Marantz SA12 - S2 B Bus; Peripherals; Audio Clock Select; Slow Blanking

27
S2B bus
The S2B is the interface between the digital part and the front
end. This bus links the STi5505 and the MACE2. The S2B
echo command permits to check the communication
between those devices.
Peripherals
Audio clock select
This clock is derived from the SACD CLOCK by the mono
board system clocks. The audio PCM_CLK can take 3
values. The Sti5505 PIO's permit to select 3 different
frequencies depending on the application. Check those
frequencies on F566
Audio mute
Center on/Mono
Check whether we can switch between the mono mode and
the stereo mode. Measure the level on F633.
I2C DAC
Check whether you can enable or disable the I2C switch.
When driving the I2C_DAC signal measure the
corresponding level at F001.
Slow blanking
An additional part of the video-path is the scart-switching or
slow blanking voltage.
This voltage can be 0V, 6V. Check at F620 the output voltage
with next commands:
PCM Audio on I2S bus
For this test connect the A/V board and the front panel to the
monoboard. Don't forget to power up the front panel. The I2S
audio signals are measured in 3 different situations: no
audio, sine wave is played, pink noise is played.
No audio
Switch ON the power supplies and check these signals
Ref.# Command Name Remark
601 S2b Echo Write and read back
Ref.# Command
Name
Frequency SEL_AC
LK2
SEL_AC
LK1
1400 Clock
11.289 MHz
11.2896
MHz
01
1401 Clock
12.288 MHz
12.288
MHz
10
1402 Clock
24.576 MHz
24.576
MHz
11
PM3394B
ch1
ch1: freq= 11.4MHz
CH1 1.00 V~ MTB50.0ns ch1+
1
PCM clk 11,298MHz
CL 06532152_022.eps
051200
PM3394B
ch1
ch1: freq= 12.3MHz
CH1 1.00 V~ MTB50.0ns ch1+
1
PCM clk 12.288MHz
CL 06532152_023.eps
051200
Ref.# Command
Name
MUTE_AV at F625 Remark
109 Mute ON +4.8V Audio Mute On
110 Mute OFF -8V Audio Mute Off
Ref.# Command Name Center on Remark
113 Centre-On-Stereo Pin On 3.3V Mono
114 Centre-On-Stereo Pin Off 0V Stereo
Ref.# Command Name level
1301 I2C enable H = 5V
1302 I2C disable L = 0V
Ref.# Command Name Remark Level
1410 Scart Low No picture 0V ± 0.5V
1411 Scart Medium 16/9 format 6V ± 10%
Signal Test
point
type Level Frequency
SCLK_AV F637 Clock LVTTL 2.82MHz
< 0.02%
LRCLK_AV F641 Clock LVTTL 44.1KHz
< 0.02%
PCM_CLK_AV F640 No signal LVTTL N/A
PCMOUT_AV F638 No signal LVTTL N/A
PM3394B
ch1
ch1: freq= 24.6MHz
CH1 1.00 V~ MTB50.0ns ch1+
1
PCM clk 24.576MHz
CL 06532152_024.eps
051200