Pioneer VSX-1022-K Service Manual page 40

1
A Step 3: Diagnosis
Each data lines confirmation checks it after standby off/on.
IC1001 (pin 69)
Is the voltage 0 to 3.3 V?
Yes
IC1001 (pins 66, 67)
B
Does a signal
output in constant period?
(0 to 3.3 V)
Yes
IC1203 (pin 53)
Is there a data output?
(0 to 3.3 V)
Yes
IC1203 (pins 62, 61)
C
Does a signal
output in constant period?
(0 to 3.3 V)
Yes
IC1202 (pin 51)
Note1:
IC1202 - using the model VSX-1022/42/827
Is there a data
input and output?
(0 to 3.3 V)
Yes
D
IC1202 (pins 54, 53)
Does a signal
output in constant period?
(0 to 3.3 V)
Yes
To Step 4
Step 4: X'TAL
E
IC1001 (pins 113, 114)
Is there a 27 MHz
input/output?
Yes
IC1202 (pins 21, 22)
Is there a 28.63636 MHz
input/output?
F
Yes
A
40
1
2
XHDPP_RST
No
Check the parts and patterns
in the path pin 3 of IC102.
66: VSCL
67: VSDA
Check the parts and patterns in the
No
path pins 1, 2 of IC102. If IC1001 is
failure, replace the D-MAIN Assy.
XABT_RST
No
Check the parts and patterns in
the path pin 7 of IC102.
62: VSCL
61: VSDA
Check the parts and patterns in
No
the path pins 1, 2 of IC102.
If IC1203 is failure, replace IC1203.
XADV_RST
No
Check the parts and patterns in
the path pin 8 of IC102.
54: VSCL
53: VSDA
Check the parts and patterns in
No
the path pins 1, 2 of IC102.
If IC1203 is failure, replace IC1203.
Check the X1001 and its
No
peripheral circuits or replace
the D-MAIN Assy.
Check the X1202 and its
No
peripheral circuits or replace
IC1202.
VSX-1022-K
2
3
A
IC2003 (pin 7)
Is there a 27 MHz
input?
Yes
To Step 5
Is there a 27 MHz
input?
Yes
Check the IC1201 and its
peripheral circuits or replace
IC1201.
Step 5: ANALOG UP (VSX-1022/42/827 only)
CN101
Are the connectors
securely inserted?
Yes
IC102 (pin 12)
Does a signal
output high (3.3 V)?
When inserting
Component Y signal.
Yes (3.3 V)
IC1202 (pins 36, 47, 48, 49, 50)
Does a signal output
in constant period?
(WAVE)
Yes
To Step 6
Step 6: TMDS
IC1001
(pins 152,153,154,155,156,157,158,159)
Are there signals
(approx. 0.5 Vp-p)
IN all lines?
Yes
End
3
4
No
IC1201 (pins 1, 2, 6)
Check the X1201 and its
No
peripheral circuits or replace
IC1203.
No
Turn the power off and insert
the wire securely.
COMP_DET
No
Check the line and IC102.
Yes
Check the VIDEO Assy.
SIGNAL INPUT
Check the line and IC1202.
No
If IC1202 is failure, replace IC1202.
IC1202 (pin 36 (CVBS), 47 (CR),
48 (CB), 49 (Y), 50 (SOY))
TMDS OUTPUT
No
Check the IC1001. If IC1001 is
failure, replace the D-MAIN Assy.
4