Pioneer VSX-321-K-P Service Manual page 21

5
Step 3: Diagnosis
Each data lines confirmation checks it after standby off/on.
CN601 (pin 10)
Is the voltage 0 to 3.3 V?
Yes
CN601 (pin 7)
Is there a data input?
(0 to 3.3 V)
Yes
CN601 (pin 8)
Is there a data input?
(0 to 3.3 V)
Yes
To Step 4
Step 4: X'TAL
IC201 (pin 41)
Is there a 24 MHz output?
Yes
IC200 (pin 97)
Is there a 18.432 MHz
output?
Yes
To Step 5
5
6
SUB_RESET
No
Diagonose the MAIN Assy.
CSCK_MAIN
No
Diagonose the MAIN Assy.
SCDO_MAIN
No
Diagonose the MAIN Assy.
No
Replace IC201 or XTAL200.
No
Check the path to pin 97 of
IC200. Replace IC200.
6
7
Step 5: INPUT/OUTPUT Diagnosis
JACK201 (pin 18)
Is the voltage 5 V?
Yes
JACK202 (pin 18)
Is the voltage 5 V?
Yes
JACK203 (pin 18)
Is the voltage 5 V?
Yes
JACK205 (pin 18)
Is the voltage 5 V?
Yes
To Step 6
HTP-071
7
8
* when connected the equipment to
IN1 (CD/SAT): +5V_R317 (Not Insert)
No
Check the JACK201. If JACK201
is failure, replace JACK201.
* when connected the equipment to
IN2 (BD): +5V_R315 (Not Insert)
No
Check the JACK202. If JACK202
is failure, replace JACK202.
* when connected the equipment to
IN3 (DVD): +5V_R316 (Not Insert)
No
Check the JACK203. If JACK203
is failure, replace JACK203.
* when connected the equipment to IN4
(DVR/BDR): +5V_R318 (Not Insert)
No
Check the JACK205. If JACK205
is failure, replace JACK205.
21
8
A
B
C
D
E
F