Pioneer HTP-072 Service Manual page 19

5
No FL DISPLAY
This is just for general reference and does not including every single case.
No FL DISPLAY
Are the voltage 2.3 Vac to 2.5 Vac?
(FRONT Assy CN701 pins 7, 9)
No
Are the voltage 2.28 Vac?
Yes
(FRONT Assy FLT701
pins 1, 2, 38, 39)
No
Are the voltage -30 V?
(FRONT Assy CN705
pins 24, 25)
Yes
Is the voltage -30 V?
(FRONT Assy C728 - side)
Yes
Is the voltage 3.3 V?
(FRONT Assy C730 + side)
Yes
Is damage in FLT701?
Yes
Replace FLT701.
5
6
Is the voltage 2.27 Vac
No
to 2.28 Vac?
(Transformer orange wire)
Yes
Replace FLT701 or
replace FRONT Assy.
Check FLT701, R779, R780 or
replace FRONT Assy.
Are the voltage -30 V?
No
(CPU Assy CN704B
pins 24, 25)
Yes
Replace FFC.
No
Check L701, IC701 or
replace FRONT Assy.
No
Check Q702, Q703, R777, R778
or replace FRONT Assy.
No
Replace FRONT Assy.
6
7
No
Replace Power transformer.
Are the voltage -30 V?
No
(CPU Assy CP2
pins 10, 11)
Yes
Replace CP2 or replace CPU Assy.
HTP-072
7
8
Are the voltage -30 V?
No
(MAIN Assy CP14
pins 10, 11)
Yes
Replace CP14.
Check Q17, R64, R65, R66, D23,
ZD24, ZD25 on MAIN Assy
or replace MAIN Assy.
8
A
B
No
C
D
E
F
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