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Great tape deck manual!
I'm very positively surprised, because it is a very long manual, lot of pages, drawings, diagrams, description of how to make the alignment and adjustment procedures.
It is as good as the old "Naka" manuals from the 1970's - if somebody have seen them, they know what I mean by that.
I recommend to buy this very much !
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I am a vintage hifi collector. No way to fix that device without the appropriate service manual...thanks to your site I got it and every thing is easier now. I got the manual right after ordering: fast cheap accurate ... thank you
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Wonderful job clear. Qick fantastic. These people are really good. If even a problem arise they are wonderful assisting you. These scheme is so net despite this is a very old TV. Thank you for everything!!!!!!!!
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Detailed schematic diagram, manual for professionals
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Good service manual,exploded view,adjusment and test point locations,head alignment,mechanical checks and adjusments,all perfect.
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7.1.7 TROUBLESHOOTING
Video
A
Image of INPUT 1 not displayed (RGB) Yes Is INPUT 1 selected with the input selector? Yes AV I/O Assy 1 2 3 4 5 Has the signal arrived at No Check communication from CN7605 on the AV I/O Assy? the input terminal to IC7610 to CN7605. No Select INPUT 1.
Image of INPUT 3 not displayed (Y/C) Yes VIDEO SLOT Assy - = ~ ! @ Is a signal output from IC6255 on the VIDEO SLOT Assy? Yes Which signal is not output, main or subsignal? Main Input pin of IC5801 Has the signal arrived at IC5801 on the RGB Assy? (Digital RGB) Yes Check the communication up to IC6001 on the RGB Assy. No Check communication between the IC6255 and RGB Assy. Sub No Check communication between the input terminal and IC6255.
C
B
Yes Which signal is not output, Sub main or subsignal?
C
A
Main RGB Assy 6 7 8 No
Has the signal arrived at IC6001 on the RGB Assy? Yes
B
Image of INPUT 4 not displayed (CVBS) Yes VIDEO SLOT Assy 2 3 4 5 6 Is a signal output from IC6107 on the VIDEO SLOT Assy? No Check communication between the input terminal and IC6107.
B
C
Image of INPUT 2 not displayed Yes Is INPUT 2 selected with the input selector? Yes No Select INPUT 2.
Yes Which signal is not output, main or subsignal? Sub
C
Main Input pin of IC5801 Has the signal arrived at IC5801 on the RGB Assy? (Digital RGB) No Check communication between the IC6107 and RGB Assy.
Output pin of IC7503 Is a signal output from IC7503 on the AV I/O Assy? Yes Input pin of IC5701 Has the signal arrived at No IC5701 on the RGB Assy? Check the connection between the AV I/O Assy and RGB Assy. No Check around IC7503.
Yes
D
B
Image of INPUT 5 not displayed Yes VIDEO SLOT Assy ^ & * Is a signal output from IC7902 on the VIDEO SLOT Assy? No Check around the IC that is found to have a failure in communication and the microcomputer. Yes Which signal is not output, main or subsignal? Main Sub No Check communication between the input terminal and IC7902.
B
Yes
Is the communication between each IC and
E
the main microcomputer normal? Yes Does the symptom go away when the RGB Assy is replaced? Yes Finishing troubleshooting No
C
A
Does the symptom go away when the DIGITAL VICEO Assy is replaced? Yes Finishing troubleshooting The panel is defective. No
C
RGB Assy ! @ # Has the signal arrived at No IC6602 on the RGB Assy? Yes Check communication up to IC6602 on the RGB Assy.
F
B
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PDP-504CMX
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