Panasonic AG-DV2500P User manual

ORDERNO. BSD0303M901
D21
DVVIDEO CASSETTERECORDER
AG-DV2500P/ AG-DV2500E
Please refer to theOperating Instructionsin theappendix
folder. / (Go to Appendix List)
1

2

SAFETYPRECAUTIONS
GENERALGUIDELINES
1. Whenservicing, observetheoriginal leaddress. Ifashort/ circuit
isfound, replace all parts whichhavebeenover-heatedor
damagedbytheshortcircuit.
2. Afterservicing, see toitthat all theprotectivedevices suchas
insulation barriers, insulation papersshieldsareproperlyinstalled.
3. Afterservicing, make thefollowing leakagecurrentchecks to
preventthecustomerfrombeing exposedtoshock hazards.
LEAKAGE CURRENTCOLDCHECK
1. Unplug theACcordand connect ajumperbetweenthetwoprongs
on theplug.
2. Measuretheresistance value, withanohmmeter, betweenthe
jumperedACplug and eachexposedmetalliccabinet parton the
equipmentsuchas screwheads, connectors, control shafts, etc.
Theresistance valuemust bemorethan5M .
3

Figure1
LEAKAGE CURRENTHOTCHECK (See Figure1)
1. Plug theACcorddirectlyintotheACoutlet. / Donotuse an
isolation transformerforthischeck.
2. Connect a1.5k , 10Wresistor, inparallel witha0.15 F
capacitor, betweeneachexposedmetallicparton theset ana
good earthground suchas awaterpipe, as showninFigure1.
3. Use anACvoltmeter, with1000 ohms/voltormoresensitivity, to
measurethepotential across theresistor.
4. Check eachexposedmetallicpart, and measurethevoltageat
eachpoint.
5. Reverses theACplug intheACoutlet repeat eachoftheabove
measurements.
6. Thepotential at anypointshouldnotexceed0.15 volts RMS. A
leakagecurrenttester(Simpson Model 229 equivalent) maybe
usedtomake thehotchecks, leakagecurrentmust notexceed0.1
milliamp. Incase ameasurementisoutsideofthelimits specified,
thereisapossibilityofashock hazard, and theequipmentshould
berepairedand checkedbeforeitisreturnedtothecustomer.
ABOUTLEADFREE SOLDER(PbF)
Distinction ofPbfPCB:
PCBs(manufactured)using leadfree solderwill have aPbF stampon thePCB.
Caution:
1. Pbfree solderhas ahighermelting pointthanstandardsolder;
4

Typicallythemelting pointis50-70°F(30-40°C)higher. Please use
ahigh temperaturesoldering iron. Incase ofthesoldering iron
withtemperaturecontrol, please set itto700±20°F(370±10°C).
2. Pbfree solderwill tend tosplashwhenheatedtoo high (about
1100°F/600°C).
ELECTROSTATICALLYSENSITIVE (ES)DEVICES
Somesemiconductor (solidstate)devices canbedamagedeasilybystaticelectricity. Such
componentscommonlyarecalledElectrostaticallysensitive (ED) Devices. Examples oftypical
ES devices areintegratedcircuitsand somefield-effecttransistorsand semiconductor “chip”
components. Thefollowing techniques shouldbeusedtohelpreduce theincidence of
componentdamagecausedbystaticelectricity.
1. Immediatelybeforehandling anysemiconductorcomponentor
semiconductor-equippedassembly, drainoff anyelectrostatic
chargeon yourbodybytouching aknownearthground. /
Alternatively, obtainand wearacommerciallyavailable
discharging wrist trapdevice, whichshouldberemovedfor
potential shock reasonspriortoapplying powertotheunitunder
test.
2. Afterremoving anelectrical assemblyequippedwithES devices,
place theassemblyon aconductivesurface suchas aluminum
foil, topreventelectrostaticchargebuildup orexposureofthe
assembly.
3. Use onlyagroundedtipsoldering iron tosolderorunsolderES
devices.
4. Use onlyananti-staticsolderremoval device classifiedas “anti-
static”cangenerate electrical charges sufficienttodamageES
devices.
5. Donotuse freon-propelledchemicals. These cangenerate
electrical charges sufficienttodamageES devices.
6. DonotremoveareplacementES device fromits protective
packageuntil immediatelybeforeyou arereadytoinstall it. / (most
replacementES devices arepackagewithleadselectrically
shortedtogetherbyconductivefoam, aluminumfoil orcomparable
5

conductivematerial).
7. Immediatelybeforeremoving theprotectivematerial fromthe
leadsofareplacementES device, touchtheprotectivematerial to
thechassisorcircuitassemblyintowhichthedevice will be
installed. / CAUTION:Besureno powerisappliedtothechassis
orcircuit, and observeall othersafetyprecautions.
8. Minimizebodilymotionswhenhandling unpackedreplacementES
devices. (Otherwise harmless motion suchas thebrushing
togetherofyourclothes fabricorthelifting ofyourfootfroma
carpetedfloorcangenerate staticelectricitysufficienttodamage
anES device).
X-RADIATION
WARNING
1. Thepotential source ofX-radiation inEVFsets istheHigh Voltage
section and thepicturetube.
2. Whenusing apicturetubetest jigforservice, ensurethat jigis
capableofhandling 10kVwithoutcausing x-radiation.
Note:
Itisimportanttouse anaccurateperiodicallycalibratedhigh voltagemeter.
3. MeasuretheHigh Voltage. Themeter(electrictype) reading should
indicate 2.5kV, 0.15kV. Ifthemeterindication isoutoftolerance,
immediate service and correction isrequiredtopreventthe
possibilityofprematurecomponentfailure. To preventanx-
radiation possibility, itisessential touse thespecifiedpicturetube.
6

7

1. Service Information
2. Mechanical Adjustments
3. Electrical Adjustments
8

4. Technical Description
5. Block Diagrams/SchematicDiagrams/Circuit Board
Diagrams
NOTE
BE SURE TOMAKE YOUR ORDERS OFREPLACEMENTPARTS ACCORDINGTOPARTS LIST.
CAUTION
THE MARK INDICATES THE PRIMARYCIRCUITTODISTINGUISHTHE PRIMARYFROMTHE
SECONDARYCIRCUIT. / PAYATTENTIONNOTTORECEIVE ANELECTRICSHOCK DURING
REPAIR
SERVICE OFTHE PRODUCTS.
IMPORTANTSAFETYNOTICE:
COMPONENTS IDENTIFIEDWITHTHE MARK HAVE THE SPECIALCHARACTERISTICS FOR
SAFETY. / WHENREPLACINGANYOFTHESE COMPONENTS, USE ONLYTHE SAME TYPE.
5.1. INDEX TO PAGES OFMAINBOARDSAND CIRCUITBOARD
LOCTION
5.1.1. Circuitboard location
5.2. SYSTEMCONTROLBLOCK DIAGRAM
5.3. VIDEO BLOCK DIAGRAM
5.4. AUDIO BLOCK DIAGRAM
5.5. OVERALL WIRING DIAGRAM
5.6. DVUNITOVERALL WIRING DIAGRAM
5.7. MAINSCHEMATICDIAGRAM
5.8. MAINCIRCUITBOARD
5.9. DV/CPUSCHEMATICDIAGRAM
5.10. DV/CPUCIRCUITBOARD
5.11. MDA/DC CIRCUITBOARD
9

5.12. MDA/DC SCHEMATICDIAGRAM
5.13. FDM(FRONT, DVCONN &MIC)SCHEMATICDIAGRAMS
5.14. FDM(FRONT, DVCONN &MIC)CIRCUITBOARDS
5.15. MECHA&MECHACONN SCHEMATICDIAGRAMS
5.16. MECHA&MECHACONN CIRCUITBOARDS
5.17. ICBLOCK DIAGRAMS
6. Mechanical Replacement PartsList &Exploded
Views
NOTE:
1. Besuretomake your ordersofreplacementpartsaccording tothislist.
2. Unless otherwise specified, all resistorsareinOHMS, K=1,000 OHMS, all capacitorsarein
MICROFARADS
( F), P= F.
3. TheP.C. Board unitmarkedwith" " shownbelowthemainassembledparts.
4. Thepartsmarkedwith on theexplodedviewshowtheelectricparts.
5. IMPORTANTSAFETYNOTICE
Componentsidentifiedwiththemarkhave thespecial characteristics for safety. When
replacing
anyofthese components, use onlythesametype.
6. Themarking (RTL)indicates theretention timeislimitedfor thisitem. / Afterthe
discontinuation
assemblyinproduction, itwill no longerbeavailable.
7. “(M)”inRemarkcolumnindicates neededintheperiodical maintenance.
7. Electrical Replacement PartsList
10

NOTE:
1. Besuretomake your ordersofreplacementpartsaccording tothislist.
2. Unless otherwise specified, all resistorsareinOHMS, K=1,000 OHMS, all capacitorsarein
MICROFARADS
( F), P= F.
3. TheP.C. Board unitmarkedwith" " shownbelowthemainassembledparts.
4. Thepartsmarkedwith on theexplodedviewshowtheelectricparts.
5. IMPORTANTSAFETYNOTICE
Componentsidentifiedwiththemarkhave thespecial characteristics for safety. When
replacing
anyofthese components, use onlythesametype.
6. Themarking (RTL)indicates theretention timeislimitedfor thisitem. / Afterthe
discontinuation
assemblyinproduction, itwill no longerbeavailable.
7. “(M)”inRemarkcolumnindicates neededintheperiodical maintenance.
NOTE:
Alist ofparts isstoredindata form intheCD-ROM. Itislocated
withinthefolderAPPENDIX/PARTS. Please use as necessary.
8. PDFforPrinting
ThePDFdocumentsfor printing consistofseveral files persection.Openeverysection (file)
through alink(blueframe)on thecover.
Setting ofAcrobatReader
Toviewalinkinanewwindow, followtheprocedurebelow. Whenyou operatethePDF
documents
printing, you canopenaPDFfileofeachsection whiledisplaying thecoverpage. Thisis
convenient
thePDFfiles inseveral sections.
<Howtoset>Inthe[File]menu, select[Preference]-[General...]and disable[OpenCross-Doc
Links
Window].
11

1-1
SECTION 1
SERVICE INFORMATION
1.1 CONSTRUCTION OF THE MAIN BOARD
MECHA BOARD
ASSEMBLY
MAIN BOARD
ASSEMBLY
DV CONN BOARD
ASSEMBLY
d
FRONT BOARD
ASSEMBLY
MIC BOARD
ASSEMBLY
a
fb
c
d
f
CN4001
DV/CPU BOARD
ASSEMBLY
MDA/DC BOARD
ASSEMBLY
e
e
MECHA CONN BOARD
ASSEMBLY
1 4 1 1
1 2
1 3
0 3
0 1
0 2
0 4
0 1
0 2
0 3
0 4
1 1
1 2
1 3
1 4
MAIN BOARD ASSEMBLY
FRONT BOARD ASSEMBLY
DV CONN BOARD ASSEMBLY
MIC BOARD ASSEMBLY
DV/CPU BOARD ASSEMBLY
MDA/DC BOARD ASSEMBLY
MECHA BOARD ASSEMBLY
MECHA CONN BOARD ASSEMBLY

1-2
BOTTOM COVER
1.2 HOW TO REMOVE THE OUTER COVER
1.2.1 Top cover
(1) Remove the four screws .
(2) Remove the top cover while lifting the rear part of it.
Fig. 1.2.1
1.2.2 Bottom cover
(1) Remove the four screws .
(2) Remove the bottom cover while lifting the rear part of it.
Fig. 1.2.2
1.2.3 Front panel
(1) Remove the top and bottom covers
(2) Remove the front panel while releasing the four hooks .
Fig. 1.3.1
Fig.1.2.3
1.3 HOW TO REPLACE THE FUSE
(1) Unplug the DC power cable before replace the fuse.
(2) Remove the top cover.
(3) Find the fuse F1 on the MDA/DC board.
CAUTION
• Beforereplacingthefuse,investigateandidentifythecause
of the blow out to prevent further damage.
• The fuse is an important item for safety. Please be sure to
replace it with a fuse that has the specified parts numbers.
TOP COVER
Hook
Hook
FRONT PANEL
F1
1
1
1
2
2
2
1

1-3
DV/CPU board
assembly
MDA/DC board
assembly
1.4 HOW TO EXAMINE THE BOARDS
1.4.1 MAIN board assembly
(1) Removethe bottom cover to examinethe B-side of the main
board.
Fig. 1.4.1 (1)
(2) Remove the four screws to examine the A-side.
(3) Remove the two screws on the rear cover.
(4) Pull down the main board as shown in fig. 1.4.1 (3).
Fig. 1.4.1 (2)
Fig. 1.4.1 (3)
1.4.2 MDA/DC board assembly
(1) Remove the top cover to examine the A-side.
(2) To examine the B-side, pull down the main board as shown
in Fig. 1.4.2 (2).
Fig. 1.4.2 (1)
Fig. 1.4.2 (2)
Main board
assembly
REAR COVER
MAIN board
assembly
Keep a distance to a minimum from the unit,
because this FFC cable may be damaged.
MDA/DC board
assembly
1.4.3 DV/CPU board assembly
(1) Remove the top cover as shown in Fig. 1.4.2 (1) to examine
the DV/CPU board.
3
3
3
4
4

1-4
1.4.4 FRONT board assembly
(1) Remove the front panel to examine the front board.
(2) Remove the screw 5, and pull the board down to examine
the B-side.
Fig. 1.4.4
1.5 HOW TO REMOVE THE MECHANISM UNIT
(1) Remove the six screws .
(2) Remove the front panel.
(3) Remove the CN111 connector on the MDA/DC board.
(4) Remove the wire that are attached to the DV CONN board.
Fig. 1.5.1
(5) Pull up the mechanism unit.
(6) RemoveCN4002 and CN4003(FFC cables connected tothe
main board).
Fig. 1.5.2
Fig. 1.5.3
FRONT board
assembly
DV CONN board
CN111
CN4003
Mechanism unit
CN4002
5
6
6
6

1-5
1.6 HOW TO REMOVE THE MECHANISM ASSEMBLY
To remove only the mechanism assembly from the mechanism
unit.
(1) Remove the shield case on the DV/ PU board and remove
the N107 FP wire from the drum assembly.
Fig. 1.6.1
(2) Remove the FF wires that connects the mechanism board,
which is mounted on the backs of the mechanism assem-
bly, MDA/D board, and the DV/ PU board.
(3) Remove the four screws 7 on the side.
(4) Remove the mechanism assembly as shown in Fig. 1.6.3.
Fig. 1.6.3 Mechanism assembly
For instructions on disassembling each part of the mecha-
nism assembly, please refer to the Section 2.
Fig. 1.6.2
CN107
7
7
To: CN119
MDA/DC board
To: CN117
MDA/DC board
To: CN114
MDA/DC board

1-6
Gear Ç
Fig. 1.7.4
1.7 HOW TO TAKE OUT THE CASSETTE TAPE IN CASE
OF EMERGENCY
An emergency system on this unit enables the cassette tape to
be taken out manually.
When a cassette tape is stuck, take it out as described below.
Procedure
1. Gear Å: Emergency gear for MODE MOTOR
2. Gear ı: Emergency gear for REEL MOTOR
3. Gear Ç: Emergency gear for HOUSING MOTOR
(1) In order to turn the mode motor, turn the gear Å (red color)
in the direction of the arrow. While turning the gear also
push it in to drive loading / unloading.
Fig. 1.7.1
(2) To wind the tape, when the tape is loosened a little, put a
screw driver in the emergency gear ı, which drives the
reel. (The drive direction does not matter.)
Fig. 1.7.2
Gear Å
Gear ı
Fig. 1.7.3
(3) Repeat steps (1) and (2) alternately and little by little until the
tape is wound completely into the cassette.
(4) onfirm that the tape is completely wound. Then, turn the
gear Ç (red color) in the direction of the arrow to eject the
cassette housing. Take the cassette out when it comes out
of the loading slot.

1-7
1.8 SERVICE MENU
1.8.1 How to display the Service Menu
1.8.2 How to operate the Menu
In no cassette condition, by pressing the MENU button for 2 seconds or longer while keeping either the REC or PLAY button
pressed, the first tier of the Service Menu will be displayed on the video monitor . As shown in Table 1.8.1, the Service Menu
contentthat is displayedwill dif fer depending onwhich buttons youpress together simultaneously.
1Press the or button on the front panel to move the cursor to the mode you want to change.
Press the [SET] (or button) to select the item.
Press the or button to change the parameter.
When finished making the change, press the [SET] button. The parameter stops blinking when the change has been confirmed.
(Returning using the button or [MENU] button causes the setting to revert to the status prior to the change.)
When all settings are completed, move the cursor to “P AGE BACK” and press the [SET] button to return to the MENU screen.
* If the button is pressed when the parameter is not blinking, it returns to the main screen.
* If the [MENU] button is pressed, it returns to the normal screen.
Table 1.8.1 Service Menu First Tier List
Fig. 1.8.1 (1) Front Panel
Fig. 1.8.2 (1) Menu Screen
(with REC pressed simultaneously) Fig. 1.8.2 (2) Menu Screen (with PLAY pressed simultaneously)
MENU button
STOP [ ] button
REW [ ] button
PLAY [ ] button
FF [ ] button
VTR1 MENU
VTR2 MENU
DIP SW
HOUR METER
ERROR HISTORY
OTHERS
CPU VERSION
VCR 1 Menu
VCR 2 Menu
DIP SW Menu
Hour Meter
Warning History
MENU SAVE etc.
CPU Version
Item Displayed Content Activation Method
REC PLAY
VTR1 . . – – – ME NU – – –
EX I T
CPU VERS ION
SYS 0001
VTR 0102
VTR1 . . – – – ME NU – – –
VTR2 . .
DIP SW. .
HOUR METER . .
ERROR H I STORY . .
OTHERS . .
EX I T
SET
MENIU
EJECT
REC PLAY PAUSE
REW STOP FF
DVCAM NTSC PAL REC INH.
CH-1/3
CH-2/4
A.DUB
OPERATE
INPUT SEL.REMOTE SEL.
MIC
SERIAL
WIRELESS
9PIN
LINE
DV
Y/C
2
3
4
5

1-8
LONG PAUSE
REC MODE
LP WARNING
TEST SIGNAL
TEMP THRESHOLD
BATT. SHUT DOWN
BATT. ALARM
OFF
ON
SP
LP
OFF
ON
OFF
ON
220
10.5
11.0
Disables long pause function
Enables long pause function
SP recording
LP recording (Do not change since performance cannot be guaranteed)
LP INH not displayed (Enables playback with LP mode) (Do not change since
performance cannot be guaranteed)
LP INH displayed (Disables playback with LP mode)
Output color bars only.Do not output any otherTEST signals.
Use BARS button of a attached wireless controller reception to trigger output TEST
signal, rotating in this order:
Color bars Color bars (rotate per track) Grayscale Grayscale (rotate per
track) Multi burst (Y signal only) Multi burst (Y and C signals) 100% white
Red Black burst
Threshold of rising temperature warning display, 00~255 (220 [DCh] = internal
temperature approx. 60°C). Refer to item “TEMP” in table 1.8.7 (1)
Voltage value to carry out power OFF operation (Set at OFF, 10.0~12.0 in
increments of 0.1)
Voltage value to trigger display of battery alarm warning (Set at 10.0~12.0 in
increments of 0.1)
Item Parameter
1.8.3 VTR 1 menu
Table 1.8.3 VTR 1 Menu Setting Item List
is default setting when shipped from factory.
1.8.4 VTR 2 menu
Table 1.8.4 VTR 2 Menu Setting Item List
REC REPEAT
FOOT SW LEVEL
MIC REC CH
ID 422 (H)
ID 422 (L)
FF/REW SPEED
DV DF MASK (PAL only)
OFF
2
12
ON
LEVEL1
LEVEL2
NORMAL
CH1-MIX
CH2-MIX
F0
4E
x50
x75
x100
MAX
OFF
ON
No repeat recording
Repeat recording 2 times
Repeat recording 12 times
Full repeat recording
Possible from any mode
Possible only from STOP or REC PAUSE mode
Record input signal from connected MIC only on CH2 (CH4 : during A.DUB mode)
[No recording mode]. Do not record input signal from connected MIC on CH1/CH2
(No recording on CH3+4 during A.DUB)
Record input signal from connected MIC on CH1/CH2 (CH3/CH4 during A.DUB)
High Device ID (00~FF). First bit is fixed at PAL1, NTSC0
Low Device ID (00~FF)
Maximum FF/REW speed is regulated to x50
Maximum FF/REW speed is regulated to x75
Maximum FF/REW speed is regulated to x100
No maximum FF/REW speed regulation
“1” is recorded as per format
“0” is always recorded
Item Parameter
is default setting when shipped from factory.

1-9
1.8.5 DIP switch menu
Sets the DIP SW. (All status are set to “OFF” or “0” when shipped.)
Table 1.8.5 DIP SW Menu Setting Item List
is default setting when shipped from factory
Error Rate Monitor
By setting DIP SW-0 to “1”, the error rate value is displayed in
position [15] on the monitor screen.
TheerrorratevalueisalwaysViterbiON mode, with CH-1 shown
in the upper row, and CH-2 shown in the lower row and total
AUDIO/VIDEO.
When the error rate increases, a warning message "HEAD
CLEANING REQUIRED" is displayed. The detection threshold
for display is when the error rate value is over 4,500 (one-chan-
nel AV total) for 7 seconds consecutively. Fig.1.8.5 DIP SW-0 Display Screen
DIP SW 1/3
DIP SW – 0
DIP SW – 1
DIP SW – 2
DIP SW – 3
DIP SW – 4
DIP SW – 5
DIP SW – 6
DIP SW – 7
DIP SW 2/3
DIP SW – 8
DIP SW – 9
DIP SW – 10
DIP SW – 11
DIP SW – 12
DIP SW – 13
DIP SW – 14
DIP SW – 15
DIP SW 3/3
DIP SW – 16
DIP SW – 17
DIP SW – 18
DIP SW – 19
DIP SW – 20
DIP SW – 21
DIP SW – 22
DIP SW – 23
0
OFF
OFF
OFF
OFF
OFF
0
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1: Displays error rate monitor and CPU port information
ON: Disables warning detection
Change prohibited
ON: Disables DEW warning
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
ON: Displays error rate solely for audio block on the error rate monitor screen
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Change prohibited
Item Parameter Default setting at factory
1DC 2MODE
PORT
31TEMP 4
6
76 76 76 76 76 76 76 76 7
12 13 14 8
15
916 10
17 11 18 20 19
5 5
1DEW
Error Rate DisplayValue