Harman Kardon DVD 50 (serv.man2) Service Manual ▷ View online
20
• Cabinet and Main Frame Section
S
AL
LOCA. NO. PART NO.(LG)
DESCRIPTION
SPECIFICATION
REMARKS
ASSEMBLY SECTION
A43
3501R-3076B
BOARD ASSY
ADVM3941NFM 1UH1 FRONT
A43-1
6871R-3079A
PWB(PCB) ASSY,TOTAL
ADVM3941NFM HK KEY
A43-2
6871R-3083A
PWB(PCB) ASSY,TOTAL
ADVM3941NFM HK H/P
A46
6871R-3077A
PWB(PCB) ASSY,TOTAL
DVM3941NFM MAIN
A47
6871R-3078A
PWB(PCB) ASSY,TOTAL
ADVM3941NFM HK JACK NTSC MIDDL
A48
3501R-3073A
BOARD ASSY
ADVM3951NFM
PARTS SECTION
250 3110R-0222A
CASE
TOP(DVD-5,H/K)
275 4811R-0027D
BRACKET ASSY
MAIN(DVM3800 . W/O GND . PVC C
277 4940R-V014A
KNOB
VOLUME HARMANKARDON
280 3721R-F176A
PANEL ASSY,FRONT[NORMAL PARTS]
DVD 50 EVNT
283 3580R-T013A
DOOR
TRAY HARMANKARDON
285 3301R-M008A
PLATE ASSY
SHIELD(DVD 50)
300 6410RAHS02A
POWER CORD
AP-10W NI SP2 CORE 80 STP SANG
SCREW
452 353-051A
SCREW
SPECIAL
452 353-051E
SCREW
SPECIAL (3X12)
462 353-085E
SCREW,DRAWING
+ 3 D4.0 L10.0 MSWR3/FZMCW-2
463 353-051B
SCREW
SPECIAL
465 353-046K
SCREW
SPECIAL (3X10 B.K)
467 353-046N
SCREW,
SPECIAL(3X8 BK.)
21 TROUBLESHOOTING GUIDE
Troubleshooting Guide
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSE
SOLUTION
Unit does not turn on
• Main Power Switch turned Off
• Press in Main Power Switch
• No AC power
• Check AC power plug and make certain any switched
outlet is turned on
Disc does not play
• Disc loaded improperly
• Load disc label-side up
• Incorrect disc type
• Check to see that disc is CD, CD-RW or DVD-Movie;
• Invalid Region Code
other types will not play
• Rating is above parental preset
• Use Region 1 disc only
• Enter password to override or change rating settings
• Enter password to override or change rating settings
No picture
• Intermittent connections
• Check all video connections
• Wrong input
• Check input selection of TV or receiver
No sound
• Intermittent connections
• Check all audio connections
• Incorrect digital audio selection
• Check digital audio settings
• DVD disc is in Fast or Slow mode
• There is no audio playback on DVD discs during
Fast or Slow mode
Picture is distorted or jumps during
• MPEG-2 decoding
• It is a normal artifact of DVD playback for pictures
Fast Forward or Reverse Play
to jump or show some distortion during Rapid Play
Some remote buttons do not operate
• Function not available for this disc
• Some discs do not include all DVD features
during DVD play
The menu is in a foreign language
• Incorrect menu language
• Change menu language selection
“
” Symbol appears
• Requested function not available at
• Certain functions may be disabled during passages
this time
of a disc
Picture is displayed in the wrong Aspect Ratio
• Incorrect match of Aspect Ratio settings • Change Aspect Ratio settings
to disc
Remote control inoperative
• Weak batteries
• Change both batteries
• Sensor is blocked
• Clear path to sensor or use remote sensor
Disc will not copy to VCR
• Macrovision protection
• Most DVDs are encoded with Macrovision
to prevent copying to VCR
22
ELECTRICAL TROUBLESHOOTING GUIDE
No 5V_D
or 5V_A .
No 5.2VA.
Is 5.2VA section working?
(Is the POWER CTL at
Pin6 High/low?)
Is oscillation present at the
Base of Q108?
Base of Q108?
Replace Q108.
Check L103, C123, C124,
R124.
Replace R102.
Replace BD101.
(Bridge rectifier)
Is R102(100K/2W) normal?
Is about AC 100V app;ied to
IC101 Pin 5.
Check IC101.
Is 5.2V applied to IC102
Pin 1?
Pin 1?
Is there a DC voltage at the
(+) terminal of BD101?
Check R127, 128.
(SHUTDOWN CKT)
1. Power(SMPS) Circuit
No FLD
Is 5.2VA section working?
Replace SMPS trans(T101).
Replace the inferior
components.
components.
Are F102, D107, D108 and
ZD101 open?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
A.
B.
NO
NO
23
Replace Main B/D
Refer to Front Part
Replace IC502
Reconnect it.
2. µ-COM Circuit
A. No Power
Does Logo appear
on the screen?
Is oscillation of
X501 normal?
Are IC501 Pins 193, 80
8
and 81 normal?
Do “DV 50” Bars appear?
Do “Hello” appear at FLD?
Is P3901
connected normally?
Is P3901 Pin 8, 9, 18 normal?
The waveform
on 3, 5, 7 pin of IC502
normal?
Check the oscillation
Check short.
OK
Replace IC501
or IC306.
Check power.
(Refer to power)
If power is
normal
normal
OK
POWER ON
1
1
YES
YES
YES
YES
NO
YES
YES
YES
A
NO
NO
NO
NO
NO
NO
NO
NO
YES
A
Click on the first or last page to see other DVD 50 (serv.man2) service manuals if exist.