Panasonic TH-42PA20U/P, Service Manual

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1 Applicable signals 4
2 Safety Precautions 5
2.1. General Guidelines 5
3 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 6
4 About lead free solder (PbF) 7
5 Service Hint 8
6 Location of Lead Wiring 9
6.1. Lead of Wiring (1) 9
6.2. Lead of Wiring (2) 10
6.3. Lead of Wiring (3) 11
6.4. Lead of Wiring (4) 12
6.5. Lead of Wiring (5) 12
7 Self-check Function 13
7.1. Self-check of the microcomputer control system (bus line)
13
7.2. Power LED Blinking timing chart 14
7.3. No Power 15
7.4. No Picture 16
7.5. Local screen failure 16
8 Serviceman Mode (Electronic Controls) 17
9 CAT (computer Aided Test) mode 19
9.1. IIC mode 19
9.2. CD mode 20
9.3. SD mode 20
9.4. IIC mode structure (following items value is sample data.)
21
10 Adjustment Procedure 22
10.1. +B Set-up 22
10.2. Driver Set-up 22
10.3. Initialization Pulse Adjust 23
10.4. P.C.B. (Printed Circuit Board) exchange 24
10.5. Adjustment Volume Location 24
10.6. Test Point Location 24
11 Adjustment 25
11.1. MTS Adjustment 25
11.2. Sub contrast Adjustment (NTSC) 26
11.3. Sub contrast Adjustment (HDTV) 26
11.4. Pedestal setting 27
11.5. NTSC panel white balance 28
11.6. HD panel white balance 29
11.7. Sub brightness setting 30
12 Hotel mode 31
13 Conductor Views 33
13.1. PF-Board 33
13.2. P-Board 34
13.3. PA-Board 37
13.4. TA and TB-Board 39
13.5. H-Board 40
13.6. DG-Board 41
13.7. D-Board 43
13.8. C1-Board 45
13.9. C2-Board 46
13.10. SC-Board 47
13.11. SU and SD-Board 50
13.12. SS, SS2 and SS3-Board 51
13.13. K and G-Board 53
14 Block and Schematic Diagrams 55
AV PROG.OUT VIDEO
(Phono Jack Type)
1.0 Vp-p (75
9
)
AUDIO L-R
(Phono Jack Type × 2)
0.5 Vrms
TO AUDIO AMP AUDIO L-R
(Phono Jack Type × 2)
0.5 Vrms
COMPONENT VIDEO Y 1.0 Vp-p (including synchronization)
INPUT1-2 PB /PR ± 0.35 Vp-p
AUDIO L-R
(Phono Jack Type × 2)
0.5 Vrms
DIGITAL IN INPUT DVI 1.0 24 pin
AUDIO L-R
(Phono Jack Type × 2)
0.5 Vrms
Note:
Design and Specifications are subject to change without notice.Weight and Dimensions shown are approximate.
CONTENTS
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TH-42PA20U-P