Sony BDP-BX1 Service Manual page 104

AV Board Video Section Flow
Ch[..___ input of each power
q 2p-"_'Te-_'_ _
IC202 pin 5 is +6V
Yes
Ch_ output of each power
q 2['6-_f-0_
IIC202 pin 4 is +3.3V
Yes
_Replace IC link
Replace PS201 if Q207 is NG
If IC202 is NG, check the pattern from
CN001 pin 1
._ Check the control of each
power
IQ201 emitter is 3.3V
IIC202 pin 1 is 5V
_ Yes
Replace device
Replace Q207 if Q207 collector is NG
Rep ace IC202 if IC202 pin 4 is NG
_lCheck control lines
Replace R260 if Q201 is NG
Replace R202 if IC202 is NG
Ch_ -5V power
q21-62_coq-_-5v
_ Yes
Check voltage before and after each coil
L201 and 204 are +3.3V
L202 and 205 are -5V
L203 s +5V
_ Yes
_ input of video signals?
_a_ _'gn-'_--
IQ202 base C signal
IQ204 base Y signal
IQ205 base Cb signal
IQ206 base Cr signal
_ Yes
_ input of video signals in IC206?
IQ202 emitter C signal
IQ204 emitter Y signal
IQ205 emitter Cb signal
IQ206 emitter Cr signal
_ Yes
input of control signals in IC206?
Yes
Is there output of signals from each video
output terminal?
_ Replace device
IReplace Q213
lb Replace device
IReplace L201 and 204
IReplace L202 and 205
I Replace L203
_lReplace FFC between CN203 and MB
Iboard, Replace MB board if NG.
_9_tReplace transistor, emitter resistance
IReplace FFC between CN203 and MB
No
_9_l_lboard, Replace R232 and 233 if NG
Replace MB board if NG
_9_tReplace IC260, Replace AV board if NG
Iu
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