Panasonic TH-50PX20U/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) 13
6.6. Lead of Wiring (6) 14
7 Self-check Function 15
7.1. Self-check of the microcomputer control system (bus line)
15
7.2. Power LED Blinking timing chart 16
7.3. No Power 17
7.4. No Picture 18
7.5. Local screen failure 18
8 Serviceman Mode (Electronic Controls) 19
9 CAT (computer Aided Test) mode 21
9.1. IIC mode 21
9.2. CD mode 22
9.3. SD mode 22
9.4. IIC mode structure (following items value is sample data.)
23
10 Adjustment Procedure 24
10.1. Driver Set-up 24
10.2. Initialization Pulse Adjust 25
10.3. P.C.B. (Printed Circuit Board) exchange 26
10.4. Adjustment Volume Location 26
10.5. Test Point Location 26
11 Adjustment 27
11.1. Pedestal setting 27
11.2. NTSC panel white balance 28
11.3. HD panel white balance 29
11.4. 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 36
13.4. TA and TB-Board 38
13.5. H-Board 39
13.6. DV-Board 40
13.7. DG-Board 42
13.8. D-Board 44
13.9. C1-Board 47
13.10. C2-Board 48
13.11. C3-Board 49
13.12. C4-Board 50
13.13. C5-Board 51
13.14. C6-Board 52
13.15. SC-Board 53
13.16. SU-Board 56
13.17. SD-Board 57
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
HDMI INPUT HDMI type A connector
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-50PX20U-P