Circuit Description - Kenwood KRF-V7771D Service Manual

1. The back up item and initialization
condition
1-1 Back up
• POWER ON/OFF
• VOLUME LEVEL
• AUDIO INPUT • SELECTOR : TUNER
• VIDEO INPUT • SELECTOR : VIDEO1
• SPEAKER A
• SPEAKER B
• CD2/TAPE2 MONITOR
• TONE
• LOUDNESS
• DISPLAY MODE
• RDS DISPLAY MODE
• DIMMER
• SURROUND MODE
• Re-EQ
• DSP MODE
• WALL TYPE
• EFFECT LEVEL
• MIDNIGHT MODE
• DISTANCE
• FRONT SP.
• CENTER SP.
2. Condition by the destination or model
Reception
TYPE BAND
frequency
FM 87.5MHz~108.0MHz
K1
1700
AM 530kHz~1700kHz
FM 87.5MHz~108.0MHz
K2
1610
AM 530kHz~1610kHz
FM 87.5MHz~108.0MHz
K4
1700 RBDS
AM 530kHz~1700kHz
FM 87.5MHz~108.0MHz
E1
AM 531kHz~1602kHz
FM 87.5MHz~108.0MHz
E3
AM 531kHz~1602kHz
RDS
FM L 65.0MHz~74.0MHz
Q1
FM H 87.5MHz~108.0MHz
RDS
AM 531kHz~1602kHz
K2/E1 is switched with only the setting of DSW1 (X11 : S601).
M
(DSW1 = 0 : K2 type, 1 : E1 type)
3. TEST MODE
[setting method]
While pressing INPUT SELECTOR key, plug the AC
power cord into an AC outlet (K, P type) or turn on the
AC POWER switch with condition VIDEO4 SW(2ch) on
the rear panel. When a set is set up in test mode
condition a set becomes the following condition.

CIRCUIT DESCRIPTION

: OFF
: -66dB
: ON
: OFF
: TAPE2 OFF
: OFF
: OFF
: DEVICE+DGTL/ANLG
: FREQUENCY
: DIMMER 1 (LIGHTEST)
: STEREO
: OFF
: ARENA
: Med
: 3
: OFF
: FL/FR : 10ft (3m)
: C : 10ft (3m)
: RS/LS : 5ft (1.5m)
: SW : 10ft (3m)
: LARGE
: NORMAL
Channel
space
100kHz +10.7MHz
10kHz +450kHz
100kHz +10.7MHz
10kHz +450kHz
100kHz +10.7MHz
10kHz +450kHz
50kHz +10.7MHz
9kHz +450kHz
50kHz +10.7MHz
9kHz +450kHz
10kHz +10.7MHz
50kHz +10.7MHz
9kHz +450kHz
KRF-V7771D/V7771DE
• SURROUND SP.
• SUB WOOFER
• SW Re-Mix
• INPUT LEVEL
• CH. LEVEL
• BASS PEAK LEVEL
• TONE BASS
• TONE TREBLE
• TUNING MODE
• PRESET MEMORY
FREQUENCY (Same value with KR-V999D/1090VR)
• LAST BAND
• FM LAST FREQUENCY
• AM LAST FREQUENCY
• LAST P. ch
• PTY SELECT MODE
• PTY SEARCH MODE
• TP SEARCH MODE
• RDS DISPLAY MODE
1-2 The initial setting
While pressing POWER key, plug the AC power cord into
an AC outlet (K,P type) or turn on the AC POWER
switch.
PLL standard
IF
frequency
DSW3
77
25kHz
0
10kHz
25kHz
0
10kHz
25kHz
1
10kHz
25kHz
0
9kHz
25kHz
0
9kHz
5kHz
5kHz
1
9kHz
0
Automatic POWER ON. All indicator tube (FL) and CLIP
INDICATOR LED are lighted. The other LED are flashed.
A backup at the thing except ON/OFF of POWER is
initialized.
[cancel method]
The power supply is turned off.
: NORMAL/WIRED
: ON
: OFF
: 0dB
: 0dB
: OFF
: 0dB
: 0dB
: AUTO
: TEST MEMORY
: FM
: 87.5MHz
: 531kHz (CH. SP 9kHz)
: 530kHz (CH. SP 10kHz)
: [- -ch]
: OFF
: OFF
: OFF
: FREQUENCY MODE
(0 : Pull down, 1 : Pull up)
Diode sw
DSW2 DSW1 DSW0
76 75 74
0 0 0
0 0 1
0 1 0
0 1 1
1 0 1
0 1 1
0 X 1
7