Panasonic WJ-HD500 Service Manual ▷ View online
– 9 –
4. Adjustment Procedure
8
Refer to the Location of the Test Points and
Adjusting Controls on the page 11.
3
Power Board
(1). +5V Adjustment
Test Point:
TP16 (+5V)
Main Board
Adjust:
VR2 (+5V)
Power Board
8
Turn on the power.
8
Connect the Digital Voltmeter to TP16.
8
Adjust VR2 to obtain 5.05 ± 0.05 V.
3
Main Board
(2). Real Time Clock Frequency Adjustment
Test Point:
TP21 (REAL TIME CLK)
Main Board
Adjust:
CT21 (REAL TIME CLK)
Main Board
8
Connect the Frequency Counter to TP21.
8
Adjust CT21 to obtain 32768.5 ± 0.03 Hz.
Note: This Adjustment should be done within 2 minutes
after turning on the power.
(3). Frame Memory Controller Frequency Adjustment
Test Point:
TP801 (FRAME MEMORY CLK) Main Board
Adjust:
CT801 (FRAME MEMORY CLK) Main Board
8
Connect the Frequency Counter to TP801.
8
Adjust CT801 to obtain 27 MHz ± 100 Hz.
(4). Audio PLL Adjustment
Test Point:
TP802 (PLL)
Main Board
Adjust:
CT802 (PLL)
Main Board
8
Connect the Digital Voltmeter to TP802.
8
Adjust CT802 to obtain 1.65 ± 0.1 V.
(5). Multiscreen Output Level Adjustment
Test Point:
Multiscreen Output Connector Rear Panel
Adjust:
VR751 (MULTI OUT)
Main Board
8
Connect the terminated Oscilloscope with 75
Ω
to the
Multiscreen Output Connector.
8
Adjust VR751 so that the H-Sync Level becomes 300 ± 15
mV as shown in Fig. 4-1.
Fig 4-1
(6). Record Output Level Adjustment
Test Point:
Spot Output Connector
Rear Panel
Adjust:
VR701 (REC OUT)
Main Board
8
Supply the Colour Bar signal to the Video Input Connector
1.
8
Set the position of the SW11 on the Main Board to SUB
side.
8
Connect the terminated Oscilloscope with 75
Ω
to Spot
Output Connector.
8
Adjust VR701 so that the H-Sync Level becomes 300 ± 15
mV as shown in Fig. 4-1.
(7). Decoder Clamp Level Adjustment
Test Point:
TP601 (CLAMP-1)
Main Board
TP602 (CLAMP-2)
Main Board
TP603 (CLAMP-3)
Main Board
Adjust:
VR551 (CLAMP-1)
Main Board
VR601 (CLAMP-2)
Main Board
VR651 (CLAMP-3)
Main Board
8
Connect the Digital Voltmeter to TP601.
8
Adjust VR551 to obtain 0.60 ± 0.02 V.
8
Change the connection of the Digital Voltmeter to TP602.
8
Adjust VR601 to obtain 0.60 ± 0.02 V.
8
Change the connection of the Digital Voltmeter to TP603.
8
Adjust VR651 to obtain 0.60 ± 0.02 V.
3
Analog Board
(8). Decoder 1 and 2 Input Level Adjustment
Test Point:
Spot Output Connector
Rear Panel
Adjust:
VR611 (DECODER-1)
Analog Board
VR621 (DECODER-2)
Analog Board
8
Supply the Stairstep signal (5 Steps, Chroma off) to the
Video Input Connector 1.
8
Confirm the Position of SW11 on Main Board is SUB side.
8
Connect the terminated Oscilloscope with 75
Ω
to the Spot
Output Connector.
300
±
15 mV
– 10 –
8
Adjust VR611 and VR621 so that the 700 mV portion of the
Stairstep signals becomes 700 ± 15 mV as shown in Fig.
4-2.
Fig 4-2
(9). Decoder 3 Input Level Adjustment
Test Point:
Multiscreen Output Connector Rear Panel
Adjust:
VR631 (DECODER-3)
Analog Board
8
Supply the Stairstep signal (5 Steps, Chroma off) to the
Video Input Connector 1.
8
Connect the terminated Oscilloscope with 75
Ω
to the
Multiscreen Output Connector.
8
Press the Numeric Button 1.
8
Adjust VR631 so that the 700 mV portion of the Stairstep
signal becomes 700 ± 15 mV as shown in Fig. 4-2.
3
Motion Detector Board
8
Set the #5 and #8 of SW23 on the Main Board to ON
position as shown in Fig. 4-3.
Fig 4-3
8
Turn on the power.
(10). G/L PLL DC Adjustment
Test Point:
TP601 (G/L PLL DC-1)
Motion Detector Board
TP602 (G/L PLL DC-2)
Motion Detector Board
Adjust:
L607 (G/L PLL DC-1)
Motion Detector Board
L608 (G/L PLL DC-2)
Motion Detector Board
8
Supply the Ramp signal to the Video Input Connector 1.
8
Connect the Digital Voltmeter to TP601.
8
Adjust L607 to obtain 2.5 ± 0.1 V.
8
Connect the Digital Voltmeter to TP602.
8
Adjust L608 to obtain 2.5 ± 0.1 V.
(11). Pedestal Adjustment
Test Point:
TP101 (Y-1)
Motion Detector Board
TP201 (Y-2)
Motion Detector Board
Adjust:
VR101 (Y.PED-1)
Motion Detector Board
VR201 (Y.PED-2)
Motion Detector Board
8
Supply the White Raster signal to the Video Input
Connector 1.
8
Set the #1 of SW601 on the Motion Detector Board to ON
position as shown in Fig. 4-4.
Fig 4-4
8
Set the Luminance Level of input signal to 0 mV.
8
Connect the Digital Voltmeter to TP101.
8
Adjust VR101 to obtain 0.7 ± 0.1 V.
8
Connect the Digital Voltmeter to TP201.
8
Adjust VR201 to obtain 0.7 ± 0.1 V.
(12). Y Level Adjustment
Test Point:
TP101 (Y-1)
Motion Detector Board
TP201 (Y-2)
Motion Detector Board
Adjust:
VR102 (Y.GAIN-1)
Motion Detector Board
VR202 (Y.GAIN-2)
Motion Detector Board
8
Supply the White Raster signal to the Video Input
Connector 1.
8
Set the Luminance Level of input signal to 700 mV.
8
Connect the Digital Voltmeter to TP101.
8
Adjust VR102 to obtain 2.4 ± 0.2 V.
8
Connect the Digital Voltmeter to TP201.
8
Adjust VR202 to obtain 2.47 ± 0.2 V.
8
After completing of the adjustment, set the #1 and #2 of
SW601 to OFF position as shown in Fig. 4-5.
Fig 4-5
1 2 3 4 5 6 7 8
ON
OFF
SW23
1 2
ON
OFF
SW601
1 2
ON
OFF
SW601
700
±
15 mV
700 mV portion
– 11 –
LOCATION OF TEST POINTS AND ADJUSTING CONTROLS
CT21
(REAL TIME CLK)
(REAL TIME CLK)
VR751
(MULTI OUT)
TP601
(CLAMP-1)
(CLAMP-1)
VR551
(CLAMP-1)
TP602
(CLAMP-2)
(CLAMP-2)
VR601
(CLAMP-2)
TP603
(CLAMP-3)
VR651
(CLAMP-3)
VR611
(DECODER-1)
(DECODER-1)
L607
(G/L PLL DC -1)
TP601
(G/L PLL DC-1)
TP101
(Y-1)
(Y-1)
VR101
(Y.PED-1)
(Y.PED-1)
VR201
(Y.PED-2)
(Y.PED-2)
VR102
(Y.GAIN-1)
(Y.GAIN-1)
VR202
(Y.GAIN-2)
(Y.GAIN-2)
TP201
(Y-2)
(Y-2)
TP602
(G/L PLL DC-2)
L608
(G/L PLL DC-2)
VR621
(DECODER-2)
(DECODER-2)
VR631
(DECODER-3)
(DECODER-3)
VR701
(REC OUT)
TP801
(FRAME MEMORY CLK)
CT801
(FRAME MEMORY CLK)
CT802
(PLL)
TP802
(PLL)
(PLL)
TP21
(REAL TIME CLK)
TP16
(+5V)
(+5V)
VR2
(+5V)
REAR SIDE
FRONT SIDE
REAR SIDE
FRONT SIDE
REAR SIDE
REAR SIDE
FRONT SIDE
FRONT SIDE
MAIN BOARD (COMPONENT SIDE)
ANALOG BOARD (COMPONENT SIDE)
MOTION DETECTOR BOARD
(COMPONENT SIDE)
(COMPONENT SIDE)
POWER BOARD
(COMPONENT SIDE)
(COMPONENT SIDE)
SW11
SW23
CN403
CN351
CN301
SUB
SPOT
ANALOG BOARD
(COMPONENT SIDE VIEW)
(COMPONENT SIDE VIEW)
FRONT BOARD
LED
BOARD
BOARD
MAIN
BOARD
BOARD
(COMPONENT SIDE VIEW)
(COMPONENT SIDE VIEW)
POWER
BOARD
BOARD
(COMPONENT SIDE VIEW)
REAR BOARD
SCSI IDE
BOARD
BOARD
(COMPONENT SIDE VIEW)
(COMPONENT SIDE VIEW)
MOTION DETECTOR BOARD
(PATTERN SIDE VIEW)
CN404
CN13
CN11
CN351
CN402
CN14
CN15
CN301
CN12
CN403
CN402
CN12
CN701
CN14
CN17
CN702
CN15
CN16
CN13
CN11
CN403
CN801
CN11
CN4
CN2
E11
CN1
AC IN
COOLING FAN
HDD
CN2
CN1
CN3
CN10
CN9
CN8
COPY
EXT STORAGE
E105 JHD500L01A
E113 JHD500L09B
E110 JHD500L06A
E108 JHD500L04A
E104 K9ZZ00000754
L101
J0KD00000029
J0KD00000029
L102
J0KD00000029
J0KD00000029
E103 K9ZZ00000753
E109 JHD500L05A
E119
K1P
A
50D00002
E118
K1P
A
50D00001
E112 JHD500L08B
E114 JHD500L11B
E115 JHD500L12A
E116 JHD500L13A
CN801 ELYD09V505
E107 JHD500L03A
E106
JHD500L02A
E111 JHD500L07A
CN601
CN101
CN501
CN502
WIRING DIAGRAM
– 12 –
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