Harman kardon hk 620 service manual

Page 1

The Harman Kardon
Model HK620
INTEGRATED AMPLIFIER

Manual 197A

Teceihiimi©ail Mamwiail

harman/kardon llKElu

The following marks found in the parts list of this manual
identify the models as follows:

133 : North America area model Black version

9: International model Black version

o : International model

m : Asia/Oceania model Black version

CONTENTS

SPECIFICATIONS ----------------------------
DISASSEMBLY PROCEDURES
CONTROLS AND FUNCTIONS
ALIGNMENT PROCEDURES
BLOCK DIAGRAM
(ENERAL UNIT»-
GENERAL UNIT PARTS LIST-
P.C.BOARDS ____________________________________
ELECTRICAL PARTS LIST
WIRING DIAGRAM ----------------
IC TERMINAL FUNCTION»-

IC BLOCK DIAGRAM ............................................... 13
INFRARED REMOTE CONTROL

SCHEMATIC DIAGRAM-
SCI'EMATIC DIAGRAM----
PI-BOO PHCNO P.C.BOARD OPTION
HOW TO INSTALL ------------------------
FiNERAL UNIT PARTS LIST--
F.GBOARD- ------------
WIRING DIAGRAM-~-
SCHEMATIC DIAGRAM»
ELECTRICAL PARTS LIST

harman/kardon

Parts and Service Office

80 Crossways Park West, Woodbury, NY. 11797
1112-HK620-A K9502 1500 Printed in Japan

Page 2

HK620 :

SPECIFICATIONS

RMS Output Power

Nominal Limit

8 £2,1kHz THD 0.1% 50.7w a 40W

4 S2, 1kHz THD 0.3% 69.4w ; 60W
High-instantaneous Current

Capability (HCC) 41A E 30A

Half Power Bandwidth (THD 0.1%)

Frequency Response
(at -3dB down)
Input Sensitivity
(at 40W output) Tuner/CD:

<1 OHz-GZkHZ <10HZ-50kHz

0.4Hz-106kHz

135mV >135mV :t: 35mV/17k9 i 5kQ

Option Phono (MM): 2.4mV/49kohm
Option Phono (MC): 131 V1569
Signal to Noise Ratio
Tuner/CD: 86.5dB ; 75d8
Option Phono (MM): 79dB
Option Phono (MC): 75dE|
Channel Separation (at 10kHz): 56.6dB ; 45dB
Option Phone (MM): 65d]!
Option Phone (MC): 65dB
IM Distortion FIatio (at 1W): 0.033% § 0.1%

<1Hz- 3 BOkHz

Damping Factor (at 1Hz):

Phone-Overload
Option Phono (MM):
Option Phono (MC):

Tone Control Characteristics
Bass (at 50Hz) Boost

Cut
Treble (at 1 OkHz) Boost
Cut
DC Output Voltage (at 89)
L channel
R channel
Idling Current (at 89)
Dimensions
(w x H x 0)
Weight

Power Supplies
North America area model
lntemationel and Asia/
Oceania models
Power Consumption

Nominal Limit
106 a 90

109mV
5.6mv

10dBi2dB
10dBt2dB
1DdB i2dB
10dBiZdB

OmViGOmV
OmViGCImV
75mA i 5mA
17.4' X 4.1' X141"
(443 X 104 X 359 mm)
16.3 lbs./7.4kg

AC 120V, 50Hz

AC zaov, 50/60Hz
wow (:9

180W®o®

These specifications are service target specs.

Specifications and components are subject to change without notice.
Overall performance will be maintained or Improved

DISASSEMBLY PROCEDURES (REFER TO PAGES mom
m CABINET TOP (131) REMOVAL

Remove 6 screws (A) and then remove the Cabinet
Top (131).

m FRONT PANEL ASSY (AA) REMOVAL

1.

2.
3.

Remove the Cabinet Top (131), referrlng to the pre-
vious step m.

Pull out a Rotary Knobs (151).

Remove 5 screws (B) and then remove the Front
Panel Aes'y (AA).

El MAIN P.C. BOARD (PCB-1) REMOVAL

1.
2.

3.

Remove the Front Panel Assy (AA), referring to the
previous step [2].

Disconnect the Connector (CW703) from 1 Connector
(CN703) on the CPU P.C. Board (PCB<5).

Pull out the Rotary Knob (150) and 2 Push Buttons
(146).

. Disconnect the 3 Connectors (JL501, CW704 and

W-502) from 3 Connectors (CN503, CN704 and H503)
on the VR P.C. Board (PCB-10).

. Disconnect the Jumper Lead (JL702) from Connector

(CN7OZB) on the Main P.C. Board (PCB-1).

. Remove 3 hexagon nuts (C).
. Remove 8 screws (D) and then remove the Chassis

(161) with CPU P.C. Board (PCB-5), Power LED P.C.
Board (PCB-7), VR P.C. Board (PCB-10) and SP SW
P.C. Board (PCB-2).

. Remove 11 screws (E) and then remove the Main P.C.

Board (PCB-1).
If necessary unsolder the lead wire.

(1) CPU P.C. BOARD (PCB-5) REMOVAL

1.

2.

3.

Remove the Cabinet Top (131), referring to the pre-
vious step III.

Disconnect the Jumper Lead (JL702) from Connector
(CNTDZA) on the CPU P.C. Board (PCB-5).

Disconnect the Connector (CW703) from Connector
(CN703) on the CPU P.C. Board (PCB-5).

. Disconnect the Connector (CW701) from Connector

(CN701) on the Power Ind P.C. Board (PCB-7).

. Disconnect the Connector (CW282) from Connector

(CN282) on the I/O P.C. Board (PCB-6).

. Remove 4 screws (F) and then remove CPU P.C.

Board (PCB-5).

El
1.

2.
3.

PE

AUN

1.

2.

VOLUME P.C. BOARD (PCB~1D) REMOVAL

Remove the Front Panel Ass'y (AA), referring to the
previous step m.

Disconnect the Connector (CW703) from Connector
(CN703) on the CPU P.C. Board (PCB-5).

Disconnect 3 Connectors (JL501, CW704 and W-502)
from a Connectors (CN503. CN704 and H503) on the
Volume P.C. Board (PCB-10).

. Remove hexagon nut (G) and then remove the Vol-

ume P.C. Board (PCB-10).

i/O P.C. BOARD (PCB-6) REMOVAL

Remove the Cabinet Top (131). referring to the pre-
vious step II].

. Remove 2 screws (H) and then remove SP Terminal

P.C. Board (PCB-4).

. Disconnect the Connector (PG1) from Connector

(CN1) on the I/O P.C. Board (PCB-6).

. Disconnect 2 Connectors (CW281 and CW252) from 2

Connectors (CN281 and CN282) on the l/O P.C. Board
(PCB~6).

. Remove 5 screws (I) and then remove l/O P.C. Board

(PCB-6).

OPTION PHONO P.C. BOARD (PCB-101) REMOVAL
Remove the Cabinet Top (131), referring to the pre-
vious step II).

Remove 1 screw (199) end then disconnect 2 Connec-
tors (CW602 and W601) from 2 Connectors (CN102
and CN101) on the Main P.C. Board (PCB-1).