Pioneer PDP-5010FD, Руководство по обслуживанию

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PDP-5010FD
56
1 2 3 4
1 2 3 4
C
D
F
A
B
E
Is the input selecter set to TV?
(ANT-A or B) Set the Input selector to TV.
(ANT-A or B)
No
Check around the FE and check
the communications between FE
and microcomuputer. If there was
no ploblem replace MAIN Assy.
No
Check the circuit between IC4601 and
IC4801 and replace broken parts.
No
The panel is defective.
No
Check around IC4601 and check the
communications between IC4601
and microcomuputer.If there was no
ploblem replace IC4601.
No
Check around the IC that is found to
have failure in communication and
the microcomputer. If there was no
ploblem replace MAIN Assy.
No
No
No
Replace the MAIN Assy.
Yes
Yes
TV signal is not displayed on the
screen.
=> TV
Is a signal output normally from
the FE to IC4601?(pins 55, 57)
Yes
Which signal is not output,
main or sub signal?
Is a signal output from IC4601?
(pins 42, 45)
Has the signal arrived at IC4801?
(pins 22, 26)
Yes
Has the symptom been settled
when the MAIN Assy is replaced?
Yes
Yes
Is the communication between
each IC on the MAIN Assy and
the microcomputer normal?
Yes
Has the signal arrived at IC4801?
(pin 70)
Yes
MAIN
SUB
2
4
8
Is a signal output from IC4601?
(pin 49)
5
6
3
7
No video from TV signal
2
IC4601 - pin 57
V: 500 mV/div H: 20
μ
sec/div
3
IC4601 - pin 42 (S-video)
V: 500 mV/div H: 20
μ
sec/div
4 4
IC4601 - pin 45 (Composite)
V: 500 mV/div H: 20
μ
sec/div
IC4601 - pin 45 (S-video)
V: 500 mV/div H: 20
μ
sec/div
5
IC4601 - pin 49 (Composite)
V: 500 mV/div H: 20
μ
sec/div
6
IC4801 - pin 70 (Composite)
V: 500 mV/div H: 20
μ
sec/div
7 7
IC4801 - pin 22 (Composite)
V: 500 mV/div H: 20
μ
sec/div
IC4801 - pin 22 (S-video)
V: 500 mV/div H: 20
μ
sec/div
8
IC4801 - pin 26 (S-video)
V: 500 mV/div H: 20
μ
sec/div
Waveforms
Input signal: Color-bar