Diagnosis; Diagnosis Flowchart - Pioneer VSX-519V-K Service Manual

5

5. DIAGNOSIS

5.1 DIAGNOSIS FLOWCHART

[1] DSP TROUBLESHOOTING
Troubleshooting
Step 0: Preliminary confirmation
Confirm the following items before checking
Do screws of COAX
Jack securely tighten?
OR connect GND wire of
DSP JIG B'D to chassis.
Yes
To Step 1
Step 1: BtoB connector
CP200,CN206,CP105 BtoB connector
Are the
No
connectors securely
inserted?
Yes
*CN206,CP200 connectors
To Step 2
doesn't connection in case
of DSP JIG B'D use.
Step 2: Regulator IC
REG103 (Pin 3)
(to chassis)
Is the
No
voltage of around
5 V input?
Yes
REG103 (Pin 2)
(to chassis)
Is the
No
voltage of 3.3 V
output?
Yes *The I/O power of DSP Assy is OK
ZD200 kathode
Is the
No
voltage of 2.5 V
output?
Yes
*The IC106 power of DSP Assy
To Step 3
5
6
No
Tighten screws securely.
Turn the power off and
insert the connectors
securely.
Check the REG103 and
MAIN Assy.
Replace REG103.
Check the ZD200 2.4 VB
and IC106.
6
7
Step 3: Regulator IC
REG101, REG102 (Pin 3)
Is the
voltage of 3.3 V
input?
Yes
REG101, REG102 (Pin 2) (to chassis)
Is the
voltage of 1.2 V
output?
Yes
To Step 4
Step 4: X'tal
IC109 (Pin 6, 7)
Is there
a 24.576 MHz
output?
Yes
IC102 (Pin 17)
Is there
a 24.576 MHz
input?
Yes
To Step 5
VSX-519V-K
7
8
(to chassis)
No
Check the REG101,
REG102 and MAIN Assy
Note: REG101, REG102 is made of
parallel connection.
No
Replace REG101, 102.
*the DSP IC CORE power of DSP Assy
No
Check the path to pin 6, 7 of IC109.
Replace XTAL101.
XMCK
No
Check the path to XTAL101.
8
A
B
C
D
E
F
21