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General Test Procedure Notes
1. The media center will not turn on unless it senses a speaker connected to the Zone 1 (or Zone
2) speaker connector. Connecting a speaker cable to the Zone 1 (or Zone 2) speaker connector or
physically shorting J301 pin 8 and 5 together will allow the media center to turn on. Disconnecting
a Zone output will cause that Zone to turn off.
2. After completing any or all adjustment procedures requiring TAP commands, the FLASH
memory must be updated to store the adjustments. Refer to the Adjustment/Performance Verifica-
tion Procedure 10.
3. All AM and FM adjustments must be performed when replacing a main or tuner PCB in order to
ensure an optimized tuner. All TAP related tuner adjustments are stored in FLASH memory on the
main PCB.
4. Functional/Performance Verification Tests: Contain tests to verify the performance and function
of the AV28 media center.
Adjustment/Performance Verification Procedures: Contain procedures to optimize the performance
of the AV28 media center.
1. TAP Test Cable Connection
1.1 Connect the test cable’s, part number
264565, DB-9 connector to the RS-232 COM
port on your computer. Connect the test
cable’s 3.5mm plug to the serial data jack on
the AV28 media center.
1.2 With a Hyperterminal window open, apply
power to the AV28 media center. A response
similar to the following will be displayed on
your computer screen.
Reset!
Fixture Detection ... Failed.
Phase 1 Input Pattern :11010111101
Zone Sense Bus ... Failed.
Memory Tests ... Passed.
Ready for test...
>Self-test phase has expired...
UEI Chip Result : BOS0
IR Loopback ... Passed.
Tuner Board Variant : USA
RF House Code : 0010
Booting Cirrus API...
Initializing Encoder...
ive Info...
CD/DVD Drive ... Passed.
Booting Application.
..
Issuing TAP Commands to the AV28 media center
2. Verify the media center communicates in
TAP mode
2.1 Type the command PS C and hit “Enter”.
A response similar to the following will be
displayed on your computer screen. (power
on self test results).
Fixture Detection ... Failed.
...Phase 1 Inputs : Not Found.
I2C Bus ... Passed.
TAP Bus ... Failed.
...TAP RX : Short to ground.
Smart Speaker Bus ... Passed.
CCB Bus ... Passed.
Keypad Bus ... Passed.
VFD Bus ... Passed.
Zone Enable Bus ... Passed.
Zone Sense Bus ... Failed.
...Zone 1 Sense : Short to ground.
Zone MUX Bus ... Passed.
RF Bus ... Passed.
IR Blaster Bus ... Passed.
Miscellaneous Pins ... Passed.
All Pins Short Test ... Passed.
I2C Chip Tests ... Passed.
CCB Chip Tests ... Passed.
RF Loopback ... Passed.
Memory Tests ... Passed.
UEI Query ... Passed.
IR Loopback ... Passed.
CD/DVD Drive ... Passed.
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