Panasonic AG-TL750E / AG-TL750B Service Manual ▷ View online
1-3
1.2
DIAGNOSTICS OF MAJOR PC BOARDS
1.2.1
Diagnosing the MAIN and DECK TERMINAL Boards
(1) Remove the top cover and bottom cover as described in
sections 1.1.3 and 1.1.5.
(2) As described in section 1.1.7, disassemble the unit as shown
in Figs. 1-1-7 (b) and (c) before proceeding to the diagnos-
tics of these PC boards.
tics of these PC boards.
1.2.2
Diagnosing the FRONT 1 and FRONT 2 Boards
(1) Remove the top cover and front panel assembly as described
in sections 1.1.3 and 1.1.4.
(2) Remove the FRONT 1 and FRONT 2 boards by pushing the 2
hooks
Ó
and 1 hook
Ô
gently in the direction of arrows g,
then remove the FRONT 1 and FRONT 2 boards and diag-
nose them.
nose them.
(4) Unplug the connectors
Ç
,
Î
,
´
and
Ï
.
Fig. 1-1-7(c)
(5) Unplug the connector
˝
.
(6) Remove the 2 screws
S8
and 2 screws
S9
, then remove
the mechanism assembly in the upward direction.
Fig. 1-1-7(d)
Fig. 1-2-3(a)
(1) Remove the top cover as described in section 1.1.3.
(2) Remove the 2 screws
(2) Remove the 2 screws
S10
.
CAUTION
The supply voltage is input directly into the SW REG.
board ass’y. Be careful not to get an electric shock while
diagnosing and servicing.
The supply voltage is input directly into the SW REG.
board ass’y. Be careful not to get an electric shock while
diagnosing and servicing.
1.2.3
Diagnosing the SW REG. Board
Fig. 1-2-2
Ç
Î
Ï
´
DECK TERMINAL board
MAIN board
˝
S8
S9
Ô
Ó
FRONT 1 board
FRONT 2 board
S10
1-4
Ò
Â
S14
Fig. 1-2-3(b)
(3) Remove the 3 screws
S11
, remove the SW REG. board in
an upward direction and diagnose it.
S11
SW REG. board
1.2.4
Diagnosing the P/R Board
(1) Remove the top cover as described in section 1.1.3.
(2) Remove the 4 screws
(2) Remove the 4 screws
S12
and 2 screws
S13
.
CAUTION
• Read the notes on the lithium backup battery in sec-
• Read the notes on the lithium backup battery in sec-
tion 1.4.
Fig. 1-2-5
1.2.5
Replacing the Lithium Battery
(1) Tilt the MAIN board as described in section 1.1.7 (1), (2) and
(3).
(2) Remove the lithium battery by pushing it lightly in the direc-
tion of the arrow e.
Fig. 1-2-4(b)
(3) Remove the wire from the clamp
, remove the screw
S14
,
then remove the shielded case (P/R)
Ò
in an upward direc-
tion.
(4) Remove the shielded case (REG)
Â
in an upward direction
and diagnose the P/R board.
Fig. 1-2-4(a)
S13
S12
Lithium battery
1-5
1.3
SERVICE MENU
1.3.1
Menu Configuration and Operation Procedure
The SERVICE MENU mode is used during servicing. It is configured as shown below.
Power ON
Press the [STOP], [PAUSE] and
[MENU] buttons simultaneously.
[MENU] buttons simultaneously.
FUNCTION
HOUR METER
EMERGENCY
HISTORY
HISTORY
MECHA
CHECK MODE
CHECK MODE
OPERATION
CHECK MODE
CHECK MODE
SERVO
ADJUST MODE
ADJUST MODE
Caution: There should be no cassette loaded in the unit.
Press the [menu] button to return to
the EMERGENCY HISTORY screen.
the EMERGENCY HISTORY screen.
Used to check the history of warnings and
emergencies related to the mechanism.
From this screen, press the [SET –] or [SET+]
button to view the mechanism mode and sensor
status information at the moment a warning
condition occurred.
emergencies related to the mechanism.
From this screen, press the [SET –] or [SET+]
button to view the mechanism mode and sensor
status information at the moment a warning
condition occurred.
See sections 1.3.4 and 1.3.5.
This is the initial screen of the SERVICE MENU.
Select a menu item with the [SHIFT
Select a menu item with the [SHIFT
䊲
] and [SHIFT
䊳
] buttons and go to a mode in the lower band by pressing
the [SET -] or [SET +] button.
Pressing the [MENU] button cancels the SERVICE MENU mode.
Pressing the [MENU] button cancels the SERVICE MENU mode.
The on-screen display is not provided when EVR ADJUST is selected. The information is displayed in the
front panel FDP.
front panel FDP.
Used to check the ROM version from the initial screen.
Used to disable the warning detection and initialize the menu switch
settings to the factory setting.
See section 1.3.2.
settings to the factory setting.
See section 1.3.2.
Used to check the hour meters.
See section 1.3.3.
See section 1.3.3.
Used for servo adjustments.
See section 3.2.
See section 3.2.
Used to diagnose the mechanism operating sensors without using a
measuring tool.
See section 1.3.5
measuring tool.
See section 1.3.5
Used to check the operation switch modes.
Pressing one of the buttons displayed in this screen changes the displayed
name of the pressed button to ">".
Pressing one of the buttons displayed in this screen changes the displayed
name of the pressed button to ">".
FUNCTION
HOUR METER
EMERGENCY HISTORY
MECHA CHECK MODE
OPERATION CHECK MODE
SERVO ADJUST
EVR ADJUST
ROM VER.
HOUR METER
EMERGENCY HISTORY
MECHA CHECK MODE
OPERATION CHECK MODE
SERVO ADJUST
EVR ADJUST
ROM VER.
[SERVICE MENU]
1. WARNING ENABLE
2. MENU INITIALIZE
[FUNCTION]
ON
OFF
1. DRUM ON
2. OPERATE ON
3. CAPSTAN ON
4. TOTAL DRUM ON
5. LOADING COUNT
6. EJECT COUNT
7. BATTERY
2. OPERATE ON
3. CAPSTAN ON
4. TOTAL DRUM ON
5. LOADING COUNT
6. EJECT COUNT
7. BATTERY
[HOUR METER]
000000H
000000H
000000H
000000H
000000
000000
000000
000000H
000000H
000000H
000000
000000
000000
1. E–04:DRUM ERROR
2. E–06:CAPSTAN ERROR
3. E–05:TU REEL ERROR
4. E–––:
[EMERGENCY HISTORY]
99–02–02 02:11
99–01–02 02:11
98–12–21 02:11
(MODE) EJECT
(ENCD) HHLL
(SAFE) ON
(BGIN) ON
(ENCD) HHLL
(SAFE) ON
(BGIN) ON
(CAPN) OFF
(SPFG) L
(SP. D) 070
(REMN) 000
(SPFG) L
(SP. D) 070
(REMN) 000
[MECHA CHECK MODE]
→ NOCAS
(REF.) HHLL
(CASS) OFF
(END) ON
(REF.) HHLL
(CASS) OFF
(END) ON
(F/R) FWD
(TUFG) H
(TU. D) 070
(TUFG) H
(TU. D) 070
(MODE) EJECT
(ENCD) HHLL
(SAFE) ON
(BGIN) ON
(ENCD) HHLL
(SAFE) ON
(BGIN) ON
(CAPN) OFF
(SPFG) L
(SP. D) 070
(REMN) 000
(SPFG) L
(SP. D) 070
(REMN) 000
[MECHA CHECK MODE]
→ NOCAS
(REF.) HHLL
(CASS) OFF
(END) ON
(REF.) HHLL
(CASS) OFF
(END) ON
(F/R) FWD
(TUFG) H
(TU. D) 070
(TUFG) H
(TU. D) 070
REC
REW
PLAY
TRACKING–
V. LOCK–
TIMER
LOCK
SHIFT
REW
PLAY
TRACKING–
V. LOCK–
TIMER
LOCK
SHIFT
↓
SET+
[OPERATION CHECK MODE]
STOP
REVERSE
REVERSE
SEARCH
CNTRST
SHIFT
CNTRST
SHIFT
→
EJECT
REC CHK
PAUSE
FF
TRACKING+
V. LOCK+
DISPLAY
RST/CAN
SET –
OPERATE
PAUSE
FF
TRACKING+
V. LOCK+
DISPLAY
RST/CAN
SET –
OPERATE
24H SLOW TRACKING
3HVLK (0F)
L12HVLK (00)
L24HVLK (02)
48H TL MOVE
48HSKW (1D)
L12HSKW (70)
L24HSKW (4C)
SW. POINT
L12HVLK (00)
L24HVLK (02)
48H TL MOVE
48HSKW (1D)
L12HSKW (70)
L24HSKW (4C)
SW. POINT
[SERVO ADJUST MODE]
(12)
(22)
(5A)
1-6
1.3.2
Function
1. WARNING ENABLE
[ON]
Enables warning detection.
OFF
Disables warning detection.
2. MENU INITIALIZE
Initializes the service menu switch setting to the factory setting.
Pressing the [STOP] and [RESET/CANCEL] buttons simultaneously when the
cursor is located on “MENU INITIALIZE” resets the menu switch setting to
the factory setting and changes the display from OFF to ON.
Pressing the [STOP] and [RESET/CANCEL] buttons simultaneously when the
cursor is located on “MENU INITIALIZE” resets the menu switch setting to
the factory setting and changes the display from OFF to ON.
Table 1-3-3
Item
Setting
Description
Item
Display
Description
1. DRUM ON
dh
Displays the drum rotation time.
2. OPERATE ON
Ph
Displays the operating time.
3. CAPSTAN ON
Ch
Displays the capstan rotation time.
4. TOTAL DRUM ON
td
Displays the total drum rotation time.
5. LOADING COUNT
Lc
Displays the number of loading operations.
6. EJECT COUNT
Ec
Displays the number of ejection operations.
7. BATTERY
bt
Allows writing of the current date data. Press the [RESET/CANCEL], [SET +] and
[SET -] buttons simultaneously while the cursor is located on “BATTERY” to write
the current date. This must be executed after the lithium battery replacement.
[SET -] buttons simultaneously while the cursor is located on “BATTERY” to write
the current date. This must be executed after the lithium battery replacement.
Table 1-3-4
1.3.3
Hour meter
This screen is used to check the hour meters.
1.3.4
Emergency history
This screen is used to check the history of warning emergencies related to the mechanism. The emergency history is written in the
EEPROM (IC607 on the MAIN board) and records the history of the latest 4 emergencies.
Press the [STOP], [PAUSE] and [CNT RESET] buttons simultaneously while the emergency history is displayed to reset the history.
EEPROM (IC607 on the MAIN board) and records the history of the latest 4 emergencies.
Press the [STOP], [PAUSE] and [CNT RESET] buttons simultaneously while the emergency history is displayed to reset the history.
1. DRUM ON
2. OPERATE ON
3. CAPSTAN ON
4. TOTAL DRUM ON
5. LOADING COUNT
6. EJECT COUNT
7. BATTERY
2. OPERATE ON
3. CAPSTAN ON
4. TOTAL DRUM ON
5. LOADING COUNT
6. EJECT COUNT
7. BATTERY
[HOUR METER]
000000H
000000H
000000H
000000H
000000
000000
000000
000000H
000000H
000000H
000000
000000
000000
1. E–07:EJECT ERROR
2. E–01:LOADING ERROR
3. E–––:
4. E–––:
[EMERGENCY HISTORY]
98–07–24 12:40
98–07–20 08:01
Latest emergency
Error code
Year, month, day, hour and
minute of occurrence
minute of occurrence
Warning details
Last but one emergency
Last but two emergency
Last but three emergency
[ ] indicates the factory setting.
Click on the first or last page to see other AG-TL750E / AG-TL750B service manuals if exist.