Panasonic Dvd Home Theater Sound System Sc Ht680 Operating Instructions

							21
RQT7969
Changing the player settings
∫“Audio” tab
∫“Display” tab
∫“Others” tab
(Effective when playing multi-channel audio)
(Center and surround speakers only)
For optimum listening with 5.1-channel sound, all the speakers, 
except for the subwoofer, should be the same distance from the 
seating position. If you have to place the center or surround 
speakers closer to the seating position, adjust the delay time to 
make up for the difference.
If either distance a or b is less than c, find the difference in the 
table and change to the recommended setting.1 Press [3,4] to select the delay time box and press 
[ENTER].
2 Press [3,4] to adjust the delay time and press [ENTER].
To finish the speaker setting
Press [2] to select “Exit” and press [ENTER].
When you change the surround speaker setting for Dolby Digital, the 
setting also changes for Dolby Pro LogicII.
e.g., the settings for MUSIC are the same as those for Dolby Digital.
TV Type
Select to suit the type of television.
≥Standard (Direct View TV)≥CRT Projector≥LCD TV/Projector
≥Projection TV≥Plasma TV
Time Delay
When connected with a Plasma 
display, adjust if you notice the audio 
is out of sync with the video.≥0ms
≥20ms≥40ms≥60ms≥80ms≥100ms
Still Mode
Specify the type of picture shown 
when paused.≥Automatic≥Field: The picture is not blurred, but picture quality is lower. 
≥Frame:
Overall quality is high, but the picture may appear blurred. 
Black Level Control
Change the black level of the picture if 
you connected a television through the 
COMPONENT VIDEO OUT terminals.
≥Lighter: When connected through VIDEO OUT or S-VIDEO OUT.
≥Darker: When connected through COMPONENT VIDEO OUT (Y/PB/PR).
Dynamic Range Compression≥Off≥On: Adjusts for clarity even when the volume is low by compressing the range of the lowest sound 
level and the highest sound level. Convenient for late night viewing. (Only works with Dolby 
Digital)
Speaker Settings (➜below)
Set the delay time for your center and 
surround speakers.≥Center: 0.0
/1.0/2.0/3.0/4.0/5.0 ms
≥Surround (L/R): 0.0/5.0/10.0/15.0 ms
Menu Language≥English≥Français≥Español
On-Screen Messages≥On≥Off
FL Dimmer
Changes the brightness of the unit’s 
display.≥Bright
≥Dim
≥Auto: The display is dimmed, but brightens when you perform some operations.
QUICK SETUP≥Ye s≥No
Re-initialize Setting
This returns all values in the Setup 
menus to the default settings.≥Yes: The password screen is shown if “Ratings” (➜page 20) is set. Please enter the same 
password. After “INIT” on the display disappears, turn the unit off and on again.
≥No
Changing the delay time (Speaker Settings)
a Center speakerb Surround speaker
Difference (Approx.)SettingDifference (Approx.)Setting
30 cm (1 foot) 1.0 ms 150 cm (5 feet)  5.0 ms
60 cm (2 feet) 2.0 ms 300 cm (10 feet) 10.0 ms
90 cm (3 feet) 3.0 ms 450 cm (15 feet) 15.0 ms
120 cm (4 feet) 4.0 ms
150 cm (5 feet)  5.0 ms
L
LS
R
SW
C
RS
C
RSLS
b
c aa
b
c
Approximate room dimensions
Circle of constant primary listening distance: Actual speakers position
: Ideal speakers position
: Primary listening distance
Dolby DigitalDolby Pro LogicII
MUSICMOVIE
0ms 0ms 10ms
5ms 5ms 15ms
10 ms 10 ms 20 ms
15 ms 15 ms 25 ms
ms
ms L
Exit
LSR
SW
C
RS 0.0
 0.0
Center delay time
Exit
Surround delay time
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RQT7969
Sound field and sound quality
Sound field and sound quality
[Note]
≥When connected with headphones, the following sound field 
systems have no effect. (Excluding Sound Field Control)
≥You may experience a reduction in sound quality when these 
sound field systems are used with some sources. If this occurs, 
turn the sound field system off.
≥If you turn on Super Surround, Dolby Pro LogicII is canceled and 
vice versa.
Changes the sound quality.
Press [SFC].
Each time you press the button:
FLAT:Cancel (no effect is added) (factory preset).
HEAVY:Adds punch to rock.
CLEAR:Clarifies higher sounds.
SOFT:For background music.
DISCO:Reverberates sound to make you feel like you are in a 
disco.
LIVE:Makes vocals more alive.
HALL:Expands sound to make you feel like you are in a hall.
To check the current setting
Press [SFC].
Adds surround effects to stereo sound.
Press [SUPER SRND].
Each time you press the button:
MUSIC:Adds surround effects to stereo 
sources.
MOVIE:Use this mode when playing movie 
software.
PA R T Y :Sound is in stereo regardless of the direction you are 
facing.
OFF:Cancel
≥You can adjust the volume of the surround speakers to get the best 
surround effect (➜page 23, Speaker level adjustments).
≥Super Surround does not work when playing a DVD recorded with 
a multi-channel source.(Discs where the dialogue is recorded in the center channel)
You can make the sound of the center speaker seem 
like it is coming from within the television.
Press [SHIFT]i[C.FOCUS].
Each time you press the button:
C FOCUS ON,------.C FOCUS OFF
≥This does not work when Super Surround is turned on.
≥This also works when Dolby Pro LogicII is turned on.
Dolby Pro LogicII is an advanced decoder that derives 5-channel 
surround (Left and Right Front, Center, Left and Right Surround) 
from any stereo program material, whether or not it has been 
specifically Dolby Surround encoded.
Press [ÎPLII].
Each time you press the button:
MOVIE:Movie software, recorded in Dolby 
Surround.
MUSIC:Stereo sources
OFF:Cancel
≥This works only in DVD/CD mode.
≥“ÎPLII” lights when there is effect.
You can output the down-mixed 2 channel signals when necessary.
Press [SHIFT]i[MIX 2CH].
Each time you press the button:
MIX 2CH ON,------.MIX 2CH OFF
≥When “D.MIX” flashes on the display, the disc contains multiple-
channel signals that cannot be down-mixed. [DVD-A]
You can adjust the amount of bass. The unit automatically selects 
the most suitable setting according to the type of playing source.
Press [SUBWOOFER LEVEL].
≥When DVD-Video or DVD-RAM is selected
SUB W 4 (factory preset)>SUB W 1>SUB W 2>SUB W 3
^--------------------------------------------------------------------------}
≥When another source is selected
SUB W 2 (factory preset)>SUB W 3>SUB W 4>SUB W 1
^--------------------------------------------------------------------------}
The setting you make is retained, and recalled every time you play 
the same type of source.
Sound Field Control
Super Surround
VOLUME
CH
SKIPSLOW/SEARCH
MENU
DIRECT
NAVIGATOR
TOP MENU
RETURN
FUNCTIONS
VCRTV
TUNER/BANDTV/VIDEO
     AUXDISC
ENTER
SUBWOOFER
LEVELSUPER SRNDC.FOCUS
SFC
CD MODE
PLAY MODE
TEST
CH SELECTSETUP
MUTINGMIX 2CHPL
ZOOM
CM SKIPSUBTITLE
AUD IO
PLAY SPEED
QUICK REPLAY
SLEEP
QUICK OSD
ADVANCEDDISC REVIEW
FL DISPLAY REPEAT
SHIFT
ANGLE/PAGE
GROUP
AV SYSTEM
DVD/CD
PLAY 
LIST
TV VOLTV VOL
ENTER
12
6
9 45
78
CANCEL0
10
3
SHIFT
SUBWOOFER LEVEL
SUPER SRNDC.FOCUS, SFC VOLUME
TEST, CH SELECT MIX 2CH,       PL
, , , 
    SLEEPMUTING
DVD/CD
C.FOCUS
SFC
SUPER SRND
S.SRND
Center Focus
Dolby Pro LogicII
Down-mixing
Subwoofer level
SHIFTC.FOCUS
SFC
MIX 2CHPL
PL
SHIFTMIX 2CHPL
SUBWOOFER
LEVEL
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RQT7969
This is one of the ways to get appropriate surround effects.
Preparation
Press [DVD/CD].
1While stopped and no on-screen display is shown
Press [SHIFT]i[TEST] to output a test 
signal.
L: Front left  C: Center  R: Front right
RS: Right surround LS: Left surround
≥There is no output from SW (subwoofer) channel.
2Press [VOLUME, r] or [s] to set the 
volume level normally used for listening.
3Press [3] (increase) or [4] (decrease) to 
adjust the speaker level for each speaker.
C, RS, LS: `6dB to i6dB
(L, R: Only the balance is adjustable.)
≥To adjust the balance of the front speakers
While outputting the test signal, press [2,1].
≥Adjust the speaker level to the same level as the front 
speakers.
To stop the test signal
Press [SHIFT]i[TEST] again.
∫To adjust speaker level during play
(Effective when playing multi-channel audio or when Dolby Pro 
LogicII or Super Surround is on.)
1Press [CH SELECT] to select the speaker. 
L #C #R #RS #LS #SW
^-------------------------------------------------}
SW: Subwoofer
≥You can adjust SW only if the disc includes a subwoofer 
channel.
≥“SW” does not appear on the display and is not adjustable 
when Dolby Pro LogicII is turned on.
≥“S” appears on the display when “MUSIC” or “MOVIE” is 
selected with Super Surround (➜page 22). In this case, you 
can adjust both surround speaker levels at the same time 
using [3,4].
S: 
`6dB to i6dB
2Press [3] (increase) or [4] (decrease) to adjust the 
speaker level for each speaker.
C, RS, LS, SW: `6dB to i6dB 
(L, R: Only the balance is adjustable.)
≥To adjust the balance of the front speakers
While “L” or “R” is selected, press [2,1].
Speaker level adjustmentsSHIFTTEST
CH SELECT
Other useful functions
Press [SHIFT]i[SLEEP] to select the time (in 
minutes).
SLEEP 30_----)SLEEP 60_----)SLEEP 90
  ^""""" OFF(_ SLEEP 120(__}
To cancel the timer
Press [SHIFT]i[SLEEP] to select “OFF”.
To confirm the remaining time
Press [SHIFT]i[SLEEP] again.
To change the setting
Repeat the procedure from the beginning.
Press [MUTING].
“MUTING” flashes on the unit’s display.
To cancel
≥Press [MUTING] again or reduce the volume to minimum (-- -- dB), 
then raise it to the required level.
≥Muting is canceled when you switch the unit to standby.
1Reduce the volume and connect the 
headphones (not included).
Headphone plug type: 3.5 mm (1/8z) stereo
2Adjust headphone volume with 
[VOLUME].
≥Audio is automatically switched to stereo (2-channel).
[Note]
Avoid listening for prolonged periods of time to prevent hearing 
damage.
Sleep timer
Muting
Using headphones
SHIFTSLEEP
QUICK OSD
SLEEP
SETUP
MUTING
C
Main unit only
1234 5OPENCLOSEDISC CHANGEDISC CHECKSELECTOR
TUNE MODEFM MODE MEMORY
PROGRESSIVECD MODEDISC
POWER
DOWNUPPHONES
VOLUMEAC IN
TUNING
VOLUME
Sound field and sound quality/Other useful functions
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RQT7969
The radio
The radio
Up to 15 stations can be set in each band, FM and AM.
1Press [SELECTOR] to select “FM” or “AM”.
2Press [TUNE MODE] to select “MANUAL”.
Each time you press the button: MANUAL()PRESET
3Press [XTUNINGW] to tune to the lowest 
frequency (FM: 87.9 or 87.5, AM: 520).
4Press and hold [MEMORY].
Release the button when “FM AUTO” or “AM AUTO” is 
displayed.
The tuner presets all the stations it can receive into the 
channels in ascending order.
≥“SET OK” is displayed when the stations are set, and the 
radio tunes to the last preset station.
≥“ERROR” is displayed when automatic presetting is 
unsuccessful. Preset the channels manually (➜below).
1Press [SELECTOR] to select “FM” or 
“AM”.
2Press [TUNE MODE] to select “MANUAL”.
3Press [XTUNINGW] to select the 
frequency.
Press and hold [XTUNINGW] until the frequency starts 
scrolling to start automatic tuning. Tuning stops when a station 
is found.
∫Presetting the channel
Up to 15 stations can be set in each band, FM and AM.
1While listening to the radio broadcast
Press [ENTER].
2While the frequency and “PGM” are flashing on the display
Press the numbered buttons to select a channel.
Alternatively, press [WCHX], then press [ENTER].
≥To select a 2-digit number
e.g. 12: [S10] ➜ [1] ➜ [2].
The station occupying a channel is erased if another station is preset 
to that channel.
1Press [TUNER/BAND] to select “FM” or 
“AM”.
2Press the numbered buttons to select the 
channel.
Alternatively, press [WCHX]
To select a 2-digit number
e.g. 12: [S10] ➜ [1] ➜ [2]
When a stereo FM broadcast is being received.
∫If noise is excessive in FM
Press [FM MODE] to display “MONO”.
Press [FM MODE] again to cancel the mode.
The mode is also canceled when you change the frequency.
∫FM frequency step
You can change the FM step. The step is factory-set to 0.2 MHz, but 
you can change it to receive broadcasts allocated in 0.1-MHz steps.
1 Press [SELECTOR] to select “FM”.
2 Press and hold [SELECTOR].
After a few seconds the display changes to show the current 
minimum frequency. Continue to hold the button down. The 
minimum frequency changes and the step is changed.
To return to the original step, repeat the above steps.
[Note]
Any FM/AM frequencies preset in channels will be changed by this 
procedure. Preset them again.
Automatic presetting
Manual tuning
1234 5OPENCLOSEDISC CHANGEDISC CHECKSELECTOR
TUNE MODEFM MODE MEMORY
PROGRESSIVE CD MODEDISC
POWER
DOWN UPPHONES
VOLUMEAC IN
TUNING
SELECTOR TUNING
TUNE MODEMEMORY FM MODE
Main unit only
Main unit only
Selecting the preset channels
VOLUME
CH
SKIPSLOW/SEARCH
MENU
DIRECT
NAVIGATOR
TOP MENU
RETURN
FUNCTIONS
VCRTV
TUNER/BANDDISC
ENTER
AV SYSTEM
DVD/CD
PLAY 
LIST
TV VOLTV VOL
ENTER
12
6
9 45
78
CANCEL0
10
3
TV/VIDEO
AUX
ENTERTUNER/BAND
CH
Numbered
buttons
TUNEDST
Main unit only
TUNEDMONO
Main unit only
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RQT7969
Operating other equipment
Operating other equipment
You can use the remote control to operate a Panasonic television or a video cassette recorder. Connect your equipment referring to “Connection 
example” (➜above).
[Note]
The remote control may not work properly with some models.
Preparation
Aim the remote control at the unit and press [TV] to light up the 
button, and then aim it at the television for the following operations:
Turning the television on/off
Press [ÍAV SYSTEM].
Switching the television’s video input mode
Press [SHIFT]i[TV/VIDEO].
Changing channels
Press [WCHX].
≥[S10/ENTER] is used to confirm channel selection on some 
televisions manufactured by other companies.
Adjusting the volume
Press [TV VOLs] or [TV VOLr].Preparation
≥Change the video input mode on the television (“VIDEO 2” in the 
example).
≥Aim the remote control at the unit and press [VCR] to light up the 
button, and then aim it at the video cassette recorder for the 
following operations:
Turning the video cassette recorder on/off
Press [ÍAV SYSTEM].
Play, pause and stop
Press [1] (play), [;] or [∫].
Fast forward and rewind
Press [6] or [5].
Connecting a laser disc, tape or record player
Connect instead of a video cassette recorder (➜above) and select 
“AUX” as the source.
We recommend using a record player with a built-in phono equalizer. 
If your player doesn’t have a built-in equalizer, connect it first to a 
separate equalizer and then to the unit.
This remote control can also operate some other brands of 
televisions and video cassette recorders. Change the code to 
operate such equipment (➜back cover).
Aim the remote control at the equipment.
While pressing [TV] or [VCR]
Press a numbered button to enter the first 
digit, and then the second digit.
The remote control outputs the on/off signal. If the code is correct, 
the equipment turns on or off. If it doesn’t, try entering another code.
[Note]
Reenter the codes after you change the batteries.
AC IN
RLRL
L
R
COMPONENT COMPONENT VIDEO OUTVIDEO OUT(480p/480i)(480p/480i)PR
PBY
S-VIDEOS-VIDEOOUTOUTAUXAUX
SUBWOOFERFRONT
FM ANT75
AM ANTSPEAKERS
LOOPEXT
CENTER SURROUND
VIDEOVIDEOOUTOUT
VIDEO OUT AUDIO OUT
RL
AUDIO OUT
RL
VIDEO IN
2
1
Television
(not included)Video cassette recorder(not included) To show video from the video 
cassette recorder
Select “VIDEO 2” input on your 
television in this example.
Already connected 
(➜page 6)Connect instead of the 
television to play audio from 
the video cassette recorder
Audio cable
(not included)
Video cable
(not included)
: Signal flow To play audio from the television
Reduce the volume on the television 
to its minimum and control the 
volume on this unit.
∫Connection example
Operating the television and the video cassette recorder
Te l ev i s i o n
VOLUME
CH
SKIPSLOW/SEARCH
MENU
DIRECT
NAVIGATOR
TOP MENU
RETURN
FUNCTIONS
VCRTV
TUNER/BANDDISC
SUBWOOFER
LEVEL SUPER SRNDC.FOCUS
SFC
CD MODE
PLAY MODE
TEST
CH SELECTSETUP
MUTINGMIX 2CHPL
ZOOM
CM SKIPSUBTITLE
AUD IO
PLAY SPEED
QUICK REPLAY
SLEEP
QUICK OSD
ADVANCEDDISC REVIEW
FL DISPLAY REPEAT
SHIFT
ANGLE/PAGE
GROUP
AV SYSTEM
DVD/CD
PLAY 
LIST
TV VOLTV VOL
ENTER
ENTER
12
6
9 45
78
CANCEL0
10
3
TV/VIDEO
AUX
TV VOLCH
, TV/VIDEO,
AUX 
TV VOL
AV SYSTEM
10/ENTER
SHIFT
TV
VCR
Numbered
buttons
Video cassette recorder
Changing the remote control code
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RQT7969
Other speaker setup options
Other speaker setup options
∫Attaching to a wall
You can attach all of the speakers to a wall.
1Drive a screw (not included) into the wall.
2Fit the speaker securely onto the screw(s) with the hole(s).
≥The wall or pillar on which the speakers are to be attached should be 
capable of supporting 10 kg (22 lbs) per screw. Consult a qualified 
building contractor when attaching the speakers to a wall. Improper 
attachment may result in damage to the wall and speakers.
≥Use of optional speaker cables is recommended for wall-mounted 
front speakers. (You can also remove the speaker cables from the 
pipes supplied with this system).
∫Fitting speaker stands (not included)
(Except Front speakers)
Ensure the stands meet these conditions before purchasing them.
Note the diameter and length of the screws and the distance between screws as shown in the diagram.
≥The stands must be able to support over 10 kg (22 lbs).
≥The stands must be stable even if the speakers are in a high position.
30 – 35 mm
(13/16q–13/8q)
‰7.5–9.4 mm
(
19/64q–3/8q)
4.0–7.0 mm
(
5/32q–9/32q)
Wall or pillar ‰3.0–4.0 mm
(
1/8q–5/32q)
180 mm
(73/32z)Surround speaker Front speaker
Center speaker
In this position, the speaker will likely fall 
if moved to the left or right.Move the speaker so the screw is in this position.
Speaker stand
(not included)
Plate thickness
plus 7 mm to 10 mm (plus 
9/32q to 13/32q) Surround speaker e.g.
5mm (
3/16q), pitch 0.8 mm (1/32q)
Attach the stands to these 
metal screw holes.60 mm (2
3/8q)
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RQT7969
Specifications
Specifications
AMPLIFIER SECTION
RMS Output Power: Dolby Digital Mode
Front Ch 55 W per channel (6 ≠), 1 kHz, 10 % THD
Surround Ch  55 W per channel (6 ≠), 1 kHz, 10 % THD
Center Ch  160 W per channel (6 ≠), 1 kHz, 10 % THD
Subwoofer Ch  220 W per channel (4 ≠), 100 Hz, 10 % THD
Total RMS Dolby Digital mode power  600 W
FTC Output Power: Dolby Digital Mode
Front Ch 35 W per channel (6 ≠), 120 Hz – 20 kHz, 1 % THD
Surround Ch 35 W per channel (6 ≠), 120 Hz – 20 kHz, 1 % THD
Center Ch 110 W per channel (6 ≠), 120 Hz – 20 kHz, 1 % THD
Subwoofer Ch 140 W per channel (4 ≠), 45 Hz – 120 Hz, 1 % THD
Total FTC Dolby Digital mode power 390 W
FM/AM TUNER, TERMINALS SECTION
Preset stationFM 15 stations
AM/MW 15 stations
Frequency Modulation (FM)
Frequency range 87.9 – 107.9 MHz (200-kHz step)
87.5 – 108.0 MHz (100-kHz step)
Sensitivity 2.5 µV (IHF)
S/N 26 dB 2.2 µV
Antenna terminals 75≠ (unbalanced)
Amplitude Modulation (AM/MW)
Frequency range 520 – 1710 kHz (10-kHz step)
AM Sensitivity S/N 20 dB at 1000 kHz 560 µV/m
Phone jack
Terminal Stereo, 3.5 mm (
1/8z) jack
DISC SECTION
Discs played [8 cm (3z) or 12 cm (5z)]
(1) DVD-RAM (DVD-VR compatible, JPEG formatted discs)
(2) DVD-Audio
(3) DVD-Video
(4) DVD-R, DVD-RW (DVD-Video compatible)
iR, iRW (Video compatible)
(5) CD-Audio (CD-DA)
(6) Video CD
(7) SVCD (Conforming to IEC62107)
(8) CD-R/RW (CD-DA, Video-CD, SVCD, MP3, WMA, JPEG 
formatted disc)
(9) MP3/WMA
§1
≥Compatible compression rate:
MP3: between 32 kbps and 320 kbps
WMA: between 48 kbps and 320 kbps
(10) JPEG
§1
≥Exif Ver 2.1 JPEG Baseline files
≥Picture resolution: between 320k240 and 6144k4096 pixels 
(sub sampling is 4:2:2 or 4:2:0)
(11) HighMAT Level 2 (Audio and Image)
§1The total combined maximum number of recognizable audio 
and picture contents and groups: 4000 audio and picture 
contents and 400 groups.
Pick up
Wavelength CD 785 nm
DVD 662 nm
Laser power[U.S.A.[ CLASS IIa/CLASS I
[Canada[ CLASS 2/CLASS 3A
Audio output (Disc)
Number of channels 5.1ch (FL, FR, C, SL, SR, SW)
VIDEO SECTION
Video system
Signal system NTSC
Composite video output
Output level 1 Vp-p (75≠)
Terminal Pin jack (1 system)
S-video output
Y output level 1 Vp-p (75≠)
C output level NTSC; 0.286 Vp-p (75≠)
Terminal S terminal (1 system)
Component video output (480p/480i)
Y output level 1 Vp-p (75≠)
P
B output level 0.7 Vp-p (75≠)
PR output level 0.7 Vp-p (75≠)
Terminal Pin jack (Y: green, P
B: blue, PR: red) (1 system)
SPEAKER SECTION
[Front\speakers\SB-FS680]
Ty p e2 way, 2 speaker system (Bass reflex)
Speaker unit(s)Impedance 6≠
1. Full range 6.5 cm (2
1/2z) Cone type
2. Super tweeter Piezo type
Input power (IEC)55 W (Max)
Output sound pressure80 dB/W (1.0 m)
Cross over frequency 10 kHz
Frequency range80 Hz – 22 kHz (j16 dB)
95 Hz – 20 kHz (j10 dB)
Dimensions (WtHtD)
218 mmk1080 mm (Max)/984 mm (Min)k243 mm
(8
19/32zk421/2z (Max)/383/4z (Min)k99/16z)
Mass2.6 kg (5.7 lbs)
[Surround\speakers\SB-FS681]
Ty p e1 way, 1 speaker system (Bass reflex)
Speaker unit(s)Impedance 6≠
Full range 6.5 cm (2
1/2z) Cone type
Input power (IEC)55 W (Max)
Output sound pressure80 dB/W (1.0 m)
Frequency range88 Hz – 25 kHz (j16 dB)
100 Hz – 22 kHz (j10 dB)
Dimensions (WtHtD)90 mmk193 mmk102 mm
(3
17/32zk719/32zk41/32z)
Mass0.7 kg (1.54 lbs)
[Center\speaker\SB-PC680]
Ty p e2 way, 3 speaker system (Bass reflex)
Speaker unit(s)Impedance 6≠
1. Full range 6.5 cm (2
1/2z) Cone type
2. Full range 6.5 cm (21/2z) Cone type
3. Super tweeter Piezo type
Input power (IEC)160 W
§ (Max)
Output sound pressure83 dB/W (1.0 m)
Cross over frequency 10 kHz
Frequency range103 Hz – 25 kHz (j16 dB)
116 Hz – 22 kHz (j10 dB)
Dimensions (WtHtD)320 mmk88 mmk96 mm
(12
19/32zk315/32zk325/32z)
Mass1.3 kg (2.9 lbs)
[Subwoofer\SB-W680]
Ty p e1 way, 1 speaker system (Bass reflex)
Speaker unit(s)Impedance 4≠
Subwoofer 17 cm (6
3/4z) Cone type
Input power (IEC)220 W (Max)
Output sound pressure86 dB/W (1.0 m)
Frequency range35 Hz – 500 Hz (j16 dB)
50 Hz – 250 Hz (j10 dB)
Dimensions (WtHtD)270 mmk287 mmk283 mm
(10
5/8zk115/16zk115/32z)
Mass4.1 kg (9 lbs)
GENERAL
Power supply120 V, 60 Hz
Power consumptionMain unit 280 W
Dimensions (WtHtD)430 mmk105 mmk381 mm
(1
615/16zk41/8zk15z)
MassMain unit  7.1 kg (15.7 Ibs)
Operating temperature ranger5oC to r35oC (r41oF to r95oF)
Operating humidity range5% to 90% RH (no condensation)
§ Rating with low cut filter equipped amplifier
[Note]
1. Specifications are subject to change without notice.
Mass and dimensions are approximate.
2. Total harmonic distortion is measured by a digital spectrum 
analyzer. Power consumption in standby modeapprox. 0.5 W
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RQT7969
Troubleshooting guide
Troubleshooting guide
Before requesting service, make the following checks. If you are in doubt about some of the check points, or if the solutions indicated in the chart 
do not solve the problem, refer to the “Customer Services Directory” on page 31 if you reside in the U.S.A., or refer to the “Product information” on 
page 30 if you reside in Canada.
PowerPage
Unresponsive or inoperable function
Specific operation undesirable or unexpected
Subtitle
Marker
A-B repeat
Sound abnormal or improper
No power.≥Insert the AC power supply cord securely.7
The unit is automatically 
switched to the standby mode.≥The Sleep timer was working and had reached the set time limit.23
No response when any buttons 
are pressed.≥This unit cannot play discs other than the ones listed in these operating instructions.
≥The unit may not be operating properly due to lightning, static electricity or some other external 
factor. Turn the unit off and then back to ON. Alternatively, turn the unit off, disconnect the AC 
power supply cord, and then reconnect it.
≥Condensation has formed: Wait 1 to 2 hours for it to evaporate.
9
—
—
No response when remote 
control buttons are pressed.≥Check that the batteries are installed correctly.
≥The batteries are depleted. Replace them with new ones.
≥Aim the remote control at the display and operate.7
7
8
Cannot play DVD’s.≥CD Mode is on. Press [SHIFT]i[CD MODE] to turn CD Mode off.12
No picture or sound.≥Check the video or audio connection.
≥Check the power or input setting of the connected equipment.
≥Check that the DVD-RAM has something recorded on it.4, 6, 
25
—
—
You have forgotten your ratings 
password.
Reset all the settings to Factory 
Preset.≥While stopped and “DVD/CD” is the source, press and hold [∫] on the main unit and [S10] on 
the remote control until “Initialized” disappears from the television. Turn the unit off and on again.
All settings will return to the default values.—
It takes time before play starts. 
[MP3]≥Play may take time to begin when an MP3 track has still picture data. Even after the track starts, 
the correct play time will not be displayed. This is normal.—
Folders deeper than the eighth 
layer on a data CD are not displayed 
correctly.
 [WMA] [MP3] [JPEG]≥Folders deeper than the eighth layer are displayed as the eighth layer.—
A menu screen appears during 
skip or search. [VCD]≥This is normal for Video CD’s.—
Playback control menu doesn’t 
appear. [VCD] 
with playback control≥Press [∫] twice and then press [1] (play).—
The program and random play 
functions do not work. [DVD-V]≥These functions do not work with some DVD-Videos.—
Programmed items are not 
played. [DVD-V]≥Some items cannot be played even if you have programmed them.—
The on-screen menu shows “2” 
as a soundtrack option when 
[AUDIO] is pressed, but the 
audio does not change. [DVD-A]≥Even if a second soundtrack isn’t recorded, two numbers will normally be shown.—
Play restarts from the beginning 
of the track when soundtrack is 
changed. [DVD-A]≥This is normal on DVD-Audio.—
Scenes are skipped 
intermittently. [RAM] [DVD-V]≥If you change the volume or sound field/quality setting during ADVANCED DISC REVIEW, the 
function continues without the on-screen display. Press [ADVANCED DISC REVIEW] again to 
cancel the function.12
Subtitle position is wrong.≥Adjust the position. (“Subtitle Position” in Display Menu)19
No subtitles.≥Display the subtitles.13
The subtitles overlap closed 
captions recorded on discs.≥Clear the subtitles.13
Cannot add markers.≥You cannot add markers with DVD-RAM.
≥If the disc’s elapsed play time doesn’t appear on the unit’s display, you cannot add markers.—
—
Point B is automatically set.≥The end of an item becomes point B when it is reached.—
A-B repeat is automatically 
canceled.≥A-B repeat is canceled when you press [QUICK REPLAY].—
Sound distorted.≥Noise may occur when playing WMA.—
Effects do not work.≥Some audio effects do not work or have less effect with some discs.
≥Dolby Pro LogicII does not work if you have changed the play speed.—
—
Humming is heard during play.≥An AC power supply cord or fluorescent light is near the cables. Keep other appliances and 
cords away from this unit’s cables.—
No sound≥There may be a pause in sound when you change the play speed.—
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RQT7969
Troubleshooting guide
Menus Page
Picture abnormal or unviewable
Progressive video
Listening to the radio
Television operation
Unit displays
Television displays
The Setup menu cannot be 
accessed.≥Select “DVD/CD” as the source.
≥Cancel program and random play.—
14
Picture distorted.≥Ensure that the unit is connected directly to the television, and is not connected through a video 
cassette recorder.6
Picture size doesn’t fit the 
screen.≥Change “TV Aspect” in the “Video” tab.
≥Change the Zoom setting.20
13
Menu is not displayed correctly.≥Restore the zoom ratio to “a1.00”.
≥Set “Subtitle Position” in Display Menu to “0”.13
19
Auto zoom function does not 
work well.≥Turn off TV’s zoom function.
≥Use the other preset aspect ratios or manual adjustment.
≥Zoom function may not work well, especially in dark scenes and may not work depending on the 
type of disc.—
13
—
The picture on the television 
disappears or stripes appear on 
the screen.≥Mobile telephone chargers can cause some disturbance.
≥If you are using a TV indoor antenna, change to an outdoor antenna. 
≥The television antenna wire is too close to the unit. Separate the antenna wire of the television 
from the unit.—
—
—
There is ghosting when 
progressive output is on.
≥This problem is caused by the editing method or material used on DVD-Video, but should be 
corrected if you use interlace output. Change “Video Output Mode” in Picture Menu to “480i”.19
Pictures not in progressive 
output.≥Press [PROGRESSIVE] on the main unit so “PRG” is displayed. Or select “480p” in “Video 
Output Mode” in Picture Menu.
≥If the unit is connected to the television through VIDEO OUT or S-VIDEO OUT terminal, output 
will be interlace, even if “PRG” is displayed.10, 
19
6
Closed captions not displayed.≥When progressive output is on, closed captions will not be displayed.—
Noise is heard.
“ST” flickers or doesn’t light.
Sound is distorted.≥Adjust the position of the FM or AM antenna.
≥Use an outdoor antenna.—
7
A beat sound is heard.≥Turn the television off or move it away from the unit.—
A low hum is heard during AM 
broadcasts.≥Separate the antenna from other cables.—
Cannot operate the TV.≥Press [TV] first to operate the television.
≥Check the remote control code for the TV manufacturer.—
25
The display is dark.≥Select “Bright” in “FL Dimmer” in the “Others” tab.21
“NO PLAY”≥You inserted a disc the unit cannot play; insert one it can.
≥You inserted a blank disc.9
—
“NO DISC”≥You haven’t inserted a disc; insert one.
≥You haven’t inserted the disc correctly; insert it correctly.—
9
“F61”≥Check and correct the speaker cord connections.
If this does not fix the problem, there is a power supply problem. Consult the dealer.4, 6
“DVD U11”≥Disc is dirty. Wipe it clean.9
“ERROR”≥Incorrect operation performed. Read the instructions and try again.—
“DVD H∑∑”
∑∑ stands for a number.≥Trouble may have occurred. The number following “H” depends on the status of the unit. Turn the 
unit off and then back to ON. Alternatively, turn the unit off, disconnect the AC power supply 
cord, and then reconnect it.
≥If the service numbers fail to clear, note the service number and contact a qualified service person.
—
—
“/”≥The operation is prohibited by the unit or disc.—
“Cannot display group xx, 
content xx”≥You are trying to display incompatible contents.—
“This disc may not be played in 
your region”≥You can only play DVD-Video if their region number is the same or includes the same region 
number as the unit or if the DVD-Video is marked “ALL”. Confirm the region number for the unit 
on the rear panel.Cover 
page
No on-screen display.≥Select “On” in “On-Screen Messages” in the “Display” tab.21
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RQT7969
Product Service/Maintenance/Glossary
Product Service
1. Damage requiring service— The unit should be serviced by 
qualified service personnel if:
(a) The AC power supply cord or AC adaptor has been damaged; 
or
(b) Objects or liquids have gotten into the unit; or
(c) The unit has been exposed to rain; or
(d) The unit does not operate normally or exhibits a marked 
change in performance; or
(e) The unit has been dropped or the cabinet damaged.
2. Servicing —Do not attempt to service the unit beyond that 
described in these operating instructions. Refer all other 
servicing to authorized servicing personnel.
3. Replacement parts— When parts need replacing ensure the 
servicer uses parts specified by the manufacturer or parts that 
have the same characteristics as the original parts. Unauthorized 
substitutes may result in fire, electric shock, or other hazards.
4. Safety check— After repairs or service, ask the servicer to perform 
safety checks to confirm that the unit is in proper working condition.
The servicer will require all components to service your system.
Therefore, should service ever be necessary, be sure to bring the 
entire system.
For product information or assistance with product operation:
In the U.S.A., refer to “Customer Services Directory” on page 31.In Canada, contact the Panasonic Canada Inc. Customer Care 
Centre at 1-800-561-5505, or visit the website 
(www.panasonic.ca), or an authorized Servicentre closest to you.
User memo:
Clean this unit with a soft, dry cloth.
≥Never use alcohol, paint thinner or benzine to clean this unit.
≥Before using chemically treated cloth, carefully read the 
instructions that came with the cloth.
Do not use commercially available lens cleaners as they may 
cause malfunction. (Cleaning the lens is generally not necessary 
although this depends on the operating environment.)
Product information
The model number and serial number of this product can be 
found on either the back or the bottom of the unit.
Please note them in the space provided below and keep for 
future reference.
MODEL NUMBER  SC-HT680
SERIAL NUMBER 
DATE OF PURCHASE  ______________________________
DEALER NAME  ___________________________________
DEALER ADDRESS  ________________________________
_________________________________________________
TELEPHONE NUMBER  _____________________________
Maintenance
Before moving the unit, ensure the disc trays are empty. Failure to do so will risk severely damaging the discs and the unit.
Glossary
Decoder
A decoder restores the coded audio signals on DVD’s to normal. 
This is called decoding.
Dolby Digital
This is a method of coding digital signals developed by Dolby 
Laboratories. Apart from stereo (2-channel) audio, these signals can 
also be multi-channel audio. A large amount of audio information can 
be recorded on one disc using this method.
DTS (Digital Theater Systems)
This surround system is used in many movie theaters around the 
world. There is good separation between the channels, so realistic 
sound effects are possible.
Dynamic range
Dynamic range is the difference between the lowest level of sound 
that can be heard above the noise of the equipment and the highest 
level of sound before distortion occurs.
Frame still and field still
Frames are the still pictures that go together to make a moving 
picture. There are about 30 frames shown each second.
One frame is made up of two fields. A regular television shows these 
fields one after the other to create frames.
A still is shown when you pause a moving picture. A frame still is 
made up of two alternating fields, so the picture may appear blurred, 
but overall quality is high.
A field still is not blurred, but it has only half the information of a 
frame still so picture quality is lower.
I/P/B
MPEG 2, the video compression standard adopted for use with 
DVD-Video, codes frames using these 3 picture types.
I:Intra coded picture
This picture has the best quality and is the best to use when 
adjusting the picture.
P:Predictive coded picture
This picture is calculated based on past I or P-pictures.
B:Bidirectionally-predictive coded picture
This picture is calculated by comparing past and future I and 
P-pictures so it has the lowest volume of information.
Linear PCM (pulse code modulation)
These are uncompressed digital signals, similar to those found on CD’s. 
Playback control (PBC)
If a Video CD has playback control, you can select scenes and 
information with menus.
Abkhazian: 6566
Afar: 6565
Afrikaans: 6570
Albanian: 8381
Ameharic: 6577
Arabic: 6582
Armenian: 7289
Assamese: 6583
Aymara: 6588
Azerbaijani: 6590
Bashkir: 6665
Basque: 6985
Bengali; Bangla: 6678
Bhutani: 6890
Bihari: 6672
Breton: 6682
Bulgarian: 6671
Burmese: 7789
Byelorussian: 6669
Cambodian: 7577
Catalan: 6765Chinese: 9072
Corsican: 6779
Croatian: 7282
Czech: 6783
Danish: 6865
Dutch: 7876
English: 6978
Esperanto: 6979
Estonian: 6984
Faroese: 7079
Fiji: 7074
Finnish: 7073
French: 7082
Frisian: 7089
Galician: 7176
Georgian: 7565
German: 6869
Greek: 6976
Greenlandic: 7576
Guarani: 7178
Gujarati: 7185Hausa: 7265
Hebrew: 7387
Hindi: 7273
Hungarian: 7285
Icelandic: 7383
Indonesian: 7378
Interlingua: 7365
Irish: 7165
Italian: 7384
Japanese: 7465
Javanese: 7487
Kannada: 7578
Kashmiri: 7583
Kazakh: 7575
Kirghiz: 7589
Korean: 7579
Kurdish: 7585
Laotian: 7679
Latin: 7665
Latvian, Lettish: 7686
Lingala: 7678Lithuanian: 7684
Macedonian: 7775
Malagasy: 7771
Malay: 7783
Malayalam: 7776
Maltese: 7784
Maori: 7773
Marathi: 7782
Moldavian: 7779
Mongolian: 7778
Nauru: 7865
Nepali: 7869
Norwegian: 7879
Oriya: 7982
Pashto, Pushto: 8083
Persian: 7065
Polish: 8076
Por tuguese: 8084
Punjabi: 8065
Quechua: 8185
Rhaeto-Romance:8277Romanian: 8279
Russian: 8285
Samoan: 8377
Sanskrit: 8365
Scots Gaelic: 7168
Serbian: 8382
Serbo-Croatian: 8372
Shona: 8378
Sindhi: 8368
Singhalese: 8373
Slovak: 8375
Slovenian: 8376
Somali: 8379
Spanish: 6983
Sundanese: 8385
Swahili: 8387
Swedish: 8386
Tagalog: 8476
Tajik: 8471
Tamil: 8465
Tatar: 8484Te l u g u : 8 4 6 9
Thai: 8472
Tibetan: 6679
Tigrinya: 8473
Tonga: 8479
Turkish: 8482
Turkmen: 8475
Twi: 8487
Ukrainian: 8575
Urdu: 8582
Uzbek: 8590
Vietnamese: 8673
Volapük: 8679
Welsh: 6789
Wolof: 8779
Xhosa: 8872
Yiddish: 7473
Yoruba: 8979
Zulu: 9085
Language code list
HT680.book  Page 30  Tuesday, December 14, 2004  8:55 AM