JBL SDP-5 (serv.man7) Service Manual ▷ View online
A-A Tests
Analog Generator
Analog Analyzer
Switcher M
See
Bal/
Gnd/
Typical
Upper
Lower
Test Name
Note:
Left
Right
Freq (Hz)
Z-out
Unbal
Float
Level
Measure
Reading
Limit
Limit
Filter
Imp.
Band.
A In
ANLG_MAIN_IN6_96K_TO_ANLG_MAIN_OUT
ANLG_MAIN_IN6_96K_TO_ANLG_MAIN_OUT_GAIN
3
4.0Vrms
4.0Vrms
997
20
Unbal
Float
Vrms
Level
+7.80
+8.90
+6.60
40kHz LP 100k
<10 - >500k
1
ANLG_MAIN_IN6_96K_TO_ANLG_MAIN_OUT_FREQ
3
2.00 Vrms
2.00 Vrms
10-20k/40k
20
Unbal
Float
dBr
Level
<-0.05/-0.25
+0.05
-0.15/-0.50 None
100k
<10 - >500k
1
ANLG_MAIN_IN6_96K_TO_ANLG_MAIN_OUT_THD
3
4.0Vrms
4.0Vrms
20-2k/8k-40k
20
Unbal
Float
%
THD+N
<.005/.010
.010/.020
.00005
40kHz LP 100k
<10 - >500k
1
ANLG_MAIN_IN6_96K_TO_ANLG_MAIN_OUT_XTALK
3
4.0Vrms
4.0Vrms
15k
20
Unbal
Float
dB
Level
>-85.00
-80.00
-150.00
None
100k
<10 - >22k
1
ANLG_MAIN_IN6_96K_TO_ANLG_MAIN_OUT_SNR
3
OFF
OFF
997
20
Unbal
Float
dBr
Level
-99.00
-97.00
-140.00
None
100k
<10 - >22k
1
ANLG_MAIN_IN7_96K_TO_ANLG_MAIN_OUT
ANLG_MAIN_IN7_96K_TO_ANLG_MAIN_OUT_GAIN
3
4.0Vrms
4.0Vrms
997
20
Unbal
Float
Vrms
Level
+7.80
+8.90
+6.60
40kHz LP 100k
<10 - >500k
1
ANLG_MAIN_IN7_96K_TO_ANLG_MAIN_OUT_FREQ
3
2.00 Vrms
2.00 Vrms
10-20k/40k
20
Unbal
Float
dBr
Level
<-0.05/-0.25
+0.05
-0.15/-0.50 None
100k
<10 - >500k
1
ANLG_MAIN_IN7_96K_TO_ANLG_MAIN_OUT_THD
3
4.0Vrms
4.0Vrms
20-2k/8k-40k
20
Unbal
Float
%
THD+N
<.005/.010
.010/.020
.00005
40kHz LP 100k
<10 - >500k
1
ANLG_MAIN_IN7_96K_TO_ANLG_MAIN_OUT_XTALK
3
4.0Vrms
4.0Vrms
15k
20
Unbal
Float
dB
Level
>-85.00
-80.00
-150.00
None
100k
<10 - >22k
1
ANLG_MAIN_IN7_96K_TO_ANLG_MAIN_OUT_SNR
3
OFF
OFF
997
20
Unbal
Float
dBr
Level
-99.00
-97.00
-140.00
None
100k
<10 - >22k
1
ANLG_MAIN_IN8_96K_TO_ANLG_MAIN_OUT
ANLG_MAIN_IN8_96K_TO_ANLG_MAIN_OUT_GAIN
3
4.0Vrms
4.0Vrms
997
20
Unbal
Float
Vrms
Level
+7.80
+8.90
+6.60
40kHz LP 100k
<10 - >500k
1
ANLG_MAIN_IN8_96K_TO_ANLG_MAIN_OUT_FREQ
3
2.00 Vrms
2.00 Vrms
10-20k/40k
20
Unbal
Float
dBr
Level
<-0.05/-0.25
+0.05
-0.15/-0.50 None
100k
<10 - >500k
1
ANLG_MAIN_IN8_96K_TO_ANLG_MAIN_OUT_THD
3
4.0Vrms
4.0Vrms
20-2k/8k-40k
20
Unbal
Float
%
THD+N
<.005/.010
.010/.020
.00005
40kHz LP 100k
<10 - >500k
1
ANLG_MAIN_IN8_96K_TO_ANLG_MAIN_OUT_XTALK
3
4.0Vrms
4.0Vrms
15k
20
Unbal
Float
dB
Level
>-85.00
-80.00
-150.00
None
100k
<10 - >22k
1
ANLG_MAIN_IN8_96K_TO_ANLG_MAIN_OUT_SNR
3
OFF
OFF
997
20
Unbal
Float
dBr
Level
-99.00
-97.00
-140.00
None
100k
<10 - >22k
1
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT_GAIN
3
4.00 Vrms
4.00 Vrms
997
20
Unbal
Float
Vrms
Level
+4.00
+4.15
+3.85
40kHz LP 100k
<10 - >500k
3,4,5,5
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT_FREQ
3
2.00 Vrms
2.00 Vrms
10-40k
20
Unbal
Float
dBr
Level
<-0.03
+0.05
-0.25
None
100k
<10 - >500k
3,4,5,5
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT_THD
3
4.0Vrms
4.0Vrms
20-5k/10k-40k
20
Unbal
Float
%
THD+N
<.01/.015
.010/.020
.00005
40kHz LP 100k
<10 - >500k
3,4,5,5
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT_XTALK
3
4.0Vrms
4.0Vrms
15k
20
Unbal
Float
dB
Level
>-104
-95.00
-150.00
None
100k
<10 - >22k
3,4,5,5
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT_SNR
3
OFF
OFF
997
20
Unbal
Float
dBr
Level
-108.00
-100.00
-140.00
None
100k
<10 - >22k
3,4,5,5
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT_DADIRMUX
ANLG_MAIN_IN345_96K_TO_ANLG_MAIN_DIR_OUT_DADIRMUX
2 & 3
OFF
OFF
997
20
Unbal
Float
Vrms
Level
-80.00
-70.00
-140.00
40kHz LP 100k
<10 - >500k
3,4,5,5
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT_GAIN
3
4.00 Vrms
4.00 Vrms
997
20
Unbal
Float
Vrms
Level
+4.00
+4.15
+3.85
40kHz LP 100k
<10 - >500k
6,7,8,8
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT_FREQ
3
2.00 Vrms
2.00 Vrms
10-40k
20
Unbal
Float
dBr
Level
<-0.03
+0.05
-0.25
None
100k
<10 - >500k
6,7,8,8
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT_THD
3
4.0Vrms
4.0Vrms
20-5k/10k-40k
20
Unbal
Float
%
THD+N
<.01/.015
.010/.020
.00005
40kHz LP 100k
<10 - >500k
6,7,8,8
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT_XTALK
3
4.0Vrms
4.0Vrms
15k
20
Unbal
Float
dB
Level
>-104
-95.00
150.00
None
100k
<10 - >22k
6,7,8,8
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT_SNR
3
OFF
OFF
997
20
Unbal
Float
dBr
Level
-108.00
-100.00
-140.00
None
100k
<10 - >22k
6,7,8,8
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT_DADIRMUX
ANLG_MAIN_IN678_96K_TO_ANLG_MAIN_DIR_OUT_DADIRMUX
2 & 3
OFF
OFF
997
20
Unbal
Float
Vrms
Level
-80.00
-70.00
-140.00
40kHz LP 100k
<10 - >500k
6,7,8,8
D-A DSP Tests
Digital Generator
Analog Analyzer
Switcher M
See
Bal/
Gnd/
Typical
Upper
Lower
Test Name
Note:
Left
Right
Freq (Hz)
Z-out
Unbal
Float
Level
Measure
Reading
Limit
Limit
Filter
Imp.
Band.
A In
DIG_MAIN_OPT1_IN_96K_TO_ANLG_MAIN_OUT_DSP
DIG_MAIN_OPT1_IN_96K_TO_ANLG_MAIN_OUT_DSP_GAIN
3 & 5
+0.00dBFS
+0.00dBFS
997
n/a
n/a
n/a
Vrms
Level
+8.10
+8.83
+7.43
40kHz LP 100k
<10 - >500k
1,3,5,7
DIG_MAIN_OPT1_IN_96K_TO_ANLG_MAIN_OUT_DSP_THD
3 & 5
-1.00dBFS
-1.00dBFS
997
n/a
n/a
n/a
%
THD+N
<.002
.005
.0002
40kHz LP 100k
<10 - >500k
1,3,5,7
DIG_MAIN_COAX1_IN_96K_TO_ANLG_MAIN_OUT_DSP_DYNRNG
3 & 5
-60.00dBFS
-60.00dBFS
997
n/a
n/a
n/a
dBr
THD+N
>-110.00
-108.00
-140.00
40kHz LP 100k
<10 - 22k
1, 3, 5, 7
Notes:
1. The Analog Zone Direct Input paths are selected at the MUX while the Zone D/A converter is being driven with a -1dBFS Digital Input from COAX1.
2. The Analog Main Direct Input paths are selected at the MUX while the Main D/A converters are being driven with a -1dBFS Digital Input from COAX1.
3. The Audio Precision Switcher channels are selected during the Audio ATE macro.
4. The CLKRNG Tests are used to verify the operation of the PLL circuitry.
5. The DSP Tests are used to verify the operation of the Decoder and DSP Boards.
Module
MC-8/B Setup
Midiman
Clock
Sample
Audio
B In
A Out
B Out
PGM #:
Source
Rate
Source
2
6
18
n/a
96000
Analog
2
6
18
n/a
96000
Analog
2
6
18
n/a
96000
Analog
2
6
18
n/a
96000
Analog
2
6
18
n/a
96000
Analog
2
7
19
n/a
96000
Analog
2
7
19
n/a
96000
Analog
2
7
19
n/a
96000
Analog
2
7
19
n/a
96000
Analog
2
7
19
n/a
96000
Analog
2
8
20
n/a
96000
Analog
2
8
20
n/a
96000
Analog
2
8
20
n/a
96000
Analog
2
8
20
n/a
96000
Analog
2
8
20
n/a
96000
Analog
15,16,17,17
1,3,5,7
2,4,6,8
n/a
96000
Analog
15,16,17,17
1,3,5,7
2,4,6,8
n/a
96000
Analog
15,16,17,17
1,3,5,7
2,4,6,8
n/a
96000
Analog
15,16,17,17
1,3,5,7
2,4,6,8
n/a
96000
Analog
15,16,17,17
1,3,5,7
2,4,6,8
n/a
96000
Analog
15,16,17,17
1,3,5,7
2,4,6,8
n/a
96000
Analog
18,19,20,20
1,3,5,7
2,4,6,8
n/a
96000
Analog
18,19,20,20
1,3,5,7
2,4,6,8
n/a
96000
Analog
18,19,20,20
1,3,5,7
2,4,6,8
n/a
96000
Analog
18,19,20,20
1,3,5,7
2,4,6,8
n/a
96000
Analog
18,19,20,20
1,3,5,7
2,4,6,8
n/a
96000
Analog
18,19,20,20
1,3,5,7
2,4,6,8
n/a
96000
Analog
Module
MC-8/B Setup
Midiman
Clock
Sample
Audio
B In
A Out
B Out
PGM #:
Source
Rate
Source
2,4,6,8
n/a
n/a
11
External
96000
Digital
2,4,6,8
n/a
n/a
11
External
96000
Digital
2, 4, 6, 8
n/a
n/a
11
External
96000
Digital
Lexicon
CHAPTER 5 – TROUBLESHOOTING
This chapter contains a complete description of the diagnostic tests for the MC-8/MC-8 Balanced
(MC8/B). The diagnostics in the MC8/B are used to verify functionality of the unit and to aid in
troubleshooting defective units. Familiarity is assumed with the MC8/B BOM structure, all applicable
assembly drawings, FAT process, and Audio ATE processes.
(MC8/B). The diagnostics in the MC8/B are used to verify functionality of the unit and to aid in
troubleshooting defective units. Familiarity is assumed with the MC8/B BOM structure, all applicable
assembly drawings, FAT process, and Audio ATE processes.
Diagnostic Categories
There are two types of diagnostics in the MC8/B: power-on and extended. The extended diagnostics
contain the tests that are used by manufacturing personnel to verify functionality and by repair personnel
to aid in troubleshooting. The entire set of power-on diagnostics is executed every time a unit is powered
on using the rear panel power switch. The power-on diagnostic tests can be run individually in the
extended diagnostics. The extended diagnostics also contain additional tests used to verify all the front
panel controls, infrared communications, audio and video performance, etc. The troubleshooting or repair
diagnostics are used to troubleshoot an MC8/B if any test fails.
contain the tests that are used by manufacturing personnel to verify functionality and by repair personnel
to aid in troubleshooting. The entire set of power-on diagnostics is executed every time a unit is powered
on using the rear panel power switch. The power-on diagnostic tests can be run individually in the
extended diagnostics. The extended diagnostics also contain additional tests used to verify all the front
panel controls, infrared communications, audio and video performance, etc. The troubleshooting or repair
diagnostics are used to troubleshoot an MC8/B if any test fails.
Power On Modes
There are two power-on modes available. Power on via the rear panel power switch, or by bringing the
unit out of standby mode. The power-on diagnostics are executed every time the rear panel power switch
is switched on. When an MC8/B is operating, if the front panel Standby button is pressed, the unit goes
into low power/Standby mode. Pressing any front panel button or any remote key will bring the MC8/B out
of Standby mode. No diagnostics are run when the unit is brought out of Standby.
unit out of standby mode. The power-on diagnostics are executed every time the rear panel power switch
is switched on. When an MC8/B is operating, if the front panel Standby button is pressed, the unit goes
into low power/Standby mode. Pressing any front panel button or any remote key will bring the MC8/B out
of Standby mode. No diagnostics are run when the unit is brought out of Standby.
Diagnostics User Interface
Various combinations of button pushes are used to control diagnostic activity. The table below
summarizes the options available, followed by more detailed descriptions.
summarizes the options available, followed by more detailed descriptions.
Action
Buttons to be Held
Enter Diagnostics
MAIN VCR & ZONE2 VCR
Skip Power-On Diagnostics
MAIN AUX & ZONE2 AUX
Jump to Extended Diagnostics
MAIN OFF & ZONE2 OFF
Attempt to Run the Next Diagnostic Test
MAIN TV & ZONE2 TV
To Enter Extended Diagnostics:
Press and hold the front panel MAIN VCR and ZONE 2 VCR buttons when powering on a MC8/B.
To Enter Extended Diagnostics via Serial Debug Port:
Enter the debug program by typing “debug” when connected to the serial port. The debug program is
case sensitive.
case sensitive.
In addition, the extended diagnostics can be entered by sending “ed”, (for extended diagnostics), to the
unit via the serial debug port during the first ten seconds after powering on the unit.
unit via the serial debug port during the first ten seconds after powering on the unit.
5-1
MC-8 Service Manual
To skip Power On Diagnostics:
Press and hold the front panel MAIN AUX and ZONE2 AUX buttons. This will cause the unit to skip the
power-on diagnostics and go immediately to the operating system. Immediately after sufficient testing is
performed to verify the system can boot, (the Z180 CPU, EPROM, Z80 SRAM, FPGAs loaded, VFD etc.),
the diagnostics check to see if MAIN AUX and the ZONE2 AUX buttons are being pressed together. If
they are, the unit will attempt to skip the rest of the power up diagnostic tests and jump to the operating
system.
power-on diagnostics and go immediately to the operating system. Immediately after sufficient testing is
performed to verify the system can boot, (the Z180 CPU, EPROM, Z80 SRAM, FPGAs loaded, VFD etc.),
the diagnostics check to see if MAIN AUX and the ZONE2 AUX buttons are being pressed together. If
they are, the unit will attempt to skip the rest of the power up diagnostic tests and jump to the operating
system.
To bridge to Extended Diagnostics after a failure occurs:
Press and hold the front panel MAIN OFF and ZONE2 OFF buttons. This will cause the unit to bridge to
the extended diagnostics. After a failure the unit will attempt to display, on the VFD, and the front panel
LEDs, the failed test number, and loop on the failing test. If the Z180 CPU and support circuitry is not
working the unit will not attempt to read any front panel switches.
the extended diagnostics. After a failure the unit will attempt to display, on the VFD, and the front panel
LEDs, the failed test number, and loop on the failing test. If the Z180 CPU and support circuitry is not
working the unit will not attempt to read any front panel switches.
To execute the next Diagnostic Test after a failure occurs:
Press and hold the front-panel MAIN TV and ZONE2 TV buttons. This will cause the MC8/B to attempt to
execute the next power on diagnostic step. If a failure occurs, the MC8/B attempts to enter a test loop to
keep the signal lines active as an aid in debugging the failure. At the end of each successive loop, the
diagnostics will check to see if the MAIN TV and ZONE 2 TV buttons are being held. Depending on the
length of the test, the amount of time required pressing and holding the buttons will vary.
execute the next power on diagnostic step. If a failure occurs, the MC8/B attempts to enter a test loop to
keep the signal lines active as an aid in debugging the failure. At the end of each successive loop, the
diagnostics will check to see if the MAIN TV and ZONE 2 TV buttons are being held. Depending on the
length of the test, the amount of time required pressing and holding the buttons will vary.
DIAGNOSTIC REPORTING
All diagnostic functionality is reported to the Vacuum Fluorescent Display (VFD) and to the front panel
LEDs. They report on what test is being executed, and if the test passed or failed. The LEDs are used to
report diagnostic status in the event that the VFD is not functioning.
LEDs. They report on what test is being executed, and if the test passed or failed. The LEDs are used to
report diagnostic status in the event that the VFD is not functioning.
Diagnostic status and data is also available on an external PC or a terminal, via the serial debug port
located at the D9 connector labeled RS232 2 on the rear panel. The D9 connector labeled RS232 1 is
used for updating the flash memory. In the event a diagnostic failure occurs for those diagnostic tests that
report to the error log, additional failure information, such as data sent, data received, address location,
etc., is listed in the error log. For example, Sharc SRAM failures are not reported to the error log. The
error log can be viewed via the VFD, or it can be sent to the serial debug port.
located at the D9 connector labeled RS232 2 on the rear panel. The D9 connector labeled RS232 1 is
used for updating the flash memory. In the event a diagnostic failure occurs for those diagnostic tests that
report to the error log, additional failure information, such as data sent, data received, address location,
etc., is listed in the error log. For example, Sharc SRAM failures are not reported to the error log. The
error log can be viewed via the VFD, or it can be sent to the serial debug port.
Vacuum Fluorescent Display (VFD)
The VFD is the primary source of information during diagnostics. The exact display information will
depend on the test(s) being executed. When an individual diagnostic test is executed, the VFD will
display the name of that test. Groups of tests, such as the power-on diagnostics or the burn-in loop, have
a generic message on the top line of the VFD. For example, “DIAGNOSTIC TESTS” is on the VFD while
the power-on diagnostics is being run. An E followed by a number indicates a test failure message.
depend on the test(s) being executed. When an individual diagnostic test is executed, the VFD will
display the name of that test. Groups of tests, such as the power-on diagnostics or the burn-in loop, have
a generic message on the top line of the VFD. For example, “DIAGNOSTIC TESTS” is on the VFD while
the power-on diagnostics is being run. An E followed by a number indicates a test failure message.
Front Panel LEDs
The top row of the front panel LEDs is also used to display diagnostic status. The LEDs are used in
binary format with the Zone 2 VCR LED as the LSB and the Main DVD 1 LED as the MSB. Running test
number 1 would illuminate the Zone 2 VCR LED only with all the others off. Running test number 2 would
illuminate the Zone 2 Sat LED only with all others off. Running test number 3 would illuminate the Zone 2
SAT and the Zone 2 VCR LEDs together with all others off, etc.
binary format with the Zone 2 VCR LED as the LSB and the Main DVD 1 LED as the MSB. Running test
number 1 would illuminate the Zone 2 VCR LED only with all the others off. Running test number 2 would
illuminate the Zone 2 Sat LED only with all others off. Running test number 3 would illuminate the Zone 2
SAT and the Zone 2 VCR LEDs together with all others off, etc.
5-2
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