Harman Kardon CA-260 Service manual

G.

Electronic Service Data

P.O. Box 386/Ambler PA 19002

Tannenbaum

Phone [phone] Fax 215 657

Web Page www.

agtannenbaum.com

harman/kardon

0520

MODEL CA-260

CAR

AMPLIFIER

~~

~~

The Harman Kardon

3 7

Model CA260

HIGH FIDELITY

DlJ mJ 0

CAR AM

~ 1RUTI~

PLIFIER

mJ QJJ

Manual No.

74A

harman / kardon

240 CROSSWAYS PARK WEST

1112.H15274A8 P.08846 1650 PRINTED IN JAPAN

, WOODBURY. N.

Y. 11797

~~I

, -

~ .

~;;

Power Output

HCC (High Instantaneous: :t 30A

Current Capability)

THD

Negative Feedback

Power Bandwidth

Frequency Response

Signal-to-

I nput Sensitivity

Line Level

High Level

DISASSEMBLY PROCEDURES

Note: When replacing parts

terminals of the capacitor (C51

source with 8D

charge accumulated.

IIJ CABINET BOTTOM ASSEMBLY (101) REMOVAL

Remove 7

Assembly (101).

IZJ MAIN P.

1. Remove the Cabinet Bottom Assembly (101). (Refer

to step rn .

2. Remove 9

(PCB-

Board (PCB-

(PCB-

3. Unsolder the

Board (PCB-

(PCB-

by unsoldering.

4. Remove 2

(142) with the

Bridged-Mono Switch P

minals (TEl and TE2).

, RMS

Noise Ratio

screws ~ and

C. BOARD (PCB-

screws fY and remove the Main P

l) with Cabinet Back

2), Bridged-

3) and terminals (TEl and TE2).

: 60 watts per channel into

4 Ohms

: 90 watts per channel into

2 Ohms

: 180 watts bridged mono into

4 Ohms

: No more than 0.

: 25dB

: 10Hz to 100

: 10Hz to 100,

: 80dB

: 0. 25V 10.

: 3V

, discharge by shorting between

1O0W resistor as it

remove the Cabinet Bottom

1) REMOVAL

Mono

, 20 ~ 20,

, 20 ~ 20,

, 20 ~ 20,

8V (switchable)

, C52) at the power

(142), Line Input P

Switch P

lead wires from the

2) and Bridged-

3) and remove the

screws ~ and remove the

Line Input P

Mono Switch P.

terminals (TEl and

C. Board (PCB-

C. Board (PCB-

000Hz

000Hz

000Hz

000Hz
000Hz

+ 0

(REFER TO PAGES 4 AND 10)

may have

C. Board

C. Board

Line Input P

C. Board

TE2)

Cabinet Back

3) and ter-

2),

3dB

Active Crossover Characteristics

High Pass

Low Pass

Power Supply

Typical Input Current Requirements

At Idle

Full Power Music Signal: 6.

Full Power Sine Wave

Dimensions (W x H x D) : 15-

Weight

All specifications and features subject to change without notice.

~ POWER SUPPLY P.

1. Remove the Cabinet Bottom

to step rn .

2. Unsolder the lead wires from the

(Tl ).

3. Remove 7

C. Board (PCB-

Fuse with Holder (Fl),

(TE3).

4. Remove the

5. Remove

(143) with Fuse with Holder (Fl),

and terminal

connector from Fuse with Holder (F

141 POWER

1. Remove the

(Refer to step

2. Remove 4

former (T1).

screws

terminal (TE3) by unsoldering.

screw C) and

(TE3). At this time

TRANSFORMER (T1) REMOVAL

Power Supply P

screws () and remove the

: 200Hz, 12d B/Octave
: 200Hz

: DC + 13.

: 2.

: lOA (2 Ohms/ch.
: 20A (4 Ohms/ch.

: 30A (2 Ohms/ch.

: 101bs. 20z (4.

C. BOARD (PCB-

C!) and remove the

4) with the Cabinet Back

, 6dB/Octave

8V (11 ~ 16V

negative ground

7 A (4 Ohms/ch.

5/8"x3-7/8"

(396 x 98 x 180 mm)

Assembly (101). (Refer

Insulator (186) and terminal

remove the

x7-

1/8"

6kg)

4) REMOVAL

Power Transformer

Power Supply

Cabinet Back

Insulator (186)

, disconnect the

1).

C. Board (PCB-

Power Trans-

usable),

(143),

4).

PROTECTION

If the temperature

the protection circuit

output. At this time the protect indicator

temperature comes back below 80

output returns as it was.

If the temperature

circuit is shut off

also the protect indicator goes out. If this happens

is possible that the CA260 is broken. However

this state

because the unit may

comes back below 80

, it cannot

CIRCUIT

inside the CA260

comes into operation

rises above 100

rises above 80

, decreasing

blinks. If the

C by natural cooling,

, the power supply

. Not only does the output stop, but

, even in

be always said that it

operate when the temperature

C by natural cooling.

is broken

, it

ToSw;tch;ng 03

:"' --Q

I ~'

--,0,----..2

D W i--

_138V

'" J

PROTECT

r~l

'~i...

ALIGNMENT PROCEDURES

(REFER TO PAGES 9 AND 10 )

-Idling current adjustment

Conditions:

-Connect the DC

between TP3 and TP4.

-Connect a 13.8V power

voltmeter between TPl and TP2 and

supply to the 12V

Power In terminal.

-After the power on

ing to be sure of the most stable operation.

, wait for 5 minutes before

Adjustment

Note: When replacing or disconnecting a resistor

Inspection:

-Confirm that the

(voltage: 33mV:t 13mV).

Battery

measur-

, disconnect the power supply first.

If the current

specified

, adjust it with the procedure below.

idling current is 50mA :t

20mA

measured does not fall within the range

Current

less than 29mA

71mA ~ 100mA

101mA ~ 200mA

201 mA ~ 250mA

more than 251 mA

less than 19mV

46mV ~ 66mV

67mV ~ 132mV

133mV ~ 165mV

more than 166m V Cut out R479 and R480.

After the adjustment is complete

properly.

BLOCK DIAGRAM

AMPLI FIER

Line Input

High Level Input

Input

Select

Switches

Voltage

Add R481 and R482 between TP5 and TP6 and between TP7 and TP8.

After cutting out R477 and R478

and TP6 and between TP7 and TP8.

After cutting out R479 and R480, add

and TP6 and between TP7 and TP8.

Cut out R477 and R478.

, let the unit settle down for

FILTER

10 minutes

Procedure

, add R481 and R482 between TP5

R481 and R482 between TP5

, than double-check that the idling current is set

Output

POWER

AMP

Input

Line Input Switches

Select

POWER SUPPLY

+13.

Remote

GND

Switching

Circui t

---0

High/Low Pass

Fi Iter Switch

FILTER

Protect Signa! Input

POWER

Output

AMP

+ 31.0V

- 31.0V

+ 35. 5 V

- 35. 5 V

GENERAL UNIT EXPLODED VIEW