Optional Cards; Brbk-301 - Sony BRC-300 Service Manual

4-6. Optional Cards

n
When checking the optional card, extend the card using the extension board EX-947.

4-6-1. BRBK-301

e-1. Image is not displayed.
e-1
Does the unit
correctly function when
another BRBK-301 is
connected to the slot
on the main unit ?
Yes
Does the unit
correctly function when
connected to a normal
BRC-300/P ?
Yes
pins A1 to E1of CN7001
BRBK-301 connection
failure
Connect this unit to the
BRC-300/P or the
BRU-300/P securely.
L7008 on the AN board ?
4-26
No
No
Is +12 V supplied to
No
on the AN board ?
Yes
voltage of CN7001 on the
AN board 0 V ?
Does +3.3 V exist in
No
L7006, L7007 on the
AN board ?
Yes
No
Does _3.3 V exist in
Yes
Go to 4
(Next page)
BRC-300/P failure
Go to a-10.
BRU-300/P failure
Go to c-6.
No
Is the pin A13
Yes
AN board failure
(R7001 or the peripheral
circuit)
Replace the defective
parts or this unit.
AN board failure
Replace this unit.
AN board failure
(IC7009, Q7001, Q7003,
or the peripheral circuit)
Replace the defective
parts or this unit.
AN board failure
(IC7010, Q7002, Q7004,
or the peripheral circuit)
Replace the defective
parts or this unit.
BRC-300/300P
BRU-300/300P