Kenwood KRF-V7772D User Manual

AUDIO VIDEO SURROUND RECEIVER
KRF-V7772D
VR-3080
SERVICE MANUAL
© 1999-3/B51-5511-00 (K/K) 1841
POWER
ON/STANDBY
CLIP INDICATOR DOLBY DIGITAL DTS
SPEAKERS
A
B
MUTE
VOLUME
DOWN UP
INPUT SELECTOR
DISPLAY MODE
PHONES
S VIDEO
V AV AUX L-AUDIO-R
CD2/TAPE2
MONITOR
PRE OUT
FRONT
SURROUND CENTER
SUBWOOFER
AM
GND
FM
75Ω
ANTENNA
AUDIO
PHONO
CD1
MD/TAPE1
REC
OUT
PLAY
IN
VIDEO1
REC
OUT
PLAY
IN
VIDEO2
PLAY
IN
VIDEO3
PLAY
IN
VIDEO4
PLAY
IN
CD2/TAPE2
MONITOR
REC
OUT
PLAY
IN
FRONT SPEAKERS
(6-16Ω)
SURROUND SPEAKERS
(6-16Ω)
CENTER
SPEAKER
(6-16Ω)
SWITCHED
TOTAL 100W MAX.
S VIDEO
VIDEO
MONITOR
OUT
VIDEO1
REC
OUT
PLAY
IN
VIDEO2
PLAY
IN
VIDEO3
PLAY
IN
VIDEO4
PLAY
IN
DIGITAL IN
SL16
TEXT
SYSTEM
CONTROL
VIDEO2
OPTICAL OPTICAL COAXIALCOAXIAL
VIDEO3 VIDEO4 CD1
IR RECEIVER
IN
DC12V 15mA
IR REPEATER
OUT
IR OUT
LCD
REMOTE
SL16 XS8
Panel *
(A60-)
Panel escutcheon
(B01-0533-21)
Knob
(K29-6855-03)
Indicator
(B12-0333-04)
Knob
(K29-6855-03)
Front glass
(B10-2418-03)
Indicator
(B12-0326-04)
Front glass
(B10-2451-03)
Cylindrical receptacle
(E56-0012-05)
Foot
(J02-1405-03)
Phone jack
(E11-0271-05)
Knob
(K29-6858-12)
Indicator
(B12-0331-04)
Knob
(K29-6858-12)
Knob
(K29-6852-04)
AC power cord*
(E30-)
Slide switch
(S31-2132-05)
Phono jack
(E63-1028-05)
Cylindrical receptacle
(E56-0011-05)
Phono jack
(E63-0162-05)
Phono jack
(E63-0141-15)x2
Screw terminal board
(E70-0096-05)
*Refer to parts list on page37~.
Power cord bushing
(J42-0083-05)
Phono jack
(E63-1084-05)
Screw terminal board
(E70-0095-05)
Miniature phone jack
(E11-0360-05)
Miniature Phone jack
(E11-0291-05)
Optical receiving module
(W02-1181-05)
Lock terminal board
(E70-0052-05)
AC outlet *
(E03-)
Miniature Phone jack
(E11-0389-05)
Phono jack
(E63-0139-15)
Miniature Phone jack
(E11-0293-05)
Phono jack
(E63-1030-05)
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Kenwood KRF-V7772D Specifications

General

Type	AV Receiver
Tuner	FM/AM
Surround Sound Formats	Dolby Digital, DTS
Input Sensitivity/Impedance	200mV
Speaker Impedance	8 ohms
Tuner Frequency Range	FM: 87.5 to 108 MHz, AM: 531 to 1602 kHz
Power Output	100 watts per channel into 8 ohms (stereo)
Inputs	6 x RCA audio, 3 x RCA video, 2 x digital audio (optical), 1 x digital audio (coaxial), 6.1 x external input

Summary

Disassembly for Repair Procedures

Audio PCB (X09) Removal Steps

Steps to remove the audio PCB, including screw and hook references.

DSP PCB (X08) Access Steps

Procedure to access the DSP PCB, detailing screw removal and pin soldering.

Front Panel and Escutcheon Removal

Steps to remove the front panel, escutcheon, and related components.

Circuit Description

Initialization and Backup Conditions

Details on initial settings, backup items, and conditions for the unit.

Destination-Specific Settings

Test Mode Operation

Microprocessor and Peripheral Circuits

Microprocessor Pin Functionality

Selector IC and DSP Output Control

Codec CS4226 Configuration

Adjustment Procedures

FM Section Adjustment Details

Procedures for adjusting discriminator, distortion, and tuning level in the FM section.

Audio Section Idle Current Adjustment

Procedure for adjusting the idle current in the audio section.

System Connections for Adjustment

Diagram showing system connections required for performing adjustments.