Marantz SR8000 Service Manual - Page 37

Trouble Shooting - error pwr1

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11. TROUBLE SHOOTING No Power Standby LED Lights up on no Power supply circuite (PB04) has any problem. standby mode To be check +5VL or PDOWN signal. yes FLD shows no ERROR PWR1 ? yes Vkk or FL is not supplied to PU04 Supply +24V no to PU04? yes Supply +15V no to PU04? yes PU04 has any problem. QU01(76p or 77p) lnput level is too Low. Can PY04 no supply +24V ? yes Can PY04 no supply +15V ? yes Connection has problem PY04 has any problem Relay (LB02:PB04) no control is OK ? yes PB04 , or connection has any problem PY04,or Main Transf(L001) has any problem No picture from Monitor output no VCR1&2 out are OK ? yes OSD menu is shown? yes no OSD IC (QL04 QX06) or have driver QL10, QX12 have any trouble OSD ICs control is no problem Video output stage are no problem Video Input select circutes have problem Input to OSD IC(QL04, QX06) has any trouble. Video input detection has any trouble. To be ckeck CV-DET, Y/C-DET 61

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61
11. TROUBLE SHOOTING
no
yes
no
yes
no
yes
no
no
yes
no
yes
no
yes
yes
No Power
Standby
LED Lights up on
standby mode
FLD shows
ERROR PWR1
?
Supply +24V
to PU04?
PU04 has any problem.
QU01(76p or 77p) lnput level
is too Low.
Can PY04
supply +15V ?
Connection has
problem
Relay
(LB02:PB04)
control is OK ?
PB04 , or connection has
any problem
PY04,or Main Transf(L001)
has any problem
Vkk or FL is not supplied
to PU04
Power supply circuite (PB04)
has any problem.
To be check +5VL or
PDOWN signal.
Supply +15V
to PU04?
PY04 has
any problem
Can PY04
supply +24V ?
OSD IC (QL04 QX06)
or have
no
driver QL10, QX12 have
any trouble
yes
no
yes
Input to OSD IC(QL04, QX06) has any trouble.
Video input detection has any trouble.
To be ckeck CV-DET, Y/C-DET
No picture
from Monitor output
OSD menu is
shown?
Video Input select circutes
have problem
VCR1&2 out
are OK ?
Video output stage are no problem
OSD ICs control is no problem