCHING

CONTROL
Q922-923

11

10

1

2

15

3

8

9

12

14

REF-REG

DRIVER

Q908

INVERTER

Q911,913,915

DRIVER

Q907

INVERTER

Q912,914,916

T901

SWITCHING

CONTROL
Q909-910

THERMAL SWITCH

TH902,Q906

SWITCH

Q905

D901

F903 (25A)

F904 (25A)

F901 (25A)

F902 (25A)

S801-1

HI-V

HI-C

+28V

-28V

TO 
AMPLIFIER
BOARD

+28V

-28V

TO 
AMPLIFIER
BOARD

D905

D912

D913

D906

IC903

DC DET

IC901

DC DET

DC-DC

CONVERTER

IC904

DC-DC

CONVERTER

IC902

THERMAL

DET

TH901

D904

D903

OVER CURRENT

CONTROL
Q807-808

OVER CURRENT

LED SWITCH

Q805

D908

D909

OR

D806

OR

OR

D907

16

MUTE CONTROL

D808,Q811

MUTE SWITCH

Q812

OFF

ON

S801-3

MODE

HI-C

HI-V

S801-4

D911

D910

MUTE ENABLER

IC813

D801

HI-VOLTAGE

D802

HI-CURRENT

D803

OVER CURRENT

G

G

G

R

D804

OFFSET

G

R

D805

THERMAL

G

R

B+

Q801

SWITCH

Q802

SWITCH

Q803

SWITCH

CNB804

LED BOARD

09

MODE

MODE

S801-2

D911

HI-V

HI-C

MODE

+12V

+12V

2

1

3

4

2

1

3

4

B +

B –

B +

B –

HI-V

HI-C

4

3

1

2